REPAIR/MAINT OF TRANSFORMER AND OTHER CONNECTED WORKS IN DOMESTIC AREA, REPAIR / COMPREHENSIVE MAINT OF 33/11 KV MAIN RECEIVNG SUB STATION AND CONNECTED WORKS UNDER GE (AF) HASIMARA.

Amount

Note 1:- (Applicable for all parts/items) : The biidders/contractors are advised to read tender documents & all corrigendum/amendments and general condition of contracts before entry/quoting the rates. Note 2:- Attention to bidder is hereby invited to upload revised BOQ if published during their bid submission. Uploading of incorrect/ pre-revised BOQ shall be treated as non bonafide and rejected. Fixed credit has been given in technical documents which shall be taken into account during acceptance of bid/tender.

M & L for Repair / servicing of transformer in situ of any make, any type, any capacity 315 KVA to 500 KVA capacity (step up or down) installed at various location in Tech area comprising with the following works :- a) Taking out transformer oil upto required level and keeping in empty container with safe custody for re-use after Dehydration. b) Opening of top cover of transformer and keeping aside and re-fixing the same after tightening of all LT and HT terminal joints (both inside and out side of transformer) including S&F of all gasket of bushing (6 mm thick rubberized cork sheet) to make leak proof. c) Checking of tap changing switch connections and tightening and soldering properly for smooth functioning. d) Cleaning of LT and HT Bushing, Replacement of burnt out bushing stud made out of brass, washer, nut, porcelain bushing of existing size, terminals, oil indication glass of conservator, top gasket and drain valve etc as directed by the Engineer-in-Charge. e) Cleaning of oil tank of transformer, conservator, core, vent pipes, cooling pipe / fins by desludging, decarbonizing and finally washing with transformer oil and drying complete. f) Filling up the transformer with existing taken out transformer oil carefully.

g) Dehydration and filteration of transformer oil from Transformer (s) to achieve di-electric strength not less than 40 KV on 4mm over gap for a period of one minute and testing of acidity of oil and dielectric strength (before and after dehydration / filtration) complete all as specified and as directed by the Engineer-in-Charge. h) Top up new transformer oil upto desired level. Note : i) Replacement of unserviceable bushing (HT/LT) and terminals shall be measured and paid separately under respective item, under respective items. ii) New transformer oil shall be measured separately under respective items. iii) Any minor parts such as gasket, nuts, bolts, washers etc that are required to be replaced for satisfactory repair shall be provided by the contractor and rate for the same shall be deemed to be included with the unit rate. iv) Cost for dehydration and filteration of transformer oil shall be shall be deemed to be included with the unit rate.

All asper Item no 01.00 above but for capacity 100 to 250 KVA capacity

Taking down burnt out transformer of capacity 75 to 160 KVA by disconnecting all cable connection and carrying to work shop for repair and following jobs including all as mentioned in item no-1 and reassembling the transformer after necessary repairs complete all as directed :- a) Dismantling of transformer complete (part by part) without damaging any parts / winding / core and setting aside for inspection of the Engineer-in-Charge including de-canning of transformer oil and keeping in empty barrel. b) Repair / re-winding of HT/LT coils by replacing burnt / worn out part / coil as per the existing size of aluminium/copper wire / strip as required. c) Carrying the transformer from workshop to site and setting in position including connecting all cables (HT/LT) and commissioning and testing with connected load complete. Note : (i) Winding of HT/LT coils shall be measured and paid separately. ii) New Transformer oil shall be measured and paid separately. iii) In case HT/LT bushing and stud required replacement, the same shall be measured and paid separately against respective items of Sch ‘A’ iv) Complete gasket set shall be replaced by the contractor and rate for the same shall be deemed to be included with the unit rate.

v) Any minor parts such as nuts, bolts, washers etc those are required to be replaced for satisfactory repair but are not covered under Sch ‘A’ are to be supplied by the Contractor and rate for the same shall also be deemed to be included with the unit rate.

All as per item No 03.00 above but capacity of transformer 200 to 250 KVA

All as per item No 03.00 above but capacity of transformer 315 to 500 KVA

Supply only following items to incorporate against different items of Sch ‘A’ (Fixing charges are deemed to be included with connected Sch ‘A’ items where the parts are required to replace :-

Supply only HT porcelain bush set 11 KV for out door transformer of any size as per site requirement of capacity ranging from 25 KVA to 200 KVA

All as per item No. 6.01 above but capacity ranging from 250 KVA to 500 KVA.

Supply only LT termination porcelain bush of outdoor / indoor transformer of capacity ranging from 25 KVA to 200 KVA as per site requirement.

