REPAIR, MAINTENANCE OF DISTRIBUTION TRANSFORMER, LT VOLTAGE STIBILZER OF DIFFERENT CAPACITY INCL ALLIED WORK UNDER GE 864 EWS, JOB NO- TPP 2024-25

Amount

Disconnecting defective out door/indoor transformers of following various capacity upto 630 KVA to 750 KVA from HT/LT side, taking out complete transformer oil, storing the same in suitable container (to be arranged by the contractor) opening the top cover and lifting the core assembly by means of tripod and chain pulley block carefully to check its condition, refilling the transformer oil after complete dehydration/filtration if required (to be paid separately) and necessary repairs re fixing complete core assembly and complete core assembly fixing the top cover and re-installation complete all as specified and directed by Engr-in- Charge.

ditto all as per Item No 1 above but distribution transformer of capacity 400 to 500 KVA complete all as specified and directed by Engr-in- Charge.

ditto all as per Item No 1 above but distribution transformer of capacity 250 KVA to 350 KVA complete all as specified and directed by Engr-in- Charge.

ditto all as per Item No 1 above but distribution transformer of capacity 160 KVA TO 200 KVA complete all as specified and directed by Engr-in- Charge.

ditto all as per Item No 1 above but distribution transformer of capacity 63 KVA to 100 KVA complete all as specified and directed by Engr-in- Charge. Note: (For item No 1 to 5) (a) Pole mounted transformer lowering and taking down the same from pole structure to ground carefully if required shall be paid separately under relevant items. (b) In case of major repairs/replacement in transformer which can not be undertake at site the transformer shall be shifted to civil workshop and the cost shall be paid separately under relevant items (c) Cost of dehydration/filtration and other necessary repairs shall be measured and paid separately under relevant item (d) Contractor shall bring the mechanic at site for first inspection of the transformer after that transformer shall be shifted to civil workshop

Dismantling and taking down out door transformer from two pole /four pole/hard standing structure lowering the same carefully by means of chain pulley block and all other required T&P and re-installation after repairs complete all as specified and directed by Engr-in- Charge.

Material & labour for rewinding (for ser No 01 to 05 for six Nos transformers and voltage stablizers in ser NO 29 to 32, if required while repairing) of LT side winding with copper wire/strip matching with existing size/ gauge, fixing the coil in position in core assembly and making connection as per existing pattern including providing insulation, varnish complete all as specified and directed by Engr-in-charge.

Material & labour for rewinding (for ser No 01 to 05 for six Nos transformers if required while repairing) of HT side coil with supper enamelled Copper wire/strip matching with existing size/ gauge, fixing the coil in position in core assembly and making connection as per existing pattern including providing insulation, varnish complete all as specified and directed by Engr-in- Charge. Note - 1. The cost of coil shall be inclusive of varnish sleeve and insulating material etc no extra payment shall be made for the same . 2. Actual weight of wire (used for rewinding) will be measured and paid for each transformer mentioned above.

Renewal of cracked/worn out synthetic rubberized cork gasket 6mm thick for HT/LT bushes of various size etc complete all as specified and directed by Engr-in- Charge.

M &L for painting the outer surface of the transformer / Servo Voltage stabilizer with two coats of synthetic enamelled paint after preparing the surface dust and oil free and cleaning the bushes, name plate etc paint free after painting including writing MES/ SM No with enamelled paint for fransformer of rating 50 KVA to 630 KVA (Indoor/ outdoor type) complete all as specified and directed by Engr-in- Charge.

Supply and renewal of silica gel only with fresh blue coloured complete all as specified and directed by Engr-in- Charge.

Supply and fixing in renewal Tap changer switch suitable for Transformer 63 KVA to 200 KVA complete all as specified and directed by Engr-in- Charge.

Supply and fixing in renewal Tap changer switch suitable for Transformer of capacity 250 KVA to 630 KVA complete all as specified and directed by Engr-in- Charge.

Supply and renewal HT/LT side cable box cover plate made out of MS sheet of 16 SWG complete with nuts, bolts washers suitable for indoor / outdoor type transformer of capacity 63 KVA to 400 KVA complete all as specified and directed by Engr-in- Charge.

M&L for renewal of HT 11 KV bush insulator suitable for distribution transformer of any type and of size upto 200 KVA complete all as specified and directed by Engr-in- Charge.

M&L for renewal of HT 11 KV bush insulator suitable for distribution transformer of any type and capacity 250 KVA to 630 KVA complete all as specified and directed by Engr-in- Charge.

M&L for renewal of LT bush insulator suitable for distribution transformer of any type and of size upto 200 KVA complete all as specified and directed by Engr-in- Charge.

M&L for renewal of LT bush insulator suitable for distribution transformer of any type and capacity 250 KVA to 630 KVA complete all as specified and directed by Engr-in- Charge.

