REPAIR AND MAINTENANCE OF STABLIZER, TRANSFORMER WITH CONNECTED SERVICES AT NAGROTA UNDER GE NAGROTA

Amount

M&L for taking down transformers mounted on two/four pole structure or on platform / indoor floor mounted carefully from their position after removing electrical connection, earthing leads etc, for executing necessary comprehensive preventive maintenance as well repairs necessiated, includidng to and fro transporting to MES store yard/contactor wksp, and refixing after execution of maint/repair to their original position or to other location as directed of capacity as under: -

Step down transformer 11 KV/0.433 KV of any make of capacity 63 KVA to 160 KVA.

All as per srl item no 1.01 but capacity exceeding 160 KVA but n.exc 500 KVA

Labour, tools & plants only for opening the top cover of transformer out/in door type, step down 11 KV/0.433 KV of cap 50 KVA to 160 KVA, lifting of core and winding, draining out transformer oil into container and keep a side for treatment and reuse, carry out strip inspection of core and windings for comprehensive routine, preventive maint and any other necessary repairs reqd to be executed. Refitting the core & windings after carry out necessary routine maint/preventive maint or repairs so ordered, making all electrical connections, providing sundry items i.e bolts, nuts & washers, reassembling the transformer complete, including testing and commissioning to the entire satisfaction of the Engineer-in-Charge, complete all as specified and as directed.

All as per srl item No 2 here-in-above but transformer of cap exceeding 160 KVA but not exc 500 KVA. Note for srl item No 2 & 3 above: Preventive maint/repairs so assed shall be measured and paid for separately under the respective item of sch 'A' here-in-after. However the rates quoted under col 5 of sch 'A' are deemed to include for all type of checks to be conducted to asses the repairs and preventive maint, dismentaling, lifting, core with winding, relowering of core with winding refitting of transformer, making electrical connection, commissing and testing complete after repairs.

M&L for dismantling core, taking out damaged coils (HV Coils) from its position for replacement, including supplying and fixing new winded coils with super enamelled copper winding wires of reqd gauge, number of turnings & weight to suit with the existing coils with allied insulation materials, packing with spacers etc, complete all as specified and directed.

M&L for taking out damaged coils (LT Coils) from its position for replacement including supplying and fixing new winded coils with cotton braided copper wire or strip of approprite size (thickness & breath) number of turnings & weight to suit with the existing coils with allied insulation materials, packing with spacers etc, complete all as specified and directed.

Taking out HV procelain bushes from transformers for replacement being damaged, including supply and fixing new HV procelain, viterous white, brown or green of voltage grade 11000 V bushes to suit the size of transformers of different makes transformer of cap 63 KVA upto 500 KVA indoor complete all as specified and directed.

Taking out LV procelain bushes from transformers for replacement being damagd, including supply and fixing new HV procelain, viterous white, brown or green of voltage grade 1100 V bushes to suit the size of transformers of different makes transformer of cap 63 KVA upto 500 KVA indoor/out door complete all as specified and as directed.

Taking out worn out HV metallic alloy(brass/gun metal) bush rods, incl supply and fixing new HV metallic alloy (gun metal/brass)bus rods of suitable length and dia with necessary nuts, washers and bushing packing to prevent oil leaking from the bushes including making necessary connections for transformer of cap 50 KV A to 160 KVA complete all as specified and directed.

All as per srl item No 8 here-in-above but for transformer of cap exceeding 160 KVA but not exc 500 KVA.

Taking out worn out LV metallic alloy (brass/gun metal) bush rods, including supply & fixing new LV metallic alloy (gun metal/brass) bus rods of suitable length and dia with necessary nuts, washers and bushing packing to prevent oil leaking from the bushes including making necessary connections for transformer of cap 50 KVA to 160 KVA complete all as specified and directed.

All as per srl item No 10 here-in-above but for transformer of cap exceeding 150 KVA but not exc 500 KVA

S&F cork sheet 6mm thick gasket packing to transformers top cover of various cap upto 500 KVA outdoor / indoor.

Filteration, dehydration of transformer oil as drain out from transformer vide sch 'A' srl item No 2 & 3 here-in-above to make the oil fit for reuse by improving its di-electric strength not less than 40 KV below 40 KV di-elctric strength oil shall be replaced with new oil (new oil for toping/or for replacement shall be measured and paid separately under appropriate item of sch 'A') here-in-after.

Supply, treating (dehydrating), filling new transformer oil in transformers for topping up levels or for replacement of unfit oil .New oil having dielectric strength not less than 60 KV and shall be confirming to IS 335.

