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2. 发明授权

US4006439A Circuit interrupter having an insulated bridging contact 失效
标题翻译：具有绝缘桥接触点的断路器
公开(公告)号：US4006439A
公开(公告)日：1977-02-01
申请号：US612608
申请日：1975-09-11
申请人： Raymond E. Wien , Eugene H. Seidling , Nicholas A. Tomasic
发明人： Raymond E. Wien , Eugene H. Seidling , Nicholas A. Tomasic
IPC分类号： H01H3/46 , H01H71/10 , H01H73/04 , H01H83/00
CPC分类号： H01H73/045
摘要： A circuit interrupter particularly suitable for use in an oil filled distribution transformer having an elongated contact arm pivotable about one end with a movable contact attached to the other end through suitable insulating members to electrically isolate the movable contact from the elongated contact arm. The movable contact is a bridging contact for completing a series circuit through two stationary contacts. The movable bridging contact is spring biased away from the elongated contact arm. A retainer restricts the movement of the bridging contact away from the insulating members attached to the elongated contact arm. The biasing spring is disposed between the insulating members and the retainer. Grooves formed in the sides of the insulating members restrict rotational movement of the retainer and bridging contact. For larger circuit interrupters, a bridging contact assembly can be utilized having a plurality of parallel bridging contacts and a plurality of biasing springs. The elongated contact arm is biased towards an open position when the bridging contact is separate from the stationary contacts, but with the circuit interrupter in the normally closed position is held in a closed position wherein the bridging contact is in engagement with the stationary contact. A latching mechanism which is responsive to a bimetal or magnetic trip to allow the circuit breaker to trip open during overload conditions, holds the elongated contact arm in the closed position.
摘要翻译：一种特别适合用于装油配电变压器的电路断路器，其具有可绕一端枢转的细长接触臂，可动接触件通过适当的绝缘构件连接到另一端，以将活动接触件与细长接触臂电隔离。可移动触点是用于通过两个固定触点完成串联电路的桥接触点。可移动桥接触头被弹簧偏压远离细长接触臂。保持器限制桥接接触件远离附接到细长接触臂的绝缘构件的移动。偏置弹簧设置在绝缘构件和保持器之间。在绝缘构件的侧面形成的沟槽限制保持器的旋转运动和桥接接触。对于较大的电路断路器，可以使用具有多个平行桥接触点和多个偏置弹簧的桥接触头组件。当桥接触头与固定触点分开时，细长的接触臂被偏置到打开位置，而处于常闭位置的电路断路器保持在关闭位置，其中桥接触头与固定触点接合。响应于双金属或磁性跳闸以允许断路器在过载状态下跳闸打开的闭锁机构将细长接触臂保持在关闭位置。

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