What is the procedure for oil BDV testing of transformers?

The procedure for oil BDV (Breakdown Voltage) testing of transformers typically involves using a megger BDV test kit, which is specifically designed for this purpose. First, ensure the transformer oil sample is clean and free from any contaminants. Prepare the megger BDV test kit by setting it up according to the manufacturer’s instructions. Fill the test cell of the kit with the transformer oil sample to the recommended level. Once the sample is in place, select the appropriate voltage settings on the megger BDV test kit, typically starting at a low voltage and gradually increasing it until the oil breaks down, indicated by a sudden drop in the displayed voltage. Record the breakdown voltage value, which provides insights into the insulation quality and presence of moisture or contaminants in the oil. Conduct multiple tests to ensure accuracy and consistency, then analyze the results to assess the condition of the transformer insulation system. Properly dispose of the used oil sample and clean the test kit after completing the procedure.