| 摘要 |
Magnetic actuator unit for a circuit-breaker arrangement comprising an armature (6) arranged to be movable between a first and second end position for an closed and opened switching position respectively of the circuit-breaker, a single electrical coil (7) for moving the armature (6) to the second position due to electrical current feed, a permanent magnet (8) for additionally loading the armature (6) in the direction of the second position, an outer ferromagnetic yoke (9) at least partly surrounding the single electrical coil (7) and the ferromagnetic core (10) for directing the magnetic flux to the movable ferromagnetic armature (6), an opening spring means for permanent loading the armature (6) in the direction of the first position, which is coaxially arranged between said armature (6) and the front side of the electrical coil (7), wherein the opening spring means are at least partly accommodated inside a groove (12) formed in the disk-shaped armature (6) whose dimension corresponds to the outer shape of the ferromagnetic yoke (9). |