All as per item No 6.03 above but capacity ranging from 250 KVA to 500 KVA

Supply only HT 11 KV terminals stud with nuts, washers made out of brass of suitable size as per site requirement for transformer ranging from 25 KVA to 200 KVA

All as per item No 6.05 above but capacity ranging form 250 KVA 500 KVA

Supply only LT terminals stud made out of brass with nut and washer, suitable for transformer of capacity ranging from 25 KVA to 200 KVA.

All as per item No.6.07 above but capacity ranging from 250 KVA to 500 KVA.

S&F temperature gauge dial type matching with the existing system of transformer including taking down unserviceable one all as specified and directed by the Engineer-in-Charge.

S&F breather transparent assembly for transformer of capacity 25 KVA to 200 KVA including taking down unserviceable one all as specified and directed by the Engineer-in-Charge.

S&F breather transparent assembly for transformer of capacity 250 KVA to 500 KVA including taking down unserviceable one all as specified and directed by the Engineer-in-Charge

Supply and filling dry silica gel in breather assembly of 50 KVA to 500 KVA capacity transformer all as specified and directed by the Engineer-in-Charge.

Dehydration and filteration of transformer oil from Transformer (s) and Oil Circuit Breaker (s), installed at various Sub Station (s) to achieve di-electric strength not less than 40 KV on 4mm over gap for a period of one minute and testing of acidity of oil and dielectric strength (before and after dehydration / filtration) complete all as specified and as directed by the Engineer-in-Charge.

Supply and filling up transformer oil (Grade ‘B’) for topping up in existing transformer and Oil Circuit Breaker, installed at various Sub Station , having Di-electric strength not less than 40 KV on 4mm over gap for a period of one minute complete all as specified and as directed by the Engineer-in-Charge. Make : GULF/INDIAN/OIL/HP

Supply and winding of HV/LV coil of 11KV/433 Volt Transformer complete wounded with supper enamel insulated Copper conductor ISI marked of guage as per existing, suitable for transformer of capacity up to 750 KVA complete all as specified and as directed by the Engineer-in-Charge. Note: cost of taking down burnt out transformer of capacityup to 750 KVA by disconnecting all cable connection and carrying to work shop for repair measured and paid in repsctive item in Shedule above.

S&F in repair gate valve made of brass (heavy duty) both end threaded with wheel of size 20 mm complete all as specified and as directed by the Engineer-in-Charge.

S&F in repair gate valve made of brass (heavy duty) both end threaded with wheel of size 25 mm complete all as specified and as directed by the Engineer-in-Charge.

M&L for preparation of old rusted of Transformer denting and painting of capacity up to 315 KVA any size and applying one coat of primer red-oxide and two coat of synthetic enamel paint with the help of spreay machine and re-writing Transformer description, MES Number etc all as specified and as directed by the Engineer-in-charge. Note :- Synthetic enamel paint colour will be as per existing colour or decided by the Engineer-in-Charge.

S&F 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 armored AI conductor cable of size 50 Sq mm to 95 sqmm complete all as specified and as directed by the Engineer-in-Charge.

S&F 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 armored AI conductor cable of size 120 to 185 sq mm complete all as specified and as directed by the Engineer-in-Charge.

S&F cable jointing kit for 11 KV(Earthed) grade cable for outdoor termination heat shrink type joint joint complete with jointing material and accessories suitable for 3 core XLPE armored AI conductor cable of size 50 Sq mm to 95 sqmm complete all as specified and as directed by the Engineer-in-Charge.

S&F cable jointing kit for 11 KV(Earthed) grade cable for outdoor termination heat shrink type joint type joint complete with jointing material and accessories suitable for 3 core XLPE armored AI conductor cable of size 120 sqmm complete all as specified and as directed by the Engineer-in-Charge.

S&F cable jointing kit for 11 KV(Earthed) grade cable for outdoor straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armored AI conductor cable of size 50 Sq mm to 95 sqmm.

M&L XLPE insulated, armoured heavy duty electric cable with aluminium conductor, 11000 volts grade, cross- sectional area 95 sqmm 3 core complete all as specified and as directed by the Engineer-in-Charge. ( Note: Cable shall be layed in existing Cable duct /Trench)

Excavation in trenches not exceeding 1.5 metre wide and not exc 1.5 metre in depth for foundation of pole / stay, or cable trenches and getting out in soft/loose soil complete all as specified and as directed by the Engineer in charge

Returning filling in including spreading, leveling watering and well ramming in layers not exceeding 25 cm in soft loose soil complete all as specified and as directed by the Engineer in charge

Removing excavated materials to a distance not exceeding 50 mtr and depositing where directed at a level not exceeding 1.5 metre above the starting point complete all as specified and as directed by the Engineer-in-Charge.

Supply and laying double walled corrugated (DWC) HDPE duct pipe of 100mm dia. conforming to IS, approved colour complete with fittings for cable protection complete all as specified and as directed by the Engineer-in-Charge.

