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Factory Tests

2020-07-09


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This technical article briefly describes seven very important tests you should perform during commissioning of a dry-type transformer. Usually tests are performed in the factory where transformers are produced.


The following routine tests must be carried out on all dry-type power transformers:

  1. Separate-source voltage withstand test 

  2. Induced voltage test

  3. Voltage ratio measurement and check of polarities and connections

  4. No-load current and  no-load loss measurement

  5. Winding resistance measurement

  6. Short-circuit impedance and load loss measurement

  7. Partial discharge measurement in accordance with IEC 60726(for dry-type power transformers)



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