Transformer Overhauling

Amount

Charges for overhauling 6.6 KV / 433 V Transformer 2 MVA capacity each at LCSS-II Tr-1 and LCSS-III Tr-2 in ECHS which involves following work, a) Draining of existing oil from the transformer. b) Opening of Top cover and removal of core & winding from transformer. c) Cleaning the transformer core with hot oil and checking the core tightness. d) Improving the IR value e) Painting of transformer housing both inside and outside (including inserting the core with winding assembling cost). f) Releasing of air .g) Complete testing.h) Cleaning the radiator and cable box (HV and LV side) .i) Filling up of filtered oil after creating vacuum including oil filtration cost. .j) Assembling & closing of top cover.k) Changing all gasket, washer and oil seals with materials in contractors scope.l) Charges for supply & replacement of new conservator tank with MOG for 6.6KV/433V including fabrication materials .m)Charges for supply & replacement of OTG micro switch and WTG micro switch with 3M capillary including cost of materials .n) Charges for supply & replacement of Bucholz Relay including cost of materials.o) Transportation of overhauled transformer, testing and commissioning at NCTPS-I site. Note: New Transformer oil will be supplied by TANEDCO and old contaminated oil to be devoluted to the NCTPS-I stores by the contractor.

KAARTHIKEYAN ENTERPRISES

V RADHAKRISHNAN