CA NO. CWE/CHM(U)-95/2023-24 REPAIR/MAINT OF DISTRIBUTION TRANSFORMERS AND CONNECTED ITEMS OF WORK, EARTHING ETC AT VARIOUS LOCATIONS UNDER GE (U) CHANDIMANDIR

Amount

Disconnecting and taking out old burnt HT cables of any size incl joints/ protection pipes etc from trenches/ ducts/ poles etc complete all as specified and as directed by Engineer-in-charge.

Disconnecting the electric supply and taking out old UNSV panel board/feeder pillar box of any type complete all as specified and as directed by Engineer-in-charge.

Taking down old unserviceable HT GOD of any size/type complete all as specified and as directed by Engineer-in-charge.

M & L GI pipe, light grade, 100 mm dia for cable protection on poles/walls/under road/culvert etc complete all as specified and as directed by Engineer-in-charge.

Excavation in trenches n. exc. 1.5 mtr width n.exc 1.5 mtr in depth for laying of cables & foundation of poles, stay assembly etc and getting out in any type of soil complete all as specified and as directed by Engineer-in-charge.

Returning, filling in including spreading, levelling, watering and well ramming in layers not exc. 25cm in any type soil complete all as specified and as directed by Engineer-in-charge.

Removing of surplus excavated soil to a distance not exc. 50m and depositing where directed at a level not exc 1.5 Mtr above the starting point complete all as specified and as directed by Engineer-in-charge.

Supply and filling clean dry sand (unwashed) in trenches under and around the cable for cushioning all as specified.

Supplying and laying un-reinforced precast concrete cable cover, class HV, type 1 flat, size 300mm x 180mm x 40mm complete all as specified and as directed by Engineer-in-charge.

M & L for complete servicing/maint of compact type sub station using proper T & P and expert technicians, comprising of dry type/ oil filled transformer 11 KV/ 415 volts along with HT circuit breaker, connections on HT/LT side, control wiring on HT/LT side by cleaning all the parts dust free properly using a suitable hot air blower and soft cloth, checking and tightening of all hardwares, checking/ repairing/ adjusting and lubricating the operating/ spring charging/ tripping mechanism of HT breaker, checking connections of controls and relays for proper working, calibration of relays for proper functioning, checking and tightening of all earthing connections, cleaning of HT/LT side bus bar contacts with fine emery paper and CRC, replacement of worn out nuts/ bolts/ washers, checking insulation on HT/LT side, checking and tightening of all connections of HT/LT cables and testing for satisfactory working complete all as specified and as directed by Engineer-in-charge. Note: Other Items except as mentioned here-in-before such as winding, replacement of transformer core etc, if required shall be measured and paid separately under respective items.

M&L for Disconnecting HT and LT supply, taking down the defective transformer (Indoor/ outdoor type) from four pole/ two pole structure or lifting from the outdoor type foundation or taking out from sub station building, using a crane of suitable capacity & slings/ ropes etc as required and shifting the same to civil workshop for repairs complete all as specified and as directed by Engineer-in-charge for transformer capacity up to 200 KVA.

All as per item No 11 here-in-before but capacity from 250 KVA to 400 KVA

All as per item No 11 here-in-before but capacity from 500 KVA to 750 KVA

All as per Item No 11 here-in-before but capacity from 1000 KVA to 1600 KVA

M&L for Shifting back the repaired transformer (Indoor/ outdoor type) from civil workshop to site, reinstalling at original position and fixing properly on four pole/ two pole structure or outdoor type foundation or inside a sub station building, using a crane of suitable capacity & slings/ ropes etc as required, making HT/LT side connections and testing for satisfactorily working complete all as specified and as directed by Engineer-in-charge for transformer up to 200 KVA.

All as per item No 15 here-in-before but capacity from 250 KVA to 400 KVA

All as per item No 15 here-in-before but capacity from 500 KVA to 750 KVA

All as per Item No 15 here-in-before but capacity from 1000 KVA to 1600 KVA

M&L for Draining out transformer oil from the transformer & storing the same in suitable containers (to be arranged by contractor without any extra cost), opening the top cover and lifting up the core assembly carefully to check the condition of transformer windings and core, retanking the same after repairing, checking of leakage from transformer body and repairing/ welding works, if required for making transformer body leak proof, refilling the transformer oil dully dehydrated and filtered (dehydration and filteration to be paid separately) & making all connections with HT/LT side bushings, refixing the top cover, and testing the transformer with a suitable capacity insulation tester complete all as specified and as directed by Engineer-in-charge for transformer up to 200 KVA.

