What is transformer oil used for in power transformers?

Transformer oil is used for several critical functions in power transformers. Primarily, it serves as an insulating medium, preventing electrical discharges between conductive parts. Additionally, transformer oil facilitates heat dissipation, absorbing and transferring heat generated during operation to maintain optimal temperature levels. It also protects internal components from moisture and oxidation, thereby enhancing the longevity and reliability of power transformers.