What is the procedure for the transformer oil breakdown voltage test?

The transformer oil breakdown voltage test procedure involves several key steps to ensure accurate measurement and assessment of the oil’s insulating properties. First, select an appropriate Globecore breakdown voltage tester designed for transformer oil analysis. Next, ensure the sample of transformer oil is clean and free of water and particulate contamination, as these factors can influence results. Fill the test cell of the Globecore tester with the oil sample up to the specified level, ensuring that the electrodes are properly aligned. Set the tester according to the manufacturer’s guidelines, selecting the desired voltage ramp rate. Initiate the breakdown voltage test, which typically involves gradually increasing the voltage until a spark or breakdown occurs between the electrodes. Record the breakdown voltage value at the moment of failure, as this indicates the insulating capability of the transformer oil. Following the test, clean the test cell and electrodes thoroughly to prevent cross-contamination for future tests. Always adhere to safety protocols during the procedure to mitigate risks associated with high voltages.