What is the process of oil filtration for transformers?

The process of oil filtration for transformers involves removing impurities and moisture from transformer oil to enhance its dielectric strength and longevity. This typically includes pre-filtration to remove larger particles, followed by vacuum dehydration and fine filtration to eliminate water and smaller contaminants. The filtered oil is then tested for quality parameters before being reintroduced into the transformer, ensuring optimal performance and reliability of the power transformer.