REPAIR/MAINT OF VARIOUS TRANSFORMERS, GODs, 2 POLE / 4 POLE STRUCTURES AND CONNECTED ITEMS IN OMQ/SMQ AREA AT AF STN HASIMARA 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 400 KVA (step up or down) 11 KV / 433 Volt installed at various location in OMQ/SMQ 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 paid seperately in respective items.

All as per Item no 01.00 above but for capacity 250 KVA capacity complete all as specified and directed.

All as per Item no 01.00 above but for capacity 100 to 200 KVA capacity complete all as specified and directed.

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 complete all as specified and directed.

All as per item No. 4.01 above but capacity ranging 250 KVA complete all as specified and directed.

All as per item No. 4.01 above but capacity ranging 315 to 400 KVA complete all as specified and directed.

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

All as per item No 4.04 above but capacity 250 KVA complete all as specified and directed.

All as per item No. 4.04 above but capacity ranging 315 to 400 KVA complete all as specified and directed.

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 complete all as specified and directed.

All as per item No 4.07 above but capacity 250 KVA complete all as specified and directed.

All as per item No 4.07 above but capacity ranging form 315 KVA to 400 KVA complete all as specified and directed.

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 complete all as specified and directed.

All as per item No. 4.10 above but capacity 250 KVA complete all as specified and directed.

All as per item No. 4.10 above but capacity ranging from 315 KVA to 400 KVA complete all as specified and directed.

S&F breather assembly for transformer of capacity 25 KVA to 200 KVA including taking down unserviceable one complete all as specified and directed.

S&F breather assembly for transformer of capacity 250 KVA to 400 KVA including taking down unserviceable one complete all as specified and directed.

Supply and filling silica gel in breather assembly of 50 KVA to 400 KVA capacity transformer complete all as specified and directed.

Dehydration and filteration of transformer oil from Transformer (s) and auto transformer Voltage stabilizer (LT /HT) 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 directed.

Supply and filling up transformer oil (Grade 'B') for topping up in Transformer (s) and auto transformer Voltage stabilizer LT /HT) 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 directed. Make:- GULF/INDIAN/OIL/HP or any equivalent make as approved by GE.

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 directed.

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 directed.

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 Al conductor cable of size 50 sqmm to 95 sqmm complete all as specified and directed.

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 All conductor cable of size 120 sqmm complete all as specified and directed.

S&F 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 armored Al conductor cable of size 50 sqmm to 95 sqmm complete all as specified and directed.

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 Al conductor cable of size 120 sqmm to 185 sqmm complete all as specified and directed.

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 Al conductor cable of size 50 sqmm to 95 sqmm complete all as specified and directed.

Excavation in trenches n.exc 1.5M wide and n.exc 1.5 M in depth for HT UG cable/pole/stay etc on plan and n.exc 1.5 M in depth and getting out in soft/loose soil complete all as specified and directed.

Returning filling in including spreading leveling watering and well ramming in layers n.exc 25cm thick in Soft/loose soil complete all as specified and directed.

Removing excavated material (soil) to a distance n.exc 50 M and depositing where directed at a level n.exc 1.5m above the starting point complete all as specified and directed.

M&L clean and dry sand (unwashed) in trenches around the cable for cushioning/ lay in existing cable trench complete all as specified and directed. Note:- Sand cushioning for cable : 8cm before laying the cable and 15cm after laying the cable & punned down 18cm, and punned thickness shall be measured and paid.

Supply and laying of reinforced precast concrete cable cover, class EHV, type 2 with peak, size 450mm x 230mm x 50mm complete all as specified & directed.

M&L for Horizontal boring under the road below 2 mtr from the road surface and dia of hole not exc 200mm, with out damaging the existing road, getting out and disposal of soil to a distance not exceeding 50m from the site of work complete all as specified and directed.

M&L for GI pipe light grade of size 80mm dia laying in trenches/ under floor/on walls for protection of UG cables complete all as specified and directed.

M&L for cement concrete (1:2:4) type B-1 using 20mm graded crushed stone aggregate as in coping of pole filling and mass concrete complete all as specified and directed.

Supply and laying 11000 Volts earthed grade heavy duty XLPE cable with aluminium conductor served with an inner sheathing of PVC tape armoured with galvanized steel wire or strip and over all PVC sheathed of size 95 Sqmm 3 core stranded aluminium conductor complete all as specified and directed.

M&L for earthing complete with galvanised steel earth plate electrode 600x600x6mm thick, burried direcdtly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground, level, connected to galvanised iron strip 32x6 mm as earhing lead by means of bolts, nuts, check nudts and washers of galvanised iron or steel all as shown in electrical plate No. 3 connected to earthing test point/equipment all as specified or indicated including testing on completion. Note:- PCC earth pit & CI cover as per SSR Pt-I (2009) electrical plate No 3 are deemed to be included in quoted rate.

S&F galvanised iron strip 32x6 mm as earhing lead by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as connected to earthing test point/equipment complete all as specified and directed.

M&L for danger notice plate of size 25x20cm size thick mild steel sheet,vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour and fixed with MS clamps, bolts and nuts complete all as specified and directed.

M&L Complete servicing of 11 KV 3/4 Way SF6 RMU 630A including dis-assembling of operating mechanism parts, spring, charging motor and mechanism well cleaning with petrol and 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 on control wiring 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 of SF6 gas & generating of test report by OEM/ WBSEDCL Siliguri Zonal testing agency / any specialised agency having experience in the field complete all as specified and directed. Note:- Rate for calibration of relay will be measured and paid seperately.

