ca no- cepz/kke/token-27 of 2017 -18 serial page no- 69 ... · preambles to the various rates given...

CA NO- CEPZ/KKE/TOKEN-27 OF 2017 -18 Serial Page No- 69

PARTICULAR SPECIFICATIONS

1.0 GENERAL 1.1 Work under this contract shall be carried out in accordance with Schedule

‘A’,(BOQ), Special Conditions, Particular Specifications, including notes thereon (unless specified otherwise) and general rules and specifications given in MES SSR Part l –2009 as well as General Rules, Special Conditions and preambles to the various rates given in MES SSR Part ll –2010 (MES SSR Part I and Part II hereinafter called MES Schedule).

1.2 The term ‘General Specification’ referred to hereinbefore as well as referred to

in IAFW-2249 (General Conditions of Contracts) shall mean the specifications contained in the MES Schedule Part I.

1.3 General Rules, Specifications, Special Conditions, method of measurements,

preambles in the MES Schedule shall be deemed to be applicable to the work under this contract, unless specifically mentioned otherwise in these documents.

1.4 The term ‘as specified’, wherever appears in tender documents, relates to

relevant particular specifications and in its absence general specifications. 1.5 Particular specifications in this section given hereinafter shall be generally

applicable to all works covered under Schedule A. The particular specifications are brief and are only to particularise, amend and emphasize the specifications given in MES Schedule, which are not repeated.

1.6 Where specifications/provisions given in these particular specifications are at

variance with the provisions/specifications given in MES Schedule, specifications/provisions given in these particular specifications, hereinafter, shall be followed.

1.7 Where specifications for any item of work are not given in MES Schedule or in

these particular specifications, specifications as given in relevant Indian Standard or Code of practice shall be followed.

1.8 BLANK 1.9 BLANK

2.0 SCOPE OF WORK 2.1 The scope of work shall be all as described in BOQ and as specified

hereinafter. 3.0 MATERIALS 3.1 All materials to be supplied by the contractor for incorporation in work shall

bear certification of relevant specifications/ISI marked/ conforming to IS.

Contd…/-


PARTICULAR SPECIFICATIONS (Contd../-)

3.2 In case specification of materials needed for incorporation is not contained anywhere in the contract documents, the specification of such materials proposed to be incorporated in the work shall be got approved in writing from the GE before incorporation in the work. Contractor is advised to check availability, lead, time of procurement from these suppliers before quoting the offer.

3.3 All manufactured articles other than those manufactured in contractor’s

workshop at site shall bear ISI certification mark and which are readily available in the market and are given in Special Condition. It is mandatory for the contractor that ISI certified marked items/articles as listed therein shall only be incorporated in the work. Names of manufactures/suppliers of certain items/materials is given in Appendix ‘C’. The Contractor is advised to check availability, lead, time of procurement from these suppliers before quoting.

3.4 Local materials such as stone aggregate, sand, lime etc shall generally

conform to the sample kept in GE’s office in addition to their conformity with relevant specifications given in the tender documents. The samples of such materials shall be got approved from GE in writing before the materials are brought at site in bulk. The contractor shall submit samples of materials to GE through Engineer-in-Charge for approval.

3.5 Letters conveying approval of samples/materials by GE will interalia mention

source of supply/name of manufacturer, trade name/brand (if applicable) and reference to clause of the tender documents containing specification of particular materials.

3.6 The contractor will ensure that the materials incorporated in the work are

identical with the approved samples. If the same is not identical with the approved samples, the same shall be replaced by the contractor to the entire satisfaction of GE without any extra cost to Govt

4.0 BLANK

5.0 EXCAVATION AND EARTHWORK 5.1 Excavation and earthwork shall be carried out all as described in relevant items

of BOQ and as specified under relevant clauses of Section 3 of MES Schedule of rates part – I (Specifications).

5.2 Decision of Garrison Engineer shall be conclusive and binding as regards

classification of soils/ rocks. 5.3 Soil/ rock shall be removed to a distance as indicated in the relevant items of

the BOQ and leveled at places as directed by the Engineer-in-Charge. 5.4 During excavation, proper care shall be taken to avoid damage to water mains,

Pipes, cable etc met if with during excavation. If any damage is caused the same should be made good immediately at his own expense to the satisfaction of Engineer-in-Charge

Contd…/-



6.0 CONCRETE 6.1 MATERIALS 6.1.1 CEMENT: Cement shall be ordinary Portland cement Grade 43 conforming to IS : 8112 of 1989 (latest edition) or Portland Pozolana Cement conforming to : 1489 of 1991, all as specified in Appendix ‘A’ to particular specifications and shall be procured by contractor at his own cost. However, in water retaining structures OPC Grade 43 shall only be used. 6.1.1.1 The following condition shall have to be satisfied before PPC can be allowed to be used in the work :-

(a) PPC should meet the strength criteria of 43 grade OPC as laid down IS 8112 – 1989. (b) The minimum period before striking off form work while using PPC shall be as given in PS clause here-in-after. (c) In cold climate region where temperature is lower than 15 degree Centigrade only OPC shall be used. (d) Mixing of OPC & PPC shall not be allowed in a work. However with the strict control of ground executives different building can have different types of cement. (e) While procuring PPC, the following requirement are to be ensured and certificate to the effect is to be obtained by the contractor for each batch from the manufacturer and the same shall be submitted to the AGE(I) for approved to procure PPC. (i) The quality of fly ash is strictly as per IS-1489 (Part I) -2002. (ii) Fly ash is inter ground with clinker not mixed with clinker. (iii) Dry fly ash is transported in closed containers and stored in silos. Only pneumatic pumping should be used. (iv) The fly ash received from thermal power plants using high temperature combustion above 1000 degree centigrade should be used.”

6.1.2 AGGREGATE (a) Coarse aggregate for all cement concrete works shall be

broken/crushed trap stone conforming to clause 4.4 of SSR Part-I. (b) Fine aggregate for all concrete works except for plastering shall be

naturally occurring river sand/ crushed sand conforming to clause 4.4 of SSR Part-I. Sand conforming to grading zone IV of IS-383 shall not be used for RCC work

(c) Fine aggregate (sand) shall be stored at site in bins or in dumps on brick platform or by using other approved method so as to avoid contamination and risk of shoveling earth or other impurities along with it while in use.

d) All coarse and fine aggregates shall conform to samples kept in the office of the GE.

6.2 BLANK 6.3 DESIGN MIX CONCRETE: 6.3.1 Design mix concrete wherever specified in tender shall be as per clause 4.11.2.1 of SSR Part-I and IS-456. Proportions of cement and aggregates with water to obtain required strength specified shall be determined by weight by the contractor. The contractor shall prepare a trial mix and get the same tested to verify the required workability and characteristic strength. The contractor shall ensure the achievement of the defined strength of the concrete and no laxity shall be allowed on this account.

Contd…/-



6.3.1.2 LABORATORY MIX DESIGN AND TESTS

(a) As soon as possible, after receiving the order to commence work, the contractor shall get concrete mix designed from IITs, RRL, Govt Engineering College, National Test House, SEMT, CME Pune or any other Govt Lab as approved by accepting officer to satisfy the requirements of clause 8.27of particular specifications here-in-above.

(b) The actual proportion of concrete mix shall be arrived at by means of a

number of trial mixes. First trial mix shall be prepared with the mix proportions arrived at as per mix design and other trial mixes with suitable adjustment in mix proportion.

(c) Six numbers of cubes of size 15 x 15 x 15 cm shall be made from each/trial

mix. The concrete cubes shall be tested as per IS-516. Out of six cubes, three will be tested after seven days and remaining three after 28 days from the date of casting.

(d) The test after seven days is intended to give an early indication of the

strength likely to be achieved in 28 days. (e) The concrete shall be deemed to comply with the strength requirements of

clause 15 of IS-456-2000 is met with.

(f) Wherever, there is any change in the type of grading of material, the mix should be redesigned and modified suitably to give the desired compressive strength.

(g) On the basis of above test results, the final design mix will be approved by the Accepting Officer. The approval of the Accepting Officer shall not relieve the contractor of his responsibility for obtaining the required minimum strength of quality concrete in the work.

(h) The mix design of concrete as specified here-in-before shall be mandatory and shall be got done from the agencies as specified here-in-before at contractors cost.

(j) However till receipt design mix report & its approval by Accepting Officer, contractor may be permitted to commence the work by the Accepting Officer based on previous design mix carried out within a year for the same type of cement & sources of material. In this connection ref is made clause No 9.2.3 of IS -456 : 2000. However the balance work shall be got executed as per approved design mix of concrete.

(k) In case cement concrete used in initial stage work out to less than

recommended quantity of design mix, then minus DO for variation more than 5% will be effected. No claim what so ever will be entertained due to use of higher quantity of cement initial stage of work to avoid any delay in progress of work.

(l) The minimum cement requirements for M-25 (design mix) shall be as per IS-456-2000. No price adjustment shall be made on account of variation in cement content after the design mix is approved by the Accepting Officer. The contractor is supposed to take these provisions into consideration while quoting the tender and no claim whatsoever shall be admissible on this account and decision of Accepting Officer shall be final and binding.

NOTE :- Following data and results thereof shall be submitted to the GE by the contractor for approval of mix design prior to commencement of the actual works :- (a) Grading and density of coarse and fine aggregates proposed to be

used.



(b) 7 to 28 days compressive strength of the cement concrete. (c) Mix proportion of aggregates, cement, any admixture and water for

consistency (slumps) tests and their results. (d) Strength characteristics obtained both for 7 and 28 days compressive

strength for the selected trial mixes, using minimum water cement ratios (e) Results of additional trials till the desired slump value was reached and

the target mean strength is obtained to achieve the specifications. 6.3.1.3 For design mix, it will be express condition that only weigh- batching shall be

followed and no conversion of weights into volumes shall be permitted. 6.3.1.4 MIX PROPORTION AND STRENGTH FOR DESIGN MIX CONCRETE (i) Characteristic compressive : 25N/Sq mm strength to be achieved as per IS-456-

strength at 28 days. 2000 for M-25 design mix concrete.

(ii) Type of Cement : Ordinary Port land cement Grade 43 or IS-8112-1989

or Portland Pozzolana cement conforming to IS : 1489:1991.

(iii) Aggregate/cement ratio by : As per mix design based on IS-10262 &IS-456. weight. (iv) Workability : As per clause 7 of IS-456. (v) Water cement ratio : As per mix design based on IS-10262 and IS-456. (vi) Degree of quality control : Good (Refer IS-10262) (vii) Minimum cement content : As per IS-456: 2000 (viii)Maximum size of aggregate : 20 mm graded. (ix) Max water cement ratio : As per table 5 of IS-456 2000. 6.4 Quantity of cement for pricing of tender

6.4.1 The mix design shall be carried out from NIT/Govt Engineering

College/National Test House/Regional Research Laboratories/other test houses having NABL accreditation for carrying out such tests. Works shall be executed accordingly, keeping in view the requisite strength criteria of concrete and structural stability and the contractor shall be fully responsible for the same. The contractor shall be responsible for the use of requisite quantity of cement to achieve the quality and strength of the concrete as per various provisions of IS 456-2000. The contractor is deemed to have verified and obtained details applicable to this effect at a particular station before quoting tender and no claim whatsoever, shall be entertained on account of variation in the quantity of other ingredients of concrete.

6.5 RCC M-25 (DESIGN MIX-RMC) RCC M-25 (Design mix-RMC) wherever specified in the particular

specifications/drgs under this contract shall be Ready Mix Concrete (RMC) all as specified herein below :- RCC M-25 (Design Mix - RMC) shall be carried out as per relevant specication given here in after. However, the design criteria shall be all as per IS : 456.



6.5.1 READY MIX CONCRETE (RMC) Ready Mix Concrete shall be provided for design mixes as specified in CA for

RCC M-25 . Specification for RMC shall be as given below and contractor’s quoted rates shall be deemed to include these provisions.

(a) Supply of RMC shall be conforming to IS-4926-2003 and shall be manufactured by any of the firms as mentioned as under :-

1 Lafarge

2 Ultra Tech

3 ACC

4 RMC Ready Mix

5 Ramco

6 M/s Mohanlal Mathrani Construction Pvt Ltd. 7 M/s V M Matere

8 M/s Ashoka Buildcon

9 M/s Grasim Industries Ltd

10 M/s L & T Concrete

11 M/S Jindal Concrete Pvt Ltd.

12 M/s Nikhil Constructions

Location(s) where quantity of concrete is less than 1 cum, Design mix

concrete in mechanical weigh batcher concrete mixer as per clause 6.3 hereinbefore shall be permitted with prior written approval of GE. Contractor shall submit concrete calculations to GE in support of his request for approval.

(b) Before actual incorporation of RMC at site, the contractor shall get the name of firm approved by CWE from where the contractor proposes to get the RMC. Before approving the name of the firm, the CWE shall visit the manufacturer’s site for inspection of the following :- (i) Infrastructure in terms of storage of aggregates, sand/crushed sand

and cement. (ii) Sources of supply for aggregates, sand/crushed sand and water. (iii) Adequacy of testing facilities for water, materials, cement, concrete,

alkali aggregate reaction, etc at manufacturing yard.

(iv) Batching and weighing arrangements including arrangements for adding calculated quantity of water.

(v) Mixing mechanism. (vi) Quality of engineer supervision and skills of workers. (vii) Record, test registers, etc being maintained. (viii) Capacity of the installed plant and adherence to time schedules. (ix) Data showing periodic calibration of all equipment. (x) Details of batching showing quantity of input items in production of

concrete. Only after CWE himself gets satisfied on inspection of the above points he will approve the firm.

(c) The agency of RMC shall be got approved prior to commencement of concrete work. However the responsibility of maintaining quality and grade of concrete fully rests with contractor.



(d) RMC shall be supplied as per the following information supplied by the Garrison Engineer :- (i) The type of cement to be used. (ii) Maximum size, type of aggregate and its strength determined from

samples of plastic concrete taken at the place and time of delivery in accordance with the requirement of IS 456-2000.

(iii) The minimum acceptable compressive strength determined from sample of plastic concrete taken at the place and time of delivery in accordance with the requirement of IS-456-2000.

(iv) The slump or compacting factor or other requirement of consistency or workability.

(v) The ages at which the test cubes or beams are to be tested and number of tests to be made.

(vi) Any other requirement. (vii) Use of admixtures other than mineral based fly ash/PPC (not

exceeding 20%) in design mix concrete shall not be permitted. (e) Concrete mix design shall be carried out preferably by RMC manufacturer

complying with the relevant IS specifications for all the ingredients as listed below :-

Sl No

Material BIS Specification

(i) Coarse aggregate IS 382- 1970 (ii) Fine aggregate IS 383- 1970 (iii) Fine aggregate(Crushed Sand for

mortar) IS 2116-1980

(iv) Cement IS 269-1989, IS 8112-1989,

IS 12269-1989, IS-1489 (v) Admixture (Only ISI marked

admixtures shall be used.)

IS 9103-99(Rev)

(vi) Fly ash- Gde-I

IS 3812

(f) The initial mix design report properly bound in quadruplicate shall be submitted

by the contractor to GE for approval. Before submission of report by GE for approval trial shall be carried out by contractor and GE at the RMC plant Laboratory under controlled conditions. Contractor shall make six cubes of each trail mix as per mix design report in the presence of Engineer in charge using same ingredients as adopted for design mix and get them tested at 7 days and 28 days. For each design mix, a set of six cubes shall be prepared and from each set, three cubes shall be tested at the age of 7 days and three cubes at the age of 28 days. The cubes shall be made, cured, transported and tested strictly as per IS requirement. The average strength of three cubes at the age of 28 days shall exceed the specified target mean strength for which design mix has been recommended in design mix report. GE shall approve the mix design based on results of design mix and trials carried out by GE. The RMC incorporated in the work shall be in accordance with the approved mix design. Any correction/deviation from approved mix design for any reasons would also need approval of GE. Any consignment of RMC at the time of delivery at site if not acceptable to the GE, shall be taken back/removed from the site at the cost of contractor. The decision of GE in this regard shall be final and binding. Some of the conditions under which GE can reject RMC are enumerated here-in-below :-



(i) Initial setting of concrete due to transit delay. (ii) Segregation of aggregates due to excess rotation of mixer drum during

transit. (iii) The RMC supplied does not give required slump.

In addition to above, GE may further decide the rejection of RMC on any other

technical ground which he decides necessary. (g) A register shall be maintained at site duly signed by the competent

representative of RMC manufacturer/supplier, contractor’s authorised representative and Engineer-in-charge recording the following details :-

(i) Date of delivery (ii) Time of mixing. (iii) Time of delivery at site. (iv) Quantity and grade of RMC.

(h) In case of rejection of supply of RMC supplied by the manufacturer at site, the contractor shall be responsible for making good the same without extra cost to the Govt. The GE/Engineer-in-Charge and other officers authorised by the Accepting Officer shall have access to check on the quality of production in RMC suppliers manufacturing yard as and when they desire so. The contractor shall make all arrangements for such inspections. In case of payment of RAR/deviation pertaining to RCC work, M-25 shall be priced at rates relevant in MES Sch 2010 for Reinforced Cement Concrete M-25 as per deviation condition. No advance payment will be made towards payment made by contractor to RMC manufacturer. No advance on account for cement, coarse aggregate and fine aggregate required for RMC shall be made to the contractor. Type and quality of cement used in RMC shall be in accordance with the specifications as already specified for design mix in the contract agreement here-in-before. It will be the responsibility of the contractor to ensure that the RMC Manufacturer uses in manufacturing RMC the cement/aggregates of grade and quality as described here-in-before. He shall also be responsible to produce necessary paid vouchers and test certificate for the above materials as and when called for by GE for verification to ascertain the correctness of type and quality of materials used by the RMC manufacturer. Paid voucher of RMC shall also indicate details of make/brand of cement used besides batch No, consignment details and test certificate details of procurement of cement. Please note that if cement has been procured by contractor and given to RMC manufacturer, then original paid vouchers and test certificates of cement shall be given to GE alongwith paid vouchers of RMC for claiming payment. However in case of cement used in RMC has been procured directly by RMC manufacturer, in such case certified photo copy of paid vouchers and test certificate of cement purchased shall be also enclosed alongwith paid vouchers of RMC for claiming payment. He shall also be responsible to ensure that the cement used in RMC are of approved make/brand as described here-in-before.



(j) Requisite facilities for verification and check of the raw material shall be made available to GE by the RMC manufacturer. GE will have easy access to the RMC plant to check quality of concrete being produced at the plant at intervals as decided by GE. The GE shall independently carry out the following tests at random at site lab established by the contractor.

(k) Slump test and cube tests shall be carried out as per IS-456-2000 at site from

samples collected by the contractor during placing of the concrete. Cost of the collection of samples and testing shall be deemed to be included in the quoted rate. Acceptance criteria for the RMC shall be all as specified in the IS-456-2000. In Case RMC supplied by the approved firm fails to meet the strength requirement as per acceptance criteria laid down in IS-456-2000 and rejected by GE, the Contractor shall make necessary arrangement for removal of such rejected quantity of RMC and will redo the work at his own cost.

(l) Conveying equipments for concrete shall be water tight, well maintained and

thoroughly cleaned before commencement of concrete mixing. The contractor is free to adopt either centrally mixed concrete incase the plant is installed at site or truck mixed concrete. The temperature of concrete mass on delivery shall not exceed 40°C. RMC so brought at site either from plant at site or by Transit mixers shall be pumped to all the locations to be cast except at locations where not feasible, which may be done all as specified in MES Schedule.

(m) Concrete shall not be dropped from a height, thrown or otherwise treated so

that segregation, undesirable finish, or defective structural quality results. The maximum drop shall be 1.2m unless otherwise approved by the Engineer-in-Charge.

(n) No extra water shall be added to the concrete after it has left the batching

plant. (o) All equipments, pump chamber, hoppers, lines and rubber noses shall be kept

clean at all times. Any build up in the lines of materials from previous operations shall be cleaned out properly.

(p) In the event of break down of the equipment causing delay not exceeding 20

minutes, within which time concrete cannot be placed, the following procedure shall be adopted :-

‘With approval of Engineer-in-Charge, the concrete already in place shall have the ‘Wet edges’ maintained by depositing small quantities of hand mixed concrete placed by hand against the ‘Wet edge” and vibrated into the gaps. Where atmospheric temperature exceed 30 degree centigrade, the receiving hopper and line shall be cleaned out and concrete contained therein discarded and immediately removed from the site. The concrete shall be discarded if initial setting of the concrete has began in the hopper or discharge lines. All lines shall be cleaned free of concrete prior to resumption of pumping after each break down. Concrete in the lines shall be pumped at approximately 8 minutes intervals to ensure the concrete in the line is live. Whenever delivery of concrete to the pump is delayed, the pumping interval shall be reduced to 5 minutes during extra hot weather conditions. Delivery lines where exposed to hot sun shall be protected by covering with bags, wet hessian or other approved means’.



(q) No concreting shall be commenced until the form work, reinforcement and all other preparation require for placement of concrete are inspected by the Engineer-in-Charge and approved.

(r) Contractor shall take every precautions to strengthen the shuttering as

required to withstand the additional pressure that may be created due to pumping of concrete. Workability of concrete shall be as specified in IS-456-2000.

(s) If certain admixtures are required to be added to RMC either in plant or at

place of delivery to improve the workability, the same shall be added as per manufacturer’s instructions with prior approval of Garrison Engineer without any extra cost to Govt. Quantity of admixture at any stage should not exceed the maximum limit as specified by manufacturer. Admixture if any to be used should be compatible with cement Contractor if desires to use admixture shall conduct the test for cement, admixture etc., in an independent testing lab approved by Garrison Engineer without extra cost to the Govt.

(t) Revision of design mix due to change in aggregate proportions due to change

in size and relative density/bulk density of aggregate shall be immediately brought to the notice of the Garrison Engineer and in all cases provisions contained in ISS-456-2000 for mix considerations/acceptance criteria shall be complied with.

(u) The time between mixing of concrete at manufacturer’s yard and transportation

and delivery at site shall not be more than 1 ½ hours. In case longer time is unavoidable the same can be permitted by Garrison Engineer adopting using admixtures all as permissible as per IS without any extra cost to the Govt.

Delivery ticket for truck should show cement content used by the manufacturer type of cement, admixture used and locations of concreting etc.

(v) RMC shall be supplied as per IS 4926-2003 and concrete cube shall be casted

as per IS-456-2000. Minimum quantity of cement shall be as per provision of IS: 456-2000 meeting the requirements from durability point of view and the details regarding proper training and works quality control shall be in accordance with IS:456-2000 and IS:4926-2003. However, if extra quantity of cement is used for whatever reasons, the same shall be at no extra cost to Government.

6.5.2 BLANK 6.5.3.A ESTABLISHMENT OF RMC PLANT AT SITE

If any contractor wishes to establish his own RMC plant at work site, he will be allowed to establish fully computerized RMC plant without any price adjustment provided the contractor has got following T & P and provisions catered in IS-4926 are complied toto :-

(a) Fully automatic computerized concrete batching and weighing plants as per IS: 4925 and 4926 of minimum capacity of 12-15 cum/hr including aggregate hoppers, cement & admixture silos, water tank etc. (b) Transit mixer for mixing and transporting concrete from batching plant to work site. (c) Concrete pumping arrangement suitable for pumping concrete at required level which should essentially include concrete hopper, adequate length of pipe line, pumps.



PS Clause 6.5.3.A.Contd/.. (d) Material feeding arrangement such as conveyer belt etc suitable for constantly supplying the aggregate into batching plant hoppers. (e) A well equipped laboratory having all arrangement for testing all ingredients of concrete as well as tests on plastic and hardened concrete as per relevant IS requirement. (f) Any other T&P required for production and placement of RMC as per IS-: 4926 :-

(i) The permission for establishment of RMC plant by contractor at site shall be accorded by the CWE after duly verification that complete plant machinery & set up brought out here-in-above is functional and capable to deliver desired quality concrete as per IS- 456-2000. (ii) Initial setting on the computerized panel of RMC plant shall be sealed by the GE as per the approved mix design. In case of army change/variation in the source of ingredients of the concrete mix, GE shall only be authorized to re-set the readings of the computerized RMC plant as per the revised approved mix design. GE shall also ensure the tamper proof arrangements for settings of various components of the RMC plants. (iii) In case of break down of RMC plant established by the contractor, he shall arrange RMC of required specification from the approved RMC manufacturer mentioned here-in-before without any extra cost to the Govt. The contractor should note that at no stage during execution, the progress of work should suffer in case of any break down of the RMC plant installed by him.

(g) All other requirements given here-in-before shall remain applicable whether the RMC is procured from RMC manufacturer or from the RMC plant established at site. 6.5.4 MIXING (OTHER THAN RMC): All concrete shall be mixed in mechanical concrete mixer. Where only small quantity of cement concrete is involved, hand mixing may be adopted if approved by the Engineer-in-Charge. The contractor should arrange to wash out and clean the mixing drum on completion of work and or on stoppage of work if stoppage is for more than 20 minutes. 6.5.5 BLANK



6.5.6 TRANSPORTING, DEPOSITING AND COMPACTING (other than RMC) Transporting depositing and compacting generally shall be carried out as specified in Clause 4.11.9, 4.11.10 and 4.11.11 of SSR Part I. 6.5.7 PROTECTION AND CURING OF CONCRETE This shall be carried out in accordance with specifications, given in clause No. 4.11.13 and 4.11.14 of MES Schedule Part I. 6.6(A) FORM WORK 6.6(A).1 All Form work used in the work shall be of steel plates and steel props . However, deformed steel sheets shall not be permitted for use as form work. Form work shall be approved by GE before casting of concrete. For circular or other special work, GE may permit wooden form work as on required basis. 6.6(A).2 Surfaces of concrete which are required to be plastered as indicated above after removal of form work shall be hacked out closely to prepare surface for plastering. 6.6(A).3 For the purpose of pricing the deviation involving form work (both omit and add) the rates given in MES Schedule Part II for fair finished surface for concrete using wooden form work shall be applicable. 6.6(A).4 Provide steel props/spans / bracings of sufficient strength such as ACROW

props, ACROW spans from ACROW Indian Ltd. Bombay or similar as approved by the Garrison Engineer. Use of conventional wooden ballies (Posts), struts are not permitted.

