What are the technical considerations for oil used for transformer?

The technical considerations for oil used for transformers include its dielectric strength, thermal conductivity, viscosity, and chemical stability. The oil must have a high dielectric strength to prevent electrical breakdown, effective thermal conductivity for heat dissipation, and appropriate viscosity for efficient circulation. Additionally, it should be chemically stable to resist oxidation and degradation over time, ensuring long-term performance and reliability of the transformer. Regular testing for these properties is essential for maintenance.