81013 REPAIR/ MAINTENANCE AND REPALCEMENT OF GANG OPERATED SWITCHES, VCBs, TRANSFORMER, HT PANELS, RMUs AND OTHER CONNECTED ITEMS UNDER AGE E/M-I AT GE MINNIEBAY, PORT BLAIR

Amount

Excavating in trenches n. exc. 1.5m wide and n. exc. 1.5m in depth for foundation etc. or for shafts, wells, cesspits, manholes, pier holes etc. n. exc. 10sq.m. on plan and n. exc. 1.5m in depth and getting out in soft/ loose soil complete all as specified and as as directed by engineer in charge.

Excavating in trenches n. exc. 1.5m wide exceeding 1.5m depth and n. exc. 3m in depth for foundation etc. or for shafts, wells, cesspits, manholes, pier holes etc. n. exc. 10sq.m. on plan and exc. 1.5m in depth and getting out in soft/ loose soil complete all as specified and as as directed by engineer in charge.

Returning, filling in including spreading, levelling , watering and well ramming in layers not exc 25cm in any type of soil complete all as specified and as as directed by engineer in charge.

Removing excavated materials to a distance not exc. 50m and depositing where directed at a level n.exc 1.50m above the starting point complete all as specified and as as directed by engineer in charge.

M&L for carrying out servicing of HT 11 KV four pole structure of 11 metre height Steel/ RCC poles including replacement of all perished ACSR conductor (Beaver) of Horizontal bus bar and down conductors for 4 Nos. GOD system on structure, jumpering and binding with aluminium conductor to the post insulators/ pin insulators and providing PVC sleeves to the down conductor with colour code R, Y & B including replacing of all rusted nuts & bolts with new GI nuts & bolts and applying petrolium jelly complete all as specified and as as directed by engineer in charge.

All as per item No.5 herein before but for two pole structure complete all as specified and as as directed by engineer in charge.

S&F Pin type, composite silicon rubber polymeric type insulator 150mm height, 150mm dia for 11000 volts grade, 5 kN with ECR glass rod, forged steel top and bottom, silicon rubber housing and weather sheds, including one galvanized mild steel spindle, galvanized iron washer, spring and one galvanized iron nut all as specified and as directed including taking down existing unserviceable insulator complete all as specified and as as directed by engineer in charge.

M&L for 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 synthetic enamel paint complete including dismantling existing rusted/ unserviceable cross arms complete all as specified and as as directed by engineer in charge.

S&F disc insulator, composite silicon rubber polymeric type 290mm height, 100mm dia for 11000 volts grade, 45 kN with ECR glass rod, forged steel tongue and cleaves, silicon rubber housing and weather sheds all as specified and as directed including taking down existing unserviceable disc type insulator complete all as specified and as as directed by engineer in charge.

Taking down HT 11 KV grade triple pole gang operated Air break switch from 4 pole/ 2 pole structure and S&F new gang operated Air break switch (GOD) HT 11 KV of 400 Amps rating, out door type suitable for vertical mounting, fixed type complete with 2 Nos. silicon rubber polymeric insulator per phase all as specified and as directed.

Taking down HT 11 KV drop out fuses from 4 pole/ 2 pole structure and S&F New single phase drop out fuse 12 KV, 400 Amps rating with 02 Nos silicon rubber polymeric insulator complete all as specified and directed.

M&L for Lightning arresters expulsion/silicon type as per requirement suitable for 11000 volts complete with all fittings, transmission class, discharge capacity 65 kilo amp including taking down damaged / un serviceable Lightning arresters, expulsion type complete with all fittings complete all as specified and as as directed by engineer in charge.

Supply and erect steel tubular swaged poles Type 410 SP-55 11 meter long complete with cast iron base plate, finial taper plug, bolts, nuts & screws all as specified and directed. Note: Earth work and PCC work in foundation/pole coping will be measured and paid separately under relevant items.

M&L for plain cement concrete 1:4:8 type D2 (using 40mm graded stone aggregate) as in foundations, filling and mass concrete for pole walls underneath poles structures, feeder pillar boxes etc. complete all as specified and as as directed by engineer in charge.

