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| 1 | Opening of HV/IV/LV/N bushing jumpers to isolate T/F unit |
| 2 | Providing of dry air generator with dew point meter at the time of dismantling of bushing, internal inspection and erection of bushing. Dew point of dry air will be as per requirement of OEM Service Engineer./ Engineer Incharge |
| 3 | Carriage of 1 No. 20 KL oil storage tank from 220kV Substation Bah ( Manikpur) (Approx 30km) to 765 KV S/S Fatehabad, Agra ( if required) |
| 4 | Drain out of T/F oil of 500 MVA T/F from radiator, conservator tank, main tank (As per requirement) and fill in empty oil tanker/drum by the help of centrifuging machine. |
| 5 | Dismantling of main and detection water pipe lines of emulsifire system near inspection cover/required area of 500 MVA T/F and its shifting to safe place. |
| 6 | Dismantling of 01 No. IV bushing (400 KV) and opening of inspection cover of 500 MVA T/F |
| 7 | Safe shifting of old IV Bushing (400kV) from site to Open Store and New IV Bushing (400kV) from Store to work place near 500MVA ICT-II R Phase unit. |
| 8 | Proper taping of IV bushing lead applying crape praper tap along with cotton tap etc (provided y the contractor). and connecting with bushing thumble as per directionof OEM service engineer/ Engineer In-Charge |
| 9 | Erection of 1 No. IV bushing and replacement of gasket (provided by contractor) of IV side bushing and inspection window of 500 MVA T/F |
| 10 | Re-filling of T/F oil from oil tanker to 500 MVA T/F main tank by the help of centrifuging machine (Centrifuging machine of 12 KL/Hrs with operator shall be provided by the contractor) |
| 11 | Centrifuging of T/F oil in main tank and circulate theT/F oil through centrifuging machine till the result of oil optained upto desired value of BDV/water content (PPM) and taking BDV time to time (Centrifuging machine of 12 KL/Hrs shall be provided by the contractor) |
| 12 | Testing of Centrifuged T/F oil from Govt. approved Laboratery by collecting of sample. All the T&P will be provided by the contractor for following test of 500 MVA T/F as per IS 1866/IEC 60422 |
| 13 | DGA |
| 14 | Water Content |
| 15 | Specific Resistance |
| 16 | Dielectric Dissipation Factor |
| 17 | Total Acidity |
| 18 | Inter Facial tension at 27° C |
| 19 | Breakdown Voltage |
| 20 | Flash Point |
| 21 | Sample collection and transportation charges up to NABL approved lab |
| 22 | Providing testing equipment with engineer for testing of T/F such as Tan delta and capacitance of bushing and winding with variable frequency.Turn ratio testPolarity testMagnetizing currentShort circuit testWRM |
| 23 | Erection of main and detection water pipe lines of emulsifire system near inspection cover of 500 MVA T/F. |
| 24 | Connection of jumper HV/IV/LV/N bushing including all other associated work to complete the job satisfactorily as per direction of OEM service engineer/engineer incharge |
