| 摘要 |
A circuit breaker electromagnetic tripping device in which the contact between the movable contacts and the stationary contacts is stable and well, and the tripping does not tend to fail is disclosed. In one embodiment, the circuit breaker device comprises a casing, a tripping armature and a tripping armature spring which are disposed transversely within the casing, and a tripping coil fitted over the casing corresponding to tripping armature. The device also includes a moveable support which is disposed longitudinally within the casing and moveable inside the casing and a lower end of the moveable support can be engaged with or disengaged from a front end of the tripping armature, and an attracting armature and an attracting armature spring which are disposed longitudinally at a center of the moveable support. The circuit breaker device further includes an attracting coil which is fitted over the casing at a position corresponding the attracting armature and a longitudinal central axis of the attracting coil is consistent with that of the moveable support and a plurality of moveable contact assemblies which are disposed at two sides of the moveable support.
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