What is the role of a passivator in transformer oil?

The role of a passivator in transformer oil is to enhance the oil’s stability and protect it from oxidation and degradation. Passivators form a protective layer on metal surfaces within the transformer, preventing corrosion and extending the lifespan of the insulating oil. By inhibiting the formation of harmful byproducts during operation, passivators help maintain the electrical properties and overall performance of the transformer, ensuring reliable operation over time.