REPAIR AND MAINTENANCE OF TRANSFORMERS, RMU, BATTERY CHARGER,FEEDER PILLAR WITH CONNECTED ITEMS AT KABUL LINE, BAIRD PLACE, KOTWALI LINE, CEDZ OFFICE, AREA ACCOUNT AND ASSOCIATED AREA UNDER AGE SLDC E/S UNDER GE (U) ELECT SUPPLY DELHI CANTT-10

Amount

Disconnecting electrically and mechanically outdoor transformers upto 630 KVA capacity, lowering down from 4/6 pole structure carefully for major/minor repairs complete all as specified and directed.

Disconnecting electrically and mechanically indoor/outdoor transformers inside the substation or outdoor type on outside plinth upto 630 KVA capacity, carefully for major/minor repairs complete all as specified and directed.

M&L 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 630 KVA capacity to workshop ( rate is deemed to be inclusive of transportation , T&P and men power ) complete all as specified and directed.

M&L for transportation of transformer of capacity upto 400/315 KVA from MES Yard to site location using Hydra/Crane and truck as per requirement to replace defective transformer including installation, testing and connecting at site and to deposit the same to MES Yard after receipt and installation of repaired transformer at site complete all as specified and directed. Note:- Contractor must arrange for transportation and installation for replacement of transformer at site immediately after receipt of verbal/telephonic/written complaint from JE/Engr-in-Charge within 1 day. Any delay beyond 1 day post receipt of complaint shall be penalized @ Rs 2500/- per day and shall be recovered from next due RAR.

M&L for alternative arrangement by hiring, transportation of transformer of capacity 500 / 630 KVA in place of unserviceable transformer on hire basis for 15 days including, installation, connecting and testing of transformer and return back after installation of repaired transformer complete all as specified and directed. Notes:- (i) Contractor must arrange hired transformer including transportation and installation at site immediately after receipt of verbal/telephonic/written complaint from JE/Engr-in-Charge within 1 day. Any delay beyond 1 day post receipt of complaint shall be penalized @ Rs 3500/- per day and shall be recovered from next due RAR. (ii) Repairing of transformer must be completed within 15 days after receipt of verbal/ telephonic/ written complaint from JE/Engr-in-Charge. In case of any delay, no extra claim will be entertained towards hiring charges beyond 15 days and the contractor shall not be allowed to shift the hired transformer until replaced by repaired transformer. In case of any kind of fault / defect occurred in hired transformer, the contractor shall have to arrange further replacement without any additional cost and shall repair the defect from his own expenses. (iii) Contractor should check the available infrastructure and to be sure regarding safety of hired transformer before installation. The rate quoted is deemed to be including transportation cost, earthing lead etc.

Taking out the unserviceable copper winding from transformer of capacity upto 250 KVA after opening top cover, and carrying out the following work complete all as specified and directed :- (a) Dismantling of all attachment viz breather assembly, conservator, oil temperature gauge, HT/LT bushing etc. and keeping aside for reuse.. (b) Taking out the core with winding assembly. (c) Removing of complete winding from core and dismantling the core, cleaning of core laminate sheet and keeping aside for reuse (d) Cleaning of complete transformer tank oil fins, removing of sludge, and making the inside surface of tank dry by blowing of hot air as directed and specified. (e) Painting of outside surfaces of transformer complete by means of spray machine as directed.

All as per item No 6 here-in -before but capacity of transformer 315 to 630 KVA.

Note for Item No 6 & 7 : - In case the defective transformer not repaired & installed at site within the specified period of 15 days from the date of handing over of defective transformer/complaint to contractor, a penalty recovery @ Rs 2500/- per day will be charged from his dues.

(a) Repairs to the transformer of capacity upto 250 KVA as follows :- (i) Rewinding of HT/LT leg coil complete using copper wire /strip of appropriate gauge, size and turn as per existing with double paper coated insulation including all requisite insulating materials like packing sleeves, separator, tapes etc. heating, varnishing the core and winding assembly after framing up top and bottom steel structure of transformer all as specified and directed. (ii) Replacement of all insulating materials other than incorporated for rewinding of HT/LT coils as per existing. (iii) Fixing only HT procelain bushing with studs, nuts, washers 3 Nos. and LT procelain bushing with studs, nuts, and washers 4 Nos. and connection with primary and secondary windings and reconnecting with the main terminals as required and directed. (iv) Fixing only breather assembly, conservator, oil temperature gauge after proper cleaning, minor repairs etc. as required and directed. (v) Replacement of all unserviceable gasket from top cover, HT/LT bushing with new one by using rubberised gasket sheet 4.0mm/6.0mm thick duly pasted with suitable adhesive . (vi) Replacement of unserviceable bolts with new one and fixing of existing serviceable bolts, nuts, washers of different sizes and tightening properly. (vii) Repositioning of core and winding assembly inside the tank, assembling complete unit and making the transformer ready for filling oil and subsequent testing as directed. (viii) Filling/topping up of new transformer oil of required quantities .

