REPAIR/REPLACEMENT AND MAINTENANCE OF VCBs, HT CABLE AND THEIR ALLIED WORKS AT AIR FORCE STATION PURNEA.

Amount

Excavation in trenches not exceeding 1.5 mtr wide and not exceeding 1.5 m in depth for taking out/laying of under ground cables/pipes etc n. exc 10 sqm on plan and n. exc 1.5m in depth and getting out and in soft/loose soil complete all as specified and directed.

Returning, filling in soft/loose soil including spreading, leveling, watering and well ramming in layers n.exc.25cm thick complete all as specified and directed.

Removing excavated materials (soils) n.exc.50 mtr and depositing where directed at a level n.exc.1.5 mtr above the starting point complete all as specified and directed.

M&L providing sand cushioning with a layer of clean, dry, fine sand for protection of electric cable laid in trenches/ducts, punned down to desired thickness complete all as specified and directed. (Note: For payment purposes only punned down thickness of sand shall be measured )

Supply & laying reinforced precast concrete cable cover, class EHV, type 1 with peak, size 450mm x 230mm x 50 mm all as specified & directed.

Taking out old unserviceable HT cable , any size & type from the trenches of pipe including taking out brick cable protection if required and deposited as directed (Note: Excavation and earth work will be measured & paid separately).

Relaying in trenches old serviceable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, heavy duty electric cable with aluminium conductor, 11000 volts grade (earthed) 150 sq. mm 3 core after thoroughly checking/testing and repair/replacement of jointing kit complete all as specified and as directed by Engineer-in-Charge. (Note : Cable obtained from taking out under serial item No 6.00 will be used. Cable joint kit/material will be measured & paid separately)

Supply and laying in replacement XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, heavy duty electric cable with aluminium conductor, 11000 volts grade (earthed), 150 sq. mm, 3 core in trenches/ on walls/ through duct complete all as specified and directed.

Take down old unserviceable cable jointing kit 11 KV grade, any type & any size complete all as specified and as directed by Engineer -in - Charge.

M&L in replacement cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination, heat shrink type joint complete with jointing material and accessories, suitable for 3 core XLPE, armoured, aluminium conductor cable of size 120 sqmm to 185 sqmm complete all as specified and directed.

M&L cable jointing kit for 11 KV (Earthed) grade cable for straight through joint, heat shrink type complete with jointing material and accessories, suitable for 3 core XLPE, armoured, aluminium conductor cable of size 150 sqmm complete all as specified and directed.

Taking down/taking out old unserviceable GI pipe any size complete all as specified and as directed by Engineer -in - Charge.

Supply and laying GI tubing 100 mm bore, light grade for protection of underground electric cable complete all as specified and as directed by Engineer -in - Charge.

M&L dehydration and filtration of transformer oil at site of installation for 11kV, 433 volts step down transformer of any capacity and any make, mounted indoor/outdoor and obtaining di-electric strength minimum 50 kV (r.m.s) with in one minute with 2.5 mm gap with portable filter-cum-dehydration machine complete all as specified and as directed by Engineer -in - Charge.(Note:- Testing of di-electric strength of dehydrated transformer oil of each transformer will be carried out in the presence of concerned Engineer -in - Charge.)

M&L providing new transformer oil in replacement of old unserviceable transformer oil of di-electric strength not less than 50 kV after draining out old oil complete all as specified and as directed by Engineer -in - Charge.

M&L in replacement of old unserviceable lightning arrestor, expulsion type with all fittings, transmission class, discharge capacity 65 kilo-amp including taking down old one complete all as specified and as directed by Engineer -in - Charge.

Dismantling VCB (Vacuum Circuit Breaker) by disconnecting its HT cable connection from both sides and 11 KV GOD and segregating/ checking all unserviceable parts, motor etc, reassembling all serviceable parts and also replacing unserviceable parts with the new parts, rewiring of internal circuit with new cable as per existing size, testing, calibration of relays, CT connection, PT alignment, Cleaning, polishing of VCB including final testing after fixing complete all as directed by Engineer -in - Charge.

M&L in replacement the following components/parts of VCB complete all as specified and as directed by Engineer-in-Charge :-

VCB drive and mechanism set

Vacuum interrupter set

Upper Arm

Lower Upper Arm

Closing & Tripping Coil

Auxiliary switch

Supporting Insulator

VCB body

Protection relay

Auxiliary relay

Current Transformer as per existing sample (Make: NPP/PLASTOFAB/ABB)

Potential Transformer all as specified and directed (Make: NPP/PLASTOFAB/ABB)

Bus bar all as specified and directed

Supply and installation of power pack unit of Input 110VAC 50 C/S,3 phase, Out put 110,Cap-300, make Crompton safety devices complete suitable for existing breakers including taking down old power pack unit all as directed all as specified and directed

Body Panel all as specified and directed

Supply and fixing resin cast current transformer of Ratio : 50/30/5-5A, Core-1 : 15VA,CI : 1.0, Core-II 15VA, CI : 5P10, STC : 26.3 KA/1 Sec (Make: NPP/PLASTOFAB/ABB)

Supply and fixing resin cast dual core current transformer of Ratio : 100/75/5-5A, Core-I : 15VA, Burden CI : 1.0, Core-II 15VA, Burden CI : 5P10, STC : 26.3 KA/1 Sec, (Make: NPP/PLASTOFAB/ABB)

Supply and fixing PT fuses for 11KV PT (Make - Anand or equivalent in ABB/Crompton Greaves/ABB)

Supply and fixing numerial IDMT 3-0/C+1-E/F protection relay with high set, Model No : ADR-141C (Make: ASHIDA/Schneider/Crompton Greaves or equivalent).

