Safety function ARMS, high level of protection for maintenance personnel

Our circuit-breakers are optionally available with the new and patented ARMS System (Arcflash Reduction Maintenance System™). In the event of an arc fault, the trip unit breaks instantaneously and quickly.

Breaking is even faster than that of a non-delayed short-circuit trip. This function can be activated directly on the circuit-breaker or by an external switch, e.g. when maintenance staff enter a danger zone. A special wiring configuration is not required.