Switch with current flow detector

Details Switch with current flow detector Switch with current flow detector

G - Physics

01

R

G01R 21/00 (2006.01) G01R 19/155 (2006.01) H01H 9/16 (2006.01) H02J 3/00 (2006.01)

Patent

CA 2216263

A switch for use in an AC circuit wired in a three-way switch mode for supplying power to a load, has a first terminal for-connection to an external line, second and third terminals for connection respectively to corresponding terminals of a second like switch, and a switch contact for selectively connecting the first terminal to either one of the second and third terminals. A transformer has its primary winding connected between the first terminal and the external line, and its secondary winding deriving an output voltage therefrom. The output voltage is rectified and supplied to a light-emitting diode. The ratio of turns of the windings of the transformer is such that the rectified voltage energizes the light-emitting diode when power is supplied to the load over its normal operating range. The light-emitting diode will thus provide an indication of when power is supplied to the load.

Cette invention concerne un interrupteur trois voies de circuit d'alimentation en courant alternatif comportant une première borne raccordée au secteur, une seconde et une troisième bornes connectées aux bornes correspondantes d'un deuxième interrupteur trois voies et un contact permettant de connecter la première borne à l'une ou l'autre des seconde et troisième bornes. L'enroulement primaire d'un transformateur est connecté à la première borne et au secteur, l'enroulement secondaire dérivant une tension de sortie. Cette tension est redressée et relayée à une diode électroluminescente. Le rapport d'enroulement du transformateur est tel que la tension redressée correspond à valeur voulue pour allumer la diode lorsque la charge est alimentée à l'intérieur de sa plage de fonctionnement normal. Dans ces conditions, la diode électroluminescente indique que la charge est alimentée.

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