PROVISION OF 150 KVA TRANSFORMER AT NACHLANA UNDER AGE (I) BHALRA

Supply, installation, testing and commissioning of step down transformer 11 KV/ 433 Volts (at no load) 3 Phase 50 Hz, 150 KVA, copper wound, outdoor type, with off load tap changing arrangement of HT side to vary secondary voltage upto ± 7.5 % in step of ± 2.5% including suitable cable entry boxes both on HT and LT to receive 95 Sqmm 3 core XLPE cable on HT side complete in all respect with standard accessories and fitment conforming to IS-1180 Part-I of 2014/IS 2026 and IS-1180 latest ammendments Dyn-11 connection complete all as specified and directed. The salient features of Transformer shall be as follows: (a) Transformer shall be oil immersed, naturally self cooled double wound copper, winding core type, MS radiater cooled tank complete with first fill of transformer oil plus 5% spare oil as per IS 335 of 1980 with test certificates with own cooling system. (b) Rating and diagram plates. (c) Earthing terminals = 02 Nos. (d) Lifting lugs. (e) Thermometer pocket. (f) Air release hole with plug (g) Winding/Oil temperature indicator (h) Conservation with oil level indicator (j) Castors with locking provision (k) Silica Gel breather complete (l) Wheel with baring Note: Transformer must be as per Energy efficiency Level-2 of IS: 1180:2014 with amendment No. 4. Transformer must be BIS Marked and BEE labelled and manufacturer should have NABL approved testing lab.

Steel tubular swaged pole type 410 SP-55 (11 mtr long) with 300mm x 300mm x 6mm mild steel plate continuously welded to pole, finial taper plug, bolts, nuts and screws complete all as specified and directed including painted with black bituminous paint internally and externally with anti corrosive paint in alternate black and white strips 30 cm each up to 1.5 mtr height from top edge of concrete and remaining pole with two coats of aluminium paint over a coat of red oxide primer including writing the number etc including taking down existing pole, complete all as specified and directed. Note: Excavation and Earth work, PCC in foundation and coping shall be measured and paid separately.

Lightening arrestor, expulsion type consisting of multiple spark gaps in series with one or more non linear resister to limit voltage surge on AC power circuit to interrupt power flow current suitable for outdoor installation and exposed direct to sun with ambient temperature below-10 °C to 50°C suitable for surge discharge capacity 65 KA, 11000 volts grade conforming to IS-4350 including all fittings, complete all as specified and directed.

Switch air break, gang operated, triple pole, mechanically operated suitable for horizontal or vertical mounting, fixed type, mounted on insulator and steel frame with operating mechanism worked from ground level, provided with locking arrangement for operating handle, consisting of MS channel, HT post type insulator, contacts of copper alloy, high pressure, heavy duty contact assembly, operating rod of 25mm dia GI pipe medium grade, drop out expulsion assembly of phases fuses etc conforming to IS:1018 of 1972 with continuous current rating with 15 insulators of current rating upto 400 amps 11000 volts grade, complete all as specified and directed.

Earthing galvanized steel earth plate electrode 600mm x 600mm x 6 mm thick buried directly in ground (earth pit not less than 2.25 mtr depth below normal ground level) with top edge of earth not less than 1.5 mtr below normal ground level connected to and including galvanized steel strip 32mm x 6mm as earth lead upto equipment by means of steel bolts, nuts, check nuts and washers, test point made of GI strip 40mm x 8mm, 10cm long, PCC 1:2:4, type B-1 in pit with precast RCC 1:2:4 type B-1 in cover reinforced with XPM not less than 4 Kg per Sqm with 40mm bore GI light grade protection pipe, 20mm bore GI medium grade watering pipe with funnel including charcoal, dust, salt, all as shown in electric plate No 3 of SSR Part-I (2009) specifications, complete with necessary earth work in any type of soil, removal to a distance not exceeding 50 mtr. On testing after completion if the desired earth resistance is not obtained the earthing will be redone at no extra cost.

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 of galvanised steel strip of 32mm x 6mm to connect earthpit to electrical equipment room, complete all as specified and directed.

Earthing complete with galvanized mild steel earth plate electrode 60cm x 60cm x 6mm thick buried directly in ground (earth pit not less than 2.25 meters below ground level) with top edge of earth plate not less than 1.5 meters below ground level connected to galvanized earth wire 4.00 mm dia by means of nuts, bolts, thimbles, chuck nuts, washers of GI or steel, PCC chamber of size 300mm x 300mm x 300mm (inside dimension) in 1:3:6 type C-1 using 20mm graded stone aggregate with fair finish, internal surface of concrete chamber shall be given 15mm thick plaster in CM 1:4, funnel with wire mesh of 22 gauge, 80 mm thick pit cover 320 mm x 320 mm of RCC 1:2:4 type B-1 using 20 mm graded stone aggregate reinforced with XPM, JALLI pit shall be filled with charcoal dust and common salt all as shown in electrical plate No 3 of MES SSR Part-I (2009) as specified including provision of 15mm dia medium grade GI pipe for earth wire protection and 20 mm dia light grade for watering complete, all excavation and earth work in any type of soil and connecting the earthing to an earthing test point / main switch board as specified and testing on completion complete all as specified and directed.

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 of galvanised wire of 4mm dia to connect earthpit to electrical equipment room, complete all as specified and directed.

ACSR conductor any size to HT over head lines, stretching properly to achieve proper sag including binding to insulators using GI/alumn binding wire all as required at site complete all as specified and directed.

Disc type insulator porcelain vitreous white, brown or green 145mm high and 255mm dia ball and socket type, single disc assembly for tension with tension clamp for conductor of working pressure 11000 volts, complete all as specified and directed.