What are the technical aspects of transformer oil manufacturing?

The technical aspects of transformer oil manufacturing involve the refining of base oils, typically mineral oils, through processes such as distillation, hydrotreating, and de-waxing to remove impurities and enhance thermal stability. Additives are incorporated to improve oxidation resistance, dielectric strength, and fluidity at low temperatures. Quality control measures, including testing for moisture content, acidity, and flash point, ensure compliance with industry standards, such as ASTM D3487, for optimal performance in power transformers.