TESTING

Transformer Testing

1. Measurement of winding resistance
2. Temperature-rise test
3. Separate source ac withstand voltage test
4. Induced overvoltage test
5. Measurement of insulation resistance
6. Measurement of voltage ratio and Check of phase displacement/voltage vector relationship
7. Measurement of short-circuit impedance and Load loss
8. Measurement of no load loss and current
9. Measurement of zero sequence impedance(s) on three-phase transformers
10. Measurement of neutral current
11. Pressure test (Type test)
12. Pressure test (Routine test)
13. Measurement of harmonics of no-load current
14. Measurement of no-load current at 112.5% voltage
15. Magnetic balance test on 3-phase transformer
16. Permissible flux density and over fluxing
17. Oil leakage test
18. Determination of sound level
19. Determination of capacitances windings-to earth, and between windings
20. Measurement of dissipation factor (tan delta) of the insulation system capacitance
21. Lightning impulse test

Current Transformer Testing

1. Determination of errors according to the appropriate accuracy class
2. Verification of terminal marking and polarity
3. Temperature rise test
4. Measurement of winding resistance
5. Instrument Security current test
6. Composite error test
7. Knee point voltage and excitation current test
8. Power frequency dry withstand test on primary winding
9. Power frequency dry withstand test on secondary winding
10. Power frequency voltage withstand test between sections
11. Over voltage inter-turn test
12. Turns ratio test
13. Determination of secondary loop time constant
14. Short time current test
15. Lightning impulse test
16. Measurement of Capacitance and loss factor (Tan delta) of current transformer
17. Partial Discharge test

Potential Transformer Testing

1. Verification of terminal marking and polarity / Verification of marking
2. Temperature rise test
3. Induced over voltage withstand test / Differential mode AC voltage test on primary terminals
4. Separate source voltage withstand test / Common mode power frequency dry withstand test on primary terminals
5. power frequency dry withstand test on secondary windings
6. Determination of errors according to the requirements of appropriate accuracy class / Test for accuracy
7. Power frequency voltage withstand between sections
8. Short circuit withstand capability test
9. Partial Discharge test
10. Lightning impulse test
11. Measurement of Capacitance and loss factor (Tan delta) of voltage transformer

Reactor Testing

1. Measurement of reactance
2. Measurement of loss
3. Measurement of zero-sequence reactance on three-phase reactors
4. Measurement of mutual reactance on three-phase reactors
5. Measurement of the power taken by the fan and the oil pumps
6. Measurement of impedance of continuous current
7. Measurement of inductance
8. Q factor measurement
9. Measurement of current at all adjustments
10. Measurement of linearity of reactance
10. Turns ratio error test
11. Determination of secondary loop time constant

Other Testing

Other Test Facilities:
1. Safety testing
2.We have switchgear testing facility as per customer’s requirement and        applicable Indian and international standard.

The test facility for,

• Cable & House wire Testing,
• MCB & ELCB,
• Fan,
• Exhaust Fan,
• Fan Regulator,
• Switch, Socket, etc

Major Product Testing

1. Transformer And Reactor:
– Power Transformer
– Distribution Transformer
– Dry-Type Transformer
– Reactor Testing
2. Instrument Transformer:
– Current Transformer
– Potential Transformer
3. HV And LV Electrical Products:
– Switchgear Products
– Control Panels & Power Panels
– Cables and Wires
– Indoor and Outdoor Lights
– Home Appliances product