REPAIR AND MAINTENANCE OF TRANSFORMER AND ALLIED WORKS UNDER AGE EM SI LINES BHOPAL UNDER GE BHOPAL

Amount

Disconnecting, taking out old unserviceable under ground cable of rated voltage 11 kV, nominal cross sectional area of main conductor 95 sqmm, upto 4 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 (credit for above items should be made as per conditions separately) all as specified and directed by the Engineer-in-Charge.

Disconnecting, taking out old unserviceable under ground cable of rated voltage 1100 V, nominal cross sectional area of main conductor 150 sqmm, upto 4 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 taking credit (credit for above items should be made as per conditions separately) all as specified and directed by the Engineer-in-Charge.

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 soft/ loose 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

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

M & L for laying of bricks locally available sub class 'B' bricks, non-modular sizes as per IS 1077: 1992 for cable protection cover laid flat and dry in trenches over the cable perpendicular to the direction of cable all as directed.

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 95 sqmm complete all as specified and as directed.

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 complete all as specified and as directed.

S & F gang operated air break switch, three poles, outdoor type, nominal system voltage 11 kV, rated voltage 12 kV, rated normal current 200 Amps, rated frequency 50 Hz, rated one minute power frequency withstand voltage between (i) earth & poles 28 kV (rms) (ii) across the isolating distance 32 kV (rms), rated lightning impulse withstand voltage (i) to earth and between poles 75 kV (Peak) (ii) across the isolating distance 85 kV (Peak), Rated short-time withstand current 25 kA for 3 seconds, rated peak withstand current 63 kA for climatic conditions at the site, mechanically operated mounted on insulator and steel frame with operating mechanism worked from ground level for current complete all as specified and as directed.

S & F in repairs silica gel breather including silica gel, indicating type, 4 to 6 mm standard size of the particle, blue colour for transformer of capacity exceeding 1000 kVA and upto and including 1500 kVA complete all as specified and as directed.

S & F in repairs silica gel breather including silica gel, indicating type, 4 to 6 mm standard size of the particle, blue colour for transformer of capacity exceeding 2000 kVA and upto and including 2500 kVA complete all as specified and as directed.

S & F silica gel, indicating type, 4 to 6 mm standard size of the particle, blue colour for transformer of any capacity.

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.

S & F anti-climbing device; spikes type fabricated out of mild steel bars (round, square and flat) including nuts, bolts, washers and welding in two halves made to shape to suit the cross section of the pole complete all as specified and as directed.

S & F galvanised mild steel wire 3.15 mm or 4 mm dia in overhead lines complete all as specified and as directed.

S & F in repairs porcelain pin insulator, Type B, Nominal System voltage 11 kV, highest system voltage 12 kV, visible discharge test voltage 9 kV, wet power frequency withstand voltage 35 kV, power frequency puncture withheld voltage 105 kV, impulse withstand voltage 75 kV, minimum total creepage distance 230 mm, minimum failing load 5 kN, of suitable size with galvanised steel insulator pin, nut, washers complete all as specified and as directed.

S & F in repairs porcelain disc insulator, ball and socket type, Type B, Nominal System voltage 11 kV, highest system voltage 12 kV, visible discharge test voltage 9 kV, wet power frequency withstand voltage 35 kV, impulse withstand voltage 75 kV, minimum total creepage distance 230 mm, minimum failing load 70 kN, of suitable size with galvanised steel stud pin, nut, washers complete all as specified and as directed.

Supply and erection in repairs of three piece metal oxide lightning arrestor suitable for 11 kV continuous operating voltage (3 phase) with rated voltage 12 kV (rms) with nominal discharge current rating of 2.5 kA and complete with galvanised clamping arrangements, GI bolts, nuts, washers etc. complete 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 directed by Engineer- in-charge.

M & L for cement concrete in foundation, filling and mass concrete in M10(Nominal Mix) using 40 mm nominal size graded crushed stone aggregate 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.

M & L for preparing and painting and painting on steel tubular swaged pole 410 SP-55 (11.00 metre long) including cross arms, GI brackets with two coats of aluminium paint over a coat of aluminium red oxide primer on exposed portion and including making strips of width 30 cm upto 1.5 m from the ground level in black and yellow shade in alternate layer including numbering of poles using two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer complete all as specified and as directed.

M & L for preparing and painting and painting on steel tubular swaged pole 410 SP-31 (9.00 metre long) including cross arms, GI brackets with two coats of aluminium paint over a coat of aluminium red oxide primer on exposed portion and including making strips of width 30 cm upto 1.5 m from the ground level in black and yellow shade in alternate layer including numbering of poles using two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer complete all as specified and as directed.

