COMPREHENSIVE MAINTENANCE OF HT EQUIPMENTS AND REPAIR OF HT NETWORK AT SI LINES UNDER GE BHOPAL

Amount

Disconnecting all existing connection with transformer and taking down and shifting transformer upto 1600 kVA from any substation/ MES store yard under the GE to new location with help of Hydra (Recovery)/JCB/ Crane/Truck etc. and including installation at new location including connecting all connections, earthings, conductors, cables, nuts, bolts, washers etc. complete all as specified and as directed. Note: The contractor shall excute the item within two days after receipt of order from the Engineer-in-Charge. The compensation shall be levied @ ₹2500/ - per day beyond 2 days.

M & L for rewinding of coils on primary/ secondary side of transformer of any capacity using proper size, muitiple(triple) paper covering, special (S) copper winding wires conforming to IS 7404 (Part-1): 1991 as per existing size, turns and insulation class including connecting minor insulation materials suitable for any voltage level of transformer on primary and secondary side complete all as specified and as directed. (Note: - Weight of only winding wire shall measured for payment purpose.)

Disconnecting, opening of transformer of capacity 100 kVA to 1600 kVA, 33/11 kV & 11 KV/415 volts, outdoor type of any make after unscrewing nuts & bolts, screws and connected, dismantling carefully connected accessories and removing primary and secondary terminals, top cover, conservator tank, temp gauge, breather, neutral earth strips and draining out transformer oil to the required level and storing carefully in cleaned containers (to be arranged by contractor) etc. for replacement of defective parts such as replacement of leaking gaskets, replacement of worn out/burnt out studs, checking and cleaning of contacts of tap changer and re-assembling the transformer after replacing the defective parts, testing complete all as specified and as directed. Note: - (a) Transformer oil shall be drained out by the contractor in suitable capacity mild steel drums to be arranged by the contractor. The said drained out transformer oil shall be refilled in the transformer duly dehydrated after repair and the cost thereof shall be included in unit rate quoted against the respective item of this schedule and paid separately. (b) The spare parts excluding nuts, bolts, washer, gasket etc. shall be measured and paid for separately. (c) Testing of transformer after repair shall be carried out as per IS 2026 (Part 1): 2011 and testing as specified and the cost of testing shall be deemed to be included in unit rate quoted against this item.

S & F in repairs 12 kV or 17.5 kV/ 250 A bushing with copper stem including both porcelain parts and metal parts with accessories as per IS 3347 Part 3 (section 1 & 2) complete all as specified and as directed.

S & F in repairs upto and including 1.1 kV/ 250 A bushing with copper stem including both porcelain parts and metal parts with accessories as per IS 3347 Part 1 (section 1 & 2) complete all as specified and as directed.

S & F in repairs 12 kV or 17.5 kV/ 630 A bushing with copper stem including both porcelain parts and metal parts with accessories as per IS 3347 Part 3 (section 1 & 2) complete all as specified and as directed.

S & F in repairs 25 mm dia gunmetal drain valve of transformer as per existing one along with brass/ gun metal dummy cap complete all as specified and as directed.

M & L for replacement of silica gel, indicating type, 4 to 6 mm standard size of the particle, blue colour for transformer of any capacity complete all as specified and as directed.

S & F in repairs silica gel breather containing 500 gms silica gel, indicating type, 4 to 6 mm standard size of the particle, blue colour silica, breather body made out of aluminium pressure die cast, shot blasted and powder coated, container and oil cup made out of 143R grade UV resistant polycarbonate, all gaskets made out of nitrile cork (RC 70C) rubber, flanged type. breather piping doesn’t include any valve between conservator and breather, removable type mounted at suitable height from ground level, tested for 0.35 kg / cm for all joints complete all as specified and as directed.

S & F in repairs silica gel breather containing 1000 gms silica gel, indicating type, 4 to 6 mm standard size of the particle, blue colour silica, breather body made out of aluminium pressure die cast, shot blasted and powder coated, container and oil cup made out of 143R grade UV resistant polycarbonate, all gaskets made out of nitrile cork (RC 70C) rubber, flanged type. breather piping doesn’t include any valve between conservator and breather, removable type mounted at suitable height from ground level, tested for 0.35 kg / cm for all joints complete all as specified and as directed.

