PROVISION OF TRANSFORMER AND VOLTAGE STABLIZER ALONGWITH ASSOCIATED WORKS AT AF STATION GORAKHPUR

Amount

Excavating in trenches not exceeding 1.5mtr wide and not exceeding 1.5mtr deep and getting out in soft / loose soil complete all as specified and directed.

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

Removing surplus soil to a distance not exceding 50 metre and depositing where directed at a level not exceeding 1.5 metre above the starting point complete all as specified and directed.

Sand cushioning for under ground cable with locally available sand for protection of cable 8cm before laying cable and 15cm deep over the cable including spreading and consolidations, complete. Note :- Punned thickness will be measured and paid.

Supply and laying un-reinforced precast concrete cable cover class HVP type 2 with peak size 450 mm x 180 mm x 40 mm complete all as specified and directed by Engineer-in-Charge.

Supply, installation, testing and commissioning of step down transformer of capacity 400 KVA, outdoor type complete with standard fitting and accessories, HT 11KV, 3 Phase, LT 433 volt, 3 phase 4 wire with off load tap changer on primary side to carry secondary voltage ± 7½ % with tappings at every 2½ % all as per IS 1180-2014 level 1, copper wound, oil cooling with fins vector group : DYN 11, including initial oil fitting complete all as specified including the following accessories :- (a) Three numbers porcelain bushing HT, 11KV with brass bushing rods, nuts, bolts and washers etc inside cable end box. (b) One cable box LT side consisting of 4 Nos porcelain with brass bushing rods complete with nuts and washers suitable for runs of 3.5 core LT under ground cable. (c) Oil conservator with filler type drain valve and oil level gauge. (d) Dheydrating breather with fast fill of dehydrating agent. (e) Explosion vents (f) Thermometer pocket on tank cover. (g) One number 100mm dia, dial type thermometer vapour pressure type having range 0 to 120 degree centigrade. (h) Rating plate and terminal marking plate. (j) Earthing arrangement. (k) Oil drain filter valve. (l) Oil drain valve. (m) Lifting hook. (n) Oil conservator with filling hole and cap. (o) Air relief valve plug. (p) Four plate solid cast steel detachable rollers. (q) Earth bushing for neutral outside the cable box for providing independent earthing for neutral. (r) Suitable size of channel on foundation for fixing the transformer with joint and stopper. (s) PCC plateform complete all as shown on drawing No CEAF/TD/EM/03 SHEET 1/1 Dated 31.10.1994 revision date 09.06.2003 excluding XPM welded mesh fencing and doors including 75 x 40 mm channel.

Supply, installation, testing and commissioning of step down transformer of capacity 160 KVA, outdoor type complete with standard fitting and accessories, HT 11KV, 3 Phase, LT 433 volt, 3 phase 4 wire with off load tap changer on primary side to carry secondary voltage ± 7½ % with tappings at every 2½ % all as per IS 1180-2014 level 1, copper wound, oil cooling with fins vector group : DYN 11, including initial oil filling complete all as specified including the following accessories :- (a) Three numbers porcelain bushing HT, 11KV with brass bushing rods, nuts, bolts and washers etc inside cable end box. (b) One cable box LT side consisting of 4 Nos porcelain with brass bushing rods complete with nuts and washers suitable for runs of 3.5 core LT under ground cable. (c) Oil conservator with filler type drain valve and oil level gauge. (d) Dheydrating breather with fast fill of dehydrating agent. (e) Explosion vents (f) Thermometer pocket on tank cover. (g) One number 100mm dia, dial type thermometer vapour pressure type having range 0 to 120 degree centigrade. (h) Rating plate and terminal marking plate. (j) Earthing arrangement. (k) Oil drain filter valve. (l) Oil drain valve. (m) Lifting hook. (n) Oil conservator with filling hole and cap. (o) Air relief valve plug. (p) Four plate solid cast steel detachable rollers. (q) Earth bushing for neutral outside the cable box for providing independent earthing for neutral. (r) Suitable size of channel on foundation for fixing the transformer with joint and stopper. (s) PCC plateform complete all as shown on drawing No CEAF/TD/EM/03 SHEET 1/1 Dated 31.10.1994 revision date 09.06.2003 excluding XPM welded mesh fencing and doors including 75 x 40 mm channel.

Dismantling of old unsv earthing and M & L for Earthing work complete with galvanized steel earth plate electrode 600x600x6mm buried directly in ground (earth pit not less than 2.25 metre deep below ground level) with top edged of the plate not less than 1.5 metre below ground level connected to galvanized iron earth stip of size 32 x 6 mm by means of bolt, nut check nut and washer of galvanized iron pipe of 40mm bore medium grade, for protection of strip, including funnel 20mm dia bore galvanized iron pipe medium grade for watering wire mesh, charcoal or coke and common salt in alternative layers all around the earth electrode compacted thickness 15cm including excavation and earth work, PCC 1:3:6 type C-2, CI pit cover, incl disposal of surplus soil to a distance n.exc. 50m , testing on completion, complete as shown in electrical plate No. 3 of MES, SSR Part-I. Notes:- (i)The concrete pit shall be made in PCC 1:3:6 type C-1, using 20 mm graded crushed stone aggregate 40mm thick precast cover slab of RCC (1:2:4), type B-1, using 20mm graded crushed stone aggregate with suitable MS handle in lieu of CI cover shown in electrical plate No 3 of MES SSR Part-I shall be provided. Reinforcement in RCC cover shall be of 8mm dia TMT bars laid @150mm c/c both ways. (ii) Item includes the cost of 7.5 metre GI pipe for protection of earth strip. Any variation in length shall be adjusted through deviation order. (iii) Item includes cost of 7.5 metre earth strips. Any variation in length shall be adjusted through deviation order. (iv) Earth plate electrode shall be surrounded by adequate quantity of charcoal dust and salt to a packed thickness of 15 cm on all sides.

Cable jointing kit for 11 KV (earthed) heat shrinkable,outdoor termination joint suitable for cross sectional area 95 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories complete.