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30 KVA TWIN DIESEL ENGINE DRIVEN GENSET IN A SKID MOUNTEDHUT WITH ACOUSTIC ENCLOSURE

Water cooled, D.G. Set capable of developing 24 KW /30 KVA at 3 phase, 0.8 power factor, 415 volt, 50 Hz and running at 1500 rpm under NTP conditions as per IS: 10,000or BS: 3514 or ISO: 3046 or latest. The twin genset should be placed inside the hut whichshould be an acoustic enclosure. Each genset will consist of items as per specificationsgiven below:

1.0 DIESEL ENGINE:

Naturally aspirated, water cooled, Vertical in-line, four stroke, diesel oil engine capableof developing suitable horsepower to drive the alternator when running at 1500 rpmunder standard reference conditions of atmospheric conditions of atmospheric

temperature of 27 degree Celsius, altitude not exceeding 150 meter above mean sea level,relative humidity 60% at 27 degree Celsius. The engine should be suitable for continuousduty & capable of developing 10% in excess of its rated output at its rated speed for a

period of 1 hour in any period of 12 hours continuous running without undue heating or any other mechanical trouble. The engine should be anti clockwise while looking fromthe flywheel end and should conform to IS: 10,000 or BS: 3514 or ISO: 3046 or latest.

The engine should comprise the following standard accessories such as-

1.01 Flywheel1.02 Fuel and lubricating oil filter 1.03 Heavy duty oil bath type air intake filters in lieu of standard.1.04 Lubricating oil pressure gauge1.05 Tachometer 1.06 Starting handle1.07 Standard set of spares1.08 12 volt of electric starting equipment (preferably LUCAS TVS make) fitted to the

engine and comprising of starter, alternator and starting ring fitted to the flywheel.1.09 Radiator with water pump1.10 Safety guard for coupling and other moving components.1.11 Fuel tank of capacity to run the genset for continuous 12 hours.1.12 Exhaust silencer with spark arrestor

The genset should be equipped with engine low lube oil pressure with indication displayof 12 volts red lamp in control panel.

1.01 The engine should be Kirloskar, Greaves, Cummins make

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2.0 ALTERNATOR:

Brushless type alternator of 30 KVA rating when coupled to water cooled engine willdevelop 30 KVA at 3 phase, 0.8 power factor, 415 Volt when running at 1500 rpm under

NTP conditions.

The alternator shall be of the following makes:Kirloskar, NGEF, Crompton Greaves, AVK-SEGC (as per specialized items list, sl. no.11 of Annexure B).

Technical specifications of the alternator will be as follows:

i) Rated output : 30 KVAii) Rated voltage : 415 Viii) Phases : 3 (4 wire)iv) Type : Brushless

v) Frequency : 50 Hzvi) Rated power factor : 0.8 (lagging)vii) No. of Poles : 4viii) Class Insulation : Class Fix) R.P.M. : 1500x) Phase sequence : UVWxi) Conform to : IS: 4722/1968, IS: 13364 (Part II) /1992, BS: 5000 (Part 99),

VDE 0530 (1984)and IEC: Pub 34-l- 1983xii) Rating : Continuousxiii) Connection : Y (Star)xiv) Ambient Temperature : 40 0Cxv) Alternators Internal : IP 23

Protection (Enclosure)xvi) Alternators terminal : IP 54

box protectionxvii) Amplitude of permissible : 100 Micron

vibration at no loadxviii) Excitation System : Brushless, self-excited and self-regulatedxix) Mounting : Foot mountedxx) Permissible voltage : + 2%

Variation at rated KVA,speed and PF

xxi) Permissible Frequency : + 2%variation at rated KVA,

speed and PFxxii) The brushless alternator should be double bearing type and composed of 3 PhaseAC exciter armature and exciter field, rotating diodes, surge suppressor, automatic staticvoltage regulator with voltage adjuster potentiometer, main field windings and stator windings.

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xxiii) The alternator should be capable of sustaining a 10% over load for one hour in any12 hours operation.xxiv) The alternator should be capable of sustaining short circuit current 3 to 4 times thefull load current for 3 seconds.xxv) Harmonic distortion factor should be less than 3 % at no load to nominal power

factor.xxvi) Motor Starting capability of the alternator should be twice the rated current of thealternator for not less than 20 seconds.xxvii) Alternator shall be capable of withstanding any damage when the speed of engineis 1.2 times the rated speed for two minutes.xxviii) Automatic voltage regulation shall be 0.5% to 1.0% from no load to full load and