M&L for plain cement concrete 1:3:6 Type C2 (using 40mm graded stone aggregate) underneath stay assembly complete all as specified and as as directed by engineer in charge.

M&L for plain cement concrete 1:2:4 Type B1 (using 20mm graded stone aggregate) as in coping for pole complete all as specified and as as directed by engineer in charge.

M&L for Earthing complete with galvanized steel earth plate electrode 60cm x 60cm x 6mm thick, buried directly in ground (earth pit not less than 2.25m deep below ground level with top edge of earth plate not less than 1.5m below normal ground level, earth plate surrounded from all sides by 15cm thick and packed layer of charcoal dust and common salt filing in alternate layers and electrode) connected to galvanized earth strip of 32X6mm size by means of bolts, nuts, check nuts and washers of galvanized iron or steel and connected from earth plate electrode to main switch board/ earthing test point including and protected by 40mm dia medium grade GI pipe and provision of 20mm dia GI pipe medium grade for watering arrangement with PCC 1:3:6 type C1 chamber, MS funnel, wire gauge, 50mm thick precast RCC cover in Type B1, including necessary excavation in any type of soil, returning, filling in, removal of surplus soil to a distance n.exc 50m, charcoal and salt complete all as shown in electrical plate No. 3 of Schedule Part-I 2009 and connected to earthing test point all as specified or indicated and testing on completion complete all as specified and as as directed by engineer in charge.

Note:-(i) cost of GI earth strip and GI protection pipe upto 7.5 mtr length shall be deemed to be included in the quoted rate. (ii) The unit rate shall also includes for wire mesh, funnel, excavation, returning and refilling, PCC chamber pit, RCC cover.

S&F Earth continuity conductor or main earthing lead of GI earth strip of size 32x6mm fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required, fixed with necessary clamps and nuts, bolts etc. including taking out unserviceable strip all as directed.

M&L for isolating, cutting, removing the existing damaged end termination and S&F outdoor end termination, coldshrinkable type suitable for HT UG cable, XLPE insulated of size 3 core x 120sq.mm, 11KV [earthed] grade including preparation complete all as specified and as as directed by engineer in charge.

All as per item No. 19 here-in-before but for HT UG cable of size 3 core x 95 sq.mm, 11KV[earthed] grade complete all as specified and as as directed by engineer in charge.

M&L for isolating, cutting, removing the existing damaged end termination and S&F indoor end termination, cold shrinkable type suitable for HT UG cable, XLPE insulated of size 3 core x120 sq.mm, 11KV[earthed] grade including preparation complete all as specified and as as directed by engineer in charge.

All as per item No. 21 here-in-before but for HT UG cable of size 3 core x 95 sq.mm, 11KV[earthed] grade complete all as specified and as as directed by engineer in charge.

M&L for isolating, cutting, removing the existing damaged end termination and S&F straight through joint, cold shrinkable type suitable for HT UG cable, XLPE insulated of size 3 core x 95sq.mm, 11KV[earthed] grade including preparation complete all as specified and as as directed by engineer in charge.

All as per item No. 23 here-in-before but for HT UG cable of size 3 core x 120 to 185 sq.mm, 11KV[earthed grade complete all as specified and as as directed by engineer in charge.

Taking down of unserviciable old HT Cable of any size and any type complete all as specified and directed .

Supply, lay, testing of HT UG 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 95sq.mm including laying in trenches complete all as specified and as as directed by engineer in charge. Note: (i) Necessary test results like continuity test, megger tests, shall be submitted to Engineer-in-Charge before the cable is laid. (ii) Excavation earth work will be measured and paid separately.

Supply, lay, testing of HT UG 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 120sq.mm including laying in trenches complete all as specified and as as directed by engineer in charge. Note: (i) Necessary test results like continuity test, megger tests, shall be submitted to Engineer-in-Charge before the cable is laid. (ii) Excavation earth work will be measured and paid separately.