S & F horn gap fuse with polymer insulator, nominal system voltage 11 kV, three pole, rated voltage 12 kV, rated frequency 50 Hz, continuos current rating 100 Amps, lightning impulse withstand voltage (positive & negative polarity) across the isolating distance 85 kV & between earth and poles 75 kV, power frequency withstand voltage (dry & wet) across the isolating distance 32 kV & between earth and poles 28 kV, contact clearance 225 mm, outdoor type, aluminium strip of size 30 mm X 5 mm X 425 mm including 2 Nos 11 kV polymer pin insulator as per IEC 61109-2008, minimum failing load 5 kN, minimum total creepage distance 320 mm and including mild steel channel as per IS 2062: 2011 base of suitable size for horizontal or vertical mounting 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 including the following: - (a) preparation of old surfaces by cleaning, scrapping, rubbing/ polishing etc. complete. (b) Spray painting with two coats of synthetic enamel paint of approved make / quality all as directed at site. (c) Writing the SM MES No of transformer on MS body of transformer all as directed .

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 including the following: - (a) preparation of old surfaces by cleaning, scrapping, rubbing/ polishing etc. complete. (b) Spray painting with two coats of synthetic enamel paint of approved make / quality all as directed at site. (c) Writing the SM MES No of transformer on MS body of transformer all as directed.

S & F in repairs porcelain line post insulator, Type B, Nominal System voltage 33 kV, highest system voltage 36 kV, visible discharge test voltage 27 kV, wet power frequency withstand voltage 75 kV, power frequency puncture withheld voltage 180 kV, impulse withstand voltage 170 kV, minimum total creepage distance 580 mm, minimum failing load 10 kN, of suitable size with galvanised steel stud pin, nut, washers complete all as specified and as directed.

Taking up or down 40 mm or 50 mm bore of steel tubing and connections, including cleaning for refixing or removal to store or taken on schedule of credit complete all as specified.

Supplying & fixing to walls and ceilings or laid in floors 40 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.

S & F hot rolled medium and high tensile structural steel of grade E 250 quality C conforming to IS 2062: 2011 as in joist, channel, angle, or tee sections, fixed independently, without connecting plates, etc. (cut to ordinary lengths i.e. within 20 mm of the length indicated) complete all as specified and as directed.

Preparation of old steel surfaces of any description, over 10 cm width or girth and applying two coats of synthetic enamel paint over a coat of red oxide zinc chrome primer as in old rafters, purlins and channels etc. complete all as specified and as directed by Engineer-in-Charge.

Calibration and testing of combined inverse time over current earth fault and instantaneous relay for checking and cleaning and insure physical healthiness with visual check for healthy tripping of over current and earth fault setting tripping timer ratio setting instantaneous time setting etc. as per installed capacity of transformers with artificial current injunction on primary & secondary with current injunction machine complete all as directed.

Testing of over current & earth fault IDMT relays as per time/ current characteristics by secondary injection test at 50%, 75%, 100 % plug setting and operating time at twice the set value & TMS 1 and calibrating including well cleaning and decarbonizing of relay contacts.

Disconnecting, taking down distribution transformer outdoor type 11 kV /415 volts having capacity 100 kVA, 150 kVA, 200 kVA, 250kVA and 315 kVA, transportation to the workshop for repairs including opening of transformers cover, draining of oil, de-tanking of core and coil assembly, cleaning, washing of dust and dirt from all parts including core, tank and cooling tubes radiators etc., joint inspection for estimate, replacement of defective parts, assembly, stage inspection, re-tanking, oil filtration/ dehydration, fill dehydrated oil and fresh oil and testing the repaired transformers for all the routine tests as per IS 2026 (Part 1): 2011 with latest amendments. 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. (b) Rewinding of both HT & LT coil shall be measured and paid for separately under respective item of this schedule. (c) Transportation charges for transportation of transformer from site to workshop and after repair, workshop to site shall be borne by the contractor and cost thereof shall be deemed to be included in the unit rate quoted for this item. (d) The spare parts excluding nuts, bolts, washer shall be measured and paid for separately (e) The said transformer shall be repaired in reputed workshop as decided by the GE. (f) Testing of transformer after repair shall be carried out as per IS 2026 (Part 1): 2011 and the cost of testing shall be deemed to be included in unit rate quoted against this item. (g) The IR value of the dried winding before inserting the core in the shell shall be measured and recorded.

Disconnecting, taking down distribution transformer outdoor type 11 kV /415 volts having capacity 400 kVA, 500 kVA and 630 kVA, transportation to the workshop for repairs including opening of transformers cover, draining of oil, de-tanking of core and coil assembly, cleaning, washing of dust and dirt from all parts including core, tank and cooling tubes radiators etc., joint inspection for estimate, replacement of defective parts, assembly, stage inspection, re-tanking, oil filtration/ dehydration, fill dehydrated oil and fresh oil and testing the repaired transformers for all the routine tests as per IS 2026 (Part 1): 2011 with latest amendments. 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. (b) Rewinding of both HT & LT coil shall be measured and paid for separately under respective item of this schedule. (c) Transportation charges for transportation of transformer from site to workshop and after repair, workshop to site shall be borne by the contractor and cost thereof shall be deemed to be included in the unit rate quoted for this item. (d) The spare parts excluding nuts, bolts, washer shall be measured and paid for separately (e) The said transformer shall be repaired in reputed workshop as decided by the GE. (f) Testing of transformer after repair shall be carried out as per IS 2026 (Part 1): 2011 and the cost of testing shall be deemed to be included in unit rate quoted against this item. (g) The IR value of the dried winding before inserting the core in the shell shall be measured and recorded.

