REPAIR REPLACEMENT AND PRIODICAL MAINT OF TRANSFORMER POWER TRANSFORMER COMPACT SUB STATION HT CABLE VCB CT PT AND ALLIED WORKS AT AF STN TEZPUR UNDER GE (AF) TEZPUR.

Servicing, Repairing and Maintenance of existing HT 11 KV,400/630/800 Amps rating VCBs (Make : Crompton Greaves/ Areva ‘Alstom’/ Schneider/ Seimens/ ITE/Andrew Yule) by removing from housing, overhauling the mechanical parts and periodic maintenance servicing of 11KV indoor/ outdoor VCBs, checking of quality of vacuum interrupter, insulation resistances, static contact resistance, testing ( IR value, Ratio Test, Polarity) and connection checking of 11 KV Current Transformer ( Set of Three) by primary injection kit ,testing and calibration of relay ( Set of, Two Over Current and One Earth Fault Relays) by secondary injection kit including,all other functional tests of the VCB panels including for CTs, PTs, complete all as specified and directed. Notes:- (i) The work shall be carried out through Authorised & Qualified agencies as approved by the Engineer in Charge. (ii) Calibration and Testing(s) shall be done through State Electrical Licencing Board's valid electrical licence holder for the appropriate class/category of the work as approved by the Engineer in Charge. (iii) Spare Parts for replacement will be measured and paid seperately under respective items of this BOQ here in after.

Supply Only, Breaker Control Switches,TNC (Trip,Neutral and Close), rating 25 Amps with contact arrangement 1Trip + 1Close, barrel lock mounting type, suitable for 11 KV VCB panels, complete all as specified. (Cat No 73257SEB90PGBB

Supply Only, heater with heater switch & thermostat suitable for 11KV VCB panels, 80 watts, as per OEM's specifications,complete all as specified.

Supply Only, HT Current Transformers, single phase indoor solid state (Resin cast) 11 KV, ratio 200/5A, accuracy class 5P10, rated burden 15VA, STC 13.1 KA for 1second,suitable for VCB Panels as per OEM's specifications,complete all as specified.

Supply Only,microprossesor based feeder protection neumerical relay with overcurrent, earth-fault, phase-discontinuity, negative-phase sequence and thermal-overload protections, inrush current detection, reclosing and measurement,preconfigured functionality facilitates, configurable binary inputs/outputs using local HMI or communication interface,modbus and IEC 60870-5-103 protocols supports,universal power supply 24-265 V AC/DC,suitable for 11 KV VCB panels,complete all as specified. (Cat No REJ601 of Make ABB or equivalent Model of Make: Schneider/ Seimens)

Supply Only,auxiliary relay with high-speed operation,rated voltage 24Volts DC,operating range - 30% to +10% of rated voltage,frequency 50 Hz +/-5%,pick-up voltage < 80%,Drop-off voltage > 20% ,Pick-up time 20-30ms,contacts 6N/O + 1N/C,suitable for 6.6 KV VCB panels,complete all as specified.

Supply Only,Vacuum Interrupter Assembly with Flex connection (R Phase, Y Phase & B Phase) suitable for 11 KV,630/800 Amps VCB Panels as per OEM's specifications,complete all as specified.

Supply,installation,testing and commissioning of, Motor with Gear Assembly,110 Volts/230 Volts AC (Make Bosch/ Webtool/Ralliwolf) suitable for 6.6 KV VCBs as per OEM's specifications,complete all as specified and directed.

Supply Only base mounting type power pack with capacitor back up unit input voltage 230 V, output voltage 110 Volt DC, stored output 100 W sec, non store output 100W, with mains ON indicator,suitable for 11 KV VCB panels,complete all as specified. Cat No. “CPP-1-U110-W100”

Supply Only, fibre panel spout, 12Kv,50/60 Hz,suitable for 11 KV, 630/800 Amps VCB Panels (ABB VD4 11KV Monobloc 1250Amps) as per OEM's specifications,complete all as specified.