公开(公告)号：USD442146S1

公开(公告)日：2001-05-15

申请号：US29120367

申请日：2000-03-17

申请人： Randy Greenberg ,  Roger Castonguay ,  Dave Christensen ,  Hassan Girish ,  Ranganna C. Dasari ,  Dean A. Robarge ,  Dennis J. Doughty ,  Michael H. Thomas

设计人： Randy Greenberg ,  Roger Castonguay ,  Dave Christensen ,  Hassan Girish ,  Ranganna C. Dasari ,  Dean A. Robarge ,  Dennis J. Doughty ,  Michael H. Thomas

公开(公告)号：US06222433B1

公开(公告)日：2001-04-24

申请号：US09630229

申请日：2000-08-01

申请人： Bhaskar T. Ramakrishnan ,  Roger Castonguay

发明人： Bhaskar T. Ramakrishnan ,  Roger Castonguay

IPC分类号： H01H7700

CPC分类号： H01H1/2058 ,  H01H71/04 ,  H01H71/40 ,  H01H71/505 ,  H01H2071/042

摘要： A thermal-magnetic trip unit, suitable for use in a circuit breaker, for eliminating the requirement for latching surfaces while still providing the additional force and motion required to trip the breaker during a short circuit or an overcurrent trip event. The trip unit comprises a link that is biased based on the position of a trip bar. A spring biases the link in a first direction when the trip unit is in a reset condition and biases the link in a second direction when the trip bar is rotated about a pivot point. A trip unit further including an improved indication-of-trip system comprising a two-piece trip bar mechanism and flag system is described to discriminate between overcurrent and short circuit faults. In this embodiment of the invention, visual confirmation of the cause of the trip is provided. The case of the circuit breaker includes a window disposed therein in a location conducive to a user viewing an identification flag thus enabling the rapid determination of the type of trip which has occurred. To identify a trip caused by an overcurrent condition, a first flag is employed. To identify a trip caused by a short circuit condition, a second flag is employed. If an overcurrent event occurs then the first slide of the two piece trip bar mechanism moves to expose the first flag. If a short circuit event occurs, only the second slide of the two-piece trip bar system moves to expose the second flag.

摘要翻译： 一种适用于断路器的热磁脱扣单元，用于消除锁定表面的要求，同时仍然提供在短路或过电流跳闸事件期间使断路器跳闸所需的附加力和运动。 跳闸单元包括基于跳闸杆的位置偏置的连杆。 当跳闸单元处于复位状态时，弹簧在第一方向上偏压连杆，并且当跳闸杆围绕枢轴点旋转时，弹簧在第二方向上偏压连杆。 描述了进一步包括包括两件式跳闸杆机构和标志系统的改进的跳闸指示系统的跳闸单元，以区分过电流和短路故障。 在本发明的该实施例中，提供了旅行原因的视觉确认。 断路器的情况包括在有利于用户观看识别标志的位置处设置的窗口，从而能够快速确定已经发生的行程类型。 为了识别由过电流条件引起的跳闸，采用第一标志。 为了识别由短路状况引起的跳闸，采用第二标志。 如果发生过电流事件，则两片跳闸杆机构的第一滑动移动以露出第一标志。 如果发生短路事件，只有两件式脱扣器系统的第二个滑块移动才能露出第二个标志。