M&L galvanized iron tubing 100 mm bore (light grade) with all fittings for protection of cables, laid in trenches complete all as specified and as directed by the Engineer-in-Charge. (Note : Excavation and earth work will be measured and paid separately ) (Make : TATA / JINDAL / PRAKASH)

S & L quarry medium sand for cushioning for cable protection in trenches 8 cm before laying cable and 15 cm deep over the cable complete all as specified and as directed by the Engineer-in-Charge. ( Note: Punned thickness shall be taken for measurement)

M & L Lifting the existing precast cement concrete cable cover/Serviceble bricks bricks obtained during excavation of existing cable and laying the same covers, in trenches for cable protection, complete all as specified and as directed by the Engineer-in -charge.

M&L Complete servicing of 33 KV VCB (Make : Schneider) including dis-assembling of operating mechanism parts, spring, charging motor and mechanism well cleaning with thinner or any solvent as recommended by OEM and/or CRC 226, replacement unserviceable parts/accessories, oiling and greasing of moving parts, checking and cleaning of bus bar insulator, checking of vacuum, interrupters, well cleaning of mechanism linkages drive insulators and fiber reinforced plastic frame around the vacuum interrupters, cleaning of terminal of 3 Nos current transformer, 3 Nos potential transformer indoor type, replacement of burnt out fuse, tightening of all connection, reinsulating of burnt out bus bar with HVBT tape as and re-assembling the VCB after servicing and testing of complete VCB for its serviceability, functionality, setting of Earth Fault over current relay (Make Schneider), Master trip relay (Make : Alstom), Auxiliary Relay (Make : Alstom), closing/tripping remote operation, auto charge operation, emergency stop function, Mechanical operation, interlocks, Annunciator operation, WTI/OTI relay function etc & generating of test report of the complete panel incl all relays (IR Test, continuity test, tripping test of earth fault and over current of panel, contact resistance test, CT Ration and core identification test, PT IR Value and polarity test ) by OEM / WBSEDCL Siliguri Zonal Testing/ any specialised agency having experience in the field complete all as specified and directed.

M&L Complete servicing of 11 KV 8 Way SF6 RMU 630A (Make : Lucy Electric) including dis-assembling of operating mechanism parts, spring, charging motor and mechanism well cleaning with thinner or any solvent as recommended by OEM and/or CRC 226, replacement unserviceable parts/accessories, oiling and greasing of moving parts, checking and cleaning of bus bar insulator, checking of vacuum, interrupters, well cleaning mechanism linkages drive insulators and fibber reinforced plastic frame around the vacuum interrupters, cleaning of terminal of 3 Nos current transformer, replacement of burnt out fuse, tightening of all connection, tapping of burt out bus bar with HVBT tape as and re-assembling the RMU after overhauling and testing of complete RMU for its serviceability, functionality, setting of Earth Fault over current relay (Make Ashida, ADR 241S), Master trip relay (Make : Alstom), Fuse fail relay (Make : Alstom), functioning of closing/tripping remote operation, auto charge operation, emergency stop function, Mechanical operation, interlocks, Checking and topping up of SF6 gas & generating of test report of complete panel and relays by by OEM/ WBSEDCL Siliguri Zonal testing agency / any specialised agency having experience in the field complete all as specified and directed by Engineer-in-Charge.

M&L servicing of Battery bank 110 Volt including checking functionality of PCB, Automatic float (40 amps) & boost (18 amps) battery charging unit suitable for 110 volt 150 AH lead acid battery, all electronic parts, battery terminal, outgoing connection of VCB, RMU, OLTC Panel, auto operation of Isolator including replacement of minor defective parts of battery bank & battery like PCB, indicator, MCB, HRC Fuse, fuse carrier, connecting cable, control cable etc to make it functional properly complete all as specified and directed.

Servicing and repairing of 33 KV isolator including cleaning of complete moving & fixed contacts and apply petroleum jelly on contacts, oiling greasing of operating mechanism auto / mannual function, tightening connections replacement of unserviceable parts, reassembling the isolator after repair and testing complete all as specified and directed.

M&L for aluminium conductor steel reinforced (ACSR) DOG as over head, conductor for connectiong 33 KV equipment/33 KV distribution system with necessary connection with PG clamp and Jumpers of suitable size complete including dismatling existing complete all as specified and as directed by the Engineer-in-Charge.

S&F in replacement 33 KV Disc insulator 3 in series with tension clamp for connductor complete all as specified and directed.

S&F in replacement of 33 kV Line Post Insulator Polymeric size 170mm X 376mm, Tensile strength : 10 kN, Creepage distance 900 mm, Dry Low Frequency Flashover Voltage : 90KV, Wet Low Frequency Flashover Voltage : 50 KV, complete all as specified and directed.

