Supply, Dismantling, Rewinding, Testing and Commissioning of 04 nos. 11kV / 0.415 kV ONAN existing transformers with necessary Disconnection, and Re-Termination as per enclosed Tender specification, at TIFR, Colaba

Part A: Disconnection, Rewinding, Testing of 04 no’s Transformer work

Dismantling, Disconnection of below mention transformer HT and LT cable / busbars from terminals box / from disconnection chamber. Disconnection of control cable, neutral and body earthing etc. As per mention in technical specification. (Cost to be including of removing, shifting and Re-fixing all existing detachable accessories of the transformer like radiators, Explosion vent, etc. If required for this job.

1000 KVA 11/0.400 KV transformers no

(TR O1, TR 02, TR 06)

Draining out of oil from the transformer tank, and Re-filling of the oil with filtration and BDV testing after shifting of rewound transformer at TIFR site, (Contractor shall be provided Clean Drums for storage during oil draining, refilling work. After completion of said works the contractor shall be taken back the empty drums, Transformer maximum oil tank capacity is 1150 Liters).

Loading and unloading and Transportation (TO and FRO) of transformers by suitable vehicle with transit insurance from TIFR premises to Vender’s premises for rewinding and return from vender premises to TIFR premises after rewinding by using manual labour, a suitable capacity Hydra crane, and lifting slings in a safe manner. (Cost to be including manual labour, Hydra crane and Transit Insurance etc.)

1000 KVA 11/0.400 KV transformers no. (TR 01, TR 02, TR 04)

1500 KVA 11/0.433 KV transformer no (TR 06)

Remove the old copper HV & LV winding from the transformer. Supply and Rewind transformer with new electrolyte-grade (99.2% pure) copper winding insulated with electrical-grade insulating Kraft paper. The old winding will be retained by the vendor, and the buy-back price of the old winding will be set off while quoting the price of rewinding. (Rewind transformer as per parameter mention on the name plate of the transformer and point no 05 mention in technical specification) Note: Internal panting, external panting, and RC 80 gaskets, SS 304 nut bots etc. prices include while quoting the price of rewinding

1000 KVA 11/0.400 KV transformers no. (TR 01, TR 02, TR 04)

1500 KVA 11/0.433 KV transformer no (TR 06)

Supply and install new HV/LV/NG busing as per requirement if found worn-out/ damage for below mention transformers.

1000 KVA 11/0.400 KV transformers No. (TR 01, TR 02, TR 04)

1500 KVA 11/0.433 KV transformer no (TR 06)

Supply and install new HV/LV/NG metal part as per requirement if found worn-out/ damage for below mention transformers.

1000 KVA 11/0.400 KV transformers No. (TR 01, TR 02, TR 04)

1500 KVA 11/0.433 KV transformer no (TR 06)

Testing of the transformer after rewinding at vender premises and after re wound transformer installed at TIFR premises on off load and on load for all the routine tests as per IS 2026 and mentioned in the technical specification

Heat Run test of transformers shall be carried out on 80% load for rewound transformer at vender in house testing facility. As per IS 2026 temperature stabilization and instruction of engineer in charge for below mention transformers.

1000 KVA 11/0.400 KV transformers no. (TR 01, TR 02, TR 04)

1500 KVA 11/0.433 KV transformer no (TR 06)

Supply and install new marshalling box for transformer after dismantle old marshalling box for below mention transformers.

1000 KVA 11/0.400 KV transformers no. (TR 01, TR 02, TR 04)

1500 KVA 11/0.433 KV transformer no (TR 06)

Supply and install New GOR1 Buchholz relay for below mention transformers. Change connecting pipe between Buchholz relay to main tank and Buchholz relay to conservator tank.

1000 KVA 11/0.400 KV transformers no. (TR 01, TR 02, TR 04)

1500 KVA 11/0.433 KV transformer no (TR 06)

Supply and install new OTI and WTI in marshalling box and do the connection with all accessories including sensors and cables suitable for below mention transformers

1000 KVA 11/0.400 KV Transformers no. (TR 01,TR 02 TR04)

1500 KVA 11/0.433 KV Transformer no (TR 06)

Supply, install transformer HT/ LT cable termination metal box as per site requirement and as per IS standard for below mention transformers.

1000 KVA 11/0.400 KV transformers no. (TR 01, TR 02, TR 04)

1500 KVA 11/0.433 KV transformer no (TR 06)

Supply and install new Tap changer switch as per requirement if worn-out/damage for below mention transformers.

1000 KVA 11/0.400 KV transformers no. (TR 01, TR 02, TR 04)

1500 KVA 11/0.433 KV transformer no (TR 06)

Supply and install new radiators of 300 x1100 x 15 fins along with pair of baffle valves for 1500 KVA 11/0.415 KV transformer no. TR 06 As per existing design and guidance of engineer in charge.

