NIQ No- 222/PHE(C)/BMC, Date- 27/06/2024

Amount

Temporary laying of cable above 31/2 core 90 sq.mm. and up to 31/2 core 150 sq.mm. on wall/surface including S&F MS clamps with earthing attachment in 2 X 10 SWG GI (Hot Dip) wire making hole etc. as necy mending good damages and painting including different type of socket and caring cost (for temporary line from WBSEDCL sub station to WT-16)

Dismantling the faulty 11/433 KV 250 KVA out door type transformer all incoming & outgoing cable end then unloading the transformer on existing platform by engagement of skilled manpower & also necessary tools & tackles as required as per direction of EIC.

Dismantling & opening the top cover from the transformern tank including taking out of transformer oil lifting the care assembly & keeping it at a suitable place dismantling of damaged HT coil including wire change of tools & tackles

Complete servicing overhauling cleaning of Transformer tank oil level indicators, drain cocks, vent pipe etc. and boxing up of core & coil in transformer tank including all type of electrical connection inside the tank including supply of gasket, packing nit bolts complete as per direction of EIC.

Supply of new transformer oil as per ISS including filling as per direction of EIC. For transformer and HT gear

Transformer oil filtration by centrifuge de-humidification process

High voltage testingof transformer winding as per IE rule & specification 23 KVA one minute with sand, in presence of EIC.

Emergent basis dismantling the main HT gear unit GEC make 11 KV burned VCB part by part with cleaning resin varnishing N.C. thinner, C.T.C etc. & fitting of bottle bushing contact point inter link connector bar with all item of VCB rear side mechanism portion & tripling arrangement of gear unit servicing all side & painting inside outside main incomer & supply unit completed as per direction of EIC.

Dismantling the relay unit then testing the same by testing kit, Insulation unit testing & checking with necessary heat varnish painting heater unit thermostat power pack unit panel to panel DC source wiring with 2.5 Sq. mm. copper flexible wire and flat copper socket etc. as per direction of EIC.

Refitting & refixing of top cover along with gasket packing incl. supply of cork/ rubberized gasket with necessary bolts nuts washers etc. incl. re fitting & topping up transformer oil upto the desire level as per instructionof EIC after supply & re fixing of two set of porcelain bushing insulator for HT & LT side with brush stud along with packing washers etc. (inside & Outside) incl. top cover packing complete.

Heat treatment of switch equipment to make it moisture free with the help of glowing Hi power incandescent lamp/ halogen lamp continuously for 3 days in order to improve the insulation resistant of its power circuit complete as per direction of EIC.

Painting of existing old transformer with necessary scrapping complete as per direction of EIC

D.C.Eng.Co

DURABLE ENTERPRISE