伊藤 聡太郎

The breakdown voltage test of transformer oil is conducted using a device specifically designed for this purpose, such as the Globecore tester. The oil sample is placed in a test cell with two electrodes, typically made of stainless steel, with a specific gap distance. A controlled voltage is gradually applied across the electrodes while monitoring the voltage level. The dielectric strength of transformer oil is determined by the voltage at which a spark (or breakdown) occurs between the electrodes, indicating the oil’s ability to resist electrical breakdown. It’s important to ensure that the sample is free from contaminants and bubbles to obtain accurate results. The unit of dielectric strength of transformer oil is expressed in kilovolts per millimeter (kV/mm), providing a clear measure of the oil’s insulating properties.

A transformer oil BDV (Breakdown Voltage) test kit is designed to evaluate the electrical insulation properties of transformer oil. It operates by placing a sample of the oil in a testing cell that contains two electrodes. The kit applies a controlled voltage between these electrodes and gradually increases it until the oil breaks down, leading to electrical discharge. The maximum voltage at which the oil remains insulating is recorded as the BDV, indicating the oil’s ability to withstand electrical stress. A higher BDV value signifies better insulating properties, which is crucial for ensuring the reliability and safety of transformers. Globecore offers advanced transformer oil BDV test kits that adhere to industry standards and provide accurate and reliable measurements for maintenance and diagnostics of industrial oils.