power factor 0.1 to 1.0.xxix) The surge suppressor should withstand a high voltage of 1600 volt.xxx) Alternator should be capable of operation over a range of 10% of rated voltage.xxxi) Alternators are to be mounted on anti-vibration pads.xxxii) Alternator cable terminals are to be connected in cable terminal box which

comprises 4 nos. of 100 Amps rated tinned copper bus bar of 200 mm length mounted onsheet molding compound (SMC) supports.xxxiii) Cable terminal box should be suitable for 4 core x 10 mm2 PVC insulatedarmored copper cable [Size of box: 300 mm x 200 mm x 150 mm]. Cable should beterminated using proper size of gland and tinned copper sweating socket.xxxiv) The alternator should be provided with two grounding terminals with threaded

bolts for connection to grounding grid.xxxv) Lifting hook (s) shall be provided for lifting the alternator.xxxvi) The alternator and AVR should be suitable for humid and corrosive atmosphere.xxxvii) The following information should be provided by the bidder along with thequotation:a) Unbalanced current carrying capacity

b) Efficiency of alternator at 25%, 50%, 75% and 100% loadc) Power factor of the alternator at 25%, 50%, 70% and 100% loadd) Alternator reactances:# synchronous reactance# transient reactance# sub-transient reactancee) Motor starting capability of alternator

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3.03 Specifications of Control Panel:

1. 125 Amps Fuse switch unit with 63 Amps HRC fuses and rupturing capacity of 50 kA,make: GEPC / L & T / Crompton Greaves / Siemens- 1 No.2. Discriminating type Residual Current Device (RCD) / Residual current circuit breaker

with integral overcurrent protection (RCBO) with following specification- 1 no.:

# Rated voltage: 415 VAC, 50 Hz# Rated current 63Amps# No of poles: 4 (3P+1N)# Sensitivity: 300 mA# Short circuit capacity (making and breaking): 10 kA# Overload protection: 0.4 to 1 x In# Short circuit protection: 3 to 10 x In# Should conform to: IS 12640 (2001)- Part 2, IEC 61009-1# Tropicalization: Treatment 2 (RH 95% at 55 0C).

Make/ Brand: LeGrand, Merlin Gerin, SiemensRCD/ RCBO should be suitable for motor starting capability [C-curve].RCD/ RCBO shall be provided with a test and/or reset push button to check its trippingcircuit. RCD/ RCBO is required as leakage current protection for delayed trip for discrimination with other down stream devices.3. Moving iron A.C. voltmeter, Range (0-500V), Size: 96 mm x 96 mm-1 No. Make:Automatic Electric Industries Ltd.4. Voltmeter selector switch: 4 position (OFF, RY, YB, BR)-1 No. Make: Kaycee5. Digital frequency meter, range: 45-55 Hz, 230 V, fitted with vibration proof gasket,Size: 96 mm x 96 mm -1 No. Make: Automatic Electric Industries / Rishabh Instruments.6. Current Transformer, resin cast C. T. Ratio-65/5 A, Burden 15 VA, Accuracy Class 1(for ammeter and power factor meter) - 3 Nos. Make: A.E. Ltd /Kappa.7. Moving iron AC ammeter, CT operated, Range (0-200) A, Size: 96 mm x 96 mm-1 no.Make: A.E. Ltd.8. Ammeter selector switch with 4 position ( OFF # R # Y # B )

Make: Kaycee -1 No.9. Power factor meter: Range: 0.5 lag - 1.0 # 0.5 lead, Size: 96 mm x 96 mm # 1 No.Make: Automatic Electric Industries.10. Control Fuses for protection of voltmeter, frequency meter and power factor meter which require 3 sets of fuse carrier and base, Fuses: type NS 4, Rating # 4 Amps, Make:GEC / Alsthom.11. Busbar: Suitable length of 4 Nos. electrolytic grade high conductivity aluminum

busbar of 100 Amps rating. Material: E91E#WP as per IS: 5082 - 1969 for incoming andoutgoing feeders. Busbar support should be of non#hygroscopic material (solid mouldedcompound-SMC) and should have superior electrical resistance and fire resistance

properties. Busbar temperature should not exceed 85 0C. Busbar should be capable towithstand short circuit fault level of 50 kA. Bus bar should be insulated with colour coded heat shrinkable PVC sleeves. Make: Kappa / A. E. Ltd.12. LED indication lamps for incoming power - 3 nos.

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13. Automatic voltage regulator suitable for offered alternator.14. 2 Nos. of separate earthing points are to be provided on the panels.15. Cable gland suitable for 4 core x 10 mm2 PVC insulated armored copper cable fittedin bottom detachable gland plate. Quantity: 2 nos.16. Eye hook (s) shall be provided for lifting of panel.