Taking out old unserviceable off load tap changer from 11 kV / 433 V Transformer & Supply and fix new off load tap changer suitable for 11 kV/ 433 V Transformer and as per the existing one complete all as specified and as directed.

S & F in repairs hot rolled medium and high tensile structural steel of grade E 250 quality C conforming to IS 2062: 2011 as in plates (plain or chequered) channels, square cut or notched (ordinary and counter sunk) forming holes, without any attachment complete all as specified and as directed.

S & F in repairs temperature gauge of range 0⁰ to 200⁰C for indication of temperature rise in transformer oil for transformers upto 2000 kVA capacity complete all as specified and as directed.

Filtration, Dehydration, reconditioning of transformer oil by using filtering equipment, vacuum dehydrator etc. to obtain minimum break down voltage of 60 kV and maximum water content of 30 mg/kg as per IS 1866: 2017 and IEC 60422: 2013 complete all as specified and as directed.

Supply and fill unused mineral insulating oils conforming to IS 335: 2018, Type II Class (Transformer oils), Uninhibited (U), pour point -10⁰C, vacuum filtered in a laboratory, Breakdown voltage of min 70 kV at 2.5 mm gap complete all as specified and as directed.

Carrying out field test of transformer oil for visual inspection (colour and appearance), break down voltage, water content and acidity before and submission of report all as per IS 1866: 2017 and IEC 60422: 2013 complete all as specified and as directed.

Disconnecting existing incoming & outgoing connections and repair, overhauling and maintenance of VCB, 11 kV, vertical or horizontal isolation, installed with receiving, distribution system and capacitor bank including checking of different functional parts and setting/ calibration of VCB installations all as per Item No 17 here-in-before but 11 KV VCB complete all as specified and as directed.

Disconnecting existing incoming & outgoing connections and repair, overhauling and maintenance of (Compact Sub station incl 250 KVA Dry type Transformer at CEBZ office complex) VCB, 11 kV, vertical or horizontal isolation, installed with receiving, distribution system and capacitor bank including checking of different functional parts and setting/ calibration of VCB installations all as per Item No 17 here-in-before but 11 KV VCB complete all as specified and as directed.

Disconnecting and dismantling indoor type 11 kV CTs carefully at site and supplying Installing, testing and commissioning 11 kV current transformer indoor type, epoxy resin, cast dry type all as per IS 16227 for outgoing feeder, ratio 60/30 /5-5 Amp 15 VA, Class-1 for metering 5P 20 for protection including PI, IR testing with removing of existing CTs complete all as specified and directed.

Supply and fix in repairs alarm annunciator 24 volts DC suitable for 33 kV control panel and 11 kV VCB panel complete all as specified and as directed.

Supply and fix in repairs tripping coil 24 V DC for 11kV VCB panels complete all as specified and as directed.

Supply and fix in repairs 24 V AC DC hooter for 11 kV VCB panels complete all as specified and as directed.

S & F in repairs digital type voltmeter suitable for 11 kV breaking range (0-11 kV) suitable for auxiliary voltage 230 volts complete all as specified and as directed.

S & F in repairs digital type ammeter suitable for 11 kV breaking range (0-400 A) suitable for auxiliary voltage 230 volts complete all as specified and as directed.

S & F in repairs panel door lock suitable for panels locking arrangement complete all as specified and as directed.

S & F in repairs push button suitable for 33 / 11 kV VCB control panels complete all as specified and as directed.

S & F in repairs connector for CT and PT and breaker connection complete all as specified and as directed.

S & F in repairs tripping and closing handle type switch suitable for 33/ 11 kV VCB panel complete all as specified and as directed.

S & F in repairs LED indication Lamp R, Y & B colour coding suitable for 33/ 11kV VCB panel complete all as specified and as directed.

M & L for chemical earthing with earth electrode made of low carbon steel circular rods, molecularly bonded with copper on outer with minimum thickness of 250 micron, 17 mm dia, 3 metre long including drilling of bore hole of 150 mm dia of 20 metre depth, filling the bore hole with black cotton soil up to 17 metres level i.e. below the electrode bottom level, placing electrode by penetrating 150 mm into black cotton soil, filling earth enhancement material (minimum approx 30 kg) into the augured hole in slurry form and allowed to set, minimum 125 mm dia covering of the composite structure (earth electrode + earth enhancement material), covering remaining portion with backfill soil/ material, welding copper strip of 150 mm X 25 mm X 6 mm to electrode, construction earth pit including testing complete all as specified and as directed.

