What is the breakdown voltage of transformer oil in power transformers?

The breakdown voltage of transformer oil in power transformers is a critical parameter that indicates the oil’s insulating strength. Typically, the breakdown voltage of transformer oil should be above 30 kV for effective performance. Factors such as moisture content, particulate contamination, and oil degradation can significantly affect this voltage. Regular testing and maintenance are essential to ensure the transformer oil maintains its breakdown voltage to prevent electrical failures.