PROVISION OF ISOLATION TRANSFORMER OF 250 KVA AT IACCS OPS ROOM AT AF STN MEMAURA

Amount

Excavation in trenches n. exc 1.5 m wide and n.exc 1.5 m in depth and getting out soft /loose soil complete all as specified and as directed for laying of under ground cable/pipe etc. complete all as specified and as directed

Returning, filling in, including spreading, leveling, watering and well ramming in layers n. exc 25 cm thick in soft/loose soil, complete, all as specified and directed.

Removing surplus excavated material to a distance not exc 50 meter and depositing where directed at level not exc 1.5m above the starting point, complete, all as specified and directed.

Material and labour for providing sand cushioning with dry fine sand including filling, spreading, levelling in layers in cable trench with approved quality of sand for protection of under ground cable complete all as specified and directed.

Supplying & laying burnt clay bricks, sub class 'B', designation 75, old size laid in trenches over cable protection complete all as specified and directed.

Supply, laying and testing of LT cable 1100 volt grade XLPE insulated underground electric cable PVC bedded and sheathed steel wire/strip armoured aluminum stranded conductor of size 240 Sq mm 3.5 core complete all as specified and directed.

Supply, installation, testing and commissioning of Isolation transformer, 250 KVA capacity, Three phase, 50 Hz, OUTDOOR , Copper wound , oil cooled , class of insulation A ,metallic body duly powder coated designed for input Voltage range 415+-5% and output voltage range 415+-5% ,Ratio 1:1 , Vector Group :Dyn 11, Delta- star with first filling of transformer oil of requisite dielectric strength up to level , efficiency more than 95 % , separate neutral bushing shall be brought out for earthing Potential difference between neutral to earth less than one volt with all standard fittings like digital temperature meter , adequate number of cooling radiators , lifting hooks one set , Earthing terminal two nos complete including necessary PCC foundation 1:3:6 type C-2 (using 40 mm graded aggregate) for placing of Isolation transformer as per manufacturer's instruction and testing as per BIS 9815 and 2026 complete all as specified and directed. Make: ITE Gurgaon / Chime Electronics Delhi (Brand -Sinetrac) / Vintek Electronic New Delhi ( Brand- Volina)/ Instruments& Equipment Co (Brand- IECO) / Vinitec Electronic Laboratroy New Delhi

M & L for Earthing complete with galvanized steel earth plate electrode 60 cm X 60 cm X 6.0 mm thick buried directly in ground (earth pit not less than 2.25 mtr deep below normal ground level) with top edge of plate not less than 1.5 mtr below ground level connecting to the GI strip 25 x 4mm, by means nut bolt, nuts, check nuts and washer of the GI Earth wire protected by provision of GI light grade pipe 40 mm incl provision of concrete pit in PCC (1:2:4) type B-1 using 20 mm graded stone aggregated with 40 mm thick cover with RCC (1:2:4) reinforced with XPM (weight not less than 4 Kg / Sqm) and frame of angle iron 25mm X 25 mm X 3mm with lugs 2 Nos and with 6 mm dia MS bar handle made to shape, GI light grade 20 mm bore pipe for watering perforated at bottom 1.75 mtr long placed on top edge of earth plate, common salt and charcoal filling, taste point made out of phosphorus bronze with fixing arrangement, funnel, wire mesh and earth work in hard/dense soil, returning filling in and removal of surplus soil to a distance not exceeding than 50 mtr, all as per electric plate No 3 of SSR Part I 2009 and connection to earth test point all as specified incl testing on completion”.

M/S PRATAP ENTERPRISES

m/s allied enterprises

Vishal Traders

Yaduvanshi Traders

M/S WALIA TRADESRS

HINDUSTAN TRADING COMPANY

VIDYA TRADERS