Tesar company was established in 1979 and it was the first Italian company to implement the technology for the production of Cast Resin Transformers. With 40 years' experience in design and manufacturing, Tesar is today able to provide to its clients Medium Voltage Cast Resin Transformers with rated power up to 25 MVA and primary voltage up to 36 kV.

Nowadays, having become part of R&S Group, Tesar is one of the worldwide leading Companies with high research and technology innovation standards.

More than 100,000 Tesar transformers have already been successfully installed in the five continents of the World.

With high-end electrical products and innovative solutions, we are a trusted partner to our customers having our processes ISO 9001, ISO 14001 and ISO 45001 certified.

Tesar is proud to claim fully approved CESI Laboratory and an impressive portfolio of routine, type and special tests.