what is bdv value of transformer oil?

The BDV (Breakdown Voltage) value of transformer oil is a critical parameter that indicates the oil’s insulating strength. It measures the voltage at which the oil will conduct electricity, leading to a breakdown. Typically, a BDV value above 30 kV is considered acceptable for new transformer oil, while lower values may indicate contamination or degradation. Regular testing of BDV helps ensure the reliability and safety of transformers in electrical systems.