Power Transmission Corporation Of Uttarakhand Limited Tender

220KV SUBSTATION PIRAN KALIYAR Following work to be carried out for preventive maintenance on quarterly basis of 2 No. of 220/132kV 100 MVA T/F: 1. Checking of oil level in main & OLTC conservator tank and bushings. 2. Attending minor oil leakage/seepage from main body/conservator tank/radiator of transformer by tightening. 3. Tightening of all bushing clamps & repacement of damaged/defected clamps and connectors. 4. Rectification of electrical fault of auto/manual operation of cooling fans by replacement of electrical equipment like contactor, MCB, relay etc. 5. Tightening of neutral and main body earthing. 6. Cleaning and washing of transformer main tank/radiator etc. 7. Tightening of all electrical connections in transformer marshalling box & applying CRC. 8. Testing of WTI, OTI, buccholz relay and PRV. 9. Any other work as per site requirement of as per direction of site incharge.

Following work to be carried out for preventive maintenance on quarterly basis of 2 No. of 220/33kV 50 MVA T/F: 1. Checking of oil level in main & OLTC conservator tank and bushings. 2. Attending minor oil leakage/seepage from main body/conservator tank/radiator of transformer by tightening. 3. Tightening of all bushing clamps & repacement of damaged/defected clamps and connectors. 4. Rectification of electrical fault of auto/manual operation of cooling fans by replacement of electrical equipment like contactor, MCB, relay etc. 5. Tightening of neutral and main body earthing. 6. Cleaning and washing of transformer main tank/radiator etc. 7. Tightening of all electrical connections in transformer marshalling box & applying CRC. 8. Testing of WTI, OTI, buccholz relay and PRV. 9. Any other work as per site requirement of as per direction of site incharge.

Following work to be carried out for preventive maintenance of 220kV Bays (CB, CT, PT, LA, Isolator & Wave trap) on quarterly basis (8 Bays x 4 times = 32) 1. Tightening of clamps & connectors and replacement of the same if found damaged/defective. 2. Cleaning of Porcelain insulator and checking of damage. 3. Replacement of rusted nuts/bolts of CT, PT, LA, CVT etc.. 4. Top up of oil after checking oil level in CT/PT/CVT. 5. checking of healthiness of surge arrestors. 6. Apply CRC in junction boxes of CT, CVT etc. 7. Checking & tightening of equipment earthing. 8. Any other work as per site requirement of as per direction of site incharge.