Supply only 33 kV of copper tinned metal, having capacity tag on every fuse with rated HT fuses barrel type of capacity 20 Amps complete all as specified and as directed.

Supply only 33 kV of copper tinned metal, having capacity tag on every fuse with rated HT fuses barrel type of capacity 10 Amps complete all as specified and as directed.

Supply only 11 kV of copper tinned metal, having capacity tag on every fuse with rated HT fuses barrel type of capacity 40 Amps complete all as specified and as directed.

Supply only 11 kV of copper tinned metal, having capacity tag on every fuse with rated HT fuses barrel type of capacity 30 Amps complete all as specified and as directed.

Supply only 11 kV of copper tinned metal, having capacity tag on every fuse with rated HT fuses barrel type of capacity 20 Amps complete all as specified and as directed.

Supply only 11 kV of copper tinned metal, having capacity tag on every fuse with rated HT fuses barrel type of capacity 15 Amps complete all as specified and as directed.

Supply only 11 kV of copper tinned metal, having capacity tag on every fuse with rated HT fuses barrel type of capacity 10 Amps complete all as specified and as directed.

M& L for cleaning of transformer yard, four pole, three pole, two pole structure, area dressing, removing vegetation/ shrubs/ bushes etc. complete all as specified and as directed.

M & L for spray painting of transformers (any type power or distribution)) of capacity upto and including 250 kVA (in situ) outdoor type, installed and located at different sites in scattered area under the GE complete all as specified and as directed including the following: - (a) Removal of grease, oil and other contaminants using de-greasing solvent. (b) De-rusting of surface and cleaning manually by scrubbing and wire brushing. (c) Washing thoroughly and dry properly. (d) Applying two coats of zinc phosphate primer by spray machine (e) Final painting of two coats with synthetic enamel paint by spray machine over priming coat. (f) the colours of painting shall be (i) grey for transformer body, (ii) red, yellow & blue for HT bushing, (iii) red, yellow, blue & black for LT bushing, (iv) red for drain plug, (v) white for writing SM/ MES No., location, area feeding (in short) over the body of transformer.

M & L for spray painting of transformers (any type power or distribution)) of capacity above 300 kVA and upto and including 500 kVA (in situ) outdoor type, installed and located at different sites in scattered area under the GE complete all as specified and as directed including the following: - (a) Removal of grease, oil and other contaminants using de-greasing solvent. (b) De-rusting of surface and cleaning manually by scrubbing and wire brushing. (c) Washing thoroughly and dry properly. (d) Applying two coats of zinc phosphate primer by spray machine (e) Final painting of two coats with synthetic enamel paint by spray machine over priming coat. (f) the colours of painting shall be (i) grey for transformer body, (ii) red, yellow & blue for HT bushing, (iii) red, yellow, blue & black for LT bushing, (iv) red for drain plug, (v) white for writing SM/ MES No., location, area feeding (in short) over the body of transformer.

M & L for spray painting of transformers (any type power or distribution)) of capacity Upto 1600 kVA (in situ) outdoor type, installed and located at different sites in scattered area under the GE complete all as specified and as directed including the following: -(a) Removal of grease, oil and other contaminants using de-greasing solvent. (b) De-rusting of surface and cleaning manually by scrubbing and wire brushing. (c) Washing thoroughly and dry properly. (d) Applying two coats of zinc phosphate primer by spray machine (e) Final painting of two coats with synthetic enamel paint by spray machine over priming coat. (f) the colours of painting shall be (i) grey for transformer body, (ii) red, yellow & blue for HT bushing, (iii) red, yellow, blue & black for LT bushing, (iv) red for drain plug, (v) white for writing SM/ MES No., location, area feeding (in short) over the body of transformer.