M&L for renewal of HT bush rod made out of brass with nut bolt and washer suitable for distribution transformer of any type and of size upto 200 KVA complete all as specified and directed by Engr-in- Charge.

M&L for renewal of HT bush rod made out of brass with nut bolt and washer suitable for distribution transformer of any type and capacity 250 KVA to 630 KVA complete all as specified and directed by Engr-in- Charge.

M&L for renewal of LT bush rod made out of brass with nut bolt, rubber packing and washer suitable for distribution transformer of any type and of size upto 200 KVA complete all as specified and directed by Engr-in- Charge.

M&L for renewal of LT bush rod made out of brass with nut bolt, rubber packing and washer suitable for distribution transformer of any type and capacity 250 KVA to 630 KVA complete all as specified and directed by Engr-in- Charge.

M&L for renewal of transformer oil for topping up or for replacement in burnt Transformers oil / Servo voltage stabilizer complete all as specified and directed by Engr-in- Charge. Note: Oil shall be in company sealed barrel having BDV not less than 40KV and Transformer oil topping up or replacement should be done on existing installation place on same days)

Material & labour cleaning sprarked/old transformer oil and all other foreign materials from external surface of transformer of capacity 63 to 315 KVA (incl voltage stablizer of different capacity) and preparing the surface to paint the transformer body one coat of synthetic enamel while paint, including writing MES No & SM No withsmooth gray paint on back base incl replacement of outlived silica gel with new silica gel ‘A’ grade complete for transformer of capacity 63 to 315 KVA complete all as specified and directed by Engr-in- Charge. Note: Transformer oil filteration & dehyration by Ultra High Vaccum double stage machine should be done on existing installation place on same days and report of the same be obtained from the vendor).

Material & labour cleaning sprarked/old transformer oil and all other foreign materials from external surface of transformer of capacity 350 to 750 KVA and preparing the surface to paint the transformer body one coat of synthetic enamel while paint, including writing MES No & SM No withsmooth gray paint on back base incl replacement of outlived silica gel with new silica gel ‘A’ grade complete for transformer of capacity 350 to 750 KVA complete all as specified and directed by Engr-in- Charge. Note: Transformer oil filteration & dehyration by Ultra High Vaccum double stage machine should be done on existing installation place on same days and report of the same be obtained from the vendor).

M&L for GI strip of size 32x6mm as earth continuity conductor burried in ground or drawn in pipe or fixed to wall on saddle complete all as specified and directed by Engr-in- Charge.

M&L for fixing GI funnel complete with wire mesh for earthing water pipe complete all as specified and directed by Engr-in- Charge.

M&L for each pit cover of size 300X300X40mm thick of RCC M-15 (Nominal mix) using 20mm graded stone aggregate with MS TMT reinforcement bar of 8mm dia @ 150mm centre to centre both ways, MS handle 10mm dia made to shape complete all as specified and directed by Engr-in- Charge.

Disconnecting HT/LT cable/ busbar and earthing connetions of Servo voltage stabilizer of capacity 400 KVA, 3 phase from floor with the help of Crane to carry out overhaulling of servo voltage stabilizer comprising of the following:- (i) Draining out oil from chamber. (ii) Opening top cover, disconnecting winding connection from bushing and taking out carefully core assembly complete with winding. (iii) Checking compactness of core & tighening the same where required. (iv) Chemical washing of winding to remove dirt, dust & carbon particles. (v) Cleaning of oil tank to remove oil sludge followed by painting of inner surface to tank with zinc chromate base paint. (vi) Refixing of core & winding assembly and making connection with HT/LT bushing. (vii) Replacement of worn out gaskets & nut/ bolts. (viii) Refilling of oil duly filtered/ dehydrated/ fresh oil( to be measured & paid separately under respective items). (Note: Overhauling of Servo voltage Stabilizer shall be done on existing installation place on same day).

ditto all as per Item No 29 above but capacity 200 to300 KVA complete all as specified and directed by Engr-in- Charge.

ditto all as per Item No 29 above but capacotu 75 to 100 KVA complete all as specified and directed by Engr-in- Charge.

ditto all as per Item No 29 above but capacotu 25 to 50 KVA complete all as specified and directed by Engr-in- Charge.

Supply and installation of MC TRMS PCB suitable for voltage stablizer of capacity 25 to 400 KVA complete all as specified and directed by Engr-in- Charge.

Supply and installation of Contactor 100 Amp, suitable for 25 to 100 KVA voltage stablizer 3 Phase complete all as specified and directed by Engr-in- Charge.

