What is the transformer oil processing procedure used in power transformers?

The transformer oil processing procedure used in power transformers involves several key steps. Initially, the oil is filtered to remove particulate contaminants. Next, it undergoes degasification to eliminate dissolved gases, which can affect insulation properties. The oil is then subjected to vacuum treatment to remove moisture, enhancing its dielectric strength. Finally, the processed transformer oil is tested for quality assurance before being reintroduced into the power transformer system.