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| 1 | Unloading of the Faulty Transformer tank with active parts and accessories at firms work or loading of repaired Transformer tank with active parts or accessories at firms works. |
| 2 | Dismantling faulty Transformer for joint inspection at repairers premises including all activities such as opening of top cover, de-tanking of core and winding, conducting preliminary test required for assessment of repair work to be undertaken, dismantling core etc., in the presence of KPTCL authorised representative. |
| 3 | New condenser type OIP Bushing for Y phase specifications (As per sample)Rated Voltage:72.5 KVRatedCurrent:800A Rated Frequency:50 Hz1 Min 50 Hz dry with stand :160 KV |
| 4 | Y phase HV Takeoff lead brazing |
| 5 | Tan delta testing for bushings |
| 6 | Draining out oil from the power transformer complete duly collecting the oil in barrels, shifting barrels to safe place with proper tightness of cork/lid to avoid entry of moisture. |
| 7 | Cleaning, repairing (including leak test)and painting inside the transformer tank with Hot oil bath and acid proof epoxy paint and painting outside the tank with enamel paint after thorough cleaning including the cost of materials including the painting of radiators and conservator tank at site |
| 8 | Drying out the assembly of the core and winding in oven/vaccum chamber, till the specified insulation resistance values are obtained(including cost of material and labour) SL.No.5 (iv)(b), Page No.121 |
| 9 | Tanking the assembly, giving connection, providing new gaskets and insulating materials conforming to relevant ISS, putting back the cover, tightening the fixtures, fixing the bushing etc., including the cost of all materials like gasket, insulating materials, bolts and nuts etc., and labour. Other accessories at repairers work to facilitate the testing. |
| 10 | Filling of oil to the main tank and OLTC tank, filtering the oil including filtering till attainment of prescribed BDV values including labour, filtering equipment along with accessories. The minium BDA value shall be 50KV |
| 11 | Testing-of-Transformer a) Testing the transformer for routine tests as per IS 2026-1983 if repairs are carried out at repairers work. b) Testing the transformer for IR values, voltage ratio at all taps, short circuit test, magnetic balance, Magnetising current measurement at low voltage from HV and LV. Magnetising current measurement at rated voltage from LV side. |
| 12 | Supervising and commissioning of Transformer in the presence of RT staff as and when the transformer is ready for commisioning. |
| 13 | Transportation of the Transformation from site to workshop and back to site after attending repair works including loading and unloading charges with 12T crane etc., complete as directed by the the Engineer in charge for finished item of work (Approx) |
