Work

Amount

Following work are to be carried out at 220KV Sub-Station, Sitapur:- Overhauling of each pole mechanism assemblies of 245KV SF-6 Circuit Breaker (each breaker having three pole assembly.) The job includes overhauling of control assembly, opening latch, closing latch, support latch, anti pumping assembly, opening & cleaning of motor charging system, Checking all auxiliary contacts, cylinder shock absorber, closing damper etc. and adjustment of all type of gaps, cleaning & greasing of levers, connecting rods, cam, disc cam and other parts, opening of different mechanism assembly for rectification of wear & tear along with rectification/repairing (whatever required) of rollers and linking of mechanism assembly, checking of motor limit switch, Auxiliary contactors, Power contactors and all electrical connections and tightening them replacing them if required, replacement of 'O' rings and brazing of gas pipe assembly of the mechanism, ensuring satisfactory operation of breaker from local and remote, testing of closing, triping time alongwith contact resistance measurement of ilisted below 220KV Breaker at 220KV Sub-Station, Sitapur. All skilled service engineers, materials and T&P required for satisfactory completion of job is to be provided by contractor.

HV (220KV) Side of 200 MVA T/F Bay (Siemens Make breaker)

HV (220KV) Side of 160 MVA T/F Bay (CGL Make breaker)

220KV BKT Bay (GE Make breaker)

220KV TBC Bay (Siemens Make breaker)

220KV Kanduni Bay ( (CGL Make breaker)

Major overhauling of 220 KV circuit breaker of 100MVA Transformer-II

A. major overhauling of all three pole mechanism pneumatic type 245 KV SF-6 CB Abb make (Year 1992) The job includes overhauling of driving mechanism along with replacement of damaged and defective "O" rings, Sealing ring cuide ring, K-slot and damping gaskets. Overhauling of magnetic ventile along with replacement of damaged "O" rings, Checking all auxiliary contacts, Overhauling of control valve block along with replacement of defective D-slot, sealing of "O" ring. Overhauling of NRV and safety valve of air compressor along with replacement of Teflon/brass gasket. tension springs and other rusted locks/circlips overhaulling of NRV and air filter of switch cubical along with rreplacement of all defectieve gaskets. B.Taking closing and opening time of above CB. C. Measurement of contact resistance (CRM) of all three Poles.

Complete dismantling of ELGI/INGERSOL RAND make compressor installed at 220 KV SF-6 circuit breakers of 100 MVA T/F (HV) CB at 220 KV S/S Sitapur and their through overhauling by way of cleaninng and replacing all gaskets (Form manufacturer tune kit), draining of old lubricating oil, cleaning of reservoir, filling of new lubricating oil of suitable grade, Replacement of Compressor oil glass and contactor, assembling the compressor after complete, overhauling and commissioning the same including replacement of worn out motor drive belt and filling up lubricating oil in compressor reservoir with SAE-40 grade lubricating oil incldes oiling and greasing in mechanism & motors.

SWITCHGEAR AND TRANSFORMER CARE CENTRE (BID ID -4838684)

R.S.ASSOCIATE (BID ID -4849280)