How is the dielectric strength of transformer oil determined?

The dielectric strength of transformer oil is determined using a device known as a dielectric strength tester, which applies a controlled voltage to a sample of oil until breakdown occurs. This involves submerging metal electrodes in the oil and gradually increasing the voltage until the oil’s insulating properties fail, resulting in an electrical discharge. The voltage at which this breakdown occurs is recorded as the dielectric strength of the transformer oil. Globecore offers advanced dielectric strength testers designed for accurate and reliable measurements, ensuring the quality and safety of transformer oils used in industrial applications. Regular testing is essential for maintaining optimal performance and preventing equipment failure due to oil deterioration.