specification no. f.p - 7.2 (revised in march 2010...

SPECIFICATION NO. F.P - 7.2 (Revised in March 2010)

SPECIFICATION FOR 600/1000V GRP PRIMARY FEEDER PILLARS TYPES A (2000 AMPS.), B (1000 AMPS) & C (500 AMPS)

1.1 Standard specifications

The primary feeder pillars shall conform to the latest edition of IEC 60439 or any other equivalent international standard, which shall be subject to the approval of the Authority.

1.2 Site Conditions

The pillars shall be installed outdoors in UAE in salt laden dusty atmosphere where the maximum humidity of 100% and maximum ambient temperature of 50 deg. C can be experienced. The pillars shall be suitable for continuous operation at the above site conditions.

1.3 Scope and nature of work

The specification provides for design, manufacture, test at manufacturer's works in presence of FEWA representatives, suitable packing, transportation and off-loading at site of works or FEWA stores in satisfactory condition and proper stacking as directed by FEWA.

The pillars shall be of outdoor substation, dwarf type, the dimension should be such that it can accommodate all accessories and equipments keeping in view the safe distance from the live parts and phase to phase clearances according to the international standards, for use on 433 volts, 50 Hz, 3 phase, 4 wire supply system.

1.4 Constructional requirements

1.4.1 Enclosures

The enclosure box shall be of glass reinforced polyester (GRP) of moulded type using high quality right grade of raw materials to suit severe weather conditions. The fibre glass content of GRP shall not be less than 450 gm/sq.metre/mm thickness. The enclosures shall be manufactured by hand lay up process in approved moulds or any other approved process so as to ensure smooth finish on mould side i.e., on external face and reasonable smooth finish on internal face. There shall be confluency in the product equality and finish on surfaces.

The wall thickness of enclosure should not be less than 4mm and 6mm at point of stress so that it can firmly withstand the shocks due to short circuit and any other causes. Ribs and stiffeners shall be provided wherever necessary.

The following features must be available with the feeder pillar enclosure:

i) Access doors shall be of close fitting with handles which positively hold the doors when turned.

ii) The doors should be provided with suitable approved gasket to prevent entrance of moisture and humidity.

iii) The feeder pillar shall be provided with pad locking facility and the Authority will arrange the pad lock and the master key.

FP - 7.2 ( of 16)

iv) Suitable ventilating arrangement should be provided for the enclosure.

v) The GRP laminates shall have following mechanical properties:

- Tensile strength : 80 Mpa as per ISO/R527-66 - Impact strength : 40-50 KJ/m2 as per ISO-179-82 or equivalent

vi) Shall be non hygroscopic and shall not warp under humid conditions.

vii) Shall be resistant to ultra violet radiation.

viii) The construction of pillars shall ensure a degree of protection conforming to IP 42.

ix) External finish should be plain, semi gloss light grey gelcoat finish to RAL 7032.

x) Roof or top of the enclosure shall have sufficient slope to drain rainwater and shall be moulded in one piece.

xi) It should be fire retardant, self-extingushing to DIN 4102 class B2.

xii) Enclosure should be provided with nameplate mentioning details such as current rating, voltage rating, type, serial no., year of manufacture, name of manufacturer and the words “Property of FEWA, UAE” etc.

xiii) The spacing between center to center of the fuse bases shall not be less than 140 mm.

xiv) Should be provided with lifting arrangement, earthing bolts at two points and cable gland plate (with opening at the bottom) for fixing with screws and also foundation bolts as per International Standards. Foundation drawing shall be provided.

1.4.2 Danger and Name Plate

Danger plate in both Arabic and English languages approved by FEWA shall be fixed on the doors. The words "Property of FEWA-UAE" should either be embossed on the enclosure or written clearly on a separate plate of approved design to be fixed on the enclosure. Paint quality shall be good and durable.

The danger plate shall be as per the drawing enclosed with this specification.

1.4.3 Busbars and Fuse Assembly

The busbars and connections shall be of tinned copper of suitable dimensions and shall be able to carry the specified currents continuously at 50 deg. C ambient and allowable temperature rise as per relevant IEC. The busbar connections shall have a generous contact area over the busbar, the faces shall be machined to close tolerances to ensure good electrical contact including connections to the fuse incoming connection. Horizontal and vertical barriers shall be used or the busbar shall be completely shrouded, if the busbars are not insulated. Insulation between the busbars and body should be of approved type and stated in the guaranteed particulars.

FP - 7.2 ( of 16)

HRC fuse links, fuse bases and supporting rails shall be provided as per IEC 60269, DIN 43260, DIN 57636 & VDE 0636, VDE 0660, DIN 43623. Fuse links and fuse base shall be NH type, size 2, class of operation of fuses shall be gL as per the above specifications and shall be tested as per relevant international standard. Contacts and connections of fuse bases shall be rated at 400 Amps irrespective of sizes of fuse links. The fuse links shall be rated at 400, 300 and 200 amps as mentioned in relevant clauses.

All fuse contacts shall be silver plated or silver faced. Busbars must be clearly marked or painted (in two narrow strips on either side) to show the Red, Yellow, Blue phases and neutral and earth. They should be horizontally mounted with the same sequence of red at top and earth bar at bottom. Fuse gear provided must be of approved reputable manufacture. Relevant labels for ammeters, voltmeters, C.T.s shall be provided. The requirement of fuse links shall be as per bill of quantity.

1.4.4 Mounting arrangement

Suitable mounting arrangement of pillar shall be provided and shall be shown clearly on foundation drawing to be supplied by the manufacturer during tendering and should include grouting bolts, nuts, washers etc.

1.4.5 Earthing Arrangement

Approved earthing arrangement of copper earthing bus of specified size for connecting the armours of cables to earth bar shall be provided as per the requirement of the type of feeder pillar. Adequate size of solid removable link between earthing bus and neutral bus shall be provided. All non-live metallic parts shall be internally connected to the earth bar. Two earth terminals shall be provided which shall be connected to the earth bar.

1.5 Special Tools

Any special tool if required, for working in the feeder pillar has to be provided with each unit. Tenderers are required to state the same during tendering.