Supply, lay, testing of HT UG 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 185sq.mm including laying in trenches complete all as specified and as as directed by engineer in charge. Note: (i) Necessary test results like continuity test, megger tests, shall be submitted to Engineer-in-Charge before the cable is laid. (ii) Excavation earth work will be measured and paid separately.

M&L for steel tubing GI medium grade of size 80mm dia for cable protection, passing under road/floor or for fixing to poles/walls all as specified and directed.

M&L for steel tubing GI medium grade of size 100mm dia for cable protection, passing under road/floor or for fixing to poles/walls all as specified and directed.

Supply and fix in repairs silver painted danger notice plate of 1.6mm thick mild steel sheet, vitreous enameled white, with letters, figures and conventional skull and bones in signal red colour and fixed with silver painted MS clamps, bolts and nuts of approved size, for HT 25x20cm size complete all as specified and as as directed by engineer in charge.

Opening the shutters of VCB 11 KV 630 Amps of any make and model, removing the Breaker from the existing position after disconnecting all the connections from the system, servicing, overhauling of the same, checking of the same for proper operation, spring charge, ensuring control cables are fastened tightly to the terminals, checking any abnormality with PC, VCB, cleaning the surface of the insulators, fasten the bolts, checking and correcting interrupting units, mechanism, linkages etc, fasten the hardware of control wiring, check that the split pins, circlips, dowel pins etc. have not come out and are intact, lubricate the mechanism of moving parts by Castrol all purpose grease or equivalent, check that the contact erosion is within limit including opening of the shutters properly, replacing of the trip catch, roller, holding catch, stopper, close push button, closing cum reassembling, reconnecting of the breaker for smooth functioning all as directed.

Opening the shutters of VCB 11 KV 400Amps of any make and model, removing the Breaker from the existing position after disconnecting all the connections from the system, servicing, overhauling of the same, checking of the same for proper operation, spring charge, ensuring control cables are fastened tightly to the terminals, checking any abnormality with PC, VCB, cleaning the surface of the insulators, fasten the bolts, checking and correcting interrupting units, mechanism, linkages etc, fasten the hardware of control wiring, check that the split pins, circlips, dowel pins etc. have not come out and are intact, lubricate the mechanism of moving parts by Castrol all purpose grease or equivalent, check that the contact erosion is within limit including opening of the shutters properly, replacing of the trip catch, roller, holding catch, stopper, close push button, closing cum reassembling, reconnecting of the breaker for smooth functioning all as directed.

Decarbonizing/ cleaning complete HT 11KV, 3 phase independent bus bar, bus bar chamber of HT panel, electrification connection complete, HT VCB switch gear arrangement incoming and outgoing installed in sub-stations after removing the complete bus bar spout, circuit spout from the bus bar chamber, cleaning with CTC and ensure proper decarbonizing, re-fixing the same after applying Bectrol (Red) solution to the spout, checking all the connections, tightening the nuts, bolts, thimbles for incoming and outgoing system complete all as specified and directed.

Taking out old unserviceable closing coil assembly and S&F closing coil assembly 110V DC suitable for VCBs of make Alsthom / Andrew Yule complete all as specified & directed by Engineer-in-charge.

Taking out unserviceable tripping coil assembly, S&F tripping coil 110V DC suitable for VCBs of make Alsthom / Andrew Yule complete all as specified and as as directed by engineer in charge.

M&L for servicing of Ring main unit HT 630 Amps, 11KV, 50 Hz by removing both the sources of supply power cable carefully, checking its cable ends; removing the body cover of RMU; checking of its drive mechanism, refixing its body covers, refixing the RMU with both ends of cables; necessary testing and charging the RMU all as specified and directed.

Taking down the damaged drop out fuse unit from the overhead structure, supply and fix new aerial fuses suitable for 11KV, with rupturing/ holding capacity 20 Amps complete all specified and directed by Engineer-in-charge.

Taking down the damaged drop out fuse unit from the overhead structure, supply and fix new aerial fuses suitable for 11KV, with rupturing/ holding capacity 40 Amps complete all specified and directed by Engineer-in-charge.

Supply and lay graded stone aggregate of 40 mm size, spread and levelled around 4 pole/ 2 pole structure/ transformer yard all as specified and as directed.

