Overhauling and Re insulation of ILMS 2 Nos. of 20KW capacity each released from ECHS conveyor

Amount

Overhauling works of 20KW capacity ILMS i) Towards draining of oil & collecting in barrels & handing over at stores. ii) Removing top cover and terminal cover using cutoff/grinding wheel. iii) Checking and testing the terminals and winding for any damages. iv) Locating the fault by surge comparison test, attending damages in terminal bushings and take off leads. v) Re-fixing of top cover by welding & transportation to workshop for overhauling of ILMS. vi) Refilling of oil in ILMS after re-insulation works and assembling. vii) Testing of the overhauled ILMS and test report to be produced. viii) Hire charges for transportation of ILMS from NCTPS site to work shop and vice versa, crane charges, T&P and consumables are in contractors scope. ix) Old oil to be devoluted to NCTPS-I store.

Re-Insulation of defective coil of 20KW ILMS. i) Removing the defective coil from core. ii) Cleaning the core with cleaning agent and polishing the coils. iii) Providing class H insulation for the conductors of the coils applying epoxy varnish. iv) Fabrication of new farmer and fixing the re-insulating the coil in the core. v) Pressing the coil by Hydraulic press and tightening the windings. vi) Pre-heating the over, bracing the joints and ends of the coils including Supply of required Epoxy Varnish. vii) Special ‘NOMEX’ Insulation (380GSM, size-XXL), Fiber Glass tapes, Epoxy compound, Epoxy Sheet, etc are in contractors scope. Note: Transformer oil will be supplied by TANGEDCO from NCTPS stores (TANGEDCO scope)

Chennai Radha Engineering Works (P) Ltd.