Apparatus for detecting luminous tube and power supply...

H - Electricity – 05 – B

Patent

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H05B 41/02 (2006.01) H05B 41/285 (2006.01)

Patent

CA 2215099

Apparatus for detecting series arcs and output load faults in high frequency luminous tube power supplies and ballasts including wideband ringing and detector means for collecting the intense high frequency, pre-plasma noise energy associated with the initial avalanche phase of high frequency arc formation and transient suppression means for delaying the triggering of power supply shut-down for up to the duration of the arc avalanche phase. Plural detectors for increased sensitivity and reliability over a variety of arc locations may be employed. Dual purpose detector input probes serve as over-voltage corona generators.

Détecteur de défauts d'arcs en série et de charge de sortie, y compris d'oscillations parasites en large bande dans les dispositifs d'alimentation et les ballasts de tubes lumineux haute fréquence, et dispositif de détection permettant de capter l'intense énergie de bruit préplasmatique à haute fréquence correspondant à la phase d'avalanche initiale de la formation d'arc à haute fréquence. L'appareil comprend également un suppresseur de tension transitoire permettant de retarder l'interruption de l'alimentation pendant une période pouvant se prolonger à toute la durée de la phase d'avalanche. On peut utiliser plusieurs détecteurs à différents emplacements de formation d'arcs pour accroître la sensibilité et la fiabilité. Des sondes détectrices à double usage servent à générer des effluves de surtension.

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