What is the transformer oil production process used in power transformers?

The transformer oil production process used in power transformers involves several key steps. First, crude oil undergoes distillation to separate lighter fractions. Next, the distillate is subjected to refining processes, including hydrotreating and decolorization, to remove impurities and enhance electrical properties. Finally, the refined transformer oil is tested for quality assurance before being packaged for use in power transformers, ensuring it meets industry standards for insulation and cooling.