How is the dielectric breakdown voltage of oil tested?

To determine the breakdown voltage of oil, Globecore offers various dielectric strength testers that work on the principle of applying a controlled voltage to a sample of the oil until an electrical discharge occurs. The tester typically involves placing a sample of oil in a test cell with two electrodes. The voltage is gradually increased, and the point at which the oil fails to insulate and allows current to pass through is recorded as the breakdown voltage. This measurement is critical as it indicates the oil’s ability to resist electrical failure, which is essential for ensuring the reliability of electrical insulation systems in industrial applications. This process ensures that the oil can effectively perform its function without causing equipment failure due to dielectric breakdown.