1.6 Testing

Every feeder pillar is to be routine tested according to the relevant specification. The routine tests should include AC voltage withstand test at 3.5 KV for one minute for main bus and 2.5 kV for one minute for auxiliary circuit besides other routine tests. Certified copies of the type test certificates not older than seven years for the complete feeder pillar and main component shall be supplied along with the offer. If type test certificates which are acceptable to FEWA are not enclosed along with the offer, Authority reserves its right to ask the tenderer to conduct all or any of the type tests as per the relevant standard in presence of FEWA inspectors at no extra cost to FEWA. Routine tests on ten percent of the lot will be repeated in the presence of FEWA representatives at the manufacturer's works. The supplier shall make provision in his offer to bear all costs that are incurred in carrying out these tests to the satisfaction of FEWA. However, costs towards travel, accommodation etc. of FEWA representatives shall not be included in the quoted price.

1.7 Requirements for Individual Feeder Pillars

1.8 Type A : 2000 Amps, feeder pillars FP - 7.2 ( of 16)

1.8.1 Rating

The pillar shall have a continuous rating of 2000 amps under the specified conditions. Two numbers of bars of size not less than 800 sq.mm each shall be provided for each phase busbars. One number of bar of size not less than 800 sq.mm. shall be provided for neutral busbar. One number of bar of size not less than 500 sq.mm. shall be provided for earth busbar.

Any sizes of phase, neutral or earth bus bars, other than specified above shall be subjected to the approval of the Authority. The thickness of all phase, neutral and earth busbar shall not be less than 10 mm. It shall have short circuit capacity of 30 KA or more for at least 1 sec. as per IEC 60439.

1.8.2 The pillars shall be equipped with

a) Incoming arrangements of 7 single core, 630 sq.mm stranded copper cables, XLPE insulated (two cables for each phase and one for neutral cable). The arrangement should include knockout in the gland plate (which can be easily knocked out with one push/tap of the hammer), with glands for the cables with suitable link units of 2000 A rating, together with suitable clamping devices for mounting of the cables.

b) 6 Nos. outgoing circuit arrangements suitable for 3 1/2 x 300 sq.mm stranded aluminium cables per circuit, including suitable clamping devices, knockouts, glands and facility to connect cable armour by flexible copper wire to earth busbar, together with HRC fuses of 400A rating. The fuses shall be NH type, size 2, class of operation gL as per IEC 60269, DIN 43260, DIN 57636 & VDE 0636 and shall be tested as per relevant international standard. The requirements for fuse links shall be as per bill of quantity.

c) One voltmeter together with seven-position selector switch to read voltages between phases and phase to neutral.

d) Three single phase amps. meters 0-2000 ampere range with matching current transformers to read the incoming current on each phase, with facility to read maximum current over a period of time with a reset arrangement. All current transformers shall be provided with nameplates with its serial number, ratio, burden, type number and accuracy class.

e) 6 Nos. single phase amps. meters 0-500 ampere range with matching current transformers to read the outgoing current on one phase from each outgoing cable, with facility to read maximum current over a period of time with a reset arrangement. Fixing of meters and C.T.s, Should be done with suitable arrangement approved by FEWA. The meters should be read clearly from out side through unbreakable glass windows ,which shall not fade / defuse with time. All current transformers shall be provided with nameplates with its serial number, ratio, burden, type number and accuracy class

f) One - 240V, single phase, 3 pin shielded and fused socket of 13A rating, fuse protected for maintenance purposes.

g) One 240 V threaded type bulb holder with switch.

h) One No. of fuse puller with each Feeder Pillar.

i) All live parts shall be suitably shrouded to bar any direct access to live parts and shall be subject to approval. The shrouds shall have a minimum thickness of 3mm.

FP - 7.2 ( of 16)

j) All connectors have to be of approved type.

- One complete sample should be submitted for approval before mass production.

1.9 Type B - 1000 amps. feeder pillars

1.9.1 Rating

The pillar shall have a continuous rating of 1000 amps under the specified conditions. One bar of size not less than 800 sq.mm shall be provided for each phase busbar. One bar of size not less than 400 sq.mm shall be provided for neutral busbar. One bar of size not less than 300 sq.mm shall be provided for earth busbar. Any sizes of phase, neutral or earth bus bars, other than specified above, shall be subjected to the approval of the Authority. The thickness of all phase, neutral and earth busbars should not be less than 10 mm.It shall have short circuit capacity of 30 KA or more for 1 sec. as per IEC- 60439.

1.9.2 The Pillars shall be equipped with :

a) Incoming arrangement of 4 single core 630 sq.mm stranded copper cables, XLPE insulated. The arrangement should include knockouts in the gland plates (which can be easily knock out with one push/tap of the hammer) and glands for the cables with suitable link units of 1000A rating, together with suitable clamping devices for mounting of the cables.

b) 6 Nos. outgoing circuit arrangements suitable for 3 1/2 x 300 sq.mm stranded aluminium cables per circuit including suitable clamping devices, knockouts, glands and facility to connect cable armour by flexible copper wire to earth busbar, together with HRC fuses of 300A rating. The fuse shall be NH Type, size 2, class of operation gL as per IEC 269, DIN 43260, DIN 57636 & VDE 0636 and shall be tested as per relevant international standard. The requirements for fuse links shall be as per bill of quantity.


d) Three single-phase ampere meters 0-1000 Ampere range with matching current transformers to read the incoming current on each phase, with facility to read maximum current over a period of time with a reset arrangement. All current transformers shall be provided with nameplate with its serial number, ratio, burden, type number and accuracy class.

e) 6 Nos. single phase amps. meters 0-500 ampere range with matching current transformers to read the outgoing current on one phase from each outgoing cable, with facility to read maximum current over a period of time with a reset arrangement. Fixing of meters and C.T.s, Should be done with suitable arrangement approved by FEWA. The meters should be read clearly from out side through unbreakable glass windows ,which shall not fade / defuse with time. All current transformers shall be provided with nameplates with its serial number, ratio, burden, type number and accuracy class

f) One - 240V, single phase, 3 pin shielded and fused socket of 13A rating protected for maintenance purposes.

FP - 7.2 ( of 16)

g) One 240V threaded type bulb holder with switch.

h) One No. of fuse puller with each Feeder Pillar.

i) All live parts shall be suitably shrouded to bar any direct excess to live parts and shall be subject to approval. The shrouds shall have a minimum thickness of 3mm.

j) All connectors have to be of approved type.


