REPAIR/MAINT AND SERVICING OF TRANSFORMER VCB, HT SWITCH GEARS, PROTECTION SYSTEM AND CONNECTED ALLIED WORKS AT KANCHRAPARA, LOS DUMDUM, JAFFERPORE AND BARASAT AREA UNDER GE AF BARRACKPORE

Amount

Disconnecting HV/LV Connections of Transformer, including disconnecting of earthing lead, unscrewing nuts, bolts and washers, testing their un-serviceability (Open and Closed circuit test) with the help of composite unit of Transformer 100 to 350 KVA 6600/433, and isolation transformer of any capacity complete all as specified and as directed.

Opening Top Lid Cover of Transformer 100 to 350 KVA 6600/433 indoor/outdoor, disconnecting all Internal Connections of HT/LT Side for Periodical Maintenance such as Cleaning of Core and Winding by means of Washing by Hosing Down with Clean Dry Oil to removed Dust/Sludge on Core and Coil, Cleaning of Oil Tank to removed Sludge deposited, Replacement of Rusted Gasket Set, Burnt Spindle, Broken/ Unserviceable HV/LV Ceramic Bushing, Broken Arc Horn, Surge Arrestor, Replacement of Silica Gel, etc. complete all as specified and as directed.

Taking down carefully defective transformer of 100 to 350 KVA 6600/433 indoor/outdoor and from foundation base including draining out old transformer oil complete carefully and keeping the same in a cleaned container in safe custody for re use after repair works of transformer and transportation from site to contractors workshop and back to site after repair, connecting HT as well as LT side to existing system, testing and commisioning all as directed by Engineer-in-charge. NOTE : Transformer Oil to be re-used should be dehydrated/ filtered under respective items.

M&L for open the top cover of transformer of capacity 100 KVA to 315 KVA, after disconnecting HT/LT connection, drain out of transformer oil and preserve it in container, replacement of all gasket for prevention of leaking, replacement of broken HT/LT bushes complete as per existing size all as directed, refixing all connection and testing on load.

NOTE : FOR ITEM No. 01 TO 04 (a) Cost of Transformer Oil for Cleaning by Hosing down shall deem to be included in the unit quoted rate. (b) Gasket set, LT/HT side ceramic bushing, spindle for HT/LT side and horn surge arrester etc. for replacement shall be measured and paid under relevant item.

Repairing of Indoor type,air cooled,3 phase,6.6/0.433 KV,50 Hz,315 KVA,copper wound,Resin cast,Dry type distribution transformer having taps on primary winding for volatge variation of +5 % to - 5 % in steps of 2.5 % with off load link changer detailed as below:- 1) Testing and Dismantling of caore coil Assembly. 2) Supply of New Copper wound Resin Cast HV & LV coil of one phase. 3) Supply of necessary new spacers for damaged phase. 4) Reassembly & Testing of core coil assembly. 5) Heating & dehydration of complete 3 phase core coil assembly. 6) Inter connection of Internal assembly. 7) Testing 8) The copper winding will be installed as per existing sample. Note:- (a) Taking out carefully defective Dry type transformer capacity 315 KVA of Sr No VE/086/2122 and of make of VOLTAMP TRANSFORMERS LIMITED VADODARA (INDIA) from Compact Sub Stn installed at ATC and transportation from site to civil workshop and back to site after repair,connecting HT as well as LT side to existing system is deemed included in the quoted rate.LOCATION-ATC (b) The Engr-In-Charge will visit the civil workshop before repairing and opening the dry type transformer.And Engr-In- Charge has power to change the civil workshop if found any discrepancies related to quality of repairing the dry type transformer. (c ) The materials for new resin cast HV & LT coil of one phase to be checked and varified by the Engr-In- Charge. ( d) The repairing of the dry type transformer to be done with full satisfaction of Engr-In-Charge. (e) Copper wire required for both HT & LT side is deemed to be included in the quoted rate.

M & L for repair to the existing housing ( Made of MS sheet) for 315 KVA dry type compact sub stn with providing necessary new insulating materials/PVC channel (As per existing) and to be confirmed for proper closing to the the doors at both sides without any gap complete all as directed. (Location: ATC)

M&L for rewinding of LT copper strip coil for off sizes transformer after removing unserviceable Insulating Materials, Re-insulation and Re-winding as per existing Size of Core of Transformer including Heating, Varnishing, etc., complete all as specified and as directed.

M&L for rewinding of HT wire coil for off sizes transformer using Proper Size new Copper Wire and HV Insulating Materials suitable for Working Voltage 11 KV complete all as specified and as directed by Engineer-in-Charge.

