Solid state relay

H - Electricity – 03 – K

Patent

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Details

H03K 17/56 (2006.01) G01R 19/165 (2006.01) H01H 47/00 (2006.01) H03K 17/79 (2006.01)

Patent

CA 2106233

A solid state relay with a control terminal and a current controlled or voltage controlled solid state power switching device, which according to a signal at the control terminal is turned on or off, wherein the relay includes a first sensor sensing the control current or voltage, a second sensor sensing a voltage across the switching device, and a comparator to compare the sensor outputs and generate an alarm signal in response to an abnormal condition. The sensors include optically or magnetically coupled switching devices, and the comparator also receives the control signal.

Relais à semiconducteur avec un terminal de commande et un dispositif de commutation à semiconducteur commandé en courant ou en tension qui, selon un signal du terminal de commande, est mis en circuit ou hors circuit. Le relais inclut un premier détecteur détectant le courant ou la tension de commande, un deuxième détecteur détectant une tension à travers l'interrupteur, et un comparateur pour comparer les données de sortie du détecteur et générer un signal d'alarme en réponse à une condition anormale. Les détecteurs comprennent des dispositifs de commutation à commande optique ou magnétique, et le comparateur reçoit aussi le signal de commande.

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