REPAIR/ MAINT TO HT CABLES, PLANT, TRANSFORMERS, STABILIZER, ISOLATION TRANSFORMER, AND UPS ETC 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.

Repair / servicing of transformer in situ of any make, any type, capacity 50 to 500 KVA (step up or down) installed at various location in Tech area / Domestic area / Army 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 supply and fixing 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) Replacement of unserviceable bushing and terminals as ordered by the Engineer-in-Charge. e) Filling up the transformer with existing taken out transformer oil ( Dielectric and acidic test report to be submitted to the office before refilling the oil ) and top up the same with new oil as ordered. f) 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. Note:- i) Replacement of unserviceable bushing (HT/LT) and terminals shall be measured and paid separately 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) In case dehydration is necessary, the same shall also be done at site and to be measured separately under appropriate item. v) Dielectric and acidic test shall be measured seperately .

Taking down burnt out transformer of capacity 50 to 160 KVA from pole structure 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 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.

All as per item No 3.00 above but copper winding of capacity of transformer 200 to 250 KVA.

Supply only following items (Provisional) to incorporate against different items of BOQ (Fixing charges are deemed to be included with connected BOQ 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 50 KVA to 200 KVA.

Supply only HT porcelain bush set 11 KV for out door transformer of any size as per site requirement of capacity ranging from 250 KVA to 500 KVA.

LT termination porcelain bush of outdoor / indoor transformer of capacity ranging from 50 KVA to 200 KVA as per site requirement.

LT termination porcelain bush of outdoor / indoor transformer of capacity ranging from 250 KVA to 500 KVA.

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.

HT 11 KV terminals stud with nuts, washers made out of brass of suitable size as per site requirement for transformer ranging form 250 KVA to 500 KVA.

LT terminals stud made out of brass with nut and washer, suitable for transformer of capacity ranging from 50 KVA to 200 KVA.

LT terminals stud made out of brass with nut and washer, suitable for transformer of capacity ranging from 250 KVA to 500 KVA.

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.

Dehydration and filteration of transformer oil from Transformer (s) and Oil Circuit Breaker (s), installed at various Sub Station 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 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

Supply and winding of HV coil (11000 Volts grade) complete wounded with supper enamel insulated / DPC / DCC Copper conductor ISI marked of guage as per existing, suitable for 50 to160 KVA Transformer complete all as specified and directed.

Supply and winding of HV coil (11000 Volts grade) complete wounded with supper enamel insulated / DPC / DCC Copper conductor ISI marked of guage as per existing, suitable for 200 to 250 KVA Transformer complete all as specified and directed.

All as per item No. 13.00 but with super enamel/DPC/DCC all aluminium wire of existing gauge of transformer capacity 100 to 200 KVA.

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 complete all as specified and directed.

De-reeling of unserviceable existing copper winding LT coils, re-insulated the same with DPC insulation and winding the strips and make suitable for fixing in transformer of Capacity 75 to 250 KVA complete all as specified and directed.

All as per item No.16.00 but for aluminium LT coil 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 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.

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.

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. 22.00 above but using copper sulphate in lue of common salt.

Supply and fix 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 all as specified and directed.

Material & Labour for preparation of old rusted Transfermer, 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 as 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 aluminium 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 aluminium conductor cable of size 50 Sq mm to 95 sqmm complete all as specified and directed.

S&F 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 Sq mm to 95 sqmm complete all as specified and directed.

Taking out 100KVA to 150 KVA unserviciable stabilizer from site by dismantling all electrical connection from pannel and re-arrange for bypass connection temporary basis and carry to the contractors workshop and dismantle the outer and inner fittings part by part carefully and repair/ replacement of all under mentioned unserviciable spare parts along with connected accessories including overhauling other parts complete and re-install to its previous place with proper connection by thimbaling all termination end of cable all as specified and directed.

Taking out 30 to 75 KVA unserviciable stabilizer from site by dismantling all electrical connection from pannel and re-arrange for bypass connection temporary basis and carry to the contractors workshop and dismantle the outer and inner fittings part by part carefully and repair/ replacement of all under mentioned unserviciable spare parts along with connected accessories including overhauling other parts complete and re-install to its previous place with proper connection by thimbaling all termination end of cable all as specified and directed.

Taking out 15 to 25 KVA unserviciable stabilizer from site by dismantling all electrical connection from pannel and re-arrange for bypass connection temporary basis and carry to the contractors workshop and dismantle the outer and inner fittings part by part carefully and repair/ replacement of all under mentioned unserviciable spare parts along with connected accessories including overhauling other parts complete and re-install to its previous place with proper connection by thimbaling all termination end of cable all as specified and directed.

Supply only following items (Provisional) to incorporate against stabilizer Note- Fixing charges are deemed to be included with connected BOQ items where the parts are required to replace.

Step down control transformer suitable for 15 to 25 KVA stabilizer.

