What is the procedure for transformer oil dielectric test equipment and what parameters are evaluated?

The procedure for transformer oil dielectric testing involves collecting a sample of the oil and using a dielectric strength tester. The equipment applies a voltage to the oil until breakdown occurs, measuring the voltage at which this happens. Key parameters evaluated include the dielectric strength, which indicates the oil’s insulating properties, and the presence of contaminants or moisture, which can affect performance. Regular testing ensures the reliability and safety of power transformers.