What are the manufacturers of EHV grade transformer oil?

Manufacturers of EHV grade transformer oil include major companies such as Nynas, Petro-Canada, and Shell. These manufacturers produce EHV grade transformer oil that meets stringent specifications for electrical insulation and thermal conductivity, essential for the efficient operation of extra-high voltage (EHV) power transformers. Their products are designed to ensure reliability and longevity in high-stress electrical environments.