Step down control transformer suitable for 30 to 75 KVA stabilizer

Step down control transformer suitable for 100 to 150 KVA stabilizer

Control PCB card suitable for 15 to 25 KVA stabilizer

Control PCB card suitable for 30 to 75 KVA stabilizer

Control PCB card suitable for 100 to 150 KVA stabilizer

servo stepper motor suitable for 15 to 25 KVA stabilizer

servo stepper motor suitable for 30 to 150 KVA stabilizer

M&L for Rewiring control cicuit partially with single core copper conductor as per existing size for 15 to 25 KVA stabilizer complete all as specified and directed.

M&L for Rewiring control cicuit partially with single core copper conductor as per existing size for 30 to 75 KVA stabilizer complete all as specified and directed.

M&L for Rewiring control cicuit partially with single core copper conductor as per existing size for 100 to 150 KVA stabilizer complete all as specified and directed.

M&L for Heat varnishing main transformer complete for 15 to 25 KVA stabilizer complete all as specified and directed.

M&L for Heat varnishing main transformer complete for 30 to 75 KVA stabilizer complete all as specified and directed.

M&L for Heat vernishing main transformer complete for 100 to 150 KVA stabilizer complete all as specified and directed.

M&L for preparing surfaces of two pole structure including cross Arms, Channels, clamps etc by scraping old paints and applying two coats of aluminium paint and writing 'HT' and pole No in black paint etc complete all as specified and directed.

M&L for preparing surfaces of four pole structure including cross Arms, Channels, clamps etc by scraping old paints and applying two coats of aluminium paint and writing 'HT' and pole No in black paint etc complete all as specified and directed.

Supply and fix in repiar danger notice plate of 1.6mm mild steel sheet, vitreous enamelled white with letters, figures and conventional skull and bones in signal red colour and fixed with screws, nuts, bolts with adequate size clamps on HT pole of 25x20cm size 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 strip, 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 fabricated 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 resincast moulded bushing fitted on 12 mm glass fibre inside, top plate suitable for 11KV with 3 Nos aluminium bus bar 400 amp current capacity separated with fire retardent sepretor, duly powder coated paint 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 in situ of any make, any type, any capacity upto 10 KVA installed at various location in Tech area complete all as specified and as directed.

Repair / servicing of UPS online in situ of any make, any type, any capacity upto 10 KVA installed at various location in Tech area complete all as specified and as directed.

Cutting of tree branches not exceeding 30 cm girth around overhead electric lines / pole structures etc, removing serviceable materials to MES store and disposing of unserviceable materials to a distance not exceeding 50 metre complete all as specified and directed.

Excavation in trenches/ pits in any type of soil (soft/loose/hard/dense) not exceeding 1.5 m wide and not exceeding 1.5 m deep and getting out complete all as specified and directed.

Returning, filling in, including, spreading, levelling, watering and well ramming in layers not exceeding 25 cm thick complete all as specified and directed.

Removal of surplus excavated soil to a distance not exceeding 50 m and depositing where directed at a level not exceeding 1.5 m above the starting point complete all as specified and directed.

M&L clean and dry sand (unwashed) in trenches around the cable for cushioning complete all as specified & directed. Note :- Sand cushioning 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 Sub class 'B' bricks (old size) laid flat in trenches as cable covers complete all as specified & directed.

Taking out Old un-serviceable UG cable of any Size from site of work all as specified and as directed.

Taking out Old un-serviceable GI Pipe any size from site of work all as specified and as directed.

Supply, laying, testing and commissioning in pipes/ ducts/ poles/ trenches/ under floor/ under road XLPE insulated cable screened, PVC heavy duty with aluminium conductor,11000 Volt grade(earthed) of cross section area 95 Sqmm, 3 core complete all as specified & directed.

Supply and laying 80mm bore GI pipe 'light grade' in trenches, under floors, roads, along poles for protection of cables, including sealing ends complete all as specified and directed. Note:-Clamps to be measured and paid under appropriate item)

M&L for steel tubular swaged pole complete with mild steel base plate 30cm x30cm x6mm thick, finial taper plug, bolts, nuts, screws as per IS-2713 (Part-II) 1980 made out of mild steel tubing complete type 410 SP-55(11.0 m long) including painting with two coats of aluminium paint over one coat of red oxide primer on exposed portion and with two coats of bituminous paint on embedded portion in concrete and marking number on pole, dismantling existing pole and including excavation in soft/loose soil, returning filling and removal of surplus soil to a distance not exceeding 50m, PCC 1:3:6 type C-2 (using 40mm graded stone aggregates) as in foundation of size 600x600x1800mm, Poviding PCC 1:2:4 type B-2(using 20mm graded stone aggregates) as in coping above GL 300mm high and 450mm dia complete all as specified and directed.

M/S. KUMAR CONSTRUCTION CO.

CONSTRUCTION SHELTER

SHRI D P AGARWAL

M/S SARDAR MAL NAHATA

M/S P K AGARWALA