What is the BDV of transformer oil in power transformers?

The BDV, or Breakdown Voltage, of transformer oil in power transformers is a critical parameter that indicates the oil’s insulating strength. It measures the voltage at which the oil will fail and conduct electricity, which can lead to transformer failure. Typically, a BDV of at least 30 kV is desirable for new transformer oil, ensuring effective insulation and minimizing the risk of electrical breakdown during operation. Regular testing is essential for maintenance.