M & L for rewinding of coils on primary side of transformer of any capacity using proper size, enamelled round aluminium winding wire of Class 180 conforming to IS 13730(Part 15): 1994 as per existing size, turns and insulation class including connecting minor insulation materials suitable for 11 kV/ 415 V transformer complete all as specified and as directed.

M & L for rewinding of coils on secondary side of transformer of any capacity using proper size, enamelled round aluminium winding wire of Class 180 conforming to IS 13730(Part 15): 1994 as per existing size, turns and insulation class including connecting minor insulation materials suitable for 11 kV/ 415 V transformer complete all as specified and as directed.

M & L for rewinding of coils on primary side of transformer of any capacity using proper size, enamelled round copper winding wire of Class 180 conforming to IS 13730(Part 8): 1996 as per existing size, turns and insulation class including connecting minor insulation materials suitable for 11 kV/ 415 V transformer complete all as specified and as directed.

M & L for rewinding of coils on secondary side of transformer of any capacity using proper size, enamelled round copper winding wire of Class 180 conforming to IS 13730(Part 8): 1996 as per existing size, turns and insulation class including connecting minor insulation materials suitable for 11 kV/ 415 V transformer complete all as specified and as directed.

S & F LT brass stud suitable for transformer of capacity 50 kVA to 250 kVA including nut, bolt, washer & rubber conical bush etc. complete all as specified and as directed.

S & F LT brass stud suitable for transformer of capacity 300 kVA to 500 kVA including nut, bolt, washer & rubber conical bush etc. complete all as specified and as directed.

S & F HT brass stud suitable for transformer of capacity 50 kVA to 250 kVA including nut, bolt, washer & rubber conical bush etc. complete all as specified and as directed.

S & F HT brass stud suitable for transformer of capacity 300 kVA to 500 kVA including nut, bolt, washer & rubber conical bush etc. complete all as specified and as directed.

S & F in repairs LT bush insulator suitable for transformer of capacity 50 kVA to 250 kVA complete all as specified and as directed.

S & F in repairs LT bush insulator suitable for transformer of capacity 300 kVA to 500 kVA complete all as specified and as directed.

M & L for reconditioning of unserviceable battery 12 V, 180 AH by replacing complete cells, PVC separators, electrolyte, terminals and final sealing, recharging and testing complete as directed.

S & F XLPE cable end termination, cold shrinkable, indoor type, suitable for voltage 6.35 kV/ 11 kV (Earthed), 3 core 95 sqmm complete all as specified and as directed.

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

S & F cable jointing kit for 6.35 kV/ 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.

S & F cable jointing kit for 6.35 kV/ 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 120 sqmm complete all as specified and as directed.

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

S & F XLPE cable end termination, cold shrinkable, outdoor type, suitable for voltage 6.35 kV/ 11 kV (Earthed), 3 core 240 sqmm 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.

Dehydration and filtration of existing transformer oil of transformer at different location with filtration machine and heating system to get the minimum di-electric strength of oil 40 kV minimum without disturbing the power supply system and refilling/ topping up /replacement of unserviceable transformer oil complete all as specified and as directed.( Note: Transformer oil required extra for filling/topping up shall be measured and paid separately under the relevant items of this schedule).

Supply, filling and topping up new transformer oil of dielectric strength not be less than 60 kV and conforming to IS 335: 1993 complete all as specified and as directed.

Supplying & laying including taking down in trenches, in road cutting and along pole 80 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.

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, 95 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.

Supply, laying, jointing, testing and commissioning cross-linked polyethylene (XLPE) insulated cable for working voltages of 1100 V, PVC sheathed, armoured, 3 core with reduced neutral conductors (3½ core), nominal cross sectional area of main conductor 150 sqmm, stranded aluminium conductor, ISI marked as per IS 7098(Part-I): 1988 including cable glands, lugs etc. to suit the cable size and to be laid in trenches, fixed along pole, under floors, through GI pipe laid under floors/roads, through concealed GI pipe along wall etc. complete all as specified and as directed.

M & L for earthing complete with galvanised steel plate earth electrode 600 mm X 600 mm X 6 mm 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, connected to earthing lead of 4.0 mm dia galvanised mild steel wire by means of bolts, nuts, check nuts and washers of galvanised iron from earth plate to test point upto 7.5 metre including all as shown in electrical plate No. 3 of SSR Part I (2009) including necessary concrete chamber in cement concrete M15 (Nominal Mix) using 20 mm nominal size coarse aggregate, precast RCC cover slab in cement concrete M15 (Nominal mix) using 20 mm nominal size coarse aggregate of size 40 cm X 40 cm X 5 cm reinforced with 8 mm dia TMT bars @ 150 mm c/c both ways with one handle for lifting made out of 8 mm dia bar, GI funnel, GI wire mesh filter, 20 mm dia GI pipe medium grade for watering, 20 mm dia GI pipe medium grade for protection of earthing lead, charcoal or coke and salt in alternate layers including necessary excavation and earth work in any type of soil/ strata and testing complete all as specified and as directed by the Engineer-in-charge.

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