(b) M& L for transportation of repaired transformer to the original position (from where taken-down), disconnecting the alternative transformer, taking down the same, Re-installation of repaired indoor/outdoor transformer on 4/6 pole structure/plinth/inside sub station, connecting electrically and mechanically, testing and commissioning complete all as specified and directed. (c) The following routine test as per IS 1180 (Part I) -2014 shall be carried out at repairing workshop/manufacturer having NABL Lab accredition and valid calibration of test equipments (i) Measurement of winding resistance. (ii) Measurement of voltage ratio and check of voltage vector relationship. (iii) Measurement of impedance voltage/short circuit impedance (principal tapping) and load loss . (iv) Measurement of no load loss and current. (v) Measurement of insulation resistance. (vi) Dielectric tests (d) The contractor shall give written warranty of one year from the date of sucessfull testing and installation of transformer. The contractor shall submit test report from repair workshop/manufacturer for above mentioned test. Note :-HT/LT leg coils copper wire/strip and transformer oil required shall be measured and paid separately under relevant items of this Schedule here-in-after as supply only.

All as per item No 8 here-in -before but capacity of transformer 315 to 630 KVA.

Supply only HT coils with super enamelled copper wire /DPC of high quality duly matching with the existing guage and impedance.

Supply only LT coils with super enamelled copper wire strip/DPC of high quality duly matching with the existing guage and impedance.

M&L for ON load Centrifuging and dehydration including filteration and cleaning of transformer oil by dehydration machine of 11/0.433 KV transformer installed at various site on plinth/4/6 pole structure of any capacity and topping up deficient transformer oil including testing of samples before and after dehydration and filteration complete all as specified and directed. Note :- Deficient quantity of Transformer oil required for top up shall be measured and paid separately under item No 13 here-in -after as supply only.

Supply only transformer oil of approved quality as per IS having dielectric strength of 45-60 KV in 2.5mm gap for filling in transformer or for topping up as required and directed

Supplying and fixing in replacement, Porcelain 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 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.

All as per Serial item No 14 here-in-before but capacity 200 KVA to 315 KVA

All as per Serial item No 14 here-in-before but capacity 400 KVA to 630 KVA

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 160 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 transforer oil, opening of top cover by unscrewing nut, bolts washers and connections.

All as per Serial item No 17 here-in-before but 200 KVA to 315 KVA

All as per Serial item No 17 here-in-before but 400 KVA to 630 KVA

Supplying and fixing in replacement, all unserviceable 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 transforer oil, opening of top cover by unscrewing nut, bolts washers etc.

All as per Serial item No 20 here-in-before but 200 KVA to 315 KVA

All as per Serial item No 20 here-in-before but 400 KVA to 630 KVA

Supplying and fixing in replacement, Silica Gel Breather assembly including vent pipe and Silica Gel for indoor/outdoor transformers, capacity upto 160 KVA complete all as specified and directed.

All as per Serial item No 23 here-in-before but capacity 200 KVA to 315 KVA

All as per Serial item No 23 here-in-before but capacity 400 KVA to 630 KVA

Supply and fixing Thermometer of transformer upto capacity 630 KVA complete all as specified and directed.

Material & Labour for painting of transformer installed on plinth/4/6 pole structures at various site of capacity upto 200 KVA with existing colour, with spraying machine, after cleaning, preparation of outer surface of transformer, including writing of SM No, MES and capacity of transformer complete all as specified and directed.

Material & Labour for painting of transformer installed on plinth/4/6 pole structures at various site of capacity 250 to 630 KVA with existing colour, with spraying machine, after cleaning, preparation of outer surface of transformer, including writing of SM No, MES and capacity of transformer complete all as specified and directed.

Earthing complete in replacement with galvanized steel earth plate electrode of size 60cmx60cmx6 mm thick, buried directly in ground (earth pit not less than 3.5 m below normal ground level) with top edge of earth plate not less than 2.5m below normal ground level, connected to galvanized iron strip 32X6 mm by means of electric arc welding of galvanised iron or steel as shown in electrical plate No 3 of SSR Part I, connected to earth test point and the equipment on the other side complete all as specified, including testing and commissioning complete all as directed. Note : - (a) The unit rates quoted against this item shall be deemed to include the cost of excavation and earth work in any type of soil, common salt & charcoal dust in alternate layers, PCC 1:3:6 as in pit, precast RCC 1:2:4 type B-1 with necessary reinforcement as in cover & frame for pit, funnel, watering pipe 20 mm bore GI pipe light grade, protection pipe 40 mm bore GI pipe light grade etc. (b) The quoted rates shall also deemed to include the cost of earth test point and earth strip/GI earthing and protection pipe upto 7.5 meter beyond the earth plates electrode.