1.10 Type C - 500 amps. Feeder Pillars

1.10.1 Rating

The feeder pillar shall have a continuous rating of 500 amps under the

specified conditions. One bar of size not less than 400 sq.mm shall be provided for each phase busbar. One bar of size not less than 300 sq.mm shall be provided for neutral busbar. One bar of size not less than 200 sq.mm shall be provided for earth busbar. Any sizes of phase, neutral or earth bus bars, other than specified above, shall be subjected to the approval of the Authority. The thickness of all phase, neutral and earth busbars should not be less than 10 mm. It shall have short circuit capacity of 30 KA or more for 1 sec as per IEC- 60439.

1.10.2 The Pillars shall be equipped with :

a) Incoming arrangement shall be provided for one 3 1/2 core 300 sq.mm stranded aluminium cable XLPE insulated. The arrangement should include knockout in the gland plate, which can be easily knocked out with one push/top of the hammer with suitable incoming isolating link units of 500A rating, clamping devices for mounting of the cables. Facility to connect cable armour by flexible copper wire to earth busbar shall also be provided.

b) 5 Nos. outgoing circuit arrangements suitable for 3 1/2 x 185 sq.mm stranded aluminium cables per circuit including suitable clamping device, knockouts, glands and facility to connect cable armour by flexible copper wire to earth busbar, together HRC fuses of 200A rating. The fuses shall be NH type, size 2, class of operation gL as per IEC 269, DIN 43260, DIN 57636 and VDE 0636 and shall be tested as per relevant standard. The requirements for fuse links shall be as per bill of quantity.


d) Three single phase ampere meters 0-500 ampere range with matching current transformers to read the incoming current on each phase, with facility to read maximum current over a period of time with a reset arrangement. All current transformers shall be provided with nameplate with its serial number, ratio, burden, type number and accuracy class.

FP - 7.2 ( of 16)

.

e) One - 240V, single phase, 3 pin shielded and fused socket of 13A rating protected for maintenance purposes.

f) One 240V threaded type bulb holder with switch.

g) One No. of fuse puller with each feeder piller.

h) All live parts shall be suitably shrouded to bar any direct access to live parts and shall be subject to approval. The shrouds shall have a minimum thickness of 3mm.

i) All connectors have to be of approved type.


1.9.4 Overall dimensions

It is intended to enclose some of the feeder pillars along with Ring Main Unit and transformer in a fibre glass enclosure made of panels of standardized dimensions, the height of which shall be not more than 2500 mm.

FP - 7.2 ( of 16)

SCHEDULE ‘A’

SUB-MANUFACTURERS The Tenderer shall state below the names of the sub-manufacturers to the main manufacturer and details of the equipment proposed to be manufactured or supplied by them:

Name & Address of the Sub-Manufacturer

Signature

Designation

Name of Tenderer

Date

Description of Equipment

:_________________________

:_________________________

;_________________________

:_________________________

FP - 7.2 ( of 16)

SCHEDULE ‘B’

PLACE OF MANUFACTURE, TESTING AND INSPECTION The Tenderer to complete the following schedule for all materials he proposes to supply Item No. Description Manufacturer

Signature

Designation

Name of Tenderer Date

Place of Place of testing manufacture and inspection

:_________________________

:_________________________

;_________________________

:_________________________

FP - 7.2 ( of 16)

SCHEDULE ‘C’

DEVIATION FROM TENDER SPECIFICATION The Tenderer to state in the following schedule the deviations from the tender specifications proposed in his offer. Deviations other than those specifically listed below will not be taken note of: Item No. Description Precise Details of the Deviations

Signature :_________________________

Designation :_________________________ Name of Tenderer ;_________________________

Date :_________________________

FP - 7.2 ( of 16)

SCHEDULE ‘D-1’

GUARANTEED PARTICULARS

Technical specifications for Primary Feeder Pillars. Particulars given below are guaranteed by tenderer for use in 50 Deg. C. ambient temperature and 100% humidity Sl. Type A Type B Type C No. Description Unit 2000 A 1000 A 500 A 1. Name of Manufacturer

2. Country of Origin 3. Applicable Standards

4A Main busbar for 3 phases :

a) Rating (at 500 C ambient + temp rise as per IEC) Amps

b) Dimensions (width and thickness) mm x mm c) Materials d) Barriers type e) Insulator materials f) Clearances from enclosures g) Short time current withstand capacity for 1 sec.

B Neutral busbar

a) Rating (at 500 C ambient + temp rise as per IEC) b) Dimensions (width and thickness) c) Materials d) Short time current withstand capacity for 1 sec.

5. Rating of incoming link

6. Outgoing circuits :

a) Number per phase b) Rating in ampere

7. Feeder pillar dimensions :

a) Depth b) Width c) Height

Signature of Tenderer : _______________________

FP - 7.2 ( of 16)

SCHEDULE ‘D-1’ (Contd…..)

Sl. Type A Type B Type C No. Description Unit 2000 A 1000 A 500 A 8. Measuring Instruments :

a) Voltmeter range b) Voltmeter selector switch No. of position c) Ammeter range d) C.T. ratio e) Accuracy class of C.T. f) Burden of C.T.

9. Fuses :

a) Rating b) Type c) Size of fuse d) Breaking capacity e) Applicable standards

10. Fuse carrier & Base :

a) Type b) Material c) Size d) Applicable standards

11. Cable connections : a) Incoming ( Ph = N )

1. Lugs material 2. Suitable for cable size 3. Ratings

b) Outgoing ( Ph + N )

1. Lugs material 2. Suitable for cable size 3. Ratings

c) Earthing connections

1. Type of connectors 2. No. of connectors 3. Material of connectors 4. Size of connectors


FP - 7.2 ( of 16)

SCHEDULE ‘D-1’ (Contd…..)

Sl. Type A Type B Type C No. Description Unit 2000 A 1000 A 500 A 12. Earth bar :

a) Materials b) Dimensions c) Dimensions of link between neutral and earth busbars

13. Provision of lamp holder and switch

14. Provision of socket switch 13A.

15. Special tools :

a) Provided b) Function

16. Voltage test :

a) Voltage applied b) Duration of test

17. Type test reports submitted

Signature : Designation :

Name of Tenderer :

Date : FP - 7.2 ( of 16)

SCHEDULE ‘D-2’ GUARANTEED PARTICULARS OF GRP ENCLOSURE

Technical specifications for Polyester Fibre Glass Reinforced Solid Enclosures. All particulars given below are corrected by tenderer to UAE weather conditions of 50 Deg. C ambient temperature, 100% humidity.

