REPAIR AND MAINT OF HT DISTRIBUTION NETWORK AND ALLIED WORKS UNDER GE GOMANTAK

Disconnecting HT/LT cable and Earthing connections of burnt/defective transformer of capacity 63 to 800 KVA , 11 KV/433 volts 3 phase from pole/floor mounted, taking from site of installation carefully with the help of Crane and transportation of the same to workshop for repairs, draining out the transformer oil, dismantling complete and taking out the core assembly and removing burnt out windings, dehydrating the core assembly, reassembling transformer after repair, replacement of complete gasket set, refilling the oil duly filtered / dehydrated, topping up with new oil, carrying out routine tests,welding work,leakage repairing and complete servicing including transportation back to site, testing and commissioning of the repaired transformer at site on full load after making cable and earthing connections complete all as specified and directed. (Note :- New transformer oil, Dehydration of Transformer oil,LT /HT bushings/studs shall be measured and paid separately.).

Material and labour for rewinding in repair of HT winding with Copper strip of suitable size/gauge, fixing the coil in position in core assembly and making connection as per original pattern including providing insulation,varnish, all as specified and directed by Engr-in-Charge.

(a) Transformer 500 - 800 KVA capacity

(b) Transformer 200 - 315 KVA capacity

(c) Transformer 63 - 160 KVA capacity

All as per item No. 4 above but LT limbs of following capacities :-

(a) Transformer 500 - 800 KVA capacity

(b) Transformer 200 - 315 KVA capacity

(c) Transformer 63 - 160 KVA capacity

S&F in repairs Brass metal studs nut & washers suitable for 11 KV HT side of transformer 63 KVA to 800 KVA all as specified & directed by Eng-in-Charge.

S&F in repairs Brass metal studs nut & washers suitable for 11 KV LT side of transformer 63 KVA to 800 KVA all as specified & directed by Eng-in-Charge.

Supply & fixing in repairs HT bushing suitable for 63 KVA to 800 KVA Transformer complete all as specified.

Supply & fixing in repairs LT bushing suitable for 63 KVA to 800 KVA Transformer complete all as specified.

M & L for repair of conservator unit complete by gas weilding stopping oil leakage incl testing , comissioning complete for satisfactory operation of transformer upto 800 KVA capacity .

S & F temperature gauge suitable size for transformer of capacity 100 KVA to 800 KVA.

S & F level indicator glass of existing size of the transformer of any capacity including replacement of allied gaskets complete and draining out transformer oil from conservator.

Supply and replace in repairs of fabricated transformer HT/LT cable box cover plate suitable for HT/LT side of transformer as per exisiting thickness with necessary cutting, bending making holes incl making sheet in reqd shape alongwith gasket,nut, bolts, washers etc and including painting two coats as per existing painting for transformer, capacity upto 63 to 800 KVA .

Supply and fill in repairs existing breather silca gel of superior quality for transformer breather.

Supply and fix in repairs transparent PVC material breather assembly for transformer upto 800 KVA capacity.

M & L for transformer oil filteration & dehydration by Ultra High Vaccum Double stage machine to remove impurities from oil such as moisture, dirt,air and other gases and to improve BDV upto 50KV at 2.5mm air gap complete all as directed by Engr-in-Charge. (Note: Transformer oil filteration & dehydration by Ultra High Vaccum Double stage machine should be done on existing installation place on same days)

Material and labour for new transformer oil for topping up or for replacement in Transformers /Servo Voltage stabilizer complete all as specified and directed. (Note: Oil shall be in company sealed barrel having BDV not less than 60 KV )

M & L for Servcing of 11 Kv indoor Vacuum Circuit breaker/ compact VCB of any make at Gomantak /Jeevanti /2W DET sub station which includes dicsconnnecting ,removing old grease ,re-greasing of moving parts with recommended grease and checking of the entire breaker trolley mechanism, checking of the closing and tripping time in milli seconds using high precision time scope timer, measurements of contact resistance and insulation values, cleaning the complete VCB by opening front and back doors,tightening of cable connections, checking & repairing the current circuit panel wiring,relay, etc and re-assembling & re-installing the VCB back to its original position including testing and commissioning after completion of work all as required and directed by Engineer-in-Charge.

M & L for Servcing of your 11 Kv indoor Load break switch with Fuses of any make at Gomantak /Jeevanti /2W DET /NAD sub station which includes dicsconnnecting ,removing old grease ,re-greasing of moving parts with recommended grease and checking of the entire load breaker system, checking of the closing and tripping time in milli seconds using high precision time scope timer, measurements of contact resistance and insulation values, cleaning the complete LBS by opening front and back doors,tightening of cable connections, etc and re-assembling & re-installing the LBS back to its original position including testing and commissioning after completion of work all as required and directed by Engineer-in-Charge.

