| 摘要 |
<p>A circuit breaker for rapidly breaking low voltage circuit. The circuit breaker drives with expulsive force to cut off an execution unit rapidly to realize overload and short circuit protection. The circuit breaker includes a plastic casing, a moving contact, a static contact, an explosion chamber, an operating mechanism for breaking and closing the circuit, and a release mechanism for controlling tripping. The circuit breaker further includes an execution unit that can realize rapid breaking and current limiting. The execution unit has a passive part and an active part. When the current passing though the moving contact and the static contact exceeds a predetermined threshold, the expulsive force caused by the current drives the moving contact and the static contact to detach from each other. The detachment action directly drives the passive part and the active part, wherein the action of the active part causes a release lever to release, thereby directly driving the circuit breaker to trip.</p> |
