The AC withstand voltage test is a destructive test in the insulation test. It can only be carried out after other non-destructive tests (such as insulation resistance and absorption ratio test, DC leakage test, dielectric loss tangent and insulation oil test) are passed. After this test is passed, the transformer can be put into operation.

What are the methods of AC withstand voltage test based on series parallel resonance principle? What are the conditions for voltage resonance? What are the conditions for current resonance? What are the methods of series resonance withstand voltage test of transformer? What are the precautions during the series voltage withstand test of the transformer? What are the possible reasons for unqualified insulation of power equipment during voltage withstand test?

What are the methods of AC withstand voltage test based on series parallel resonance principle? What are the conditions for voltage resonance? What are the conditions for current resonance? What are the methods of series resonance withstand voltage test of transformer? What are the precautions during the series voltage withstand test of the transformer? What are the possible reasons for unqualified insulation of power equipment during voltage withstand test?