Sl. No. Description Unit Particulars 1. Name of manufacturer of GRP cabinet

2. Degree of Protection (as per IEC 60529)

3. a) Thickness of GRP material of the enclosure ( Min.) b) Thickness of GRP material at hinges and points of stress c) Fibre glass content of GRP gm/sq.m/mm thickness

4. a) Standard to which GRP material comply

b) Tensile strength 5. Mechanical Properties :

a) Impact strength b) Tensile strength

6. Electrical Properties :

a) Surface resistance b) Resistivity

7. Other Properties

a) Dimensional stability b) Softening temperature c) Cont. withstand temperature d) Density

8. Details of ageing test 9. Suppliers guarantee (in number of years) that the GRP

material will not change its colour of texture when installed outdoor in U.A.E. conditions.

10. Test reports/Certificates for following tests enclosed.

a) Fibre glass content measurements b) Impact strength c) Tensile strength d) Fire retardance test


FP - 7.2 ( of 16)

SCHEDULE ‘E-1’

DETAILS OF PAST EXPERIENCE OF MANUFACTURER OF FEEDER PILLAR

Name and address Qty. Year of supply

Remarks

Signature :_________________________

Designation :_________________________ Name of Tenderer :_________________________

Date :_________________________ FP - 7.2 ( of 16)

SCHEDULE ‘E-2’ DETAILS OF PAST EXPERIENCE OF MANUFACTURER OF GRP ENCLOSURES


Remarks

Signature :_________________________

Designation :_________________________

Name of Tenderer :_________________________ Date :_________________________

FP - 7.2 ( of 16)

SPECIFICATION NO. SP - 7.0 (Revised in March 2010)

SPECIFICATION FOR 400 AMPS GRP SERVICE PILLAR

1. Standard Specification:

The service pillar shall conform to the latest edition of IEC 60439 or any other equivalent international standard, which shall be subject to the approval of the Authority.

2. Site Condition:

The service pillar shall be installed outdoors in U.A.E. in salt laden dusty atmosphere where the maximum humidity of 100% and maximum ambient temperature at 50 deg. C can be experienced. The service pillars shall be suitable for continuous operation at the above site conditions.

3. Scope and Nature of Work:

The specification provides for design, manufacture, test at manufacturer's works in presence of FEWA representatives, suitable packing, transportation and offloading at site of works or FEWA stores in satisfactory condition and proper stacking as directed by FEWA.

4. Rating:

The service pillar shall be rated at 400 Amps, 50 cycles, 3 phase, 4 wire and 433 volt supply system.

5. Busbars:

The phase and neutral busbars shall be made of tinned copper of dimensions not less than 30x10mm and shall be able to carry the specified currents continuously under maximum ambient temperature of 50 deg. C and allowable busbar temperature rise as per IEC. The earth busbar shall also be of tinned copper with dimensions 30x5mm. Adequate solid removable links between earthing bus and neutral bus shall be provided. Red phase, Yellow phase, Blue phase, Neutral and Earth bars should be mounted horizontally with the same sequence of red at top and earth bar at bottom. All live parts shall be completely shrouded to bar direct access to live parts including bus bars and connections and shall be subject to approval. Thickness of shrouding plate should not be less than 3 mm. Busbars should be properly labelled by short strip of painting (Red, Yellow, Blue, Black for Neutral and Yellow Green for Earth) on either side. The busbar rupturing capacity should be more than 30KA for at least 1 sec. as per IEC-60439. The insulation between busbars and enclosure shall be approved type. The insulation should be tested for 3.5KV minimum for 1 minute.

The service pillar shall be provided with one incoming of 3-1/2 x 300 sq.mm. aluminium cable bay with bimetallic lugs and one outgoing of 3-1/2 x 185 sq.mm. aluminium cable bay with bimetallic lugs each with suitable glands, situated at either side of the center of the busbars. Suitable armour clamps shall also be provided.

240V, single phase, 3 pin-shielded sockets of 13A rating and 240V screwed lamp holder with switch are also to be provided.

SP - 7.0 (Page 1 of 12)

6. HRC Fuse Links and Fuse Bases:

The bus bars shall have 18 Nos. outlets (six numbers on each bus bar) with 18 Nos. of HRC fuses. The HRC fuses and fuse bases shall be NH type, size 00, class of operation of HRC fuses shall be gL as per IEC 269, DIN 43260, DIN 57636 and VDE 0636 and shall be tested as per relevant international standard. Contacts and connection of fuse bases shall be rated at 160 Amps with extended terminal suitable for fixing to the busbars and bimetallic lugs of palm length, minimum 36mm. All fuse contacts shall be silver plated. Each pillar shall be provided with one number of fuse puller of approved type. The terminals of fuse bases shall be suitably designed to accommodate upto 4 x 70 sq.mm size aluminium cables and shall allow short circuit current to pass without excessive heating. The requirement of fuse links shall be as per bill of quantities.

7. Outgoing service cable terminations:

Service cable termination shall be through lugs to secure connections of stranded aluminium cable size upto 70 sq.mm. Suitable cable glands shall also be provided along with minimum 3mm thick gland plate. For blocking the gland holes, suitable knock outs to be provided in the plates. These can be easily knocked out with one push/tap with hammer. The requirement of lugs shall be as per Bill of Quantity.

8. Enclosure:

The enclosure box shall be of glass-reinforced polyester (GRP) of moulded type using high quality right grade of raw materials to suit severe weather conditions. The fibre glass content of GRP shall not be less than 450 gm/sq.m/mm thickness. The enclosures shall be manufactured by hand lay up process in approved moulds or any other approved process so as to ensure smooth finish on mould side i.e., on external face and reasonable smooth finish on internal face. There shall be confluency in the product equality and finish on surfaces.

The wall thickness of enclosure should not be less than 4mm and 6mm at point of stress so that it can firmly withstand the shocks due to short circuit and any other causes. Ribs and stiffeners shall be provided wherever necessary.

