What is the purpose of transformer oil in power transformers?

The purpose of transformer oil in power transformers is to provide electrical insulation and cooling. It serves as a dielectric medium, preventing electrical discharges between conductive parts, while also dissipating heat generated during operation. Additionally, transformer oil helps to protect internal components from moisture and oxidation, thereby enhancing the overall reliability and longevity of the transformer. Proper maintenance of transformer oil quality is essential for optimal performance.