What is transformer oil used for in power transformers?

Transformer oil is used for in power transformers primarily as an insulating and cooling medium. It provides electrical insulation between live components and helps dissipate heat generated during operation. The oil’s high dielectric strength prevents electrical breakdown, while its thermal conductivity aids in maintaining optimal operating temperatures, ensuring the reliability and efficiency of the power transformer. Additionally, transformer oil protects against moisture and oxidation, prolonging the equipment’s lifespan.