Installation of 160 MVA Transformer in place of 100 MVA Transformer

Shifting of 160 MVA T/F main tank including turning the T/F as per orientation of switchyard from unloading place to existing T/F plinth by dragging distance of about 30 Mtrs.

Additional shifting @ 5MTR/Job

Filling the fresh T/F Oil in Oil-Tanker from oil Drums by Centrifuging Machine & Centrifuging of oil to increase the BDV of oilup to the desired value.

Complete Erection of 160 MVA T/F of BHEL make and accessories of HV/LV/TV side Bushing, Radiator, Conservator Tank, A Frame, Header, Pipe line, Pump, Cooling Fan , relays, prv , turrets CTs, etc and Top up the oil upto required level including shifting and complete erection of RTCC panel

Create the vacuum inside the 160 MVA Transformer tank upto the standard valve and stand the vacuum-machine upto 24 Hrs. If doesn't stand then recreate the vacuum after proper attending the leakage points and stand for 24 hrs / as per direction of supervising engineer.

Providing Air drying unit with operator suitable to achieve dew point -50deg C for a period of minimum 50 days for complete erection and commissioning work of 160 MVA BHEL make Transformer as per direction of Supervising Engineer of BHEL. The job includes filling dry air in the Transformer tank as and when required upto the complete erection and commissioning process of Transformer.(Dew point Meter duly calibrated and all required T&P to complete the job satisfactory will be providd by contractor himself.)

Providing N2 gas cylinders of Dew point -50deg C for erection and commissioning process of 160 MVA Transformer. The job includes filling N2 gas in the Transformer tank as and when required upto the complete erection and commissioning process of Transformer.(Pressure gauges as required duly calibrated and all required T&P to complete the job satisfactory will be provided by contractor himself.)

Carriage of 50 KL empty T/F oil tank for the centrifuging of T/F oil where it is available within distance of 50 KM approx.

Centrifuging of complete T/F oil in separate 50 KL oil tank for 3 cycles/until required value of BDV has been achieved by connecting centrifuging pipes, circulating the T/F oil through centrifuging machine and taking the BDV value , PPM values of the oil and IR values periodically till the required value is achieved as per direction of supervising engineer and repeating the same procedure in T/F main tank. The work includes all the work related to centrifuging of the oil and filling the oil in T/F and tank. (Operator and centrifuging machine, PPM testing machine, BDV machine, Megger shall be arranged by the Contactor).

Laying, Dressing and binding of cable including fixing of cable tray support structure and termination of cable marking the top and its ferruling as per schedule and inter connection including shifting of old cable as per requirement of RTCC panel, marshaling box, driving mechanism, C&R panel and all other works necessary before commissioning.

Earthing of T/F body, MB DM box OLTC, RTCC, neutral points and all other points as per direction of supervising engineer at two points using 75x10/50x6mm M.S. flat for 40 mm M.S. rod. For each point separate earthing flat should be connected to M.S rod.

Painting of earthing strip above the ground level by one coat of red oxide and two coat of bus green paints.

Dismantling/Erection of 132KV L.A. with structure and proper Tightening.

Preparing and fitting of ACSR Zebra Conductor Jumper on 220KV and 132KV side cutting of conductor and fixing of equipment (Approx. 12 Nos. Jumper).

ARK ENGINEERING

Gupta Elect and Engg Works