The following features must be available with the service pillar enclosure:

i) Access doors shall be of close fitting with handles, which positively hold the doors when turned.

ii) The doors should be provided with suitable approved gasket to prevent entrance of moisture and humidity.

iii) Shall be provided with pad lock facility.

iv) Suitable ventilating arrangement should be provided for the enclosure.

v) The GRP laminates shall have following mechanical properties: - Tensile strength: 80 Mpa as per ISO/R527-66 - Impact strength: 40-50 KJ/m2 as per ISO-179-82 or

equivalent.

vi) Shall be non hygroscopic and shall not warp under humid conditions.

SP - 7.0 (Page 2 of 12)

vii) Shall be resistant to ultra violet radiation.

viii) The construction of pillars shall ensure a degree of protection conforming to IP 42.

ix) External finish should be plain, semi gloss light grey gelcoat finish to RAL 7032.

x) Roof or top of the enclosure shall have sufficient slope to drain rainwater and shall be moulded in one piece.

xi) It should be fire retardant, self-extingushing to DIN 4102 class B2.

xii) Enclosure should be provided with nameplate mentioning details such as type, current rating, voltage rating, serial no., year of manufacture, name of manufacturer etc.

xiii) Should be provided with lifting arrangement, earthing bolts at two- point and cable gland plate with opening at the bottom for fixing with screws and also foundation bolts as per International Standards. Foundation drawing shall be provided.

9. Danger Plate:

A danger plate in both Arabic and English languages of an approved design shall be fixed on the doors. The word "Property of FEWA-UAE" shall either be embossed on the enclosure or written clearly on a separate plate of approved design to be fixed on the enclosure. Paint quality shall be good and durable.

10. Earthing Arrangement:

Two earth terminals shall be provided at the lower end of the enclosure, which are connected internally with the earth bar. All non-live metallic parts shall be internally connected to the earth bar.

11. Mounting Facility:

The service pillar shall be of self-supporting to enable mounting on a preformed foundation.

Each pillar shall be supplied with a pre-cast concrete base in accordance with drawing No. FEWA/E/GEN/252/2003 with a mixing ratio of 1:1.5:3 using minimum 350 Kg of cement/m3 of concrete. The structural concrete shall have minimum cube crushing strength 250 kg/cm2 at 28 days. Sufficient number of steel reinforcements shall be used to provide excellent resistance against mechanical breakage to the approval of the Authority.

The quality and test for coarse aggregate, fine aggregate, water and cement shall comply with B.S. or equivalent standards. The source of coarse aggregate and fine aggregate shall be approved by FEWA Engineer.

Aggregate/cement ratio, fine/total aggregate ratio, slump, batching and mixing of concrete, and strength of concrete shall comply with B.S. or equivalent standard.

Cement type shall be Sulphate Resistant Cement or Moderate Sulphate Resistant Cement according to the soil nature.

Two coats of approved Bitumen paint shall be applied for below ground concrete areas

SP - 7.0 (Page 3 of 12)

The dimensions of the pre-cast base not specified on the drawing shall be made to suit the dimensions of service pillar. The contractor shall submit the drawing to the Authority for approval.

Two fully threaded mild steel bolts with nuts and washers properly anchored in the precast bases shall be provided to give sufficient support to the base as per the attached drawing No. FEWA/E/GEN/252/2003. The outer surface of the precast base shall be smooth, fair faced and free from any sharp edges.

Galvanization to M16 bolts shall be 80 microns minimum.

Proper curing with acceptable water for a period of minimum 7 days to be given after casting.

The Authority reserves the right to inspect the foundation at manufacturer’s workshop.

The requirement for concrete foundation shall be as per Bill of Quantity.

12. Special Tools:

Special tools, if required for operation and maintenance of service pillar, should be supplied with each service pillar.

13. Drawings:

All constructional, foundation and equipment drawings should be supplied along with the offer. All drawings are subject to approval of FEWA, prior to start of manufacture.

14. Testing:

a) Electrical Tests:

The service pillar shall be subjected to all type, special and routine tests in accordance with IEC recommendations. Certified copies of the type and special test reports not older than seven years shall be supplied along with the offer. Routine tests shall be repeated on 10% of the quantity in presence of FEWA representatives at the manufacturer's works. The supplier shall make provision in his offer to bear the costs that are incurred in carrying out these tests to the satisfaction of FEWA. However, cost towards travel, accommodation etc. of FEWA representatives shall not be included in the quoted price.

b) Tests on GRP Enclosure:

If certified copies of type and special test certificates on GRP enclosure confirming the specified requirements of our specification are not enclosed, FEWA reserves the right to ask all or any of the following tests to be carried out and test reports/certificates to be submitted for approval.

i) Fibre Glass Content Measurements. ii) Impact Strength iii) Tensile Strength iv) Fire Retardance Test

SP - 7.0 (Page 4 of 12)

SCHEDULE ‘A’

SUB-MANUFACTURERS

The Tenderer shall state below the names of the sub-manufacturers to the main manufacturer and details of the equipment proposed to be manufactured or supplied by them:

Name & Address of the Sub-Manufacturer

Signature

Designation

Name of Tenderer Date

Description of Equipment

:_________________________

:_________________________

;_________________________

:_________________________

SP - 7.0 (Page 5 of 12)

SCHEDULE ‘B’ PLACE OF MANUFACTURE, TESTING AND INSPECTION

The Tenderer to complete the following schedule for all materials he proposes to supply Item No.

Description Manufacturer

manufacture and inspection

Signature

Designation

Name of Tenderer

Date

Place of Place of testing

:_________________________

:_________________________

;_________________________

:_________________________

SP - 7.0 (Page 6 of 12)

SCHEDULE ‘C’ DEVIATION FROM TENDER SPECIFICATION

The Tenderer to state in the following schedule the deviations from the tender specifications proposed in his offer. Deviations other than those specifically listed below will not be taken note of: Item No.

Description

Signature

Designation

Name of Tenderer

Date

Precise Details of the Deviations

:_________________________

:_________________________

;_________________________

:_________________________

SP - 7.0 (Page 7 of 12)

SCHEDULE ‘D1’

GUARANTEED PARTICULARS OF GRP SERVICE PILLARS

Technical specifications for service feeder pillars. All particulars given below are corrected by tenderer to UAE weather conditions of 50 Deg.C. ambient temperature, 100% humidity.

Sl Description Unit Particulars

No.

