
There are three types of parameters or properties in transformer oil. They are electrical parameters, chemical parameters, and physical parameters. Dielectric strength, specific resistance, and dissipation factor are the electrical parameters. Wanter content in acid and acidity in transformer oil are included in the chemical parameters. And interfacial tension, viscosity are the physical parameters of transformer oil. http://www.powerlinkoil.com/properties-of-transformer-insulating-oil/