What is the component of transformer oil in power transformers?

The component of transformer oil in power transformers primarily consists of highly refined mineral oils, which are derived from petroleum. These oils are formulated to have excellent dielectric properties, thermal stability, and low viscosity. Additionally, transformer oil may contain additives such as antioxidants, corrosion inhibitors, and pour point depressants to enhance performance and longevity, ensuring effective insulation and cooling in power transformers.