1 Name of Manufacturer 2 Country of origin 3 Applicable Standard

4 Main busbar (3 Phase + neutral)

a) Rating Amps b) Dimensions mm x mm c) Materials d) Barriers e) Insulation f) Clearances from enclosure mm

5 Incoming bay ( ph + N )

a) Lugs material b) Suitable for cable size Sq.mm c) Rating Amps

6 Outgoing bay ( ph + N )

a) Lugs material b) Suitable for cable size Sq.mm c) Rating Amps

7 Service circuits :

a) Number per phase No. b) Rating in Amps Amps

8 Short circuit capacity of busbar for 1 sec. KA

9 Service pillar dimensions :

a) Depth mm b) Width mm c) Height mm

Signature of Tenderer : _____________________________

SP - 7.0 (Page 8 of 12)

SCHEDULE ‘D1’

GUARANTEED PARTICULARS OF GRP SERVICE PILLARS Sl Description Unit Particulars

No.

10 Fuse links : a) Make & country of origin b) Rating Amps c) Type d) Size as per standard e) Rupturing capacity KA f) Time/current characteristics enclosed Yes/No

11 Fuse bases :

a) Make & country of origin b) Rating Amps c) Type d) Size as per standard e) Short circuit capacity of contacts & terminals KA

12 Earth bar :

a) Material b) Dimensions mm x mm

13 Insulation level : a) Voltage applied KV b) Duration of test Minutes

14 a) Provision of 13A socket Yes/No

b) Provision of lamp holder with switch Yes/No 15 Special Tools :

a) Provided Yes/No. b) Function

16 Maximum Temperature rise as per IEC Deg. C


SP - 7.0 (Page 9 of 12)

SCHEDULE ‘D2’

GUARANTEED PARTICULARS OF GRP ENCLOSURE Technical specifications for Polyester Fibre Glass Reinforced Solid Enclosures All particulars given below are corrected by tenderer to UAE weather conditions of 50 deg.C ambient temperature, 100% humidity :

Sl. Description Unit Particulars

No.

1 Name of manufacturer of GRP cabinet 2 Degree of Protection (as per IEC 60529)

3 a) Thickness of GRP material of the enclosure (Min.) mm

b) Thickness of GRP material at hinges and points mm of stress

c) Fibre glass content of GRP gm/sq.m/mm thickness gm 4 a) Standard to which GRP material comply

b) Process of manufacture 5 Mechanical Properties :

a) Impact strength b) Tensile strength

6 Electrical Properties :

a) Surface resistance Ohms b) Resishivery Ohm cm

7 Other Properties

a) Dimensional stability Deg.C, b) Softening temperature Deg.C, c) Cont. withstand temperature Deg.C, d) Density g/Cu.cm

8 Details of ageing test

9 Supplier’s guarantee (in number of years) that the

GRP material will not change its colour of texture when installed outdoor in U.A.E. conditions.

10 Test reports/Certificates for following tests enclosed. Yes/No

a) Fibre Glass Content Measurements b) Impact Strength c) Tensile Strength d) Fire Retardance Test


SP - 7.0 (Page 10 of 12)

SCHEDULE ‘E-1’ DETAILS OF PAST EXPERIENCE OF MANUFACTURER OF SERVICE PILLAR


Remarks

Signature :_________________________

Designation :_________________________


SP - 7.0 (Page 11 of 12)

SCHEDULE ‘E-2’ DETAILS OF PAST EXPERIENCE OF MANUFACTURER OF GRP ENCLOSURES


Remarks

Signature :_________________________

Designation :_________________________


SP - 7.0 (Page 12 of 12)

SPECIFICATION NO. FB - 5.0 SPECIFICATION FOR LV POLE MOUNTED FUSE BOX (Revised in August, 2004)

1. STANDARD SPECIFICATIONS

The low voltage pole mounted fuse box shall conform to the IEC-439 or any other equivalent international standards which shall be subject to the approval of the Authority.

2. SITE CONDITIONS:

The fuse boxes shall be installed outdoors in U.A.E. in salt laden dusty atmosphere where the maximum humidity of 100 % and maximum ambient temperature of 50 deg.c. can be experienced. The fuse boxes shall be suitable for continuous operation at the above site conditions.

3. SCOPE AND NATURE OF WORK

The specification provides for design, manufacture, test at manufacturer's works in presence of FEWA representatives, suitable packing and delivery at FEWA's site of works or stores in satisfactory condition and proper stacking as directed by FEWA.

LV fuse box shall have one incoming and one or two outgoing circuits. The fuse box shall be mounted on LV pole in conjunction with 50 or 100 KVA distribution transformer and for use on 433 Volts, 50 Hz, 3 phase and 4 wire supply.

4 CONSTRUCTION REQUIREMENTS

4.1 G.R.P. ENCLOSURE

Glass reinforced polyester enclosures shall be generally as shown in the Dwg.No. FEWA/E/GEN/264/2004 with the following standard features:

i) Preference shall be given to enclosures where main body is moulded in single piece.

ii) FGRP enclosures shall be manufactured using fiberglass chopped strand mat impregnated with fire retardent self extinguishing polyester resins. Fire rating of FGRP laminate shall conform to DIN 4102 class B2 or equivalent Standard.

iii) Successful tenderer shall procure all raw materials for manufacture of enclosures from reputed manufacturers and in particular shall evidence purchase of fire retardent polyester resins from the manufacturer.

Premixing of any ingredient for improving fire resistance/self extinguishable properties of the resin and gel coat shall not be allowed in local fabricator factory. If it is required, it should be done at manufacturer plant only.

FB-5.0 (Page 1 of 13)

The fibreglass content in FGRP laminate shall not be less than 450 gms/m2/mm of thickness or 25 - 30% by weight. The FGRP laminate shall have following mechanical properties. Tensile strength : 80 Mpa as per ISO/R 527-66

0r equivalent.