M & L for preparing and painting on two poles structure of steel tubular swaged of any type and any length including cross arms, GI brackets, PCC coping complete all as specified and as directed comprising the following: - (a) Two coats of synthetic enamel paint in white colour over a coat of primer on PCC coping (b) Making 4 Nos of strips of 30 cm wide in alternate red and white colour using two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer (c) Providing 30 cm wide retro reflective sheet of 30 cm wide, grade 1, pressure bonding type, red colour as per IS 14221: 1995 (d) Two coats of synthetic enamel paint in red colour over a coat of primer from top of electric pole to downward upto 1 metre length including cross arms, GI brackets etc. (e) Writing pole number and voltage level encompassed by circle of suitable dia using two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer (the colour of base shall be black and the colour of font shall be white). Number and voltage level shall be handwritten, and circle shall be stencilled. (f) Painting with two coats of aluminium paint over a coat of aluminium red oxide primer on remaining exposed portions.

M & L for preparing and painting on four poles structure of steel tubular swaged of any type and any length including cross arms, GI brackets, PCC coping complete all as specified and as directed comprising the following: - (a) Two coats of synthetic enamel paint in white colour over a coat of primer on PCC coping (b) Making 4 Nos of strips of 30 cm wide in alternate red and white colour using two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer (c) Providing 30 cm wide retro reflective sheet of 30 cm wide, grade 1, pressure bonding type, red colour as per IS 14221: 1995 (d) Two coats of synthetic enamel paint in red colour over a coat of primer from top of electric pole to downward upto 1 metre length including cross arms, GI brackets etc. (e) Writing pole number and voltage level encompassed by circle of suitable dia using two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer (the colour of base shall be black and the colour of font shall be white). Number and voltage level shall be handwritten, and circle shall be stencilled. (f) Painting with two coats of aluminium paint over a coat of aluminium red oxide primer on remaining exposed portions.

M & L for preparing and painting on steel tubular swaged pole of any type and any length including cross arms, GI brackets, PCC coping complete all as specified and as directed comprising the following: - (a) Two coats of synthetic enamel paint in white colour over a coat of primer on PCC coping (b) Making 4 Nos of strips of 30 cm wide in alternate red and white colour using two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer © Providing 30 cm wide retro reflective sheet of 30 cm wide, grade 1, pressure bonding type, red colour as per IS 14221: 1995 (d) Two coats of synthetic enamel paint in red colour over a coat of primer from top of electric pole to downward upto 1 metre length including cross arms, GI brackets etc. € Writing pole number and voltage level encompassed by circle of suitable dia using two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer (the colour of base shall be black and the colour of font shall be white). Number and voltage level shall be handwritten, and circle shall be stencilled. (f) Painting with two coats of aluminium paint over a coat of aluminium red oxide primer on remaining exposed portions.

Disconnecting, taking out old unserviceable under ground cable of rated voltage 6.35 kV/ 11 kV, upto any size of nominal cross sectional area of main conductor, upto 3 core, any type from trenches including taking out concrete cable cover/ bricks etc. including removing materials to store for keeping in safe custody or for reuse or for taking credit complete all as specified and as directed.

Excavating in trenches not exceeding 1.5 m wide and not exceeding 1.5 m in depth; for foundation, etc. or for shafts, wells, cesspits, manholes, pier holes, etc. or for cable laying or not exceeding 10 sqm on plan and not exceeding 1.5 m in depth and getting out in hard/ dense soil complete all as specified and as directed.

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25 cm in soft/ loose/ hard/ dense soil complete all as specified and as directed.

Removing excavated material (soils) not exceeding 50 m and depositing where directed at a level n exc. 1.5 m above the starting point complete all as specified and as directed.

Supply & spreading in trenches dry river sand cushioning to underground cable in trenches including spreading, levelling, hand punning down complete all as specified and as directed. Note:- Depth of sand cushioning will be measured after punning down and levelling the sand properly.

Supply & laying unreinforced precast concrete cable cover class HV type 1, flat shape, dimension 300 mm X 180 mm X 40 mm as per IS 5820: 1970 complete all as specified and as directed.

Supply, laying and testing cross linked polyethylene (XLPE) insulated, PVC sheathed cables for working voltages 6.35 kV/ 11 kV, three phase, earthed system, 3 core, screened, armoured power cable, 120 sqmm of nominal area of conductor, aluminium conductor, ISI marked as per IS 7098 (Part-II): 2011 laid in trenches or under floors making all connections with necessary glands lugs bushing complete all as specified and as directed.

Dismantling cross-arms of mild steel channel or angle sections etc. complete and setting aside for re-use or removing to store or for schedule of credit complete all as specified and as directed.

