TENDER FOR PROVN OF 200 KVA TRANSFORMER AND ALLIED PANEL AND CABLE WORKS AT RATNUCHAK UNDER GE KALUCHAK

Amount

Supply, installation, testing and commissioning outdoor type,step down transformer 11000/433 volts (at no load) AC, 3 phase 50 Hz capacity 200 KVA, core type, double copper wound,oil immersed,naturally cooled,oil natural, Air natural (ONAN) with external cooling fins, delta connected on primary side (HV) star connected on secondary side (LV) in accordance with vector symbol, DYN 11 (vector group) with neutral brought out on secondary side (LV side) and having tapping at + 2.5% to +7.5% HV side to be changed by means of hand operated off load tap changer gear. The maximum temperature rise should not exceed 45 degree celcius in oil and 55 degree celcius in HV.LV winding when measured by resistance method after continuous full load run on an ambient temp of 40 degree celcius. The transformer shall be IS:1180 Part-1:2014 (Level-II) and BEE Certified and shall comprise of the followings:-

Cable end box on HT side suitable for 95Sqmm 3 core XLPE cable.

Cable end box on LV side suitable for 70Sqmm 3.5 core XLPE cable.

Oil conservator with filter type frain valve and oil level gauge.

De- hydrating breather with first fill dehydrating agent (silica gel).

Explosive vent.

Thermometer pocket on tank cover.

Rating plate and terminal making plate.

Oil level gauge.

Oil drain/ fillter valve.

Lifting lugs.

Oil filling hole with cap/plug with connecting plate complete.

Air release valve plug.

Four plain solid cast steel detachable rollers.

Extra bushing for neutral , outside the LT cable box for providing independent earthing for neutral.

One No 100mm dia, dial type thermometer, vapour pressure type having range 0-120 degree Celsius with metal guard having maximum perimeter reading, temperature indicator with resisting device for transformer.

Two earthing terminals on tank cover to facilitate of 20X3 mm copper earth strip for earthing of neutral body.

First filling of new and unused transformer oil IS-35/93 (fourth revision) marked filtered and tested up to 40 KV dielectric strength at 2.5 mm air gap between testing

Note:- Certificate of dielectric strength shall be submitted by the contractor after filling the oil.

Supply, laying and testing XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty earthed) with aluminium conductor, 11 KV, grade cross sectional area 95 Sqmm 3 Core laid in trenches/road crossing/on wall etc complete and all as specified & directed by Engr-in-Charge.

Supply & Errecting truelly vertical position steel tubular swaged poles complete with CI base plate, finial taper plug bolts, nuts & screws 11.0 mtr long type 410 SP-55 conforming to IS 2713 (Part 1 to 3, 1980 including two coat of synthetic enamelled aluminium paint over a coat of primer. Five strips of 300mm width alternate black and white paint of approved make should be provided on pole from the PCC bed complete all as specified and directed.

Supply, installation & testing of Air break, gang operated switch with 15 Nos insulators, outdoor type pole, mechanically operated, suitable for vertical operations, single break, provided with locking arrangement (including 50mm Godrej lock with two keys) mounted on and including steel frame and HT post type insulators copper alloy, high pressure, with operating mechanism having operating rod of 20 mm dia GI pipe (medium grade) operating from 1.2m above GL complete including drop out fuses conforming to IS-1318 of 1972, rated voltage 11 KV and for current rating 400 Amp complete all as specified & directed.

Lightning arrestors (set of three), expulsion type, HT metal oxide surge arrestor polymeric type, complete with all fittings, transmission class rated voltage 125 KV contionous operating voltage at 8/20 impulse, 75 KV discharge capacity 65 Kilo amp suitable for 11000 volts complete all as specified and directed

Cross arms bracing support clamps, back plate etc fabricated from structural steel section with bolts, nuts, washers,welding, bending cold or hot,drilling holes for bolts in any shape and size as directed or indicated and painted with one coat of red oxide primer and two coats of aluminium paints.complete all as sepecified dirceted by engr-in-charge.

Pin type insulator , porcelain, vitreous white / brown including one galvanized mild steel spindle, two galvanized iron washers and one nut (galvanized iron) , for size of 150 mm height, 150 mm dia for 11000 volts grade insulator all as specified and as directed.

Disc type insulator(Single disc assembly) , porcelain, vitreous white / brown of size of 145 mm height, 255 mm dia ball and socket type for 11000 volts grade insulator all as specified and as directed.

Construction of Plateform for installation of transformer with and including Earth work, Brick work, PCC, RCC, Plastering, chain link fencing, gate etc all as shown in Drawing No CWE/TD-230/2021 Sheet 1/1 dated 23 Jun 2021, complete all as specified and directed.

