FOR INTERNAL INSPECTION WORK OF 500 MVA ICT TOSHIBA MAKE POWER TRANSFORMER AT 400 KV SUB STATION GREATER NOIDA UNDER ELECTRICITY 400 KV SUB STATION DIVISION GREATER NOIDA

Amount

Complete draining out of the Transformer oil (Approx. 118KL) from 500 MVA TF's Main Tank to empty oil drums. (02 Nos. 50 KL and 01 No. 20 KL).

Providing of Dry air plant/generator during the work of inspection in main tank of 500 MVA TIF at 400 KV SS Pali Greater Noida

Carriage 03 Nos (02 Nos 50KL and 01 Nos 20KL) Oil tanks from Store To working site and after completion of work Carriage 03 Nos (02 Nos 50KL and 01 Nos 20KL) Oil tanks from working site to Store.

Open inspection window (and replacement gasket) for Complete internal inspection of 500MVA Toshiba Transformer will be done Toshiba team.

Complete vacuum evacuation of 500 MVA Transformer main tank and filling of Dry air (dew point 64 degree C) or better in vacuum up to pressure of 0.25Kg/cm2 and the again evacuating the Transformer tank after required time interval (approx..12/24 Hrs.) using centrifuging machine (12 KLPH) The work shall including connecting pipe of machine as required measuring Dew Point values of Dry air after every cycle till the required value is achieved.

Filling T/F Oil in the main tank under complete vacuum in main tank.

Centrifuging of T/F oil and taking the IR/BDV value of T/F oil at an interval of 06 Hrs. or as per norm of T/F manufacture, after achieving the dew point value top up the centrifuged T/F oil at required level of Transformer (Centrifuging machine 12 KLPH shall be provided by the contractor.)

Complete Testing of 500 MVA TF which details is given below : (A) SFRA (Sweep Freq. Response Analysis)

(B) DGA (NABL)

Meena Elect & Engg. Works (BID ID -5754857)