Field tests required before commissioning of power transformers?

Question

Accepted Answer

Field tests required before commissioning of power transformers include insulation resistance test, turns ratio test, and polarity test.

Insulation resistance test is conducted to ensure the insulation system is intact and can withstand the operating voltage.
Turns ratio test is performed to verify the turns ratio of the transformer and ensure it meets the design specifications.
Polarity test is carried out to confirm the correct connection of primary and secondary windings.
Other tests may include winding resistance test, short-circuit impedance test, and dielectric withstand test.
Field tests help identify any potential issues or defects before the transformer is put into service.

Accepted Answer

Vector group test

BDV test

Turn ratio test

Insulation test

Earthling test

Tapping test

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