| 摘要 |
Provided is an instant trip apparatus of a molded case circuit breaker. The instant trip apparatus of the molded case circuit breaker includes a case (100), a magnet part (200) disposed in the case to generate magnetic attractive force when accident current flows therethrough, an armature (310) disposed to face the magnet part, the armature rotating to the magnet part by the magnetic attractive force, an armature spring (330) for allowing the armature to elastically return to its original position when the magnetic attractive force is removed, and a gap maintenance part (400) restricting the rotation of the armature so that a gap defined between the armature and the magnet part is maintained when the accident current occurs. The gap maintenance part includes a rotation restriction member that is disposed to be exposed to an armature rotation path between the armature and the magnet part. Thus, fusion between the armature and the magnet part due to the accident current occurs may be prevented. |