Galvanized iron tubing 80mm bore light grade with all fitting laid in trenches/wall/floor/pole for protection of cable including providing fixing clamps, bolts and nuts of suitable size all as specified and as directed by the Engineer in charge. Note : Excavation, earth work shall be measured and paid separately under respective items.

Cable jointing kit for 11 KV(Earthed) grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 95sqmm complete all as specified and as directed by the Engineer in charge.

Cable jointing kit for 11 KV(Earthed) grade cable for indoor termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Aluminium conductor cable of size 95sqmm complete all as specified and as directed by the Engineer in charge.

Supply, laying and testing underground LT Cable XLPE insulated, armoured heavy duty electric cable with aluminium conductor. 1100 volts grade, cross sectional area 150 sq mm 3.5 core size all as specified & directed by Engr in Charge.

Excavation in trenches not exc. 1.5 m wide and not exc. 1.5 m depth for foundation laying of cable etc or for shaft wells cesspits manholes per holes etc 10sqmm on plan and n.exe 1.5m in depth and getting out in any type of soil .complete all as sepecified & dirceted by EIC.

All as per item No 14 above but exceeding 1.5 mtr and not exceeding 3 mtr depth. complete all as sepecified & dirceted by EIC.

Sand cushioning for protection of underground cable consolidated and compacted with clean dry sand all as specified and as directed by the Engineer in charge.Note: Compacted thickness shall only be measured and paid.

Bricks,Sub class 'B' bricks, best quality locally available laid flat, dry in trenches for cable protection complete all as specified and as directed by the Engineer in charge

Returning, filling in, including spreading, leveling, watering and well ramming in layers not exc 25 cm in Soft/loose soil complete all as specified and as directed by the Engineer in charge

Removing excavated material to a distance n.exc 50 mtr and depositing where directed at level n.exc 1.5 mtr above the starting point all as specified and as directed by the Engineer in charge.

PCC ( 1:3:6 )Type C-2 (Using 40 mm graded stone aggregate as in foundation of pole, stay and filling and mass concrete) including providing necessary form work complete all as specified and as directed by the Engineer in charge

PCC 1:2:4 type B1, using 20 mm graded stone aggregate as in copping of electric pole at site including providing necessary form work complete all as specified and as directed by the Engineer in charge

Earth continuity conductor or main earthing lead 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 32x6mm galvanised strip complete all as specified and as directed by the Engineer in charge

Earth continuity conductor or main earthing lead 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 20x3mm COPPER STRIP complete all as specified and as directed by the Engineer in charge.

Earthing complete with COPPER plate electrode of size 600x600x3.15 mm thick buried directly in ground with earth pit not less than 2.25 meter deep below ground level with top edge of plate not less than 1.5 meter below normal ground level connected to COPPER STRIP of size 20x3mm up to 7.5 mtr by means of nuts, bolts, check nuts, washers of tinned brass, protected by galvanized iron pipe 80mm bore (Medium grade) all as directed including cement concrete (1:3:6) type C-1 earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 42 x 42 x10cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh, 20 mm bore galvanized iron pipe (medium grade) for watering,including charcoal or coke and salt in alternate layers and filling earth pit with fresh vegetable soil below copper plate and above upto ground level as required and necessary earth work in soft/loose soil complete all as shown in electrical plate No 3 of SSR Part I including testing on completion all complete as specified and directed.(Note:i)Charges for earth resistivity test deemed to be included in the quoted rate.ii)Earth resistance value shall be less than 3.0 ohm)

Earthing complete with galvanized steel earth plate electrode 600mm x 600mm x 6 mm thick buried directly in ground ( earth pit not less than 2.25 meter deep below ground level) with top edge of plate not less than 1.5 meter below normal ground level, connected to galvanized steel earth STRIP 32X6mm by means of bolts, nuts, check nuts and washers of galvanized iron or steel all as shown in electrical plate No 3 of SSR Part-I including necessary excavation and earth work PCC (1:3:6) type C-1 with 50 mm thick pre cast RCC ( 1:2:4) type B-1 cover slab (reinforced with 8 mm dia deformed bar @ 15 cm C/C both ways and suitable handle of 10 mm dia round bar) including providing charcoal or coke and common salt in alternate layers of 15 cm compacted thickness all around the earth electrode, with funnel and 20 mm bore galvanized iron watering pipe (medium grade) wire mesh, GI lugs, complete in all respect, GI earth wire protected by 15 mm bore (Light grade) galvanized iron pipe and other end connected with main switch board or earthing test point as directed including proper lugs, including disposal of soil to a distance not exceeding 50 mtr and necessary testing on completion complete all as specified and as directed by the Engineer in charge .Note: 1. Earthing Installation shall be done in the presence of Engineer in charge. 2. Earth resistance shall not exceed 3.0 ohm.

Amit Enterprises

Jiwan Singh