NOTES (Alternator and Control Panel):

i) i) The bidder shall submit all indicative power and control wiring diagram for 30 KVAalternator.ii) Offered alternator should be of proven design / model.iii) Bidder shall submit the following information regarding alternator along with theoffer failing which offer is liable for rejection:# Frame size# Dimensional drawing# Technical datasheet

# Catalogueiv) Alternator and control panel are to be guaranteed for period of 12 months fromthe date of commissioning against any manufacturing defects.v) Guaranty Certificate shall be submitted at the time of delivery of alternator andcontrol panel.vi) Test certificate of alternators shall be furnished at the time of delivery of alternator.vii) Bidder shall submit the drawings (Dimensional, schematic, GA, component layoutand wiring layout) of control panel to OIL on placement of order and shall proceed for manufacturing of the panel only after getting due approval from OIL.viii) Packing should be adequate to avoid ingress of moisture and transit damage.ix) Ten sets of control circuit diagram of control panel and commissioning cummaintenance manual for alternator should be provided along with the material.x) Any items/ points not included in the specifications but necessary for efficient controland operation of the alternator shall be stated by the bidder.xi) Spare parts list along with the price should be provided along with the quotation.

4.0 SKID AND COUPLING:

The engine and alternator are to be directly coupled to each other through #Unique# or #Fenner Flex# type flexible coupling and both be mounted on common skid base framefitted with special vibration isolators for making the DG set vibration free.

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5.0 SKIDDED HUT:

The twin gensets (Engine, alternator, control panel, fuel tank and other auxiliaries for each set) with skid should be placed in an oilfield skid mounted hut with enclosure in allsides and sliding door. The placement of each skid mounted set should be on separate

channels which are welded on the base skid of the hut and be bolted with 6 nos. anti #vibration mounting pad and 4 nos. jack bolt. The control panel and HSD tank should be placed on separate frames at a height above the fuel pump of the engine. We haveenclosed a general arrangement for the skid mounted generating set as per drawing noOIL/8030. However the supplier may have separate/ modified hut to include twin gen setwith acoustic enclosure in line with our drawing which should have to be quoted alongwith the offer for our approval. The arrangement should be such that the operators &maintenance crew can enter and move inside the hut for normal inspection of thegenerating set. Provision should also be there to take the generating set outside in case of failure.

The hut should be complete with internal wiring for illumination. There should be 1(one) no. 15 Amps MCB, 1 (one) no. switch board and 2 (two) nos. 40 watt tube lightfitting [complete with lamp, starter and choke] for lighting circuit. Wiring for lightingsystem should be run through PVC conduit. The internal cabling of the hut shall alsoinclude power and control wiring between control panel and alternator with proper sizecopper cable. The cables should be terminated using gland and tinned copper sweatingsockets and run through guard pipe. Alternator body should be earthed to the GI strap inthe back side of the control panel using 3/8 inch G.I. wires. Nuts/ Bolts are to be providedwith alternators and control panel with earthing connection.

The hut should be complete with the following and these should be placed between twocontrol panels and mounted rigidly on separate frame. Suitable electrical connection with4 core x 10 mm2 PVC insulated armored copper cable between control panel to incomer (main) switch and then to changeover switch shall be done. Main switch, change over switch, control panel and alternator shall be interconnected with 3/8 inch GI wire for earthing. There should be provision for connecting common points of earthing system tolocal earth electrodes.

a) On load change over switch: 1 no.415 Volts, 100 Amps, 3 phase (with neutral), 4 poleMake: GEPC / L & T / Crompton Greaves / Siemens

b) Wall mounting type fuse switch unit with HRC fuse and SM type fuse holder: 2 nos.415 Volts, 63 Amps, 3 phase (with neutral)Make: GEPC / L & T / Crompton Greaves / Siemens

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6.0 ACOUSTIC ENCLOSURE:

The complete twin generating sets in the skidded hut should be acoustic enclosure.Should enclose valid Certificate from Central Pollution Control Board for acoustic

enclosure as per the Environment (Protection) Second Amendment Rules, 2002, vide

notification G.S.R. 371(E), dated 17th May, 2002, at serial no. 94 (paragraph 1 & 3).The maximum permissible sound pressure level for the DG sets with rated capacity shall be 75 dB(A) at 1 metre from the enclosure surface.

The complete arrangement drawing of the gensets inside hut with acoustic enclosureshould be forwarded to us for approval once order is placed.

