Renovation or Upgradation and Shifting of Power Distribution Panels at Technical Board Office Sector 36 Chandigarh

SCHEDULE -1

Supply, Erection, Testing and Commisioning of 11kV, 3Phase, 50Hz, Indoor metal clad, floor mounted, 'Horizontal draw out' type VCB (Vacuum Circuit Breaker) switch board unit 630 Amp. which includes 630/800 Amp. Vacuum Circuit Breaker for Incoming/ Out going feeder with Electrolytic Copper bus bars of suitable rating, Horizontal Isolation type as per IEC 62271-100-200. The Switchgear panels shall be sheet steel construction with sheet steel not less than 2.5mm thickness for load bearing sections and not less than 2mm thickness for non-load bearing, dust, moisture and vermin proof to provide a degree of protection IP- 4X in accordance with IS:13947. VCBs are type tested according to International Standards IEC-62271 at renowned laboratories. They are compact, safe and reliable. The Panels shall be tested for IAC level of 25kA/1 Sec. No. of operations of Vacuum interrupter bottles for better performance (i) At rated current: 10,000 operation (ii) No. of short circuit dead operation at rated short circuit current 50 opeartion Complete in all respect as Desire By The Engineer Incharge of Work at Site.

VCB parameters are as below: (a). Rated Voltage: 12kV (b). Rated short circuit breaking current withstand: Min. 25kA for 3sec.. (c). Rated insulation voltage lightning (Impulse withstand): At 75kV Peak (d). Rated insulation voltage(Power frequency withstand): Min. 28kV (e). Rated operating sequence: 0-0.3 sec-CO-3 min-CO (f). Spring charging mechanism: Manually as well as motor operated (230V, AC, 50Hz) (g). Operation type: Manually and electrically open (Electrical-230V, AC, 50Hz) (h). Earthing Switch: Mechanically interlocked device to prevent personnel from getting electric shock during breaker maintenance VCB Incorporating mechanical as well as electrical ON/OFF indiaction "OFF" push button, test/ serviceposition limit switches, with minimum 6NO+6NC breaker auxiliary contacts in service position, Manual charging of breaker should be done without opening the front door.

Incomer shall consist of: (a). Cast Resin CT's 11kV: 600-300/1-1A, Core1: Class1, 10VA for 3phase, Core2: 5P10, 10VA (b) Cast Resin PT's 11kV: PT Ratio 11kVN3/110V/N3/110V/V3, Class 1, Class 0.5 Burden 50VA (c). Protections: Numerical instantaneous IDMTL mimic dispaly relay (230V, AC, 50Hz): UV, ON, EIF, OIC, SIC & TCS with RS 485 Modbus protocol for communication & drawout type (d). Master Trip/ Anti pumping relay (e). Digital Voltmeter: Range 0-12kV with necessary voltmeter with built in selector switch & suitable for 230V AC 96x96 sq.mm dial with shrouded terminal (f). Digital Ammeter: Applicable Range with necessary ammeter with built in selector switch & suitable for 230V AC 96x96 sq.mm dial with shrouded terminal (g). Multi-function meter with suitable communication to Central Software dta control & SCADA system, Converter having facility of real time data monitoring historical trend and web dashboard (h). Necessary AC supply, healthy indication lamp & switch, TNC (Trip, Neutral & Close) breaker control switch with indicating arrangement, All the relays shall belong to a common platform and shall be of single make with Electro-mechanical type relays in draw-out casing PCB shall be with conformal coating to withstand heavily polluted environments.

Outgoing shall consist of: (a). Cast Resin CT's 11kV: 600-300/1-1A, Core1: Class1, 10VA for 3phase, Core2: 5P10, 10VA (b). Protections: Numerical instantaneous IDMTL mimic dispaly relay: E/F, O/C, S/C & TCS with RS485 Modbus protocol for communication & drawout type for line feeder protection (c). Master Trip/ Anti pumping relay (d). Transformer Protection: 3 elements auxiliary relay (230V, AC, 50Hz) for transformer fault, Alarm for Buchholz, winding temperature & oil temperature (e). Digital Ammeter: Applicable Range with necessary ammeter with built in selector switch & suitable for 110V AC 96x96 sq.mm dial with shroded terminal (f). Multi-function meter with suitable communication to Central Software dta control & SCADA system, Converter having facility of real time data monitoring. historical trend and web dashboard (g). Necessary AC supply, healthy indication lamp & switch, TNC (Trip, Neutral & Close) breaker control switch with indicating arrangement, Local/ remote selector switch for breaker open/close operations All the relays shall belong to a common platform and shall be of single make with Electro-mechanical type relays in draw-out casing PCB shall be with conformal coating to withstand heavily polluted environments:-

Feeder

No of Feeders 01

Vacuum Circuit Breaker - INCOMER (1NO.)

11kV, 630/800A with spring charging motor rated for 230V AC, tripping coil and closing coil at 110V DC. Qty-01

Vacuum Circuit Breaker - OUTGOING-2NOS.