France Transfo proposes different technologies for its oil-immersed distribution transformers

Standard technology: the technology « Hermetically sealed type transformer with integral filling », This technology was developed with EDF in the 1970s, and has become an international standard.
- There is also the technology « Breathing type transformer with conservator », This is most often used for transformers with a power greater than 20 MVA

For public distribution networks, France Transfo has developed a transformer with protection by cut-off for powers up to 630kVA

Since 2006, France Transfo proposes a transformer immersed in vegetable oil, of the Ester Naturel type: the new Vegeta series