All as per item No 19 here-in-before but capacity from 250 KVA to 400 KVA

All as per item No 19 here-in-before but capacity from 500 KVA to 750 KVA

All as per Item No 19 here-in-before but capacity from 1000 KVA to 1600 KVA Note for item No 19 to 22 :- [a] All repair works such as rewinding, core repairing, oil filling, bushings, gaskets, valves etc shall be measured and paid separately.

M & L for rewinding of burnt out/ defective HT copper coils with new super enamelled heavy duty copper winding wires of size matching to the existing one including varnishing, drying in a suitable oven and all insulating material such as cotton sleeves, tapes etc and connections with bushing terminals complete all as specified and as directed by Engineer-in-charge.

All as per item No 23 above but LT copper coils complete all as specified and as directed by Engineer-in-charge.

M & L for rewinding of burnt out/ defective HT aluminium coils with new super enamelled heavy duty aluminium winding wires of size matching to the existing one including varnishing, drying in a suitable oven and all insulating material such as cotton sleeves, tapes etc and connections with bushing terminals complete all as specified and as directed by Engineer-in-charge.

All as per item No 25 above but LT aluminium coils complete all as specified and as directed by Engineer-in-charge. Note for item no. 25 & 26 :- Transformer taken to civil workshop for repairing shall be shifted back to site dully repaired within 14 days from the date of issue. A penality of Rs 1500/- per day per transformer shall be imposed after expiry of 14 days period in case the contractor fails to do so.

M & L for replacement of HT tap changer off load type, of suitable size with tapping arrangement from (+/-) 2.5%to 7.5% and one normal tapping including connecting up with HT coil and testing for transformer capacity up to 200 KVA complete all as specified and as directed by Engineer-in-charge.

All as per item No 27 above but for capacity 250 to 400 KVA.

All as per item No 27 above but for capacity 500 to 750 KVA.

All as per Item No 27 above but capacity from 1000 KVA to 1600 KVA

M & L for reconditioning/ refurbishment of complete windings and core assembly by opening & cleaning the LT/HT windings coils, replacement of worn out insulation materials, replacing worn out glass sleeve insulations, cleaning with hot oil to remove carbon deposits/ sludge & restacking of core laminations to reuse again, making all star delta connections properly, drying the core assembly in a suitable heat oven for improving the insulation value complete all as specified and as directed by Engineer-in-charge for any capacity of transformer.

M & L for painting the transformer tank from inside with two coats of zinc chromite after preparing the tank walls/ bottom/ top cover inner side by properly cleaning the surfaces oil free for transformer capacity upto 200 KVA complete all as specified and as directed by Engineer-in-charge.

All as per item No 32 above but for capacity 250 to 400 KVA.

All as per item No 32 above but for capacity 500 to 750 KVA.

All as per Item No 32 above but capacity from 1000 KVA to 1600 KVA

M & L for replacement of defective HT porcelain bushing of suitable size for transformer upto 200 KVA including washers of good quality complete all as specified and as directed by Engineer-in-charge.

All as per item No 36 above but for capacity 250 to 400 KVA.

All as per item No 36 above but for capacity 500 to 750 KVA.

All as per Item No 36 above but capacity from 1000 KVA to 1600 KVA

M & L for replacement of defective LT porcelain bushing of suitable size for transformer upto 200 KVA including washers of good quality complete all as specified and as directed by Engineer-in-charge.

All as per item No 40 above but for capacity 250 to 400 KVA.

All as per item No 40 above but for capacity 500 to 750 KVA.

All as per Item No 40 above but capacity from 1000 KVA to 1600 KVA

M & L for replacement of wornout HT bush rod made out of copper with brass nuts and washers of required length including connecting up with HT coil of transformer upto 200 KVA complete all as specified and as directed by Engineer-in-charge.

All as per item No 44 above but for capacity 250 to 400 KVA.

All as per item No 44 above but for capacity 500 to 750 KVA.

All as per Item No 44 above but capacity from 1000 KVA to 1600 KVA

M & L for replacement of wornout LT bush rod made out of copper with brass nuts and washers of required length including connecting up with LT coil of transformer upto 200 KVA complete all as specified and as directed by Engineer-in-charge.

All as per item No 48 above but for capacity 250 to 400 KVA.

All as per item No 48 above but for capacity 500 to 750 KVA.

All as per Item No 48 above but capacity from 1000 KVA to 1600 KVA

Supply and filling as in replacement of superior quality silica jel inside the breather assembly and fixing properly with transformer complete all as specified and as directed by Engineer-in-charge.

