| 摘要 |
<p>A circuit breaker comprises a fixed contact (17), a movable contact (18), resilient means (39) operable to urge the movable contact (18) away from the fixed contact (17), a manually operable lever (12) for moving the movable contact into and out of engagement with the fixed contact, a linkage (32-34) for transmitting movement of said lever (12) to said movable contact and for holding said movable contact in engagement with said fixed contact in an "ON" position of said lever, releasable latch means (35, 37) coupling the linkage (32-34) and the movable contact (18), and fault detection means (46 or 48) for releasing said latch means (35, 37) and so disengaging said moving contact (18) from said linkage (32-34) for movement under the action of said resilient means (39) independently of movement of said linkage (32-34) and said lever (12).</p> |
