Provision of Trolley Mounted Transformer of capacity 630 KVA at GE Brichgunj, Port Blair

Amount

Supplying, Installing, Connecting, Commissioning and Testing of Transformer, Step Down, Outdoor Type, Trolley Mounted complete with standard fittings and Trolley, 11 KV / 433 V [at No load], AC, 3 Phase, 50 Hz, of 630 KVA capacity, Double Copper Wound, Oil immersed, CRGO Core type Naturally cooled, Built-up with class "A" insulation, having Primary Voltage [HT] 11 KV and Secondary Voltage [LT] of 433 Volts, Delta connected on 11 KV Side & Star connected on 433 Volts side, designed & constructed with particular reference to Tropical Condition, conforming to IS – 1180-2014, Level-1 with latest amendment including fixing existing HT / LT Busbar and Cables etc. complete all as specified and as directed and comprising of the following Specification and Fittings: Continuous Rating : 630 KVA No-Load Voltage Ratio : 11 KV / 433 V Tapping on HV [%] : ± 7.5, ± 5, ± 2.5 Phase & Frequency : 3 Phase & 50 Hz Connection : Delta Star Vector Group : DYN 11 Cooling : ONAN Type : Outdoor

Notes for Serial Item No. 1: [A] The rate quoted is deemed to be inclusive of Trolley of size not less than 3500 X 1800 X 2300 mm as specified hereunder. Trolley shall be made up of ISMC100 as Main Chassis, ISMC75 as support channel, 6mm thick MS plate as floor, Welded wire mesh of size 50 X 50 with 6mm wire as in side walls and doors duly fixed to frame work made of ISMC75, doors fixed with suitable hinges and locking arrangement. Trolley shall be covered with Galvalume Sheet Roofing / Canopy with pre-painted Galvalume steel sheets of Trapezoidal profile having pitch 190mm, depth 29mm and thickness 0.50mm [Galvalume base-PPGL trapezoidal profile sheets], having tensile strength of 550 Mpa, fixed with aluminium self tapping screws, neoprene and EPDM washers of suitable size and using ISA50X50X5mm Frame work etc. Trolley shall be mounted on 2 Nos of 63mm Square Axles, provided with 4 Nos of Double plated Rims with Tyres of size 7 – 50/16 including butyl rubber tubes including One Spare Tyre with Rim of same size suitably mounted on to the Trolley. Axle shall be fitted with Leaf Spring suspension system. The trolley shall be capable of carrying 5 Tons minimum Forged Steel Toe Hook, Provision for tying HT & LT Cables, including GI Earth Strip of size 32 X 6mm, 2 Nos connected from Transformer Neutral and 2 Nos from Transformer Body and shall be terminated on the sides of Trolley with suitable Insulator Blocks and all other accessories as per manufacturers specifications and as directed.

[B] The Transformers shall be provided with following Terminal Arrangement & Fittings and rate quoted against respective item is deemed to be included for the same: Terminal Arrangement: [a] HV & LV Side: Cable Box [b] Quad furcating cable box with compression gland for PVC Cable and One additional neutral terminal shall be brought out separately for earthing purpose on LV Side. [c] First filling of new and unused Transformer Oil [IS – 335 Marked], filtered and tested up to 60KV dielectric strength at 2.5mm air gap between testing electrodes. Certification of dielectric strength shall be submitted by the Contractor after filling the oil. Transformer Oil shall be got tested by AED. [d] Apart from routine tests mentioned in these tender documents and relevant IS, pre-commissioning inspection of Transformer shall be carried out by Senior Electrical Inspector / Electrical Inspector.

[C] Fittings: [a] Externally hand operated Off–Circuit Tap Switch with position indicator and locking device. [b] Conservator with Oil Gauge, filling hole with plug & drain hole with plug [c] Undercarriage with four plain rollers [d] Oil filling hole cum air release plug [e] Drain Valve cum Sampling Valve [f] Top Filter Valve with Plug [g] Rating Plate with Diagram Plate [h] Lifting lugs for Transformer [j] Lifting lugs for Core [k] Earthing Terminals [l] Thermometer Pockets [m] Silica Gel Breather [n] Explosion Vent [o] Double Float Buchholz with alarm and trip contacts including control cable of copper conductor of size 7 core 1.5 sqmm-30m length. [p] 150mm size Oil Temperature indicator, dial type with alarm and trip contacts [q] 150mm size Winding Temperature indicator, dial type with alarm and trip contacts [r] Buchholz Relay with 2 Shut-Off Valves [s] Marshalling Box with Double Window [t] OCTC

Supplying, laying and testing HT UG Cable, XLPE insulated, screened insulated, steel strip armoured and pressure extruded PVC bedded, 11000 Volts grade [heavy duty] suitable for Earthed System with aluminium conductor of size 3 Core, 95 Sq.mm conforming to IS – 7098 [Part – II] laid in trenches, fixed to walls or passing through pipes and connecting up complete all as specified and as directed.

M & L for Cable End Termination Joint, Heat Shrinkable type, Outdoor type, suitable for 11000 Volts, 3 Core, 95 Sq.mm, HT, XLPE Insulated, Armoured Power Cable with Aluminium Conductor and testing after jointing complete all as specified and as directed.

M & L for Cable End Termination Joint, Heat Shrinkable type, Indoor type, suitable for 11000 Volts, 3 Core, 95 Sq.mm, HT, XLPE Insulated, Armoured Power Cable with Aluminium Conductor and testing after jointing complete all as specified and as directed.

Supplying, laying and testing XLPE insulated and PVC sheathed, armoured heavy duty underground cable, ISI marked with aluminium stranded conductor 1100 Volt grade of size 3½ Core, 400 Sq.mm cross section suitable for earthed system, laying in trenches / duct / fixed to poles / drawn through pipes / sleeving through pipe in duct, including suitable size Double compression copper stainless steel cable gland, crimping type cable lugs, sockets etc. complete all as specified and as directed.

OPS Associates

MONA GENERATOR SEVICES PVT. LTD.

Gulmarg Electrical Service