M & L for disconnecting from the transformer/ panel board, cutting off worn out aluminium cable end, supply and fixing of new aluminium heavy duty cable lug, connecting the cable with transfrormer/ panel including insulation tapes etc complete all as specified and as directed by Engineer-in-charge for 120 sqmm to 150 sqmm 3.5 core sizes of LT cables.

All as above per item No 53 above but size 185 sqmm to 240 sqmm 3.5 core.

All as above per item No 53 above but size 300 sqmm to 400 sqmm 3.5 core.

All as above per item No 53 above but size 500 sqmm to 630 sqmm 3.5 core.

Dehydration and filteration of transformer oil for indoor/ outdoor type transformers of any capacity, at site using transformer oil filteration plant to improve di-electric strength not less than 45 KV at 2.5 mm electrode gap complete all as specified and as directed by Engineer-in-charge. Note :- Unit rate quoted shall be deemed to include the charges for hiring of oil filteration plant, shifting to different locations within the AOR of GE(U) chandimandir, testing of samples of oil as per requirement & nothing extra will be paid on this account.

S & F in replacement transformer radiator, fabricated from pressed steel sheet all as per existing size and type including fixing arrangement by making welding joint or flanged joints with gaskets/ nuts/ bolts etc for transformer capacity from 200 KVA and upto 315 KVA complete all as specified and as directed by Engineer-in-charge. Note :- Joints shall be leak proof and any leakage noticed after repair work shall be rectified by the contractor without any extra cost to the department.

All as per item No 58 above but transformer capacity from 400 KVA and upto 500 KVA.

All as per item No 58 above but transformer capacity from 630 KVA and upto 750 KVA.

All as per item No 58 above but transformer capacity from 1000 KVA and upto 1600 KVA.

M & L for preparation of external portion of indoor /outdoor type transformers for re-painting by removing old paint/ oily patches by scrubbing and cleaning dust free, painting with two coats of superior quality synthetic enamelled paint of approved shade complete including cleaning name plate/ insulators/ conservator level indicator paint free complete all as specified and as directed by Engineer-in-charge for capacity up to 200 KVA. Note:- The painting of transformer shall be carried out in situ i.e. on four pole/ two pole structures or kept on foundation or kept inside sub station at different places within the AOR of GE (U) Chandimandir.

All as per item No 62 here-in-before but for capacity from 250 KVA to 400 KVA.

All as per item No 62 here-in-before but for capacity from 500 KVA to 750 KVA.

All as per item No 62 above but transformer capacity from 1000 KVA and upto 1600 KVA.

S & F new transformer oil for replacement or topping up the level of oil having dielectric strength not less than 45 complete all as specified and as directed by Engineer-in-charge.

Supply, installation, commissioning and testing of outdoor type floor mounting double door feeder pillar box of suitable size fabricated from 3.15 mm thick CRCA sheet and MC 75 for base channel, 04 nos legs 750 mm long made from 50 x 50 x 6 mm angle iron, duly powder coated, dust and water proof, grouted in PCC 1:2:4 type B-1 foundation, suitable for 415 volts, 3 phase, 4 wire , 50 Hz complete all as specified and as directed by Engineer-in-charge and including the following:-

[a] Aluminium strip bus bar TPN sleeve insulated mounted on epoxy insulators of capacity 1000 amps-01 set

[b] ACB FP 800 amps , 415 volts, 50 Hz, 50 KA fixed type- 01 No (Incoming)

[c] MCCB FP 400 amps, 415 volts, 50 Hz, 35 KA with adjustable thermal and magnetic release and Ics=100% of Icu - 01 No , MCCB TP 250 amps, 415 volts, 50 Hz, 35 KA with adjustable thermal and magnetic release and Ics=100% of Icu - 02 No, MCCB TP 100 amps, 415 volts, 50 Hz, 35 KA with adjustable thermal and magnetic release and Ics=100% of Icu - 01 No (Outgoing)

[d] Earthing terminals - 02 Nos and danger notice plate - 01 No.

[e] Digital voltmeter three phase 0-500 volt range size 96x96 mm - 01 No, Digital ammeter three phase 0-400 volt range size 96x96 mm - 01 No, LT CTs ratio 400/5 amps - 03 Nos, control wiring with single core copper cable FRLS of suitable size incl control MCB for each circuit complete.

M & L for replacement of transformer core built up of silicon steel cold rolled with hot - oil proof grain oriented laminations of varnish or carlite, insulation on both sides complete all as specified and as directed by Engineer-in-charge .

Shifting of transformer of any capacity using hydra/ crane etc of suitable size from existing pole structure/ plinth/ store yard and fixing on another pole structure/ plinth/ store yard including necessary connections on HT and LT side complete all as specified and as directed by Engineer-in-charge.

