Wrok

Amount

Work for repair & Overhauling of 145 KV CGL/ABB make Circuit Breaker by doing following work in each breaker:-Opening/Dismantling of control value assembly, cleaning of cap seal cylinder, removal of defective roller, re-fixing of new roller, reassembly of control valve assembly in mechanism, replacement of control valve seal & bent O-ring, opening of anti-pumping pin assembly cleaning, de-rusting & lubrication of anti-pumping pin assembly. Replacement of spring in anti-pumping. Opening and cleaning of closing spring, shock absorber, pneumatic cylinder, cleaning of piston & cylinder including their assembly, replacing of oil & O-ring, opening and reassembling of trip coil assembly after cleaning of its various parts including measurement of resistance, adjustment of trip coil gap. Replacement of NRV & Drain valve. Checking of air switch i.e. governor switches, low air pressure alarm switch including adjustment. Checking of gas density switch including all adjustment. De-rusting lubrication of horizontal rod assembly & its various linkages, cleaning of bar pins, replacement of circuit. Show operation of circuit breaker with help of manual jack for checking over stroke, wipe, poles travelling etc. for satisfactory Operation of 132 SF-6 CB. C.B Details:- 1. CB No.72(Commissioning/MFY 2007) at 145 KV Babugarh line bay 2. CB No. 702(Commissioning/MFY 2013) 145 KV 40 MVAR Capacitor bay

Repair &overhauling work of 33 KV BHEL/CGL/Simens/ABB /Shreem make VCB by checking and adjustment of snatch gap, travel of drive insulator rod, tie rod. Dismantling of operating mechanism of 33 KV VCB from Cubical. Repair of opening and closing mechanism by welding drilling, matching & filling of material as per requirement. Oiling and greasing of crank gears by opening of lock, circuit etc. Replacement of worn out parts such as bush, ring, lock pins & latch etc.to get the repair work complete. After repair of operating mechanism fitting the mechanism at in original place in CB cubical. Fitting of tripping and closing coil with open and close mechanism. Now checking & adjustment of snatch gap, travel of drive insulator rod, tie rod. Checking and adjustment of slow closing and operating of breaker. Checking and adjustment of oil dash-post of breaker for its damping action. Carry out HV test of CB pole and proper adjustment of link rod. After successful overhauling checking of megger values of breaker poles. Checking of VCB operation mechanically and electrically. Checking and adjustment of spring charge timing. Carrying out contact resistance measurement, and checking tripping of breaker at 80% of DC voltage Prepare and submit the site overhauling report of each breaker. C.B Details:- 1. CB No.10(Commissioning/MFY 2013) at 33 KV Garh Ist

Checking Opening & Closing time of 132kV VCB

Checking Opening & Closing time of 33kV VCB

SARASWAT ELECTRICALS (BID ID -5360497)

SATKAR TRADERS (BID ID -5360717)