PROVISION OF AUTOMATIC SERVO VOLTAGE STABILIZER AND ELECTRIC CONNECTION FROM DG SET TO BLDG NO P-12, P-13 AND P-14 UNDER AGE E/M AT MIL STN YOL

Earth work in excavation by mechanical means Hydraulic excavator)/ in foundation trenches or drains (not exceeding 1.5m in width or 10sqm on plan), including dressing of sides and ramming of bottoms, lift upto 1.5m, including getting out in all kind of soil excavated soil and disposal of surplus excavated soil, within a lead of 50m complete all as specified and directed.

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

PCC 1:3:6 type D-2, using 40mm graded crushed stone aggregate as in support of angle etc; complete all as specified and directed.

Supply, laying, jointing and testing, laid in trenches/road crossing/under floor/on walls/on poles including clamps or passing through pipes, 1100 volts grade, LT XLPE insulated, armoured heavy duty electric cable with stranded aluminium conductor of cross sectional area 240sqmm, 3.5 core complete all as specified and directed.

Supply, laying, jointing and testing, laid in trenches/road crossing/under floor/on walls/on poles including clamps or passing through pipes, 1100 volts grade, LT XLPE insulated, armoured heavy duty electric cable with stranded aluminium conductor of cross sectional area 16sqmm, 4core complete all as specified and directed.

Supply and fixing in replacement Automatic change over switch 415V in sheet metal enclosures 4 pole of capacity 100 Amps with side /front load handle operated complete all as specified and directed.

GI pipe light grade 40 mm dia for cable protection including cold drilling and making good surface as per existing complete all as specified and directed.

GI pipe light grade 80 mm dia for cable protection including cold drilling and making good surface as per existing complete all as specified and directed.

Double walled corrugated (DWC) pipe of size 40mm/ 32 mm (OD/ID) including snap fit coupler conforming to IS14930 (Pt-II) IS16205 (Pt-II) for protection of cable in underground complete all as specified and directed.

Supply, Installation, commissioning and testing of Servo controlled automatic voltage stabilizer (conforming to BIS:9815: Part-I: 1994 reaffirmed 2009) for automatic operation of capacity 250 KVA , indoor type 3 phase ,4 wire 50 Hz naturally oil cooled, unbalanced type copper wound digital display type relay free smooth and silent operation with 1st filling of transformer oil with test report of oil (IS335/1993 reaffirmed 2005) having following specifications: (i) Input voltage 300V-480V, (ii) output voltage stabilizer at 415 Volt +1%(adjustable) (iii) No distortion in wave form,(iv) Response time not to exceed 10 mile seconds,(v) Sensivity + 1% (vi) Rate of correction 8 Volt/sec for single phase and 20 Volts /sec for phase to phase (vii) No load losses less than 0.5%,(viii) Full load losses less than 2.5 %,(ix) Duty cycle- continuous 24x7 (x) Efficiency more than 95% (xi) Type of load : 3 phase unbalanced type,( xii) Digital display voltmeter/ammeter.(xiii) Capacity 250 KVA Note: -The stabilizer shall be powder coated for water/ dust and vermin proof complete all as specified and as directed.