M&L for preparation of painting for steel surfaces of 4 pole structure including brackets, clamps, channels and cross arms by cleaning of oils, lubricants, grease etc. complete above PCC coping and applying two coats of aluminium paint on surfaces 1m above PCC coping, applying two coats of synthetic enamel paint in zebra pattern with black & red colour combination up to 1m height above PCC coping; complete including applying two coats of white wash on exposed concrete surfaces of coping to poles duly preparing the surfaces complete including cleaning/clearing of all tree branches & vegitation 05 meters around the structure all as specified and as directed by Engineer in charge.

All as per item No. 41 herein before but for two pole structure complete all as specified and as directed by Engineer in charge.

M&L for preparation of old decorated surfaces of walls of transformer plinth/4 pole or 2pole structure yard by scraping and wire brushing and applying one coat of cement based paint complete all as specified and as directed by Engineer in charge.

M&L for cable route indicator made of cast iron disc 200mm dia,12mm thick with inscription casting as HT cable fixed to MS angle of size 40x40x6mm, 600mm long with bolts & nuts, duly grouted in PCC 1: 3: 6, type C2 complete including necessary excavation and earth work including taking up existing unserviceable indicators complete all as specified and as directed by Engineer in charge.

Supply and fix Vacuum Interrupter Suitable for 630 A Vaccum cicuit Breaker frequency 50 Hz of Make Andrew Yule complete all as specified & directed by Engr - in - Charge

Supply and fix Vacuum Interrupter Suitable for 630 A Vaccum cicuit Breaker frequency 50 Hz of Make Alstom complete all as specified & directed by Engr - in - Charge

Cutting bushes, levelling the area around E/M installation such as sub stations, 4/2 pole structure etc. including surface excavation not exceeding 30 cm deep and averaging 15 cm deep and getting out roots, jungles etc. throw away not less than 50 mtr from the site and making good all as specified and as directed

S&F in repairs Digital Ammeter 0 - 50 Amps CT Ratio : 50/25/5A of size 13.5cm x 13.5cm complete all as specified and directed by Engineer-in-charge.

M&L for online centrifuging (filtration/ dehydration) of transformer oil including checking di-electric strength of oil before and after filtration for transformers located in Minniebay area with suitable machine having filtration, heating and pumping facility to improve the dielectric strength/ insulation value of oil complete all as specified and directed. Notes :- (i) Di-electric strength of oil after filtration/ dehydration shall not be less than 60 KV/min. (ii) The contactor shall take shut down orders in writing from Engineer-in-charge before commencement of the work. (iii) The contractor shall ensure no wastage of transformer oil. (iv) The di-electric strength of oil shall be tested before & after filtration and test results shall be submitted to Engineer-in-Charge.

Supply and filling new transformer oil for topping up the transformers duly filtered with filtration plant having dielectric strength not less than 60 KV complete all as specified and as directed. Note :- (a) The transformer oil shall be type EHV confirming to IS - 335/1983. (b) Mineral oil grade shall be used. (c) The IR value of transformer oil shall not be less than 60KV/min. (d) The unit rate shall be deemed to include the cost of filtration to achieve desired di-electric strength.

Supply and fill silica gel in breathers of transformers complete all as specified and directed. [Note: The silica gel shall be brought in air tight container]

M&L for spray painting with Synthetic enamel paint of approved quality & colour to indoor/outdoor type, step up/step down transformer of 100 KVA to 400 KVA capacity, installed at different location of Minniebay Area after thoroughly scraping the existing corroded paint/rust, filling of cavities complete including writing the details such as SM/MES No. all as specified and as directed.

M&L for spray painting with Synthetic enamel paint of approved quality & colour to indoor/outdoor type, step up/step down transformer of 500 KVA to 750 KVA capacity, installed at different location of Minniebay Area after thoroughly scraping the existing corroded paint/rust, filling of cavities complete including writing the details such as SM/MES No. all as specified and as directed.