M&L for testing and calibration of 11 KV VCB indoor/ out door type along with control panel and controll wiring , protection system and relays system (relay to tripping coil auxiliary switch male and female housing cut outs etc), checking of quality of vaccum interrupter , insulation resistance, testing( IR Value, Ratio test, Polarity test) and connection verification of 11 KV current transformer(Set of Three) by PRIMERY INJECTION KIT,and testing and calibaration of relay (set of two over current and one earth fault) by SECONDARY INJECTION KIT including all other functional tests of VCB ,C&R panel and CTs, PTs complete all asspecified and as directed.

M & L for Servcing of your 11 KV 4 Way RMU with Fuses of any make at Gomantak sub station which includes dicsconnnecting ,removing old grease ,re-greasing of moving parts with recommended grease and checking of the entire load breaker system, checking of the closing and tripping time in milli seconds using high precision time scope timer, measurements of contact resistance and insulation values, including gas charging, cleaning the complete RMU by opening front and back doors,tightening of cable connections, etc and re-assembling & re-installing the RMU back to its original position including testing and commissioning after completion of work all as required and directed by Engineer-in-Charge.

Supply, Erection of 11kv Bus support insulator cylinderical type with double hole/single hole (as per site requirement) for indoor VCB /LBS/HT busbar Panel including disconnecting & dismantling of faulty bus insulators complete all as directed.

Supply, Erection of 11kv Bus support insulator angular type (as per site requirement) for indoor VCB /LBS including disconnecting & dismantling of faulty bus insulators complete all as directed.

Supply, fixing of space heaters 1000 watts including suitable thermostat for 11 KV VCB including disconnecting & dismantling of faulty one complete all as directed.

Supply, testing & commissioning of Power pack battery bank with battery charger 30 Volt DC output and input 110v AC ,including 100 AH 2 volts DC 15 Nos maintenance free batteries complete with DCDB and ACDB as suitable for 11 KV VCB panel complete all as directed by Engineer-in-Charge.

Dismantling and removing the existing u/s Overcurrent & Earth fault relay of HT VCB panel and Supply and fixing new microprocessor Numerical overcurrent and earth fault relay element with external EF element of VCB, complete all as specified and as directed by the Engineer-In-Charge.

S & F in replacement , testing and commissioning of 11 KV epoxy cast CT for VCB upto 800Amp of capacity 100-50/5-5A class0.2s/5P, insulation class-B, 50Hz,suitable for existing make and model complete all as specified and as directed by the Engineer-In-Charge.

S & F in replacement , testing and commissioning of 11 KV Master trip relay 3NO-2NC for VCB upto 800Amp suitable for existing make and model complete all as specified and as directed by the Engineer-In-Charge.

S & F in replacement , testing and commissioning of 11 KV Potential transformer (PT) type3PH/3L draw out type VTR:11000/110V in door type apoxy rating ,Burden/accuracy-core-1:100VA/CL0.5, Volatge factor:1.1 continuous for VCB upto 800Amp CG make suitable for existing make and model complete all as specified and as directed by the Engineer-In-Charge.

Supply and fix flexible jumpers in GOD, load breaker switches and VCB.

Supply and fix Tripping Neutral switches in VCB.

Supply and fix LED Indicators in VCB/Panel as per existing colour codes.

Supply and fix digital type Ammeter suitable for 11 KV VCB.

Supply and fix digital type voltmeter suitable for 11 KV VCB

Supply and fix mushroom head push turn.

Supply and fix flush head.

S & F in replacement vacuum interrupter type VL 35414C3 suiatble for 11 KV VCB, complete all as specified and as directed by the Engineer-In-Charge.

S & F in replacement vacuum interrupter Vacuum Interruptor Type VG 2 RG AREVA Code.: MVU27S0VG2R00FN complete all as specified and as directed by the Engineer-In-Charge.

S & F in repairs motor charged mechanism assembly UMG-14 with motor & opening coils Code 541/SP for 11 KV VCB all as directed by Engineer-in-Charge.

S & F in repairs big cam with main shaft with bearing & cover code 568/SP1 for 11 KV VCB all as directed.

S & F in repairs Closing coil assembly for 11 KV VCB a code 594/SP1 ll as directed .

S & F in repairs triping coil assembly for 11 KV VCB a code 599/SP1 ll as directed .

Shifting of transformer from one site to another in case of emergency by disconnecting HT/LT cable and Earthing connections of transformer of capacity 300 to 800 KVA , 11 KV/433 volts 3 phase floor mounted incl making all electrical connections at the place of installation complete all as specified and directed. (Note :- (i) The rate for transport and lifting of transformer by crane is deemed to be included in the rate quoted. (ii) The rate is deemed tobe inclusive for disconnection & making connnections of transformer.

