What is the process of transformer oil processing in power transformers?

The process of transformer oil processing in power transformers involves several key steps. Initially, crude oil is refined to remove impurities and moisture. The oil is then treated with additives to enhance its dielectric properties and thermal stability. Filtration and degassing processes are employed to eliminate dissolved gases and particulate matter. Finally, the processed transformer oil is tested for quality assurance before being filled into power transformers to ensure optimal performance and longevity.