What are the properties and applications of Voltesso 35 transformer oil?

Voltesso 35 is typically described as a mineral insulating oil formulated for transformer insulation and cooling, with controlled viscosity suited for heat transfer and acceptable dielectric properties when delivered and maintained properly. Applications include distribution and power transformers and related oil filled equipment. Actual properties and approvals depend on the datasheet and region. Utilities usually confirm compliance through batch certificates and baseline lab acceptance tests before use.