Molded breaker case housing molded case circuit breaker
    1.
    发明授权
    Molded breaker case housing molded case circuit breaker 失效
    模制断路器外壳模制外壳断路器

    公开(公告)号:US4156121A

    公开(公告)日:1979-05-22

    申请号:US802620

    申请日:1977-06-02

    摘要: A molded circuit breaker case complete with line and load terminals is fashioned to house a molded case circuit breaker. Rigid conductive straps affixed to the outer case provide electrical connections between the case line and load terminals and the circuit breaker line and load terminals, respectively, and, in addition, serve to secure the circuit breaker in place. The circuit breaker operating handle protrudes through an opening in the outer case to facilitate manual circuit breaker operation.

    摘要翻译: 配有线路和负载端子的模制断路器外壳被设计成容纳塑壳断路器。 固定在外壳上的刚性导电带分别提供了外壳线与负载端子以及断路器线路和负载端子之间的电气连接,另外还用于将断路器固定到位。 断路器操作手柄通过外壳中的开口突出,以便于手动断路器操作。

    Automatic protection device with ground fault annunciation
    2.
    发明授权
    Automatic protection device with ground fault annunciation 有权
    具有接地故障通知功能的自动保护装置

    公开(公告)号:US06473281B1

    公开(公告)日:2002-10-29

    申请号:US09641007

    申请日:2000-08-17

    IPC分类号: H02H316

    摘要: A trip unit, such as one comprising a current sensor generating a current signal indicative of current in a power circuit, an analog to digital converter converting said signal into digital form, and a controller monitoring the current signal and sensing whether an over current condition exists and whether a ground fault condition exists. In case of an over-current condition, the controller causes a trip signal to be output resulting in the power circuit being opened. In the case of a ground fault condition, the controller causes an annunciation output signal but does not generate a trip signal in the case of a ground fault condition and therefore does not cause the power circuit to be opened.

    摘要翻译: 跳闸单元,例如包括产生指示电力电路中的电流的电流信号的电流传感器的转换单元,将所述信号转换为数字形式的模数转换器,以及监控当前信号并检测是否存在过电流状况的控制器 以及是否存在接地故障。 在过电流状态的情况下,控制器导致跳闸信号被输出,导致电源电路断开。 在接地故障情况下,控制器发出通知输出信号,但在接地故障情况下不产生跳闸信号,因此不会使电源电路断开。

    Smoke detector with delayed alarm after change to stand-by power
    3.
    发明授权
    Smoke detector with delayed alarm after change to stand-by power 失效
    烟雾探测器在更换为待机电源后具有延迟报警

    公开(公告)号:US4380760A

    公开(公告)日:1983-04-19

    申请号:US247878

    申请日:1981-03-26

    IPC分类号: G08B17/10 G08B29/18 G08B1/08

    CPC分类号: G08B29/181 G08B17/10

    摘要: The smoke detector is powered by standard AC current and a stand-by power source consisting of rechargeable batteries. A detector is provided for detecting the loss or failure of AC power, and the shift to the stand-by power source. The power loss detector initiates a time delay after which the smoke detector signal alarm is energized to alert the user about the loss of AC power. If AC power is restored before the time delay interval, the signal is not energized since the user need not be alerted. If the alarm is energized to alert the user of a loss of AC power, a manual reset switch may be used to terminate the alarm. If the manual reset switch is not used, the alarm is terminated automatically upon the restoration of AC power.

    摘要翻译: 烟雾探测器由标准交流电源供电,并由备用电池组成的备用电源。 提供检测器,用于检测交流电源的损耗或故障,并转移到备用电源。 功率损失检测器启动时间延迟,之后烟雾探测器信号报警器通电,以向用户通知交流电源的损失。 如果交流电源在延时间隔之前恢复,则信号不通电,因为用户不需要提醒。 如果报警器通电以提醒用户交流电源的损失,可以使用手动复位开关来终止报警。 如果不使用手动复位开关,则恢复交流电后报警自动终止。

    Circuit breaker demonstrator and distribution circuit protection
coordinator apparatus
    4.
    发明授权
    Circuit breaker demonstrator and distribution circuit protection coordinator apparatus 失效
    断路器示波器和配电电路保护协调器

    公开(公告)号:US4245318A

    公开(公告)日:1981-01-13

    申请号:US36936

    申请日:1979-05-07

    IPC分类号: G01R31/327 H02H7/30 G06G7/62

    摘要: Demonstrator apparatus utilizes a display to portray in log-log coordinate scale the trip-time curve of a solid state (static) trip circuit breaker. A simulated static trip unit programmer is selectively adjustable to vary the shape and position of the displayed trip-time curve. An overlay bearing the trip time-current curve for a prospective upstream or downstream circuit protective device is superimposed on the display and the programmer adjusted to demonstrate selective trip coordination. Alternatively, a pair of simulated trip unit programmers are connected to the display to jointly portray thereon a pair of trip-time curves. Also disclosed is the utilization of a computer to generate on a display plural time-current response curves of a series of circuit protective devices selected on the basis of specific distribution system parameters to provide requisite system protection and response coordination.

    摘要翻译: 演示装置利用显示器以对数对数坐标方式描绘固态(静态)跳闸断路器的跳闸 - 时间曲线。 模拟静态跳闸单元编程器可选择性地调节,以改变显示的跳闸时间曲线的形状和位置。 将预期的上游或下游电路保护装置的跳闸时间曲线的覆盖层叠加在显示器上,并且编程器被调整以证明选择性跳闸协调。 或者,一对模拟跳闸单元编程器连接到显示器以在其上共同描绘一对跳闸时间曲线。 还公开了利用计算机在显示器上生成基于特定分配系统参数选择的一系列电路保护装置的多个时间电流响应曲线,以提供必要的系统保护和响应协调。