S&F in repair silica gel breather assembly transparent type with first fill of silica gel suitable for 100 KVA transformers complete including connecting with proper rubberized gasket complete all as specified and directed.

S&F in repair silica gel breather assembly transparent type with first fill of silica gel suitable for 160 to 315 KVA transformers complete including connecting with proper rubberized gasket complete all as specified and directed.

S&F in repair silica gel breather assembly transparent type with first fill of silica gel suitable for 400 to 500 KVA transformers complete including connecting with proper rubberized gasket complete all as specified and directed.

S&F in repair silica gel breather assembly transparent type with first fill of silica gel suitable for 630 to 750 KVA transformers complete including connecting with proper rubberized gasket complete all as specified and directed.

Supply and replace unserviceable HV side gun metal/ brass threaded studs of rating 11 KV, 250 Amps of suitable size and length including metal rings, bolts, washers, rubber rings, etc, complete all as specified and directed suitable for indoor/outdoor type, step up/step down transformers of any make/model.

Supply and replace unserviceable LV side gun metal/brass threaded studs of rating 1.1 KV, 250 Amps of suitable size and length including metal rings, bolts, washers, rubber rings, etc, complete all as specified and directed suitable for indoor/outdoor type, step up/step down transformers of any make/model.

Supply and replace unserviceable LV side gun metal/brass threaded studs of rating 1.1 KV, 400 Amps of suitable size and length including metal rings, bolts, washers, rubber rings, etc., complete all as specified and directed suitable for indoor/outdoor type, step up/step down transformers of any make/model.

Supply and replace unserviceable LV side gun metal/brass threaded studs of rating 1.1 KV, 630 Amps of suitable size and length including metal rings, bolts, washers, rubber rings, etc., complete all as specified and directed suitable for indoor/outdoor type, step up/step down transformers of any make/model.

Supply and replacement of aluminum cable lugs/thimbles of size 300 Sqmm complete all as specified and directed by Engineer-in-charge.

Supply and replacement of aluminum cable lugs/thimbles of size 185 Sqmm complete all as specified and directed by Engineer-in-charge.

Supply and replacement of aluminum cable lugs/thimbles of size 120 Sqmm complete all as specified and directed by Engineer-in-charge.

Supply and replacement of aluminum cable lugs/thimbles of size 95 Sqmm complete all as specified and directed by Engineer-in-charge.

M&L for rewinding and re-insulation of LV/ HV coils of any size and type of transformer including cleaning the burnt out insulating material, brazing and rewinding with appropriate turns and size of super enameled copper winding strip including filling insulating paper etc, complete all as specified and as directed. Notes: (i) The unit rate quoted shall be inclusive of varnish sleeving of insulating material, taking down the clamps, upper channels and core & HT links and re-clamping, positioning with separators, brazing etc complete. (ii) Weight of copper coil only shall be considered for payment.

M&L for disconnecting the existing HT/ LT electrical connections of defective transformer terminals and shifting the transformer of capacity 100KVA to 750 KVA from existing position to workshop for repairs and reinstalling the same after repairs in position including necessary testing after reinstalling the transformer complete all as specified and as directed. Notes :- (i) Repair/ replacement of transformer parts shall be measured and paid separately under respective items of BoQ. (ii) The unit rate quoted shall be deemed to include for the cost of shifting of transformer to workshop and back to position.

Disconnecting and removing existing U/S HT Cable both ends and finding the fault location with help of fault locating machine 11KV system including fixing suitable size HT cable joint rectifing the fault complete all as directed (i) Excavation earth work, Cable joint will be measured and paid separately.

Taking down old and rusted HT / LT Steel Tubular pole complete all as specified and directed by engineer in charge.

M&L for dismantling old PT from bus bar of 11KV, 3 ph, 630 A Vacuum circuit breaker and supply and fixing PT 11KV/110V Make - Instran or equivalent suitable for 630 Amps 11KV VCB of Make :- Kirloskar/ Schneider/ CG Model - M 500 including connections of control supply etc and testing the VCB as directed by Engineer-in-charge.

