Inquiry For Liaison Service
Sector abcSecurity ServicesTender ValueN.A.
LocationHaryana - India Ref.No42093723
Closing Date20 - Jan - 2021
Provision of transformer and connected items - supply, installing, testing and commissioning outdoor type, floor mounted step down transformer, 11 kv/433 volts (at no load) ac, 3 phase, 50 hz, 250 kva capacity, core type, double copper wound, oil immersed, naturally cooled, oil natural- air natural , with external cooling tubes, delta connected on primary side (hv) and star connected on secondary side (lv) in accordance with vector group dyn-11 with neutral brought out on secondary side (lv side) and having tapings at ± 2.5% & ± 5.0% on hv side to be changed by means of hand operated off load tap changer gear. the maximum temperature rise should not exceed 45 degree celsius in oil and 55 degree celsius in hv/lv winding when measured by resistance method after continuous full load run on an ambient temp of 40°c. the transformer shall be conforming to is-1180 updated energy efficiency, level-2 complete all as specified and directed and shall comprise of the following -, "(i) three nos porcelain bushing suitable for 11 kv on hv side complete with copper rods, nuts and washers. , ", (ii) one cable box on lt side (secondary side) consisting of four nos porcelain bushing with copper rods complete with nuts and washers, with cable glands suitable for reception / taking out of 300 sqmm 3.5 core lt 1100 volts grade pvc / xlpe insulated & sheathed, heavy duty, armoured cables including joint and jointing materials complete. , (iii) oil conservator with filter type drain valve and oil level gauge., (iv) de-hydrating breather with first fill of dehydrating agent (silica gel)., (v) explosive vent, thermometer pocket on tank cover, oil level gauge, oil drain filter valve, lifting lugs for complete transformer and as well as core and winding assembly, oil filling hole with cap / plug with connection plate complete, air release valve plug and four nos plain solid cast steel detachable rollers., "(vi) one no 100 mm dia, dial type thermometer, vapor pressure type, having range 0-120 degree celsius with metal guard having maximum perimeter temperature reading indicator with re-setting device., ", "(vii) two earthing terminals on tank cover to facilitate fixing of 25x4mm galvanized iron earth strip for earthing of body, ", (viii) rating plate and terminal marking plate., "(ix) extra bushing for neutral in the lt cable box for providing independent set of earthing for neutral., ", "(x) first filling of new and unused transformer oil, is-335 marked (make savita / power link) filtered and tested upto 40 kv dielectric strength at 2.5 mm air gap between testing electrodes. , ", "(xi) arcing horns for ht side (01 no per phase), ", "m&l for switch air brake gang operated triple pole mechanically operated mounted on ht insulators (09 insulator) horizontal type and ms galvanized steel frame with operating mechanism worked from ground level including operating rod of size 32 mm dia gi medium grade for current rating upto 200 amps 11000 volts complete with locking arrangement , ms clamps ,bolts ,nuts and washers etc. including two coat of aluminium paint over a coat of red oxide primer on ms work complete all as specified and directed., note (the quoted rate should be inclusive of jumpers, aluminium thimbles, connections etc. the handle should be covered with pvc sleeves)", supply and installation drop out fuse assembly single pole 11 kv, 25 amps rating complete expulsion fuse element on four pole structure complete all as specified and directed., s&f lightening arrestor suitable for 11000 voltage expulsion type complete with all fittings, transmission class, discharge capacity 65 ka complete all as specified and directed., "m&l for earthing complete with galvanised steel earth plate electrode 600 x 600 x 6mm thick, burried, directly and vertically in the ground to depth not less than 2.25 mtr below the ground level with top edge of earth plate not less than 1.5 meters below normal ground level connected to galvanised iron earthing strip 25 x 4mm as earth lead by means of bolts, nuts, check nuts and washers of galvanised iron or steel, gi pipe light grade 40mm bore for protection of earth lead and gi watering pipe 20mm bore light grade with funnel and wire mesh, pcc chamber in cement concrete 136 type c-1, 80mm thick pre cast rcc 124 type b-1 cover reinforced with 8mm
bars @ 100mm c/c both ways earth plate surrounded by alternate layres of packed charcoal salt packed which shall be not less than 15 cm in all sides of earth plate all as shown in electrical plate no-3 mes sch part-i complete all as specified and directed., note - the unit rate includes for protection pipe and gi strip 25 x 4mm from top of earth plate up to 7.5 meter above ground level.", "m&l for earthing complete with galvanised steel earth plate electrode 600 x 600 x 6mm thick, burried, directly and vertically in the ground to depth not less than 2.25 mtr below the ground level with top edge of earth plate not less than 1.5 meters below n
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