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    • 4. 发明授权
    • System including an indicator responsive to an electret for a power bus
    • 系统包括响应于驻极体用于电力总线的指示器
    • US08791831B2
    • 2014-07-29
    • US13241770
    • 2011-09-23
    • John A. KovacichJohn Trublowski
    • John A. KovacichJohn Trublowski
    • G08B21/00
    • G01R19/155
    • An indicator system for an alternating current power bus includes an electret operatively associated with the alternating current power bus. The electret includes an output having an alternating current voltage when the alternating current power bus is energized. A rectifier includes an input electrically interconnected with the output of the electret and an output having a direct current voltage responsive to the alternating current voltage of the output of the electret. An indicator includes an input electrically interconnected with the output of the rectifier and an indication output responsive to the direct current voltage of the output of the rectifier.
    • 用于交流电源总线的指示器系统包括可操作地与交流电源总线相关联的驻极体。 当交流电力总线通电时,驻极体包括具有交流电压的输出。 整流器包括与驻极体的输出电互连的输入端和具有响应驻极体输出端的交流电压的直流电压的输出端。 指示器包括与整流器的输出电互连的输入端和响应于整流器的输出的直流电压的指示输出。