7.0 PRE-REQUISITES FOR BIDDER:

a) The bidder should be an OEM or authorised dealer of OEM for engine, alternator or reputed assembler for Generating sets. b) If the bidder is an OEM of engine or authorised dealer of engine, he must purchase theother items from OEM of other items or authorized dealer of the other items and viceversa. In that case OEM or authorised dealer of engine or other items, as the case may be,must provide the documentary evidence from the OEM or authorised dealer of other items or engine from whom the purchase would be made along with the bid. The

purchase documents of engine or other items from the OEM or authorised dealer must besubmitted along with the supply of materials.c) If the bidder is an assembler of gensets, he must purchase the all equipment fromOEMs or authorised dealers. In that case the assembler must provide the documentaryevidence from the OEMs or authorised dealers of equipment from whom the purchasewould be made along with the bid. The purchase documents of engine or alternator fromthe OEMs or authorised dealers must be submitted along with the supply of Rig. Theassembler must furnish the information that the workshop facility for fabrication, loadtesting etc. are available with them. The bidder other than OEM must also furnish thefollowing undertaking from the OEM:"Date of manufacture, make, model, Sl. no., test certificate, literatures and part books of

all the equipment will be supplied if order is placed on the bidder."d) If the bidder is an authorised dealer of OEM for engine then he must furnish theexperience certificate that he had supplied minimum 15 nos. similar type of generatingsets in last 5 years stating the following information:# Capacity of each supplied engine or genset# The name of clients to whom these engines or genset were supplied and withcertificates that these are running satisfactorily.e) If the bidder is an assembler, then he must furnish experience certificate that he hadassembled & supplied minimum 15 (five) nos. of gensets in last 5 years giving thefollowing information:# Capacity of each supplied genset# The name of clients to whom these gensets were supplied and with

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Certificates that these are running satisfactorilyThe bidder must give assurance that after sales service in respect of engine and other equipment will be provided by their respective OEMs or authorised dealers.f) The bidder must undertake and confirm from OEMs that the equipment to be suppliedare not going to be obsolete for next 10 years and provision for supplying spares of the

equipment to be continued.

8.0 SPARE PARTS:

Spare Parts list for two years normal operating of the generating set should be suppliedalong with the materials. Item-wise breakdown price of spares should also be provided.Spare parts should be available for minimum 10 years from the date of delivery of

materials.

9.0 PARTS LIST, INSTRUCTION MANUAL & DRAWINGS:

a) Supplier shall provide one set each of spare parts list, operator#s instruction manualand workshop maintenance manual covering all the items along with each generating set. b) Supplier shall provide one set of drawing showing installation details of the generatingset. Oilfield type skid, wiring diagram for the control panel (inclusive of float charger)and wiring drawing between the alternator and control panel shall be provided with eachgenerating set.All electrical drawings submitted shall be corrected and final drawings after installation

and commissioning.c) Supplier shall provide a list of recommended spare parts for two years normaloperation along with the materials.d) The following should be provided along with the set :

# Dynamic load# Static load# Any unbalanced load

10.0 INSPECTION AND TESTS:

a) The plant and materials may be subjected for inspection during manufacture at OIL#sdiscretion but such inspection shall not relieve the supplier of his responsibility to ensurethat the equipment supplied is free from all manufacturing and other defects andconforms to correct specifications. Supplier will be notified in advance, if it is intended toinspect plant or materials.

b) Pre-dispatch inspection of all the sets shall be carried out by OIL#s representative atthe works of manufacturer. Full load testing of the generator sets for output and

performance shall be carried out in presence of OIL#s representatives to their satisfaction. Supplier/ manufacturer shall accordingly arrange for inspection and intimateOIL well in advance.

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11.0 TEST CERTICICATES:

Detailed records and certificates of the foregoing tests should be submitted to us. Thecertificates / records shall be supplied in quadruplicate and those for electrical equipmentshall be endorsed #suitable for use in the climatic conditions specified#. Supplier should

also certify that spark plug cables are protected and possibility of spark is completelyeliminated.

12.0 PACKING:

The packing shall be sufficiently robust to withstand rough handling/ transit damage.Boxes/ packing cases containing electrical equipment shall be water # proof lined.Control panels in particular should be packed with sufficient care (with shock/ vibration

proof lining) to prevent transit damage. Loose components shall be packed separately.

13.0 PERFORMANCE GUARANTEE:

10% of the ordered value shall be given as performance guarantee in the form of bank guarantee for a period of 12 months after commissioning or 18 months after commissioning of 18 months from the date of dispatch. The bank guarantee will bereleased after successful completion of guarantee period.

14.0 Any items/ points not included in the specifications but necessary for efficientcontrol and operation of the alternator shall be stated by the bidder.

14.0 QUANTITY:

The required quantity = 03 (Three) Nos.*************