annual maintenance contract of 132 kv s / s lal tappar under oandm div yamuna colony , dehradun , quaterly maintenance of 33 kv feeders complete work including tightening of nut & bolts of all ct , cb , attending oil leakage from cts . greasing , oiling of cb , cleaning of all equipements of the feeders and helping in routine testing . , quaterly maintenance of 132 kv feeders complete work including tightening of nut & bolts of all ct , cb , line isolators clamps , jaws , blades , attending oil leakage from cts . greasing , oiling of isolators / cb , cleaning of all equipements of the feeders and helping in routine testing . , complete maintenance of 33 kv main bus and all 33 kv bus isolators including tightening of all nuts bolts of dropper and jumper and clamps etc . , complete maintenance of 33 kv jack / transfer bus and all 33 kv jack / transfer bus isolators and line isolators including tightening of all nuts bolts of dropper and jumper and clamps etc . , complete maintenance of 132 kv main bus and all 132 kv bus isolators by tightening of all nuts bolts of dropper and jumper and clamps etc . , complete maintenance of 132 kv transfeer bus and all 132 kv transfer bus isolators by tightening of all nuts bolts of dropper and jumper and clamps etc . , half yearly complete maintenance of 132 kv / 33 kv 40mva transformers by tightening of all nuts bolts of dropper and jumper and clamps cleaning h . v . & l . v . bushing etc and helping in routine testing . , half yearly complete maintenance of 33kv / . 40 kv 250 kva station transformers by tightening of all nuts bolts of dropper and jumper and clamps cleaning h . v . & l . v . bushing etc . , refilling of oil in transformers , ct , pt after centrifuging oil upto required bdv . , refilling of sf6 gas in 132 kv / 33 kv circuit breaker to maintain required pressure ( sf6 gas will be provided by department ) , replacement of damaged , burnt , defective defferent dropper , jumper , runner , clamps / jaws / blades / male / female contact of isolators etc of 132 kv feeders , replacement of damaged , burnt , defective defferent dropper , jumper , runner , clamps / jaws / blades / male / female contact of isolators etc of 33 kv feeders , maintenance , repairing and replacement of lighting system in switchyard and substation premisses . ( material will be provided by department ) , maintenance , repairing and replacement of lighting system in control room , committee room , office and stores . ( material will be provided by department ) , providing a skilled person for daily dusting / cleaning of front of control and relay penals , all cabinates ( plcc , marshalling boxes , rtcc etc . ) by suitable cleaning agent excluding material . ( monthly ) , providing a skilled person for daily cleaning and routine maintenance of battery sets and charger etc . complete work including cleaning of battery terminal and refilling of destilled water and preparing of destilled water etc . ( monthly )