What are the purification methods for transformer oil?

Purification methods for transformer oil include several techniques to remove impurities and enhance the oil’s dielectric properties. Common methods are filtration, which removes solid particles; vacuum distillation, which separates volatile components; and clay treatment, which adsorbs polar compounds. Additionally, degassing is employed to eliminate dissolved gases. These purification methods for transformer oil ensure optimal performance and longevity of power transformers by maintaining the oil’s insulating and cooling capabilities.