What are the technical considerations for oil used in electric transformer?

The technical considerations for oil used in electric transformers include its dielectric strength, thermal conductivity, viscosity, and chemical stability. The oil must have high dielectric strength to prevent electrical breakdown, excellent thermal conductivity for efficient heat dissipation, and appropriate viscosity for optimal circulation. Additionally, it should resist oxidation and degradation over time to ensure long-term performance and reliability of the transformer. Regular testing for moisture and contaminants is also crucial for maintaining oil quality.