PROVN OF TRANSFORMER 500 KVA TROLLEY MOUNTED WITH CONNECTED ITEMS AT BD BARI MIL STN UNDER GE KALUCHAK

Amount

Supply,install,testing and commissioning outdoor type step down transformer 11000 volts/433 volts (at no load) ,AC , 3 phase 50Hz capacity 500 KVA core type double copper wound , oil immersed , naturally colled, oil natural, air natural, (ONAN) with external cooling fins , delta connected on primary side (HV) ) star connected on secondary side (LV) in accordance with vector symbol , Dyn 11 (vector group) with neutral brought out on secondary side (LV side) and having tapping at +5 to (-)10 % HV side to be changed by means of hand operated off load tap changer gear. The Transformer shall be IS 1180Part 1:2014 (level -3) and BEE certified and shall comprise of the following :-

a) cable end box on HT side suitable for 95 sqmm 3 core XLPE cable b)cable end box on LV side suitable for 400sqmm 3.5 core XLPE cable c)Oil conservator with filter type drain valve and oil level gauge d)dehyderating breather with first fill dehyderating agent (silica gel) e) explosive vent f)Thermometer pocket on tank cover g)One No 100mm dia , dial type thermometer , vapour pressure type , having range 0-120 degree celcius with metal guard having maximim perimeter reading , temperature indicator with resisting device for transformer. h) Two earthing terminals on tank cover to facilate fixing of 32x6mm copper earth strip for earthing of neutral body. i)Rating plate and terminal making plate j)oil level gauge k)oil drain/filter valve l) lifting lugs m) Oil filling hole with cap / plug with connecting plate complete n) air release valve plug o)Four plain solid cast steel deattachable rollers p)extra bushing for neutral , outside the LT cable box for providing independent earthing for Neutral q)First filling of new and unused transformer oil IS:35/93(4th revision), marked

Rubber insulation mat of size 1 metre x 2 metre x 19mm thick to be fitted in trolly black colour placed in postion complete all as specified and as directed.

Supply and fabrication of rigidly welded construction, 4 ton Trailer ribbed bed mild steel Trailer 4 wheeled suitable for mounting transformer step down outdoor type complete with stranded fittings.suitable for mounting transformer step down outdoor type complete with standard fittings.The Trailer should with stand outside exposure & will not be adversely affected by mechanical hazards like bump shock, vibration etc. The overall dimensions of the 4 wheeled Trailer is as under :-Length - 4790 mmWidth - 2100 mm Height - 910mm + 25 mm from GroundTranformer and allied eqpts . The Trailer is designed to be towed by any load carrying vehicle.CHASSIS FRAME :- The chassis should be designed to accomadate 500 KVA step Down 11/433 KV Transformer & allied equipments. The frame shall consist. of heavy rolled steel channels & pressed channels are sparingly used for cross members. The floor/Platform shall be of 6 mm thick steel sheets.The Trailer should have two axles of 63/50 square barand fitted with for wheels having pneumatic tyres. A rigid steel plate form along with four mudguard and supported on leaf spring suspension having 4 tonne capacity. A eyes hook is provided for coupling the trailer to the prime move vehicles stand 'T' reflector

Axles and Suspension Front and rear axles are made of solid 63 mm square EN8 material and 50 mm sq. EN8 material respectively. Each of the four wheels are supported on two Tapper roller bearings on the axles. A removable type hub cap is screwed on the hub. This permits inspection and access to the outer wheel bearings.The specification of the axle and bearings are given below :Type - Rear Full Straight Axle (Rigid) Front Stub Axle Type (Acker man Type)Type 1700 mm at ground Level + 5 mmBearing Type Tapper RollerBearing Brand SKF (Pt. No 30209), NBC, KOYO or Equ iA hand brake lever is mounted under the frame, on the LH side of the Trailer connected by a rod and YOKE to an equalizer and by cables to the wheels. Through these connections, it actuates the brake shoes in the rear wheels. An eccentric provided on the emergency brake operating lever permits adjustment to compensate for wear.

Draw Bar and steering arrangement The draw bare is "V" shapped frame with forged steel toying eye. Steering head is bolted to the chassis front cross member by high tensile bolts. Steering yoke is pivoted in the steering head by a steering bolt. Draw bar is connected to steering yoke. Steering rod is connecting steering lever and steering yoke through ball stud joints. Steering lever rod levers and ball stud joints. Steering arms LH and RH are pivoted on the axle blank through king pins.Spare Wheel Carrier The spare wheel with suitable storage arrangement is provided as per specification given below:Wheel Size 6.00 G - 16, 5 deg S DC Tyre 9.00 x 16/5 deg., 16 PRCC pattern (Cross Country pattern) 40 PSI for normal roads (c) System for free movement of tyres at 180 degrees in the toeing direction will be avoided with provision of mild steel plate, brushing, bearing system with additional channel frame and Complete with all other items required to make the trolley functional complete all as specified and as directed.

XLPE insulated screened PVC bedded ,unarmoured,electric power cable (heavy duty ) 11 KV (earthed) grade with stranded aluminium conductor of size 95 sqmm ,single core complete all as specified and as directed.

Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for single core core XLPE armoured aluminium conductor cable of size 50 sqmm to 95 sqmm complete all as specified and as directed.

XLPE insulated screened PVC bedded electric power cable unarmoured (heavy duty ) 1.1 KV grade with stranded aluminium conductor of size 400 sqmm ,single core complete all as specified and as directed.

XLPE insulated screened PVC bedded electric power cable unarmoured (heavy duty ) 1.1 KV grade with stranded aluminium conductor of size 35 sqmm ,single core complete all as specified and as directed.

Supply, installation, testing and commissioning of CPRI approved, factory made, LT panel board cubical, Outdoor type, floor mounted double door, 3 phase 4 wire, 50 cycles, 415 Volts. The panel board shall be made of 3.15mm thick CRCA sheet for load bearing members and 16 SWG (1.6 mm thick) for doors covers and internal partitions and shall be powder coated both side. Base frame of the panel shall be made of ICMC channel of size 50 x50 x 6mm, The panel shall be provided with separate compartments for each switch gears with hinged door including interlocking with switch gears. The panel board shall be suitable for AC, 415 Volts, 50 Hz, 3 phase, 4 wire supply complete with epoxy insulated 1000 Amps rated high conductivity Aluminium bus bars, supported with DMC / SMC barriers and coluor coded, prewired with copper cable, the degree of protection is IP-54. the panel shall be complete with instrumentation such as LED phase indicating lamps and CT's, including extended aluminium strip of rating of Incomer (800Amps), and outgoing as per rating of MCCB’s, including aluminium lugs to connect the cable etc. complete all as specified and as directed.

((a) MCCB 400 Amps, 4 pole, 415V, 50Hz, AC Supply with breaking capacity 36 KA (Adjustable thermal & magnetic release) - 01 Nos (b) Multifunctional meter ---01 No (c) Indicator lamp RYB :01 Set (d) CT'S 500/5 01 Set (e) Set of aluminium bus bar of suitable size up to 400Amps cap.

MOHAN LAL AND SONS (BID ID -3169097)

HUMERS INFRATECH (BID ID -3164630)

M/S SHREE KRISHANA ENERPRISES (BID ID -3163360)