M & L cleaning of transformer radiator with hot insulating oil to remove all blockages/ sludge etc by dismantling the same from the transformer tank body and refixing the same by making welding joint or flanged joints with gaskets/ nuts/ bolts etc all as per existing for transformer capacity upto 750 KVA complete all as specified and as directed by Engineer-in-charge. Note :- Joints shall be leak proof and any leakage noticed after repair work shall be rectified by the contractor without any extra cost to the deptt.

Supply, laying, connecting and testing in trenches/ ducts/ fixing along the poles/ passing through pipe/ laid under floors XLPE insulated, screened PVC bedded, galvanised steel strip armoured, heavy duty HT power cables, ISI marked with aluminium conductor, 11000 volts grade, cross sectional area 120 sqmm 3 core, 11 KV earthed, complete all as specified and as directed by Engineer-in-charge.

All as per Item No 71 here-in before but size 240 sqmm 3 core

S & F in replacement, three phase digital type voltmeter with input 0-110 VAC and range 0-11 KV AC, accuracy ± 1.0%, PTR 11 KV/ V3/ 110V/ V3, square shape size 96x96 mm, flush mounting type, on the HT 11 KV panel boards at various locations all as per existing incl making all connections with control wiring and testing for proper working complete all as specified and as directed by Engineer-in-charge.

S & F HT heat shrinkable type outdoor end termination cable jointing kit with jointing material and accessories sutable for 11000 volt (Earthed) grade XLPE cable of size 95 Sqmm, 3 core complete all as specified and as directed by Engineer-in-charge.

All as per item No 74 here-in-before but of size 120 to 185 Sqmm, 3 core complete all as specified and as directed by Engineer-in-charge.

All as per item No 74 here-in-before but of size 240 sqmm, 3 core complete all as specified and as directed by Engineer-in-charge.

S & F HT heat shrinkable type indoor end termination cable jointing kit with jointing material and accessories sutable for 11000 volt (Earthed) grade XLPE cable of size 95 Sqmm, 3 core complete all as specified and as directed by Engineer-in-charge.

All as per item No 77 here-in-before but of size 120 to 185 Sqmm, 3 core complete all as specified and as directed by Engineer-in-charge.

All as per item No 77 here-in-before but of size 240 sqmm, 3 core complete all as specified and as directed by Engineer-in-charge.

S & F HT straight through heat shrinkable type cable jointing kit for 11 KV grade, XLPE cable of size 95 sqmm 3 core complete all as specified and as directed by Engineer-in-charge.

All as per item No 80 here-in-before but of size 120 to 185 Sqmm, 3 core complete all as specified and as directed by Engineer-in-charge.

All as per item No 80 here-in-before but of size 240 sqmm, 3 core complete all as specified and as directed by Engineer-in-charge.

S & F in replacement clear view type silica gel breather of suitable size for transformer capacity upto 160 KVA complete all as specified and as directed by Engineer-in-charge.

All as per item No 83 here-in-before but for capacity 200/250 KVA complete all as specified and as directed by Engineer-in-charge.

All as per item No 83 here-in-before but for capacity 300 KVA to 400 KVA complete all as specified and as directed by Engineer-in-charge.

All as per item No 83 here-in-before but for capacity 500 KVA to 630 KVA complete all as specified and as directed by Engineer-in-charge.

All as per item No 83 here-in-before but for capacity 750 KVA complete all as specified and as directed by Engineer-in-charge.

All as per item No 83 here-in-before but for capacity 1600 KVA complete all as specified and as directed by Engineer-in-charge.

S & F in replacement DC power pack with battery back up, input 230 volts AC and output 24 volt DC, capacity 100 watt 4 amps complete with operation indicators, terminal block, safety fuse etc and making connections with the existing circuits in HT VCB panels complete all as specified and directed. Make : ALAN type APP230024 or equivalent as approved by GE.

M & L for rectifying and arresting the oil leakage of transformer of any type (indoor/outdoor) and capacity up to 150 KVA installed inside sub stn bldg or on open foundation or on four pole/two pole structure , disconnection of cable termination of HT & LT ends. , opening the top cover by using tripod/chain and pulley after removing all fitments, replacing the following components of the transformer such as gaskets, "O" rings, etc and rectify the leaks in a variety of areas such as top cover, radiator fins, flanges, valves, conservator, Oil leakage through pin hole / crack joint , drain valve / radiator valve ,HT/LT bushes, Oil leakages through any gasket joints. Applying putty/M-Seal Monoplast where ever necessary. Refixing the top cover and all fitments, refixing cable termination of the HT & LT ends, testing complete all as specified and as directed by Engineer-in-charge.