Taking out old breathers from transformer and supplying & fixing new breather duly filled with activated agent i.e silca gel for transformer of cap 63 KVA to 200 KVA

All as per srl item No 15 here-in-above but for transformer of cap exceeding 200 KVA but not exc 500 KVA

Supply, fixing, commissioning & testing of dial type temp gauge 100mm dia dial range 0-100ºC complete with thermostat built in switch complete all as specified and as directed.

M & L for taking out UNSV tap changing gear for replacement, including supply & fixing, making connections, testing & commissioning new tap changing gears in transformers of any description / rating and make complete all as specified and directed.

M & L complete for denting out damaged external cooling tube of transformer & bring them to their original shape, of any type and description against of cap 63 KVA to 500 KVA.

M & L, welding to iron surface sheet steel in cooling tube/ body of transformer of any description to prevent leakages of oil , welding in repairs exceeding 2.5 cm but n.exc 5 cm in length, thickness of metal to be welded n.exc 6mm.

Painting to transformers old painted surface of steel after cleaning, scraping and preparing and filling cavities and providing one coat of synthetic enameled grey paint with spray gun process to transformer of cap 63 to 160 KVA indoor / outdoor type.

All as per srl item No 21 above but for transformer of cap exceeding 160 KVA but not exc 500 KVA.

Cleaning, preparing and painting with one coat of grey samson paint to tubular pole of HT 11 KV complete and aluminium paint to poles, cross arms, MS channels, angle iron, frame work bracing of pole and writing of HT feeder name with black enemelled paint from stencil complete all as directed by Engineer-in-Charge.

Taking down transformer of any size,any capacity and reinstalling after repair of platform (including lifting of transformer from the existing platform and reinstalling of transformer on new platform).

M&L of transformer plateforms of size 2.50 m x 2.50m x 1.20m with following specifications as under a)brick work in sub class B brick old size burnt clay bricks exc 6m mean radius on plan in cement mortar 1:4 complete all as spd and directed b) PCC 1:3:6 as in foundation filling and mass concrete c) Stone boulder filling n.exc 63mm including hand packing and ramming complete d) PCC 1:2 :4 as in flooring / top surface of plate form complete e) Plastering to brick work in CM 1:4 complete f) Angle iron as in post for fencing g) Chain link fencing of any size 4 mm dia GI wire

MS Framed work as in framed structure (around 4 pole/2 pole/ LT pannel/ Transformer) guard bars, framed balusters and similar works complete including PCC work as in foundation complete all as specified.

Expended metal cut to length, bend to required shape weight not less than 4 kg/Sqm and laying with and including annealed MS wire or welded to steel members complete all as specified.

Material and labour for spreading and leveling evenly (any thickness) 20 mm graded stone aggregate complete all as specified and directed.

Material and labour for spreading and leveling evenly (any thickness) 40 mm graded stone aggregate complete all as specified and directed.

Cutting & trimming tree branches along HT/LT over head lines after arranging shut down and by taking all precautions while working on lines, clearing of area, cleaning around sub stations, etc by employing a team of 3 labours for 8 hours per day including all T & P required for the purpose complete all as directed by Engineer-in-Charge.

Earthing complete with galvanised steel earth plate electrode 60×60cm.× 6mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, using galvanised iron strip 25×4mm as earthing lead connected to using galvanised iron strip 25×4mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No. 5 connected to earthing test point all as specified or indicated including testing on completion all as specified and directed by Eng In Charge.

Aluminium strip of size 25 x 4 mm for earth continuity conductor or main earthing lead fixed to wall, burried in ground, fixed along with poles, complete all as specified.

Cable jointing kit for 11 KV (Earthed) grade cable for indoor termination heat 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.

All as per srl item No 33 here in before but for cable of cross sectional area 120 to 185 sqmm indoor type

All as per srl item No 33 here in before but indoor joint for cable of cross sectional area 240 to 300 sqmm

All as per srl item No 33 here-in-before but for out door 50 to 95 sqmm

All as per srl item No 33 here-in-before but for cable of cross sectional area 120 to 185 sqmm outdoor type

All as per srl item No 33 here in before but outdoor joint for cable of cross sectional area 240 to 300 sqmm

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 95 sqmm.

All as per srl item No 39 here in before but for cable of cross sectional area 120 to 185 sqmm indoor type

2.5 mm thick Synthetic insulating mat suitable for 11000 volt grade (ISI Marked) of size (2mx1m) complete all as specified and directed.

Switch air break gang operated (Swing out expulsion ruse insulators), tripple pole mechnical operated from ground level mounted on insulator and steel frame (15 insulators type) out door type suitable for vertical installation single break provided with locking arrangement consisting of MS channel HT post top insulator with drop out fuses operating rod 20mm dia GI medium grade pipe worked from ground levelconfirming of IS 1818 of 1972 and contineous current rating upto 200 amp and volt 11 KV including taking down of existing GOD complete in repairs all as specified.

