Motorized operating mechanism for SENTRON 3VA breakers
The Siemens 3VA9467-0HA22 is a motorized operating mechanism (MO) accessory for the SENTRON 3VA molded-case circuit breaker family, specifically optimized for long cable runs. It provides remote electrical switching of the breaker — opening and closing the main contacts without an operator at the panel. The mechanism is designed for 3VA1 breakers in the 400 A and 630 A frame sizes, as well as 3VA2 breakers in the same frame sizes. The mechanism's make time is 1.7 s typical, and its break time is 1.3 s typical — meaning the breaker closes in under two seconds and opens in under 1.5 seconds from the control signal. This timing matters for coordination in motor-starting or emergency-stop sequences where the breaker must respond faster than upstream protective devices.
Panel integration and environmental range
The mechanism measures 138 mm wide by 92 mm high by 149 mm deep, which fits the standard mounting footprint of the 3VA1 and 3VA2 breaker frames. It mounts directly onto the breaker in the panel, so no additional DIN-rail space is consumed — the assembly occupies the same panel cutout as the breaker itself.