REPAIR AND MAINTENANCE OF HT CABLES, OVERHEAD LINES AND ALLIED WORKS UNDER EXTERNAL ELECTRIFICATION AT SI LINES UNDER GE BHOPAL

Amount

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 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 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 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

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

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, minium 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, minium 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 11 kV, highest system voltage 12 kV, rated voltage of arrester 9 kV, continuous operating voltage 7.2 kV, temporary overvoltage (10.15 kV for 1 s, 9.50 kV for 10 s, 8.75 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) 75 kV, lightning impulse residual voltage (8/20 µs) at nominal discharge current maximum 25 kV, switching impulse residual voltage (30/60 µs) at switching impulse discharge current maximum 20 kV, high current impulse withstand capability (4/10 µs) 100 kA, minimum creepage distance 300 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.

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.

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.

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 :- Vehicle and othe T&P shall be arranged by the contractor at own cost.

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 to 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, 120 sqmm to 185 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 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.

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, 33 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.

ELITE WORKS

M/S RAKESH TRADERS