UPGRADATION OF TRANSFORMER AT RAIPUR SATWARI UNDER GE SATWARI.

Amount

Disconnecting of existing transformer outdoor type 11 KV /433 Volt supply system electrically both side, earth terminal and taking down carefully from pole / platform mounted on PCC foundation etc and depositing to MES store yard of capacity 50 KVA to 200 KVA complete all as specified and as directed.

Supply, installation, testing and commissioning outdoor type,step down transformer 11000/433 volts (at no load) AC, 3 phase 50 Hz capacity 315 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 range -5% to +5% HV side to be changed by means of hand operated off load tap change 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:- (a) 03 Nos porcelain bushing with arcing horn on HV side suitable for 11 KV complete with bushing,copper rods, nuts and washers. (b) One cable box on LT side ( Secondary side) consisting of four Nos porcelain bushing with copper rods, complete with nuts and washers, with two Nos cable gland suitable for reception/taking out of XLPE insulated heavy duty armoured cable including gland, joint and jointing materials complete.

(c ) Oil conservator with filter type drain valve and oil level gauge. (d) De- hydrating breather with first fill dehydrating agent (silica gel). (e) Explosive vent. (f) Thermometer pocket on tank cover. (g) One Nos 100 mm dia, dial type thermometer , vapor pressure type, having range 0 - 120 degree celsius with metal guard having maximum perimeter reading temperature indicator with resisting device for transformer. (h) Two earthing terminals on tank cover to facilitate fixing of 32 X 6 mm galvanised iron earth strip for earthing of neutral & body. (i) Rating plate and terminal making plate. (j) Oil level gauge. (k) Oil drain/ filter valve. (l) Lifting lugs. (m) Oil filling hole with cap/plug with connecting plate complete. (n) Air release valve plug. (o) Four plain solid cast steel detachable rollers. (p) Extra bushing for neutral , outside the LT cable box for providing independent earthing for neutral. (q) First filling of new and unused transformer oil IS-35/93 (fourth revision) marked (Make - savita/Power Oil) filtered and tested up to 40 KV dielectric strength at 2.5 mm air gap between testing. Note:- (i) Certificate of dielectric strength shall be submitted by the contractor after filling the oil.

Supply, installation, testing and commissioning outdoor type,step down transformer 11000/433 volts (at no load) AC, 3 phase 50 Hz capacity 100 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 range -5% to +5% HV side to be changed by means of hand operated off load tap change 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:- (a) 03 Nos porcelain bushing with arcing horn on HV side suitable for 11 KV complete withbushing,copper rods, nuts and washers. (b) One cable box on LT side ( Secondary side) consisting of four Nos porcelain bushing with copper rods, complete with nuts and washers, with two Nos cable gland suitable for reception/taking out of XLPE insulated heavy duty armoured cable including gland, joint and jointing materials complete. (c ) Oil conservator with filter type drain valve and oil level gauge.

(d) De- hydrating breather with first fill dehydrating agent (silica gel). (e) Explosive vent. (f) Thermometer pocket on tank cover. (g) One Nos 100 mm dia, dial type thermometer , vapor pressure type, having range 0 - 120 degree celsius with metal guard having maximum perimeter reading temperature indicator with resisting device for transformer. (h) Two earthing terminals on tank cover to facilitate fixing of 32 X 6 mm galvanised iron earth strip for earthing of neutral & body. (i) Rating plate and terminal making plate. (j) Oil level gauge. (k) Oil drain/ filter valve. (l) Lifting lugs. (m) Oil filling hole with cap/plug with connecting plate complete. (n) Air release valve plug. (o) Four plain solid cast steel detachable rollers. (p) Extra bushing for neutral , outside the LT cable box for providing independent earthing for neutral. (q) First filling of new and unused transformer oil IS-35/93 (fourth revision) marked (Make - savita/Power Oil) filtered and tested up to 40 KV dielectric strength at 2.5 mm air gap between testing. Note:- (i) Certificate of dielectric strength shall be submitted by the contractor after filling the oil.