Supply and fixing indicator lamp (LED) (Make- EMCO/STS).

Supply and fixing CRC Chemical all as specified and as directed.

Supply and fixing Monoplast tape, size 3 mm x 35 mm x 1 meter roll of approved make all as specified and as directed.(Make: M-Seal/3M/Mega Seal)

Supply and fixing space heater, 230 volts, 100 watt all as specified and as directed. (Make: Reco/GIRISH)

Supply and fixing TNC Switch, 25 Amp, operational voltage 660 volts, Utilization Category AC-23/AC-21, as Per IEC 60947-5-1:2003, I.S.13947 Part I & V / Sec. 1:2004 all as specified and as directed (Make: Kayee/Rishabh/ABB)

M&L carrying out repairs to transformer of capacity 63 KV to 315 KV after disconnecting HT/LT connections, opening the top cover, draining out transformer oil and preserving in container, replacement of all gaskets, nuts, bolts etc for prevention of leakage, replacement of broken HT/LT bushes complete all as per existing specifications & size, refixing , refilling transformer oil, connecting to the electrical system and testing on load complete all as specified and as directed by Engineer-in-Charge.

M&L in replacement of porcelain vitreous H.T. bushing suitable for distribution transformer of capacity upto 315 KVA complete with copper spindle, checknuts, oil seal, bolts, nuts & washers etc complete all as specified and as directed by Engineer-in-Charge.

M&L in replacement of porcelain vitreous L.T. bushing suitable for distribution transformer of capacity upto 315 KVA complete with copper spindle, checknuts, oil seal, bolts, nuts & washers etc complete all as specified and as directed by Engineer-in-Charge.

M&L in replacement breather assembly of suitable size filled with Silica gel complete set all as specified and as directed by Engineer-in-Charge.

Material & labour providing PCC 1:3:6, type C-2(using 40 mm graded stone aggregate)as in foundation of poles/struts/stays complete all as specified and as directed by Engineer-in-Charge

M&L providing one primer coat, one under coat and one finishing coat of aluminium paint to LT/HT steel tubular poles, including angle iron cross-arms of channel/angle sections, clamps etc, painting upto 2.0 m height above G.L. as border and re-writing of pole number with synthetic enamel paint complete including necessary preparation of old painted surfaces complete all as specified and directed by Engineer-in-Charge.

S&F in replacement water proof LED glow sign board of dimension 8 ft x 3 ft size and having the following specifications for outdoor installation alongwith all connecting items required for installation of the sign board complete all as specified and directed by Engineer-in-Charge :- (a) High quality star flex printing on Eco-solvent printing (Matter of printing as given by Engineer-in-Charge). (b) LED tubes of Havells/Philips/Syska/Crompton Greaves (Water proof) -06 Nos (c) PVC insulated electric cables of suitable size for connection. (d) Signage box with square M.S. pipe frame of size 25mm x 25mm/32mm x 32 mm (as directed), duly painted with rust proof Asian Paint/Berger Paint

Supply, install, testing and commissioning in replacement Gang operated air brake switch (GOD), outdoor, tilting type, current rating 400 Amps,11KV, triple pole, complete with square shaft, operating pipe of suitable length for operating mechanism worked from ground level , handle, guide clamp etc complete all as specified and directed by Engineer-in-Charge. (Make : Pactil (Madras)/Southern Switchgear/ Universal/ BHEL/ ELPRO/Rastriya)

S&F Drop out fuse, two post insulator per pole complete with FRP fuse barrel, Channel type complete set for 3 Phase HT 11 kV with fixing arrangement complete all as specified and directed by Engineer-in-Charge. (Make : Pactil (Madras)/Southern Switchgear/ Universal/ BHEL/ ELPRO/Rastriya)

S&F Drop out fuse, two post insulator per pole complete with FRP fuse barrel, Bracket type complete set for 3 Phase HT 11 kV with fixing arrangement complete all as specified and directed by Engineer-in-Charge. (Make : Pactil (Madras)/Southern Switchgear/ Universal/ BHEL/ ELPRO/Rastriya)

M&L for 10 cm dia 8 mm thick CI cable route indicator HT/LT in round shape, fixed on angle iron post of size 25x25x4mm, 45 cm long complete, embedded in PCC 1:3:6, type C-1 block of size 250x250x250mm , duly marked /engraved HT cable 11 KV / LT cable (HT cable brown colour and LT cable blue colour ), including all necessary excavation , returning filling and removal of surplus soil to a distance n.exc. 50m complete all as specified and directed.

M/S Ali Trading Co

FRIENDS CONSTRUCTION

M/S MBS TRADING CO