| 摘要 |
A circuit breaker of this application includes a fixable contact, a movable contact, a switchgear unit, a handle, a trip unit and an arc chamber unit, the circuit breaker being connected with a main circuit to cause a current to flow and the trip unit includes a fixed magnet being fixed on the main circuit, the fixed magnet configured to generate an electromagnetic force when the main circuit generates an abnormal current; an armature configured to be in contact with the fixed magnet in a rotation, one side thereof being spaced apart from the fixed magnet with a fixed interval and another side thereof forming a stepped slope; and an instant bar being in contact with the stepped slope of the armature, the instant bar performing a left and right rectilinear motion for adjusting the interval between the fixed magnet and the armature to rotate the armature. Therefore, this application has an effect where with an armature having a stepped slope with an inclination angle and an instant bar performing a left and right rectilinear motion to rotate the armature, an interval between a fixed magnet and an armature is adjusted and an abnormal current value triggering a trip is set. |