6.7 STRIPPING TIME FOR FORM WORK : The contractor’s attention is invited to the stipulation in Clause 4.11.6.3 regarding stripping of form work. The periods stipulated therein are for concrete using ordinary Portland cement. 6.7(A) CURING AND MINIMUM PERIOD FOR STRIKING OF FORM WORK WITH

POZZOLANA CEMENT USED: 6.7(A).1 Where Pozzolana Cement used for RCC works in various locations, the minimum period for curing and striking of form work shall be as under in lieu of that specified in clause in 4.11.6.3 of MES SSR Schedule Part-I: (a) Curing - Structural RCC Works ,PCC Works, Plastering, etc : 14 days (b) Striking of Form Work - Walls, Columns and vertical sides of beams: 3 to 4 days (c) Slabs (Props left under) : 8 days (d) Beams, soffits (Props left under) : 9 days (e) Removal of Props to slab/beam :

(i) Spanning upto 6m span : 16 days (ii) Spanning beyond 6m span : 22 days (f) Cantilever portion of slab form work with support shall be retained until the completion of the casting of the entire frame work of the building. 6.7(A).2 In case of bad weather, periods mentioned above may be revised at the discretion of the Engineer-in-Charge. The contractor shall be deemed to have considered the above provisions before tendering and quote lumpsum accordingly. No claim will be entertained if longer periods required for striking off the form work and curing and all such effected matters is looked into upon the use of Portland pozzolana cement. 6.7(A).3 Curing shall be carried out using pump of suitable capacity at no extra cost to the Govt. all as directed by Engineer-in-Charge. 6.8 BLANK 6.9 FINISH TO CONCRETE SURFACE: Finish to exposed surface of all concrete works shall be as specified below :-

a) Exposed surface of RCC lintels, beams, pardi walls, Parapets columns etc, which are continuous with the adjoining plastered surfaces of walls shall be plastered, specifications of plaster being same as that adopted for wall plastering. Plaster shall be applied all over the exposed surfaces of such concrete including projected portion of columns, beams/brackets etc. b) Exposed RCC/Concrete surfaces such as soffits of floor/roof slabs, chajjas, canopies, parapets etc shall be finished fair and even by plastering as specified in Clause 4.11.16.2 (b) of SSR Part I. In addition, soffits of floor/roof slabs shall also be treated with Sagol finish as directed by the Engineer-in-Charge.



c) Exposed surfaces of concrete other than those referred above shall be finished as specified in clause 4.11.16.2 (a) of SSR Part I.

6.10 BEARING PLASTER AND WATER PROOFING PAPER Provide bearing plaster and building paper as per Notes on TD drawing for Notes on RCC work and to the following specifications:-

(a) Plaster shall be 20 mm thick in cement mortar (1:4) finished even and smooth without using extra cement. Sand shall be same as specified for plaster to walls.

(b) Water proofing building paper shall be bituminous impregnated laminated water proof paper complying with the requirements of IS-1398 type II jute lines (not less than 60 grams per square metre) and laps at joints shall be 60 mm minimum.

6.11 SAMPLING AND TESTING OF CONCRETE : 6.11.1 Refer Clause No. 4.11.17 of MES Schedule Part I, which shall be read in conjunction with clause 16 of IS-456. 6.11.2 Tests will be carried out on 15 cm cubes all as per IS-516. Minimum Six cubes per sample shall be supplied by the contractor for testing.

6.11.3 For relatively small and unimportant works even though testing may be waived off by the GE, the contractor shall be responsible to achieve the desired strength of concrete. 6.11.4 The contractor shall provide all necessary materials (including moulds etc) and labour for mixing and casting of cubes, transporting the cubes to the testing laboratory and bringing back the same and any other assistance that may be required for getting the samples tested in the laboratory without any extra cost. The charges for testing of cubes shall be borne by the contractor. The charges for testing of cubes for slump test for compacting factor test or vee bee time test and compressive strength (including transportations if any) shall be as indicated in Appendix ‘D’. 6.11.5 The concrete which is not upto the desire strength shall be rejected and the same shall be made good by the contractor without any extra cost to Government. 6.12 BLANK 6.13 PCC COVING : PCC coving with PCC (1:2:4) type B-0 mixed with integral water proofing compound shall be provided at junction of RCC chajja with wall/lintel/beam to the radius of 75 mm irrespective whether shown or not shown on drawings. Coving shall be 15 cm high on wall and to the full length of chajja. 6.14 BLANK 5.15 FILLETING: Provide triangular filletings to skirting / dado as directed by Engineer-in-Charge with CM (1:3) finished even and smooth without using extra cement. 6.16 CONCRETE PADDING : Padding under bearing of RCC lintels to make up the height of opening in wall wherever required shall be done with PCC (1:3:6) type C-1. PCC blocks shall not be cut to under sized dimension and used to make up the required height in such positions. 6.17 RCC LINTELS: The bearing of lintels shall be 15 cm or effective depth (whichever is more), unless otherwise shown on drawings. 6.18 Lintels (without chajja) for opening not exceeding 1.50 metres clear span may be precast at contractor’s option. However these shall be priced as cast-in-situ lintels in the event of deviation if any. All other lintels and bands shall be cast-in-situ. 6.19 DRIP COURSE/THROATING/WEATHERING: Following works shall be executed whether shown on drawings or not :-

i) Provision of proper drip course and / or throating and weathering to all chajja, roof, cills, coping and the like. ii) All flat surfaces exposed to weather shall be finished with imperceptible slope for smooth run of rain water.(In cases no slope is mentioned in drawings or specified).



6(A).0 STEEL AND IRON WORK 6(A)1 GENERAL

All steel required for the work under the contract shall be procured, supplied and incorporated in the works by the contractor under his own arrangement.

6(A).1.1 Grade and Quality Steel supplied by the contractor shall conform to the following grades and quality:- a) Steel for concrete reinforcement

Irrespective of what is indicated/shown on drawing reinforcement bars shall be High Strength TMT Bars produced by Thermo Mechanical Treatment process (TMT steel bars of grade Fe 500D) meeting all the requirements of IS 1786.

b) Structural Steel i) Structural Steel of Standard Quality shall conform to IS-2062 and Grade E 250 (Fe 410 W quality ‘A’). This type of steel shall be provided for all structural steel works in the locations mentioned in drawings and in clause 10.4.1 of MES Schedule Part I. ii) Structural Steel “Ordinary Quality” shall be used in guard bars, grills and like and shall conform to E 165 (Fe 290). This type of steel shall be provided in the locations specified in drawing and in clause 10.4.2 of MES Schedule Part- I.

c) Hard drawn steel wire fabric for concrete reinforcement / Fabric reinforcement shall conform to IS-1566. d) Galvanised steel sheets (Plain and Corrugated), shall conform to IS-277

and having minimum zinc coating of 120 gm per Sqm, Gde ‘B’ corrugation. Note. : Any items of steel specified in clause No. 8.1.1 (a) to (d) above not conforming to grade and quality shall be rejected and the rejected steel items under the particular consignment shall be removed from the site by the Contractor at his own cost within 7 (Seven) days. The contractor will have no claim whatsoever on this account.

6(A).1.2 SOURCE OF PROCUREMENTS (A) REINFORCEMENT STEEL (TMT BARS) (a) Reinforcement bars shall be high strength TMT bars produced by Thermo

Mechanical Treatment process(TMT bars of grade FE – 500D) meeting all the requirement of relevant IS. The contractor shall procure TMT Bars produced from micro alloyed billets directly from main producer/ manufacturer as SAIL/RINL/TISCO/Other primary producers as approved by E-in-C’s Branch. The name of the main producers are as under : (i) Steel Authority of India Limited (SAIL). (ii) Rastriya Ispat Nigam (RINL). (iii) Tata Iron & Steel Company (TISCO or Tata Steel). (iv) M/s Shyam Steel Industries Ltd. (v) M/s Jai Balaji Industries Ltd. (vi) M/s SRMB Srijan Pvt Ltd. (vii) M/s Jindal Steels and Power Ltd. (viii) M/s Steel Exchange India Ltd. (ix) M/s SPS Steels Rolling Mills Ltd. (x) M/s Concast Steel & Power Ltd. (xi) M/s Adhunik Metaliks Ltd. (xii) M/s Shri Bajrang Power & Ispat Ltd. (xiii) M/s JSW Steel Ltd. (xiv) M/s Electrosteel Steels Ltd.(xv) M/s Shyam Metalics & Energy Ltd. (xvi) M/s Kamachi Industries Ltd. (xvii) M/s BDG Meatal & Power Ltd. (xviii) M/s Gallant Metal Ltd. (xix) M/s Rashmi Metaliks Ltd.

Contd…/-



(B) STRUCTURAL STEEL: The contractor shall procure all structural steel directly

from the main producers namely SAIL/RINL/TISCO/other primary producers as approved by E-in-C’s Branch. However, in case of non availability of structural steel with main producers as above structural steel can be procured from approved secondary producers as given in table below from Ser No (i) to (v) with a reduction of 5% (Five percent) of the accepted rates of structural steel. In case the desired section of structural steel is not rolled/ manufactured by main producer, there shall be no price adjustment for use of structural steel procured from approved secondary producers.The contractor shall submit non availability/non manufacturing certificate duly signed by the authorized representative of Main producers.

(i) M/S Kashi Vishwanath Steel

Ltd, Kashipur, A-80, Vivek Vihar Phase-I, Delhi – 110095

(ii) M/S Shri Badrinarain Alloys and steel Ltd 95, Stephen House, 4 B B D Bag, Kolkata-700001, Tel:033 2220, 5381/ 2248 1601, Fax -033 22488664

(iii) M/S KL Steel Pvt Ltd Post Box No 61, Lal Kuan, Bulandshahar Road, Gaziadabad (UP). 2867917 (FAX NO - 0210 )

(iv) Amba Shakti Ispat Ltd, Plot No 6, Phase-II, Industrial Area, Kala Amb, Distt Sirmour- 30

(v) Pushpak Steel Industries Pvt Ltd, Gate No 119, Alandi Markal Road, Dhanore, Tah Khed, Pune

(C) Non structural steel as for guard bars, hold fast, railing, grill, chowkhat etc

galvanized steel sheets and structural steel where total requirement under the contract is less than 5.00 tonnes may be procured from authorised dealers of main producers after obtaining permission of the Accepting Officer in writing.

(D) The contractor shall produce original vouchers from main manufacturer’s and

secondary producers in case of structural steel when allowed due to non availability with main producer for the total quantity of steel supplied, under each consignment. The original vouchers shall be kept on record of the GE duly defaced by Engineer-in-Charge and authenticated.

(E) Steel sections for railing, gates (other than Hanger gates), fencing, guard bars,

grills, steel chowkats hold fasts etc which don’t constitute structural members can be procured from main producers, secondary producers/BIS marked manufacturers or their authorised dealers without any minus price adjustment. Tests will not be insisted upon for such steel sections.

(F) Galvanized iron sheets and fabric reinforcement for concrete to be supplied by

the contractors shall be ISI marked and shall be procured from main manufacturers viz SAIL, RINL, TISCO as brought out in para 6(A) 1.2 (A) (a) hereinabove.

Contd…/-



6(A).1.3 TESTING AND TEST CERTIFICATE (a) The contractor shall produce manufacturer’s Test certificate in original along

with the test sheet giving the result of each mechanical test as applicable and the chemical composition of the steel supplied as specified in relevant IS codes, duly signed by the manufacturer with each consignment.

Note: Production of the test certificate in respect of steel required for guard bars, hold fasts, grills and like by the contractor may not be insisted upon.

(b) The original test certificate shall also be kept on record in the office of GE duly

defaced by Engineer-in-Charge and authenticated

(c) In addition to production of test certificate as mentioned in clause 6(A) 1.3 (a) and (b) above, the contractor shall also provide all facilities to the department for independent testing of steel in Government approved Laboratories without any extra cost to the department.

6(A).1.4 Minimum frequency of testing for each source and each consignment

a) Steel for concrete reinforcement:

i) Bar size : One sample (3 specimens) for less than 10 mm dia each test for every 25 tonnes or part

thereof. ii) Bar size : One sample(3 specimens) for for dia 10mmto16mm(inclusive) each test for every 35 tonnes or part

thereof.

iii) Bar size : One sample (3 specimens) for each over 16mm dia test for every 45 tones or part thereof.

b) Structural Steel: i) Tensile test : One test for every 25 tonnes of

steel or part thereof. ii) Bend test : One test for every 10 tonnes of steel or part thereof.

NOTE :- For various tests, Acceptance criteria, tolerance etc., refer to Steel supply/Acceptance form as per Annexure ‘A’ in and relevant BIS codes. c) Chemical Test: Chemical test shall be carried out to ascertain chemical composition, which shall conform to the norms laid down in relevant IS-Codes. d) Bend test and tensile test for structural steel shall be carried out as per IS-2062. For high strength deformed bars tensile, bend test and rebend test shall be done as per IS-1786. For MS bars tensile and bend test shall be carried out as per IS-432. (e) Minimum percentage elongation for TMT bars of grade Fe-500D shall be 18%. e) GE has the right to get one more sample (3 specimen) tested if he is not satisfied with the consignment. However testing charges for the additional sample over and above frequency given here-in-above above shall be borne by the department. f) All testing charges shall be borne by the contractor in case the test results as per manufacturers test certificates or of independent testing of random samples are not as per criteria laid down in the approved laboratory / test house. However in any case cost of transportation of samples (to and fro) to the approved laboratory and all testing charges shall be borne by the contractor.

Contd…/-



6(A).1.5 RING TEST FOR TMT BARS: - Ring test for the nitric acid and methanol

for 24 hours immersion shall be carried out for all diameters of TMT bars as specified in IS and as directed by GE.

6(A).1.6 STORAGE Steel supplied by the Contractor shall be stored in accordance with the requirement of ISS. Each grade and quality of steel shall be stored separately and have identification tacks indicating the source, quality and grade. 6(A).1.7 PRESERVATION AND MAINTENANCE OF STEEL

The steel brought by the contractor shall be preserved to ensure that no rusting takes place till it is incorporated in the works.

6(A).1.8 SCHEDULE OF SUPPLY

The contractor shall procure the steel sections, timely as required in accordance with CPM chart, agreed between GE and the contractor. Memorandum of understanding (MOU) has been signed by dept with SAIL (one of the main producer of steel) for supply of steel for MES works to contractor based on their demand directly to the firm. In case contractor faces difficulties in procurement of steel from primary producer, he shall contact GE who will in term will help him in procurement of steel from primary producers. The contractor will forfeit his right to demand extension of time if the supply of steel got delayed due to his failure in placing order in time to the manufacturer/supplier.

6(A).1.9 PAYMENT

Receiving payment of steel shall be governed by in accordance with condition 64 of IAFW-2249. Payment shall be allowed only after production of test certificate and purchase vouchers from main manufacturer/producer.

6(A).1.10 MEASUREMENT

The entire quantity of steel brought to site shall be recorded in Measurement Book “NOT TO BE ABSTRACTED” indicating the reference to manufacturer, source of supply, voucher number, and test certificate before incorporation in the work and shall be signed both by the Engineer-in-Charge and the Contractor. Proper documentation/record shall be maintained as per the instructions on the subject.

6(A).1.11 WEIGHT CONVERSION

Weight of steel supplied by the contractor shall be calculated at unit weights given in ISI conversion table or manufacturer’s certificate shall be followed if the weights are not available in ISI tables.

6(A).1.12 Normal waste and off cuts shall be stacked neatly which shall be the property

of the contractor. Contractor shall be allowed to remove such cut pieces after inspection and certification by the Engineer-in-Charge.

6(A).1.13 Advance on account of payment made towards these cut pieces shall be

recovered from advance on account of payment immediately falling due and before removal of such cut pieces from site.

6(A).1.14 Bending and fixing of bars for concrete reinforcement including mild steel wire

for binding shall be carried out all as specified in MES Schedule

Contd…/-



6(A).1.15 Hooks shall be provided only for mild steel bars. In case of cold twisted/ deformed steel bars ends shall be bent instead of hooks as shown on drawings/specified in relevant IS.

6(A).1.16 Binding wire for reinforcement shall be mild steel wire (annealed) of size not less than 0.9 mm.

6(A).1.17 STEEL SUPPLY/ACCEPTANCE FORM For each consignment of steel supply/acceptance form will be filled in and jointly signed by the department Rep. (AGE/ JE) and contractor and accepted/rejected by GE before incorporation in the works as per Annexure ‘A’.

Annexure ‘A’ STEEL SUPPLY/ACCEPTANCE FORM

1. CA No and Name of work : 2. Consignment No. : 3. Name of Manufacturer : 4. Manufacturer’s TC No : 5. Random test details (a) Physical test report from …………………………..vide letter No……………… (Name of NABL approved Lab/Govt Engg College) (b) Chemical test report from…………………………..vide letter No………………. 6. Type of steel, dia & Qty : (a) Type : TMT/CRS (b) Dia : mm (c) Actual Wt : MT (d) Conversion Wt : MT

Chemical test Mechanical test

Carb

on %

Sulp

hur

%

Phosp

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us

%

Sulp

hur

+ P

hosphoru

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Mangan

ese

%

Sili

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Corr

osi

on r

esi

stant

ele

ment

Weig

ht

per

mete

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Yie

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tress

(N

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Tensi

le S

treng

th (

N/m

m2)

Perc

ent

elo

ng

atio

n (

Min

18

%)

Ben

d test

Rebe

nd T

est

Rem

ark

s

As per IS-1786 2008

As per manufacturer’s test certificates

As per independent test

Remarks of Inspecting Officer/CWE : 6(A).2 WORKMANSHIP: Workmanship shall be as specified in MES schedule as

applicable. 6(A).3 WELDING: Welding shall be in accordance with Clause 10.15 of SSR Part I. 6(A).4 STEEL REINFORCEMENT: Provide reinforcement as shown on drawings in

accordance with clauses 10.17 of SSR Part I, (as applicable). Notes on drawing and Notes on RCC work will be followed in further reference to MES Schedule.



6(A).5 STRUCTURAL STEEL WORKS 6(A).5.1 Structural steel work like steel trusses, base plate, holding down bolts, with

anchor plates, purlins, runners, bracing etc shall be all as showing on drawing.

6(A).5.2 All fabrication except bolting shall be done at site of works. Fabrication/ erection shall be carried out all as specified in IS-800 1962 and to a good engineering practice.

6(A).6 BOLTS NUTS WASHERS

6(A).6.1 Bolts and nuts shall be of grade ‘Black’(B). 6(A).6.2 Standard mild steel bolts for steel stanchions and other works shall be

procured by the contractor under his own arrangement. Steel for the bolts to be procured by the contractor shall conform to IS:1363–1984 and 6639-1972 and test certificates either from manufacturers or from approved laboratories will be produced on demand.

6(A).6.3 The bolts heads shall be forged in one piece with the shank and nuts shall be

neatly made with the holes truly in the centre. The threads shall be full, true and deep and the type of threading shall be white worth standard. Anchor plates shall be welded to the holding down bolts all as shown on drawings.

6(A).6.4 Irrespective of what is shown on drawings, provide one standard washer

alongwith nut for each holding down bolts and two number standard washers for other bolts, (i.e. one number alongwith the bolt and one No alongwith the head ) For bolting, also refer clause 10.14 of SSR Part I.

6(A).6.5 The washers shall be tapering washers when the bearing surfaces of the nuts

on the steel surfaces are closing as in the cases of flanges of channels and RSOs.

6(A).7 COMPONENT MEMBERS All component members shall be neatly fabricated according to dimensions on respective drawings. A marking diagram allotting district identification work to such separate piece of steel work shall be prepared to ensure correct assembly and erection at site.

6(A).8 HOLES Marking, drilling of holes shall be carried out all as specified in clause 10.11 of SSR Part- I.

6(A).9 CUTTING AND MACHINING

6(A).9.1 Cutting of Members and Machining shall be carried our all as specified in

clause 10.10 of SSR Part-I.

6(A).9.2 Shorting, cropping and gas cutting shall be clean, reasonably square and free from distortion and if it not so, the edges shall be grounded, without any additional payment.

6(A).10 CONNECTIONS

All connections of steel work shall be welded except where bolting is specifically shown on drawing.

Contd…/-



6(A).11 JOINTS 6(A).11.1 The joint surfaces shall be prepared as specified in the relevant IS. Machining

need not be done and no price adjustment will be made for this. 6(A).11.2 Every member shall be in one piece without joint.

6(A).12 FABRICATION AND ERECTION 6(A).12.1 Fabrication of all components shall be carried out exactly in accordance with

the detailed drawings and with the best workmanship. Steel work shall be trial fitted by the contractor to ensure accuracy of various components. Any work failing to fit accurately at site will liable to be rejected by the GE.

6(A).12.2 Contractor’s particular attention is drawn to IS-7705-1982 for safety during

erection. 6(A).13 WELDING 6(A).13.1 Refer clause 10.15 of SSR Part I, All welding shall be metal arc welding using

consumable electrodes. All fillet welds shown on the drawings shall be normal fillet welds.

6(A).13.2 Welding electrodes shall be of quality suitable to be used for welding of structural steel and shall comply with the requirement of IS-814-1991 for covered electrodes, for metal are welding of mild steel.

6(A).13.3 The work shall be positioned for down hand welding wherever practicable. 6(A).13.4 Joints surfaces shall be smooth, uniform and free from laminations and such

other defects which adversely affect quality of weld and workmanship.

6(A).13.5 All welds shall be cleaned of slag and other deposits after completion. 6(A).14 HOLDFASTS & BOLTS: Provide Holdfasts as indicated on drawing.

Holdfasts shall be tarred and sanded before fixing. Where holdfasts are required to be provided through concrete column etc, same shall be bolt type as shown on drawings.

6(A).15 EXPANDED METAL Expanded metal wherever specified for incorporation shall be of weight not exceeding 4 Kg per Sqm cut to length, bent to shape and shall be tied with and including annealed mild steel wire not less than 0.9 mm dia or shall be fixed with galvanised steel staples all as shown on drawings and directed by Engineer-in-Charge.



7.0 PLASTERING AND POINTING 7.1 GENERAL

7.1.1 Plastering shall be carried out all as described in respective items of BOQ.

7.1.2 The thickness of the plaster mentioned is the minimum thickness above the

protruded part of masonry and is exclusive of thickness of key. Dubbing if required is deemed to be included in the plaster work and nothing extra shall be paid.

7.1.3 Blank 7.1.4 Mortar for plastering work/pointing may be machine mixed or hand mixed at the

discretion of the contractor. 7.1.5 Preparation of mortar for plastering and pointing indicated here-in-after shall be

as per Clauses 14.13 and 14.13.3 of SSR Part I.

7.1.6 The preparation of surface and application of plaster shall be as per Clause

14.14 of SSR Part I as applicable to new work.

7.1.7 The junction of skirting/dado and plaster shall be as directed by Engineer-in- Charge/specified herein after.

8.0 PAINTING 8.1 GENERAL 8.1.1 Painting shall be of quality not inferior to those required by the relevant IS and

as per Clause 17.2 of SSR Part I.

8.1.2 Workmanship and preparatory works shall be as per Clause 17.6 of SSR Part I as applicable for new works. Priming coat shall be redone if more than six months have lapsed before executing the under coat.

8.1.3 The final finish of paint shall be glossy suitable for, internal / external use as approved by the GE. Galvanised steel articles (sheet, pipes etc and wire cloth) and builders hardware shall be left untreated. All coats of paint shall be synthetic enamel paint and shall be obtained from any one of the manufacturers listed in Appendix ‘C’ and shall be of first grade/first quality. Exposed surface of all steel and wood items shall be painted with two coats of synthetic enamel paint over a coat of primer unless otherwise specified elsewhere.

9.0 ROADS AND PATH: The work of road & path shall be carried out all as specified in schedule ‘A’/BOQ & as specified hereinbelow:-

9.1 MATERIALS a) Stone metal for soling (or bottoming), water bound macadam & stone chippings for premix carpet shall be of trap stone obtained from approved quarries & shall conform to the sample kept in the office of GE as mentioned here-in-before. Stone metal for soling(or bottoming) shall be clean, sound hard. It shall be reasonably free from lamination & unsound fragement free from decay and weathered stuff. Stone metal for soling (or bottoming) shall be of crushed/broken stone. The soling (or bottoming) shall be of guage not exceeding 80 mm all as per sample kept in sample from of GE referred here-in-before.



b) Stone metal for WBM shall be crushed or broken stone aggregate of size ranging from 63 to 40 mm as specified in grading No.2 in clause No. 20.A.3 of SSR Part-I. It shall be hard & durable & shall be free from excess of flat, elongated, soft and disintegrated particles dirt, & other objectionable matter. c) Moorum/approved soil shall be used as screening in WBM. Moorum/approved soil shall be as specified in clause 20.A.7.6 of SSR Part-I. Stone chippings for premix carpet shall be as per clause 20.A.5 of SSR Part-I.

9.2 BLANK 9.3 COLLECTION AND STACKING OF MATERIALS : (i) The materials shall be stacked on the side of the road and clear of the road. Stacks shall be uniformally distributed along road. The collection of materials shall be completed for the entire work or for a complete stretch as directed by Engineer-in-Charge. Aggregates shall not be stacked unless they have been screened by gmaye and free from all the deleterious matter such as earth, rubbish etc. or any such rejected materials. The rejected materials shall be removed immediately from the site of work. Measurements shall not be taken until sufficient materials have been collected and all rejected material has been removed.

(ii) The contractor shall ensure that his transport vehicles do not drop any aggregate, moorum, sand etc on the road and shall keep screens or sieves of proper sizes at the site of stacks to enable the Engineer-in-Charge to carryout checks regarding sizes of the materials brought are as desired.

(iii) The contractor’s representative and Engineer-in-Charge shall jointly record measurements of the stack in the ‘MEASUREMENT BOOK’ (NOT TO BE ABSTRACTED) and check the quantities brought for the work.

(iv) The details like truck/dumper No, size of dumper, date, time etc in respect of bituminous macadam brought from the plant shall also be recorded in the ‘MEASUREMENT BOOK’ (NOT TO BE ABSTRACTED) and check the quantities brought for the work.

9.3A ROLLING : As soon as sufficient length has been spread with the premix the surface shall be rolled with 8 to 12 tonne power roller all as specified in SSR 2009 clause No. 20A.27.5.

