Why is oil used in transformers?

Oil is used in transformers primarily for insulation and cooling purposes. The oil provides electrical insulation between conductive components, preventing short circuits. Additionally, it efficiently dissipates heat generated during operation, maintaining optimal temperature levels. Transformer oil also helps to prevent oxidation and corrosion of internal parts, enhancing the longevity and reliability of the transformer. Overall, oil is essential for the safe and effective operation of power transformers.