How is transformer oil used in power transformers?

Transformer oil is used in power transformers primarily for insulation and cooling. It provides electrical insulation between live components and the transformer casing, preventing short circuits. Additionally, transformer oil dissipates heat generated during operation, maintaining optimal temperature levels. The oil also serves as a medium for the removal of moisture and contaminants, ensuring the longevity and reliability of the transformer. Regular testing of the oil’s properties is essential for effective maintenance.