What are the technical aspects of transformer oil in transformer?

Transformer oil serves several critical technical functions in power transformers. It acts as an insulator, preventing electrical discharges, and as a coolant, dissipating heat generated during operation. The oil also protects internal components from oxidation and moisture, enhancing the transformer’s lifespan. Key properties include high dielectric strength, low viscosity for efficient heat transfer, and a high flash point for safety. Regular testing for acidity, moisture content, and dielectric strength is essential for maintaining oil performance.