SPECIAL REPAIR FOR REPLACEMENT OF OLD 11 KV OCBS WITH VCBS IN DIFFERENT ELECTRIC SUPPLY INSTLAN AT IMA DEHRADUN

Amount

Disconnecting the HT cables, earthing leads/strips of 11 KV OCBs and taking out the complete OCBs from the site of any type and capacity, lifting transporting the same to store yard to keep OCBs in safe custody complete all as specified and directed.

Supply, installation, testing and commissioning of 11 KV, 630 Amps, 21 KA for 3 sec HT vacuum circuit breaker panel for incomer confirming to the IEC 62271-200, IAC-AFLR-25 KA for 1 sec, PM LSC-2B, front accessed comprising of the following equipment’s :-

630 Amps continuous rating copper bus bar droppers and bus bars shall be Raychem insulated.

Cassette mounted vacuum circuit breaker model VD4 of ABB or equivalent in Siemens/Schneider with end sheet, castle lock and rear extension.

Motorized spring charging mechanism.

Inter panel barrier to prevent arc propagation from one panel/compartment to other.

Earthing switch rated for full making capacity with provision for safe and reliable position indicator.

Cast resin current transformer, 11 KV, 100/50/5±5 Amps having protection core class IP10, burden of 15 VA and breaking cap of 18.4 KA for 1.0 second - 03 Nos.

Cast resin potential transformer, 11 KV/√3/110V/√3, 100 VA/CL 1.0 - 03 Nos with desired capacity PT fuses.

Multifunction meter with Rs 485 port.

SCADA compatible IEC 61850 numerical O/C & E/F relay type REF 615 of ABB/75J6 x series of siemens/P143 series of Areva having following additional features :-

Trip ckt supervision (ii) Master trip (ii) Auxiliary relay (iv) Arc flash supervision of circuit breaker, cable and bus bar compartment.

Anti pumping relay panel shall have following additional features:-

Continuous rated closing/tripping coils (ii) Integral spring charging handle (iii) Fully internal arc tested (25 kA for 1 sec) as per latest IEC 62271-200 Norms.

In built power pack 24/36 volt DC as required for protection relays and other equipment’s/system.

Breaker shall be provided with following features:-

Auxiliary switch with 6 NO + 6 NC contacts mounted on the draw out portion of the switchgear. (ii) Position/ cell switch with 3 NO + 3 NC contacts one each for TEST and SERVICE position. (iii) Auxiliary switch with 4 NO + 4 NC contacts mounted on the stationary portion of the operated mechanically by a sliding lever from the breaker in service position.

Supply, installation, testing and commissioning of 11 KV, 400 Amps, 21 KA for 3 sec HT vacuum circuit breaker panel for outgoing confirming to the IEC 62271-200, IAC-AFLR-25 KA for 1 sec, PM LSC-2B, front accessed comprising of the following equipment’s :-

630 Amps continuous rating copper bus bar. droopers and bus bars shall be Raychem insulated.

Cassette mounted vacuum circuit breaker model VD4 of ABB or equivalent in Siemens/Schneider with end sheet, castle lock and rear extension.

Motorized spring charging mechanism.

Inter panel barrier to prevent arc propagation from one panel/compartment to other.

Earthing switch rated for full making capacity with provision for safe and reliable position indicator.

Cast resin current transformer, 11 KV, 50/25/5±5 Amps having protection core class IP10, burden of 15 VA and breaking cap of 18.4 KA for 1.0 second - 03 Nos.

Multifunction meter with Model PM 200 of Schneider or equivalent in L&T.

SCADA compatible IEC 61850 numerical O/C & E/F relay type REF 615 of ABB/75J6 x series of siemens/P143 series of Areva having following additional features :-

Trip ckt supervision (ii) Master trip (ii) Auxiliary relay (iv) Arc flash supervision of circuit breaker, cable and bus bar compartment.

Anti pumping relay panel shall have following additional features:-

(i) Continuous rated closing/tripping coils. (ii) Integral spring charging handle. (iii) Fully internal arc tested (25 kA for 1 sec) as per latest IEC 62271-200 Norms. (iv) Racking in/out, Manual closing/tripping of the CB with compartment door closed.

In built power pack 24/36 volt DC as required for protection relays and other equipment’s/system.

Breaker shall be provided with following features:-

(i) Auxiliary switch with 6 NO + 6 NC contacts mounted on the draw out portion of the switchgear. (ii) Position/ cell switch with 3 NO + 3 NC contacts one each for TEST and SERVICE position. (iii) Auxiliary switch with 4 NO + 4 NC contacts mounted on the stationary portion of the operated mechanically by a sliding lever from the breaker in service position.

The VCBs should be matched with the existing VCB/OCB including extension of bus bar and weather proof bus duct, nuts, bolts and painting with colour etc as required at site complete all as specified and directed.

Supply, installation, testing and commissioning of 11 KV, 630 Amps, 21 KA for 3 sec HT vacuum circuit breaker panel for bus coupler confirming to the IEC 62271-200, IAC-AFLR-25 KA for 1 sec, PM LSC-2B, front accessed comprising of the following equipment’s :-

630 Amps continuous rating copper bus bar. droopers and bus bars shall be Raychem insulated.

Cassette mounted vacuum circuit breaker model VD4 of ABB or equivalent in Siemens /Schneider with end sheet, castle lock and rear extension.

