Our Buchholz relays are characterized by a rugged design, formed from the experiences of more than 100 years of measuring, control and safety technology.

The Buchholz relay takes on the function of a central protective device for fluid-filled transformers and reactors with an expansion tank. Installed in the pipeline between the tank and expansion tank, it responds to errors that occur inside the transformer being protected. Damage can be detected by the Buchholz relay early, thus preventing destruction.