Replacement of Oil Circuit Breakers by Air Circuit Breakers at Substation No II in NCL

Amount

Disconnection, Dismantling existing 400A/600A/800A Oil Circuit Breaker (OCB) from the existing panel and returning the removed material to NCL store located at about 800mtrs.

Fabricating, painting,supplying, fixing, testing & commissioning at NCL site, floor mounted, free standing pedestal type cubical panel made out of 1.6/2.mm thick CRCA sheet having overall dimensions as mentioned in he respective item. Complete compartmentalized (including internal partition made out of 1.66mm CRCA sheet enclosure, vermin proof. (The outer & inner CRCA sheets should be of 1.66mm thick doors should be of 2mm thick CRCA sheet). Rate is inclusive of base mounting frame. This Panel should be fixed on an anlge iron fram/C channel frame made out of 40mmx 40mmx 5mm MS angle/75mmx30mm C channel with height 920mm with provision of fixing with Anchor fastners. The Panel should be powder coated with siemens Grey/Ivory colour. The panel should be provided with following Electrical Accessories.Rate should be inclusive of all thehardware material req. for retrofitting of ACB on existing L.T.panel.All the frame work should be painted with two coats of Black enamel paint. The detailed specifications are as under:- (Drawings are attached with Volume II at page 39 to 41)

SITC of Cubical panel with overall dimensions :-Height 800 mm x Width 2250 mm x Depth 600 mm. with following Electrical accessories, 1. Supplying , fixing , commissioning & testing Air Circuit breaker with Microprocessor protection and contro Unit MTX1.5, three pole L&T make 630A ACB, U power OMEGA cat No.UW106NXD01900, UW1 630N 3P MD 1.5G BotV, ,Cable connection shrouders of suitable length should also be provided -------4 Sets of 630A Omega U power Air Circuit Breakers L&T Manual Draw Out type. (Detailed specifications are given at page 37-38 of Technical Bid Volume II)

SITC of Cubical panel with overall dimensions :-Height 800 mm x Width 1300 mm x Depth 600 mm. with following Electrical accessories, 1. Supplying , fixing , commissioning & testing Air Circuit breaker with Microprocessor protection and contro Unit MTX1.5, three pole L&T make 630A ACB, U power OMEGA cat No.UW106NXD01900, UW1 630N 3P MD 1.5G BotV, ,Cable connection shrouders of suitable length should also be provided -------2 Sets of 630A Omega U power Air Circuit Breakers L&T Manual Draw Out type. (Detailed specifications are given at page 37-38 of Technical Bid Volume II)

SITC of Bus coupler in Cubical panel with overall dimensions :-Height 800 mm x Width 800 mm x Depth 600 mm. with following Electrical accessories, 1. Supplying , fixing , commissioning & testing Air Circuit breaker without release based four pole L&T make 1600A ACB, U power OMEGA cat No.UW116NXD01000,Cable connection shrouders of suitable length should also be provided -------1 Set of 1600A Omega U power Air Circuit Breakers L&T Manual Draw Out type as a Bus Coupler. (Detailed specifications are given at page 37-38 of Technical Bid Volume II)

Supplying , Installation, Testing & commissioning of Electrolyte Copper Patti Busbar of size 60mm x10mm in Panel 600 Volts grade with required capacity with 99% Copper purity with fixing arrangement to both ends with high grade polyolefin insulation sleevescomplet as per specifications. Copper busbar is to be fixed to the input & out put connections of 10nos of Air circuit breakers. Therfore cost of 10x 6 nos of Brass nut bolts of suitable size may be considered while quoting.

Painting of Exiting Cubical Panel with single coat of Red Oxid & two coats of approved quality Enamel paint by scrapping existing paint & painting the same complete.

Supplying & laying in excavated cable trench PVC armoured cable, 3.5 core x 400 sqmm, Polycab/ Gloster/ Finolex-Make, Aluminium conductor 1.1KV grade at NCL site. (Before supplying the cable actual measurements at site should be taken in consultation with Engineer Incharge.)(For general shortfall of cables in main LT Panel)

Termination of 3.5 core,400 Sq.mm.Aluminium conductor armoured cable with suitable size of Aluminium crimping type lugs & flange/Siemens type brass cable gland Braco make.

Providing & Erecting Epoxy type heat Shrinkable Joint for LT XLPE armoured cabe; 3.5core x 400sqmm Aluminium conductor.

Labour charges for Disconnection & reconnection of existing load cables with suitable jointing/ gland/lug to the new ACB panel supplied vide Item No.2,3(Contractor should visit the site before quoting)

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