What is the transformer oil purification procedure?

The transformer oil purification procedure involves several steps to remove impurities and enhance the oil’s dielectric strength. Initially, the oil is filtered to eliminate solid particles. Next, it undergoes degasification to remove dissolved gases. The oil is then subjected to vacuum treatment to further reduce moisture content. Finally, the purified transformer oil is tested for quality assurance before being reintroduced into the power transformer, ensuring optimal performance and longevity.