What is the expected dielectric strength of transformer oil?

The expected dielectric strength of transformer oil typically ranges from 30 kV to 70 kV, depending on the oil’s purity and condition. To accurately measure this value, using a Globecore BDV tester is essential, as it provides precise readings of the breakdown voltage (BDV), which is an indicative measure of the oil’s insulating properties. Regular testing is crucial to ensure the oil remains within the optimal dielectric strength parameters, as deteriorating oil can affect the overall performance and safety of transformers. Always refer to the manufacturer’s specifications and guidelines to determine the acceptable BDV test value for specific applications.