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    • 8. 发明授权
    • Method for selectively triggering circuit breakers in the event of a short circuit
    • 在短路情况下有选择地触发断路器的方法
    • US08503142B2
    • 2013-08-06
    • US13000897
    • 2009-06-26
    • Joerg MeyerPeter Schegner
    • Joerg MeyerPeter Schegner
    • H02H7/26
    • H02H7/30
    • A method is disclosed for selectively triggering circuit breakers in the event of a short circuit, wherein an upstream circuit breaker and at least one downstream circuit breaker on the output side are provided. In at least one embodiment, the upstream circuit breaker monitors as to whether the or one of the downstream circuit breakers is already in the process of opening the switch contacts thereof to interrupt the circuit on the output side, while forming a switch arc. In order to reliably determine whether a downstream circuit breaker is already in the process of opening, according to at least one embodiment of the invention the upstream circuit breaker, so as to detect a switch arc on the output side, checks whether the ohmic resistance of the short circuit loop produced by a short circuit has an exponential curve over time in that an exponent is continually computed and based on the computer exponent the switch arc is determined if the computed exponent exceeds a threshold.
    • 公开了一种在短路的情况下选择性地触发断路器的方法,其中提供了上游断路器和输出侧的至少一个下游断路器。 在至少一个实施例中,上游断路器监视下游断路器中的一个或其中之一是否已经在打开开关触点的过程中中断输出侧的电路,同时形成开关电弧。 为了可靠地确定下游断路器是否已经处于打开过程中,根据本发明的至少一个实施例,上游断路器以检测输出侧的开关电弧,检查是否有欧姆电阻 由短路产生的短路回路具有随时间的指数曲线,因为连续计算指数,并且基于计算机指数,如果计算出的指数超过阈值,则确定开关弧。