Electrical switching device

摘要

The electromagnetic actuator (1) for a switch has a coil (3) surrounding an armature (6) and a fixed core (5). A rod (7) attached to the armature extends through a bore (15) in the fixed core and may be urged away from its actuated position by a coil spring. The fixed core is mounted on a yoke (4) fastened to a clamp (2) and there are contacts (9,10) for supplying current to the coil.