8291 REPAIRS, RECONDITIONING OF 5 MVA, 33,11KV TRANSFORMER UNDER AGE (I) RnD NSTL, VISAKHAPATNAM

Amount

M&L for isolating the HT supply of transformer, disconnecting 33/11 kV connections of transformer by opening clamps, bus bar extension and isolating the cables from transformer of capacity 5 MVA, 33/11 KV and shifting the same from MRS at NSTL to workshop for repairs and reinstalling the same after repairs in position complete including handling with hydraulic crane, transportation charges etc. all as specified and as directed. Note :- (i) Repair/ replacement of transformer parts shall be measured and paid separately under respective items of BoQ. (ii) The unit rate quoted shall be deemed to include for the cost of shifting of transformer to workshop and back to position.

Opening the transformer of capacity 5 MVA, 33/11 KV, draining out transformer oil completely, lifting the top cover and core assembly carefully and separation of burnt winding, cleaning the core complete all as specified and as directed. Note: Rewinding of transformer shall be measured and paid separately.

M&L for rewinding and re-insulation of HV coils (3 limbs) of 5MVA, 33/11 KV transformer with appropriate turns and size of super enameled copper winding strip including filling insulating paper, etc., complete all as specified and as directed. Notes: (i) The unit rate quoted shall be inclusive of varnish sleeving of insulating material (ii) Weight of copper coil only shall be considered for payment.

M&L for re-insulation of existing LV coils (3 limbs) of 5MVA, 33/11 KV transformer with suitable insulation materials including filling insulating paper, etc., complete all as specified and as directed. Notes: (i) The unit rate quoted shall be inclusive of varnish sleeving of insulating material (ii) Weight of copper coil only shall be considered for payment.

M&L for reassembling of windings with new insulation materials, top core filling, connections frame fixing, brazing and taping of all connections, drying the core in heating chamber for improving IR values, complete all as directed

M&L for carrying out repairs & replacements of motor, carbon brushes etc. including complete overhauling of OLTC complete all as directed.

Supply and filling new transformer oil for transformers duly filtered with filtration plant to obtain dielectric strength not less than 60 KV complete all as specified and as directed including draining out the old oil from the core. [Make : Poweroil/ Electrol/ Savitha/ Tashol/ Servo]. Note :- (a) The transformer oil shall be type EHV confirming to IS - 335/1983. (b) Mineral oil grade shall be used. (c) The IR value of transformer oil shall not be less than 60KV/min. (d) The unit rate shall be deemed to include the cost of filtration to achieve desired di-electric strength.

Re assembling, Testing and Commissioning the 33/11 KV, 5 MVA transformer at Site after carrying out rewinding and reconditioning complete including spray painting with Silicon acrylic heat resistant paint of approved quality & colour all as directed.

Carrying out relays testing complete of existing VCBs connected to transformer after completion of all connections prior to inducting into service all as directed and as specified

M.V.K.ENTERPRISES