Supply and installation upto 2 Kg motor sync suitable for 25 to 75 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and install 3Kg motor sync suitable for upto 100 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation upto 3 Kg motor sync suitable for upto 100 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation 10Kg motor sync suitable for upto 200 to 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation RC suitable for 25 to 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation Carbon bush suitable for 25 to 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation dimmer coil as per existing size suitable for 25 to 50 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation dimmer coil as per existing size suitable for 75 to 100 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation dimmer coil as per existing size suitable for 200 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation dimmer coil as per existing size suitable for 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation closer sheet suitable for 25 to 400 KVA voltage stablizer as per existing size complete all as specified and directed by Engr-in- Charge.

Supply and installation 20kg motor sync suitable for 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation of Carbon roller assy suitable for 25 to 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation of Tag & Tail assy as per sample suitable for 25 to 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation of PCB Relay as per existing sample suitable for 25 to 30 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation of PCB Relay suitable for 50 to 75 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation of PCB Relay suitable for 100 to 200 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation of PCB Relay suitable for 220 to 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation of flip flop suitable for 25 to 400 KVA voltage stablizer as per existing sample complete all as specified and directed by Engr-in- Charge.

Supply and installation of Time delay relay suitable for 25 to 400 KVA voltage stablizer as per existing sample complete all as specified and directed by Engr-in- Charge.

Supply and installation of limit switch (B4C) suitable for 25 to 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation of power contactor suitable for 25 to 400 KVA as per existing sample complete all as specified and directed by Engr-in- Charge.

Supply and installation of Aux contactor 4 Nos + 4NC 44W, 230V AC complete suitable for 30 to 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge.

Supply and installation of Aux contactor 6 Nos +2NC 62W, 110V AC complete suitable for 30 to 400 KVA voltage stablizer complete all as specified and directed by Engr-in- Charge. Note: Contractor shall be renew the accessories of voltage stabilizer item No 33 to 48 by the authorised service Engineer only.

M&L for post and struts in fancing including cutting tops to shape airected drilling holes notching for wire etc. flat iron filets (for securing wire mesh etc.) including all necessary drilling bolting or riveting etc. and simillar work confirming to Fe-290 Gde E-165ramed work in repair such as grills gratings etc with ends of bas shouldered and or riveted, or forged into spikes, framed guard bars, barred iron doors, ladders, framed balusters walk ways, railig, frame work of water tanks and similar work conforming to Fe.290. Gde E-165 complete all as specified and directed by Engr-in- Charge.

M&L for mild steel tie bars with screwed ends, nuts, washers and mild steel plates for walls, chimney, roofs ,arches etc. king rods and straining bolts confirming to Fe-290 Gde E-165 complete all as specified and directed by Engr-in- Charge.

M&L in of Chain fencing with 4 mm dia galvanised steel wire, 150 x 100 mm mesh, made up into mattresses or cages, lapped, wired and laid in position, including closing after filling complete all as specified and directed by Engr-in- Charge.

M&L for Excavation in post holes or similar holes each not exc 0.5 cum, getting out, retruning filling in and ramming earth or brocken rubble mixed with earth around, in layers not exceeding 25 cm complete all as specified and directed by Engr-in- Charge.

M&L for Plain cement concrete, (1:2:4) type B-2 using 40 mm graded stone aggregates as in foundation, filling, mass concrete and copings and the like including necessary form work complete all as specified and directed by Engr-in- Charge.

Demolation of cement concrete in any description and in any position not otherwise specifically provied for complete all as specified and directed by Engr-in- Charge.

M&L for Earthing complete with galvanised steel earth plate electrode 60cmX60CmX6.0mm thick, buried directly in ground (earth pit not less than 2.25 mtr deep below normal ground level) with top edge of the plate not than 1.5 mtr below normal ground level connected to GI earth strip of size 32X6mm by means of bolts nuts, check nuts and washers of galvanised iron complete earth pit of PCC M-10 (Normal mix) using 20mm graded stone aggregate, 50mm thick earth pit cover of RCC M-15 (Normal mix) using 20mm graded stone aggregate with MS TMT reinforcement bar of 8mm dia @ 150mm centre to centre both ways, MS handle 10mm dia made to shape, GI funnel, wire mesh and 20mm bore GI water pipe medium grade and 40mm bore medium grade GI pipe for protection of earth strip from plate to main switch board, common salt, charcoal dust including testing on completion complete all as specified and as directed all as shown in electrical plate No 3 including testing on completion and making good the disturbed surface of wall floors etc without claiming extra cost complete all as specified and directed by Engr-in- Charge. (Note: GI strip & GI pipe beyond 7.5 Mtr length form earth electrode shall be measured and paid separately).

M/S Sky Engineers (BID ID -3120926)

M/S Khan Hussain & Co. (BID ID -3116806)

M/s Habib Electronics (BID ID -3118517)