Supply of Transformer oil as per IS 335 in Sealed drum of 209 litres Each Make: Savita / Apar

Part B : 1000 KVA 11/0.415 KV temporary transformer on Rental basis Transformers /TIFR stand by transformer.

Supply temporary transformer on rental basis Transformer of 1000 KVA 11/0.415 KV 01 nos. for uninterrupted supply in TIFR premises.as per site condition and requirements

Installation and commissioning of 1000 KVA 11/0.415 KV rental basis transformer OR 750 KVA 6.6 / 0.415 KV TIFR stand by transformer include disconnection and Re termination of transformer HT/LT cable termination that it can be used in place of all the four above mentioned transformers every time a transformer is removed for rewinding. HT termination of the transformer will be done one time. LT cables of the transformer will be of suitable length so that they can be connected to all the existing LT cables/switch gear panel of the all above-mentioned 04 nos. transformers one by one. The contractor shall submit the required application, drawings etc. to the CEA, BEST CPWD AND ANY OTHER AUTHORITIES s and obtain their approved licenses and / or sanctions for erection of transformer and the liasoning work cost shall be include in this item.

Loading and unloading and Transportation (TO and FRO) of 1000 KVA 11/0.415 KV without OLTC rental basis transformers by suitable vehicle with transit insurance from Vender’s premises to TIFR premises for temporary supply and return from TIFR premises to vender premises after complete all work by using manual labour, a suitable capacity Hydra crane, and lifting slings in a safe manner. (Cost to be including manual labour, Hydra crane and Transit Insurance etc.)

Part C : CABLE SUPPLY, LAYING AND TERMINATION DETAILS OF ABOVE MENTION WORK

Supply of electrolytic grade (99.92%) Copper Strips of 50 x05 mm required for earthing Of Rental transformer

Laying, installation and termination of electrolytic grade (99.92%) Copper Strips of 50 x05 mm required for transformer temporary earthing connection with proper saddles /ties on the existing walls/ceiling/ false ceiling /existing trench/shaft with proper support for transformer from nearest earthing junction of old transformer which is taken out for rewinding with proper nuts and bolts for each transformer.

Supply of HT and LT XLPE insulated, and overall sheathed, stranded aluminium conductor, flat steel strip/wire armoured cable conforming to IS:7098 Part – 2 (with latest amendments) and the cable shall be ISI certified mark as mention below

3 C x 185 sq.mm Aluminium Armoured XLPE (11 KV grade HT Cable)

4 C x 185 sq.mm Aluminium Armoured XLPE ( 1.1 KV grade LT Cable)

Laying of HT and LT XLPE, aluminium armoured cable on the existing walls/ceiling/ false ceiling /existing trench/shaft/ existing cable Trunking with GI saddles (all incidental civil work is in vendor scope). Note: Cable laying will involve multiple runs as per the direction of the Engineer in-charge.

3 C x 185 sq.mm Aluminium Armoured XLPE (11 KV grade HT Cable)

4 C x 185 sq.mm Aluminium Armoured XLPE ( 1.1 KV grade LT Cable)

Glanding and Termination of HT and LT XLPE, aluminium armoured cable Through Heavy Duty brass gland and Heavy-duty Lugs completes with cable size marker and dressing of cable in cable trenches, reroute of cable etc. (supply of gland, heavy duty lugs and all other accessories required for cable termination is in vendor’ scope)

3 C x 185 sq.mm Aluminium Armoured XLPE (11 KV grade HT Cable)

4 C x 185 sq.mm Aluminium Armoured XLPE (1.1 KV grade LT Cable)

Re-arranging and Re-Termination of HT and LT XLPE/ PVC old existing aluminium conductor armoured cable to the rewound transformer termination box Through Heavy Duty brass gland and Heavy-duty Lugs completes with cable size marker and dressing of cable in cable trenches, reroute of cable etc. (supply of gland, heavy duty lugs and all other accessors required for cable termination in vendor scope).

LT 185 sq.mm 1.1 KV, 4 core, XLPE/ PVC old existing aluminium conductor armoured cable

HT 185 sq.mm 11 KV, 3 core, XLPE /PVC old existing aluminium conductor armoured cable

Re-arranging and Re-Termination of existing 4 nos.LT copper Busbars set to the rewound transformer (TR 06) termination box through proper Nuts and Bolts as per requirement for termination.

Provides MS channel support for both LT and HT terminal boxes intact with old cable with supply, fabrication and install MS channel frame as per site requirement and as per instruction from engineer in charge.

After complete work for all transformers, disconnect, removed and shift all temporary HV and LV cables, earthing strips etc. Laid for temporary connection of transformers in institute premise and shift in institute premises cable yard as per instruction from engineer in charge.

After complete rewinding work removed dead old paper insulated HT/LT cable from transformer bay, HT/LT switchgear, cable trench and shift in institute premises cable yard as per instruction from engineer in charge.

Telawne Cromptek Electricals Pvt. Ltd.