How is the breakdown voltage test for transformer oil performed?

The breakdown voltage test for transformer oil is performed using a device called a transformer oil tester, specifically designed for this purpose. The procedure typically involves taking a sample of the transformer oil and placing it in a testing cup, where two electrodes are positioned at a specified distance. The tester gradually applies an increasing voltage across the electrodes until the oil breaks down and conducts electricity, resulting in a spark. The voltage at which this breakdown occurs is recorded as the breakdown voltage. It’s essential to conduct this test under controlled conditions, adhering to relevant standards, to ensure accuracy and reliability in assessing the insulating properties of the transformer oil. Globecore offers high-quality testers that ensure precise measurements for this critical evaluation.