why bdv test of transformer oil?

The BDV (Breakdown Voltage) test of transformer oil is crucial for assessing the oil’s insulating properties. This test measures the voltage at which the oil fails to insulate, indicating its ability to prevent electrical breakdown. A higher BDV value signifies better insulation quality, which is essential for the reliable operation of transformers. Regular BDV testing helps identify contamination or degradation in the oil, ensuring the transformer’s efficiency and longevity.