Three phase overload protection systems for high voltage transformers or distribution stations (formed by a relay and a transformer). With a sequence of trip impulses the supply system is cut off by an electrical cut out switch.

These impulses are generated by a relay when an overload persists over a certain period.

The protection grade (IP67) of the relay and resin casing for the transformers make them able to operate in adverse conditions.

Three phase overload protection relays for high voltage distribution stations.

Current control relays

Harmonic relays

Three phase current relays

Three phase voltage relays