ATTENDING GAS LEAKAGE OF 145 KV SF-6 CIRCUIT BREAKER, REPLACEMENT OF 145 KV SF-6 CIRCUIT BREAKER

Dismantling of pole of SIEMENS Make 145KV SF-6 Circuit Breaker of following feeders at 132KV Sub Station Cholapur for attending gas leakage of132/ 33 KV , 40 MVA T/F- I (Type- 3AP1FG , Mfy- 2019/24392)– 01 Pole.

Inspection and rectification of gas leakage of 145 KV SF-6 Circuit Breaker. Job includes opening of assembly (R-phase) from upper and lower terminal flanges, cleaning of all groves of flanges and porcelain with petrol, scrubber pad and acrylic solution. Replacement of all O-ring of the pole and gas pipe fittings by applying annabond adhesive. Reassembly of pole then evacuation of pole upto 760 mm Hg after testing of vacuum for 12 hours and after satisfactory result, refilling of SF-6 gas upto required level. Checking of proper operation of circuit breaker from local and remote, Measurement of Breaker Contact Resistance, O-C,O-C-O Timing and Dew Point of SF6 gas with suitable Test Kit. Cost includes all materials, T&P and other associated work excluding SF-6 gas.(All Required Test Kit & gas receive evacuation plant will be arrange by Contractor at own cost.)

Dismantling of very old and used SF6 145 KV circuit breaker CGL make from 132 kv Sarnath -Cantt bay by opening of nut and bolts and electrical connection from terminal box ,cutting of earthling strips and shifting at suitable place in store complete with all respect with all other accessories and marshaling box with the help of hydra /crane (men & T and P required for completion of Job are in the scope of contrator). at 132KV S/S Sarnath Varanasi.

Providing and installation of modified 145 KV Circuit breaker foundation fixure on existing foundation for installation of 145 KV New ABB make Circuit breaker. Drilling cutting and welding are in the scope of contractor if required (men material & T and P required for completion of Job are in the scope of contrator).

Erection of 145 KV New ABB make circuit breaker on newly modified foundation as per mannual and technical specification including shifting of materials to erection site from the stores and all others associated works required for its proper erection with help of Hydra /crane (men & T and P required for completion of Job are in the scope of contrator).

Termination of already old and used laid control cable and drawing after making holes. In gland plates where required and fixing of cable glands and ferrules and nos . for each core cables and its termination in breaker.

Earthing of 145 KV CB from the earth mat to earthing point (at 02 points) of breaker by cutting bending and welding of 75x10 mm MS flat including the cost of MS flat and no welding joint are allowed over the ground level.

Complete overhauling of 33KV Vacuum Circuit Breakers installed at 132KV S/S Sarnath. Job Includes alignment of mechanism assembly by opening and adjusting its operating rod, holding latch and damping spring etc. Replacement of damaged washers, lock pins, small springs etc as per requirement during the work. Assembling the mechanism followed by oiling, greasing and tightening of all nuts & bolts of the mechanism box, checking & tightening of all AC/DC connections/terminals, proper checking the spring charging motor along with replacement of its carbon, removing the deposited dust/carbon on terminals by good quality CRC spray, checking the proper tripping & closing of VCB from local and remote including other associated works also if required for satisfactory completion of job. All labour, T&P and consumable items will be provided by contractor at his own cost.