for replacement of gasket of transformer

Amount

Replacement of 63 MVA T/F gasket & carriage of oil tanker at 220 KV Sub Station, Loni.

Complete drain out of transformer oil from main tank and filling in empty oil drums/20 KL oil tanker

Dismantling of turret HV/LV/N bushing all pipe lines radiator oil pump conservator etc.

Complete replacement of gasket of 63 MVA transformer including top cover turret bushing radiator inspection plate header valves pipe line etc.

Cleaning of core and winding by hot transformer oil and remove the slug from bottom.

Overhauling of diverter switch after removing of oil and dirty transformer oil from its chamber filling the fresh centrifuged transformer oil its centrifuged circulation as per norm of transformer.

Complete Erection of 63 MVA transformer by erection of radiator conservator tank bushing with its turret (If available) turret HV/LV/N bushing all pipe lines radiator oil conservator tank etc.

Complete evacuation of main tank of the T/F and filling of dry air of dew point -400C or better in vacuum up to pressure of 0.25g/sq. cm and the again evacuating the T/F tank after required time interval (approx. 12/24hrs.) using certified machine. The scope of work involves measuring dew point values of dry air after every cycle till required value is achieved.

Creating of vacuum inside the tank for period for 12 Hrs. and filling of centrifuged oil step by step up to core & winding conservator tank radiator.

Centrifuging of transformer oil already filling in main tank taking the IR/BDV value of transformer oil in interval of 6 Hours as per norms of transformer Mfg. till the desired value and top up the oil at required value Quantity of oil approx. 25 KL (Centrifuging Machine shall be provided by the contractor).

Carriage of Oil tanker 20 KL including loading unloading & carriage Approx. 100 KM

Meena Elect & Engg. Works

SUN ENGINEERING WORKS

Gupta Elect and Engg Works