REPAIR/MAINT AND SERVICING OF DISTRIBUTION TRANSFORMER, VACCUM CIRCUIT BREAKER, HIGH TENSION SWITCH GEARS, PROTECTION SYSTEM AND CONNECTED ALLIED WORKS AT AF STN BARRACKPORE UNDER AOR 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, refixing all connection and testing on load. complete all as specified and as directed by Engineer-in-Charge.

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 remove the Dust/Sludge on Core and Coil, Cleaning of Oil Tank to remove 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 , refixing all connection and testing on load. 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 QUOTED UNIT 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.

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 by Engineer-in-Charge.

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 6.6 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. (MAKE : MYSORE POTTERIES/BHELL or equivalent make as approved)

Supply & Fix Ceramic Bushing and Gasket on LT Side of Transformer 100 KVA to 350KVA 6600/433 complete all as specified and as directed. (MAKE : MYSORE POTTERIES/BHELL or equivalent make as approved)

Supply and fix Breather Assembly filled with Silica Gel 500 gm of metal body 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 ,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 apply one coat of synthetic enamel paint by spray painting including preparation of body of transformer 100KVA & 350 KVA,6600/433, complete all as specified and as directed.

M&L 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. Make RAYCHEM/DENSION/3M

M&L for 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 95 sqmm. complete all as specified and as directed. Make RAYCHEM/DENSION/3M

M&L of new transformer oil for topping up all as directed.Make:power oil/indian oil/servo

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

M & L for finding out faulty HT UG cable already laid HT Cable within the 2 KM radiuscomplete all as specified and directed.. 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) 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 VCBs of any make from housing and cleaning, rubbing and overhauling the mechanical parts and Servicing of 6.6KV 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 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. Note :Spare parts shall be measured and paid under relevant item.

Supply and Fix Vacuum Interrupter type VG 2EN with TC suitable for 6.6 KV VCB Panel as per existing, complete all as specified and directed.(VCB make-Schneider)

Supply and Fix Vacuum Interrupter with TC suitable for 6.6 KV VCB Panel as per sample, complete all as spd and directed.(VCB Make: Kirloskar)

Supply and Fix breaker charging motor including Gear assembly 110 volt/ 220 Volt AC suitable for 6.6 KV VCB panel complete all as specified and directed.

Supply & Fix Multifunction meter square type Digital of size 96 Sqmm of capacity 0 to 15 KV PT Ratio 6.6KV/110 Volt for panel complete all as spd and directed (Make : Conzerv or equivalent)

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

Supply install ,testing and commissioning of voltage operated auxiliary relay with SR contacts for 6.6 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 VCB panel 02 Amps/110 volt with locking arrengement. Make: switron /Kee or equivalent)

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

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

S & F limit switch suitable for VCB Panels 6.6 KV complete all as specified and directed..

Excavation in trenches not exceeding 1.5 mtr depth width and not exceeding 1.5m depth for laying under ground cable in loose/soft soil complete all as specified and directed. .

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

Removal of surplus soil obtained from excavated material not exceeding 50 mtr and depositing where directed at a level not exceeding 1.5 mtr above the starting point complete all as specified and directed..

M&L in repair for laying of XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts, grade cross sectional area 95 sq. mm 3 Core, complete all as specified and directed. Make : Havells/Gloster

M&L for sand cushioning for protection of PVC cable with screen wash river sand and punning to proper required cover complete all as specified and directed..

Supplying and laying un-reinforced precast concrete cable cover but class HV, Type 1, flat, size 300mmx l80mm x 40mm complete all as specified and directed.

M&L in repair of HT 6.6 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 all as specified and directed. Make : BHEL/JAIPURIA BROTHERSS/PACTIL

S&F in repair Lightning arresters expulsion type complete with all fittings, transmission class, discharge capacity 65 kilo amp 6600 Volt complete all as specified and directed. Make : JAIPURIA BROTHERS/ALSTOM/OBLUM

M&L for Servicing / Greasing of HT Switch air break ( GOD) 6.6 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 complete greasing all as directed by Engr-in-Charge.

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 directed.

S&F in repair Aluminium conductor any size, steel reinforced, complete all as specified and 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 6600 Volt, complete all as specified and 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 6600 volts grade, complete all as specified and directed.

Supply installation, commissioning and testing including providing all necessary electrical connection, 6.6 KV HT feeder pillar box (CPRI Approved), outdoor type ,factory made out of 3 mm thick MS sheet of size 1.0 m x 1.0 m x 0.6 m deep having hinge opening arrangement in front and back side and bottom frame made out of angle iron of size 50x50x6mm thick and 04 nos legs 0.5 meter length with cable entry and exit circular hole with cable gland & gasket at bottom complete including painting to all internal and external exposed steel surfaces with powder coating paint (5 stage process) with duly fixed in ground with necessary PCC foundation (1:2:4) type B1, with danger notice plate of 1.6mm thick mild steel sheet, vitereous enamelled (white), with letters to be written 6600 Volt, figures and conventional skull and bones in signal red colour, fixing lugs, bolts, screws etc complete and comprising of the following accessories including necessary excavation work for taking out cable loop and refilling the trenchesand feeder pillar box made reptile proof including taking down old unserviceable HT FPB all as directed by the Engr-in-Charge :- Location : Storm Sump Pump sub stn. (a) Anodized Aluminium bus bar of capacity 1200 Amp ( Size 100mm x 12 mm) - 03 Nos (b) 6.6 KV HT Base PVC insulator for fixing of busbar (03 x 03 =09 Nos)