What is corrosive sulfur in transformer oil?

Corrosive sulfur in transformer oil refers to certain sulfur compounds that can cause deterioration and corrosion of transformer materials, particularly copper and other metals. When these compounds are present in transformer oil, they can lead to the formation of conductive and corrosive corrosion products, ultimately leading to transformer failures and reduced reliability. It’s essential to monitor transformer oil for corrosive sulfur to ensure proper maintenance and prolong the lifespan of the transformer. Regular testing and effective oil filtration and regeneration processes can help mitigate these risks and maintain optimal performance of transformer systems.