Replacement of 220KV SF-6 Circuit Breaker at 220KV Sub-Station Basti under Electricity Transmission Division-I Basti

Complete dismantling of M/s CGL/ABB make 245 KV Air drive Pneumatic Circuit Breaker with mounted frame, structure, jumpers and all 03 linkage poles, SF-6 gas pipeline for all poles, along with air compressors installed at 220 KV S/S Basti. Work includes hydraulic crane arrangement for dismantling and shifting up to store, including cost of labour, T&P and all materials. This work also includes disconnection of AC/DC supply and control cables from existing CB with proper tracing from C&R panel of bay at 220 KV S/S Basti.

Fabrication/retrofitting of base structure for each pole of M/s GE/ABB/or any other make 245 kV Spring Charged SF-6 Circuit Breaker on existing foundation using MS plate of 20 mm thickness of size 250x150 sqmm. MS plate shall be retrofitted as per current foundation drawing, including matching of base holes using lathe machine as required. (All cost of MS plate, material, T&P and labour shall be borne by the contractor.)

Proper, safe and complete erection of M/s GE/ABB/or any other make 245 kV Spring Charged Circuit Breaker on fabricated/retrofitted structure along with all 03 poles and complete CB mechanism using hydraulic crane at 220 kV Tanda Line Bay and 220kV ICT I BAY at 220 kV S/S Gidahi, Basti. Work includes shifting of CB from S/S store, fixing on base as per drawing/manual, fitting of all 02 linkage poles, SF-6 gas pipeline installation for all poles, and completion of entire assembly satisfactorily.

Commissioning of M/s GE/ABB/or any other make 245 kV SF- 6 Circuit Breaker by deputing a service engineer as per requirement. Work includes proper fixing of SF-6 linkage for each pole, filling of SF-6 gas in CB pole, checking of opening/closing timing of CB and completion of all associated works satisfactorily. (All tools and testing devices to be provided by contractor.)

Proper and safe cable termination on M/s GE/ABB/or any other make 220 kV Spring Charged Circuit Breaker of 220 kV Tanda Line Bay and 220kV ICT I BAY, work includes proper ferruling using required T&P for completion as per drawing. Job includes supply and fixing of ferrules of appropriate size/number for each core, termination using crimping-type lugs, and carrying out all associated work satisfactorily. Contractor shall arrange all ferrules, labour, lugs, cable glands and T&P at his own cost.

Double-side earthing of circuit breaker mechanism and each pole assembly using 75x10 sqmm MS flat, including welding and connection with MS round bar after digging the ground. Work includes two-coat painting with red oxide primer followed by two coats of green Asian Paint. (75x10 sqmm MS flat will be provided by the Contractor.)