Switch air break gang operated (Swing out expulsion ruse insulators), tripple pole mechnical operated from ground level mounted on insulator and steel frame (15 insulators type) out door type suitable for vertical installation single break provided with locking arrangement consisting of MS channel HT post top insulator with drop out fuses operating rod 20mm dia GI medium grade pipe worked from ground levelconfirming of IS 1818 of 1972 and contineous current rating upto 400 amp and volt 11 KV including taking down of existing GOD complete in repairs all as specified.

Lightning arrestor non liner resistor type comply with IS 3070 Part I 1985 for alternating current system multple spark gap suitable for voltage grade 11000 volt discharge cap 65 KA complete with all fittings and all as specified.

PCC 1:4:8 type D-2 (using 40mm graded crushed stone aggregates) as in foundation filling and mass concrete in foundation of pole/stays etc complete all as specified

PCC 1:3:6 type C-2 (using 40mm graded crushed stone aggregates) as in foundation filling and mass concrete in foundation of pole/stays etc complete all as specified

PCC 1:2:4 type B-1 (using 20mm graded crushed stone aggregates) as in coping/above ground level around the pole etc complete all as specified.

Supply and fixing steel tubular pole, swaged, complete with cast iron base plate, finial taper plug, bolts, nuts, washer and screws including painting with two coats of aluminium paint over one coat of red oxide primer on all exposed surfaces and tarring with black bituminous paints to portion embedded in PCC including numbering of poles with two coats of synthetic enamel paints,type 410 SP-55 (11.0 metres long) complete, Including disconnecting and taking out old damage PCC pole all as directed .

M & L for Cross arms, bracing, supports, clamps and back plate, fabricated from structural steel section including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as directed including two coats of synthetic enamel paint over a coat of red oxide primer, including dismantling existing cross arms, bracing, supports, clamps and back plate, complete all as directed .

M&L Stay assembly galvanised iron complete with accessories stay rod 18mm dia, 180cm long with two nuts, stay bow 14mm dia and 38cm long with stay plate 300x300x6mm thickmild steel stay thimble and required length including binding to insulator stay bow and stay clamp galvanised iron stary strand wire 7/4mm dia complete all as specified and shown in EP plate No 1 of SSR 2009 .

Excavation in trenches not exceeding 1.5m wide and not exceeding 1.5m in depth and getting out in any type of soil for errection of HT/LT poles laying of HT/LT UG cables and provn of stay assembly complete all as specified.

Excavating in trenches, not exceeding 1.5m wide and exceeding 1.5m but not exceeding 3m in depth for foundation, etc or not exceeding 10 Sqm on plan and exceeding 1.5m but not exceeding 3m in depth for shafts, cesspits, manholes, pier holes, etc and getting out in any type of soil complete all as specified.

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

Removing excavated material not exceeding 50m and depositing where directed at a level not exceeding 1.5m above the starting point and entire satisfaction of Engnr-in-Charge complete all as specified and directed

Sand dry clean as cushioning to underground electric cable provided with a layer of 80mm deep before laying and 150mm over cable laid in trenches complete all as speficied.

Supply & Laying reiforced precast concrete cable cover, class EHV, type 1 with peak, size 450mm x 230mm x 50mm thick complete all as specified.

Supply, Laying, jointing and testing of under ground cables XLPE insulated screened PVC bedded galvanized steel strips armoured electric power cable (heavy duty) with aluminium conductor HT 11000 volts grade and cross sectional area 95 sqmm 3 core conforming to latest IS and ISI marked including taking out existing cable complete all as specified and directed by Engrr-in-Charge,

Supply and Fixing of root indicator For HT Cable marked with HT Cable along the rout of laying of cabe at the distance of every 10 mtr complete all as specified and directed by Eng In Charge.

Steel tubing galvanized (Light grade) 80mm bore conforming to IS -1239 for passing cable under road /floor or fixing to poles for protection of underground cable complete with flat iron 50x6 mm clamps made to shape and 12mm dia bolts, nuts and washers for fixing where required. NOTE:- Excavation and earth work shall be measured and paid separatly,

Supply and fixing in repairs earth continuity conductor or main earthing lead fixed to walls on batten or recess or chesses or buried in ground or fixed to poles or any other indicated situation for loop earthing with using 32 x 6 mm dia GI strip, complete all as specified and directed.

Note:- Schedule of credit Rs. 2,08,595.00 will be deducted from total amount quoted while accepting the bid. Details of schedule of credit is given in tender documents.

MAMTA ENTERPRISES

ASHOKA ENGINEERS AND BUILDERS