M&L for lightening arrestor non - linear reistor type line discharge class-3, nominal discharge current 10 KA and high current with stand 100 KA asssembly suitable for 33 KV including all clamps, nuts and bolts, washers & connection to earth with 32 x 6 mm GI strip its connection with lightning arrestor from earthing pit and as well as with 33 KV line including supply and installation of jumper connection as required (for outgoing) (one per phase) complete all as specified and as directed by the Engineer-in-Charge. Make : OBLUM/GE ALPRO/Jaipuria Brothers

S&F of breaker charging motor 220 Volt AC suitable for 33 KV VCB Panel including control wiring complete compatible as per existing in specifications and dimensions complete all as specified and as directed by the Engineer-in-Charge.

Testing and callibration of feeder protection microprocessor based (OC & EF) relay 11 KV by secondary injection and generating report by authorised testing agency complete all as specified and directed.

Testing and callibration of feeder protection microprocessor based (OC & EF) relay 33 KV by secondary injection and generating report by authorised testing agency complete all as specified and directed.

S&F of space/ strip heater including control wiring with fiber glass protected wire and connected to thermostat compatible as per existing in specifications and dimensions complete all as specified and as directed by the Engineer-in-Charge.

Supply, fixing and testing 33 KV HT ceramic bushing of transformer 5 MVA (33/11 KV) capacity compatible as per existing in specifications and dimensions all as specified and directed including taking down old bushing complete all as specified and as directed by the Engineer-in-Charge.

Supply, fixing and testing 33 KV HT bushing rod of brass both ends threaded including nut, check nut and washer of transformer 5 MVA (33/11 KV) capacity compatible as per existing in specifications and dimensions all as specified and directed including taking down old bushing rod complete all as specified and as directed by the Engineer-in-Charge.

S&F TNC Switch compatible as per existing in specifications and dimensions complete all as specified and as directed by the Engineer-in-Charge.

Supply only Trip coil 110V DC with control wiring compatible as per existing in specifications and dimensions complete all as specified and as directed by the Engineer-in-Charge.

Supply only Release coil 110V DC with control wiring compatible as per existing in specifications and dimensions all as specified and directed.

Supply only Indicating lamp 110V DC compatible as per existing in specifications and dimensions all as specified and directed.

S&F cable jointing kit single core for 33 KV grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for single core XLPE armoured Al conductor cable of size 120 sq mm complete all as specified and directed. Make: Raychem, 3M

S&F cable jointing kit single core for 33 KV grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for single core XLPE armoured Al conductor cable of size 120 sq mm complete all as specified and directed. Make: Raychem, 3M

Aluminum pipe bus for 33 KV size 1.5" as per dimension laid down in IS : 2673 complete all as specified and directed.

33 KV stack type (22 KV grade) 2 unit / stack basis normal duty insulator suitabale for 33 KV Distribution system complete all as specified and directed.

M&L for painting to HT 33 KV grid steel structure including all MS channels, angles, clamps etc with one coat of synthetic enameled paint after proper surface preparation complete all as specified and directed. Note:- Rate include all steel structure/ supporting frame for 33/11KV Circuit Breakers, CTs, PT and lightening arrestor installed from taking over point of WBSEDCL to power transformer at 33 KV yard.

Supply and replacement of cable 1.5 sqmm 16 core armoured, heavy duty control cable complete with fixing arrangment in duct complete all as specified and directed.

M&L for Earthing complete with galvanized steel earth plate electrode 60 cm X 60 cm X 6 mm thick buried directly in ground (earth pit not less than 2.25 mtr deep below normal ground level) with top edge of plate not less than 1.5 mtr below ground level connecting to the GI strip 32 x 6mm, by means nut bolt, nuts, check nuts and washer of the GI Earth wire protected by provision of GI medium grade pipe 40 mm incl provision of concrete pit in PCC (1:2:4) type B-1 using 20 mm graded stone aggregated with 40 mm thick cover with RCC (1:2:4) reinforced with XPM (weight not less than 4 Kg / Sqm) and frame of angle iron 25mm X 25 mm X 3mm with lugs 2 Nos and with 6 mm dia MS bar handle made to shape, GI medium grade 20 mm bore pipe for watering perforated at bottom 1.75 mtr long placed on top edge of earth plate, common salt, Bentonite and charcoal filling, test point made out of phosphorus bronze size 75x75x25mm, drilled and screwed including 3 nos. 8mm dia 25mm longwith fixing arrangement, funnel, wire mesh and earth work in hard/dense soil, returning filling in and removal of surplus soil to a distance not exceeding than 50 mtr, all as per electric plate No 3 of SSR Part I 2009 and connection to earth test point all as specified incl testing on completion”.

M/S AHUJA TRADING