Repairs to 250 kVA Al wound HT/LT distribution transformer of Hibdangerpora Lift Irrigation scheme of MISD Sopore

Amount

Isolation of the 250 kVA Aluminium wound transformer from HT side by means of dropping the link set, discharging the HT cable, disconnecting the LT cable from bush rods lowering of transformer from bed at Hibdangerpora LIS, loading in private vehicle carrying upto 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 from tank. The job includes dismantling of core assembly and coils as well checking the damages. Providing & fitting of fresh HT coils in appropriate size of Aluminium wire as per sample. The job includes providing & fitting of insulating material like HT paper, lathered, cotton tape, sleeves, varnishing of the coils etc.(38kg), Providing & fitting of insulation material such as separators, core sheets, card boards Bakelite tubes sleeves nuts and bolts connecting bars etc. Topping of the transformer by providing & filling fresh T-Oil (50L). Filtration of the existing T-Oil (250L approx.). Replacement 2No.LT bush rods as per sample with bushes and cups. Reassembling of transformer by way of fitment of HT coils, core after proper cleaning, and clamping channels, nuts /bolts heat treatment of the assembled transformer, fitting of top transformer lid and testing on No load at workshop. Loading of the transformer in a private load carrier through skilled labourers by using tools and tackles at site and unloading and testing on full load. Deduction cost of old scrap as 80% of weight of coil or as per actual

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