What is the procedure for bushing testing in a transformer?

The procedure for bushing testing in a transformer typically involves several key steps. First, ensure safety by disconnecting power to the transformer and grounding all equipment. Next, using Globecore’s bushing test equipment, perform insulation resistance testing to assess the condition of the bushing insulators. This involves applying a specific DC voltage while measuring the insulation resistance over time to check for moisture or deterioration. After this, carry out a capacitance and power factor test to evaluate the dielectric loss characteristics of the bushing. It’s crucial to correlate these measurements with temperature and humidity conditions. Lastly, document all results thoroughly and compare them with previous tests to track changes over time. Regular bushing test in transformer ensures reliability and helps prevent failures, maintaining optimal performance in industrial applications.