ELECTRICAL WORK

Amount

Following works for replacement of gasket of 20 MVA 132/33 KV BBL make at 132 KV S/S Dasna. Carriage of 25 KL Oil tank from available S/S including its Loading on trailer & unloading at 132 KV S/S Dasna with in distance of (50Kms)

Complete draining the transformer Oil from existing 20 MVA, BBL make T/F into empty oil tank including opening of valves. (Approximate 13.5 KL)

Dismantling of HV/LV Neutral bushing Turret from T/F tank. Radiators, conservator tank, explosion vent pipe connections and proper blanking of open space for replacement of gaskets.

Centrifuging of oil tank by connecting the centrifuging pipes, circulating the transformer oil through centrifuging machine to increases BDV.

Replacement of old & damaged gasket of 20 MVA BBL make Transformer by providing new gasket as per required side of good quality rubberized cork sheet of NU COCK/TALBROS make at required place of complete T/F including top cover & accessories.

Erection of 20 MVA T/F accessories as radiators HV/LV/Neutral bushing, bucholz relay, Oil pipe line, conservator tank, explosion vent pipe and diverter switch pipe line at original position complete in all respect.

Creating of vacuum in T/F main tank and maintain for 24 Hrs.

Topping up of oil in T/f main & centrifuging of oil in the transformer. Taking the IR/BDV value of period of 4 Hrs. at per norms of T/F manufacturer of till the desired values are attained filling of centrifuging machine shall be arranged by the contractor at his own cost.

Overhauling of diverter switch, removed the dirty oil from its chamber, cleaning the ‘D’ chamber check the contact and filling the fresh oil.

Cleaning the core & main tank to remove the sludge by hot Oil.

Spray painting of 20 MVA T/F BBL make with one coat of red oxide & two coats of standard make light grey 608-4 synthetic enamel paint of first quality after cleaning of rust, dust & oily surface including cost of all material labor & T&P as per technical specification.

Meena Elect & Engg. Works