M & L for cutting and removing grass, vegetation bushes etc from surrounding 4 pole/6 pole HT structure , outside area of HT/LT installation and removing all rubbish to a distance not exceeding 50 m as directed.

Material and labour for sprading of stone aggregate of nominal size not more than 25mm under 4/6 pole structure /surounding area of outdoor transformer manually without damaging any equipments, cable or parts , spreading & levelling of finished gravel uniformaly in layers n. ecc. 15 cm thick watered and rammed to true surface all as specified and directed.

Disconnecting electrically & mechanically outdoor transforemrs upto 630 KVA capacity, lowering down/getting out from plinth carefully for repairing /making of plinth of transformer and re- connecting electrically and mechanically after repairing/making of plinth , testing and commissioning complete all as specified and directed. Note:- (a) Rate is deemed to be inclusive for hydra , men power, and other items required for temp energization of transformer. (b) M&L used to repair the Plinth shall be measured and paid separetely under items of sch of work here-in -after.

S&F in replacement 100 mm bore GI Pipe light grade with necessary accessories/ fittings for cable protections complete all as directed at site.

Platform :- M & L for Brick Masonry ( Using sub class 'B' Brick) platform of size 2.0 m x 2.0 m x 1 m hight , built in CM 1:4 complete with excavation & earth work , PCC 1:4:8 type D-2 in foundation 150 mm thick , 15 mm thick rendering in CM 1:6 on sides and top of the brick work , upto 150 mm below ground level , supply and fixing of 02 Nos MS Channels of ISMC -75 of suitable size for balancing of Transformer embedded in PCC 1:2:4 type B-1 up to 100 mm Thick RCC 1:2:4 with 10 mm steel bar includding 20 mm graded stone aggregate , including provn of steps on one side complete all as specified and directed .

M & L for PCC 1:3:6 type C-2 (using 40 mm gradded aggregate) for foundation, filling and mass concrete etc complete all as specified and directed .

M & L for cement concrete type B-1, 1:2:4, 50 mm thick (using 20 mm gradded aggregate) for floors and paving etc complete all as specified and directed.

S&F in replacement MS angle iron, flat,Cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers,welding, bending cold or hot,drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint.

S&F in replacement 3.15mm dia MS wire 75x75mm mesh , made up into mattress or cages appx 2.00 mtr height and fixed with flat iron /angle by welding in position complete all as specified directed .

M & L for 2 coat of synthetic enamel painting over a coat of red oxide primer to MS wire fencing including preparation of old surface complete all as specified.

Supply and fill in replacement silica gel in breather of transformer complete all as directed

Material and labour in replacement Retro Reflective installation sign boards of size 5 feet x 4 feet fabricated out of 16 gauge MS sheet frame duly welded/riveted with MS square pipe of size 25mm x25mm at height 2.00 meter above ground level on stainless steel heavy duty pipe of size 50mm bore embaded 60 CM in PCC 1:2:4 type B 1 block of size 45cmx45cmx60cm including necessary excavation and earth work .The steel portion of the board shall be painted in stove enameled paint and the front & back of the frame shall be overall sheathed with blue colour base painter adhesive tape. The wiriting matter will be in English language on both sides with reflective adhesive painter tapes as directed by Engineer -in-charge.

Supply installation & commissioning in replacement of 24V/40A Float Cum Boost Battery Charger unit including battery bank comprising 02 Nos of 12 Volts-100 AH sealed maintenance free battery. The CCCV battery charger consisting of copper wound, air cooled transformer, 01 Set single phase full wave bridge rectifier consisting of diodes and SCRs, liberally rated mounted on heat sink and complete with resistor/condenser network for surge supperssion . During auto float mode automatic changeover shall take place from float mode to boost mode and vice versa, 01 Set of solid state constant potential controller to stabilize the DC output voltage of the float cum boost charger, 01 No electronic controller , DC digital ammeter , DC digital voltmeter, Potentiometer , DC, MCB for reverse battery protection . The charger should have alarm annunciation with visual and audible alarm with manual reset facility for fuse fail alarm. Float cum boost battery charger and DC distribution board shall be housed in powder coated sheet steel cubicle with panels of 1.6mm thickness , louvers for ventilation , gland plate will be provided for cable entry from bottom . The battery charger shall be divided into two compartments. The upper compartment shall house the battery charger & DCDB with all necessary controls. The lower compartment shall be suitable for housing the batteries. Tech specification shall be as under:-

