What are the technical aspects of types of transformer oils?

The technical aspects of types of transformer oils include their chemical composition, dielectric strength, thermal conductivity, and viscosity. Mineral oils, commonly used, offer good insulation and cooling properties but have lower fire resistance. Synthetic esters provide higher fire safety and biodegradability, while natural esters offer excellent cooling and environmental benefits. Additionally, the oxidation stability and moisture absorption characteristics are critical for maintaining transformer performance and longevity.