M & L for cross arms, bracings, supports, clamps, back plates and stay clamp 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 applying two coats of aluminium paint over a coat of red oxide primer complete all as specified and as directed.

Dismantling insulators any type, any size complete all as specified and as directed.

S & F 11 kV polymeric composite pin insulator, conforming to IEC 61109, material of core (FRP rod): borron free ECR, material of sheds: silicon rubber, material of top end fittings: spheroidal graphite cast iron, malleable cast iron or forged steel, material of bottom end fittings: forged steel, sealing compound for end fitting: RTV Silicon, colour of sheds: grey, rated voltage: 11 kV, highest voltage: 12 kV, dry power frequency withstand voltage: 60 kV, wet power frequency withstand voltage: 35 kV, dry power frequency flashover voltage: 75 kV, wet power frequency flashover voltage: 45 kV, dry lightning impulse withstand voltage: (a) Positive: 75 kV, (b) Negative: 80 kV, dry lightning impulse flashover voltage: (a) Positive: 95 kV, (b) Negative: 100 kV, RIV at 1 MHz when energised at 10 kV / 30 kV (rms) under dry condition < 50 microvolt, creepage distance (minium): 300 mm, minimum failing load: 5 kN complete all as specified and as directed.

S & F 11 kV polymeric composite disc insulator, conforming to IEC 61109, material of core (FRP rod): borron free ECR, material of sheds: silicon rubber, material of end fittings: spheroidal graphite cast iron, malleable cast iron or forged steel, sealing compound for end fitting: RTV Silicon, colour of sheds: grey, rated voltage: 11 kV, highest voltage: 12 kV, dry power frequency withstand voltage: 60 kV, wet power frequency withstand voltage: 35 kV, dry power frequency flashover voltage: 75 kV, wet power frequency flashover voltage: 45 kV, dry lightning impulse withstand voltage: (a) Positive: 75 kV, (b) Negative: 80 kV, dry lightning impulse flashover voltage: (a) Positive: 95 kV, (b) Negative: 100 kV, RIV at 1 MHz when energised at 10 kV / 30 kV (rms) under dry condition < 50 microvolt, creepage distance (minium): 300 mm, minimum failing load: 45 kN complete all as specified and as directed.

Supply and fix in repairs metal oxide surge arrester without gap for AC system as per IEC 60099-4: 2014, outdoor type, polymer housing, single column and single phase construction, station class, medium duty, nominal discharge current 10 kA, switching impulse discharge current 1 kA, repetitive charge transfer rating (Qrs) more than 1.6 C, thermal energy rating (Wth) more than 7 kJ/kV, nominal system voltage 33 kV, highest system voltage 36 kV, rated voltage of arrester 27 kV, continuous operating voltage 21.6 kV, temporary overvoltage (30.45 kV for 1 s, 28.50 kV for 10 s, 26.35 kV for 100 s), rated short circuit current 20 kA, low short circuit current 600 A, insulation withstand level (lightning impulse voltage 1.2/ 50 µs) 170 kV, lightning impulse residual voltage (8/20 µs) at nominal discharge current maximum 70 kV, switching impulse residual voltage (30/60 µs) at switching impulse discharge current maximum 57 kV, high current impulse withstand capability (4/10 µs) 100 kA, minimum creepage distance 900 mm complete all as specified and as directed.

M & L for cement concrete M15 (Nominal Mix) using 20 mm nominal size graded crushed stone aggregate in lintels upto 1.5 m clear span, cills, steps; seismic and other similar bands, plinth courses, string courses, lacing courses, parapets and railings upto 60 cm in height, copings, kneelers, apex stones, bed plates, kerbs, water troughs, slab staging for water tanks, filling of pressed steel door frame, fixing of hold fasts and the like including weathering, slightly rounded or chamfered angles and throating including necessary formworks complete all as specified and as directed.

Supplying & laying including taking down in trenches, in road cutting and along pole 100 mm nominal bore, light grade, galvanised coated steel tube conforming to IS 1239 (Part-1): 2004 including all fittings conforming to IS 1239 (Part-2): 2011 complete all as specified and as directed.