Supply & Fix Ceramic Bushing and Gasket on HT Side of Transformer 100KVA to 350KVA 6600/433 or 11000/433 complete all as specified and as directed.

Supply & Fix Ceramic Bushing and Gasket on LT Side of Transformer 100 KVA to 350KVA 6600/433 or 11000/433 complete all as specified and as directed.

Supply and fix Breather Assembly filled with Silica Gel 500 gm as Approved complete all as specified and as directed.

Supply & Fix Brass Spindle for Terminal on HT Side Threaded complete with Nut, Washers, etc. of dia as ordered, as Approved and suitable and suitable for Transformer 100 to 350 KVA 11000/6600/433, complete all as specified and as directed.

Supply & Fix Brass Spindle for Terminal on LT Side Threaded complete with Nut, Washers, etc. of dia as ordered, as Approved and suitable and suitable for Transformer 100 KVA to 350KVA 11000/6600/433, complete all as specified and as directed.

S&F Gasket (Cock Sheet) 6 mm thick with Conical Rubber Bush Complete as approved and suitable for Transformer 100KVA to 350 KVA 6600/433 Volt including Taking down/ out unserviceable Gasket, complete all as specified and as directed.

M&L for applying one coat of synthetic enamel paint by spray painting including preparation of body of transformer of capacity 100KVA & 350 KVA 11000/6600/433, complete all as specified and as directed.

S&F in repair for 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 as 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 sqmm to 95 sqmm complete all as specified and as directed.

Supply and topping up of new transformer oil for topping up all as directed.

M&L for dehydrartion of transformer oil complete all as required and as directed.

M&L in repair of HT 11 KV outdoor gang operated air-break switch suitable for horizontal or vertical mounting with drop out fuse having 12 insulators of rating upto 200 Amps including changng of unserviceable parts complete all as specified and as directed.

S&F in repair Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo Amp 11000 Volt complete all as specified and as directed.

M&L for Servicing / Greasing of HT Switch air break ( GOD) 11 KV TP with replacement of Corroded nut Bolts, ACSR Jumpers, making alignment of operating Mechanism for Proper ON / OFF operation of GOD and male contact including greasing complete all as specified and as directed.

M&L for preparation of HT Steel Tubular Two pole structure including cross arms, MS channels, clamps after scrapping thoroughly the existing rust / dirt / dust and corroded paint from the old steel surfaces and applying two coats aluminum paint over a coat of red oxide primer, complete all as specified and as directed.

M&L for preparation of HT Steel Tubular Four pole structure including cross arms, MS channels, clamps after scrapping thoroughly the existing rust / dirt / dust and corroded paint from the old steel surfaces and applying two coats aluminum paint over a coat of red oxide primer, complete all as specified and directed.

M&L for preparation of HT PCC electric pole (6 pole structure) of any size / pattern, old PCC surfaces, and applying a coat of weather proof acrylic synthetic paint, 100% acrylic, including painting cross arms with two coatsof aluminum paint over a coat of red oxide Primer, complete all as specified and as directed.

S&F in repair Cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling 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 as directed.

M&L for ACSR conductor, proper jointing with suitable clamps and termination with the help of suitable lugs in GODs,Drop Out units, insulators and cable end terminations etc of weasel with permissible sag as per IS rules etc all as specified and as directed.

S&F in repair Disc type insulator, porcelain, vitreous 145mm high and 255 mm dia ball and socket type, white, brown or green single disc assembly for tension with tension clamps for couductor, working pressure 11000 Volt, complete all as specified and as directed.

M&L in repair Pin type, porcelain, vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut150mm height, 150mm dia for 11000 volts grade, complete all as specified and as directed.

M&L for 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 aluminium conductor cable of size 95 sqmm, complete all as specified and as directed.

Excavation in trenches in soft/loose soil not exceeding 1.5 m wide and not exceeding 1.5 m in depth, n.exc 10 sqm on plan and getting out complete all as specified and as directed .

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

Removing excavated soil to a distance n.exc 50m and depositing where directed at a level not exc 1.5 m above the starting point complete all as specified and as directed.

Taking out defective HT UG cable alongwith PCC cover from trenches complete all as directed.

Supply, filling in trenches, spreading, leveling sand cushioning 8 cm below cable and 15 cm above the cable punned down to 18 cm for under ground cable complete all as specified and as directed. (NOTE : For the purpose of Payment, Punned thickness of Sand Cushioning only shall be measured and paid for).

