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    • 7. 发明授权
    • Input circuit for current transformer
    • 电流互感器输入电路
    • US09588148B2
    • 2017-03-07
    • US14602986
    • 2015-01-22
    • Veris Industries, LLC
    • Martin CookDavid PiersonMichael L. Johnson
    • G01R15/18H02M1/00H02J1/00G01R1/00
    • G01R15/183G01R1/00H02J1/00H02M1/00
    • A transformer for monitoring current in a power cable is magnetically linked with the power cable connected to the electrical device, where the transformer produces a changing transformer signal in response to the presence of a changing current within the power cable. An input circuit located proximate to the transformer and having an output terminal and being electrically connected to the transformer so as to receive the changing transformer signal. The input circuit produces, in response to receiving the changing transformer signal, one of a first signal representative of the changing current, and a first circuit condition at the output terminal of the input circuit representative of the changing current in the power cable. The input circuit includes an impedance set having an effective impedance that comprises a plurality of elements, wherein at least one of the elements is not electrically connected to the remaining the plurality of elements.
    • 用于监测电力电缆中的电流的变压器与连接到电气设备的电力电缆磁连接,其中变压器响应于在电力电缆内存在变化的电流而产生变化的变换器信号。 一个输入电路,位于变压器附近,具有一个输出端子,并与变压器电连接,以便接收变化的变压器信号。 输入电路响应于接收到变化的变压器信号而产生代表变化电流的第一信号中的一个,以及代表电力电缆中改变电流的输入电路的输出端的第一电路状态。 输入电路包括具有包括多个元件的有效阻抗的阻抗集,其中至少一个元件不与剩余的多个元件电连接。