9.4 GRANULAR SUB BASE (GSB) :- 9.4.1 Gradation of Aggregate, Physical properties, procedure for spreading and compaction shall be considered and executed as per BOQ and as mentioned in section 400, Sub clause 401.1 to 401.7 of MORTH, IRC specification. 9.4A WET MIX MACADAM (WMM) 9.4.1A Gradation of Aggregate, Physical properties procedure for spreading and compaction shall be considered and executed as per BOQ and as mentioned in section 406, Sub clause 406.1 to 406.9 of MORT&H, IRC specification. 9.5 BITUMEN: Bitumen for binder, priming coat / tack coat, seal coat, carpet, macadam and asphaltic concrete shall be paving bitumen conforming to IS-73-1961. The bitumen shall be IS grade VG-10 and VG-30. The bitumen Maybe brought at site either in sealed containers or in bulk in bouncers at the contractor’s desecration and no price adjustment shall be made on this account. Contractor shall produce paid voucher for the total quantity consumed in the work and shall be entered in the MB (NOT TO BE ABSTRACTED).



The contractor shall procure the bitumen from manufacturers listed below and produce original paid vouchers for the total quantity of bitumen supplied under each consignment and to be incorporated in the work. The original vouchers shall be kept on record of the GE duly defaced by Engineer-in-Charge. Quantity of bitumen brought at site shall be entered in the MB with reference to vouchers as ‘Not to be abstracted’. Bitumen supplied shall be in packed containers. While calculating the quantity of bitumen used in the work weight of container shall not be taken into account. (i) Indian Oil Corporation. (ii) Bharat Petroleum Corporation Ltd (iii) Hindustan Petroleum Corporation Ltd 9.6 STONE CHIPPINGS : stone chippings for premix bituminous carpet shall be as per Clause No 20-A.5.1 of MES Schedule Part-I course aggregate for bituminous carpet shall be all as specified in clause No 20-A.5.1 of MES schedule Part-I. NOTE mentioned in SSR clause 20-A, 5.1 shall not be applicable to this work. 9.7 QUANTITY OF MATERIAL REQUIRED FOR TACK COAT AND CARPET : Quantity of stone chipping and binder required for 10 Sqm of road surface for tack coat and carpet shall be as given in Clause No. 20-A.27.9 of MES Schedule Part-I. 9.8 COLLECTION AND STACKING OF MATERIALS :

(i) The materials shall be stacked on the side of the road and clear of the road. Stacks shall be uniformally distributed along road. The collection of materials shall be completed for the entire work or for a complete stretch as directed by Engineer-in-Charge. Aggregates shall not be stacked unless they have been screened by gmaye and free from all the deleterious matter such as earth, rubbish etc. or any such rejected materials. The rejected materials shall be removed immediately from the site of work. Measurements shall not be taken until sufficient materials have been collected and all rejected material has been removed. (ii) The contractor shall ensure that his transport vehicles do not drop any aggregate, moorum, sand etc on the road and shall keep screens or sieves of proper sizes at the site of stacks to enable the Engineer-in-Charge to carryout checks regarding sizes of the materials brought are as desired.

(iii) The contractor’s representative and Engineer-in-Charge shall jointly record measurements of the stack in the ‘MEASUREMENT BOOK’ (NOT TO BE ABSTRACTED) and check the quantities brought for the work.

(iv) The details like truck/dumper No, size of dumper, date, time etc in respect of bituminous macadam brought from the plant shall also be recorded in the ‘MEASUREMENT BOOK’ (NOT TO BE ABSTRACTED) and check the quantities brought for the work.

9.9 BLANK 9.10 BLANK

9.11 BITUMINOUS MACADAM AND SEMI DENSE ASPHALTIC CONCRETE :-

(i) BITUMEN :- As specified herein before.



(ii) COARSE AGGREGATE:- Coarse aggregate for bituminous macadam shall be graded aggregate obtain from approved local quarries and conforming to IS-383. The grading of the aggregate shall be as given in relevant para as applicable. Coarse aggregate shall be crushed stone aggregate retained on 2.36 mm sieve and shall consist of angular fragments clean, tough and durable rock, free from disintegrated pieces or organizer deleterious material and adherent coating. The aggregate shall satisfy the following physical requirements :-

Sl No

TEST BITUMINOUS MACADAM

SEMI DENSE ASPHALTIC CONCRETE

i Flakiness when tested in accordance with IS 2386 Part I

15 25

ii Crushing Value 45 30 iii Aggregate impact value when tested

up to as per IS-2386 Part IV 30 30

iv Los Angeles Abrasion Value 25 25 v Stripping test as per IRC 27 25 25 vi Water Absorption Test 1 1

(iii) FINE AGGREGATE:- Fine aggregate shall be the fraction passing 2.35 mm sieve and retained on 75 micron sieve, consisting of crushed screenings from approved stone or naturally occurring coarse sand. It shall be clean, hard, durable un coated and dry, free from injurious, soft or flaky pieces and organic deleterious substance.

(iv) FILLER: Filler for bituminous macadam shall be crushed basalt stone dust the whole of which passes through 300 micron sieve. Care shall be taken to ensure that dust thrown by plant through dust collector is not used as filler.

9.12 DESIGN CRITERIA FOR BITUMINOUS MACADAM AND SEMI DENSE ASPHALTIC CONCRETE :- (i) The following criteria for mix design shall be adhered to during execution :- Sl No

PARAMETER BITUMINOUS MACADAM


i Number of Compaction blows each end of Marshall Specimen

75 75

ii Marshal stability in Kgs. 545 (Minimum) 820 (Minimum) iii Flow value (mm) 2 - 4 2 - 4 iv % Void in Mix (to prevent bleeding) 10 -15 5 - 7 v % of air void in miniral aggregate

filled with bitumen 33 - 43 65 - 72

vi Binder Content % by weight of total mix

4.5 - 6 4 - 7.5

Note : (aa)The quantity of binder has been indicated in Schedule A item

However, after the mix design exact quantity shall be used as per designed binder content. In order to satisfy the above mentioned requirements, the mix shall consist of coarse aggregate, fine aggregate and filler in suitable proportion and with sufficient binder content.



(ab)True and representative samples of the aggregate likely and proposed to be used in the work shall be tested in the laboratory and the proper blend of the aggregate shall be worked out so that the gradation of the final composition will satisfy the limits set in the following Table :-

Sl No

SIEVE SIZE. PERCENTAGE PASSING BY WEIGHT BITUMINOUS MACADAM


i 25mm 100 100 ii 20mm 70-100 75-100 iii 12.5mm 45-60 - iv 10 mm 35-60 45-70 v 4.75mm 15-35 30-50 vi 2.36mm 5-20 20-35 vii 600 micron - 5-20 viii 300 micron - 3-12 ix 150 micron - 2-8 x 75 micron 0-4 1-4

(ac) The grading of aggregates given in the aforesaid Table for bituminous macadam,semi dense asphaltic concrete gives a wide range of variations, for the selection of the aggregates. It is essential that with the available aggregates, a definite grading of the aggregates has to be arrived at and a job mix designed. Once the job mix is arrived at, its characteristics shall be checked with the design requirements. It is desirable that the same grading is adopted throughout the job.

(ad) The exact binder and filler content required shall be arrived at as per marshal procedure for the aggregate gradation worked out in the laboratory.

9.13 JOB MIX :-

(i) While the laboratory mix design gives different proportions of aggregate combination in terms of individual sieve size for actual execution of the work blending of two three or more sizes of aggregate (each size having within it a range of individual sieve sizes) would be necessary. This blending ratio shall be obtained on a weight basis, giving the percent weight and /or volume of one or more of the coarse, fine aggregate and filler fraction needed to give the ultimate aggregate gradation

(ii) This aggregate combination together with the corresponding optimum binder content, as determined in the laboratory shall constitute the job mix formula for adoption during execution of the work.

(iii) The job mix formula as worked out by the department is as given for guidance.

(iv) The job mix formula given hereinbefore is only as a guide so as to help the contractor to take the same into account while quoting his rates. This Maybe varied with the change in materials or if control test given here-in-before indicates variation in design criteria beyond permissible values the revise job mix formula shall be worked out to satisfy the design criteria given here-in-before and to the approval of Engineer-in-Charge, for any variation in the binder content from the mix one given in the job mix formula indicated above.



(v) The blending of various type and size of aggregate shall be done on the basis of the requirement as indicated vide clause No 20.B.2.3.3 here-in-before. The exact binder content shall be worked out and adjustment in the rates shall be made on the basis of designed job formula and indicated binder content.

(vi) Design mix for bituminous macadam and semi dense asphaltic concrete

shall be got done from SEMT, Wing Dapodi, Pune /Govt approved and accredited labs(along with design mix details the contractor will also submit certificate of accreditation issued to concern laboratory and GE will approve the design mix in writing before the execution of the work. Also the bituminous macadam and semi dense asphaltic concrete used shall be tested during execution as per Clause 20.B.4.8 of SSR Part I, Testing charges shall be borne by the contractor. (vii) Approved design mix details including binder content shall be entered as ‘NOT TO BE ABSTRACTED’ in the MB.

9.14 MIXING LAYING AND COMPACTION OF BITUMINOUS MACADAM AND SEMI DENSE ASPHALTIC CONCRETE :- (i) PREPARATION OF UNDER LYING COURSE :- The underlying course shall be prepared shaped and conditioned to a uniform grade and section as specified. Any depression or pot hole shall be properly made up and thoroughly compacted. The surface shall be scraped clean and free from dust and foreign material before applying tack coat. (ii) APPLICATION OF TACK COAT:- The binder shall be heated to its appropriate temperature and applied uniformly over the prepared surface by Mechanical sprayer. The tack coat shall be applied immediately before spreading the mix. The rate of tack coat shall be as specified. (iii) PREPARATION OF THE MIX:- It is imperative that the Bituminous macadam mix is made by using hot mix plants of adequate capacity to yield a mix of proper and uniform quality. The plant Maybe either a batch type or a continuous one having a coordinated set of essential units such as dryer for heating the aggregate, arrangements for grading and batching by weight or volume the required quantities of aggregate binder heating and control unit for metering out of the correct quantity of heated binder together with a paddle mixer for intimate mixing of the binder and aggregates. In case the plant has arrangement for batching by volume only and the mix design worked out and proposed to be adopted by the contractor is on weight basis, necessary conversion of the in gradients shall be done by the contractor to arrive at the corresponding volumetric mix design and approval of the GE obtained. Fine feeder for incorporation of the correct quantity of filler is also a necessary auxiliary. The hot mix plants shall be fitted with temperature measuring device both for aggregate and bitumen. The variation from the specified temperature shall not be more than 10°C on the lower side only.

(iv) SPREADING OF THE MIX :- The mix shall be carried from the mixer by tipper trucks to the place (s) of deposit and spreading done by means of self propelling mechanical paver with suitable screeds capable of spreading, taming and finishing the mix true to grade, line and cross-section without causing, segregation dragging, irregularities or other surface defects and at a speed consistent with character of the machine. The temperature at the time of laying shall be the designed temperature. The mix shall be spread so that required thickness is achieved after rolling. The max consolidated thickness after rolling shall not be more than 50mm in one layer. The work shall not be allowed to progress if the spreading is done manually due to failure of the mechanical paver. The mix shall be spreading such a manner that after consolidation, the required levels and camber etc of bituminous macadam is obtained.



(v) COMPACTION: - The mix after spreading shall be thoroughly compacted by rolling by set of rollers, at a speed not more than 5 km/hr immediately following by paver. The initial rolling shall be with 8-12 ton, wheeled roller and surface finished by final rolling with 8-12 ton tandem roller. The wheel of roller shall be kept moist and rolling shall commence longitudinally from the edge and progress towards centre. The roller shall proceed on the fresh material with a rear or fixed wheel leading so as to minimize the pushing of the mix and each pass of the roller shall overlap the proceeding one by half the width of roller. (vi) CONTROLS :- At least one sample for every 100 tons of bituminous mix discharged at the pug mill chute or one sample/day shall be collected and following test should be done :-

(i) Three marshal specimen to be compacted and tested for average stability, flow, void ratio and density and shall be as per designed values. (ii) Binder to be extracted form about 1000 gm of mix and binder content determined.

The permissible variation of various ingredient shall be as per following table.

Sieve Size Dense A/C Semi-ense 4.75mm sieve …… .. .. 2.36 mm sieve…… + 5% + 5% Passing 2-36 mm sieve and retained on 75 micron…..

+ 3% + 3%

Size of mineral finer < than 75 micron..

+ 1% + 1%

Binder content ……. 0.3% + 3%

Field density ….. Not less than 98% lab density (vii) CONTROLS ON LAID THICKNESS :- After the mix is compacted, the thickness shall be checked by noting the depth of penetration of hot scale. Except cross the crown off camber or change with the finished surface of the wearing course is to such regularity that when tested with 3 meter straight edge placed any where in any direction there shall not be a gap greater than 3mm between the bottoms of edge and surface any where. Any depression or protrusion shall be rectified immediately. (viii) OPENING AND TRAFFIC: - Traffic Maybe allowed immediately after completion of the final soling when mix has cooled down to the surrounding temperature. (ix) ROLLING - After spreading of the mix, rolling shall be done by 8 to 10 tonne power roller. 9.15 BLANK 9.16 WATER:- Quality of water to be used for mixing and curing of concrete work shall conform to the requirement of clause No 5.4 of IS-456. GE and contractor will ensure that testing of water is carried out at three months intervals to comply with the requirement. Cost of testing of water will be borne by the contractor. The CWE will monitor quality of water through test results to ensure that the water used for making concreted or mortar and for curing conform to IS-456.



9.17 SAND CUSHIONING: Sand shall be clean river sand from the sources approved by GE. Sand cushioning shall be done as specified in Clause 19.75 of SSR Part-I. 10.0 SPECIFICATIONS FOR MISC ITEMS OF SOLAR POWER PLANT 10.1 SCOPE OF WORK : This Contract covers all works described in BOQ special conditions and particular specification. 10.2 SPV Modules:

i. Individual SPV modules to be supplied shall have minimum declared output of 325 Wp or more at standard test conditions.

ii. The V-I curve of each PV module with Sl. Nos. should be submitted along with Modules meeting the required specifications.

iii. Identification and Traceability: Each PV module used in must use a RF identification tag. The following information must be mentioned in the RFID used on each module. This must be laminated inside the panel and it must be able to withstand harsh environmental conditions.

(a) Name of the manufacturer of PV module (b) Name of the manufacturer of Solar cells (c) Month and year of the manufacturer (Separately for Solar cell and module) (d) Country of origin (Separately for Solar cell and module) (e) I-V curve for the module (f) Wattage, Im, Vm and FF for the module (g) Unique Serial No and Model No of the module (h) Date and year of obtaining IEC PV module qualification certificate (i) Name of the test lab issuing IEC certificate (j) Other relevant information on traceability of Solar cell and module as per ISO

9000 series. iv. Entire drawings, detailed test reports obtained from the manufacturer of the

offered modules should be submitted for approval of GE CME within 30 days from the date of placement of module order and supply should start thereafter.

v. PV Array Configurations:The Solar array shall be configured in multiple numbers of sub-arrays, providing optimum DC power to auditable number of sub arrays. The Contractor shall submit their own design indicating configuration of PCU and respective sub arrays and bill of material. vi. Stabilized output of the Solar Power Plant should not be less than 5.0 MW AC,

under Standard Test Condition after one year of operation. vii. Peak power point voltage and the peak power point current of any supplied

module and/or any module string (series connected module) shall not be more than 3% from the respective arithmetic means for all modules and/or for all module strings, as the case may be.

viii. Each module shall have low iron tempered glass front for strength & superior light transmission. It shall also have tough multi-layered polymer back sheet for environmental protection against moisture & provide high voltage electrical insulation.

ix. The module frame shall be made of anodised aluminium or corrosion resistant material, which shall be electrically compatible with the structural material used for mounting the modules.

x. Solar modules offered shall be certified as per IEC 61215-Edition -II, IEC 6164, IEC 61730-1 & 2 and IEC 62108 amended up to date or equivalent Indian Standard.

xi. All materials used shall have a proven history of reliability and stable operation in external applications. It shall perform satisfactorily in relative humidity up to 100% with temperatures between -10° C and +50° C and should have lowest temperature coefficient and shall withstand gust up to 200 km/h on the surface



of the panel. Each and every SPV module shall be checked for conformity with relevant standard and no negative tolerance shall be accepted.

xii. SPV module shall contain Crystalline high power silicon solar cells. The solar cell shall have surface anti-reflective coating to help to absorb more light in all weather conditions.

xiii. Solar PV module array shall consist of high efficiency Solar Modules utilizing Crystalline Solar PV cells. Power output Guarantee offered for the SPV Module shall not be less than 25 years.

xiv. Crystalline power cells shall be used in the Solar Photovoltaic module. Solar module shall belaminated using lamination technology using established polymer (EVA) and Tedlar/Polyesterlaminate.

xv. The solar modules shall have suitable encapsulation and sealing arrangements to protect the silicon cells from the environment. The arrangement and the material of encapsulation shall be compatible with the thermal expansion properties of the Silicon cells and the module framing arrangement/material. The encapsulation arrangement shall ensure complete moisture proofing during life of the solar modules.

xvi. All materials used shall be having a proven history of reliable, light weight and stable operation in external outdoor applications and shall have service life of more than 25 years.

xvii. Module rating is considered under standard test conditions, however Solar Modules shall be designed to operate and perform under site condition including high temperature, dust. The Geological data for Kirkee, Pune should be referred for design to get optimum generation.

xviii. Solar PV Module design shall conform to following Mechanical requirement: (a) Toughened, low iron content. (b) High transmissivity front glass. (c) Anodized Aluminium frame (d) Ethyl Vinyl Acetate (EVA) encapsultant (e) Silicon edge sealant around laminate (f) Tedlar/Polyester trilaminate back surface (g) Weatherproof DC rated MC connector and a lead cable coming out as a

part of the module, making connections easier and secure, not allowing for any loose connections.

(h) Resistant to water, abrasion, hail impact, humidity & other environment factor for the worstsituation at site.

xix. Each module shall have low iron tempered glass front for strength and superior light transmission. It shall have back sheet for environment protection against moisture and high voltage electrical insulation.

xx. Modules shall be provided with a junction box with provision of external screw terminal connection and with arrangement for provision of external & adequate capacity by-pass diode. The box should have hinged, weatherproof lid with captive screws and cable gland entry points.

xxi. The fill factor of module shall not be less than 0.70 (typical). The V-I curve of each PV module with Sl. Nos. should be submitted along with Modules meeting the required specifications.

xxii. Minimum following parameters should be provided in the detail documents:

(a) Maximum Power : Pmax

(b) Minimum Power : Pmin

(c) Open Circuit Voltage : Voc

(d) Short Circuit Current : Isc

(e) Voltage at Max Power : Vmp

(f) Current at Max power : Imp



(g) Fill Factor : FF

(h) Efficiency of cell : ŋc

(i) Efficiency of module : ŋm

10.3 Power Conditioning Unit (PCU)

i. Power Conditioning Unit (PCU) is critical equipment in Grid Connect SPV Power plant. This equipment converts DC power generated by SPV array, into 3 phase AC voltage to be connected to Grid. It also provides necessary protections for Grid Synchronization and Data Logging/Monitoring. MPPT controller, inverter (Minimum100KW or higher) depends on array formation and associated control and protection devices etc. all shall be integrated into PCU. They should convert DC power produced by SPV modules, in to AC power and adjust the voltage & frequency levels to suit the local grid conditions.All inverters shall be located in the central control room mandatorily.

ii. MPPT controller, inverter and associated control and protection devices etc. all shall be integratedinto PCU.

iii. The DC energy produced has to be utilized to maximum and supplied to the DC bus for inverting toAC voltage to extract maximum energy from solar array and provide 415VAC/ (+15% to - 10%), 3-ph 50Hz through 3 winding transformer with secondary voltage of 22kV to synchronise with local grid. (Ref SLD).

iv. The PCU shall have protection features such as, over current, short circuit, over temperature to namea few.

v. The PCU shall be designed for continuous, reliable power supply as per specification.

vi. The PCU shall be designed to be completely compatible with the SPV array voltage and gridsupply voltage.

vii. The dimension, weight foundation details etc. of the PCU shall be clearly indicated in the detailed technical specification.

viii. It shall have user friendly LEDs/LCD display for programming and view on line parameters such as:

(a) DC power input, (b) DC input voltage, (c) DC current, (d) AC power output, (e) AC voltage (all the 3 phases and line) (f) AC current (all the 3 phases and line) (g) Power factor (h) Inverter on (i) Grid on (j) Inverter under voltage/over voltage (k) Inverter over load (l) Inverter over temperature.

ix. The PCU shall have arrangement for adjusting DC input current and should trip against sustainable fault downstream and shall not start till the fault is rectified.

x. Both AC&DC lines shall have suitable fuses/breaker and contactors to allow safe start up and shut down of the system.

xi. Fuses used in the DC circuit shall be DC rated. xii. The PCU shall have provision for input & output isolation. Each solid-state

electronic device shall have to be protected to ensure long life of the inverter as well as smooth functioning of the inverter.

xiii. The PCU shall be capable of complete automatic operation, including wake-up, synchronization & shut down.



xiv. PCU shall be capable to synchronize independently & automatically/ to be phase locked to the Local grid power line frequency to attain synchronization and export power generated by the solar panel to grid.

xv. Built in with data logging to remotely monitor plant performance through external PC shall be provided (PC shall be provided along with SPV Plant).

xvi. Inverter shall be tested for islanding protection performance. xvii. Protections:

(a) Over voltage both at input & output. (b) Over current both at input & output. (c) Over/under grid frequency. (d) Over temperature. (e) Short circuit. (f) Protection against lightening. (g) Surge voltage induced at output due to external source.

xviii. Typical failure analysis report of PCUs and recommended list of critical components shall be provided by the Contractor.

xix. The PCU shall be capable of operating in parallel with the grid utility service and shall be capable of interrupting line fault currents and line to ground fault currents.

xx. The PCU shall be able to withstand an unbalanced load conforming to IEC standard and relevant Indian electricity condition. The PCU shall include appropriate self protective and self diagnostic features to protect itself and the PV array from damage in the event of PCU component failure or from parameters - beyond the PCU’s safe operating range due to internal or external causes. The self-protective features shall not allow signals from the PCU front panel to cause the PCU to be operated in a manner which may be unsafe or damaging. Faults due to malfunctioning within the PCU, including commutation feature, shall be cleared by the PCU protective devices and not by the existing site utility grid service circuit breaker.

xxi. The PCU shall go to shutdown/standby mode, with its contacts open, under the following conditions before attempting an automatic restart after an appropriate time delay. When the power available from the PV array is insufficient to supply the losses of the PCU, the PCU shall go to standby/shutdown mode. The PCU control shall prevent excessive cycling of shut down during insufficient solar radiance.

xxii. Galvanic isolation is required to avoid any DC component being injected into the grid and the potential for AC components appearing at the array.

xxiii. Disconnection of the PV generator in the event of loss of the main grid supply is to be achieved by inflicts protection within the power conditioner. This may be achieved through rate of change of current, phase angle, unbalanced voltages, or reactive load variants.

xxiv. Detailed technical description of the complete unit of offered PCU should be furnished as per clauses of “completion time” mentioned in contract document for approval of CME. Following Technical documents of PCU shall be supplied for approval after placement of order.

(a) Detailed technical description of the complete unit (b) Instructions for installation and operation (c) Electrical diagrams of all internal cabling, necessary for installation,

maintenance and fault finding. (d) Description of electrical and mechanical characteristics of units. (e) Maintenance and fault finding& trouble shooting procedures. (f) Safety precautions. (g) Software for data monitoring with detailed description. (h) Details of data acquisition (i) Factory test reports in details on various parameters. (j) All maintenance requirements and their schedules, including detailed

instructions on how to perform each task.



(k) Detailed schematics of all power instrumentation and control equipment and subsystems along with their interconnection diagrams. Schematics shall indicate wiring diagrams, their numbers and quantities, type and ratings of alt components and subsystems.

(l) A detailed bill of materials which shall list components model numbers, quantities and manufacturer of each supplied item.

(m)All documents and write ups shall be in English. They shall be clean and legible, and must be checked, signed, approved and dated by a competent representative of the contractor.

xxv. The Contractor shall provide data sheet for PCU as per manufactures specification.

xxvi. Make And Type Of Inverter :

The CONTRACTOR shall provide Inverter of either of the following makes:

a. ABB b. SCHNEIDER ELECTRIC c. DELTA d. TMEIC e. HITACHI

10.4 DC Bus & Panel (combiner Box) DC generated by the solar modules is transmitted through the appropriate cables from Array Yard to Control Room. DC bus & Panel should be provided or the incoming DC supply from Array Yard. The Panel should consist of adequate size DC Bus/Cable which can handle the current and the voltage safely as per the relevant IS standards. DC panel should be equipped with an adequate DC circuit breaker along with control circuit, Protection and equipment for input to remote monitoring of each string, array parameters. Contractor should submit design calculations and detailed explanations along with drawings for approval of GE CME as per clause(C) of “COMPLETION TIME” mentioned in contract document. All features mentioned above can be clubbed in Power conditioning unit to satisfy mentioned functions. 1.1 Data monitoring of power plant The performance and generation data is recorded using a data logger. The monitoring system shall comprise of the following main components:

(a) PCU to log the inverter performance data and transmit the same to the Data logger.

(b) Data logger gathers information and monitors the performance of the inverter. It shall supports measurements from external sensors. Computer and other accessories required shall also be in the scope of this tender.

(c) PC Data logging software should enable automatic long-time storage of measured data form PV-Plant. It should allow visualization, monitoring, commissioning and service of the installation.

(d) Communication interface the entire system can be operated and monitored via various interface viz. (RS485), in addition to the information indicated on the operator panel. Link shall be provided between SCADA &Corporate office of GE CME.



1.2 CONSTRUCTIONAL FEATURES MAIN Distribution board i. It shall be Metal enclosed, indoor, floor mounted, modular type, dust, vermin

proof, of uniform height (not more than 2100 mm) in Single front as specified. Neoprene gaskets shall be provided all around the perimeter of adjacent panels, panel and base frame, doors and removable covers. The module shall be provided with door operable by a handle. Door fixed by screwed knobs are not acceptable. All the switchboards shall be suitable for bottom cable entry.

ii. The panels shall be fabricated out of 3.15 mm thick cold rolled sheet steel. Stiffeners shall be used where ever necessary. Panels shall be provided with fabricated base channel. The panels shall have adequate provision for grouting on foundation. The angles, channel used in the panels shall be fabricated out of 10 gauge sheet steel. All doors shall be fabricated out of 12 gauge sheet steel.

iii. The construction of switchgear shall conform to a degree of protection of IP: 4X as per IS 2448. All doors, removable covers, Gland plates and joints between adjacent sections shall be gasketed all around with neoprene gaskets. Lifting facilities to be provided for each shipping section. Switchgear shall have readily accessible terminals for making connections to external equipment. Suitable shrouding shall be provided for all incoming & outgoing terminals. The bottom most row of equipment mounted in the panel shall be at least 250 mm, above bottom cover to facilitate repair and maintenance. Power and control terminals shall be segregated. All equipment shall have permanent identification labels.

iv. Panel shall be divided into distinct vertical sections each comprising of metal enclosed horizontal bus bar compartment, individual feeder module in multitier arrangement, enclosed vertical bus bars, vertical cable alley (minimum 250 mm wide, horizontal separate enclosure for auxiliary power and control bus, space heater with thermostat.

v. Each shipping section shall have metal sheets on both sides. vi. All doors shall be with concealed type hinges and captive screws. The doors

shall be operable by a handle. Door fixed by screwed knobs are not acceptable.

1.3 MAIN & AUXILIARY BUSES i. Bus bars shall be of uniform cross section throughout the length and made of

high conductivity Aluminium alloy of E 91 E grade. ii. Busbar shall be fully insulated with close fitting heat shrinkable sleeve and

adequately supported to withstand stresses developed due to short circuit. Supports shall be of glass reinforced phenolic material or cast resin. All bus bar joints shall be shrouded.

iii. Space heaters shall be provided in each cable alley and provided with MCB/thermostat. The space heater supply shall be derived from the incoming supply and distributed throughout the switchgear through Auxiliary bus bars.

iv. Earth bus of 75 x10mm GS flat shall run throughout the length of the switchgear.

v. All hardware used in Busbar connections shall be electro-galvanised. All busbar connections shall be provided with spring washers.

vi. Switchgear controls shall be through the UPS supply. The control bus shall run throughout the length of the panel and shall be made of same material as main busbar.



1.4 WIRING AND TERMINAL BLOCKS i. The wiring shall be carried out with PVC insulated, 650/1100 V grade, flexible

stranded tinned copper conductor wires. The following minimum sizes shall be used. (a) Power circuit : 2.5 mm2 (b) Control circuit : 1.5 mm2 (c) C.T. circuit : 2.5 mm2

ii. The control circuit wires shall be provided with identification ferrules at both the ends.

iii. The terminal blocks for control circuit shall be Elmex clamp on type. The terminals for the C.T. circuit shall be disconnecting and short circuiting type.

iv. The power terminals for out going connections shall be bolted type. All the power terminal blocks should be provided with nickel cadmium coated bolts.

v. Nut & bolts including metallic shall have to be adequately protected against atmosphere and weather prevailing in the area.

10.5 DC CABLE

DC cables shall comply following specifications and standard EN 50618.

The construction of the cable should be as follows Conductor Tinned fine copper strand according to VDE 0295 / IEC 60228, class 5 Insulation XLPO, flame-retardant, halogen free, electron-beam cross-linked Jacket XLPO, flame-retardant, halogen free, electron-beam cross-linked, UV and ozone resistant, with white or red marking and stripe. Jacket colour – black The photovoltaic system with a rated value U0 = 1.5 kV DC. The electrical values sould be as Rated value U0= 1500 V DC (max. permitted voltage U01800 V DC) Test voltage 11 kV AC 50 Hz

10.6 0.38/22kV Step Up Transformers

2.5 MVA transformer shall be used for 5.0 MW AC SPV Power Plant. Transformer shall be connected to Interface panel through suitable cables.The Contractor shall furnish Guaranteed Technical Particulars as per Data Sheet. The detail specification of step up transformer is as under-

a. General Requirements:

The intention of the specification is to provide information for the design of the above mentioned transformers to be fully suitable in every respect for the functions designated. It is required that the CONTRACTOR agrees to furnish all apparatus, appliance and material whether specifically mentioned or not, but which may be found necessary to complete, perfect, or test any of the herein specified units in compliance with the requirements implied in this specification.

1. All terminal screws, studs, nuts and bolts shall be in accordance with the Indian Standards.

2. All electrical and mechanical equipment shall be designed and manufactured so that no damage will result from transportation, installation and operation of the equipment under the climatic conditions to which it will be subjected.

3. All materials used shall conform to this specification and appropriate standards and shall be new in all respects.



(b) Standards:

The transformers, their accessories and fittings, transformer oil, etc. shall conform to the latest edition of the following standards (as amended up to date) except where specified otherwise in this specification:

(a) Transformer. : IS -1180 Part-1 : 2014 and BEE certified

(b) Transformer oil. : IS:335/93

(c) Bushings. : IS: 2099, 3347,8603

(d) Fittings and accessories for transformers. : IS:3639

(e) Code of practice for selection installation & maintenance of transformer.

: IS:10028

(f) Guide for loading of oil immersed transformers. : IS:6600

(g) Method of impulse voltage testing : IS:2070

(h) Gas & Oil operated Relay. : IS:3637

(i) Specifications for insulating kraft paper. : IS:9335:

(j) Specifications for solid insulating press Boards for electrical purposes.

: IS:1576

(k) Ready mixed paint, brushing zinc chromate, painting

: IS:104

(l) Determination of water content in oil for porcelain bushing transformers.

: IS:2362

(m) Dimensions for clamping arrangements for bushings.

: IS:4257

(n) Selection, Installation and maintenance of transformers: Silica-gel

: IS:3401 and IS:10028

(o) Terminal Connector : IS:5561:

(p) Gas & Oil operated Relay. : IS:3637:

(q) Method of impulse voltage testing : IS:2070:

c. Electricity Rules Act & Rules:

All work shall be carried out in accordance with the latest edition of the Indian Electricity Act and rules formed there under and as amended from time to time.

d. Type And Rating:

(a) The transformers shall be of copper wound 2.5 MVA, 0.38/22kV, 3 phase, natural cooled, double wound, core type construction, oil immersed and shall be suitable for outdoor service as step-up transformers ( At times however these may be required to work under reversal of power also).

(b) The transformers covered by this specification are to run in parallel with transformers which are being installed or will be installed in future (for same rating) and as such the characteristics of the transformers covered in this specification for the sub-station will be identical so as to enable these transformers to run in parallel. The technical particulars of transformers required are as under:

(i) Maximum continuous rating at reference ambient temperature specified

: 2.5 MVA

(ii) Frequency : 50 Hz



(iii) No. of phases : 3 phase

(iv) Rated primary Voltage on principal tap : 22 kV

(v) Rated secondary Voltage : 0.380 kV as per inverter LV

(vi) Winding connections: :

a. HV side : Delta

b. LV side : Star

c. Vector group reference : Dy11y11 (typical)

(vii) Type of cooling : ONAN

(viii) Percentage impedance at normal voltage & 75 Deg.C average winding temperature between HV-LV with tolerance as per ISS.

: 4.5 % As per inverter OEM

(ix) Off load tap changer : Having 9 equal steps (in step of 2.5% of each to have voltage variation of ±10% on HV side Also match the range of requirement of HV voltage viz-a-viz Inverter output voltage.

(x) Maximum. current density for HV & LV : 3 Amp/mm sq (for Cu winding incl. tapped winding wound)

(xi) Neutral unbalance current : Not exceeding 2.0%

(xii) Type of terminal : HV side: Suitable cable for inter connection

LV Side: Suitable for connecting LT Cables

b. Efficiency:

The percentage loading for the maximum efficiency shall be clearly stated at unity power factor as well as 0.8 and 0.9. Pf.

c. Insulation:

1. The dielectric strength of the winding, given insulation and the bushings shall conform to the values given in IS: 2026 ( latest IS) for highest system voltage of 22 kV, 1.1 kV and shall be suitable for the following impulse test\power frequency test voltages.



SR.

NO.

SYSTEM Voltage

HST.SYSTEM voltage

IMPULSE TEST Voltage

PF TEST Voltage

i. 22kV 24 kV 125 kVp 50 kV

ii. 415 kV 1.1 kV - 2.5 kV

d. Temperature Rise:

Each transformer shall be capable of operating continuously at their normal rating without exceeding temperature rise limits as specified below:

Type of cooling.

Temp.rise External cooling medium (Air)

Winding( Temp. rise measured by resistance method)

ONAN 50 degree C. When the oil circulation is natural non directed

Oil (Temp. rise measured by thermometer method)

As above. 45 degree C. -

The reference temperature conditions for which the transformers shall be designed are as per the climatic conditions of the site as specified. The hottest spot temperature shall not exceed 98degree C when calculated over an annual weighted average ambient temperature of 35 degree C when transformer is loaded to its rated MVA. The transformer shall be capable of being over loaded in accordance of relevant IS. Bushing and its terminal connectors shall have minimum continuous current rating corresponding to 120% rated current of transformer at lowest tap.

e. Guarantees:

The Contractors are required to offer the transformers having no load losses and load losses not exceeding the following values as per CBIP manual.

(a) No load loss at rated voltage, Rated current, rated frequency AS PER IS 2026

(b) Load loss at rated current, rated Voltage, rated freq. and 75 Deg.C.

f. Cooling :

(a) Transformer shall be provided with ONAN type cooling.

(b) The ONAN cooling of the transformers shall be by natural circulation of air while the circulation of oil shall be effected by natural convection, the maximum oil flow being assured by a method whereby the return flow of cooled oil is made to enter the tank at a level coinciding with the bottom of the hot columns of oil thus avoiding centre heads of cold oil at the bottom of the tank. Out flow shall be arranged to coincide as nearly as possible with the hot oil level at the top of the tank so that the total available difference will be fully employed in circulating the oil round the shortest possible paths.

(c) The windings of the transformers shall be designed to deliver continuously rated KVA corresponding to ONAN cooling. Radiators shall be provided for cooling purpose. These shall be directly mounted on the tank on both sides in a balanced manner & not on one side only.



g. Transformer Core:

(a) The core shall be built up with thin lamination of high grade, non ageing, low loss, high permeability, cold rolled, grain oriented silicon steel specially suitable for transformer core. The particulars of laminated steel to be employed shall be furnished along with DC magnetization, B-H and iron loss curves.

(b) If required after being sheared the laminations shall be treated to remove all burrs and shall be re-annealed to remove all residual stresses. At least one side of each lamination shall be coated with a double baked enamel insulation coating which will not deteriorate due to pressure and the action of hot oil. The nature of insulation shall be specified.

(c) Every care shall be exercised in the selection, treatment and handling of core steel to ensure that as for as practicable, the laminations are flat and the finally assembled core is free from distortion.

(d) The design of the magnetic circuit shall be such as to avoid discharges, development of short circuit paths within itself or to the earthed clamping structure and the production of flux components at right angles to the plane of the laminations which may cause local heating.

(e) The core shall be rigidly clamped to ensure adequate mechanical strength and to prevent vibration during operation. The core/clamping bolts shall not pass through Core/Yoke and clamping structure shall be so constructed that eddy currents will be minimum.

(f) The core shall be provided with lugs suitable for lifting the complete core and coil assembly of the transformer. The core and the coil shall be so fixed in tank that shifting will not occur when the transformer is moved or during a short circuit.

h. Flux Density:

The flux density in any part of the core built from cold rolled grain oriented steel shall not exceed 16000 lines per sq. cm. at any tap position necessary to maintain No-load terminal voltage of 415 V on LV side as required. Due regard shall also be given to limiting the flux density based on the characteristics of the material used. Over flux in the core shall be limited to 12.5% of rated value to ensure that core does not get saturated in the event of over voltage to the extent of 12.5%. The core step section and flux density calculation shall be furnished.

The magnetizing current at rated voltage shall not exceed 2% of full load current and at 112.5% of rated voltage shall not exceed 4% of rated full load current. The above values are maximum& no tolerance shall be allowed.

i. Suppression of Harmonics:

The transformer shall be designed with particular attention to the suppression of harmonics voltages especially in the third and fifth harmonics so as to eliminate wave form distortion and any possibility of high frequency disturbances.

j. Winding:

(a) The copper windings shall be so designed that all coil assemblies of identical voltage ratings shall be inter changeable and field repairs to the windings can be made readily, without special equipment. The coils shall be between adjacent sections by insulating spacers and bracers. Bracings and other insulation used in the assembly of the windings shall be arranged to ensure a free circulation of the oil and to reduce hot spots in the windings. The windings shall be designed to reduce to a minimum the out of balance forces in the transformer at all ratios. The double paper covering insulation shall be used in HV &LV coils.



(b) The insulation of the coils shall be suitable to develop the full electrical strength of the windings. All materials used in the insulation and assembly of the windings shall be insoluble, non catalytic, and chemically inactive in the hot transformer oil, and shall not soften or otherwise be adversely effected under the operating conditions.

(c) All threaded connections shall be provided with locking facilities. All leads from the windings to the terminal board and bushings shall be rigidly supported to prevent injury from vibration. Guide tubes shall be used where practicable.

The windings shall be clamped securely in place so that they will not be displaced or deformed during short circuits. The assembled core and windings shall be vacuum dried and suitably impregnated. The Copper conductor used in the coil structure shall be best suited to the requirements.

(d) The material used for insulation and coils shall be of best quality and if desired, invoices and manufacturers test certificates shall be furnished. All permanent current carrying joints in the windings and the leads shall be welded or braced except compression type which may be used for terminal connections. Bolted connection may be used at the bushings and at terminal board with suitable locking device. The drying out procedure of the core coil assembly shall be indicated.

k. Fault Withstanding Capacity of Windings:

All the windings shall be suitably designed to withstand short time rating for not less than 3 seconds. The maximum temperature attained for short time rating shall not exceed 250 degree C.

l. Insulating Oil:

(a) The oil for first filling shall be supplied with each transformer. The oil shall be EHV grade and shall comply relevant IS with latest amendments.

(b) Particular attention shall be paid to deliver the oil for topping up free from moisture having uniform quality throughout in the non-returnable new steel drums.

(c) The quantity of oil for first filling of each transformer shall be stated. Quantity of oil required for filling of conservator and radiators shall also be stated.

m. Tank :

(a) The transformer tank and cover shall be fabricated from good commercial grade low carbon steel suitable for welding and of adequate plate thickness. The tank and the cover shall be of welded construction. All seams shall be welded and where practicable they shall be double welded. The transformer tank shall have sufficient strength to withstand without permanent distortion.

(b) At least one manhole/inspection cover with a welded flange and a bolted cover shall be provided on the tank cover. The manhole shall be of a sufficient size to afford easy access to the lower ends of the bushings, terminals etc.

(c) All bolted connections to the tank shall be fitted with suitable oil tight gaskets which shall give satisfactory service under the operating conditions. Special attention shall be given to the methods of making the hot oil tight joints between the tank and the cover as also between the cover and the bushing and all other outlets to ensure that the joints can be remade satisfactorily and with ease , with the help of semi-skilled labour. Where compressible gaskets are used, steps shall be provided to prevent over compression. Suitable guides shall be provided for positioning the various parts during assembly or dismantling.

(d) Lifting eyes or lugs shall be provided on all the parts of the transformers requiring independent handling during assembly or dismantling. In addition the transformer tank shall be provided with lifting lugs and bosses properly secured to the sides of the tank, for lifting the transformer either by cranes or by jacks.



(e) The design of the tank, the lifting lugs and bosses shall be such that the complete transformerassembly filled with oil can be lifted with the use of these lugs without any damage ordistortions. The tank shall be provided with two suitable copper alloy lugs for the purpose ofgroundings.

(f) The main body of the tank shall have sufficient strength to withstand and without permanent distortion

(i) A vacuum of 760mm of mercury.

(ii) Continuous internal gas pressure of 0.7 atmospheres above atmosphere pressure with oil at operating level i.e. the transformer tank should be able to withstand 100% vacuum and also one atmosphere pressure above atmosphere internal pressure.

(g) The tank cover shall be belled to the tank and the transformer design shall be such that at the tank will not split between the lowest and upper cooler connections.

(h) The exterior of transformer tank shall be thoroughly given one primary coats & twofinishing coats of durable oil and weather resistant paints of enamel. The colour of the finishing coats shall be dark admiralty grey confirming to colour code number of relevant IS.

n. Under Carriage:

(a) The transformer tank shall be supported on a structural steel base equipped with forged steel or cast steel, flat uni-directional rollers suitable for moving the transformer completely filled with oil. The rollers should be of Cast Iron with mild steel mounting arrangement and also mild steel axle with mild steel split pin. The surface of roller should be machined and axle should be of round shape.

(b) Pulling eyes shall be provided to facilitate moving the transformer and they shall be suitably braced in a vertical direction so that bending does not occur when the pull has a verticalcomponent.

o. Off Load Tap Changer Mechanism:

(a) The off circuit tap changer (OCTC) shall be of high quality and robust in construction. It shall be located at a convenient position so that it can be operated from ground level by a standing operator. The handle of OCTC shall be provided with a locking arrangement. Thus enabling the OCTC to be locked in position. Arrangement for indicating of tap position shall also be provided. It shall be suitable for local manual operations. The tap changer shall be capable of permitting parallel operation with other transformer of the same type. When one unit is in parallel with another of same type, the tap changer shall not become out of step.

(b) The OCTC shall be capable of carrying rated MVA on all taps. The breaking capacity of the OCTC shall be compatible with the highest system voltage and current based on maximum over loading permissible under IS: 6600 -1972 (150% of rated this) Step voltage of OCTC shall not be less than 115% of 2.5% of the nominal phase voltage of the HV winding and rated through current of OCTC at this voltage will not be less than 150% of rated current of HV winding at lowest tap.

(a) Conservator:Oil preserving equipment shall be conventional conservator tank type. The minimum oil level in the conservator tank shall not be below the level of the bushing flanges.

Oil conservator tank shall be located well clear of the bare connection of the transformer terminals. The conservator tank shall have adequate capacity between highest and lowest permissible levels to meet the requirement of expansion of the total cold oil volume in the transformer and cooling equipment from min. ambient temperature to highest oil temp. as per desired.



(b) The total volume of the conservator shall be min.10% of the total quantity of oil in transformer .The inside diameter of the pipe connecting the conservator to the main tank shall be min.50mm and it should be projected into the conservator in such a way that its end is projected 30mm above the bottom so as to create sump for collection of impurities.The min. oil level should be above the sump level.

(c) A conservator complete with sump and drain valve shall be provided in such a position as not to obstruct the electrical connections to the transformer, having a capacity between highest and lowest visible levels to meet the requirement of expansion of the total cold oil volume in the transformer and cooling equipment from the minimum ambient temperature shall be with 0 Deg. C to 90 Deg.C. The minimum indicated oil level shall be with the feed pipe from the tank covered with not less than 15mm depth of oil and the indicated range of oil level shall be minimum to maximum.

(d) The oil connection from transformer tank to the conservator vessel shall be arranged at arising angle of 3 Deg. to 9 Deg. to the horizontal up to gas and oil actuated relay and shallconsist of 50mm inside diameter pipe.

p. Bushings:

(a) All main winding and neutral leads shall be brought out through outdoor type bushings. The electrical characteristics of bushing shall be in accordance with IEC-137 as well as relevant IS. The bushing shall be rated for highest voltage and current rating of the respective windings. The current ratings of bushing shall be at least 150% of the rated current at minimum tap to permit overloading.

(b) The bushings shall have high factor of safety against leakage to ground and shall be so located as to provide adequate electrical clearances between bushings and between the bushings and ground parts. The spacing between the bushings shall be adequate to utilize full flashover strength preventing flashover between the phases or betweenphaseand groundparts under all conditions of operation. The creepage distance shall not be less than 25 mm per KV.

(c) All bushings shall be equipped with suitable solder less terminals of approved type. The typeand size shall be specified. All external current carrying contact surfaces shall be placedadequately.

(d) Bushings of identical voltage ratings shall be interchangeable.

(e) All porcelain used in bushings shall be of the wet process homogeneous impervious to moisture and free from cavities or other flaws and throughout verified and smoothly glazed. The glazing shall be of the uniform colour and free from blisters, burns and other defects. All bushings shall have puncture strength greater than the dry flashover voltage.

q. Centre of Gravity.

The centre of gravity of the assembled transformer shall be low and as near the vertical centre line as possible. The transformer shall be stable with or without oil.

r. Fittings and Accessories:

Each transformer shall be provided with the following fitting and accessories in accordance as specified in IS: 2026.

(a) 150 mm dial type thermometer for oil, a dial type indicating thermometer with maximum pointer of robust pattern mounted in the marshalling box of the transformer at a convenient height to read the temperature in the hottest part of the oil and fitted with alarm and trip contacts. Adequate thermometer pockets shall also be provided on the transformer tank.



(b) Two winding temp indicators, One for HV and other for LV winding. Current transformer for WTI shall have secondary current of rating of 2 Amp.

(c) One oil drain cum sampling valve for main tank with plug or core plate of suitable size withlocking arrangement.

(d) One filter valve located at the top of the tank on the LV side. The opening of this valve shallbe baffled to prevent aeration of oil.

(e) One filter valve located near the bottom of the tank on the HV side of the transformer.

(f) Air release device. It shall be of adequate capacity and shall be provided to release thetrapped air during/after filling of the oil.

(g) Explosion vent (with diaphragm /Pressure release device)

(h) One No. double float Buchholz relay shall be provided with alarm and tripping contacts todetect accumulation of gas and sudden changes of oil pressure, complete with shut-off valves on either side and flange coupling to permit easy removal without lowering oil level in the main tank, a bleed valve for gas venting and a test valve. The Buchholz relay shall be of best indigenous make having ISI certification.

(i) Detachable radiators complete with shut off valves as necessary for cooling

(j) An oil conservator having detachable end plates, with following provisions.

(i) Magnetic type oil level gauge with low level alarm contacts.

(ii) One oil filling hole with plug and drain valve on the conservator.

(iii) One prismatic oil level gauge having painted/embossed marking as min., normal, and max. Oil level.

(iv) Silica gel breather with Oil seal and dehydrating agent.

(k) Eye bolts and lugs on all parts for ease of handling.

(l) Two grounding terminals

(m) Rating, Diagram and terminal marking plates :

Rating, diagram and terminal marking plates of stainless steel or brass for transformers and other accessories giving details as per ISS-2026 shall be provided. Value of full wave (1.2/50 micro second) impulse level, short circuit current, its duration, weights of all important items, Impedances, loss values at normal/extreme taps and Postal address. Performance guarantee shall also be indicated.

(n) All transformers shall have the marking in paint on the body for identification as per Indian Standard or as instructed by purchaser. Further, the following should be embossed at the top of the tank cover.

(i) Sr. No. of the transformer. (ii) The details of P.O. i.e. Order No. & Date. (iii) Name of the firm. (iv) Month and year of manufacture.

(o) Bimetallic terminal connectors for HT & LT cable termination.

(p) Suitable weather proof cubicles (Marshalling box) for housing the local control equipment for fans, terminal blocks, for current transformer secondary’s and for mounting winding temperature indicators and oil temperature indicator as (i) and (ii) above.



(q) Triple pole type off load tap changer.

(r) Rollers:

Transformers shall be provided with four numbers of flat uni-directional / Bi directional rollers.

(s) Skids

(t) Hauling Eyes:

Hauling eyes shall be provided on all the four sides of the transformer base.

(u) Jacking Pads:

Four, sturdy jacking pads shall be provided for lifting complete transformer to enable rotation of its wheels through 90 degree for pulling on transformer tank. Lifting height and safe capacity of jacks shall be specified in Bid.

(v) Lifting Lugs:

Two sets of forged or tested mild steel plate lifting lugs, one set for top cover, core and coil assembly and other set of complete transformer shall be provided. Lifting lugs shall be of adequate strength and size for attaching steel rope slings. Should lugs for lifting complete transformer be located on the base, sling guides shall be provided on cover.

(w) Inspection Covers:

One inspection covers of sufficient size for access to the interior of the tank shall be provided on the cover. The inspection covers shall be provided with suitable lifting arrangements.

(x) OFF CKT Tap Changer.

(y) Axles & Wheels.

All type of valves shall be of gun metal except radiator shut off valves which may be of cast iron/steel. All valves shall be provided either with blind companion flanges or with pipe plugs for protection.

The makes of fitting & accessories will be Specifications as under:-

Sr. No. Fitting & Accessories

(i) Buchholz relay

(ii) Winding Temperature Indicator

(iii) Magnetic type oil level guage

(iv) Radiator Valve

(v) Filter valve & Drain valve

(vi) Oil Temperature Indicator



Radiator valves shall have clear & distinct OPEN/CLOSE indication embossed/ casted as well as painted on the both sides of main body of valve.

s. Factory Assembly And Tests:

The transformer shall be completely assembled and tested at the Factory.

Routine and Acceptance tests as per specification are to be conducted and no deviation in respect of conducting these tests will be acceptable. No extra charges for these tests will be paid. Test charges shall be part of cost of the equipment. If purchaser selects to send a representative, all tests shall be carried out in his presence. Type test certificate shall be furnished before start of supply

t. Routine Tests:

Each completed transformer shall be subjected to following routine tests as per IS: 2026. No extra charges for any of the tests shall be paid. No deviation shall be acceptable. If the CONTRACTOR desires, he may not fix radiators on transformers (other than the one which is to be type tested) during routine testing. However in that case, radiator manufacturer's test certificate shall be furnished for reference of inspecting officer with undertaking that CONTRACTORshall be responsible for proper alignment/fixing of radiator on transformer at site.

1. Measurement of resistance of each winding. 2. Measurement of turn’s ratio between HV-LV windings at each tap. 3. Checking of polarity and phase relation-ships for each winding. 4. Measurement of no load loss and no load current. 5. Positive phase sequence impedance/short circuit impedance between HV-

LV windings on minimum, maximum and normal taps. 6. Separate source voltage withstand test. 7. BDV test on transformer oil. 8. Induced over voltage withstand test. 9. Measurement of neutral unbalance current. 10. Regulation at rated load at unity, 0.90 and 0.80 lagging power factor. 11. Load losses measured at rated frequency by applying voltage sufficient to

produce the ratedrelevant current in one winding with the other winding short circuited.

12. Measurement of insulation resistance. 13. The total losses shall comprise of the No Load Losses, load losses at rated

output dulyconverted at 75 degree C average winding temperature and shall also be indicated in thetest report. Load losses shall be that corresponding to rated load on HV & LV winding.

14. Routine dielectric tests as per IS: 2026. 15. Check complete transformer against approved outline drawing, provision

for all fittings, finish oil level etc.

u. Type Tests:

Type test certificate shall be furnished with tender and before start of supply for approval.

v. Tests at Site

After erection at site all transformer(s) shall be subjected to the following tests:

(a) Insulation resistance test. (b) Ratio and polarity test. (c) Dielectric test on oil.



In case the equipment is not found as per the requirements of the purchase order, all expenses incurred during site testing will be to the tenderer's account and the material shall be replaced by him at site, free of cost.

w. Further Tests:

The OWNER reserves the right of having other reasonable tests carried out at his own expenses either before dispatch or during performance guarantee period from Govt. Approved/ Govt. recognized lab to ensure that the transformer complies with the requirements of this specification after due intimation to the CONTRACTOR. In case the equipment is not found meeting the requirement of Work Order/Contract/ Agreement specification, all expenses incurred for such testing will be on CONTRACTOR’s account and the material shall be replaced by the CONTRACTOR at site free of cost

x. Frequency and System Voltage :

The transformer shall be suitable for continuous operation with a frequency variation of plus minus 3% from normal of 50 cycles per second without exceeding the specified temperature rise. The highest system rated voltage shall be 24KV. However the flux density requirements shall be as per this specification.

y. Drawings:

(a) The drawings and the technical literature list below shall be submitted.

(i) General outline drawings showing front, side elevations and plan views of the transformer and all accessories and external features with detailed dimensions, net and shipping weight, crane lift for undertaking and for erection/ removal of bushing, size of lifting and pulling eyes, HV & LV terminal clearances, live terminal to ground clearances, quantity of insulating oil etc.

(ii) Coreassembly drawing showing complete constructional details and flux densitycalculations & details of insulation.

(iii) Drawings giving details of name plate & terminal marking and connection diagrams.

(iv) Drawings of bimetallic terminal connectors with test certificates.

Thermal / dynamic calculations to provide transformers capability to withstand short circuit under worst conditions.

(b) Any shop work done prior to approval of the drawing shall be at the CONTRACTOR's risk. The CONTRACTORshall make all such changes in the design as are considered necessary to make the equipment conform to the provisions and intent of this specification without any additional cost to the OWNER.

(c) Each drawing shall be identified by a drawings number and each subsequent resubmission/ revision or addition to the drawings or procedure. All drawings shall be thoroughly checked for accuracy and completeness and signed or initialled by a responsible officer of the contractor.

(d) Checking and approval of the drawings by the CONTRACTOR is for the benefit of the CONTRACTOR and shall not relieve the CONTRACTOR of full responsibility for ensuring correct interpretation of design drawings and specifications or for completeness and accuracy of the shop drawings and relevant specifications.



NOTES:

1. The Tolerance in weight and Dimension of the transformer shall not be more than (+/-) 5%.

2. Minimum external electrical clearance after mounting the bi-metallic terminal connectors in position shall be maintained as per relevant standards.

3. Make of each accessories/components shall be clearly and invariably indicated in the bill of material. Further following make(s) of bought out items are acceptable to the department.

a. Bushings. b. Bimetallic terminal connector c. OFF circuit tap changer. d. Oil temperature indicator

However other makes of bought out items are also acceptable, if it is of “ISI mark” or type tested for which Contractor shall furnish attested Photostat copy of valid ISI certificate / type testreport from Govt. approved/ recognized lab. The type test report should not be older than 5 years.

INSTALLATION & COMMISSIONING

Mainly following activities are required to be carried out before commissioning of Power Transformers:-

1. Assembling of Power Transformer accessories.

2. Testing activities in presence of Purchaser such as

a. Ratio Test b. Megger Value c. Magnetic balance. d. Oil BDV e. Earth Resistance f. Bucholz Relay checking. g. WTI/OTI/MOLG (oil level) checking. h. Checking of points of leakage of oil from Transformer body/ Radiator/Valve, i. Setting of Relays in Panel

10.7 Technical Specification Of 22kV Switchgear

3 pole, 50 Hz, 22kV switchgear panels shall be fitted with 22kV vacuum circuit breakers including voltage transformers, current transformers, metering instruments, protection relays etc. The power system is with neutral solidly earthed. The circuit breaker and protective devices shall be of latest design so as to ensure rapid and efficient interruption of fault current, low arc energy, small arcing time, complete phase segregation and freedom from fire hazards.

Standards :

The circuit breaker/metal enclosed switchgear, Voltage transformers, current transformers and all other equipment shall also comply with the requirement of following latest edition of relevant Indian standards. Voltage transformer and current transformers shall be mounted within the panels.



Sr.No.

IS/IEC Reference Specification

(a) IEC-298 : A.C. Metal - enclosed and control gear for rated voltages above 1KV and including 72.5KV

(b) IS-3427 : A.C. Metal - enclosed and control gear for rated voltages above 1KV and including 52KV

(c) IS-8623 : Specification for Low Voltage Switchgear and Control gear assemblies.

(d) IS-13118

IEC-56

: Specification for High Voltage AC Circuit Breakers.

(e) IEC-529 : Degrees of Protection.

(f) IS-5578 & 11353 : Making and arrangement for switchgear bus bar main connections and auxiliary wiring.

(g) IS-325 : Specification for 3 Phase Induction motors.

(h) IS-2629 : Recommended practice for Hot dip galvanizing of iron and steel.

(i) IEC-137 : Bushing for AC Voltages.

(j) IS-3347 : Porcelain Transformer Bushings.

(k) IS-5561 : Terminal Connectors

(l) IS-3156 : Voltage Transformers

(m) IS-2705 : Current Transformers

(n) IS-3231 : Electric relays for power protection.

(o) IS-13779 : Static Energy Meters

(p) IS-8686 : Static Protection Relays

(q) IS-1248 : Electrical measuring instruments

(r) IS-2099 : High Voltage Porcelain Bushings.

(s) IS-10118 : Minimum clearances for Outdoor Switchgear.

(t) IEC-694 : Common Clauses for High Voltage Switchgear and Control gear.

(u) IEC-60255 &

IEC-61330

: Numerical Relays



(i) Particulars of System :

a. Nominal system voltage : 22kV

b. Highest system voltage : 24 KV

c. Frequency : 50 Hz

d. No. of phases : 03

e. Neutral earthing : Effectively Earthed

(ii) Service Conditions :

The equipment should operate satisfactorily under the climatic conditions specified in this specification. The reference maximum ambient Air temperature may be taken as 50Deg. C. as against 40 Deg. C. The permissible temperature rise for various equipment offered should therefore be de-rated accordingly.

Principal Parameters

(a) Circuit Breakers : Rating and characteristics of circuit breakers :

(i) No. of poles : 3

(ii) Class : Indoor

(iii) Rated voltage : 22kV

(iv) Rated insulation level :

a. Lightning impulse voltage : 125 KV (Peak)

b. One minute power frequencywithstand voltage.

: 50 KV (rms)



(v) Rated frequency : 50 Hz

(vi) Rated normal current : 800A

(vii) Short circuit breaking capacity : 40 KA

(viii) Short time withstand current for 3secs. : 40 KA

(ix) First pole to clear factor : 1.5

(x) Protection class : IP 4X

(xi) Maximum opening time : 5 Cycles

(xii) Rated operating sequence : 0-3min-CO-3min-CO

(xiii) Minimum operations at full rated short circuit breaking current.

: 100

(xiv) Rated Breaking Capacity :

a. Symmetrical : 40KA

b. Asymmetrical : As per ISS

(xv) Rated making capacity : 2.50 x 40 KA

(xvi) Operating Mechanism : Motor operated Spring charged closing mechanism.

(xvii) Heater/Lamp/Socket : 240 V AC

(xviii) Control Voltage : 230V AC

(b) Characteristics of the operating mechanism of Circuit breaker and associated equipment :

(i) Method of operation :

The circuit breakers shall be equipped with power operated mechanism to operate all the three phases simultaneously using 220/240Vuniversal motors operated spring closing mechanism or magnetic actuator. The circuit breakers shall also be provided with hand operated spring closing mechanism or magnetic actuator. The Circuit Breaker shall have electrical and mechanical tripping arrangements under various conditions. In case of spring closing mechanism no main spring of the mechanism shall be plated, powder coated or given any other treatment so that spring property is not lost.

(ii) Number and type of spare, auxiliary switches :

Adequate number of spare auxiliary switches/ contacts both of normally open and normally close type but not less than four each shall be provided on the circuit breaker for use in the indication and controlling scheme of the circuit breaker.



(iii) Rated supply voltage and rated supply frequency :

The rated voltage for the auxiliary supply shall be 230 V AC supply. Each switchgear shall be provided with built in Power packs.

(c) Constructional features:

The circuit breakers shall be triple pole metal clad truck mounted horizontal draw out type enclosed in cubicle made of CRCA sheet steel of minimum 2 mm thickness and shall comply with latest edition of relevant IS. The cubicle /panels shall be vermin proof and dust tight. The cubicle shall be of folded type construction. The switchgears and control gear shall be complete with all necessary supporting frame work, nuts and bolts etc. for securing the same to the floor. The operating mechanism shall operate (close/open) all the three phases simultaneously. The operating mechanism, links etc. should be accessible for maintenance. Mechanical safety shutters should be provided between breaker and panel. Engagement and disengagement of auxiliary supply should be automatically linked through the movement of the truck so that in service condition auxiliary supply is automatically made. All six terminals shall brought out of cubicle through appropriate class of cable termination and sealing kits. All the breakers shall be supplied with necessary clamps suitable for appropriate current ratings. Suitable arrangement of earthing the switchgear and control gear panels shall be provided. The arcing contacts shall be made of homogeneous special alloy so that surge voltages are reduced to negligible level and multiple arc reignitionis eliminated. All the connecting bus bar shall be made of Aluminum for these indoor circuit breakers.

For indoor panels, switchgear (circuit breakers, CTs, PTs etc.) and control gear (relays, C&R panel meters etc.) shall be mounted on the same panel. A set of air insulated electrolytic copper bus bars with PVC sleeves or PVC insulation are to be provided for all indoor switchgear panels. The switchgear panels shall be provided with the arrangement for extending the bus bar and inter-connecting bus bars. Their supports, nuts and bolts etc. will be supplied loose. The region of such inter connection shall normally be blanked on panels. The bus bars should be of electrolytic copper with permissible limits of current density. Size of the bus bar and current density should be specified in the tender. The bus bar conductor shall conform to IS: 8034. The bus bar shall be rated for 40KA for 3 Seconds. Painting of panel cubicle shall be epoxy based powder coated. The paint shade of indoor panels shall be RAL-7032

(d) Vacuum Circuit Breaker:

The three phase vacuum circuit breakers will have three interrupters (one interrupter per phase) mounted on same carriage. The interrupters shall be air insulated in epoxy resin tank or with epoxy resin phase barriers. Each interrupter shall have fixed and moving contacts in sealed envelope having vacuum below 10-6torr. The metallic bellow shall permit axial movement of moving contact and act as vacuum seal. The contacts shall have requisite mechanical strength and good electrical and thermal conductivity and shall be made of copper chromium alloy. Complete literature of vacuum bottles shall be furnished with the tender.



(e) Voltage Transformers :

(i) Highest equipment voltage : 124 kV

(ii) No. of phases : 3

(iii) Insulation level :

a. Impulse withstand voltage : 125 kVP

b. One minute power frequency withstand voltage on :

: 50 kV

1. Primary winding : 50 kV rms

2. Secondary winding : 2kV rms

(iv) Frequency : 50 Hz.

(v) Transformation ratio : 11000/110 V

(vi) Rated output : 50 VA / phase

(vii) Accuracy class : 0.5 For measurement and 3P for Protection.

(viii) Winding connection : Star/Star

(ix) Rated voltage factor : 1.2 continuous and 1.9 for 30 seconds

(x) Type of insulation : Resin cast

VTs shall be provided with HRC type fuses on the secondary side. The VT fuses on primary side shall also be provided with all safety precautions. One of the secondary terminals of the VTs shall be solidly earthed. One number three phase voltage transformer of this rated output will be required for each incoming indoor panel. Voltage transformers should be mounted in the top part of the cubicle for ease of replacement of fuses.



(f) Current Transformers :

(i) Rated voltage : 22/24kV

(ii) Insulation level :

a. Impulse withstand voltage : 125kVP

b. One minute power frequency voltage on

:

1. Primary winding : 50 kV rms

2. Secondary winding : 2 kV rms

(iii) Frequency : 50 Hz

(iv) Rated continuous thermal : 120% of rated primary current

(v) Short time thermal rating current : 40 KA for 3 Sec.

(vi) Transformer CTs of ratio for incoming type indoor panel.

:

(vii) Rated output/accuracy etc. for CTs. : Core-I Core-II

a. Rated output

However VA burden should not be less than suitable for A.C. series trip requirement with shunt trip arrangement

: 10 VA 10 VA

b. Class of accuracy : 5P 0.5 S

c. Accuracy limit factor : 15 -

d. Purpose : Relaying Metering

(viii) Max. instrument security factor : - 5

(ix) CT for differential protection and restricted earth fault protection

: PS Class

(x) Type of Insulation : Resin Cast

The core shall be of high grade non ageing laminated silicon steel of low hysterics loss and high permeability to ensure high accuracy for both normal and fault current.

(g) The rating of secondary winding shall be 1 Amps. However, the current transformers will have to satisfy the requirement of rated VA burden, class of accuracy, accuracy limit factor and short time thermal rating as specified. Magnetization curves corresponding to all secondary taps must be submitted with the tender.



The ratings of current transformers of all classes regarding ratio error, knee point voltage, resistance of secondary winding etc. shall have to be co-ordinated with the requirements of protective relays and protection scheme, without any extra cost.

(h) All the type test certificates are also needed to be furnished with tender.

(i) The tenderer shall also furnish along with the tender, complete general arrangement, schematic and outline diagrams indicating the mounting arrangement and position of current transformers, voltage transformer terminal blocks etc. Type of currenttransformer and voltage transformer employed shall also be clearly stated.

Indicating and Integrating Meters/Instruments :

All indicating instruments shall be of switchboard type, back connected, suitable for flush mounting and provided with dust and vermin proof cases for tropical use and finished in suitable colour. All instruments shall have practical laboratory means for adjustment of accuracy. The limits of errors for ammeters/voltmeters shall be those permissible for class 0.5 instruments as per IS: 1248. The ammeters and voltmeters shall be suitably scaled to indicate the current/voltage for all the rating of current/voltage transformers. A phase selector switch with four/six position shall be used to measure the current/voltage of each phase/line. The meters shall be located at eye level to facilitate observation of readings correctly.

A.C. Static HT Trivector Meter :

A.C. Static HT Trivector Meter shall be provided with RS485 communicable in 22kV Switchgear for energy measurement. The meters shall be located at transformer HT side VCB panel on eye level to facilitate observations of readings correctly.

Relays :

(a) 22kV Switchgear located near 5000 KVA transformer in proposed SPV plant shall have Numerical relay(Siemens 7SJ64/ MiCom P132/ or equivalent ) and it should have the following as a minimum protection :

(i) IDMT + Instantaneous O/C, S/C (50/51)

(ii) IDMT + Instantaneous E/F protection (50N/51N)

(iii) Reverse power relay(32)

(iv) Breaker failure protection (50BF)

(v) Trip circuit supervision (74TC)

(vi) Lockout (86)

(b) For22kV Switchgear located in Existing CME 22kV Receiving Station for evacuation shall have following as a minimum protection :

(i) IDMT + High set and Instantaneous O/C, S/C (50/51)

(ii) IDMT + High set and Instantaneous E/F protection (50N/51N)

(iii) Breaker failure protection (50BF)

(iv) Trip circuit supervision (74TC)

(v) Lockout (86)



(c) 5000 KVA Oil filled transformer protections:

(i) Bucholz trip (63T) - (transformer mounted via marshalling box)

(ii) Oil Temperature trip (26T) - (transformer mounted via marshalling box)

(iii) Winding Temperature trip (49) - (transformer mounted via marshalling box)

(iv) Pressure Relief Device - (transformer mounted via marshalling box)

The circuit breaker shall be fitted with shunt trip coil for operation on Numerical relay with communication facility with standard open protocol / SCADA compatibility. The coils should be rated for 110VAC operation on station battery.

Three phase protection relays shall be Numerical Over-current & Earth Fault protection having 2 elements for over current and one for earth fault protection. The setting for over-current shall be 50-200% (in step of 1%) for earth fault element from 5 to 80% (in step of 1%).

These relays shall be numerical / non directional with selectable curve from all standard 5 IDMT curves. The relay should be able to store a minimum of two previous fault values including fault level and phase. The relay should be fully compatible to SCADAsystem.

The relay shall be numerical type mounted in flush pattern on the panel board. The relay should be rated for 1 Amp. CT secondary. The relay should conform to IS:3231& 8686 specifications. The tenders shall furnish the detail in this regard along with the offer.

All the relays shall be provided with test blocks in panel so designed that the relays may be tested at site. The relays should have provision of testing either through test block or test plug easily accessible by injecting the voltage / current / frequency (as applicable) from external testing instruments /source without first disconnecting/ reenergizing the primary electrical circuit protected by the relays. Facilities for isolating the tripping circuit during such testing shall be also provided.

The requirement of test block shall not be applicable in case of draw out type relays which can be tested by using test plug without removing the relay from its casing.

The testing facilities provided in the relays shall be specifically stated in the bid. Necessary test plug etc. as may be required for proper testing shall be included in the contractor’s scope of supply. One test plug with five panels or part thereof is to be supplied.

Wiring:

All wiring shall be of switch board type consisting of copper conductor of 1.5 Sq. mm. for alarm / annunciation / control circuits and 2.5 Sq.mm. for CT and all other Circuits insulated with polyvinyl chloride insulation suitable for 660 Volt service and in accordance with relevant IS: 732. Polyvinyl Chloride used shall have excellent resistance against burning, moisture, oil and vermin and shall be finished with clear colour. Rubber insulated wiring shall not be acceptable. Tenderers shall furnish the details of method being adopted by them for Joint /Connections.

All instruments and Panel wiring shall be of heat resisting and self-extinguishing type in compliance with IS. Plastic or porcelain cleats of the limited compression type shall be used for holding wiring runs. All wires shall be suitable for bending to meet the terminal studs at right angles. Metal cases of all apparatus mounted on panels shall be separately earthed by means of copper wire or strips. The following colour scheme of the wiring shall be used as per IS: 375.



(a) AC three phase circuits :

(i) No.1 Phase : Red.

No.2 Phase : Yellow.

No.3 Phase : Blue

(ii) Neutral Conductor : Black

(iii) Connection to Earth : Green

(b) D.C. circuits : Grey

Mimic Diagram :

For indoor panels painted colour bands shall be used for the mimic bus. The mimic diagram shall be on eye level. Equipments such as current transformers, voltage transformers etc. shall be represented by suitable symbols. The colour shall be Red Shade 537 of IS-5.

Indicating LEDs / LAMPS :

Indicating LEDs shall be provided on the control board to indicate the following:

(a) Visual indication of ON and OFF position of each circuit breaker.

(b) Trip circuit healthy indication.

(c) Auto trip indication for each circuit breaker panel.

(d) VT supply indication.

Test Terminal Blocks :

Two nos. test terminal blocks shall be provided one for testing of relays and other for testing meters. They shall be of switch board, back connected type for front of panel mounting. The test blocks shall provide complete isolation of meters, instruments, etc. and the arrangement shall be such that testing power could be connected at the test block from any external source or may be taken from the instrument transformers. Provision shall be made for short circuiting current transformers. Suitable sealing arrangement shall be provided in test terminal blocks.

Ferrules :

Ferrules engraved/printed with the same number, letters or symbols as indicated in the connection and wiring diagram shall be provided on the terminal ends of all wires for identification of circuits for inspection and maintenance. Ferrules shall be of strong and flexible insulating material with glossy finish to prevent adhesion. They shall be engraved / printed and clearly marked and shall not be effected by dampness. Ferrule numbering shall be in accordance with IS: 375. The same ferrule number shall not be used on wires in different circuits on a panel.

Space For Cables And Cable Glands :

Sufficient space for receiving the cables inside the switch board at the bottom of the cubicles and mounting arrangement for the terminal cable glands shall be provided. Cable gland plates should be above the ground level for the ease of working.

Schedule Of Requirements:

22kV Switchgear for 1500KVA transformer shall have the following



(a) 22kV/630A Circuit Breaker vacuum type draw out with provisions of manual tripping by means of a control switch/push button.

(b) Motor Charged Spring operated closing mechanism or magnetic actuator operated device.

(c) Numerical relays with necessary protections along with communication facility and standard open protocol, Communication on RS-485, Port - Mod Bus - Open Protocol. (Siemens 7SJ64/Micom P132/ or Equivalent)

(d) Single phase 22kV current transformers of suitable ratio for metering and protection. The class of accuracy shall be 0.5 S for metering and 5P10 for protection. Rated burden (output) shall be 10 VA for each secondary winding. Instrument Security factor for metering core shall not exceed 5.

(e) 11000/110 Volts three phase voltage transformers of suitable burden and class of accuracy 0.5. The transformer shall be star-star connected.

(f) Digital AC voltmeter (g) Voltmeter phase selector switch to indicate phase to phase and phase

toneutral voltage of all the three phases. (h) Indicating LEDs coloured red, amber and blue for PT supply indication. (i) Arrangement for reception of incoming and outgoing cable connection

along with cable termination and sealing kits of requisite for suitable size of XLPE power cables.

(j) Set of three phase air insulated main Electrolytic copper bus bars of 630A continuous current rating with PVC insulation or sleeves. STC rating 40 KA for 3 seconds.

(k) Mechanical ON/OFF indicator. (l) Operating handle for independent manual closing mechanism. (m) Auxiliary switch having minimum of 8 contacts 4 normally open and

4 normally closed. (n) Digital ammeter (o) Ammeter selector switch to indicate phase current in all three phases

and with OFF position. (p) AC HT Trivector meter (q) KW/KWH meter, Power factor(PF) meter

(r) Auxiliary Relay for Transformer protection functions. (s) Automatic door CFL with Switch. (t) 240V, 80WAC single phase anti condensation heaters with thermostat

(0-60 Deg. C) and switch. (u) Anti pumping contactor. (v) Operation Counter. (w) Test terminal blocks for metering and relays, 3 phase 4 wire. (x) Fault trip yellow LED. (y) Trip Circuit healthy indication. (z) Ground Bus size min. 40 x 6 mm. copper. (aa) Bell for Alarm (bb) Hooter for Alarm (cc) 3 Pin Socket with switch (dd) Indicating Lamps for ON/OFF/Trip

10.8 22kV Switchgear located in existing CME 22kV Receiving Station for power evacuation shall have

(a) 22kV/630A Circuit Breaker vacuum type Draw out with provisions of manual tripping by means of control switch/push button.

(b) Motor Charged Spring operated closing Mechanism or magnetic actuator.

(c) Numerical relay with necessary protections along with communication facility and



standard open protocol.

(d) Single phase 22kV current transformers of suitable ratio for metering and protection. The class of accuracy shall be 0.5 S for metering and 5P15 for protection. Rated burden (output) shall be 10 VA for each secondary winding. Instrument security factor for metering core shall not exceed 5.

(e) 22000/110 Volts three phase voltage transformers of suitable burden and class of accuracy 0.5. The transformer shall be star-star connected.

(f) Arrangement for reception of incoming and outgoing cable connection along with cable termination and sealing kits of requisite size XLPE power cables.

(g) Set of three phase air insulated main electrolytic copper bus bars of 800 A continuous current rating with PVC insulation or sleeves. STC rating 40 KA for 3 seconds

(h) Mechanical ON/OFF indicator.

(i) Operating handle for independent manual closing mechanism

(j) Auxiliary switch having minimum of 8 contacts 4 normally open and 4 normally closed.

(k) 11000/110 Volts three phase voltage transformers of suitable burden and class of accuracy 0.5. The transformer shall be star-star connected.

(l) Digital AC voltmeter

(m) Voltmeter phaseselector switch to indicate phase to phase and phase to neutral voltage of all the three phases.

(n) KW/KWH meter, Power factor(PF) meter

(o) Automatic door CFL with Switch.

(p) 240V, 80W AC single phase anti condensation heaters with thermostat (0-60 Deg. C) and switch.

(q) Anti pumping contactor.

(r) Operation Counter.

(s) Adaptor Box for Matching existing panel bus bar(if necessary)

(t) Loose Set of 3 phase Air insulated inter connection electrolytic copper bus bars, 800 Amps. Rating with PVC insulation with nuts and bolts supports etc. STC rating 40 KA for 3 seconds.

(u) Test terminal blocks for metering and relays, 3 phase 4 wire.

(v) Trip Circuit healthy indication.

(w) Ground Bus size min. 40 x 6 mm. copper.

(x) Bell for Alarm

(y) Hooter for Alarm

(z) 3 Pin Socket with switch

(aa)Indicating Lamps for ON/OFF/Trip



1.5 Allequipments shall be complete in all respect. All fittings, accessories or apparatus which may not have been mentioned above but which are usual/ necessary for the equipments shall be included for each circuit breaker panel.

1.6 Temperature Rise :

The maximum temperature rise of various parts of the circuit breakers when tested under rated conditions shall not exceed the specified values at a peak ambient temperature of 50 deg. c. The breakers may be provided with silver plated contacts if necessary to meet the requirement of IS: 13118 where higher temperature rise is permitted with silver plating contacts. The quantity of silver facing shall be such that after carrying out one tenth of the total number of operations specified for the mechanical endurance test, there is still continuous layer of silver on the contacts. The temperature rise of CTs and PTs shall also not exceed the permissible values as per relevant Indian Standards when corrected for max. ambient temperature at site.

1.7 Inspection And Testing

Each equipment shall comply with and shall be subjected to all routine and acceptance tests prescribed in the relevant Indian Standard Specification/IEC.

i. Test of 22kV Indoor Circuit Breaker :

a. Routine/Acceptance Tests:

The following acceptance and routine tests shall be got conducted in presence of purchaser's representative as per stipulation of the relevant standards, on each unit.

(a) One minute power frequency voltage withstand dry test on main circuit.

(b) Voltage withstand test on control & auxiliary circuits.

(c) Measurement of the resistance of main circuit.

(d) Mechanical operating test.

(e) Design and visual checks.

(f) Any other tests not specified above but covered as per amendment/ latest edition of relevant IS/IEC.

1.1.1 The Contractor must furnish type test reports along with bid in respect of the equipment (of the type and design offered) type tested in NABL approved test laboratory for which particular test the lab has been accredited (for Indian Contractors). These type tests must not have been conducted earlier than three years from the date of opening of bid. The Contractor may furnish type test report latest upto 45 days after opening of tender.

ii. The type test reports of Circuit Breakers, Current Transformers, Potential Transformers, Relays etc. shall be complete in all respect along with oscillographic records, photographs etc. in respect of all type tests as per relevant IS/IEC. The type test certificates should be in respect of specific make and type / rating of the Circuit Breakers/ instruments, transformers etc. Intended to be supplied and not in respect of the breakers etc. Manufactured by their foreign collaborators if any. Necessary data with test reports to show capability of circuit breaker to withstand number of full level short circuit faults is also furnished. Complete literature must be sent with the tender.



iii. Routine & acceptance test as per relevant standard shall be carried out on each equipment covered by this specification in the presence of purchaser's representative. If so desiredby the purchaser all test reports shall be submitted and got approved from the purchaser before despatch of the equipment

iv. Technical Particulars

The tenderers shall furnish the guaranteed technical & other particulars of the equipments offered in the proforma appended at Data Sheet. Tenders not accompanied with such details are liable to be ignored. Make of various equipments should be clearly stated. Words like reputed, equivalent etc. shall not be accepted. Alternative makes of equipments should not be more than two in the order of preference.

v. Inter Changeability

All similar materials and removable parts of similar equipments shall be inter changeable with each other.

vi. Fault / Trouble Alarm Scheme

The automatic trip of the Circuit Breaker due to operation of protection relays shall be indicated by sounding of a hooter. All non-trip alarms shall be indicated by an alarm bell.

Other makes shall also acceptable if it is of "ISI MARK" or type tested for which tenderers shall furnish attested photocopies of ISI Certificate/type test report not older than 5 years for the respective make offered along with tender.

vii. Make / type of each relay, indicating instruments, integrating instruments, control switches, selector switches, indicating lamps, semaphore indicators, enunciator scheme, bell, hooter etc. shall be clearly and invariably indicated in the GTP (Guaranteed Technical Particulars), bill of material and unit price list. Only specific make accessories shall be indicated. The word" EQUIVALENT/ REPUTED MAKE" will not be given for consideration.

10.9 Lighting Distribution Boards/Lighting Panel / Distribution Boards

(a) Main distribution board/ Lighting panels shall be wall/Column mounted. However, the above provisions may be changed as per design requirement.

(b) The Lighting Distribution board shall be fed from UPS DB. The lighting distribution boards shall consist of four pole MCB as incomer and required number of outgoing feeders.The board shall be designed for the required short circuit level of 9 kA. All the distribution boards shall be sheet steel metal clad, dust and vermin proof, cubicle type with degree of protection conforming to IP-52. Outdoor panels shall be weather proof type with IP-54 protection. The thickness of sheet steel enclosures shall be 2 mm minimum for load bearing, 1.6 mm for other members and 3mm for gland plate.

(c) The equipment shall be housed inside a sheet steel cubicle with hinged front access door and the board shall be complete with Aluminium busbar, of size not less than 25x6 mm, in an enclosed busbar chamber, floor pedestals including iron base for floor mounting, necessary bolts, nuts etc.

(d) The Lighting Distribution board shall be Detachable blank circuit label to be inscribed at site.

(e) The Lighting Distribution board shall be consisting of Caution board.



(f) The lighting panels shall be rated for 415 V, 3 phase, 4 wire, AC with neutral bus and suitable for either wall/column mounting. Indoor panels shall have degree of protection of IP 52 and the outdoor panels shall have a degree of protection of minimum IP 55. Additionally, all outdoor panels shall be provided with detachable canopy at the top with regular slope towards the rear to prevent accumulation of rain water.

(g) The panel bus bars shall be of electrolytic grade Hard drawn Aluminium, sized for a maximum temperature of 40ºc over the ambient temperature, colour coded for easy identification of phase and neutral bus bars. Minimum size shall be 25x6mm

(h) The cable/conduit entry may be either from the top or bottom (for Indoor Panels) / from bottom only (for Outdoor Panels) with removable cable gland plates and shall be terminated in suitable separate terminal blocks. Necessary double compression type brass cable glands, tinned copper cable lugs are to be provided.

(i) Provision shall be made for earthing the panel at two points. A copper earth bus shall run along the length of the panel. The front access door of the panels shall have padlocking arrangement.

(j) The incoming to each Normal AC Lighting Panel shall be provided with a triple pole MCB with neutral isolating facility and one earth leakage circuit breaker. Combined type triple pole MCB and earth leakage circuit breaker (ELCB) are also acceptable for incomers to Lighting Panels.

(k) Normal AC lighting panels shall have outgoing MCBs having thermal elements for overload protection and an instantaneous magnetic trip to protect against severe faults. All MCBs provided shall be suitable for breaking capacity of 9kA (minimum) at 230 V AC.

(l) The Emergency Lighting Panels shall have Incoming and outgoing feeders with HRC Switch fuse units or MCB units with back up fuse as required.

(m) The Lighting Panels shall be of double door type with the outer enclosure made of sheet steel having a minimum thickness of 2 mm with a hinged door and suitable locking arrangement.

(n) Each of the LDBs/ ELDBs shall be provided with voltmeter and ammeter along with selector switches, ‘SUPPLY ON’ indicating lamps, etc.

(o) The incomers of Lighting Distribution Boards (LDB) shall be provided with energy (kWh) meter for measurement of energy consumed by the lighting loads. The electronic energy meters shall be 3 phase, 4-wire type suitable for measurement of unbalanced loads. Energy meter shall have provision to communicate with DCS through open protocol IEC61850

(p) Each outgoing MCB shall be of 15 A, but load to be limited to 2 kW or maximum 10 nos. fittings to be connected to one MCB.

(q) Individual control in office buildings shall be through single pole flush type switches. In those areas where group controls are required, rotary switches/MCBs shall be provided.

(r) Lighting panels feeding the remote areas shall be provided with contactors for control from a remote point. Lighting fixtures of remote area shall be fed from different circuits such that all the lights in the area are not ‘On’ all the time. The lights connected to a circuit or few circuits shall be ‘ON’ automatically through photocell. Provision shall be made for switching ‘ON’ for rest of the lights. In heat zones, ie; in the areas where ambient temperature is 60 °C and above, heat resistant control cables shall be used in hot dip galvanized rigid steel surface.



(s) Each Lighting Distribution Board shall be complete with designation and caution notice plates fixed at front cover and a directory plate fixed inside the front cover. This directory plate shall contain details of the lighting panels being fed from the Distribution Board including their designation, location, loading etc. Each Lighting Panel shall be complete with designation and caution notice plates fixed on front cover and a circuit directory plate fixed on inside of the front cover. Circuit directory plate shall contain details of the points to be controlled by each circuit including the location of the point controlled, rating of the protective units and loading of the circuit. The plates shall be of anodised aluminium with inscriptions indelibly etched on it. For street / roads lighting, 3-phase power from LDB shall be supplied by 3 nos. single pole MCB. The circuit shall be looped in and out at each lighting pole through a Junction box and Tee off shall be provided with single pole MCB for supply of power to the fixture of that lighting pole.

(t) Number of outgoing feeders in LDB’s, SLDB’s shall be provided as per requirement. 2 NOs Feeders for Purchaser’s use , and 20% spare feeders of each type and rating shall be provided in LDB, LDBs/SLDBs.

(u) Necessary cabling including laying and terminations shall be in the scope of this Contractor.

(v) Loop-in-loop-out J.B: LILO Box (Out door type with IP-55) made of sheet steel (CRCA), min. 2mm thickness, having the following and design approved by CME,

(i) 25A terminal block for Loop-in-loop-out of cable

(ii) Fuse with link for connection to street light etc.

10.10 UNINTERRUPTIBLE POWER SUPPLY SYSTEM

i. Suitable rating of UPS (30 minutes backup, load power factor range 0.85 lag to unity) 230 V, 50 Hz, single phase Uninterruptible Power Supply system complete with all accessories, Sealed Maintenance Free lead acid battery set with racks, UPS DB and necessary accessories.

ii. Requirements And Services To Be Furnished Under The Specification The UPS System shall mainly comprise of the following:

(a) Rectifier Unit (b) Static Inverter (c) Set of Sealed Lead Acid Maintenance Free Battery (d) 230 V AC distribution boards (e) Built in Isolation Transformer (f) One bypass transformer with servo control Voltage Stabilizer (g) Static Transfer Switch (h) Manual By Pass Switch (i) One (1) Set of interconnecting cables - between various subsystems,

cables glands, lugs and accessories etc. (i) Necessary Circuit breaker/Switch Fuse unit for protection.

1.2 Codes And Standards Codes and Standards shall also meet the requirements of latest IS / IEC.The design and workmanship shall be in accordance with the best engineering practice. The design, manufacture, inspection, testing and performance shall comply with latest revisions of Indian standards, Electricity Act, Indian Electricity Rules and Regulations of Statutory Authorities (Chief Electrical Inspector to State Government).

a. IS-2705 (1992) : Current Transformer

b. IS-2834 (1986) : Shunt Capacitors

c. IS-2959 (1985) : A.C. Contractors

d. IS-3231 (1986) : Electrical Relays.

e. IS-3700 (1988) : Essential ratings and characteristics of semi-Conductors devices.



f. IS-3895 (1966) : Monocrystalline semi-conductor rectifier cells and Stack.

g. IS-4064 (1978) : Air break Switches.

h. IS-4237 (1991) : General requirements for switchgear & control gear

i. IS-6553 (1992) : Environmental requirements for semi-conductors Devices and integrated circuits.

j. ICE-146 : Semi-conductor converters.

1.3 Mode Of Operation And Performance Requirements Under normal conditions, the loads shall be supplied by the inverters. The rectifier / battery chargers shall derive power from normal AC source and supply DC power to the inverters while simultaneously float/boost charging the battery. In case, the inverter fails, automatic change over to standby transformer shall be effected through static switches. Upon failure of the normal AC source, the loads shall continue to be supplied by inverters which, without any switching shall obtain their power from storage battery for duration of 30 minutes.Upon restoration of the normal AC source, the rectifier/battery chargers shall power the inverters and simultaneously recharge the battery. This shall be automatic causing no interruption to critical loads.

a. The entire load shall be automatically transferred to an alternate AC source through static switch within a maximum of four (4) milli seconds under the following conditions.

(a) Battery discharged completely (b) Initiation of manual control switch

b. In case of failure of inverters, static transfer switch shall changeover within five (5) milli seconds to connect the alternate AC source to the load. On restoration, the retransfer shall be manually initiated.

c. During Asynchronous conditions, if the UPS fails the load shall be transferred through contactor arrangement to the bypass within 20 milli seconds.

d. Retransfer of load shall be accomplished automatically by synchronising the inverter to the alternate source and allowing the inverter to ramp into the load and then disconnecting the alternate source.

e. Manual transfer facility through static transfer switches shall be provided in either direction.

f. In case of maintenance requirement, it shall be possible to isolate inverters and static bypass switches from load and connect alternate AC source to the load through manually operated, make before break manual transfer switch.

g. When battery is taken out of service for maintenance, it shall be disconnected from the rectifier/charger and inverter by means of miniature circuit breakers. The UPS shall continue to function and meet all performance requirements except for the reserve time capability.

1.4 Rectifier Cum Battery Charger The charger shall provide DC supply at the input terminal of the inverter and battery. The charger shall be of static type, comprising of Silicon Controlled Rectifiers (SCRs) connected in three phase full wave bridge circuit and shall be complete with filter circuits to limit the ripple within the limits specified in Data Sheet A. The rectifier transformer shall be of dry type, double wound with adequate number of primary taps.In float charging mode, charger shall have both auto and manual voltage regulation arrangements with Provision of Selector switch. Output DC voltage shall not vary beyond + 1%.The float charger controller shall have built in load limiting feature which will limit the load on charger in the event of over load and reduce the output voltage. The current setting of load limiting device shall be uniformly adjustable between 100% and 110% of full load. Float -cum-Boost charger shall be provided with suitable device for detection of AC under voltage, DC under over voltage and DC earth fault, fuse failure on AC and DC sides and charger overload condition.



1.5 Static Inverter Inverter shall be of Thyristor controlled alternatively power transistor controlled Pulse Width Modulated (PWM ) control type for providing output power having parameters as specified .

1.6 Static Transfer Switch Static switch shall be of Thyristor controlled type having operating time less than 4 milliseconds. The transition shall be ‘make before break’ type.

1.7 Manual Bypass The manual bypass switch shall be used to isolate the static transfer switch from its load and from bypass supply source without interrupting supply to the load. Manual bypass transfer shall be make before break.

1.8 Battery The battery shall be sized to feed load for the period specified. Vendor shall furnish calculations for battery capacity. Battery shall be supplied with all necessary accessories.

1.9 ALARMS, INDICATIONS PROTECTIONS AND METERING i. Inverter Panel

Following minimum Audio/Visual alarm / indications and protections shall be provided for the static inverters :

a. Protections (a) RFI filter at the rectifier input (b) Fast acting semi conductor fuses for all devices (c) D.C. over voltage (d) HRC fuses for D.C. filter capacitors (e) Battery charging current limit (f) Snubber circuit for each device dv/dt protection (g) Semi-conductor fuses at inverter input and output (h) Static Isolator for early removable of faulty inverter (i) Over temperature for the inverter (j) Fuses in the control circuit (k) Low Battery Voltage

b. Alarm / Indications (a) Inverter fuse failure annunciation (b) Inverter overload annunciation (c) D.C. over voltage/ under voltage annunciation (d) Inverter fan failure (if fans are provided) annunciation (e) Inverter loss of synchronism annunciation (f) Inverter failure annunciation (g) Emergency Shut-down (h) Low Battery voltage (i) Equipment over –temperature (j) Mains Failure (k) Fan failure (l) Battery on load (m)DC ground fault

ii. Static Transfer Switch a. Protections

(a) Fast acting semi conductor fuses for device (b) Snubber circuit for each device

b. Alarm/Indications (a) Switch in “Normal “ position indication (b) Switch in ‘By pass’ position indication (c) ‘Normal & By pass Sources in Synchronism’ indication (d) ‘Bypass Source Deviated’ annunciation (e) Static switches fuse failure annunciation



c. Bypass Source (a) Mains ON indications (b) Mains failure/phase annunciation (c) Bypass ON indication. (d) Frequency out of acceptable limit alarm and indication.

d. Metering

Following metering instrument shall be provided on the UPS :

(a) Input side (i) AC Voltmeter with VSS (ii) AC Ammeter (iii) Frequency meter (iv) DC Voltmeter (v) DC Ammeter

(b) Output side (i) AC Voltmeter (ii) AC Ammeter (iii) Frequency Meter

iii. Constructional Features UPS equipment shall be housed in panels freely standing on floor. The panels shall be sheet steel construction of CRCA of thickness not less than 2 mm. Suitable neoprene sponge rubber gaskets shall be provided on doors and covers plates to make the panel construction dust and vermin proof. The panel shall be complete with internal wiring and input/output terminals blocks. All equipments and wire terminations shall be identified by symbols corresponding to applicable schematic/wiring diagrams. The cubicles shall be provided with 240 V AC Power socket for connecting instruments during testing. All remote alarm contacts shall be wired upto the panel terminals blocks.

iv. A.C. Distribution Boards The A.C. Distribution Boards shall be inbuilt in the UPS Panels. All outgoing feeders shall be provided with Miniature circuit breaker as a minimum Protection.

1.10 POWER AND CONTROL CABLES All external power cables required for interconnection between sub-systems of UPS shall be 650/1100 V grade stranded copper conductor, PVC insulated, steel wire armoured cable. Cable size shall be selected on the basis of rated current and shall be suitably coordinated with corresponding protective device. Control cables shall be of 650/1100 V grade copper conductor of minimum 1.5 mm2 size, PVC insulated steel wire armoured wrapped PVC inner sheath, extruded PVC outer sheath. The CT circuits shall be minimum 2.5 mm2.

1.11 GROUND BUS Copper ground bus rated to carry maximum fault current shall be furnished along entire length of UPS switched A.C. Distribution Boards Grounding terminals shall be provided at two points for connection to purchaser’s ground grid.

1.12 PAINTING Steel fabrication work shall undergo surface pre-treatment such as degreasing, descaling, etc. Prior to application of two coats of epoxy based primer. Final two coats of epoxy based paint shall be applied with minimum paint thickness of 50 microns. The shade of final coat shall be as specified. Adequate quantity of touch up paint shall be furnished for application after installation.

1.13 Plant Monitoring Desk i. Computer aided data acquisition unit shall have features for simultaneous

monitoring and recording of various parameters of different sub-systems, power supply of the Power Plant at the DC side and AC side.



ii. Computer Aided Data Acquisition Unit shall be a separate & Individual system comprising of different transducers to read the different variable parameters, A/D converter, Multiplexer, Demultiplexors, Interfacing Hardware & Software, Industrial Type PC, which will be robust & rugged suitable to operate in the Control Room environment.

iii. Reliable sensors for solar Radiation, Temperature & other electrical Parameters are to be suppliedwith the data logger unit.

iv. The PC Shall of Industrial type, rugged & robust in nature to operate in a hostile environment. The PC has latest configuration and adequate memory. The PC shall also have 21” LCD colour monitor, DVD Drive with writer, multimedia kit and UPS with 30 hours Power back up. The printer shall be of industrial type, rugged & robust in nature. The printer shall be equipped for printing, scanning, copying and fax.

v. The data acquisition system shall perform but not limited to the following operations: (a) Measurement and continuous recording of (i) Ambient Air Temperature near Array Field (ii) Module Back Surface Temperature (iii) Wind Speed at the level of Array Plane (iv) Solar Irradiation Incidental to Array Plane (v) Inverter Output (vi) System Frequency (vii) DC Bus Output (viii) Energy delivered to the GRID in kWh. (b) All data shall be recorded chronologically date wise. The data file

should be MS Excel compatible. The data logger shall have internal reliable battery backup to record all sorts of data simultaneously round the clock. All data shall be stored in a common work sheet chronologically. Representation of monitored data shall be in graphics mode and/or in tabulation form. All instantaneous data can be shown in the Computer Screen.

(c) The Bill of Materials associated with the equipment must clearly indicate especially the detail about the PC, Modems, etc.

(d) The data acquisition system should be housed in a desk made of sheet steel.

CABLES & INSTALLATION ACCESSORIES

vi. Codes And Standards

All equipment and materials shall be designed, manufactured and tested in accordance with the latest applicable Indian Standards (IS) / IEC as given below or any international standard acceptable to purchaser.

(a) IS:1554(PartI) : PVC insulated(heavy duty) electric cables for working voltage up to and including 1100V

(b) IS:1554(Part II)

: PVC insulated(heavy duty) electric cables for working voltage from 3.3kv up to and including 22kV

(c) IS: 3961 : Recommended current ratings for cables.

(d) IS: 8130 : Conductors for insulated electric cables and flexible cords

(e) IS:5831 : PVC insulation and sheath of electric cables

(f) IS: 2982 : Copper conductor in insulated cables and cords.



(g) IS: 3975 : Mild steel wires, strips and tapes for armouring cables

(h) IS: 5609 : Specification for low frequency wires and cables with PVC insulation and PVC sheath

(i) IS: 6380 : Specification of elastomeric insulation of sheath of electric cables.

(j) IS: 434(I and II)

: Specification for rubber insulation cables.

(k) IEC: 540 : The methods for insulations and sheath of electric cables and cords(elastomeric and thermoplastic compounds)

(l) IEC: 230 : Impulse tests on cables and their accessories

(m) IEC: 60 : High voltage test techniques

(n) IEC: 287 : Calculation of the continuous current rating of the cables (100% load factor).

(o) IEC: 288 : Nominal cross sectional area and composition of conductor of insulated cables.

(p) IEC: 502 : Extruded solid dielectric insulated power cables for rated voltages from 1kV upto 30kV.

(q) NEMA-WC-5 : Thermoplastic insulated wires and cables for transmission and distribution of electrical energy.

(r) IEEE: 383 : Standard for type test for class IE electric cables, filled splices and connection for nuclear power generation station.

(s) IEC: 332-1 : Test on electric cables under fire conditions.

(t) ASTM-D-2843 : Standard test method for density of smoke from burning/decomposition of plastics.

(u) ASTM-D-2863 : Test for determination of oxygen index.

(v) IEC-754-I : Test method for acid gas generation

(w) IEC-331 : Fire resisting characteristics of electric cables

(x) : SVENSK Standard SS-4241475 Class F3

(i) BICC Hand Book For cables in fire regarding temperature index-chapter-6

(ii) Indian Electricity Rule.

Equipment and material conforming to any other standard, which ensures equal or better quality, may be accepted subject to approval of the Owner.

The electrical installation shall meet the requirements of Indian Electricity Rules as amended up to date and relevant IS Codes of Practice. In addition, other rules and regulations applicable to the work shall be followed.

vii. Design Criteria

a. For L.V. Cable:



(a) The cable shall be used for connection of power and control circuits of the auxiliary electrical systems.

(b) The cable shall be suitable for installation in the required site conditions.

(c) Cables shall be sized suitably with proper derating factors as per the installation conditions of the cable.

(d) For continuous operation at specified rating as well as during short circuit condition the maximum conductor temperature shall be limited to the permissible value as per relevant standard.

(e) The insulation and sheath materials shall be resistant to oil, acid and alkali and shall be tough enough to withstand mechanical stresses during handling.

(f) Armouring, wherever provided, shall be single round/ flat wire of galvanised steel for multi-core cables and aluminium for single core cable. Cables in buried formation shall be armoured. Cables laid in duct banks/conduits shall be unarmoured. This will be applicable for all LT cables(On AC side).The outer sheath shall have flame retardant low smoke (FRLS) characteristics and shall meet the requirements of additional tests specified for this purpose.

(g) Core identification for multi-core cable shall be provided by colour coding. Power cables shall be chosen taking into account the following factors:

(h) Systemfault level.

(i) Maximum time for fault clearance (i.e. operating time of the back up protection relay plus the time of operation of the circuit breakers).

(j) Full load current of the circuit.

(k) Short circuit current and duration (for breaker protected cables)

(l) Installation conditions.

(m) Voltage drop under normal running and starting condition

(n) Voltage drop at motor terminals shall be within permissible limit during starting & normal running.

(o) The cable should withstand the maximum fault current corresponding to the particular voltage level for the minimum time before the fault is cleared.

(p) Consideration shall also be given to limit the cable to the nearest standard sizes instead of using too many types.

(q) The standard cable sizes, ampacities, derating factors, etc. Shall be as given in is or relevant standard.

(r) The minimum size of power cables to be used shall be as follow :

(i) ALUMINIUM CONDUCTOR

: 6 SQ. MM.

(ii) COPPER CONDUCTOR : 2.5 SQ. MM.

(b) For H.V. Cable:-

The cable shall be suitable for installation in the required site conditions.

(a) The HV cables (22kV) shall be unearthed grade as it is used in non-effectively earthed systems.

(b) Cables shall be sized suitably with proper de-rating factors as per the installation conditions of the cable.



(c) For continuous operation at specified rating as well as during short circuit condition the maximum conductor temperature shall be limited to the permissible value as per relevant standard.

(d) The insulation and sheath materials shall be resistant to oil, acid and alkali and shall be tough enough to withstand mechanical stresses during handling.

(e) Armouring, wherever provided, shall be single round wire of galvanised steel for multi-core cables and aluminium for single core cable. Cables in buried formation shall be armoured. Cables laid in duct banks/conduits shall be unarmoured.

(f) The outer sheath as well as the inner sheath shall have flame retardant low smoke (FRLS) characteristics and shall meet the requirements of additional tests specified for this purpose.

(g) Core identification for multi-core cable shall be provided by colour coding.

(h) Power cables shall be chosen taking into account the following factors:

System Fault level.

Maximum time for fault clearance (i.e. operating time of the back up protection relays plus the time of operation of the circuit breakers).

Full load current of the circuit.

Short circuit current and duration (for breaker protected cables)

Installation conditions.

Voltage drop under normal running and starting condition.

Voltage drop at motor terminals shall be within permissible limit during starting & normal running.

Consideration shall also be given to limit the cable to the nearest standard sizes instead of using too many types.

The standard cable sizes, ampacities, derating factors, etc. shall be as given in IS 2165(Part II) or relevant standard.

The insulation level of the cable shall be as per the type of grounding (effectively/non-effectively earthed) of the system and the ground fault clearing time.

The Continuous current rating of the cable shall be calculated in accordance with IEC 60287 Part 1, 2 & 3.

viii. Specific Requirements



A. Type of Cable

Power cables shall be stranded aluminium conductor, cross linked polyethylene (XLPE) insulated, extruded black FRLS PVC inner sheathed, armoured and overall FRLS extruded black PVC sheathed cables conforming to IS: 7098.

Control Cables shall be 1100 V grade with annealed high conductivity stranded copper conductor, PVC insulated, FRLS PVC inner sheathed, armoured and FRLS extruded black PVC outer sheathed cables conforming to IS : 1554.

b. Conductor

The cable conductor shall be made from standard Aluminium for Power cables and Copper for control cables to form compact conductor having a resistance within the limits specified. All the cables of size 25mm2 and above shall have sector shaped conductors.

c. Insulation

The insulation of the LV power cable shall be XLPE type & for control the insulation shall be PVC type. It shall be designed and manufactured for the specified system voltage. The manufacturing process shall ensure that insulation shall be free from voids. The insulation shall withstand mechanical and thermal stresses under steady state and transient operating conditions. The extrusion method should give a very smooth interface between semi conducting screen and insulation. The insulation of the cables shall be of high standard quality.

d. Insulation Shield

A non magnetic semi conducting shield shall be put over the insulation to confine electrical field to the insulation. The XLPE cable insulation shield shall be strippable.

The metallic layer of the insulation shield shall be grounded at least at one location in the cable’s run. In the case of single conductor cable, care should be taken with regard to ampacity when grounding at more than one point.

For all the cables having insulation shield, it shall have some form of stress relief measure at every splice at termination. This can be stress cones, moulded devices, heat shrink or cold shrink kits. All kits must be suitable for the voltage class and cable size.

e. Inner Sheath

The sheath shall be suitable to withstand the site conditions and the desired temperature. It shall be of adequate thickness and applied by a continuous process to produce a sheath of consistent quality free from all defects. PVC sheath shall be extruded with FRLS properties.

f. Armour

Hard drawn aluminium wire armouring/ galvanized steel tape/ wire armouring shall be used for single core and multi-core cable respectively. Cables should be un-armoured wherever indicated. The hard drawn aluminium wire for armour shall be of H4 grade, as per IS-8130 (having tensile strength above 150 N/mm2). The diameter of the aluminium wire shall be as per the table for the dimensions of the galvanized steel wire armour given in the relevant standard.

g. Serving / Outer Sheath

FRLS extruded black PVC serving as per IS: 1554 otherwise shall be applied over the armouring with suitable additives to prevent attach by rodent and termites. All serving must be given anti-termite treatment.



h. Packing

(a) Cables shall be supplied in non-returnable drums. Drum lengths shall be such so that cable joints are totally avoided. The drums shall be of heavy construction. All wooden parts shall be manufactured from seasoned wood. All ferrous parts used shall be treated with suitable rust preventive finish or coating to avoid rusting during transit or storage. Wooden cable drum shall be treated by immersing in copper-nitrate solution.

(b) The ends of each cable length shall be sealed before shipment. Heat shrinkable cable cap shall be used for this purpose.

(c) A label shall be securely attached to each end of the reel indicating the length, type, voltage grade, conductor size and number of cores of the cable. A tag containing the same information shall be attached to the leadings end of the cable inside. An arrow and necessary instructions shall be marked on the drum indicating the direction in which it should be rolled. Drum numbers are to be indicated on the cable drums.

i. Spare Core

Multi-core control cables shall have 20% spare core, minimum one spare.

Separate cables for each type of following services / functions as applicable shall be used for each feeder. Same multi-core cable using different services shall not be acceptable.

(a) Power

(b) Control, interlock and indication.

(c) Metering and measuring.

(d) Alarm and annunciation.

(e) C.T. Cables.

(f) V.T. Cables.

ix. Constructional Requirements

(a) Cable shall have suitable filters laid up with the conductors to provide a substantially circular cross section before the sheath is applied. Fillers shall be suitable for the operating temperature of the cable and compatible with the insulating material. All materials shall be new, unused and of finest quality.

(b) Workmanship shall be neat, clean and of the highest grade.

(c) LT Power cables shall be 1.1kV grade, heavy duty, stranded aluminium conductor, XLPE Insulated galvanized steel wire/strip armoured, flame retardant low smoke (FRLS) extruded PVC type outer sheathed.

(d) Control cables shall be 1.1kV grade, heavy duty, stranded copper conductor, PVC Type-A insulated, galvanized steel wire armoured, flame retardant low smoke (FRLS) extruded PVC of Type - ST1 outer sheathed.

x. Special Properties:

All the above cables shall be conforming to the relevant Indian/IEC standard in general, with the following special properties:

(a) Oxygen Index of the outer sheath shall not be less than 29, when tested as per ASTM-D-2863.

(b) Temperature Index of the outer sheath shall not be less than 250 C, when tested as per ASTM-D-2863



(c) Halogen acid contents in outer sheath shall not be more than 20%, when tested as per IEC-60754.

(d) The maximum smoke density in percent light absorption should not exceed 60% in case of PVC compound and 20% in case of fire survival cables, when tested as per ASTM-D-2843.

(e) Oxygen Index of the outer sheath shall not be less than 29, when tested as per ASTM-D-2863.

(f) Temperature Index of the outer sheath shall not be less than 250 C, when tested as per ASTM-D-2863.

(g) Halogen acid contents in outer sheath shall not be more than 20%, when tested as per IEC-60754.

(h) The maximum smoke density in percent light absorption should not exceed 60% in case of PVC compound and 20% in case of fire survival cables, when tested as per ASTM-D-2843.

xi. Joints And Terminations

Materials of construction for a joint/termination shall perfectly match with the dielectric chemical and physical characteristics of the associated cables. The material and design concepts shall incorporate a high degree of operatingcompatibility between the cable and joints. The protective outer covering (jacket) used on the joints/terminations shall have the same qualities as that of the cable outer sheath in terms of ambient/operating temperature withstand capability and resistance to Hazardous environments and corrosive elements. No joints shall be allowed unless the cable drawn length is exceeded.

xii. Cable Identification

Cable identification shall be provided by embossing the following on the outer sheath:

(a) Manufacturer's name or trade mark (b) Voltage grade (c) Year of manufacture (d) Type of insulation. (e) Type of outer sheath e.g. "FRLS" etc. (f) ISI marks (g) Nominal cross sectional area of the conductor & no of cores (h) Sequential marking

xiii. Instrumentation cables

Cable Design And Construction

a. 650/1100v Grade Single Pair Twisted Instrumentation Signal Cable

b. Construction

(a) Conductor:

Each core shall be seven stranded annealed copper electrolyte grade conductor of cross section 1.5mm2 generally complying to IS-8130.

(b) Insulation:

Each core shall be provided with extruded HR PVC insulation conforming to IS:5831 Type 'C'. Insulation thickness shall be >=1.1 mm and shall conform to relevant IS/other standard. Color of insulation shall be Red and black in a pair.



(c) Twist:

Every 2 core shall be twisted to form a pair and number of twist shall be 10-12 per meter.

(d) Shielding:

The individual pair shall be shielded. Shield shall be Aluminium backed by Mylar tape bonded together side down helically applied with either side 25% overlap and 100% coverage. Minimum shield thickness shall be 0.06mm Drain wire shall be 0.5 sq mm multi stranded bare tinned annealed copper conductor. The drain wire shall be in continuous contact with aluminium side of the shield.

(e) Inner sheath:

Cables shall be provided with extruded HR PVC inner sheath as per IS 5831 type ST2. The color shall be black and minimum thickness shall be as per IS-1554 parts.

(f) Armouring:

Armouring applied over inner sheath shall be of galvanised steel wire 1.4 mm dia as per IS 1554 part I and IS 3975.

(g) Overall sheathing:

The cable shall be sheathed with extruded FRLS PVC type ST2 as per IS 5831. The shielding and sheathing shall be so done that it fits firmly to the cable and are easily removable without damage to cores. Color of sheath be blue. Thickness of the sheath shall be as per IS 1554 Part-I.

c. 650/1100v grade multi pair twisted instrumentation signal cables.

(A) General

Multi-pair twisted instrumentation cables shall be same as single pair shielded cable, except that the area of cross section of the conductor shall be 1.0 Sq.mm.

Following additional features shall be applicable:

(i) Shielding: In addition to individual shielding of pair, overall shielding shall be provided. Overall shield shall be Aluminium backed mylar tape helically applied with metallic side down either side 25% overlap and 100% coverage. Shield thickness shall be 0.075mm. Drain wire shall be similar to individual pair drain wire and shall be in continuous contact with the Aluminium side of the overall shield.

(ii) Twist: Overall twist of all pair shall be as per manufacturer standard.

(iii) Pair-Identification: Pairs shall be identified by numbered melinex tape applied over individual pair shield at interval not more than 250 mm. Conductor insulation shall be black and white for each pair.

d. 650/1100v Grade Two Core Control Cable

(A) Construction

(i) Conductor: Each core shall be seven stranded annealed tinned copper conductor of cross section 1.5mm2 generally complying to IS 8130.

(ii) Insulation: Each core shall be provided with extruded HR PVC insulation conforming to IS 5831 Type 'C'. Insulation thickness shall be as per IS-1554 (I) Color of core insulation shall be red and black.

(iii) Inner sheath: Cables shall be provided with extruded HR PVC inner sheath as per IS 5831 type ST2. The color shall be black. Thickness of sheath shall be as per IS-1554 (I).



(iv) Armouring:Armouring applied over inner sheath shall be of galvanised steel wire 1.4 mm dia. as per IS 1554 part I and IS 3975.

(v) Overall sheathing: The cable shall be sheathed with extruded FRLS PVC type ST2 as per IS 5831. The shielding and sheathing shall be so done that it fits firmly to the cable and are easily removable without damage to core. Colour of sheath shall be black. Thickness of the sheath shall be as per IS 1554 part-I.

e. 650/1100v Multi core Control Cables

(A) General

Multi core untwisted instrumentation cables shall be same as two cores unshielded untwisted cable.

xiv. Tests

a. Type Test

Cables shall be type tested quality. For each type and rating of cables reports on all type tests as per relevant standards, and carried out with in last five years from the date of bid opening shall be submitted.

These reports shall be for the tests conducted on the similar type of cables proposed to be supplied under this contract. These tests should have been conducted at an independent laboratory. If type test certificate are not available the same shall be conducted in the presence of the purchaser.

b. Shop Tests

The Cables shall be tested in accordance with relevant IS/IEC standards at manufacturers’ works in the presence of consultant /purchaser or his representative as given below:

c. Routine tests on each drum of cables.

d. Acceptance tests on drums chosen at random for acceptance of the lot shall be conducted in the presence of Consultant / purchaser or his representative.

e. Additional Tests

Following additional acceptance tests shall also be performed on each type of cables having outer sheath with improved fire performance (Category C1, Type FR/ Category C2, Type FRLS):

f. Oxygen index test (for both C1 & C2) – The oxygen index test shall be carried out as per ASTM D2863. The Oxygen index shall not be less than 29. All the additional tests shall be conducted in the presence of the purchaser.

g. Temperature Index Test (for both C1 & C2) - The measured value of temperature index shall be 21 at a temperature of 250°C.

h. Flame retardance test on single cable and on bunched cables (for both C1 & C2) - After the test, there should be no visible damages on the test specimen within 300mm from its upper end. After burning has ceased, the cables should be wiped clean and the charred or affected portion should not have reached a height exceeding 2.5 meter above the bottom edge of the burner, measured at the front and rear of the cable assembly.

i. Halogen acid gas evolution test (for category C2) – This test shall be as per IEC-754-1.The level of HCL evolved shall not exceed 20 per cent by weight.

j. Smoke density test (for category C2) – Smoke generation by outer sheath under fire as per ASTM D 2843. The cables shall meet the requirements of light transmission of minimum 40% after the test.

k. Test for rodent & termite repulsion property.



xv. Cable Installations

HV power cables shall be XLPE Insulated Power Cables of 22kV voltage grade. They shall be manufactured in accordance with IEC60502, having compacted, stranded Aluminium conductors, thermosetting material semi-conductive conductor screen, XLPE insulated, hand strippable thermosetting material semi-conductive insulation screen, copper wire screen, PVC sheath, aluminium wire armour and PVC black outer sheath.

LV power cables shall be XLPE or PVC insulated cables manufactured in accordance with IEC60502 having stranded, aluminium conductors, XLPE or PVC insulation, 0.6/1kV voltage grade, separation tapes and black PVC sheath, with galvanised steel or aluminium wire armour and black PVC outer sheath.

All cables shall be installed either on cable trays or racking in ducts, fixed to steelwork or laid in concrete trenches.

22kV cables from solar PV plant to CME 22kV Receiving Station shall be laid on over head trays. Cables inside control building shall be laid on trays in underground trenches.

Where cabling passes through floors, the cables shall be protected up to a height of 1.5 m from the floor level

The routes of cables shall be arranged to have an adequate clearance from other services. Cables shall generally be routed to avoid hot or fire risk areas, and to minimize the risk of damage from any source. Control cables shall be separated from power cables.

The cables shall be brought to motors and other devices using a conduit or a branch of cable tray for mechanical protection. The take-offs shall be located and supported so that the equipment is well accessible for maintenance work, and walkways will not be blocked.

The cross-section of power cable conductors shall be selected according to:

(a) Current-carrying capacity at actual mounting location and ambient temperature (correction factors accounted), when selecting the size of the wire for sub-circuits it must be considered as if the sub-circuits are fully loaded (6 Amps.). Minimum cable size per lighting sub-circuit shall not be less than 3/20 (1.5sq.mm min) copper wires. Minimum cable size for 15 Amps. Power socket receptacle connection shall not be less than 7/22 (2.5sq.mm min).

(b) Voltage drop of motor supply cables maximum 10% at starting and 3% when running. Voltage drop from MDBs to the farthest load point must not exceed 3 (three) Volts.

(c) Co-ordination with the fuse rating.

The power cables shall be mounted on cable trays in one layer stretched parallel. The cable shall be fixed to the tray at both ends, vertical parts, on both sides of elbows and wherever needed in order to have a neat execution. Metallic fixing devices or weatherproofed bundle ties shall be used for fixing.

The control cables may be tied in bundles to save space on the cable trays. The control cables may be installed on the other edge of the power cable tray if there is no special tray for control cables. Instrumentation cables shall always be installed in different trays than the power cables. Crimp connectors shall be used for connections of control cables with flexible conductors.

When the cables are brought into connection boxes, the sealing shall be done according to the protection degree of the original equipment. Cables coming from upper direction shall be sealed with a shrink plastic sleeve so that water cannot flow into the box along the cable sheath.



All apparatus connections and cable installations shall be designed and installed to minimize the risk of fire and any damage which may be caused in the event of fire. Enclosed vertical runs of cables shall be provided with fire stops to limit the spread of fire, and shall be sealed to prevent "chimney effects".

Wherever cables pass through floors, walls or other partitions, a suitable method of sealing shall be used. This sealing shall consist of one-hour fire resisting materials, the whole being arranged to prevent the spread of fire, smoke and fumes through each partition. Cableways containing a large number of cables shall be enclosed in one-hour fireproof material.Every cable shall be securely supported near its termination point, and in places where vertical runs pass through the floors, immediately above the floor.

Cables on vertical trays shall be fixed about every half a meter and on horizontal trays about every two meters and in all corner points.

Where cables are exposed to mechanical damage, sheet steel guards shall be provided to protect them.

Earth connections formed from wire braid screening shall be sleeved with green/yellow insulation. Cable type earth connections shall use green/yellow coloured insulated cable.

Phase identification shall be marked on cable terminals, single-core cables and at all connecting points.

xvi. Cable Trays

(a) All metal cable trays, ladders and racks, etc. shall be galvanized or otherwise protected.

(b) All ladder and trays shall be securely fastened to supporting steelwork and shall be adequately supported to prevent sagging.

(c) The cable trays as well as supports, joints, elbows and crossings shall be made of prefabricated standard parts. The type and supporting method of the cable trays shall be selected so that the maximum mid-span deflection is less than 1/300 of the span between supports, and permitted loads for the assembly will not be exceeded. The cable trays shall preferably be supported by brackets from one side only.

(d) All external cable trays shall be equipped with covers.

(e) Hanging wires or chains, or a single-rod suspend at the middle of the tray is not considered to be rigid enough.

(f) Cable trays shall be pre-fabricated ladder type, perforated type cable trays sheet steel with hot dip galvanizing furnished in standard length of 2.5 metres.

In areas, where acid/alkali ingration is likely to occur, glass reinforced plastic trays with fire retardant corrosion resistance properties shall be used.

(g) Cable trays shall be of standard widths.

(h) Cable trays shall be complete with all necessary hot dip galvanized sheet steel accessories such as coupler plates, ground continuity connections, nuts, bolts, washers, hangers, clamps etc. Also horizontal/vertical bends, horizontal / vertical Tee, Reducers, Horizontal cross-pieces, protective covers shall be supplied along with straight runs in order to take care of cable tray alignments in different routes.

(i) All fittings like horizontal/vertical elbow, horizontal crosspiece, reducer, horizontal tee etc. should be prefabricated.



(j) Cable trays, fittings & accessories as well as elbows, reducers, tees, crosses etc. shall be fabricated out of 14 gauge (2 mm thick) hot rolled mild steel sheets.

(k) Contractor shall supply 14 gauge (2 mm thick) perforated type hot rolled mild steel sheet covers for vertical cable shafts up to a height of 2.5 metres from floor level. The perforated covers used for the vertical raceways may be of one or more pieces along the width of the raceway, depending on the width of the raceway and shall be bolted to the structural framework of the raceway.

(l) The cable trays, fittings and accessories including all bolts, nuts, screws, washers etc. shall be hot dip galvanized after fabrication as per IS:2629. Galvanizing shall be uniform, clear, smooth and free from acid spots. Should the galvanizing of the samples be found defective, the entire batch of steel will have to be regularized at Contractor's cost.

(m) The amount of zinc deposited shall not be less than 610 gms per square metre of surface area and in addition the thickness of the zinc deposit at any spot whatsoever, shall not be less than 86 microns. The Owner reserves the right to measure the thickness of zinc deposit by Elcometer or any other instrument and reject any component, which shows thickness of zinc at any location to be less than 86 microns.

(n) Each 2.5 meter long section of all types of cable trays & each fittings like elbow, tees, crosses etc. shall be provided with 2 (two) nos. hot dip galvanized side coupler plates & associated bolts, nuts and washers on each side.

(o) The Contractor shall perform all tests necessary to ensure that the material and workmanship conform to the relevant standards and that such tests are adequate to demonstrate that the equipment will comply with the requirement of this specification.

(p) The tolerance on dimensions shall be in accordance with appropriate Indian Standards. The extent of the tests to be performed by the contractor in presence of owner shall include but not be limited to the following:

xvii Deflection Test:

A 2.5 meter straight section of each type of cable trays shall be simply supported at the two ends. A uniformly distributed load of 100 Kg per meter will be applied along the length of the tray. The maximum deflection at mid span shall not exceed 7 mm.

All the tests shall be carried out as per relevant Indian standards.

10.11A TESTING AND COMMISSIONING OF SOLAR POWER PLANT

INCLUDING MUTUALLY AGREED DAMAGES

10.11A.1 PERFORMANCE GUARANTEE TEST

The test to prove the Performance Guarantee shall be conducted at site by the contractor in presence of department’s representative. This test shall be binding on both the parties of the Contract to determine compliance of the equipment with functional guarantee. Any special equipment, instrumentation tools and tackles required for successful completion of the Performance Guarantee Test shall be provided by the Contractor without any extra cost to the Govt. The accuracy class of the instrumentation shall be as per the relevant clause of the documents.



10.11A.2 Performance Ratio Test:

a) This test checks if the power plant is performing at or above the performance

ratio agreed or warranted within the contract. A standard testing period would be

continuous testing for a minimum of five consecutive days. Typically, a minimum

irradiance will be defined and the performance ratio measured for the period in

which that irradiance is exceeded. The electrical energy generated shall be

recorded at the metering point. Input from all energy meters will be added to get

energy generation from Solar power plant. Energy meters shall have minimum

accuracy class of 0.2. This value of energy generated will be taken for calculation

of performance ratio (PR). Global incident radiation value shall be considered for

plane of array irradiation for calculation of PR.

b) The procedure for PG demonstration test shall be as follows:

Step – 1: A calibrated Pyranometer shall be installed by the contractor at the location mutually agreed by the Contractor and Deptt. The test report for the calibration shall be submitted by the Contractor for approval of the deptt. The output of this Pyranometer for test period of the PG test shall be made available at SCADA. Pyranometer shall be of secondary standard as per ISO 9060 classification. Required Software shall be supplied with Pyranometer to get required output.

Step – 2: “Actual energy” exported from the plant supplied by the Contractor shall be noted for time of the test (Minimum 5 days). This will be taken as A.C Yield in KWH in PR formulae.

Values calculated in Step-1 & 2 shall be used to calculate PR. The PR, usually expressed as a percentage, is used to compare PV systems independent of size and solar resource. The PR is expressed as:

PR =

AC Yield (kWh) X 100

{ Installed capacity (kWp) x plane of array irradiation (kWh/m²) }

c) For performance ratio calculations:

Effect due to variation of meteorological parameters e.g. ambient temperature, wind Speed, humidity etc. shall not be considered.

Generation loss due to grid outage (or power evacuation system which is not in the scope of the CONTRACTOR): the measured global solar radiation of the period of the outage of the power evacuation system shall be excluded to calculate average global solar radiation for the period of the PG test.



10.11A.3 Actual Performance ratio

The ACTUAL PERFORMANCE RATIO (APR) shall be equal to or more than the Minimum Guaranteed Performance ratio of 75%. The Performance Ratio Test should be conducted within 15 days of successful commissioning of the plant. PLANT having performance ratio below 75% shall not be accepted by GE (CME) Kirkee. In such case, the CONTRACTOR at its own cost shall “Make Good” the PLANT so as to be capable to meet the Minimum Guaranteed Performance ratio. This shall be verified by again carrying out the PR test, within a reasonable period of time. In case, the CONTRACTOR fails to achieve the minimum 75% PR ratio even in the repeated PR test, then without prejudice to any other right or remedy available GE (CME) Kirkee shall be entitled to forfeit the Security Deposit and Performance Guarantee and terminate the CONTRACT and the PLANT shall be taken over by GE (CME) Kirkee and rectify the same at the risk and cost of CONTRACTOR.

10.11A.4 GUARANTEED PERFORMANCE GUARANTEE (PR and CUF)

a) If the Contractor is not able to demonstrate Guaranteed Performance Ratio

during the three months he will be given one or more chance to demonstrate the

PG test. In that case the steps for PG test shall be repeated again as above.

b) Performance Ratio will be considered while taking over the plant from the

contractor which shall be minimum of 75%.

c) During the O&M period, at the end of every year starting from first year Value of

C.U.F (Co-efficient of utilization factor) shall be demonstrated by CONTRACTOR,

which shall be not less than value as specified. The capacity factor of a PV

power plant (usually expressed as a percentage) is the ratio of the actual output

over a period of one year and its output if it had operated at nominal power the

entire year, as described by the formula:

C.U.F =

Energy generated Per annum (kWh) X 100

{8760(hours/annum)x Installed capacity (kWp) }

10.11A.5 MUTUALLY AGREED DAMAGES

a) Annual Capacity Utilization Factor (CUF) less than Guaranteed CUF

For Annual C.U.F less than the guaranteed value as per the ‘Guaranteed Parameters’ of this document, the CONTRACTOR shall pay GE (CME) Kirkee Mutually Agreed damages (MAD) equivalent to loss of units (kWh) @ Power Penalty Rate (i.e. prevalent Forbearance price declared by CERC for Solar REC or prevalent purchased electricity cost of GE (CME) Kirkee per Kwh, whichever is higher).

Mutually Agreed Damages = (Power Penalty Rate in Rs.) X {(5000 kWp X 24 X

365 X (% CUF as guaranteed) – (KWh generated as invertor output for the

year)}

The CUF performance shall be verified at the end of every year of O&M and

recovery if any shall be affected immediately.



b) Annual Auxiliary power consumption more than guaranteed.

For Auxiliary power consumption more than the value as per ‘Guaranteed Parameters’ of this document, the CONTRACTOR shall pay Mutually Agreed damages (MAD) equivalent to the additional consumption of units @ Power Penalty rate per Kwh.

The auxiliary power consumption shall be verified at the end of each year of O&M.

10.11A.6 HANDING OVER -TAKING OVER

The work shall be taken over by CME upon successful completion of all tasks to be performed at site(s) on equipment supplied, installed, erected & commissioned by the CONTRACTOR in accordance with provision of Tender. During handing over complete project work, i.e. after FINAL ACCEPTANCE, the CONTRACTOR shall submit the following for considering final payment.

(a) All as- Built Drawings

(b) Warranty/ Guarantee certificates, test certificates etc.

(c) Inventory of spares at projects site

Immediately after taking over of complete project(s), the same will be handed over to the CONTRACTOR for operation & maintenance period.

10.11A.7 ERECTION, TESTING & COMMISSIONING

The installation shall be carried out by a contractor holding a valid license as required by the State Government Authorities. The contractor shall provide necessary documents required by statutory authorities and obtain the approval before taking up erection. It shall be the sole responsibility of the contractor in obtaining safety certificate / approval from local statutory authorities.

10.12 TESTING ON COMMISSIONING OF ELECTRICAL EQUIPMENT AND INSTALLTION (APPLICABLE FOR MAJOR ELECTRICAL EQUIPMENT LIKE HTVCB, RMU, TRANSFORMER, APFC PANEL ETC.) The testing and commissioning of electrical equipments at site shall be according to the procedure laid down below :- 10.12.1 All electrical equipment shall be tested, installed and commissioned in accordance with the latest relevant IS and code of practice published by ISI wherever available and stipulations made in the relevant general specifications. 10.12.2 In case IS are not available the tests shall be carried out in accordance with the latest standards and code of practice published by any other recognized standard institution or latest publication IEC. 10.12.3 The testing of all electrical equipment as well as the system as a whole shall be carried out to ensure that the equipment and its components are in satisfactory condition and will successfully perform its functional operation. The inspection of the equipment shall be jointly carried out at the factory premises by the officer nominated by the accepting officer & contractor to ensure that all materials, workmanship and installation conform to the accepted design, engineering and construction standards as well as accepted codes of practice and stipulations made in the specifications. The Contractor shall make necessary arrangement for inspection at factory premises in liaison with manufacturer without any extra cost to the Govt.



10.12.4 Testing of all major HT equipments such as VCB, RMU, HT transformer etc shall be carried out by the Electrical inspector and the contractor shall make all the arrangements for testing equipments as well as qualified testing personnel for testing . 10.12.5 Testing of all other equipments such as DG stes, Transformer, APFC panel, Water Pumps, Dosing pump/ system etc shall be carried out by the IEM and the contractor shall make all the arrangements for testing equipments as well as qualified testing personnel for testing . 10.12.6 The results of the test shall conform to the specification requirements as well as any specific performance data guaranteed during finalisation of the contract.

10.12.7 At site all equipments shall be energised only after certification by the

personnel performing the test that the equipment is ready for energising and with the

concurrence of the GE.

10 13 MANNING AND OPERATION OF THE 05 MW SOLAR ENERGY PROJECT 10 13.1 The treatment plant will be considered commissioned after the issue of provisional completion certificate. The work shall remain from the date of provisional completion under defect liability period as provided under condition 46 of IAFW-2249 for one year. 10.13.2 The “operation” and “maintenance and operation” of electrical and mechanical equipments such as Solar power plant etc maintenances of electrical panels and their accessories etc to make the system fully operational to the entire satisfaction of Garrison Engineer. 10.13.3 The contractor shall also be responsible for periodical cleaning of panels, removal and disposal of vegetation materials to a place as directed by Engineer-in-Charge. The place so decided by the Engineer-in-Charge shall be more than 500 M beyond the boundary gate. However the scope of “operation” and “maintenance and operation” does not include the following unless specifically included in the scope of “operation” and “maintenance and operation” else where in the tender documents :-

(a) Maintenance of Building (b) Periodical services of buildings. (c) Maintenance of under mentioned Internal/External Services :-

(i) Water supply (ii) Electric supply (iii) Sewage Disposal (iv) Roads/Paths & Culverts (v) Supply of water, electricity and diesel required during the “operation” and maintenance and operation” period of contract.

10.13.4 The contractor shall ensure that the premises around the building structures are kept clean and tidy complete all as directed by Engineer-in-Charge. 10.13.5 The contractor shall be responsible for maintaining a furnished office with telephone facilities in the laboratory building for the administration of “operation” and maintenance and operation” of the plant. The unit rate quoted for “operation” and maintenance and operation” shall be deemed to include for the same without any extra cost to the Government. 10.13.6 The Contractor shall submit a programme detailing the testing procedures of the plant and all its components, a training programme for the operators, and and a



training programme for practical operation and maintenance of the plant , for the approval of the Engineer-in-Charge herein after referred to as “Test Prior to Taking Over”. 10.13.7 Comprehensive test shall be carried out six months before the end of the defect liability period, aimed at examining the adequacy of all units involved in the process as well as all equipments, electrical and mechanical installations and pipe line works. Each item shall be tested separately and its adequacy tested in the frame work of the plant as a whole. 10.13.8 Where the “Test Prior to Taking Over” reveals faults, stemming from deficiencies, poor maintenance or other reasons, the contractor shall replace or repair the faulty items at his expense. The Contractor shall repair at his expense all the deficiencies and malfunctions pointed out by the Engineer-in-Charge within 60 days from the date of notice. If the Contractor not comply with the above the GE shall perform the necessary repairs at the Contractor’s expense. 10.13.9 The Contractor shall be required to provide a full training programme for the MES operators or representatives. . Practical training and operation shall be an integral part of the “Test Prior to Taking Over”. 10.13.10 Prior to Taking over, the Contractor shall examine the mechanical condition, including strength, noise, vibration, lubrication, corrosion protection and painting of the plant and shall repair any malfunction, abnormality, peeling of paint, replacement of bearings etc as necessary to prove to the Engineer-in-Charge’s satisfaction that the plant is in an acceptable state. The Engineer-in-Charge may carry out any further inspection of the work for purpose of Taking over. On termination of defect liability period, the GE will issue a certificate, certifying therein that all defects have been remedied and that “Tests Prior to Taking Over” have been satisfactorily completed. 10.13.11 The contractor shall prepare a detailed programme (referred to as O & M Manual) covering the operation and maintenance of the power plant as a whole. Notwithstanding the programme submitted and approved, the Contractor is deemed to have tendered for and covered in his price, the responsibility for operating and maintaining the treatment plant for the full period of the contract, thereafter handing it over as specified.

10.13.12 The O & M Manual shall include, in elaborate detail, all operating and maintenance procedures and activities which are required, advisable and/or necessary for the plant to achieve full compliance with the contractor requirements. The O & M Manual shall include interlia full explanations of all plant procedures and processes. The afore mentioned detailed programme shall be submitted to the Engineer-in-Charge for his approval within a period of one month from the commencement date of the contract for phase II. 10.13.13 The Engineer-in-Charge will check the programme and will return it to the Contractor within 15 days of receipt with his approval or comments and requirements for charges (if any). The Contractor shall make the requested corrections or changes and resubmit the full programme within a period of 10 days after receiving the Engineer-in-Charge’s comments. This procedure will be repeated until final approval is accorded by GE.

10.13.14 The Engineer-in-Charge reserves the right to call for revisions to the last submission, if in his or the GE’s opinion, some significant point or activity has been overlooked. 10.13.15 Three full copies of the approved O&M Manual shall be submitted to the GE.



10 13.16 GE may revise the O&M Manual to reflect any updates, changes or revisions it deems appropriate based interalia on its experience and as necessary to reflect any modifications or adjustments to the plant. 10 .13.17 As stated above, the Contractor shall in the frame work of this Contract, assume responsibility for operation and maintenance of the plant throughout the contract period including all days, nights, week-ends and holidays. 10.13.18 The Contractor shall be responsible for guarding, free prevention safety etc. Any damage caused by fire, accidents, theft etc shall be reinstated by the Contractor at his own expense. 10.13.19 The Contractor shall safeguard the plant from breaking, theft, breakage, damage and deterioration of any part of the plant. 10.13.20 The Contractor shall keep the as-Built documents and the O&M Manual up to date and in full conformity with all plant components currently in service. 10.13.21 During the O&M period, the Contractor shall promptly notify the GE in writing of any revisions, modifications or alterations which he, in his professional opinion believes should be made to the O&M Manual whether as a result of his additional experience in the operation and/or maintenance of the plant. 10.13.22 The GE shall have the right to perform any testing, sampling, analysis, inspection, evaluation of process or other procedure as and when it deems appropritate in order to ensure that the Operation and Maintenance Standards are being completed with by the Contractor, or for anyother reason which may seem appropritate. The Contractor shall cooperate with, and assist the GE with respect to all sch prodedure in any way which may be requested by the GE. 10.13.23 The Contractor shall employ sufficient staff, having expertise and training as required by applicable law, the O&M Mannual and as necessary or appropriate for full compliance with the Operating and Maintenance requirements. The Contractor shall not sub-contract his Operation and Maintenance Obligations, change any sub-contractors or expand the scope of work of any sub-contractor. 10.13.24 The works for manning and Operation shall also include the following activities :-

(a) Servicing of all solar equipment’s, HT / LT control system, Transformers weather monitoring equipment’s, SCADA system etc all as per OEM recommendations. (b) Every day cleaning of Solar PV modules by washing plants, sprays, brushes, tools and plants, any washing solutions as per OEM recommendations complete. (c) Checking ABT meter reading and recording in log book as per instruction given by Engr-in-Charge. (d) The Engineer/Electrician shall submit reports in soft and hard copy format as required by the Engineer in Charge. (e) Safety, security of all E&M equipment’s, solar panels, T&P and Sub Station complete all as directed by the Engineer-in-charge. (f) Area cleaning removing of grasses, bushes etc. as per the instructions of Engr-in-Charge.

SIGNATURE OF CONTRACTOR Dy Dir (Contracts) DATED : FOR ACCEPTING OFFICER



Appendix ‘A’ 11.1.1 CEMENT 11.1.1.1 GENERAL : Cement required for the work under the contract shall be procured, supplied and incorporated in the works by the contractor under his own arrangement. Cement shall be of tested quality and shall comply with the requirements mentioned in the drawings, SSR, IS Specifications as amended and particular specifications given hereinafter. A. Type of cement for the subject work to be procured and incorporated in work shall be Ordinary Portland cement grade 43/53 in accordance with IS- 8112 of 1989 (latest edition) or Portland Pozolana Cement conforming to : 1489 of 1991 unless otherwise mentioned of higher grade in structural drawings forming part of the tender documents.The contractor can use OPC/PPC-53 grade cement without any extra cost to the government. However, in water retaining structures OPC shall only be used. 11.1.1.2 SOURCE OF PROCUREMENT A. Cement will be procured by the contractor from any one of following main producers or other manufacturer approved by E-in-C’s Branch till date of receipt of tender :-

(a) M/s The Ramco Cements ltd. (Brand : Ramco) (For OPC 43 & PPC)

(b) M/s Sanghi Industries Ltd (Brand : sanghi) (For OPC 53 & PPC)

(c) M/s Cement Manufacturing Co Lts (Brand : Star) (For OPC 43, 53 & PPC)

(d) M/s Chettinad Cement Corporation Ltd (Brand : Chettinad) (For OPC 43, PPC & PSC)

(e) M/s Dalmia Cement (Bharat) Ltd (Brand : Dalmia cement) (For OPC 43 & PPC)

(f) M/s My Home Industries Ltd (Brand : Maha Shakti/Maha/Maha Shakthi) (For PSC, OPC 43 & PPC)

(g) M/s Heidelberg Cement India Ltd (Brand : MYCEM) (For PPC)

(h) M/s Zuari Cement Ltd (Brand : Zuari) (For OPC 43 & PPC)

(i)

M/s Parasakti Cements Ltd (Brand : Prasakti) (For OPC 43 & PPC)

(j) M/s Shree Guru kripa Cement (Pvt) Ltd (Brand : Sartaj) (For OPC 43 & PPC)

(k)

M/s Toshali Cements Pvt Ltd (Brand : Gajpati) (For OPC 43, PPC & PSC)

(l) M/s Dhruv Industrial company Ltd (Brand : Dhruv) (For OPC 43 & PPC)

(m)

M/s Prism Cement Ltd (Brand : Prism) (For OPC 43 & PPC)

(n) Lafarge cement (Brand : Lafarge) (For OPC 43 & PPC)

(o)

M/s Barak valley Cements Ltd (Brand : BVCL) (For OPC 43)

(p) The Associated Cement Companies Ltd (Brand : ACC) (For OPC 43 & PPC)

(q)

M/s Ultra Tech Cement Ltd (Brand : Ultratech) (For OPC 43, 53 & PSC)

(r) The India Cement (For OPC & PPC)

(s) Saurashtra cement (Brand : Saurashtra) (For OPC 43 & PPC)

(t) Century Cements (Brand : Century) (For OPC 43 & PPC)

(u) M/s OCL India Ltd (Brand : Konark) (For OPC 43 & PPC)

(v) Mangalam Cement Ltd (Brand : Mangalam) (For OPC 43 & PPC)

(w) Grasim Industries Ltd (Brand : Grasim) (For OPC 43 & PPC)

(x) Orient Cement (Brand : orient) (For OPC 43 & PPC)

(y) Andhra Cement Ltd (For OPC 43 & PPC)

(z) JK Cement (Brand : JK) (For OPC 43 & PPC)

(aa) Binani Cement Ltd (Brand : Binani) (For OPC 43 & PPC)

(bb) Jaypee Rewa Cement (Brand : Jaypee) (For OPC 43 & PPC)

(cc) Birla Corporation Ltd (Brand : Birla) (For OPC 43 & PPC)

(dd) Ambuja Cement (Brand : Ambuja) (For OPC 43 & PPC)

(ee) Shree Cement (Brand : Shree) (For OPC 43 & PPC)

(ff) J K Lakshmi Cement Ltd (Brand : J K Lakshmi) (For OPC 43 & PPC)

B. The Contractor shall furnish, the particulars of the manufacturer of cement alongwith the date of manufacture to the Garrison Engineer for every lot of cement



separately. The cement so brought shall be fresh and in no case older than 60 days from the date of manufacture.

Appendix ‘A’ (Contd..) The document in support of the purchase of cement shall be verified by the Garrison Engineer. Before placing the order for supply of cement by the contractor, he shall obtain written approval from the GE regarding name of manufacturer, quantity of cement etc. Cement shall be procured for minimum requirement of one month and not exceeding the requirement of the same for more than two months at a time. The cement shall be consumed in the work within three months after receipt. Cement shall conform to the requirement of Indian Standard specification and each bag of cement shall bear relevant ISI certification mark. The weight of each consignment shall be verified by the GE and recorded. The content of cement shall be checked at random to verify the actual weight of cement per bag. However the content of cement per bag shall be 50 Kg only subject to tolerance given in clause 9.2.2.1 and Annexure ‘B’ of IS -8112 of 89. 11.1.1.3 TESTING OF CEMENT A. The contractor shall submit the manufacturer’s test certificate in original alongwith test sheet giving the result of each physical test as applicable and the chemical composition of the cement or authenticated copy thereof, duly signed by the manufacture with each consignment, as per the following IS provision :- (a) Method of sampling hydraulic cement as per IS-3535-1986. (b) Method of physical test for hydraulic cement as per IS-4031. (c) Method of chemical analysis of hydraulic cement as per IS-4032-1985. The test certificate and test sheet shall be furnished with each batch of cement. The Engineer-in-Charge shall record these details in cement acceptance register to be maintained by him, which will be signed by JE (Civil), EIC, GE and the Contractors as given in the format hereinafter for verification. B. The contractor shall however, organise setting time and a compressive strength test of cement through designated laboratory on samples collected from the lot brought at site before incorporation in work. The contractor will be allowed to use the cement only after satisfactory compressive strength of seven days. To meet this requirement Contractor is required to keep minimum 20 days stock before any new lot brought at site which can be used in the work. The Contractor shall be required to remove the cement not meeting the requirement from site within 24 Hours. Seven day strength test will be relied upon to accept the lot of cement to commence the work. However 28 days compressive strength test will be the final criteria to accept/reject the lot. C. The GE shall carryout independent testing as per the tests mentioned in the `CEMENT SUPPLY/ACCEPTANCE FORM` of random samples of cement drawn from various lots, if sample fails in 7 days compressive strength, the testing shall be carried out through National Test House/ SEMT/ CME/ Regional Research Laboratories/Command Test Lab (CTL)/ Government Engineering College(Degree) as per IS -3535-1986 (Method of sampling hydraulic cement) and IS-4031 ( method of physical test for hydraulic cement) and IS-4032-1985 ( method of chemical analysis of hydraulic cement) referred to above. The decision as to where the testing of cement is to be done shall be taken by GE. In case the cement is not of requisite standard despite manufacturer’s test certificate, the contractor shall remove the total consignment from the site at his own cost after written rejection order of the consignment by the GE. D. The random samples as per relevant IS shall be selected by GE before carrying out testing. The record of such samples selected by the GE for testing shall be properly maintained in the `cement Testing Register’ giving cross reference to relevant consignment of cement and quantity received etc.



11.1.1.4 TESTING CHARGES: Cost of transportation of samples to the approved laboratory / test house and all testing charges including cost of sample shall be borne by the contractor. Appendix ‘A’ (Contd..) A. The contractor shall be required to set up adequate testing facilities at site to entire satisfaction of Garrison Engineer for conducting setting time test and compressive strength test as per IS codes referred to here in before for the samples collected from the lot brought at site. The tests shall be carried out jointly within 7 days of receipt of cement at site. These tests can alternatively be carried out at the Zonal Laboratory or any other recognised Laboratory so designated by GE. The entire cost of testing shall be borne by the contractor irrespective of the fact that the result are satisfactory or not. Recovery at the under mentioned rates shall be made for tests carried out in Zonal Laboratory of MES :- (a) Setting Time. : Rs. 100 per test per sample of cement. (b) Compressive strength for : Rs. 300 per sample of three cubes. sample of three cubes. 11.1.1.5 A. The Contractor shall submit original purchase vouchers for the total quantity of cement supplied under each consignment to be incorporated in the work. All consignments received at the work site shall be inspected by the GE alonglwith the relevant documents to ensure the requirements as mentioned hereinbefore, before acceptance. The original purchase vouchers and the test certificates shall be verified for subject contract and defaced by the Engineer-in-Charge and kept on record in the office of the Garrison Engineer duly authenticated and with cross reference to the consignment / control number recorded in the Cement Acceptance Register. The cement Acceptance Register shall be signed by the Junior Engineer (Civil), Engineer -in- Charge, GE and the Contractor. The Contractor shall maintain schedule of supply of cement for each consignment. Cement when tested as per IS 4031, initial setting time shall not be less than 30 minutes and final setting time shall not be more than 600 minutes. B. The Accepting Officer may order a board of officers for random check of cement and verification of connected documents during the currency of contract. 11.1.1.6 STORAGE / ACCOUNTING AND PRESERVATION OF CEMENT : A. Cement shall be stored In covered godown over dry platform at least 20 cm high in such a manner as to prevent deterioration due to moisture or intrusion of foreign matter. In case of store room, the stack should be at least 20 cm away from floors and walls. The stacking of cement shall be done as specified in relevant IS. The storage accounting and preservation of cement supplied by the Contractor shall be done as per standard engineer practice till the same is incorporated in the work and the cost of the same shall be deemed to be included in the unit rates/ amount quoted by the tenderer. The Engineer - in - Charge shall inspect once a day to verify that cement lying at site is stored, accounted preserved and maintained as per norms. The cement shall be stored so as to differentiate each tested and untested consignment separately with distinct identifications. If the GE is not satisfied with the storage/preservation of cement, he may order for any test(s) of cement as applicable for that consignment to ensure its conformity to the quality mentioned in the manufacturer’s test certificate. The Contractor shall bear the cost of necessary testing (s) in this regard also and no claim whatsoever shall be entertained. B. Staking of cement shall done as per relevant IS and as under :-



(a) Each cement consignment shall be stacked separately and removal shall be made on the basis of `First In First out’.

(b)Adequate top cover will be provided.

Appendix ‘A’ (Contd..)

(c ) Stacks in no case shall be higher than 12 bags. The maximum width of each stack shall be 3.0 m. If the stack is to be more than 7 or 8 bags high, the bags shall be arranged in header and stretcher fashion, ie. alternately lengthwise and cross wise so as to tie the piles together and lesser the danger of topping over.

(d) Adequate space shall be kept between two stacks.

C. Cement godown shall be provided with two locks on each door. The key of one lock of each door shall remain with the EIC or his representative and that of the other lock with the Contractor’s authorised agent at site of works so that cement is removed from the godown only according to daily requirement with the knowledge of both the parties. During the period of storage if any cement bag (s) found to be in damaged condition due to any reason whatsoever, the same shall be removed from the cement godown on written orders of the GE and suitable replacement for the cement bag(s) so removed shall be made and no claim whatsoever shall be admissible on this account. D. The Contractor shall procure the cement timely as required in accordance with CPM agreed between GE and the Contractor. The Contractor will forfeit his right to demand extension of time if the supply of cement got delayed due to his failure in placing order in time to the manufacturer. E. Cement shall be removed from the store only according to daily requirement with the knowledge of both the parties and daily consumption of cement shall be recorded in cement consumption register which shall be signed by the Engineer-in-Charge and the contractor. Cement constants given in Appx ‘A’ to E-in-C’s Branch letter No. 19280/E8 dated 03 May 1976 shall form the basis of consumption of cement for various items of works unless specifically indicated otherwise. F. In case the consumption of cement as per cement consumption register is found

to be more than the estimated quantity of cement due to whatsoever reason, the contractor shall not have any claim whatsoever for such excess consumption of cement.

11.1.1.7 MEASUREMENTS AND PAYMENT OF CEMENT A. The entire quantity of cement brought at site shall also be suitably recorded in the measurement Book for record purposes as ‘Not to be abstracted‘ before incorporation in the work and shall be signed by the Engineer-in-Charge and the Contractor. B. The payment shall only be allowed after production of original purchase vouchers, certified copies of test certificates from the manufacturer for each consignment and results of testing carried out in laboratory on receipt of cement (7 days compressive test) are found satisfactory after testing as specified hereinbefore. Cement shall be paid as materiel lying at site as per Condition 64 of IAFW-2249.Rate of cement given in SSR shall be applicable for cement irrespective of grade of cement specified for use in the work.



Appendix `A’ (Contd..)

CEMENT SUPPLY AND ACCEPTANCE FORM

Contract No. : Name of Work : Control No. : Date: Details of purchase: (i) Particulars of manufacturer : (ii) Details of supplier (if any) : Details of test certificate:

(i) No. and date :

(ii) Particulars of Issuing Authority :

Sl. No.

Nomenclature IS ref Sampling as per IS-3535-1980

Physical test as per IS-4031

Chemical analysis as per IS-4032

Remarks

1 2 3 4 5 6 7

*As ordered Remarks with Signature JE

Engineer-in-Charge

Contractor

Accepted/Rejected

Remarks of GE/Inspecting Officer/CE



APPENDIX ‘B’

SOURCE OF LOCAL MATERIAL STATION: PUNE (a) Bricks : Local (Best Quality). (b) Stone for masonry/ Road : Local (c) Stone aggregate for concrete : Local (d) Sand. : Local NOTES:

Sources indicated above are for guidance only. The contractor may at his discretion procure materials from other sources without any extra cost to Govt. provided they conform to / are superior to the samples of materials kept in GE’s office and source is approved by GE. Tenderer shall ascertain the actual position / exact location of source before submitting his tender and no additional payment shall be made on account of misunderstanding for its distance from site of works. The tenderer shall amongst other things also ascertain all information such as royalties, taxes, duties and other charges etc, on the materials and no additional payment shall be made on account of the foregoing.

Dy Dir (Contracts) (Signature of Contractor) For Accepting Officer

Dated : ____________



Appx ‘C’

LIST OF MAKES

Sr.No

Description Make

1 BLANK

2 Solar Inverters ABB/Schneider/TMEIC (Toshiba Mitsubishi )

3 Array Box, Fuse Box & Combiner Box

Trinity/Hensel/Weidmuller

4 Power Transformer/InverterdutyTransformers

ABB/AREVA/SIEMENS/Schneider/ Kriloskar

5 SolarCables Lapp/Top/Leone

6 HT Cable Polycab /Universal/KEI/KEC (RPG)/Havelles

7 LT Power & Control Cables Polycab /Universal/KEI/KEC (RPG)/Havelles

8 Communication Cables

Polycab/Finolex/Lapp/Leoni/Top/Sterlite/KEI

9 Isolator –horizontal central break with ES

ABB/Siemens/AREVA

10 PorcelainInsulators AdityBirla / IEC/Modern Insulator Ltd./ /BHEL

11 HT Termination Kits Raychem/Densen

12 Current Transformer Kappa//Vishal Transformer/ Mehru /CGL/Presice/ABB

13 Voltage Transformer Kappa/Vishal Transformer/ Mehru /CGL/Presice/ABB

14 HV Panel ABB/SIEMENS/SCHNEIDER

15 HV Breakers ABB/SIEMENS/SCHNEIDER

16 RMU ABB/SIEMENS/SCHNEIDER

17 Earth Electrodes (maintenance free)

Jef-Eco Safe/ Altec / JK / Indelec /DEHN

18 Earthing DEHN/VNT/JEF/

19 Lightning –ESE or conventional NIMBUS / LPI/ Indelec/ ERICO/Lamco /Oblum /ABB/DEHN

20 Fire Protection Equipment Nitin/ SafeEX/ Tyco

21 LV Panel Shivanjali/Vidyut/RSI /Swati/Lotus (with ABB/ Schneider/Siemens components)/ECS

22 LV Circuit Breaker ABB/Siemens/Schneider

23 Meters Schneider / L&T /Secure/

24 LightningArrestor Lamco/Elpro/Oblum/CG

25 LightingFixture Bajaj/Philips/Wipro/Havells/CGL

26 Lighting DB Havells/Anchor/Schneider/Legrand/MDS/ABB

27 Power DBs Havells/Anchor/Schneider/Legrand/ABB

28 SolarCableConnectors Multicontact / Phoenix for sunclicks

29 Cable glands Comet/ Braco / Hex

30 Lugs Braco/ Comet /Hex



LIST OF MAKES (CONTD…)

31 Cabletrays Inar Profile/Patny system/HB Engg

32 Cableties KSS weather resistantties(UV protected)

33 UPS (with Isolation transformer) APC/ Luminous/ ABB/Emerson/Numeric/Makes- Hitachi/TMEIC/EMERSON

34 Battery Exide/ Amararaja/

35 Battery Charger Amar raja/ HBL/Statcon

36 Weather Station As per SD specified make / as per Technical Specification. (a)Pyranometer – Kipp&Zonen SMP 11 (b) Hygrothermometer – RM Young/ (c) Rain Gauge – RM Young (d) Wind sensor –RM Young (e) Module Tempsensors – Campbell Scientific

37 Steel SAIL/ TISCO/IISCO/ RINL/ Essar Steel/ Ispat Industries/ JSW Steel/ Llyods Steel/ Jindal Steel & Power

38 MFM/TVM meters Secure/ Conserve/ Schneider

39 Analog/ Digital Meters L&T/Rishabh

40 MCCB/MCB ABB/SIEMENS/SCHNEIDER/Legrand

41 Terminals Blocks DC 1000V Phoenix/ ABB

42 Relays ABB/Siemens/GE/Alstom

43 Control switches / selector switches

Kaycee / L&T/ Siemens /Schneider/ Switrondevices

44 Fuse DC Copper bussman/ Littlefuse/ABB/ Feraz/Mersen

45 Fuse base DC ABB/ Phoenix contact

46 DC Disconnector ABB/ Socomec

47 Buzzer/ Annunciator/ Bell Alan

48 Push Button&Indicatinglamps Siemens/ Schneider/ L& T/ABB/ Teknic/

49 SPD Dehn/Phoenix contact

50 Diodes Paramount/Semikron/BHEL

51 ACSR Conductor Smita/ Gupta Power infra/ Hindustan Vidyut Products/ Apar industries

52 Clamps &connectors Exalt / Best & Crompton / Millind Engg

53 Socket CGL/ Anchor-Roma

54 Power pack Emersen

55 Trackers Scorpious/ Nextrack/Osolar/Justamp/ID mitech/Genious Trackers

56 Computer HP, Acer, Dell

57 Laser Printer HP, Epson, Canon

58 Water Pump Kirloskar, Shakti



Notes: –

(i) Materials to be incorporated in the work shall be superior/1st quality of the makes given above.

(ii) Items shall be considered whichever is applicable only.

(iii) Sources indicated are only for guidance and approval of the Garrison Engineer shall be taken prior to procurement of materials and its incorporation.

SIGNATURE OF CONTRACTOR DY DIR (CONTRACTS)

FOR ACCEPTING OFFICER



SL Page No 160 to 162

Appendix D

Dy Dir (Contracts) (Signature of Contractor) For Accepting Officer

Dated : ____________

ca no- cepz/kke/token-27 of 2017 -18 serial page no- 69 ... · preambles to the various rates given...

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