Work

Amount

Major overhauling of ABB make 220KV Pneumatic Gas Circuit Breakers (GCBs). The work includes overhauling of complete mechanism assembly by opening of control valve assembly, holding latch antipumping pin, opening and cleaning of Pneumatic cylinder, shock absorbur etc. Greasing of all these parts. Opening of reservoir, rectification of air leakage through NRV, safety valve, replacement of consumable spares such as control valve seal, roller O-Rings etc. and other damaged rings of mechanism assembly if necessary. Rectification of gas leakage from gas pipe assembly by replacment of O-Ring & brazing .checking and retightening of electrical connections. Satisfactory operation of all these breakers from local as well remote of the breakers installed at 400KV & 220KV Substation sultanpur including all cost of men and materials and T&P etc for completion of the job. measurement of closing and tripping timings of CB. Measurement of contact resistance of all the three poles of CB. i.- 240MVA ICT-II (ABB Make) ii. 220KV TBC Bay ABB make.

Overhauling of each pole mechanism assemblies of CGL make 245KV SF6 circuit breaker(each breaker having 3 pole assembly). The job include overhauling of control assembly, opening latch, closing latch, support latch, anti pumping assembly, opening and cleaning of motor charging system, cylinder shock absorber, closing damper etc. and adjustment of all types of gaps.cleaning and greesing of levers, connecting rods, cam, disc cam and other parts, opening of different mechanism assembly for rectification of wear and tear along with rectification/repairing(whatever required) of rollers and linking of mechanism assembly, checking of motor limit switch, auxilliary contactors, power contactors and all electrical connection and tightening them replacing them if required, replacement of O-rings and brazzing of gas pipe assembly of the mechanism, ensuring satisfactory operation of breakers from local and remote, testing of closing , tripping time along with contact resistance ,mesurement of listed below 220KV breakers at 400KV subsatation sultanpur. all skilled service engineers, materials and T&P required for satisfactory completion of job is to be provided by contracor. i. 315MVA ICT-I (CGL make)

Complete overhauling of compressure installed with 245KV Circuit Breaker of following CB of 400KV S/S Sultanpur. Work also include cleaning nad replacing of all gasket draing of old lubricating oil. Clening of reserve oil, assembling the compressor after complete overhauling and commissioning the same including replacment of wornout V-Belt and filling of compressor oil and testing of compressor for its smooth running upto rated air pressure all cost of material and T&P and labour. The work also includes oiling and greasing compressor motor. i. 240MVA ICT-II (ABB make)

Power System and Controls

Lucknow Electric House