| 摘要 |
<p>The present invention relates to a trip-free switching mechanism for actuating double contact arrangement of a circuit breaker, comprising: an actuator assembly is composed of a hook member, a trip bar member and a movable contact holder pivotably attached to a plate member, where the movable contact holder formed of an extended arm with a linear slot. A carrier assembly is composed of a carrier member movably held and guided within the linear slot in the movable contact holder; and a movable contact hinged at the carrier member. The carrier member is placed between the fixed contacts and the arc chambers in such a way that the movable contact is being located and facing towards to the fixed contacts. The carrier assembly is operatively connected to the actuator assembly in such a way that while operating the toggle switch, the movable contact holder is actuated through the plate member for linear movement of the carrier member to make electrical contact between the fixed contacts through the movable contact. Thus, the trip-free switching mechanism achieves better isolation between the fixed and movable contacts independent of latching and toggle movement, which enhances breaking performance of the circuit breaker. FIG.l</p> |