Impact strength : 40-50 KJ/m2 ISO 179-82 Or equivalent.

iv) External side of the enclosures shall be protected against U.A.E. climatic

conditions by using UV stabilized Gelcoat or by other means subject to approval of FEWA.

v) Enclosures resistant shall be high impact and temperature resistant. vi) Thickness of FGRP shall not be less than 4mm. At points of stress it

shall not be less than 6 mm. Rib and stiffeners shall be provided whenever necessary.

vii) The colour of the enclosures shall be to RAL 7032.

viii) Degree of protection shall not be less than IP 42 as per IEC publication. ix) FGRP enclosures shall be complete with :

a) Hinged lockable (2 No. triangular or square key latch type locks normally used in electrical industry) front main door.

b) Sealing & Padlocking facility provided for main door. (Padlock &

seal not to be supplied).

c) The door shall be provided with rubber/neoprene gaskets on both sides. Gasket should be suitable for high ambient temperature and to prevent any ingress of humidity and moisture inside the cabinet.

d) The bottom of cabinet shall be provided with 2mm thick M.S. cable

glands plate.

e) Suitable ventilators shall be provided on the enclosure. IP rating of vents shall not be less than IP 42.

f) Enclosures shall be non-hygroscopic and shall not warp under

humid conditions.

g) Rooftop or canopy of the enclosure shall have sufficient slope to drain rainwater.

h) Enclosure shall be provided with 12mm earthing studs.

i) Enclosure shall be provided with nameplate mentioning details such as current rating, voltage and type, serial number, one way or two ways, manufacturer’s name, year of manufacture, which shall be subject to the approval of FEWA.

FB-5.0 (Page 2 of 13)

4.1.1 DANGER/PROPERTY PLATE;

Danger plate in both Arabic and English language, approved by FEWA, shall be fixed on the door. The words "Property of FEWA - UAE" should either be embossed on the enclosure or written clearly on a separate plate of approved design to be fixed on the fuse box.

4.1.2 INTERNAL LAYOUT

The general internal layout shall be as shown in the enclosed Dwg.No. FEWA/E/GEN/264/2004.

4.2. FUSE BOX ASSEMBLY

4.2.1 FUSES

HRC fuse links, fuse bases and supporting insulators shall be provided as per IEC 269, DIN 43260. The class of operation of fuses shall be gL and shall be tested as per relevant international standard. Fuse base shall be rated at 400A, NH2 type suitable for NH2 type fuse links. All fuse contacts shall be of silver or silver faced.

4.2.2 PHASE BUS FEATURES

The phase bus of fuse assembly should be of tinned copper of 30 x 5 sq.mm. cross section and of suitable length for conveniently connecting bimetallic lugs of incoming cables. The phase bus should be completely shrouded and the nuts, bolts and washers used, should be Nickel-Cadmium plated.

Phase barrier of bakelite sheet of minimum 3 mm thickness should be provided between each phase of fuses.

Neutral bus should also be of 30 x 5 sq.mm cross section, of tinned copper with holes and Nickel-Cadmium plated nuts, bolts and washers of suitable size to be provided.

4.2.3 All internal wiring shall be by 35 mm2 copper cables of 600/1000V grade.

4.2.4 Mounting plate, G.I. 2mm thick of suitable size shall be provided to mount fuses, copper bus etc. Plate material and galvanization shall be as per relevant IEC/BS specification.

4.3 MOUNTING ARRANGEMENT;

The fuse box will be mounted on the poles in conjunction with pole mounted distribution transformer. Suitable arrangement must be provided and shown clearly on the drawing to be supplied by manufacturer during tendering about the fixing arrangement of the fuse box on wooden pole as per FEWA drawing. Galvanization of flats & bolts, nuts, washers shall be as per relevant IEC/BS specifications.

4.4 EARTHING ARRANGEMENT;

Fuse box earthing should be provided at one point by one No. of M12 stud fixed at the side wall with suitable nut and washer. The earthing stud shall be pre-wired to the mounting plate, neutral bus and cable gland plate.

FB-5.0 (Page 3 of 13)

4.5 CABLE ENTRY:

The fuse box lower side should be provided with holes of following sizes :

4.5.1 FOR TWO-WAYS FUSE BOX:

One incomer and two outgoing cable holes to accommodate cable size upto 3 ½ x 95 mm.sq size with compression type gland for the incomer and wiping glands of size 25 sq. mm to 70 sq.mm. for outgoing feeders. Compression glands, wipping glands and bimetallic lugs for 3½ x 95 sq. mm. cable will be in the scope of supply of the manufacturer.

4.5.2 FOR ONE-WAY FUSE BOX:

One incomer and one outgoing cable holes to accommodate cable size upto 3½ x 95 sq. mm with compression type glands. and wiping gland of size 25sq. mm. to 70sq. mm. for outgoing feeder. Compression glands, wipping glands and bimetallic lugs for 3½ x 95sq. mm. cable will be in the scope of supply of the manufacturer.

5. REQUIREMENT FOR FUSE BOXES:

5.1 TWO-WAYS 200 AMPS FUSE BOX:

Two sets (3 Nos. of fuses in each set) of each circuit shall be provided with 3 Nos. 400 A NH2 fuse base suitable for fixing 100A, NH2 fuse link with fuse blowing red indicator visible from front side.

The fuse contacts should be silver plated. Each fuse will be separated by bakelite fuse barrier.

All live parts shall be suitably shrouded to bar any direct access to live parts and shall be subject to approval.

5.2 ONE-WAY 160A FUSE BOX.-

The fuse box should be provided with one incomer circuit from the bottom and one outgoing circuit at the bottom of vertically mounted fuse base of NH2 and the fuse of size 160A. Cables shall be connected to the fuse base directly.

The fuse blowing red indicator should be visible from the front of the box after opening the front door.

A suitable size tinned copper neutral and earth terminal connector to be mounted inside the box and shall be suitable for connection of incoming and outgoing circuits. Internal connections between neutral bus and gland plate to earthing stud and earthing stud shall be made with copper cables of size not less than 35 mm2.

FB-5.0 (Page 4 of 13)

6. TESTING

6.1 Certified copies of type test certificates for fuse bases/links shall be supplied alongwith the offer.

6.2 Every fuse box is to be routine tested according to the relevant standard. The

routine tests should include A.C. High Voltage withstand tests (Dielectric test) at 2.5 KV for one minute and insulation resistance tests.

6.3 Sample/routine tests shall be carried out in manufacturer's works and witnessed by FEWA two Engineers and the supplier should bear all the cost that are incurred in carrying out these tests to the satisfaction of FEWA. However, costs towards travel, accommodation etc. of FEWA's Engineers shall not be included in the quoted price.