Motorized spring charging mechanism.

Inter panel barrier to prevent arc propagation from one panel/compartment to other.

Earthing switch rated for full making capacity with provision for safe and reliable position indicator.

Anti pumping relay panel shall have following additional features:-

Continuous rated closing/tripping coils. (ii) Integral spring charging handle. (iii) Fully internal arc tested (25 kA for 1 sec) as per latest IEC 62271-200 Norms. (iv) Racking in/out, Manual closing/tripping of the CB with compartment door closed.

Breaker shall be provided with following features:-

(i) Auxiliary switch with 6 NO + 6 NC contacts mounted on the draw out portion of the switchgear. (ii) Position/ cell switch with 3 NO + 3 NC contacts one each for TEST and SERVICE position. (iii) Auxiliary switch with 4 NO + 4 NC contacts mounted on the stationary portion of the operated mechanically by a sliding lever from the breaker in service position.

Note for item No. 2, 3 and 4 :-

Electrical and mechanical interlocking between all incoming breaker and bus coupler to avoid double supply in outgoing breakers.

Contractor shall provide a Laptop loaded with supports software (complete version) for local offline programming measurements extracting and viewing of events, disturbance etc.

Contractor shall submit type test reports for standards mentioned above to Garrison Engineer before placing orders to original manufacturer's of panels.

Minor items/parts required for making connections in respect of incoming outgoing and earthing etc are deemed to be included in the quoted rates by the contractor.

The VCBs should be tested at site after installation with primary injection system according to the load of feeders and submit the test report of all VCBs before pre commissioning cost of the same included in the quoted rate.

Excavation in trenches n. exc. 1.5 mtr wide and n. exc. 1.5 mtr in depth in soft/lose soil for laying cable/taking out under ground cable GI pipes and getting out in soft/loose soil complete all as specified and directed.

Returning, filling in trenches including spreading, leveling, watering and well ramming in layers n. exc. 25 cm thick in soft/lose soil after cable/pipes are laid and tested complete all as specified and directed.

Removing the excavated soil to a distance n. exc. 50 mtr and depositing where directed at a level not exc. 1.5 mtr above the starting point complete all as specified and directed.

Supply & laying sand coarse dry as in cushioning of underground electric cable in trenches, laid to a uniform thickness of 23cm (15cm under the cable & 8cm over the cable ) and gently punned down to 18cm thickness all complete all as specified and directed by the Engineer in Charge. Note :- Only punned down sand thickness 18CM shall be measured and paid

Material and labour for un-reinforced precast concrete cable cover class HV, type I, flat size 300 mm X 180 mm X 40 mm as protection to underground cable laid dry and flat adjoining each other complete all as directed.

Material and labour for replacement of galvanised steel tubes light grade 100 mm bore with fittings laid for protection of cable under road crossing fixed to walls or pole complete all as specified and as directed. (Note: Clamps for fixing pipe, nuts, bolts washers shall be measured separately )

Supply, laying, jointing and testing cable XLPE insulated screened PVC bedded galvanized steel strip or wire armored, electric power cables (Heavy duty) 11000 volts grade with stranded aluminum conductor of cross sectional area 3 core 150 sq mm including taking out/down old existing unserviceable cable complete all as specified and directed.

Material and labour for cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 120 to 185 sqmm complete all as specified and directed.

Material and labour for PCC 1:3:6 type C-1 using 20 mm graded crushed stone aggregate as in VCB foundation complete all as specified and directed.

Material and labour for Rubber mat of 1 meter x 2 meter x 19 mm complete all as specified and directed.

Material and labour for earthing with steel earth plate electrode of size 60x60cmx6mm thick buried directly in ground to a depth not less than 2.25 mtr deep below normal ground level with top edge of the earth plate not less than 1.5 mtr deep below normal ground level connected to galvanized iron strip of size 32 X 6mm as earthing lead by means of nuts, bolts and washers of steel after welding of GI strip to earth electrode to the full length of earth plate,40mm dia GI tubing light grade protection pipe upto test point, 20mm dia GI watering pipe with funnel and wire mesh, PCC pit 1:3:6 with pit cover of size 30X30cm made of RCC 1:3:6 with suitable handle, angle iron frame made of angle iron of size 40x40x4mm, adequate qty of charcoal dust and salt layers all around the earth plate, removal of surplus soil and returning filling in all as required at site including test point made out of steel plate of size 75 mm x 75 mm x 6 mm fixed to wall all as specified in plate No 3 of SSR Part-I and directed.

Material and labour for earth continuity conductor of size 25 X 4 mm GI. strip fixed to wall and bottom or recess or chases or buried in ground or drawn in conduit/pipe or fixed in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing complete all as specified and directed.

BHARAT ELECTRICAL TRADERS

KANISHKA ENTERPRISES

Rajindera Enterprises

M/S JIWAN KUMAR MITTAL

Ravi Electrical

Ridhi engineers and builders