Servicing and repair/maintenance of APFC panel Board heavy duty auto/manual operation including repairs/replacement of fuses, fuse link, contactors, current transformers and checking, replacing of defective control wiring if any replacement of defective cable lugs, patch work welding, replacement of defective door hinges including painting with two coat of sythetic enamel paint over one coat of red oxide primer etc and testing and commissioning complete upto 75 KVAR complete all as directed by Engineer-in-Charge.Note : Capacitor /Contactor /MCB will be measured and paid for seaprately.

Supply & Fixing Power Capacitor SQR EHDLL 440V 50HZ-10KVAR 3PH B32459L5010A 11 complete all as directed..

Supply & Fixing Power Capacitor SQR EHDLL 440V 50HZ-5KVAR 3PH B32459L5005A 11 complete all as directed. .

Supply & Fixing Phasecap capacitor 440V 50Hz 15KVAR 3PH B25667L4247A375 complete all as directed.

Supply & Fixing Phasecap capacitor 440V 50Hz 20KVAR 3PH B25667L4347A375 complete all as directed.

Supply & Fixing Capacitor duty contactor suitable for 5 KVAR to 20 KVAR capacitors complete all as directed..

Supply & Fixing MCB TP 40A ,50 HZ complete all as directed..

S & F Power factor Controller suitable upto 75 KVAR APFC Panel complete all as directed.

S & F three phase multimeter for LT Panel checking complete nall as direcetd.

M & L for ACSR conductor on existing poles including dismantling of unsv ACSR conductor and GOD jumpers all as directed and as specified.

Dismantling old cross arms MS clamp and angle from LT/HT pole all as directed by Engr-in-charge.

M&L for cross arm bacing support to clamps and back plate fabricated from slructural steel section like angles channels flat etc including nuts bolts and washers welding bending cold or hot drilling holes for bolts if any shape and size and incl applying two coats of aluminium paint over one coat of red oxide primer and all as directed by Engr-in-charge.

Supply & Fix Heavy gang operated triple pole mechanically operated air break on load disconnecting switch each pole consist of galvanised iron base HT 11KV with polymer insulators per phase non ferrous knife and spring loaded contact GI pipe of adequate length for operation from ground level and operating handle complete in both OFF and ON position capacity 400 Amps including taking down old one Complete all as specified & directed by Eng-in-Charge.

M & L for 11 KV Heavy Drop Out Fuse complete in each pole consist of galvanised iron base HT 11KV with polymer insulators including taking down old one all as specified and directed. Complete all as specified & directed by Eng-in-Charge.

S & F lightening arrestor HT 11000 KV pole mounting with polymeric insulator complete with all fittings transmission class nominal discharge current upto 65 KA including removing the defective one complete all as specified and directed.

Supply & Fix Operating Rod Fibre reinforced plastic Conneted to main GOAB Switch make arrangement Operating from Ground level Complete all as specified & directed by Eng-in-Charge.

M&L for HT 11 KV Disc type insulator with hardware, single disc assembly, polymeric insulator, vitreous145mm high and 255 mm dia and socket type, including taking down old unsv.Complete all as specified & directed by Eng-in-Charge.

S&F for Pin type polymer insulator including one galvanised mild steel spindle two GI washers and one GI iron nut 150mm height, 150mm dia for 11 KV grade including dismantling the old U/S insulator.Complete all as specified & directed by Eng-in-Charge.

Supply and applying petrolium jelly on GOD after removing carbon,dust etc complete all as specified and directed by Engr-in charge

M & L for 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 size 50sqmm to 95 sqmm complete all as directed.

M & L for 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 size 50 sqmm to 95 sqmm complete all as directed.

M & L for Cable jointing kit for 11 KV (Earthed) grade cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 sqmm to 95 sqmm complete all as directed. Note: Necessary earth work is deemed to be included in the rate quoted.

Supply & Fix in repair On load change over switch 250A, 4 pole in sheet metal enclosure complete all as specified and as directed.

Supply & Fix On load change over switch 400A, 4 pole in sheet metal enclosure complete with necessary fixing arrangement all as directed by Engineer-in-charge.

Supply & Fix in repair off load change over switch 400A, 4 pole in sheet metal enclosure complete with necessary fixing arrangement all as directed by Engineer-in-charge.

Supply & Fix in repair MCCB 415V, 50 HZ FP 250 Amps breaking capacity 36 KA ,Ics = 100% of Icu complete all as specified and as directed

Supply & Fix in repair MCCB 415V, 50 HZ FP 400 Amps breaking capacity 36 KA ,Ics = 100% of Icu complete all as specified and as directed

Supply & Fix in repair MCCB 415V, 50 HZ FP 630 Amps breaking capacity 36 KA ,Ics = 100% of Icu complete all as specified and as directed

Supply and fixing Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required 32 x 6 mm copper strip as per directed by Engr-in-Charge.

