PROVN OF 500 KVA PORTABLE TRANSFORMER AT AF STN PHALODI

Amount

Supply, installing, testing and commissioning Out door type step down transformer, 11000/433 Volts (at no load) AC, 3 phase, 50 Cycle, 500 KVA,core type copper wound, oil immersed, naturally cooled, Oil natural air natural (ONAN), with external cooling tubes, delta connected on primary side (HV) and 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 (+/- ) 2.5% to (+/-) 7.5% in steps (+/-) 2.5% 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 degree Celsius. The transformer shall be IS : 1180 : 2014 marked and shall comprise of the following :- (a) HV side (Primary side) consisting of 3 Nos porcelain bushing suitable for 11 KV complete with bushing, copper rods, nut and washers. (b) LV side (Secondary side) consisting of 4 Nos porcelain bushing with copper rods suitable for 0.433 KV complete with bushing, copper rods, nut and washers. (c) Oil conservator with filter type drain valve and oil level gauge. (d) De-hydrating breather with first fill dehydrating agent (silica gel). (e) Explosive vent. (f) Thermometer pocket on tank cover. (g) One No 100 mm dia, dial type thermometer, vapor pressure type having range 0-120 degree Celsius with metal guard having maximum perimeter reading temperature indicator with resisting device for transformer. (h) Two earthing terminals to be provided diagonally on either side of tank cover to facilitate fixing of 32X6 mm galvanized iron earth strip for earthing of neutral and body. (j) Rating plate and terminal marking plate. (k) Oil level gauge. (l) Oil drain filler valve.

Item Ser No. 1.00 contd...) (m) Lifting lugs (n) Oil filling hole with cap/plug with connecting plate complete. (o) Air release valve plug. (p) Four plain solid cast steel detachable rollers. (q) First filling of new and unused transformer oil IS-335/93 (fourth revision) marked filtered and tested up to 60 KV dielectric strength at 2.5 mm air gap between testing electrodes. (r) One danger notice board having conventional danger sign of skull with bones in painted in red color. (s) Off circuit Tap changing switch Note: Transformer to mounted on the trolley with propper fastening by means of nuts and bolts to the base of the trolley costing included in the quoted rate, Certification of dielectric strength shall be submitted by the contractor after filling the oil.

Supply & fix LT panel board Outdoor to house Incoming MCCB 800 Amps 4 pole , cubical type of size not less than 600X1000X450mm, mounted on the trolley made out of 3.15 mm thick CRCA sheet CPRI Approved, weather proof and 40x40x6mm angle iron frame work duly Powder Coated of suitable size with copper bus bar rated 1500A with out going terminal incl following: - (a) MCCB 800 Amps 65KA 4 Pole MF- 01 Nos, (b) Multifunctional meter - 01 Nos (c) Three Phase Indicator RYB, LED type - 01 set

Supply of Fixed Tractor Trolley 5 TON (12' X 6.5' X 2') suitable to install 500 KVA out door transformer of size 2070 x 1570 x 2190 mm and LT Panel along side. Specification of the trolley : (a) Type of Axle Assembly (The capacity of Single Axle Trailers is not more that 5 Tones) (b) Overall length of Trailers shall not exceed 5 m up to 6: 4.8 meter (c) Type of Trailers Semi Trailer (Single Axle) (d) Type of Platform - Fixed Platform (e) Capacity of Trailer (Gross Load)(Tones) 6 Pay load of Trailer 5 ton (f) Material used for fabrication of trailer : as per Clause-5, Table-1 of IS:8213 (Latest) (g) Type of Axle Assembly : The capacity of Single Axle Trailers is not more that 5 tons (h) Overall length of Trailers : shall not exceed 5 m up to 6 ton load, 6.7m for above 6 ton load 4.8 meter Overall Width of Trailers between extreme points (meter) 2.1 meter Overall Height of Trailers with tyre inflated from the supporting surface to sideboard (meter) 1.62 meter Ground Clearance (mm) 495 millimeter Axle Assembly Wheel Track(mm) 1500. (j) Axle Assembly dimensions : as per Table-2 of IS:8213 (Latest) Reto Reflective Marking (tapes) as per AIS -090 Lighting and Lighting signaling device as per AIS-062 (k) Trailers shall be fitted with Rear Under Run Protective Device (RUPD) confirming to IS 14812 :2005 (l)Trailers shall have service and parking brake as per AIS- 043 (m)The Trailers shall be fitted with pneumatics tyres and rims of suitable size confirming to IS:3154 :1991 and IS 10694 :1988 Number of Wheels 2 Nos. Note :(a) Additional four manual adjustable screw jacks stand to be provided at each corner of the trolley for ease load from the tyre on standing. (b) Transformer to mounted on the trolley with propper fastening by means of nuts and bolts to the base of the trolley costing included in the quoted rate.

Supply and fixing of XLPE insulated, armoured heavy duty electric cable with aluminium conductor, 1100 volts grade, cross-sectional area 400 sq. mm 3.5 core, 2 run from Transformer to LT panel complete all as specified and directed.

Supply and fixing of PVC insulated unsheathed Single core 35 Sqmm industrial copper cable single run for connection from Transformer to Earthing complete all as specified and directed.

M/S HARIOM CONSTRUCTION COMPANY

M/s Yash Electrical and Maintenance

M/s Prem Associates