REPAIRS/MAINTENANCE OF HT POWER/DISTRIBUTION TRANSFORMERS, HT CONTROL PANEL, SWITCH GEARS AND CONNECTED WORKS INSTALLED AT DRDL/ASL AREA UNDER GE (I) RND KANCHANBAGH, HYDERABAD

Amount

Disconnecting electrically and mechanically indoor/outdoor type transformers indoor/ outdoor upto 2500 KVA capacity, carefully to carry out any type of repairs complete all as specified and directed. Note : Crane charges required shall deemed to be included in the quoted rate.

M&L for draining out complete transformers oil from the transformers upto 800 KVA capacity at site which found major repair and storing the oil in suitable container (container to be provided by the contractor to keep aside for re -use (after repair) and lifting of core assembly by opening of top cover and other items for checking of faults/repair and lowering / refixing the same in its original position after inspection to make it ready for transportation to carry out rewinding work in workshop including transportation of unservicieable transformer upto 800 KVA capacity to workshop (rate is deemed to be inclusive of transportation , T&P and man power, crane charges ) complete all as specified and directed. Note : The copper conductor required for rewinding will be measured & paid as S&F under Sch 'A' item.

All as per item No. 02 above, but for transformer capacity 1000 to 2500 KVA.

Material & Labour for rewinding using rectangular copper conductor of size and thickness as per the OEM specification to obtain the rated impedance values and KVA rating as specified by the OEM for various transformer capacities step down 11/0.433 KV for making HV/LV coils including the class 'A' insulation paper, IEC standard, high density laminated board confirming IEC 60763 of required thickness and all minor spares/material required to complete the job all as specified and directed.

Disconnecting and removing of the unserviceable silica gel breather supply and fixing new silica gel breather with silica gel for, vent pipe for following capacities of transformers indoor/out door type as per existing model and size all as directed.

Up to 500 KVA transformer

630 KVA to 2500 KVA transformer Make:- ETE/SUPER FAB

Supplying and fixing in replacement, Porcelain Transformer bushing on HT (11 KV) side, including brass stems conical bush and gasket after disconnecting electrically and mechanically for indoor/outdoor transformer of capacity upto 500 KVA and connecting electrically and mechanically, testing complete all as specified and directed. Note.The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transformer oil, opening of top cover by unscrewing nut, bolts washers and connections.

All as per item No. 06 above, but for transformer capacity 630 to 2500 KVA.

Dehydration and filtration of transformer oil in transformers/OCB of indoor/outdoor/ isolation transformers at different location with centrifusing machine electrically operated and achieve die electric strength 60 KV removal of moisture upto <5-10ppm, gas content < 0.1% including carrying out oil testing before and after the dehydration process for each transformer complete all as specified and directed. Note : (i) Transformer oil for topping up will be mesured and paid separately under relevant item of schedule.

Supply and topping up of new transformer oil as per IS :335, die electric strength not less than 60 KV with the help of Filtration plant complete all as specified and directed. Make :- Power Oil/Electrol

Supplying and fixing in replacement, Porcelain/Epoxy Transformer bushing on LT (440 Volt) side, including brass stems conical bush and gasket after disconnecting electrically and mechanically for indoor/outdoor transformer of capacity upto 160 KVA and re-connecting electrically and mechanically, testing complete all as specified and directed. Note.The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transformer oil, opening of top cover by unscrewing nut, bolts washers andreplacing damaged pad type alluminium bar for connecting cables of appropriate size / capacities of transformers with brass nut bolt & washers.

All as per item No. 10 above, but for transformer capacity 630 to 800 KVA.

All as per item No. 10 above, but for transformer capacity 1000 to 2500 KVA.