M & L for trimming of branches of trees touching HT/LT Electric over head line and making clear about 3 m in radius and carrying and disposal where directed not exceeding 50 m complete all as directed. Note : (i) Tree branches etc will be left as idle the wood belongs to Cantt board/DEO and they will be responsible for the wood & disposal where directed not exceeding 50 m complete all as directed. (ii) Contractor will employ sufficient labour to complete the full one job with in about 15 days. (iii) Contractor will responsible for any type of accident while trimming the trees. (iv) Contractor supervisor will take proper shut down from MES installation before starting the work and clear it before resuming power supply, however full assistance will be provided by MES staff. Note :- Vehicle and othe T&P shall be arranged by the contractor at own cost.

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 120 sqmm to 185 sqmm complete all as specified and as directed.

S & F XLPE cable end termination, heat shrinkable, outdoor type complete with jointing material and accessories suitable for voltage 6.35 kV/ 11 kV (Earthed), 3 core, 120 sqmm to 185 sqmm complete all as specified and as directed.

S & F XLPE cable end termination, heat shrinkable, indoor type complete with jointing material and accessories suitable for voltage 6.35 kV/ 11 kV (Earthed), 3 core, 120 sqmm to 185 sqmm complete all as specified and as directed.

Dismantling ACSR or AAC conductors removing to store or taken on schedule of credit complete all as specified and as directed.

Supply, fixing and stringing ACSR (aluminium conductor galvanized steel-reinforced) of any size and type in accordance with site requirement and binding on insulator by means of 22 gauge aluminium binding wire to permissible sag complete all as specified and as directed.

Restringing only ACSR (aluminium conductor galvanized steel-reinforced) of any size and type in accordance with site requirement and binding on insulator by means of 22 gauge aluminium binding wire to permissible sag complete all as specified and as directed.

Supply and fix in repairs DO fuse assembly, suitable for horizontal and vertical operation, triple pole mounted on polymer HT insulator 6 Nos and mild steel galvanised steel frame rating upto 200 Amp, 33 kV complete with DO fuse and electrical connections, jumpering by ACSR conductor and connectors complete all as specified and as directed.

Supply and fix in repairs DO fuse assembly, suitable for horizontal and vertical operation, triple pole mounted on polymer HT insulator 6 Nos and mild steel galvanised steel frame rating upto 200 Amp, 11 kV complete with DO fuse and electrical connections, jumpering by ACSR conductor and connectors complete all as specified and as directed.

S & F in repairs gang operated air break switch as per IEC 62271-103 amended upto date, rocking/ tilting type, suitable for both horizontal and vertical mounting, three poles, outdoor type, nominal system voltage 11 kV, rated voltage 12 kV, rated frequency 50 Hz, continuous current rating 400 Amps, rated short time withstand current for three seconds 25 kA, rated peak withstand current for three seconds 62.5 kA, rated lightning impulse withstand voltage (i) to earth and between poles 75 kV (Peak) (ii) across the isolating distance 85 kV (Peak), power frequency withstand voltage between (i) earth & poles 28 kV (rms) (ii) across the isolating distance 32 kV (rms), minimum isolating distance in open position 310 mm, phase to phase clearance 750 mm, minimum cross sectional area of fixed contact 300 sqmm, minimum cross sectional area of moving contact 250 sqmm, copper connector having minimum cross sectional area of 250 sqm, maximum current density of 1.6 Amps/ sqmm for all current carrying parts, single number of brake per phase, medium grade galvanised iron pipe of 32 mm nominal bore and 5 to 6 metre length in single piece for operating pipe, pad-locking in both ‘on’ and ‘off’ positions with indicators, electroplated nonferrous parts, hot dip galvanised ferrous parts, 3 Nos polymer post insulator per phase as per IEC 61109 amended upto date having rated voltage 12 kV, minimum creepage distance 300 mm, impulse withstand voltage 75 kV, wet power frequency withstand voltage 35 kV, dry wet power frequency withstand voltage 35 kV complete all as specified and as directed.

M& L for servicing of 11 kV gang operated air break switch by cleaning the contact, pin insulator with CTs and applying petroleum jelly at the contact point and down rod links for smooth operation including replacing the rusted, corroded bolts, nuts (using galvanised iron nuts) along with replacing the burn aluminium thimbles and defective insulators, male and female contact as required at the site complete all as specified and as directed. Note: - (1) Insulator, male (moving) and female (fixed) contact shall be measured and paid separately under the relevant items. (2) The cost for replacement of aluminium thimbles, GI nuts, bolts, washers, lubricating, materials etc. shall be deemed to be included in the unit rate quoted by the contractor for the item.

