Method and ballast for feeding a uv light low pressure radiator

H - Electricity – 05 – B

Patent

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Details

H05B 41/00 (2006.01) H05B 41/24 (2006.01) H05B 41/285 (2006.01)

Patent

CA 2372482

The invention relates to a method and a ballast for feeding a UV light low pressure radiator. The UV light low pressure radiator is ignited and subsequently fed with direct current. The polarity of the direct current is changed at successive intervals which are greater than half the period of conventional network frequency and smaller than a time until a lower threshold value for the operational temperature of the electrodes is reached, whereby said time is a result of the thermal time constant of the UV light low pressure radiator.

La présente invention concerne un procédé et un ballaste servant à alimenter un émetteur de rayonnement U.V. basse pression. Après allumage de l'émetteur de rayonnement U.V. basse pression, celui-ci est alimenté en courant continu et la polarité du courant continu est modifiée à des intervalles de temps successifs ayant une durée supérieure à la demi-période de la fréquence réseau usuelle, mais inférieure à un temps calculé à partir de la constante de temps thermique de l'émetteur de rayonnement U.V. basse pression, jusqu'à ce qu'une valeur inférieure soit atteinte pour la température de fonctionnement des électrodes.

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