Circuit status indicator having liquid crystal display

Details Circuit status indicator having liquid crystal display Circuit status indicator having liquid crystal display

G - Physics

01

R

324/58

G01R 1/02 (2006.01) G01R 19/155 (2006.01) G01R 31/02 (2006.01)

Patent

CA 2024243

An indicator for instantaneously indicating the presence of voltage on a monitored electrical conductor of an AC power distribution system utilizes a high impedance liquid crystal display component providing an "N" display in response to an applied signal. The "N" segment display electrode and associated backplane display electrode are capacitively coupled to the monitored conductor and system ground to provide an "N" display when voltage is present on the conductor.

Cette invention concerne un détecteur de tension à action instantanée pour le contrôle d'un conducteur d'un réseau de distribution en CA, détecteur qui fait appel à un afficheur à cristaux liquide à haute impédence affichant un "N" à la réception d'un signal. L'électrode du segment "N" de l'afficheur et l'électrode du panneau arrière y associé sont couplés par liaison capacitive au conducteur surveillé et à la masse du réseau pour afficher un "N" lorsque ledit conducteur est sous tension.

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