Repairs to 250 KVA HT/LT Distribution Transformers at Sagipora L.I.S of MISD Handwara.

Amount

Isolating the transformer from HT side by means of dropping the link set, discarding the HT cable, disconnecting the LT Cable from bush rods lowering of transformer from bed, loading in Pvt. Vehicle by way of engaging a crane at site, carrying up to workshop unloading it for necessary repairs at workshop.

Opening the lid of transformer and draining the carbonized T-Oil discarding the LT/HT connections from LT/HT rods, taking out the assembly of tank. The job includes dismantling of core assembly and coils to thoroughly check the damages.

Providing and fitting of 08 No. fresh HT coils in appropriate size of aluminum wire as per sample. The job includes providing and fitting of insulating material like HT paper, lathered, cotton tape, sleeves, varnishing of the coil and heating in the heating chamber.

Providing and fitting of insulation material such as separators, core sheets, card boards Bakelite tubes sleeves nuts and bolts connecting bars etc.

Retaping of 01 no. LT leg by using superior class insulating material.

Providing and filling of fresh T-Oil for topping

Filtration and Dehydration of T-Oil.

Reassembling of transformer by way of fitment of HT coils, core after cleaning, clamping channels, nuts/bolts heat treatment of the assembled transformer, fitting top transformer lid and testing on no load at workshop. Loading of transformer in a private load carrier, carriage up to site, unloading and installation at site with the help of crane and testing on full load. The entire job shall be carried out through skilled labourers by using special tools and tackles including full load test at workshop.

Deduction cost of old scrap as 80% of weight of coil or as per actual.

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