Annual Maintenance of Electrical Installation of Haringhata Dairy, Nadia for the year 2023-24 -- Repairing and Servicing of 250 KVA 3 Nos. and 500 KVA 2 Nos. Oil type Transformer

Amount

Charge for inspection of 250/500 kVA transformer to identify and rectify various defects within it to perform satisfactorily as per direction of EIC.

Dismantling of HT & LT Cable end termination by skilled workmen using special type tools & tackles as per direction of EIC.

Drain out the transformer oil for lifting the core and core assembly and pouring it in empty clean drams.

Dismantling the top cover of transformer after draining the damaged transformer oil and Supply & Fixing the 6 mm thick gasket for top cover with necessary quantity of hold rite dendrite etc. per direction of EIC.

250 KVA Transformer

500 KVA transformer

Charges for lifting the core and core winding assembly of the transformer from the transformer oil tank after dismantling the tap changing switches by special loader, steel tripod stands, chain pulley, steel ropes, steel clamps with sufficient trained technical persons including hire charges of above mentions tools & tackles and kept the core and core assembly on proper tray on the repair bench.

250 KVA Transformer

500 KVA transformer

Charge for servicing of transformer by hot jet wash after opening 4 sets of LT bushing and stud rods properly, cleaning the cores by soft brush and soft clothes after drying the cores & winding should be cleaned by Carbon tetrachloride solution properly for de-moisturize and raise the I.R. value & changing 4 Sets O-ring at radiator to stop leakage as per direction of EIC.

250 KVA Transformer

500 KVA transformer

S & Instn. of Bushing at HV & LV Side of Transformer in replacement of damaged one as per direction of EIC.

250 KVA Transformer

500 KVA transformer

S & Replacing Transformer oil seal as per direction of EIC.

250 KVA Transformer

500 KVA transformer

Charge for cleaning sulphur from Bus bar at both LV & HV Side of Transformer after dismantling from transformer & reinstalling the same after servicing as per direction of EIC.

250 KVA Transformer

500 KVA transformer

Reinstallation of transformer after washing & cleaning the tank by transformer oil and dried the total surface by cotton cloth and inserting the core in oil tank with proper care, by special loader , steel tripod stands , chain pulley , steel ropes , steel clamps with sufficient trained technical persons & tightening of all joints, megger testing of winding etc. as per direction of EIC.

250 KVA Transformer

500 KVA transformer

BDV Test of Transformer Oil before Filtration and Dehydration from reputed concern as per direction of EIC.

Silica Gel Replacement of Transformer Breather as per direction of EIC

S & F nut bolt (HSS) as per direction of EIC

S&F nut with double washer (Brass) as per direction of EIC

Supply & pouring New Transformer Oil confirming with IS Specification for the following as per direction of EIC

Dehydration & filtration of transformer oil for improvement of dielectric strength.

Testing of dehydrated & improved di-electric strength of transformer oil after and before filtration and de-hydration.

Carrying charge of Transformer Oil, Filter Machine, Testing Equipment etc. UP & DN

Hiring Charge of welding machine with skill welder /manpower including cost of welding filling rod etc.

Hiring Charge 5 KVA 50 Hz Diesel driven generator set with both ways transportation, installation & dismantling cost of DG set incl. Diesel, operator and connecting cable as reqd. as per direction of EIC.

Electromech Engineers Co-Operative Society Ltd.

SUNLIGHT CONSTRUCTION

UNICON