M&L for servicing, testing and replacement of damaged parts B including callibration of accessories, relays, control wiring and other related work of VCB, RMU, and Bus coupler complete all as specified and directed. Note:- Rates for minor damaged parts will be included in the quoted rates and major spare parts will be measured and paid seperately under respective items of schedule.

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 Panel, RMU, 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.

Caliberation, servicing and testing Micro process relay any make and type from authorised technician for earth fault (EFHS & EFLS) with time, over current (OCHS & OCLS) with time, In-rush current, and other parameters with connected CTS at site by giving artificial load and setting as per reqd load & time delay in RMU/VCB panels 11000 Volts including submitting testing report from main incoming to end of each feeder complete all as specified and directed.

Supply and replacement of Indoor type dual core current transformer single phase suitabe for 11000 Volt with CTR 100 50/5-5 or lower having protection class 5P-10, burden of 15VA and metering core class 1.0 and burden of 15 VA as per existing complete all as specified and directed.

S&F spring charge motor single phase 110/230 Volt AC suitable for Indoor type existing make / Capacity of VCB as per site including control wiring complete all as specified and directed.

S&F LED indicating lamps AC 240V, 3 Phase with holder for main supply indication RYB & taking down old u/s, complete all as specified and directed.

S&F LED indicating lamps DC 30V/110 V 3 Phase with holder for main supply indication RYB & taking down old u/s, complete all as specified and directed.

S&F barrel fuse suitable for potential transformer (11KV / 110 Volt) complete all as specified and directed.

M&L for spary painting of VCB with approved anti-rust colour over a coat of primer coat including sealing of joints to prevent moisture and writing identification mark of feeder complete all as specified and directed.

M&L for replacement of right angle boot 3 Core 25-240 Sq mm 3 Core 11KV/22KV/33KV (E) cold type complete all as specified and directed.

Supply only Local / remote / off Switch 6 Amp Stay Put-Lever type Lock with 2-Local & 2-Remote contact as per site requirement of any make VCB complete all as specified and directed.

Supply only Breaker control switches with Spring Return + Seq. Locking Pistol Grip Handle lock with 1-Trip & 1-Close 25 Amp contactas per site requirement complete all as specified and directed.

Supply only pla relay PCB MOUNT TYPE RELAYS 6 Amps Resistive @ 12/24 VDC/240 VAC complete as per cat part No PCB 3C 12D of Make: Pla components or equivalent complete all as specified and directed.

Supply only HT 11 KV grade Epoxy housing for vaccume interupter bottle as per site requirement of any make VCB complete all as specified and directed.

Supply only HT 11 KV grade Vaccume interrupter VG-2 as per site requirement of any make VCB complete all as specified and directed.

Supply only Trip coil release coil 110V DC (without bracket) as per site requirement of any make VCB complete all as specified and directed.

Supply only Power pack 220 Volt AC & 110Volt / 30 Volt DC with 30 Min backup including control wiring as per site requirement of any make VCB complete all as specified and directed.

Supply only Auxiliary relay single phase 230V AC,as per site requirement of any make VCB complete all as specified and directed.

Supply only Master Trip relay 24/110V single phase as per site requirement of any make VCB complete all as specified and directed.

S&F in replacement electronic hooter size 96 x 96 mm panel mounted, input voltage 12, 24 VDC/48-260 V AC/DC, frequency 50Hz, industrial type including connecting wire as per existing complete all as specified and directed. Note:- All Spare parts of VCB/ RMU should be of existing make / Supplied by Authorised OEM service partner of suitable rating / size as per site requirement.

S&F lightening arrestor high tension, 11 KV expulsion type complete with all fitting, transmission class, discharge capacity 65 kilo amps.including all clamps, nuts, bolts, washers and connecting to existing GI earth wire/strip and 11 KV system (OH line) complete all as specified and directed.

Supply and install HT 11 KV outdoor type triple pole gang operated air-break switch with DO fuse assembly for R, Y and B mounted on Post insulator and steel frame with operating mechanisem worked from ground level for current rating 200 Amp having 09 Nos post insulators for GOD complete all as specified and directed. Make:- Jaypuria/Rastriya/Pactil/Atlas

M&L for preparation of old rusted of Transformer denting and painting of capacity exceeding 200 KVA and upto 400 KVA any size and applying one coat of primer red-oxide and two coat of synthetic enamel paint with the help of spreay machine except the machine details area and re-writing Transformer description, MES Number etc complete all as specified and directed. Note:- Synthetic enamel paint colour will be as per existing colour or decided by the Engineer-in-Charge.

M&L for preparation of old rusted of Transformer denting and painting of capacity up to 200 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 complete all as specified and directed. Note:- Synthetic enamel paint colour will be as per existing colour or decided by the Engineer-in-Charge.

M&L for painting of 3 or 4 pole structure after removing existing paiting from poles and applying one coat of primer red-oxide and two coat of synthetic enamel paint with the help of spreay machine on poles and angle iron structure of 3 or 4 pole structure and re-writing the incoming and out going cable/ feeding location on Name plate complete all as specified and directed. Note:- Synthetic enamel paint colour will be as per existing colour or decided by the Engineer-in-Charge.

S&F Disc type insulator with tension clamps for conductor of working Voltage 11 KV complete all as specified and directed.

Brahmaputra Engineering Services (BID ID -3208009)

M/S SARKAR ELECTRIC (BID ID -3219376)