Repair comprehensive maintenance to distribution transformers including connected items in the area of AGE U Elect Supply No III 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 labour for alternative arrangement by hiring, transportation of transformer of capacity upto 500 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 specifed and directed. Note : (i) Repairing of transformer have to be completed within 15 days no extra cost will be paid toward hiring charges beyond 15 days . Moreover contractor shall not be allowed to shift the hired transformer until it is replaced by the repaired transformer . In case any fault /burning /peeling of painting and any other defects occured in hired transformer the contractor shall have to made good himself from his own expenses. (ii) Contractor should check the available infrasturcture and to be sure regarding safety of hired transformer before installation . The rete quoted is deemed to be include transportation cost, earthing lead etc. (iii) In case the defective transformer not repaired & installed on its site within the specified period of 15 days from the date of handing over to contractor a penalty recovery @ Rs 1000 /- per day will be charged from his dues. During this period contractor shall not be allowed to shift the hired transformer until it is replaced by the repaired transformer . No extra cost beyond 15 days will be paid to contractor on this account.

All as per item No 4 here-in -before but capacity of transformer 630 to 1000 KVA.

Taking out the unserviceable copper winding from transformer of capacity upto 500 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 630 to 1000 KVA.

(a) Repairs to the transformer of capacity upto 500 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 2026 (Part I) -1977 shall be carried out at repairing workshop/manufacturer having NABL Lab accredition and valid calibration of test equipments and shall submit MOU with any repairing workshop/manufacturer as per format attached along with quoted tender, bid shall be rejected in case of non submission of MOU/MOU from non qualified repair workshop/manufacturer : (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 630 to 1000 KVA.

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

Supply in replacement 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 in replacement 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 to 500 KVA

All as per Serial item No 14 here-in-before but capacity 630 KVA to 1000 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 to 500 KVA

All as per Serial item No 17 here-in-before but 630 KVA to 1000 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 500 KVA

All as per Serial item No 20 here-in-before but 630 KVA to 1000 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 500 KVA

All as per Serial item No 23 here-in-before but capacity 630 KVA to 1000 KVA

Supply and fixing in replacement Thermometer of transformer upto capacity 1000 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 500 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 630 to 1000 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 and labour for cleaning of 2/4/6 pole structure for loose filling under 2/4/6 pole structure / along the transformer plinth in side the fencing area after cleaning/surface excavation including taking out grass/herbs and filling of aggregate. Note: Aggregate will be paid seperately at item No 37

Cutting/trimming of tree branches around transformer,2/4/6 pole strcture up to 5 mtr distance at all sides and disposal complete all as specified and directed.

M&L in replacement Earthing complete with galvanised steel earth plate electrode 600x600x6mm thick,40mm bore medium grade (steel pipe) buried directly in ground (earth pit not less than 2.25m deep below GL) with top edge of the plate not less than 1.5m below normal GI, connected to galvanised earth strip 32 x 6 mm by means of bolts nuts check nuts and washers of galvanised iron or steel all as shown in electrical plate No.3 connected to earthing test point all as specified or indicated including testing on completion. Note : Rate shall be deemed to be inclusive of necessary excavation and earth work in any type of soil, removal of surplus soil to a distance not exceeding 50 M RCC covers slab and PCC chamber etc.

Material and labour in replacement for earthing complete with copper plate earth plate electrode 60 x 60 cm and 3.15 mm thick burried directly in ground (earth pit not less than 2.25 m deep below ground level) with top edge of plate not less than 1.5 m below ground level connected to copper earth strip 20 x 3 mm size by means of nuts, bolts, check nuts and washers of copper all as shown in electrical plate No 3 connected to earthing test point all as specified and directed and 20 mm GI pipe light grade with funnel for watering and 40 mm GI medium grade pipe 7.5 mtr for GI earth strip protection from earth pit to test point & PCC for pit with white wash including CI pit cover 30 x 30 cm by taking down old unserviceable earthing. Note : Contractor should deposited test results of earthings.

M & L for Copper earth strip of size 32 x 6 mm laying in trench, fix to pole with necessary clamp and nut, bolt etc including taking out of unsv earth wire.

Supply and fix in replacement air break switch gang operated tripple pole mechanically operated mechanism, switch air break gang operated mounted on 15 Nos insulator and steel frame with operating rod of 25 mm bore GI Pipe and locking arrangements worked from ground level for current rating 200 Amps, HT 11 KV grade including drop out fuses and necessary silver coper coating jumpers and making all electrical connections complete.

Material & Labour for replacement of jumper/bus bar made of ACSR conductor of existing size on HT Four/Six pole structure having 2/3 incoming/outoing feeder including bus bar with PVC sleeve , lugs , nut bolts and washers complete all as directed.

All as per Serial item No 33 here-in-before but 4/6 incoming/outgoing feeder

Material and labour for spreading 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 transformers upto 1000 KVA capacity, lowering down/getting out from plinth 4/6 pole sturucture 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) Plinth work shall be measured and paid separetely under items of sch of work here-in -after.

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 mtr deep in any type of soil (soft/losse soil) for foundation of transformer etc and getting out and levelling of bottom suface to required level all as specified and directed by Engineer- in- Charge.

Returning filling in,. Including spreading, levelling,. Watering and well ramming soil in layers not exceeding 25 cm thick all as specified and directed.

Removing excavated material (ie soil) from site to a distance n. exc 50 mtrs away and depositing where directed at a level n. exc. 1.5 mtr above the starting point all as specified and directed by Engineer-in-Charge.

M&L for Sand filling under floors or in foundations including watering and consolidation complete all as specified and directed .

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

M&L Brick work with sub-class 'B' bricks, straight or curved on plan exc 6 m mean radius, built in cement mortar 1:6 complete as specified and directed.

M&L Rendering 15mm thick on fair faces of brick work or concrete surfaces in cement mortar (1:4) finished fair and even without using extra cement complete 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 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 3.15mm dia MS wire 75x75mm mesh , made up into mattress or cages appx 2.00 mtr height and fixed with flate iron /angle by welding in position complete all as specified directed .

M&L in replacement 32x6mm galvanised iron strip for earth continuity conductor for earthing of transformer , GOD , 4/6 pole , structure etc complete all as directed.

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

DS CONSTRUCTION

Buddham Builders

MV Engineers And Contractors

M/s VINOD KUMAR SHARMA

M/s ELECTROSHINE ENGINEERS

M/s KUNDU CONSTRUCTION

mayur enterprises