MID/AN/77

Repair/Strengthening of 200KVA(Copper wound) Electric transformer with allied works installed at LIS Dabber Potha. (a)Repair / Strengthening of 200 kVA (Copper wound) Electric Transformer installed at L.I.S Dabbar Potha by way of disconnecting transformer from main power H.T supply also removing the L.T cable connections and then lifting the transformer from the installed/existing place with the help of chain pulley block very slowly to avoid any more damage to the transformer and then placing the transformer on the ground. With the help of tripod stand and chain block, extraction of core after removing of nut bolts etc & then extraction of complete damaged coils of HT & LT side . Providing and fitting of H.V leg copper coil 01 complete phase (approx 55kgs.) with insulation varnishing and also Complete insulation, varnishing of L.V leg coils complete with high grade material. Complete lamination of core. Providing & fitting of H.V bushing and metal parts – 02 Nos. L.V bushing and metal parts – 02 Nos. L.T terminal plate – one set , set of gasket, , Toping of transformer oil - 85 ltrs of high quality along with filtration & heating of T. Oil . With the help of chain pulley block and tripod stand , shifting the transformer to its actual position. Connecting 11 KV power line supply to H.T side of 200 KVA repaired / rewinded transformer and connecting power cable to L.T side of transformer. Job includes gas welding to transformer fins to avoid the leakage of transformer oil /entry of rain water etc. Job includes all type of material charges, assembling & dismantling charges, manual labour charges , charges for deployment of tools & tackles etc. i.e shifting of chain pulley block, tripot stand etc. also labour charges for skilled and semi-skilled workers . Job also includes commissioning and testing on load after charging the transformer. Complete Job. (b)Replacement of completely damaged 400 ampere high rupturing component HRC main switch used for disconnecting the main supply of transformer to voltage stabilizer installed at LIS Dabber Potha by way of removing all incoming and outgoing connections, Extraction of damaged/wornout main switch by way of cutting the worn out clamping bolts. Providing /fitting of new HRC 400A main switch of any reputed make with rated voltage of 415V.Removing of damaged thimbles from the cables of outgoing side. Job also includes P/F of new single core Aluminium cable 185Sqmm of 12 metres. Job includes cutting of 12 metre cable into 3 pieces of equal length approx. 4 metre each.It also includes properly thimbling of all three pieces to both sides/ends by crimping tool and tightening the same after fitting the climping bolts with proper alignment. Giving all electrical connections with main switch incoming and outgoing. Testing/commissioning at no load and then on full load .Job includes cost of material, transportation, charges ,head load charges, labour charges for skilled and semi skilled workers for execution of job/handling the components. Also hire charges for deployment of tools and tackles etc. Complete Job.

PERFECT ELECTRICAL WORKS (BID ID -2203257)

NATIONAL ELECTRO-MECH COMPANY (BID ID -2199147)