6.4 Test on Enclosure :

Successful tenderer shall be required to submit test report from independent testing laboratory on the samples marked by FEWA as to:

a) Impact strength b) Tensile strength c) Fibre glass content d) Fire rating e) IP rating

Two samples of the box after fabrication in accordance with FEWA specification shall be tested by an independent authority and tests certificate shall be submitted directly to FEWA. After manufacturing of the enclosures, FEWA has a right to select random samples (One enclosures for every 100 Nos. or part thereof for quantity on order) for testing by the laboratory.

The manufacturers shall submit to FEWA its in-stage inspection and quality control procedures.

Routine tests on all finished enclosures shall be carried out at manufacturer's works and report submitted to FEWA.

7. PAST EXPERIENCE;

Manufacturers shall submit their past experience as to supply of enclosures with details as name of client, address, quantity supplied, value of contract, year of supply etc.

8. DRAWINGS:

Detailed drawing of the enclosure shall be submitted along with the offer. Detailed drawing shall show internal layout, connections of the LV fuse box, dimensions/clearances, mounting arrangements, etc.

FB-5.0 (Page 5 of 13)

SCHEDULE ‘A’ SUB-MANUFACTURERS

The Tenderer shall state below the names of the sub-manufacturers to the main manufacturer and details of the equipment proposed to be manufactured or supplied by them:

Name & Address of the Sub-Manufacturer Description of Equipment

Name of Tenderer :_____________________

Designation :_____________________

Signature :_____________________ Date :_____________________

FB-5.0 (Page 6 of 13)

SCHEDULE ‘B’ PLACE OF MANUFACTURE, TESTING AND INSPECTION

The Tenderer to complete the following schedule for all materials he proposes to supply

Item No.

Description

Place of Place of testing Manufacturer manufacture and inspection

Name of Tenderer :__________________

Designation :__________________

Signature :__________________

Date :___________________

FB-5.0 (Page 7 of 13)

SCHEDULE ‘C’

DEVIATION FROM TENDER SPECIFICATION

The Tenderer to state in the following schedule the deviations from the tender specifications proposed in his offer. Deviations other than those specifically listed below will not be taken note of:

Item No. Description Precise Details of the Deviations

Name of Tenderer :___________________

Designation :___________________

Signature :___________________ Date :___________________

FB-5.0 (Page 8 of 13)

SCHEDULE 'D-1'


Technical specifications for L.V. fuse box, particulars given are guaranteed by tenderer for use in 50 Deg. C. ambient temperature and 100% humidity. Sl Two way One way

No. Description Unit 200 A 160 A 1. Name of Manufacturer

2. Country of Origin

3. Applicable Standard

4.A Phase 1 Bus Feature :

a) Rating (at 50 Deg. C. ambient temp.) Amps

b) Dimensions (Width & Thickness) mm x mm c) Materials d) Barriers type e) Insulating material f) Clearances from enclosure

g) Short time current withstand capacity for 1 sec.

4.B Neutral Bus

a) Rating (at 50 Deg. C. ambient temp. rise as per IEC) Amps

b) Dimensions (Width & Thickness) mm x mm

c) Materials

d) Short time current withstand capacity for 1 sec. KA

5. Incoming circuit

Rating in ampere Amp

Signature of Tenderer :

Designation :

Name of Tenderer : Date :

FB-5.0 (Page 9 of 13)

SCHEDULE 'D-1' (Contd…)


Sl Two way One way

No. Description Unit 200 A 160 A

6. Outgoing circuit :

a) Number per phase No.

b) Rating in ampere Amp

7. Fuse Link

a) Rating Amps

b) Type -

c) Size of fuse -

d) Breaking capacity kA

e) Applicable standard

8. Fuse base

a) Type

b) Material

c) Size

d) Applicable standard

9. Earthing connections

a) Type of connection between neutral bus & stud b) Type of connection between non-live metallic components and earthing stud

c) Material of connectors

d) Size of earthing conductor

10. Voltage Test

a) Voltage applied KV

b) Duration of test min.

c) Insulation resistance test ohms


Designation :

Name of Tenderer :

Date :

FB-5.0 (Page 10 of 13)

SCHEDULE - ‘D2’


Technical specifications for Polyster Fibre Glass Reinforced solid enclosures Particulars given below are guaranteed by tenderer for use in 50 Deg. C. ambient temperature and 100% humidity. Sl

No. Description Unit Particulars 1. Name of Manufacturer

2. Country of Origin

3. Type No.

4. Length mm

5. Width mm

6. Depth mm

7. Specification to which GRP material comply

8. Thickness of sheet - minimum mm

9. Whether locking and sealing arrangements are provided Yes/No

10. Fixing arrangements :

a) Dia. Of fixing holes mm

b) Size of bolts mm x mm

11. Degree of Protection for the enclosure (IP class)

12. Mechanical Properties

a) Impact strength

b) Bending strength

c) Tensile strength d) Fibre glass content

13. Electrical Properties

a) Surface Resistance

b) Resistivity Signature of Tenderer :

Designation :

Name of Tenderer :

Date :

FB-5.0 (Page 11 of 13)

SCHEDULE - 'D2' (Contd…)


Technical specifications for Polyster Fibre Glass Reinforced solid enclosures

Particulars given below are guaranteed by tenderer for use in 50 Deg. C. ambient

temperature and 100% humidity:

Sl

No. Description Unit Particulars

14. Fire Resistance

a) Oxygen index

b) Flame test

15. Other Properties

a) Dimensional stability Deg. C

b) Softening temperature Deg. C

c) Cont. withstand temperature Deg. C

d) Tropicalisation & mould resistance

e) Density g/Cu.cm

16. Details of ageing test (if preformed)

17. Supplier's guarantee (in number of years) that GRP

material will not change its colour or texture when

installed outdoor in UAE conditions.


Designation :


FB-5.0 (Page 12 of 13)

SCHEDULE ‘E’

DETAILS OF PAST EXPERIENCE OF MANUFACTURER Year of

Name and address Qty. supply Remarks Signature of Tenderer :

Designation :


FB-5.0 (Page 13 of 13)

United Arab Emirates

Federal Electricity & Water Authority Directorate Of Planning

P.O.Box 1672, DUBAI

LV POLE MOUNTED FUSE BOX- 2 WAY (200A)

FEWA/E/GEN/264/2004

specification no. f.p - 7.2 (revised in march 2010...

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