What is the oil used for transformers?

The oil used for transformers is known as transformer oil, which serves multiple critical functions. It acts as an insulating medium, preventing electrical discharges between conductive parts, and it also dissipates heat generated during operation. Additionally, transformer oil provides protection against moisture and oxidation, enhancing the longevity and reliability of power transformers. Its chemical stability and high dielectric strength make it an essential component in transformer design and operation.