What is a transformer oil BDV tester used for in power transformers?

A transformer oil BDV tester is used for measuring the breakdown voltage (BDV) of transformer oil in power transformers. This test assesses the oil’s insulating properties and its ability to withstand electrical stress. A higher BDV indicates better insulation quality, which is crucial for preventing electrical failures and ensuring the reliable operation of power transformers. Regular BDV testing helps in monitoring the condition of the transformer oil over time.