NIT_NO_02 (2023-24)_ITEM_NO_01_EE(SDW)-I

S/I/T/C of VCB & Accessories for 1530 HP, 11 KV Motor set No. 2 at Ring Road SPS by carrying out following works:- Vacuum Circuit Breaker 11 KV 3 Phase having:- a) 230 V AC Motorized Mechanism. b) Shunt rip / close coils – 24 VDC. c) Aux. Contactor – 4 NO + 4 NC. d) 3 Ph, D/O TYPE, 11 KV/Sqrt.3/110V/Sqrt.3, Class-1, Burden-100 VA. e) Digital Volt meter with VSS. f) Digital Amp. Meter with VSS. g) Indicating lamps LED type, Breaker ON-Red, Breaker-OFF-GREEN, Auto trip indication – Amber, TRIP Circuit Healthy-CLEAR, SPRING Charged-Blue, RYB Indication. h) Accessories Push Button for trip circuit healthy check, Emergency Trip Button, Local Remotic Switch, Trip Neutral Close Switch, Panel Space Heater with Thermostat & switch, Panel Illumination Lamp with Switch, Door Operated Switch, Timer, Window Annunciation with hooter. Make:- ABB / CROMPTON / JYOTI.

Wireless bus bar Temperature Monitoring System with controller type spread spectrum Tech. with 9-27 sensor communication ,frequency :2.4 GHz IEEE802.15.4 Alarm mode Buzzer relay for hooter & relay for circuit breaker , Minimum Reception Range : Omni directional 300fts line of sight ,Range reduce by obstructions ,operating Temperature -280 C to 850C integrates online temperature measurement, data collection, data analysis and control function Make: Amptronics / RNS.

Bus Bar sensor & RF Transmitter ,nonconductive silicon strap with stand up to 3000 C operating temperature -400 C to 1250 C , Transmission interval every 30 sec -300sec ,Transmission Range 50-100ft Application Area Circuit Breaker Contact, Input & Output bus bar of switch gears, bearing & winding of the motor ,High temperature air out lets, Power distribution Transformer Make: Amptronics /RNS.

Supply & laying of copper control cable of 12 core 2.5sq mm as required at site with various equipment’s.

RELAYS Numerical Non Communicable Non draw out type with 50/50N/51/51N Protection, Master Trip Relay, Auxiliary Relay for Transformer Fault Make: CGL.

S/O End jointing indoor termination heat shrink kit suitable for 11 KV HT 240 sq. mm 3 core size aluminum cable. Make:- 3M / Raychem / M-seal / Denson.

XLPE insulated cores laid up, Thermoplastic tape inner sheathed armored and extruded PVC type ST2 outer sheathed as per IS 7098 (Part-I) 1988 HT 11 KV(E) 3 core 240sqmm. Make:- Gloster / Havells / ICC / CCI / Polycab.

Dismantling of old damaged cable connection from panel and motor after shut down of main supply as per instruction of engineer in charge without effecting the pumping.

Laying of one number PVC insulated & PVC sheathed / XLPE power cable of 11 KV Grade above cables in cable trench & dressing of other cable laying in pump house for motors. & making connection from panel to motor & motor to starter.

Making of indoor cable termination with heat shrinkable jointing kit complete with all accessories including lugs suitable for following size of 3 core XLPE aluminum conductor cable of 11 KV grade as required and making all electrical connection of motors.

P/F of Brass stud contact with nut & bolt as per sample.

Repairing renovation of oil immersed imported rotor starter 3 phase 1530HP suitable to operate HT motor by dis connection & taking out the starter from deep inside in pump house through help of crane & heavy labour.

Replacement of copper contact in starter as per sample.

Replacement of bake lite Base board having hole & stud with nut / bolt & washer as per sample.

Replacement of copper stud as per sample.

Replacement of urika wire set on resistance proclaim tube as required.

Re- installation of starter at site & making cable connection.

Fitting of the VCB unit in spare feeder of VCB panel on racking system for proper rack in rack out.

Making bus bar, link, bends, straight as required to connect new VCB with existing main bus bar duly sleeved with heat resistance sleeve.

P/F of Protection CT class 5P10 for relay current sensing.

Installation /Fitting of protection relay for new VCB feeder by making cut out on existing feeder as per suitable size of relay & making control wiring with 2.5 mm copper wire & setting tripping parameters as per site requirement by skill engineer .

Testing & Commissioning of the above work as follow:- - Continuity and earthing. - Polarity of current Transformer. -Breaker mechanism and alignment. -Meggering of all equipment’s for phase to phase, neutral to body, neutral to earth and phase to earth. - All functional tests. -Checking for all tightness of nuts and bolts. -Alignments of doors etc. -interlocking tests.

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