Repairing of 15/24/30/48 KVA Automatic Voltage Regulators (AVRs) at important Exchange/BTS sites under Bhubaneswar BA for the Year 2025-26ar 2025-26

Making conveyance arrangements for AVR technicians along with spare parts, tools and instruments etc. for attending the AVR faults at different Telephone Exchange / Mobile BTS sites on need basis etc. as required.

Distance up to 25 Kms from Bhubaneswar

Distance above 25 Kms and up to 100 Kms from Bhubaneswar

Distance above 100 Kms and up to 200 Kms from Bhubaneswar

Attending breakdown faults, physical Inspection of the Servo motor operated Automatic Voltage Regulators (AVR) ( 15 to 100 KVA) , checking the electrical connections, tightening if required, , testing and recording the input and out put voltages, detecting the faults, assessing the list of materials required for repairing, rectification of minor faults and restoration in case of minor faults etc as reqd. (Materials are not included in this item)

Opening of the top/side/front/back covers of the AVR (15-100KVA), cleaning with air blower (For air cooled AVR), checking the internal electrical connections, functioning of control cards, Variacs, Buck and Boost Transformer, Servo motors and carbon contacts, replacement of limit switches, toggle switches, meters, indicators, RC networks, MCBs, Bypass switches, burnt out wires/cables, carbon contacts etc., complete as required. (materials are not included in this item)

Replacement of the faulty/burnt out damaged spare parts of the 24/30/48/60/100/120 KVA Air/ Oil cooled AVR by new ones of the following types and ratings of approved make etc. as required.

Carbon Brush Contacts 100/150 Amps

Auto manual toggle switch, 10 Amps

Phase splitter (RC Network)

Buck Boost Toggle switch, 10 Amps

Limit switch

Push button switch

Pinion set (Metal/Nylon)

Al. Gear for variac

Replacement of the faulty/burnt out control cards/Servo motors / Contactors / MCBs / bypass switches etc. of 15/24/30/48/60/100 KVA Air/ Oil cooled AVR by new ones of following ratings and approved make i/c dismantling the old ones, fixing the good ones, connection, testing etc. complete as required.

Servo Motor Control card with control Transformer

Servo (AC Synchronous) Motor, 10 Kg-cm Torque, 90-300 volt, 50 Hz, 60 RPM

Servo (AC Synchronous) Motor, 3 Kg-cm Torque, 90-300 volt, 50 Hz, 60 RPM

40 Amps 415 volts 50 HZ, 3 pole, suitable for AC3 continuous Robust and hostile applications conforms to IS/IEC 60947-4-1 & IEC 60947-4-1 (Make- L&T, Type- ML) / Equivalent model of BCH/Siemens

70 Amps 415 volts 50 HZ, 3 pole, suitable for AC3 continuous Robust and hostile applications conforms to IS/IEC 60947-4-1 & IEC 60947-4-1 (Make- L&T, Type- ML) / Equivalent model of BCH/Siemens

40 Amps 415 volts 50 HZ, 3 pole MCB (C- Series) (Make-Legrand /SS)

63 Amps 415 volts 50 HZ, 3 pole MCB (C- Series) (Make-Legrand /SS)

40 Amps 415 volts 50 HZ, 4 pole MCB change over switch (Make-Legrand /SS)

63Amps 415 volts 50 HZ, 4 pole MCB change over switch (Make-Legrand /SS)

Replacement of the burnt out / damaged cables/wires/cable glands /sockets/lugs for cables by the followings i/c connection of new cables, fixing / crimping of new glands/ lugs/sockets etc. as required.

16sqmm PVC insulated FRLS copper conductor flexible Cable

Copper lugs/sockets for 16sqmm Cable

Cable Gland for 3.5X50sqmm Al. conductor armoured cable

Aluminium Socket/Lugs for 50sqmm cable

Aluminium Socket/Lugs for 16-25sqmm cable

0-500V panel mounted type Volt meters (72mmX72mm/96mmX96mm)

0-100A panel mounted type Ampere meters (72sqmm/96sqmm)

16/22.5mm LED Indicators

150/200 Amps 4 pole Stud connector

Replacement of the burnt out/faulty variac of the 24/30/48/60/100/120 KVA Air/ Oil cooled AVR by new ones of following ratings and approved make variacs of copper wound on silicon CRGO toroidal laminated cores with Input voltage 120V to 270V and output voltage 220+1% i/c dismantling the old ones, fixing the new ones, connection, testing etc. complete as required.

20Amps/28 Amps/32 Amps

50Amps/60Amps

Replacement of composite type wide range 10 KVA ( 120-260 V range) variac including making required tapings interconnection testing etc. complete as required.

Repairing Servo motor control cards i/c replacement of faulty components by new ones of suitable ratings etc. as required.

Removing the job of of the oil cooled AVRs by the help of chain pulley and re-installation after repairing etc. complete as required.

Top up of suitable grade and superior quality Transformer oil for the oil cooled AVRs etc. as required.

De-hydration of the Transformer oil of oil cooled AVR and measuring the insulation (BDV) of transformer oil etc. complete as required.

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