Supplying and laying un-reinforced precast concrete cable cover, class HV, type I, flat, as per IS - 5820 of size 300mm x 180mm x 40mm, laid perpendicular to the length of UG cable in trenches complete all as specified and directed .

Re-laying of un-reinforced precast concrete cable cover, class HV, type I, flat, as per IS - 5820 of size 300mm x 180mm x 40mm, laid perpendicular to the length of UG cable in trenches complete all as specified and directed .

Supply, laying & testing and connecting cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty)with stranded aluminium conductor, 11000 volts grade, of size 3 core 95 sq mm, ( earth grade) ISI marked with valid CML no, complete all as specified and directed.

M&L for Re-Laying/Fixing or Passing through Pipe, XLPE insulated, Armoured, Electric Power UG Cable (Heavy Duty) with Aluminium Conductor, 11000 Volt Grade, Nominal Cross-Sectional area 95 sqmm 3 core, complete all as specified and as directed. (Location : Near Petrol Pump and F-7 Hanger).

M & L for finding out faulty HT UG cable already laid from MRS Palta gate to CPWD sub stn. Note :-(a) HT cable fault detector machine to be arranged/brought by the contractor at his own cost. (b) Straight through joint to be measured and paid separately. (c) HT cable to be measured and paid separately. (d) Total length of HT cable from MRS to CPWD sub stn is 970 RM (Approx). (e) Necessary earth work to dig out the faulty location to be deemed included in the quoted rate.

M & L for finding out faulty HT UG cable already laid from MRS Palta gate to BT local sub stn. Note :-(a) HT cable fault detector machine to be arranged/brought by the contractor at his own cost. (b) Straight through joint to be measured and paid separately. (c) HT cable to be measured and paid separately. (d) Total length of HT cable from MRS to BT local sub stn is 780 RM (Approx). (e) Necessary earth work to dig out the faulty location to be deemed included in the quoted rate.

Disconnecting and taking out existing HT 6.6 KV to 11 KV VCBs of any make from housing and cleaning, rubbing and overhauling the mechanical parts and Servicing of 6.6 KV to 11 KV in door VCB, checking of quality of vacuum interrupter, insulation resistances, static contact resistance, Testing ( IR value, Ratio test, Polarity test) and connection verification of 6.6 KV to 11 KV Current transformer( Set of three) by PRIMARY INJECTION KIT ,and Testing and calibration of relay( set of two Over current and one earth fault) by SECONDARY INJECTION KIT including all other functional tests of the VCB, C&R panel and CTs, PTs. complete all as specified and directed.

S&F Vacuum Interrupter type VG 2EN with TC suitable for 6.6 KV to 11 KV VCB Panel as per existing, complete all as specified and directed.

S&F Vacuum Interrupter with TC suitable for 6.6 KV to 11 KV VCB Panel as per sample, complete all as spd and directed.

S&F breaker charging motor including Gear assembly 110 volt/ 220 Volt AC suitable for 6.6 KV to 11 KV VCB panel, complete all as specified and directed.

S&F Multifunction meter square type Digital of size 96 Sqmm of capacity 0 to 15 KV PT Ratio 6.6KV/110 Volt for panel omplete all as specified and directed.

Supply, installation, testing and commissioning of Micro processor base relay (02 O/C + 01 EF) for 6.6 KV to 11 KV VCB panel , rating 5 Amps, Auxiliary supply 20-110 Volt DC complete all as specified and directed.

Supply, installation, testing and commissioning of voltage operated auxiliary relay with SR contacts for 6.6 KV to 11 KV VCB panel , coil rating 24V DC with operational time 20-25 ms, complete all as specified and directed.

M & L for Trip and Close switch for 6.6 KV to 11 KV VCB panel 02 Amps/110 volt with locking arrengement, complete all as specified and directed.

S & F 6.6 KV panel indicating lamp fitting LED type suitable for 24 volt/30 volt DC with base, complete all as specified and directed.

S & F 6.6 KV panel indicating lamp fitting LED type suitable for 110 volt/230 volt AC with base, complete all as specified and directed.

S & F limit switch suitable for VCB Panels, complete all as specified and directed.

M & L for replacement of the lever lock ( As per existing) to the incoming VCB at Main Receiving Station Palta Gate of 6 WG, complete all as specified and directed.

Supply, installation and testing the powerpack, input 230V AC, 50 HZ, output 30V DC 20A, suitable for operation and protection of 6.6 KV to 11 KV Panel VCBs at Main receiving station Palta Gate of 6 WG, comptete all as specified and directed.

Note: Schedule of cedit amount of Rs 78557.00 shall be deducted from the total quoted amount of BOQ.

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