Supply and fixing in replacement LT terminals of any type/model made out of brass with nuts and washers etc as per existing size and shape complete after removing the unserviceable studs after disconnecting electrillay & meachanically for indoor/out door transformer & reconnecting electrially and meachanically, testing complete for following capacity of transformer all as specified and directed. Note.The rates quoted is deemed to be included the cost of necessary labour charges for draining out & re-filling transforer oil, opening of top cover by unscrewing nut, bolts washers and provision of pad type bus bar almuminium of approppiate size /capacities of transformers with nut bolt & washers.

Up to 400 KVA

500 to 750 KVA

1000 to 5000 KVA

Disconnecting the transformer of any capacity and any make, out door/indoor type from platform / two pole structure by opening HT/LT side connection, earth connections etc and shifting it to another location by crane and putting it in proper position including connecting all collections on HT/LT side and earthing strip to neutral and body and testing complete all as specified and directed. Note:- This work shall be carried out as and when required during break downs.

Opening top cover of transformer decanning of complete transformer oil and keeping it in cleaning and dry container taking out complete core with windings and segregating of HT/LT leg coils, dismantling and reassembling of core after thorough cleaning including assembling and jointing connection HT/LT coil in core complete with all making new star delta connection proper alignment including keeping owen chamber of 100 degree C. temperature to remove the moisture fixing of upper yoke lamination checking tightening of nuts, bolts etc and making good any deficient item testing and putting inside transformer tank after duly cleaning with suitable cleaning media filling of transformer oil closing the top cover properly and testing for capacity up to 400 KVA, 11/0.433 KV complete all as specified and directed.

All as per item No. 15 above, but for capacity 500 to 800 KVA.

All as per item No. 15 above, but for capacity 1000 to 2500 KVA.

Supply and filling Dry sand for cushioning in substatins / cables in trenches including spreading, levelling, hand punning complete all as specified and directed.

Material and labour for spray painting of transformer in its position for at workshop after preparing the surfaces, aka removing rust, grease old paint coating on any other surfaces and spray painting with two coats of synthetic enamel paint (grey color) with smooth finish surfaces of transformers 11/0.433 KV of following capacities all as specified and directed. Make of paint : Asian/Nerolac/Berger Benz

400 KVA to 500 KVA

630 KVA to 750 KVA

1000 KVA to 2500 KVA

Earthing complete with copper plate electrode 600x 600x 3 mm thick buried directly in ground vertically to a depth not less than 2.25 mtr deep below normal ground level with top edge of earth plate, not less than 1.5 mtr below normal ground level connected to copper strip earth lead of size 20 x 3 mm by means of bolts, nuts/check nuts and washers etc of galvanised iron, protected by galvanised iron pipe light grade 40 mm dia upto a length of 4 mtr away from earth electrode and connected to main switch/control board including necessary excavation earth work in any type of soil and PCC 1:3:6 type C1 for earth chamber, 40 mm thick RCC cover slab 1:2:4 type B1 with 6 mm dia TMT Bars at 140 mm cc both ways, watering pipe 20 mm dia light grade GI, funnel, wire mesh, lugs, charcoal and salt etc complete all as shown in Electrical plate No. 3 SSR Part I and testing complete including removing unserviceable any type of items all as specified and directed.

Material and labour for Earthing complete with galvanised steel earth plate electrode 600 x 600 x 6 mm thick buried directly in ground vertically to a depth of not less than 2.25 mtrs below ground level with the top edge of earth plate at a depth of not less than 1.5 mtrs below normal ground level, connected to and including galvanised iron earth strip of size 32x6 mm with GI medium grade protection pipe of 40 mm dia for earth electrode upto test point or upto 7.5 mtr whichever is less, by means bolts, nuts, check nuts and washers of galvanised iron including necessary excavation earth work in any type of soil, PCC pit (1:3:6) type C1 and RCC cover (1:2:4) type B1 of 40 mm, watering pipe 20 mm dia GI pipe, wire mesh, funnel, lugs, charcoal, salt etc complete all as per electrical plate No. 3 or SSR Part-I complete all as specified and directed. Note : GI strip and GI pipe 40 mm dia beyond 7.5 metres per earth will be measured and paid separately.

