System including an indicator responsive to an electret for a power bus

摘要

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.

主权项

1. An indicator system for an alternating current power bus, said indicator system comprising:
an electret operatively associated with said alternating current power bus, said electret comprising an output having an alternating current voltage when said alternating current power bus is energized with a power bus alternating current voltage; and an indicator comprising: (i) an input wired to the output of said electret such that said input is physically electrically interconnected with the output of said electret, and (ii) an indication output responsive to the alternating current voltage of the output of said electret, wherein the indicator is driven directly by said alternating current voltage of the output of said electret and driven indirectly but not directly by said power bus alternating current voltage.