NOTE : (i) Contractor shall be provide necessary tripod, chain & pulley, T&P, etc and the rent shall deemed to be included in the quoted rate. (ii) Cost of all type of gasket, "O" rings, putty/M-Seal Monoplast, lugs, nut bolt, double washers, etc shall deemed to be included in the quoted rate.

All as per item No 90 here-in-before but transformer capacity 160 to 250 KVA

All as per item No 90 here-in-before but transformer capacity 300 to 400 KVA

All as per item No 90 here-in-before but transformer capacity 500 to 750 KVA

All as per item No 90 here-in-before but transformer capacity 1600 KVA

S & F in repairs HT / LT side box covers made of bakelite sheet 6 mm thickness with proper nuts bolts incl cutting sheet to required size , drilling holes for nuts/bolts etc complete all as specified and directed.

M & L for earthing complete with galvanised steel earth plate electrode 60cmx 60cmx 6mm thick burried directly in ground (earth pit not less than 2.25 Mtr deep below ground level) with top edge of the plate not less than 1.5 Mtr below normal ground level, connected to galvanised earth lead strip 32mmx 6mm by means of bolts, nuts, check nuts and washers of GI or steel all as shown in electrical plate No. 5 of SSR Part-I 1991 connected to earthing test point panel all as specified or indicated and testing on completion as directed by the Engineer-in-Charge including necessary excavation & earth work in any type of soil, funnel, PCC chamber (1 : 3 : 6) type C1, CI pit cover and frame , charcol, salt including earth lead protected by 40 mm dia medium grade GI pipe and 20mm dia medium grade GI Pipe for watering complete all as specified and as directed by Engineer-in-charge. Note :- Earth lead strip 32 x 6 mm and GI 40 mm dia protecion pipe upto 7.5 mtr length will be deemed to include in the unit rate quoted.

M & L for drain out/ filling in oil valve screwed both ends with iron wheel head suitable for transformers up to 160 KVA capacity complete all as specified and as directed by Engineer-in-charge.

All as per item No 97 here-in-before but for 200 to 315 KVA.

All as per item No 97 here-in-before but 400 to 750 KVA.

All as per item No 97 here-in-before but 1000 to 1600 KVA.

S & F gang operated air break switches, (GO & DO assembly) triple pole, manually operated, mounted on insulators and steel frame, 12 insulators type, with operating mechanism worked from ground level for rating 200 Amps, 11000 volts complete with GI operating pipe of heavy duty grade of suitable length complete all as specified and as directed by Engineer-in-charge.

M & L for shifting of standby trolley mounted transformer of capacity 500/ 750 KVA including its HT/ LT cables from one location to another location and back to original site or to MES store yard inside the cantt area by using towing vehicle and crane etc. Dismantling the HT/LT connection of the existing faulty transformer, connecting the HT / LT cable of the trolley mounted transformer with the existing load, connecting the transformer with body and neutral earth with existing earth lead and testing with load.

NOTE : (i) The works includes the removal and refixing of all connection, cable, etc of both transformers. (ii) Contractor shall shift and connect the trolley mounted transformer immediately within eight hrs when AGE E&M / JE E&M inform through mobile message (iii) If contractor fails to shift and connect the trolley mounted transformer within eight hrs, a panality of Rs.1000.00 per hour after eight hour shall be imposed. (iv) Rent of toeing vehicle, labour used, tools used shall deemed to be included in the quoted rate. (v) Contractor shall take care of transformer while shifting, any damage occured during the progress of the work while shifting will be rectified by the contractor at his own cost.

M & L for rewiring of the complete control circuits of 11 KV HT VCB of any make with single core copper conductor cable of size as per existing for metering/safety relays/indicators/charging system/tripping closing wiring circuits/ connections from CTs, PTs/ cubical lamp & socket/ thermostat & space heater/ DC power supply system for relays etc incl numbering ferrules for marking of the circuits complete all as specified and as directed by Engineer-in-charge.

S & F in replacement double needle transformer oil temperature gauge 0-120 degree analogue dial type able to record instantaneous and maximum temperature of transformer oil complete all as specified and as directed by Engineer-in-charge

M & L for writing SM No/ MES No on HT equipements panel boards etc with synthetic enamelled paint of approved shade, with capital letters and numbers, size of letters/ numbers not less than 50 mm in height, completre all as specified and directed. Note :- Total no of letters/ numbers shall be upto 20 in each job.

Raman Electric Trading Co

Bharat Enterprises