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

When selecting oil for transformers, key technical considerations include dielectric strength, thermal conductivity, viscosity, and flash point. 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, the flash point should be sufficiently high to minimize fire risk. Commonly used oils include mineral oil and ester-based fluids, each with distinct properties suited for specific applications.