| 摘要 |
A tripping unit of a molded shell and tube circuit breaker can comprise the following components: a magnetic core which is configured for generating a magnetic force when electric power is applied; an armature which is rotatably equipped at one side of the magnetic core; and an armature spring which is constructed for applying an elastic force in a movement direction of the armature for separating from the magnetic core, so as to restrain increase of a torque which is applied on the armature when the armature is sucked through the magnetic core. Therefore, when the sucking force of the magnetic core increases gradually, instant tripping operation can be performed effectively. |
