Invention Grant
US08994544B2 System including an indicator responsive to an electret for a power bus 有权
系统包括响应于驻极体用于电力总线的指示器

System including an indicator responsive to an electret for a power bus
Abstract:
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.
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