| 摘要 |
A circuit breaker with a thermal and magnetic tripping mechanism for releasing the separable contacts of the circuit breaker in response to overload currents. The tripping mechanism comprising a trip bar responsive indirectly to the overload current for releasing a trip lever which in turn releases a latch lever. The latch lever and trip lever being pivoted on spaced pivot points and the trip lever having a roller mounted thereon for retaining the latch lever in the latched position and for rolling out of engagement with the latch lever when the trip lever is released, whereby shorter levers and less force are required to actuate the mechanism. |
