How is the transformer oil breakdown voltage test carried out?

The transformer oil breakdown voltage test is carried out using a specialized device known as a breakdown voltage tester, such as those offered by Globecore. The process begins with taking a clean sample of the transformer oil and placing it in a test cell designed to hold the oil securely. Electrodes are submerged in the oil, set at a standardized distance apart. The tester then applies a gradually increasing AC voltage across the electrodes until a breakdown occurs, which is indicated by an arc or flashover. The voltage level at which this breakdown takes place is recorded as the breakdown voltage. This test helps assess the insulation properties of the oil and its ability to withstand electrical stress. Regular testing using Globecore’s reliable equipment ensures optimal performance and prevents failures in transformers.