REPAIR/ REPLACEMENT OF TRANSFORMER OIL, GOD AND OTHER MAINT WORK AT AF STATION HASIMARA UNDER GE (AF) HASIMARA

Amount

Note 1: (Applicable for all parts/items) : The bidders/ contractors are advised to read tender document, all drawings & 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.

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.

Supply and filling up transformer oil (Grade ‘B’) in Transformer (s) and Oil Circuit Breaker (s), installed at various Sub Station (s), 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. Make : GULF/INDIAN/OIL/HP

Taking out/ burnt out coil from transformer of capacity 75 KVA to 250 KVA and rewinding the same with DPC copper wire of existing gauge and weight with insulating materials for HT coil of approved quality all as specified and directed.

Taking out/ burnt out coil from transformer of capacity 75 KVA to 250 KVA and rewinding the same with DPC copper wire of existing gauge and weight with insulating materials for LT coil of approved quality all as specified and directed.

Supply and fixing temperature gauge matching with the existing system of transformer including taking down unserviceable one all as specified and directed.

Supply and fixing breather assembly for transformer of capacity 25 KVA to 200 KVA including taking down unserviceable one all as specified and directed.

Supply and fixing breather assembly for transformer of capacity 250 KVA to 500 KVA including taking down unserviceable one all as specified and directed.

Supply and filling silica gel in breather assembly of 50 KVA to 500 KVA capacity transformer all as specified and directed.

Supply and fixing in repair gate valve made of brass (heavy duty) both end threaded with wheel of size 20 mm complete all as specified and directed.

Supply and fixing in repair gate valve made of brass (heavy duty) both end threaded with wheel of size 25 mm complete all as specified and directed.

Supply and fixing in repair LT terminals stud with nuts, washers made out of copper / brass of suitable size as per site requirement for transformer ranging form 25 KVA to 200 KVA complete all as specified and directed.

Supply and fixing in repair HT terminals stud with nuts, washers made out of copper/ brass of suitable size as per requirement for transformer ranging form 25 KVA to 200 KVA 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 light 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 light grade 20 mm bore pipe for watering perforated at bottom 1.75 mtr long placed on top edge of earth plate, common salt and charcoal filling, test point made out of phosphorus bronze with 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 and taking down old earthing”.

All as per item No. 14.00 above but using copper sulphate in lieu of common salt complete all as specified and directed.

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

Material & Labour for preparation of old rusted Transformer by denting and painting of any size and applying one coat of primer red-oxide and two coats of synthetic enamel paint with the help of spray machine and re-writing Transformer description all as specified and as directed. Note :- Synthetic enamel paint colour will be as per existing colour or decided by the Engineer-in-Charge.

Supply and fixing porcelain vitreous white/ brown/ green spacers insulator of size 75mmx35mmx40mm height complete with one number galvanized iron stud bolts 6mm dia x 40mm long including nuts & washers and two number galvanized iron fixing bolts of size 6mm dia and 50 mm long including washers and drilling holes for holding / fixing aluminium strip/ roof conductor as required including testing on completion complete all as specified and as directed.

S&F cable jointing kit for 11 KV(Earthed) grade cable for indoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured AI 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 cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured AI 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 straight through cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured AI conductor cable of size 50 Sqmm to 95 sqmm complete all as specified and directed.

M & L for overhauling GOD set by replacing stationary and removing contacts adjusting from the ground level for smooth operation by replacing flexible copper strips, nuts, bolts, washers, GI pipe handles all as specified and directed. Note : Stationary moving contacts post insulators GI Pipe and handle shall be measured and paid separately.

Supply only GOD handle with locking strip and insulation sleeves complete all as specified and directed.

Supply only GI Pipe 25mm dia medium grade 6m in length complete all as specified and directed.

Supply only stationary and moving contacts set for GOD complete all specified and directed.

Supply and fixing post insulator 11 KV for GOD complete all as specified and directed.

M&L for triple pole, mechanically operated, mounted on insulator and steel frame with operating mechanism worked from ground level, having current rating upto 400 amps for working pressure 11000 volts with drop out type fuses three numbers after dismantling of existing air break switch all as specified and as directed.

Supply & Fixing Cross Arms bracings, supports, clamps and back plates febricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilled 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 complete all as specified and directed.

Supply and fixing in repair HT Joint Box factory made CPRI approved made out of 3.15mm thick MS sheet on angle iron framing 25X25X5 mm MS with cannopy on top spread out 15 cm from top, HT resin cast moulded bushing fitted on 12 mm glass fiber inside top plate suitable for 11KV with 3 Nos aluminium bus bar 400 amp current capacity separeted with fire retardent sepretor, duly powder coated, painted externaly and internaly of size 1.0X1.5X1.0 metre including all cable jointing nuts, bolts made of brass/ HS steel of sutable size and PCC for grouting of Joint Box to be fixed 01 feet height from ground level all as specified and directed.

