CA NO.CWE BLY/GE (W) / 07 OF 2023- 2024 SPECIAL REPAIRS OF POWER TRANSFORMER NO 03 INSTALLED AT 33 KV MRS BAREILLY UNDER GE (WEST) BAREILLY

Amount

Disconnecting all electrical connection from transformer and dismantling the components of transformer for easily loading (making the transformer air tight, packing) and unloading of defective 5 MVA, 33/11 KV copper wound transformer from 33 KV MRS Sub Stn Bareilly to workshop and back incl installation, testing and comissioning after repair including painting of complete transformer and its mounting structure complete all as specified and directed.

M&L for opening the top cover of transformer and carrying out the folowing work/repairs by speacialist Technician/ Engineer at factory work shop :- (a) Removing of transformer oil from transformer into seperate container & filling the new transformer oil. (b) Taking out the core/coil of transformer (c) Cleaning the transformer inside properly by used transformer oil as per manufacturers guidelines and painting with one coat of zink painting as per manufacturers norms. (d) Ovening in vapour phase drying oven at factory workshop for 72 hrs. (e) Re-tanking and assembly of core coil (f) Replacment of bushing,spindle,oil level indicator, winding temp gauge, oil temp gauge, drain valve of transformer. (g) Refixing of the transformer top cover with ,gasket, nuts, bolts and washers (h) Repair of radiator & replacement of defective plate of core as per existing size. Note : Cost of material will be measured and paid seperately. However cost of gasket/ hardware/ consumables required during the repair work for 5 MVA, 33/11 KV transformer at Workshop shall be deemed to be included in quoted rate.

M&L for re-winding of HV leg copper coil wire with new tripple paper cover (TPC) as per specifications of copper conductor for transformer of capacity 5 MVA & matching with existing gauge and same number of turns including best quality insulation, varnishing by vaccuum impregnation and baking of coil assembly to achieve designed voltage ratio as per manufacturers instruction complete all as specified and directed.

M&L for re-winding LV leg copper coils wire with new tripple paper cover (TPC) as per specifications of copper conductor for transformer of capacity 5 MVA & matching with existing gauge and same number of turns including best quality insulation, varnishing by vaccuum impregnation and baking of coil assembly to achieve designed voltage ratio as per manufacturers instructions complete all as specified and directed.

Supply only transformer oil (Naphthenic) as per IS 12463 (1998), dielectric strength should be upto 60 KV, breaking voltage complete all as specified and directed.

Supply only new HV bushing 33/37.5 KV for transformer of capacity 5 MVA complete all as specified and directed.

Supply only new LV bushing 11 KV for transformer of capacity 5 MVA complete all as specified and directed.

Supply only new LV spindles (metal part) of brass with nuts and washers for 5 MVA transformer complete all as specified and directed.

Supply only new HV spindles (metal part) of brass with nuts and washers for 5 MVA transformer complete all as specified and directed.

Supply only new Silica gel breather unit for 5 MVA transformer complete all as specified and directed.

Supply only new magnetic type oil level gauge for 5 MVA transformer complete all as specified and directed.

Supply only new winding temperature indicator gauge with trip and alarm contacts for 5 MVA transformer complete all as specified and directed.

Supply only new oil temperature indicator gauge with trip and alarm contacts for 5 MVA transformer complete all as specified and directed.

Supply only new drain and filter valve for 5 MVA transformer complete all as specified and directed.

Supply only new double float bucholz relay complete with trip and alarm contacts for 5 MVA transformer complete all as specified and directed.

Supply, installation, testing and commissioning in repair of gang operated air break isolators switch, outdoor type, 18 insulator, double stack, triple pole, rotating type double break per pole, suitable for horizontal mounting consisting of hot dip galvanized channel iron base having 02 Nos, 33 KV post type insulators per stack and 3 such stacks per pole copper or copper alloy high pressure heavily tinned contacts, plated MS arcing horns capable of breaking mangnetising current complete with phase coupling bar 25 mm GI pipe as down rod, lever coupling and operating handle with locking arrangement at for both 'ON' and 'OFF' positions coupling connections etc suitable for 33000 volts, 3 phase, 50 Hz AC supply system having 400 Amp complete all as specified and directed.

Supply & fix in replacement Potential Transformer (PT) of 33 KV Single Phase, outdoor type, PT ratio 33 KV/110VOLT complete all as specified and directed.

Supply & fix in replacement current transformer (CT) of 33 KV Single Phase, outdoor type, CT ratio 200/1 Amps and 100/1 (dual core one for metering and other for protection) having 16 VA burden and class 5P-10 protection complete all as specified and directed.

Supply, installation, testing and commissioning of a set of 3 Nos lightening arrestors, station class Single Pole Non linear resistor type, as per IS 3070 with all fittings, discharge capacity 10 KA, rating 30KV(rms) suitable for 33 KV , grounded neutral link system fixed on channels, cross arms including connecting to over head line and up to earth pit complete all as specified and directed.

M&L for maintenance of 33 KV indoor control and relay panel of 33 KV by checking wiring from outdoor VCB to indoor control panel, tightening of loose connections, U/S indicator with holder, thimble, replacement of unserviceable wiring including testing calibration and checking of tripping system of 33 KV control panel through all protective relays installed on each C&R panel including testing and adjust/ repair the alarm circuit as per time current characteristices by primary injuction test at 60%, 75%, 100% plug including well cleaning and decarbonizing of relay contacts complete all as specified and directed.

S& F in Repair cable end termination 11 KV HT ( Heat shirnkable ) jointing kit for 11 KV (earthed) grade cable for out door type joint complete with jointing material and accessories suitable for 3 core XLPE armoured AL cable of Size 240 sqmm to 300 sqmm complete all as specified and directed.

M&L for Overhauling and servicing of 33 KV VCB including repair and setting of operating mechanism parts, spring charging material mechanism, well cleaning with petrol and CRC-226 and replacing unserviceable parts/ accessories, oiling/ greasing of moving parts, dismantling, checking and well cleaning of pole insulator, checking of vaccum, interupters well cleaning mechanism links fibre reinforced plastic frame around the vaccum interupts including routine and periodical test complete all as specified and directed.

Note : Tenderers may note that amount of credit Rs 11,64,020.00 will be deducted from the total amount arrived, at the time of Acceptance of contract.

R.S ENGINEERING TRADERS

M/S HINA ELECTRICALS