Supply and fix in repairs test point terminal block made of gun metal 75 mm x 75 mm x 25 mm drilled and screwed including three Nos 8mm dia 25 mm long hexagonal head screws and including provision of suitable MS box made out of 3 mm thick MS sheet to accommodate the terminal block all as directed including removing the old test point complete all as specified and as directed by Engr-in-Charge.

Supply and fix in replacement aluminium strip 25 x 3.15mm fix on porcelin insulator for roof conductor and down conductor above groung level as lightining conductor ( including insulator) for building / store shed all as directed including removing the old strips .

Material and labour for preparation of old painted surface of installation by removing all dirt, dust, grease, oil etc and painting complete surface including connected accessories with one coat of synthetic enamel paint of approved colour by spray including writing of identification SM & MES Nos, capacity etc all as directed by Engineer-in-Charge for following transformers:-

(a) Transformer 315KVA/400 KVA/500KVA/800 KVA

(b) Transformer 63/100/160/200 KVA/250KVA

M&L for Danger notice plate of 1.6mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour and fixed with M.S clamps, bolts and nuts of approved size, for HT , 25 X 20 cm size.

Supply and lay GI tubing 150 mm dia light grade ISI Mark laid in trench/fix on pole/wall as in cable protection including fittings such as bends elbows reducers complete all as specified and as directed

Material and labour for filling and spreading stone aggregate using 40 mm grade trap stone aggregate around 4 pole , 2 pole structure and transformer etc complete all as specified and as directed.

Supply only HT 11KV D.O fuse element 20 Amps Rating (Pack of 10 fuse)

Supply only HT 11KV D.O fuse element 30 Amps Rating (Pack of 10 fuse)

Supply only HT 11KV D.O fuse element 60 Amps Rating (Pack of 10 fuse)

Supply only HT 11KV D.O fuse element 40 Amps Rating (Pack of 10 fuse)

Supply only HT 11KV D.O fuse element 50 Amps Rating (Pack of 10 fuse)

Supply & Fixing Prestressed concrete pole, 11.0 metres long. 152mm x 152mm at top and 152mm x 260mm at bottom, class 9

Excavation in trenches not exceeding 1.5 m width and not exc 1.5 in depth getting out soft disintegrated rock for laying and taking down UG cable of any size

Returning filling in including spreading levelling watering and well ramming in layers not exceeding 25 cm in thick using excavated hard/dense soil.

Removal of surplus soil to a distance not exceeding 50 m and depositing where directed by Engr-in-charge.

M & L for sand cushion in trenches for cable protection complete all as directed and specified.

Supply and lay PCC cable cover class HV, type 1, flat size 300mm x 180mm x 40mm complete all as directed and specified.

M&L for plain cement concrete (1:3:6) Type C-2 (using 40 mm graded coarse aggregate) in foundations, filling and mass concrete including necessary form work complete all as specified and directed.

Supply and laying HT XLPE cable insulated , screened, PVC bedded , galvanised steel strip armoured, electric power cable (Heavy duty) with aluminium conductor, cross sectional area 95 Sqmm 3 core 11KV grade, complete all as directed by Engr-in-Charge.

M & L for detection of fault through fault locating high voltage mobile machine to locate the fault in 11 KV HT /LT cable by giving high voltage surge and to find out excact location of fault all as specified & directed. Note : Excavation and earth work will be measured and paid for searately in respective item of sch.

Supply & laying synthetic rubber insulated mats 2 mm thick fof voltage upto 3.3 KV for electrical purpose suitable for electric shock safety of sizes 2mx1m as specified and directed.

Supply & laying synthetic rubber insulated mats 2.5 mm thick fof voltage upto 11KV for electrical purpose suitable for electric shock safety of sizes 2mx1m as specified and directed.

M & L for attending of emergency break down complaint of VCB/LBS/RMU complete all as specified and as directed.

S& F in replacement of 3 core copper conductor 6sqmm PVC cable for using clamps/cable tie complete all as directed and specified.

S& F in replacement of 3 core copper conductor 10 sqmm PVC cable for using clamps/cable tie complete all as directed and specified.

M&L for Providing precast cement concrete Type C1 1:3:6 (20mm graded aggregate) Set in cement mortar 1:4 in copings and setting in mortar complete with joints to match complete all as specified and directed.

M & L and servicing of 2 and 4 pole structure and preparation of new aluminium painted external surfaces of HT 2/4 pole structure cosisting of cross arms, GOD assy with pipe,DO fuse assy,clamps etc all as specified and directed.

S& F in replacement of MCX 41 Contactor 2NO+2NC,four pole power contactor 325 Amp with all speders and nut bolts complete all as specified and directed.

Supply only 11 KV electrical hand gloves rubber full fingered type,seamless soft & flexible complete all as specified and directed.

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