M&L for shifting of transformer outdoor type 11 KV /433 Volt supply system electrically both side, earth terminal and taking down carefully from pole and shifting from Raipur Satwari Officer Mess to STP Raipur Satwari of capacity 63 KVA complete and making connection at exiting two pole structure 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.

Earthing complete with galvanized steel earth plate electrode 60 cm x60cmX6 mm thick buried directly in ground to a depth not less than 3 mtr below normal ground level with top edge of earth plate at a depth not less than 2.25 mtr below ground level, earth plate surrounded by 15 cm thick packed layer of charcoal, magnicium sulphate, common salt and connected with in and including GI strip of size 32x6mm by means of stainless steel bolts, nuts, check nuts and washers connected to Transformers / panels. 40mm bore of GI pipe (light grade) from earth plate up to testing point for protection of GI strip and 20 mm bore GI pipe (medium grade) with wire mesh and funnel for watering including necessary excavation and earth work, (in any type of soil) PCC chamber (1:3:6) type C-2 with RCC cover with suitable size of handle made out of 8mm dia MS bars and angle iron 40 x 40x 3mm frame for cover complete all as shown in electrical plate No 3 of MES schedule Part I of SSR Part-I 2009 complete all as specified. RCC cover shall be painted with red paint over a primer coat and the rate include in the unit rate of item.

Switch air break gang operated triple pole mechanically operated from ground level, mounted on insulators and steel frame (12 insulator type) outdoor type suitable for vertical installation single break provided with locking arrangement consisting of MS channel, HT post top porcelene insulator with drop out fuses operating Rod 20m dia GI pipe medium grade confirming to IS:1818 of 1972 and current rating 200 Amp and voltage 11 KV including jumpering, lead of wire/cable as directed at site complete fixed in replacement, all as specified.

Excavation in trenches n.exc 1.5 m wide and n.exc 1.5 m in depth for laying of pipes etc not exc 10 Sqm on plan and not exc 1.5m in depth and getting out in soft loose soil all as specified and directed.

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

Removing excavated surplus materials to a distance n.exc 50 m and depositing where directed at a level n.exc 1.5 m above the starting point.

Supply and spreading sand Dry cushioning to cable providing with a layer of sand 8cm deep before laying the cable and 15cm deep after laying and stretching the cable in trenches complete all as specified and as directed by the Engineer-in-Charge.

Supply and laying sub class `B` bricks laid dry flat transversely along the length of cable with width equal to the length of bricks over sand cushioning as protection cover of cable laid, completed all as specified and as directed.

Supply, laying and testing cable XLPE PVC insulated, screened, PVC bedded galvanised steel strip or wire armoured electric power cable (heavy duty) 1100 volts grade with stranded aluminium conductor of size 300 Sqmm 3.5 core, completed all as specified and as directed.

Steel tubing galvanized (light grade) 80 mm bore conforming to IS-1239 for passing cable under road/floor or fixing to poles for protection of under ground cable complete with Flat iron 50x6mm clampsmade to shape and 12mm dia bolts, nuts and washers for fixing where required complete all as directed by Engr-in-Charge.

60 mm thick factory made chamfered edge cement concrete paver block of M-35 grade with approved colour, design & pattern as in footpath, parks, lawns, drive ways or light traffic parking etc of required strength, thickness & size/ shape, laid in required colour and pattern over and including 50 mm thick compacted bed of fine sand, compacting and proper embedding/ laying of interlocking paver blocks into the sand bedding, filling the joints with sand and cutting of paver blocks as per required size and pattern, finishing and sweeping eaxtra sand all as specified and directed by Engr-in-Charge.

Outdoor type cable end termination jointing kit heat shrinkable complete with all accessories and jointing materials suitable mounting on channel/angle iron with and incl cable pieces of suitable size length and line type for 3 core 95 sqmm 3 core XLPE HT cable complete all as specified and directed.

M/S ZTECH

Amit Enterprises

SATISH AND CO

BMMJ TRADERS AND ENGINEERS

M/S S K Electricals Regd