ELECTRICAL WORK

Amount

Overhauling of pneumatic mechanism assembly of 400 KV SF-6 Circuit Breaker of HV side of 315 MVA ICT-I, CB No. 981 at 400 KV Greater Noida Substation. In all three poles mechanism assembly. -Dismantling of control valve assembly along with copper band pipe from breaker. -Complete dismantling of control valve assembly by cleaning of its parts by cleaning agent replacement of control valve O-ring P 80, cap seal assembly, C&D roller & refitting the control valve with its proper adjustment. -Dismantling of main closing spring, cleaning of piston drum, checking of shook absorber lubrication. -Dismantling of close/trip coil assembly, clean its plunger, lubricant and adjust of its air gap. -Dismantling of horizontal rod, pins and it’s linkage cleaning and lubricant . Checking of all air pipe line and accessories. Replacement of all O ring P 80 from pipe line and replacement of NRV, safety valve, if required. Checking and tightening of all electrical connection in marshalling box. Re-Fixing of pneumatic mechanism assembly with proper adjustment. Checking satisfactory close/trip operation of circuit breaker both by local and remote end. (All consumable items like control valve seal, o ring P80, cap seal will be arrange by contractor.)

Cleaning of all four cubicals related to this CB, Oiling & greasing of moving parts of operating mechanism for smooth operation and healthiness of Circuit Breakers.

ishu brothers

Agni Automation and Security