Supply and Fix galvanised iron strip of size 32x6 mm burried in ground/on wall as earth continuity conductor and all as specified and directed.

Supply, Fix and connect earth continuity conductor of copper strip size 20 x 3 mm on wall/trench/floor etc., and through GI pipe complete all as specified and directed.

Supply and Fix GI tubing 40 mm dia light grade for protection of earth conductor and all as specified and directed. Make : Jindal/Prakash/Oswal

Material and labour for XLPE cable end termination joint, out door cold shrinkable type of 11 KV (earthed) grade cable, 3 core, 50 to 95 sqmm complete with jointing material and accessories including removing the unserviceable joint all as specified and directed.

All as per item No. 25 above but size 3 core, 120 to 185 sqmm complete all as specified and directed.

All as per item No. 25 above but size 3 core, 240 to 300 sqmm complete all as specified and directed.

Cable jointing kit for 11 KV (Earthed) grade cable for straight through cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 to 95 sqmm complete all as specified and directed.

All as per item No. 28 above but cold shrink type of size 120sqmm to 185 sqmm

All as per item No. 28 above but cold shrink type of size 240 sqmm to 400 sqmm Make : 3M/Raychem/Cabseal/Denson

Supplying and Fixing ACB with Microprocessor release IPR (4Pole) inbuilt O/L, S/C & EF protection of the following capacities fixed in existing panel boards including cable connections,aluminium lugs, glands and testing complete :-

ACB 1250Amps, 415V, 50KA, 4 pole, draw out type with advanced self protection controls, LCD screen display, communication ready confirming IS/IEC 690947-2 of frame size suitable to the existing panel complete all as specified and directed.

ACB 800Amps, 415V, 50KA, 4 pole, draw out type with advanced self protection controls, LCD screen display, communication confirming IS/IEC 60947-2 of frame size suitable to the existing panel complete all as specified and directed. Make for Item No: 32 & 33 :- Legrand /DMX3/Siemens/ L&T/ ABB

Material & Labour for GI tubing 100 mm dia light grade galvanised for cable protection including sealing both ends including removing old unserviceable item all as specified & directed.

All as per item No. 34 above, but 80 mm dia. Make for Item No: 34 & 35 :- Jindal/Prakash/Oswal

Supply, lay, test and commissioning of XLPE insulated HT cable, screened PVC bedded, galvanised steel strip or wire armoured electric power cable of 6350 (UE) / 11000 (E) volts grade with multistranded aluminium conductor of cross sectional area 150 sqmm; 3 core to be laid in trenches fixed along the poles bare or through pipes complete and removing the unserviceable cable all as specified and directed. Note : Excavation and earth work / san / cable covers will be measured and paid seperately.

Supply and laying un reinforced precase concrete cable cover, class HV, type 1, flat size 300 x 180 x 40 mm for protection of HT cable including taking down unserviceable cable cover complete all as specified and directed.

Dismantling and taking out the existing 11 Mtr long 4 pole structure along with connected GOD, MS channels, lightning arrestor and connected items from site safely without any damage to the poles and shifting to desired location and re-installation the same including cross arms, equal angels using necessary nuts, bolts, washers & clamps, gang operated switch (GOD), drop out fuse, Jumphers etc., included in quoted rate complete all as specified and directed. Note : Earth work and PCC required for installation and paid separetely under relevant item.

Material and labour for PCC 1:3:6 type C2 wiring 40mm stone aggregate for foundation of poles/tranformer bed/cable duct foundation/panel base/chain link supports etc including necessayr form work etc complete all as specified and directed.

Material and labour for PCC 1:2:4 type B1 wiring 20 mm graded stone aggregate for coping of pole including necessary form work etc complete all as specified and directed.