Repair / servicing of Isolation transformer capacity upto 10 KVA in situ of any make and any type installed at various location complete all as specified and as directed.

M&L for taking down all 11 KV HT connection from the existing VCB panel, any type and dismantling all diffective or malfunctioning parts carefully for repair/ replacement complete all as specified and directed.

M&L for reassembling all the spare parts dismantled against item No. 31.00 and new spares replaced against defects including readjustment of functionality and operation of VCB panel and connection of existing HT cable complete all as specified and directed. Note : All Spares will be measured and paid seperately under relevent items.

M&L for caliberation of relay setting, tripping current setting, operation time setting, earth fault caliberation with respect to other relays connected in same network complete all as specified and directed. Note : T&P charges for caliberation and testing deamed to be included in quoted rate.

Supply only TNC Switch as per sample for "Schneider", "Areva" and "Andrew yule" make VCB complete all as specified and directed.

Supply only Pla relay with base (round pin) as per sample for "Schneider" make VCB complete all as specified and directed.

Supply only Pla relay with base (flat pin) as per sample for "Schneider" make VCB complete all as specified and directed.

Supply only Over current earth fault relay as per sample for "Schneider" make VCB complete all as specified and directed.

Supply only HT 11 KV grade Epoxy housing for vaccume interrupter bottle as per sample for "Schneider" make VCB complete all as specified and directed.

Supply only HT 11 KV grade Vaccum interrupter VG-2 as per sample for "Schneider" make VCB complete all as specified and directed.

Supply only Digital Volt meter as per sample for "Schneider" and "Areva" make VCB complete all as specified and directed.

Supply only Digital Amp meter as per sample for "Schneider" and "Areva" make VCB complete all as specified and directed.

Supply only Micon Meter as per sample for "Schneider" make VCB complete all as specified and directed.

Supply only 2 CO relay 5 Amps, 110V AC as per sample for "Schneider" make VCB complete all as specified and directed.

Supply only Trip coil 110V DC (without bracket) as per sample for "Schneider" and "Areva" make VCB complete all as specified and directed.

Supply only Close coil 110V DC (without bracket) as per sample for "Schneider" and "areva" make VCB complete all as specified and directed.

Supply only Indicating lamp 110V DC as per sample for "Schneider" and "Areva" make VCB complete all as specified and directed.

Supply only Spring Charging motor, as per sample for "Schneider" make VCB complete all as specified and directed.

Supply only Power pack, as per sample for "Areva" make VCB complete all as specified and directed.

Supply only Space heater , as per sample for "Areva" make VCB complete all as specified and directed.

Taking down burnt out transformer of capacity 75 to 250 KVA from pole structure by disconnecting all cable connection and carrying to work shop for repair and following jobs 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 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 load complete. Note:- i) Winding of HT/LT coils shall be measured and paid separately. ii) 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.

Supply only Auxiliary contractor 230V AC, as per sample for "Areva" make VCB complete all as specified and directed.

Supply only Drive beam bar 230V AC, as per sample for "Areva" make VCB complete all as specified and directed.

Supply only PT 11KV/110, as per sample for "Areva" make VCB complete all as specified and directed.

Supply only Indicating lamp, as per sample for "SIEMENS" and "Andrew Yule" make VCB complete all as specified and directed.

Supply only Motor 230 V AC, as per sample for "SIEMENS" and "Andrew Yule" make VCB complete all as specified and directed.

Supply only Master Trip relay, as per sample for "SIEMENS" make VCB, complete all as specified and directed.

Supply only Trip coil 110V DC (without Bracket) ,as per sample for "SIEMENS" and "Andrew Yule" make VCB complete all as specified and directed.

Supply only close coil 110V DC (without Bracket), as per sample for "SIEMENS" and "Andrew Yule" make VCB complete all as specified and directed.

Supply only Aux switch, as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only HT 11 KV grade Bus bar spout, as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only HT 11 KV grade circuit spout, as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only HT 11 KV grade support Insulator, as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only HT 11 KV grade Glass fibre, as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only jaw contract guard as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only cuddle contract, as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only charging Motor, as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only close coil as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only Trip coil as per sample for "Andrew Yule" make VCB complete all as specified and directed.

Supply only HT 11 KV grade ,CT-40-30/5-5 as per sample for "Areva" make VCB complete all as specified and directed.

Supply only HT 11 KV grade ,CT-30-60/5-5 as per sample for "Areva" make VCB complete all as specified and directed.

Supply only HT 11 KV grade , PT 11KV/110V as per sample for "Areva" make VCB complete all as specified and directed.

Supply only HT 11 KV grade, Bus bar spout as per sample for "Areva" make VCB complete all as specified and directed.

Supply only HT 11 KV grade Circuit spout as per sample for "Areva" make VCB complete all as specified and directed.

M/S SARKAR ELECTRIC

M/S SARDAR MAL NAHATA

SHRI D P AGARWAL

M/S BIJAY KUMAR SHIVA