CA NO. CWE /HILLS /PGH/109 OF 2026-2027 PROVN OF TRANSFORMER TROLLEY MOUNTED AT MIL STN PITHORAGARH UNDER GE (MES) PITHORAGARH

Supply ,installing ,testing and commissioning of energy efficient AC 3 phase 50 cycle per second 400 KVA capacity transformer copper wound ,step down, indoor type 11000/433 volts ( at on no load) confirming to IS 1180 (Part-I) level 3 ( as per latest energy level configuration level 3 now level 2 ), and BEE certified double wound oil immersed naturally cooled with internal cooling tubes delta connected on primary ( HV) side and star connected on secondary ( LV) side in accordance with vector symbol Dy-11 ( Vector group IV) with neutral brought on secondary ( LV ) side and having taping +/- 7.5% in step of 2.5% HV side to be varied by a manually operated “OFF LOAD” tap changing gear. The maximum temperature rise should not exceed 45 °C in oil and 55 °C in HV & LV winding when measured by the resistance method after continuous full load run and in ambient temp of 40 °C . including first filling of oil, all fitting and accessories and mounting all as specified. Inside of tank shall be painted with varnish or liquid resistant paint. For external surfaces one coat of thermo setting powder paint or one coat of epoxy primer followed by two coats of polyurethane base paint shall be used. IS: 1180 (Part 3) shall be referred to for paint thickness for normal to medium corrosive atmosphere. For highly polluted atmosphere and special application external paint work shall be as per direction of Engineer-in-Charge. Design ambient condition : a) air temperature 50 0C, b) Relative Humidity 90 % Max, c) Seismic Zone as per location of site, d) Altitude of Pithoragarh site. Noise level Shall not exceed limits as per NEMA TR-1 with all accessories running measured as per IEC 551 / NEMA standard. The transformer shall be IS : 1180 (PART-I) : 2014 (Fourth Revision) with latest amendments BIS certified (ISI mark) level 3 energy level configuration complete with all standard accessories complete all as specified and as directed.The transformer should have QR code which should contain drawing, test report OEM manual, Geo- Tag of manufacturing location etc. Marking Each transformer shall be provided with rating plate made of anodized aluminium/ stainless steel material securely fixed on the outer body, easily accessible, as per IS: 1180 Part-3. The entries on the rating plate shall be indelibly marked. Fitting and Accessories The transformer shall be completed with standard fitting and mainly comprising the following :- Make : ABB/ Schneider/ ITE Gurgaon/ Voltamp or as approved by GE

(a) One cable box on HV side (primary side) consist of 3 Nos porcelain bushing with studs made out of copper with nuts and washers and one cable glands suitable for reception of taking out one No 3 core HT cable of 95 Sqmm to 120 Sqmm size 11 KV grade PVC sheathed and PVC insulated armoured heavy duty. (b) One cable box on LV side ( secondary side) consist of 4 Nos porcelain bushing with studs made out of copper with nuts and washers and one cable glands suitable for reception of taking out one No 3.5 core LT cable upto 400 Sqmm 1100 volts grade PVC sheathed and PVC insulated armoured heavy duty. (c) Conservator with drain valve and oil level indicator. (d) Dehydrating breather with first fill of dehydrating agent silica gel. (e) Explosive vent. (f) Thermometer pocket on tank cover (g) One No 100 mm dia dial type thermometer vapour pressure type having range –120 degree C with more reading pointer maximum indicator and re-setting device (h) Rating plate with terminal marking (j) Two earthing terminal on tank and tank cover to facilitate fixing of 32x6 mm GI strips (k) Oil level gauge (l) Oil drain and filter valve (m) Lifting lugs/hooks (n) Oil filter hole with cap/plug with connection complete (o) Air relief valve plugs (p) Four plain solid cast steel detachable by directional rollers (q) Extra bushing ;for neutral out side the cable for providing independent earthing for neutral. (r) First filling fresh oil conforming to relevant IS and tested upto 50 KV dielectric strength

Supplying and laying synthetic Rubber insulated mats 2.5 mm thick for voltage upto 11 KV for electrical purpose as per IS 15652-2006, (superseding IS 5424) suitable for electrical shock safety of sizes 2m x 1m complete all as specified and as directed.

Supply and fabrication of rigidly welded construction 4 wheeled , 4 Ton Trailer ribbed bed mild steel trolley suitable for mounting transformer Step down outdoor type complete with standard fittings.The trolley should withstand field use and will not be adversely affected by mechanical hazards like bump shocks vibration etc complete all as specified and as directed.The Overall dimension of the 4 wheeled trailer is as under :- Length 4790 mm Width 2100 mm Height 910 mm + 25 mm from Ground Transformer & allied eqpts. The Trailer is designed to be towed by any load carrying vehicle.The trolley shall be completed with standard fitting and mainly comprising the following :-

CHASSIS FRAME :- The chassis should be designed to accomadate 400 KVA step Down 11/433 KV Transformer & allied equipments. The frame shall const. 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 mm Bearing Type : Tapper Roller Bearing Brand : SKF (Pt. No 30209), NBC, KOYO or Equi A 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 Tyre Air Pressure - 30 PSI for cross country track

In addition, the trailer/trolley must have the fwg items:- (a) Side railing 65cm with welded melded mesh 25 x 50 mm of 4 mm galvanized iron wire with frame work of angle iron 40 x 40x 6mm. (b) Top Cover Sheet with Galvanised sheets on suitable height (b) Painting with two coats of synthetic enamel paint over a coat of red oxide zinc chrome prime. (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 all as specified & 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, duly grouted on platform made of brick work in CM (1:2:4), 15mm thick plastering in CM (1:6) having minimum height of 600mm. 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 copper 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 and comprising of the following:-