How is a BDV tester used for transformer oil?

A BDV tester, or breakdown voltage tester, is essential for assessing the insulating properties of transformer oil. To utilize the BDV tester for transformer oil, you begin by ensuring that the oil sample is free from moisture and particulate contamination. The test involves filling the test cell of the BDV tester with the oil sample, ensuring that the electrodes are properly positioned and that the oil completely covers them. The BDV tester then applies a gradually increasing voltage across the electrodes until breakdown occurs, indicated by a spark or arc between the electrodes. This measurement is crucial as it reflects the oil’s ability to resist electrical breakdown under stress. Proper execution of the bdv test procedure is critical for ensuring transformer reliability and longevity, as it helps in identifying potential issues caused by contamination or degradation of the oil. Regular testing using a BDV tester is recommended to maintain optimal transformer performance.