(a) Input working voltage-180 -270 Volts (b) Nominal Input Voltage - 230 V , AC , 50 Hz,1 (c) On load input power factor - > 0.8 (d) On load unit watt efficiencies-> 80% (e) No load losses of complete charge-< 10% (f) Ripple contents on the load (RMS)= 1% to 5% (g) Over load - 110% for 30 minutes and will give visual indication for over load condition. (h) Boost charging - 2.4 V/Cell . (j) Float charging -2.15 V/Cell (k) Float cum boost charging-Automatically changes from one state to another state as per battery condition and will give the visual indication for either float or boost based on charging mode. (l) Reverse polarity -No damage will caused . A visual indication for reverse polarity will appear with an audio alarm. (m) Short circuit-MCB protecton provided.

Disconnecting HT supply from 11 KV , 630 Amps RMU , 5/4 way and servicing and overhauling of RMU , checking of tripping mechanism , greasing of moving contacts , cleaning of carbon from main contacts , checking of spring tension ,Checking of loosened bolts and nuts, checking of loosened connections, rust, damaged lead wires, checking of spring charging motor , Improvement of resistance of CTs , PT, epoxy insulator and epoxy body by applying post heated varnish complete all as directed and testing on load

(a) Details of servicing of RMU :- (i) Adjustment of mechanism if required. (ii) Clean the circuit breaker to remove dust and dirt and insulating materials shall be wiped with a clean cloth. (iii) Apply a small amount of oil to rotary sections, sliding surfaces, pins, coupling section, etc.use grease for the operating shaft and bearings, and machine oil for other parts. (iv) Check for rust and wear. (v) Check Spring Tension and pitting of the Cluster Contacts. (vi) Visual check for rust and deformation. (vii) Check for loosened bolts and nuts, broken spring washers and snap pins etc. (viii) Check for loosened connections, rust, damaged lead wires. (ix) Check whether the contacts are damaged by arcing.

(x) Checking of control circuit & tighten the connections if any. (xi) Check close & trip coil. (xii) Improvement of resistance of epoxy insulator and epoxy body by applying post heated varnish. (b) The following test shall be carried out:- (i) Primary Injection Test of CT / PT (ii) Closing & Opening Timing Test for all three poles. (iii) IR Test with megger in open and closed condition. (c) Testing of following relays of control panel with Secondary Injection Kit ,checking and programming of relay.

Supply and fixing in replacement of cable bushinng suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemenscomplete all as directed by Engr In Charge by Engr In Charge.

Supply and fixing in replacement of Manometer assembly suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemens complete all as directed by Engr In Charge by Engr In Charge.

Supply and fixing in replacement of Standered motorised Kit for V module suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemens complete all as directed by Engr In Charge by Engr In Charge.

Supply and fixing in replacement of Spring charging Motor with Gear 24 V DC (NHP201491R1) suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemens complete all as directed by Engr In Charge by Engr In Charge.

Supply and fixing in replacement of Capacitor Unit,VPIS, 9-15kV without cord suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemens complete all as directed by Engr In Charge by Engr In Charge.

Supply and fixing in replacement of Trip Coil Only Y1 Control Volt 24 VDC suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemens complete all as directed by Engr In Charge by Engr In Charge.

Supply and fixing in replacement of Close Coil Only Y2 Control Volt 24 VDC suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemens complete all as directed by Engr In Charge by Engr In Charge.

Supply and fixing in replacement of TERMINAL PROTECTOR SILCAB (RAYCHEM) for 11kV suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemens complete all as directed by Engr In Charge by Engr In Charge.

Material and labour for filling of SF6 gas and testing suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemens complete all as directed by Engr In Charge by Engr In Charge.

Supply and fixing in replacement of Operating mechanism suitable for RMU, 11 KV, 630- 800 Amp, 3-7 way, Make- ABB, Siemens complete all as directed by Engr In Charge by Engr In Charge.

Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size :-

95 Sqmm 3 core.

120 Sqmm to 185 Sqmm, 3 core.

240 Sqmm to 300 Sqmm, 3 core.

Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of following size :-

95 Sqmm 3 core.

120 Sqmm to 185 Sqmm, 3 core.

Note : contractor should procure and provide 50 % of the material as listed above within 15 days of the placing of work order and shall be verified by the Eng-in-charge

DS CONSTRUCTION

Vijay Electricals

MV Engineers And Contractors

M/s JAIMAA ASSOCIATES

M P TYAGI ENGINEERS AND CONTRACTORS

Rajindera Enterprises

mayur enterprises