Annunciator apparatus for monitoring electrical connections
作者： Abraham Zeder
DOI:
关键词:
摘要: An annunciator for indicating the removal of an electrical plug from receptacle. The receptacle includes neutral switching contacts actuated in response to insertion a into input circuit apparatus monitors state and couples signals produced when is removed latching thereby produce audible or indication removal. Circuit are electrically isolated, detects any attempts disconnect external power supply remove internal battery.
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