ABB Vacuum Circuit Breaker Type VM1

The VM1 circuit-breakers use vacuum interrupters embedded in the poles. The embedded interrupters are particularly sturdy and protect the interrupters against shocks, accumulation of dust, and humidity. Each interrupter houses the contacts and makes up the interrupting chamber.
Actuation of the interrupter contacts is carried out by a single magnetic actuator controlled by position sensors and by an electronic module. The energy required for operation is provided by capacitors which ensure an adequate store ofenergy.

Technical Specification: