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    • 50. 发明授权
    • Combination current sensor and relay
    • 组合电流传感器和继电器
    • US07889473B2
    • 2011-02-15
    • US12383231
    • 2009-03-20
    • Kent J. HolceRoger S. Cota
    • Kent J. HolceRoger S. Cota
    • H02H7/00
    • H02H1/0007G03B27/00G03F7/70358H01H71/125H02H3/08H02H3/087H02H7/005
    • A protection device for monitoring current in a power cable to an electrical device and for controlling a remotely located starter for the electrical device in response to a system controller. The device includes a transformer magnetically linked with the power cable to produce a voltage signal in response to the presence of a changing current within the power cable. An input circuit located in a single housing together with the transformer is electrically connected to the transformer so as to receive the voltage signal. The input circuit produces, in response to the voltage signal, either a first signal or a first circuit condition at the output terminal of the input circuit, representative of the changing current in the power cable. A switch circuit also in the same container with the transformer has a terminal for sensing either a second signal or a second circuit condition of the remotely located system controller. The switch circuit has a second terminal to provide either a third signal or a third circuit condition effective to control the starter, in response to sensing one of the second signal and the second circuit condition. All of the transformer, the input circuit, and the switch circuit are located in a single unitary package which is easily mounted and adjusted to a desired position.
    • 一种保护装置,用于监测电力电缆中的电流到电气设备的电流,并且用于响应于系统控制器来控制用于电气设备的远程起动器。 该装置包括与电力电缆磁连接的变压器,以响应电力电缆内的变化电流的存在产生电压信号。 与变压器一起位于单个壳体中的输入电路电连接到变压器,以便接收电压信号。 输入电路响应于电压信号,在输入电路的输出端产生第一信号或第一电路条件,代表电力电缆中的改变电流。 与变压器同样的容器中的开关电路还具有用于感测位于远程的系统控制器的第二信号或第二电路状态的端子。 开关电路具有响应于感测到第二信号和第二电路状况之一而提供有效控制起动器的第三信号或第三电路条件的第二端子。 所有的变压器,输入电路和开关电路均位于一个单一的整体封装中,易于安装和调整到所需的位置。