POTENTIAL TRANSFORMER TESTING
Potential Transformer is designed to present a negligible load to the supply being measured and has an accurate voltage ratio and phase relationship to enable accurate secondary connected metering.
- Verification of terminal marking and polarity / Verification of marking
- Temperature rise test
- Induced over voltage withstand test / Differential mode AC voltage test on primary terminals
- Separate source voltage withstand test / Common mode power frequency dry withstand test on primary terminals
- power frequency dry withstand test on secondary windings
- Determination of errors according to the requirements of appropriate accuracy class / Test for accuracy
- Power frequency voltage withstand between sections
- Short circuit withstand capability test
- Partial Discharge test
- Lightning impulse test
- Measurement of Capacitance and loss factor (Tan delta) of voltage transformer
For Potential Transformer Testing:-
Applicable standard
1) For potential transformer: IS 3156, IS 16227, IEC 61869