What are the technical considerations for oil used in transformers?

The technical considerations for oil used in transformers include its dielectric strength, thermal conductivity, and viscosity. The oil must have high dielectric strength to prevent electrical breakdown, adequate thermal conductivity for efficient heat dissipation, and appropriate viscosity to ensure proper circulation within the transformer. Additionally, the oil should be chemically stable, resistant to oxidation, and have low moisture content to maintain performance and prolong the lifespan of the transformer.