S & F in repairs ACSR (aluminium conductor galvanized steel-reinforced) of any size and type in accordance with site requirement in and binding on insulator by means of 22 gauge aluminium binding wire complete all as specified and as directed.

M & L in repairs for danger notice plate of 1.6 mm thick mild steel sheet, vitreous enamelled white, with letters, figures and conventional skull and bones in signal red colour and fixed with mild steel clamps, bolts and nuts of approved size, for HT, 250 mm X 200 mm complete all as specified and as directed.

S & F in repairs nominal 6 mm thick insulating mats of size 2 m X 1 m, made of elastomer conforming to IS-15652: 2006 and meeting the requirement of IS- 5216 (Part -1 & 2), IS 8437, IEC-479 Pub -1 along with suitable adhesive/ homebound, PV resin water proofing compound and sealing material as per recommendation of Annex 'A’, Clause- 'C’ of IS- 15652 and suitable for class - B upto 11 kV complete all as specified and as directed.

S & F in repairs overhead line insulation sleeve made of silicone of suitable dia of 12 mm, 15 mm, 20 mm, 25 mm, 30 mm and 35 mm for conductor size of 25-50 sqmm, 70-95 sqmm, 120-150 sqmm, 185-240 sqmm, 300-400 sqmm and 500 sqmm, respectively, thickness 3 mm, dielectric strength 13 Kv/ mm, volume resistivity 1 X 1015 ohm cm, red, yellow and black colour complete all as specified and as directed.`

S & F in repairs copper wire braided strip suitable for 33 kV / 11 kV AB switch complete all as specified and as directed.

Supply only pressure sensitive adhesive plasticized PVC tapes with non-thermosetting adhesive, designation F-PVC/90/0/Tp, general purpose application for electrical insulation, plasticized polyvinylchloride backing material, thickness 0.125 mm, width 25 mm, length 20 metre all as per o IS 7809 (Part 3/section 1): 1986 complete all as specified and as directed.

Supply and fixing 32 mm X 6 mm galvanised mild steel strip for horizontal conductors and down conductors including suitable design of fixing components of galvanised steel as per fig 28 of IS 2309: 1989 complete all as specified and as directed.

S & F in repairs OC/EF electronic numerical digital relay suitable for 11 /33 KV VCB panel of Auxilary supply 24-240V AC / DC, CT rating 1A/5A, current rating 8A, 240 V AC, 50 Hz complete all as specified and as directed.

S & F in repairs master strip, electronic digital relay suitable for 11 /33 KV VCB panel complete all as specified and as directed.

M&L for precast cable route Indicator made out of cement concrete 1:2:4, type B1, using (20mm graded stone aggregate) having 15cm square shape at top and 30cm square shape at bottom and total height of 100cm casted as per direction of Engineer-in-Charge and grouted into PCC 1:2:4, type B-1, 50cm below ground level as per site requirement including embossed with "HT 11kV Cable" and also painting in synthetic enamel Paint and necessary excavation and earth work in any type of soil as complete all as specified and as directed.

M& L of factory made RCC Earth pit chamber with cover of size 450x450x300 mm & 50 mm thick complete all as specified and as directed.

M & L for replacement of core of transformer of any capacity using proper size stack / wound type generally of High-grade, cold-rolled grain-oriented silicon steel with low hysteresis loss and high permeability, coated with hot oil proof insulation, bolted together and to the frames firmly to prevent vibration or noise.The core construction must conform to relevant standards such as IS:3024-1965 for electrical sheet steel and IS:649-1983 for methods of testing steel sheets. The complete design of core must ensure permanency of the core losses with continuous working of the transformers. Laminations are fastened, and the core and windings must be securely fixed to prevent movement during transport or operation. The value of the maximum flux density allowed in the design and grade of lamination used be clearly stated in the offer. The bidder should offer the core for inspection and approval by the purchaser during manufacturing stage. Bidder’s shall give notice for inspection with the following documents as applicable as a proof towards use of prime core material complete all as specified and as directed.

PRADEEP TIWARI CONTRACTOR (BID ID -3493392)