Excavation in trenches not exc.1.5 Mtr in width and not exceeding 1.5 Mtr in depth getting out in hard/dense soil

Removing excavated surplus soil material not exceeding 50 Mtr and depositing where directed at a level not exceeding 1.5 Mtr above the starting point all as specified.

Returning, filling, including spreading, levelling, watering and well ramming in layer not exceeding 25 cm thick.

Material and Labour for cutting existing BT road/PCC of size 45cm x 60cm for taking out/laying of underground cable and including necessary earth work and refilling the same in layers well ramming including watering as required and matching with the existing surface with 200mm thick PCC 1:2:4 type B1 and curing the same with wet gunny bags and removing debris to a distance not less than 50m complete all as specified and directed

Supply, install, test and commissioning LT Panel board, factory made cubical type, indoor type main frame made out of 2.0 mm thick CRCA sheet totally enclosed eppoxy power coating of RAL-7032 (Simens grey) of min 80 microns mat finish after seven tanks treatment process. The panel shall be fabricated by CPRI certified manufacturer duly providing necessary ventilations, weather, dust and vermin proof suitable for working 415volts, 3 phase, 50 Hz having aluminium bus bars of capacity 630Amps and half neutral duly colour coaded sleeves and supported with DMS/SMC insulators complete with Digital type multifuntion meter V,A KVA, KVAR, PF, KWAH with class 1 accuracy including CL-1, 15 VA CTs of ratings as per the busbar rating: ASS< VSS, set of three LED phase indicating lamps duly prewired with FRLS standard copper conductor of not less than 1.5Sqmm and the panel should be mounted on 'C' channel base ISMC 75 frame duly painted with anti corrosive paint. The doors should be provided with nitrile rubber gaskets and the rating of switch gears to be provided on each compartment. The panel board shall be suitable to accommodate and including cost of the following switch gear items including removing unserviceable panel from its location and necessary PCC foundation as required at site for mounting the panel complete all as specified and directed:- Make of switch gears: LEGRAND/L&T/SIEMENS/ABB

(a) MCCB 400 Amps, 4 pole, 36 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles - 01 No. (I/C) (b) MCCB 200 Amps, 4 pole, 25 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles - 02 Nos. (out going) (c) MCCB 100 Amps, 4 pole, 25 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles - 03 Nos. (out going) (d) MCCB 63 Amps, 4 pole, 25 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles- 02 Nos. (out going)

All as per item No. 45 above but out door type main frame made out of 3.15 mm thick CRCA sheet with aluminium bus bar of capacity 1000 Amps, including fixing of the following items :-

(a) MCCB 630 Amps, 4 pole, 50 KA Icu=100% microprocessor release type - 01 No. (I/C) (b) MCCB 200 Amps, 4 pole, 25 KA, Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles - 03 Nos. (out going) (c) MCCB 63 Amps, 4 pole, 16 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles - 04 Nos. (out going) (d) MCCB 32 Amps, 4 pole, 16 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles- 03 Nos. (out going)

All as per item No. 45 above but out door type made out of 3.15 mm thick CRCA sheet with aluminium bus bar of capacity 630 Amps, including fixing of the following items :- Make for item No. 45 to 47 : MCCB : - L&T/Legrand/Siemens

(a) MCCB 400 Amps, 4 pole, 36 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles - 01 No. (I/C) (b) MCCB 320 Amps, 4 pole, 36 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles - 01 No. (out going) (c) MCCB 200 Amps, 4 pole, 25 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles - 02 Nos. (out going) (d) MCCB 100 Amps, 4 pole, 16 KA Icu=100% Ics thermal magnetic adjustable over load and short circuit protections with necessary rotary handles- 03 Nos. (out going)

Supply, fix, testing and comminisioning and programming in repairs of Transformer Protection relay MICOM P642 in existing HT panel board including programming & connecting all the control cables & testing to the entire satisfection of Engr-in-Charge.

M/S GDR CONSTRUCTIONS

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