Material and labour for dismantling unserviceable / defective insulators from HT VCBs (Make - Andrew Yule/ Alstom/ Kirloskar/ Schneider) and supply and fixing new insulators as per manufacturer size by disconnecting 11 KV supply from bus bar and VCB panel controls, removing the defective insulators and replacing in VCB bus bus chambers, supports and breaker in/out connections, checking the operation functional of breaker and its accessories including connections of control circuit and testing the VCB 11KV/630 Amps capacity of Make - Andrew Yule / Alstom/ Kirloskar/ Schneider all as directed by Engineer- in-Charge

S&F in repairs for Space Heaters 70W coil element canopy type AC 230V input suitable for HT 11KV VCB panel of any make and capacity, fixed inside the VCB with suitable size of clamps, bolts, nuts including necessary wiring cable connections complete all as specified and as as directed by engineer in charge.

Calibration of earth fault relay (Electro Mechanical), setting the relays for the fault levels as directed by Engineer-in-Charge and testing the operation of Vacuum circuit breaker after installation of relays by simulating different types of faults all as directed by Engineer-in-charge. Note: (a)Work should be carried out by competent service engineer of Alstom / Areva /Kirloskar/CG or Equivalent. (b)The Calibration / Testing & commissioning of items shall be done by certified agency and the cost for the same deemed to be included in the quoted rate.

Calibration of Over Current relay (Electro Mechanical), setting the relays for the fault levels as directed by Engineer-in-Charge and testing the operation of Vacuum circuit breaker after installation of relays by simulating different types of faults all as directed by Engineer-in-charge. Note: (a)Work should be carried out by competent service engineer of Alstom / Areva /Kirloskar/CG or Equivalent. (b)The Calibration / Testing & commissioning of items shall be done by certified agency and the cost for the same deemed to be included in the quoted rate.

Material and labour for dismantling old relays of any type (electromagnetic / PLC / Microprocessor based) for O/C and Earth fault and supply and fixing of microprocessor based relay for O/C and E/F suitable for existing CTs, 11 KV system for feeder / transformer protection with self powered backup system and memory for accesing fault history of the feeder minimum upto 10 events complete all as specified and as directed by Engineer in Charge. Note: (a)Work should be carried out by competent service engineer of Alstom / Areva /Kirloskar/CG or Equivalent. (b)The Calibration / Testing & commissioning of items shall be done by certified agency and the cost for the same deemed to be included in the quoted rate.

Material and labour for dismantling old CT from VCB Panel Board of 11KV, 630 A Cap and supply and fixing 11KV,CT ratio 80-60/5-5A,Burden 15VA , class 1 Make - Instran or equivalent suitable for 630 Amps 11KV Kirloskar/ Areva Andrew Yule/ Alstom/ Schneider Make VCBs including connections of control supply for metering and protecting and testing the VCB all as directed by Engineer-in-charge.

S & F in repair / replacement of LED Indication lamps for VCBs status (on/off/trip/trip ckt healthy etc) complete all as specified and as directed by Engineer-in-Charge.

Supply and fixing HT tape roll 35mm width Appx 5 mtr length complete all as specified and as directed by Engineer-in-Charge.

Supply & laying in repair / replacement of synthetic rubber insulated mats 2.5 mm thick for voltages upto 11 KV for electrical purpose as per IS 15652-2006, suitable for electrical shock safety of sizes 2m x 1m complete all as specified and directed by Engineer in Charge.

S & F in repair / replacement of bakelite shrouds suitable for 11 KV HT VCB Breaker to safeguard the personnel should not be exposed to any live parts complete all as specified and as directed by Engineer-in-Charge

M&L for river sand filling in trenches spreading and levelling in layers n exc 25 cm thick and well ramming including watering as required Complete all as Specified and as directed by Engineer-in-charge.

Supply & Laying reinforced precast concrete cable cover, class HV, type 2 with flat, size 450mm x 180mm x 40mm complete all as specified and as directed by Engineer in Charge.

Sree Tirumala Enterprises

SKV Engineering

PTech Engineers

N Rathinam

Ashini Sikder

CHANDER SEKER ENTERPRISE

Gulmarg Electrical Service