How is purification of transformer oil performed?

Purification of transformer oil is performed through a series of processes, including filtration, dehydration, and degasification. Initially, the oil is filtered to remove solid contaminants. Next, dehydration is achieved using vacuum or heat methods to eliminate moisture. Finally, degasification removes dissolved gases, enhancing the oil’s dielectric strength. These steps ensure the transformer oil meets required specifications for optimal performance and longevity of the power transformer.