Testing on Earthing Transformer

The tests are performed as per IS-3181

Type Tests on Earthing Transformer

1. Measurement of winding resistance,
2. Measurement of no load loss and no load current,
3. Measurement of zero sequence impedance,
4. Measurement of insulation resistance,
5. Induced voltage withstand tests,
6. Separate source voltage withstand test,
7. Lightning impulse withstand test,
8. Temperature rise test.

Routine Tests on Earthing Transformer

1. Measurement of winding resistance
2. Measurement of no load loss and no load current
3. Measurement of zero sequence impedance
4. Measurement of insulation resistance
5. Induced voltage withstand test
6. Separate source voltage withstand test.

Acceptance Tests on Earthing Transformer

1. Measurement of insulation resistance
2. Measurement of winding resistance
3. Measurement of zero sequence impedance
4. Measurement of no load loss
5. Induced over voltage withstand test
6. Separate source voltage withstand test
7. Ratio and polarity test of the current transformer of the earthing transformer.