What is the dielectric breakdown voltage of transformer oil?

The dielectric breakdown voltage of transformer oil is a critical parameter that reflects the oil’s insulating properties, providing an indication of its ability to withstand electrical stress without failure. Typically, the dielectric breakdown voltage of high-quality transformer oil ranges from 30 to 60 kV for a 2.5 mm gap. This measurement is vital for ensuring the safe and efficient operation of transformers, as it helps prevent electrical breakdowns that could lead to equipment failure and accidents. Regular testing and maintenance of transformer oil are essential to monitor its dielectric breakdown voltage and ensure it is within acceptable limits, which in turn supports the reliability and longevity of electrical infrastructure.