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| 1 | Supply, install, testing & commissioning of trolley mounted Transformer step down 11KV/433V outdoor type copper wound 315 KVA Capacity (Energy efficient level 3) confirming to IS:1180 level 2 or as per latest IS for specification with necessary, standard fittings of 3 Phase, 4 wire, 50 cycles vector group Dyn-11 having primary (HT) voltage of 11 KV and secondary (LT) voltage of 433 V off load tap changing gear to provide volts with tapping on primary side having steps of + 2.5% from (+) 5% to (-) 7.5% in equal steps of 2.5% each so as to vary voltage on secondary side including first fill of transformer oil, the transformer shall be delta connected on 11KV side & star connected on secondary side with neutral brought out including provn of HT busing on HV (delta connection) side & LT cable box on LV (star connection) side incl plinth mounting arrangement, complete all as specified and directed (The transformer will have its initial oil filling to appropriate level (cost of oil including testing with desired dielectric strength included in rates) complete all as specified and directed by Engineer-in-charge. |
| 2 | Item no 1.00 Contd/…….No load voltage ratio: 11000 / 433 voltsNo of phase - 03Type of cooling - ONANVector Group - Dyn11Cable end box - HV & LV side (both with brass cable glands)Percentage Impedance - 4.5%Oil temperature indicator and winding temperature indicatorInspection HoleFirst filling of transformer oil of specification as per IS - 3335Basic insulation level: 75 kVNo of Tap position on HV side (Off load & manual operated) - 07 nosHT bushing with brass nuts and brass washers etc. - 03 nosLT bushing with brass nuts and brass washers etc. - 04 nosRating and diagram plate - 01 nos.Earthing terminal with lugs for body - 02 nos.Lifting lugs - 06 nos. (4 nos for tank and 2 nos for top plate of the transformer)Oil conservator with drain valve and oil level gauge - 01 nos.Oil filling hole with cap - 01 nosDrain valve (It shall be covered with metallic box spot welded to tank) - 01 nos.Thermometer pocket - 01 nos.Explosion vent - 01 nos.Silica gel breather - 01 nosPlatform mounting channel (with hole suitable for axle of rollers) - 02 nosRollers (Dia 150 mm & width - 50 mm) - 04 nos.Filter Valve - 01 nosTrolley must be Heavy-duty trailer or skid-mounted trolley. Chassis Material MS (Mild Steel) or structural steel, hot-dip galvanized. Frame to be Welded steel channel or I-beam frame.Load Capacity As per transformer rating. Solid rubber tyres (heavy-duty, off-road rated). Suspension Leaf spring or hydraulic suspension for shock absorption. Landing Gear Manual or hydraulic jacks for levelling and stabilization. Lifting hooks or eyes for crane handling. |
| 3 | item 1.00 contd/-.... Notes:(i)The transformer shall be ISI marked with energy efficiency level-3 category and having BEE certification for which necessary test certificate to be produced by contractor from manufacturer of the transformer.(ii)Factory inspection (at factory) and Pre commissioning test of transformer (at site) shall be carried out by Rep of Accepting Officer. (iii)Before procurement of transformer, contractor shall furnish certificate that manufacturer has obtained licence from Bureau of Indian Standards.(iv)Cost of all arrangements, machinery and labour for fixing and installation of transformer on specified site is included in quoted rates.(v)Contractor has to produce OEM test certificate. |
| 4 | Supply, install, testing & commissioning of Float cum Boost SCR controlled panel (FCBC) with 24 volt 60 Amp single phase 3 feeder battery charger and DC distribution board in a common cubicle. The charger is suitable for 230V +/- 10% AC inpput and output is suitable to charge 24V DC 300 AH batteries and also supply load. The Output voltage remains constant within +/- 2% for AC input voltage variation 230V +/- 10% and load variation 0-100% complete all as specified and directed. |
| 5 | Supply and fix sealed maintenance free VRLA battery bank 24 Volt, 300AH consisting of 12 No. cells of 02 volt each complete with Inter-cell copper conductor, SS nut bolt , MS powder coated in factory complete all as specified and directed. |
| 6 | Supply and fix Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 95 sqmm complete all as specified and directed. |
| 7 | Supply and laying, connecting and testing XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavyduty) with aluminium conductor, 11000 volts Earthed, grade cross sectional area 95 sqmm 3 core laid in trenches/ on poles/ road crossing or passing through pipe under road crossing, clamping on walletc. complete all as specified and directed. |
| 8 | Supply, laying and testing cable XLPE Insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 240 sq mm 3½ core laid in trenches/ on poles/ road crossing or passing through pipe under road crossing, clamping on walletc. complete all as specified and directed. |
| 9 | Supply and laying, connecting and testing 4C X 16 sqmm amoured copper cable for power and control supply to FCBC panel laid in trenches/ climbing on wall complete all as specified and directed. |
| 10 | Supply and laying, connecting and testing 2C X 2.5 sqmm amoured copper cable for power and control supply to FCBC panel laid in trenches/ climbing on wall complete all as specified and directed. |
| 11 | Earthing complete with galvanised steel earth plate electrode 60 x 60 cm x 6 mm thick, buried directly in ground (earth pit not less than 2.25 meter deep below ground level) with top edge of the platenot less than 1.5 meters below normal ground level, connected to and including 32 x 6mm galvanised iron earth strip, by means of bolts, nuts, check nuts & washers of galvanised iron all as shown in electrical plate No. 5 of MES SSR part I, and testing on completion including excavation and earth work in any type of soil, PCC (1:3:6) type C1 chamber, precast RCC slab 50mm thick in cement concrete (1:2:4) type B1, reinforced with welded steel wire fabric or XPM, (weight not less than 4 kg per sqm) with cast iron frame, funnel with wire mesh, GI watering pipe 20mm dia medium grade, and lugs complete all as specified and directed. (For FCBC panel only) |
| 12 | S&F G.I strip 32x6mm with saddles & fixing screw etc for extension of existing earthing grid upto trolley mounted transformer complete all as specified and directed. |
