Method and arrangement for triggering a series spark gap

H - Electricity – 01 – T

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H01T 2/02 (2006.01) H01T 15/00 (2006.01) H02H 7/16 (2006.01) H02H 9/06 (2006.01)

Patent

CA 2613214

A series spark gap is triggered such that in parallel with partial spark gaps (1 , 2) of the series spark gap there are coupled first voltage distribution means. Further, at least in one partial spark gap (1 , 2) there is arranged an additional electrode (10) whose voltage is set to a given level by means of second voltage distribution means. The voltage level of the additional electrode (10) is changed by disturbing the voltage distribution of the second voltage distribution means. Thus the spark gap between the main electrode (6a, 6b) of the partial spark gap (1) and the additional electrode (10) will be ignited. Capacity of the second voltage distribution means is lower than that of the first voltage distribution means and consequently the voltage acting over the first voltage distribution means does not change significantly. Thus the voltage determined by the first voltage distribution means acts over the spark gap that is between the additional electrode (10) and the second main electrode (6a, 6b) of the partial spark gap (1) and that will also ignite, which further results in the supply voltage (U) acting only over the second partial spark gap (2), whereby a spark-over will also occur therein.

L'invention concerne un éclateur en série qui est déclenché de telle sorte que, en parallèle avec des éclateurs partiels (1, 2) de l'éclateur en série, est couplé un premier moyen de répartition de tension. En outre, dans au moins un éclateur partiel (1, 2) est disposée une électrode supplémentaire (10) dont la tension est réglée à un niveau donné au moyen d'un second moyen de répartition de tension. Le niveau de tension de l'électrode supplémentaire (10) est modifié en perturbant la répartition de tension du second moyen de répartition de tension. Ainsi, l'éclateur situé entre l'électrode principale (6a, 6b) de l'éclateur partiel (1) et l'électrode supplémentaire (10) sera amorcé. La capacité du second moyen de répartition de tension est inférieure à celle du premier moyen de répartition de tension et, en conséquence, la tension agissant sur le premier moyen de répartition de tension ne change pas significativement. Ainsi, la tension déterminée par le premier moyen de répartition de tension agit sur l'éclateur qui se trouve entre l'électrode supplémentaire (10) et la seconde électrode principale (6a, 6b) de l'éclateur partiel (1) qui s'amorcera également, ce qui résulte en outre en ce que la tension d'alimentation (U) n'agit que sur le second éclateur partiel (2), grâce à quoi se produira également une étincelle dans celui-ci.

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