EM I HTSWGR Annual Maintenance of 6.6 KV switch gear panels and breakers in 1A 1B and C1 buses during the Overhauling of Unit I for the year 2021 22

Annual Maintenance of 6.6 KV HT SWGR Panels. Charges for releasing the back doors (top and bottom), Bus separator, racking out of HT Breakers/ Bus VT and cleaning of all the released doors and checking of IR value of Bus. Charges for complete cleaning of Horizontal, vertical busbars Panels and supporting insulators with the help of air blower and Acetone , tightness checking of Horizontal, vertical bus-bars and outgoing power cable terminals. Charges for re-fixing of back doors(top and bottom) by providing all bolts and nuts racking in the HT breaker and checking of IR value and satisfactory commissioning.

Overhauling of 6.6kV, ABB make SF6 gas breakers: Overhauling of H.T breakers, mechanism, cleaning and oil lubricating and breaker wiring tightness checking. Breaker operation and interlock arrangements checking.(6.6kV, ABB make SF6 gas breakers)

Transporting of 6.6kV, ABB make SF6 gas breakers: Transporting of breakers to MRT test bench, preparation of breaker for contact resistance test and closing /opening time test, cleaning of contacts if required, transporting the tested breaker again to the panels (6.6kV, ABB make SF6 gas breakers)

Overhauling of 6.6 KV MOCB HT breakers: Breaker mechanism cleaning, tightness checking and lubricating all the poles in the breaker tightness checking, existing oil in all the poles releasing poles flushing and filling with new oil. Breaker operation checking mechanically and electrically. Breaker outer surface cleaning using surf.

Supply of Gada cloth for cleaning the HT buses, panels, breakers, bus PT, Cable end PT and Links.

Supply of Acetone

Supply of petroleum jelly

Supply of surf

Consumables (painting brush, various sizes)

RAYAN AND COMPANY