Device and method for triggering a spark gap

H - Electricity – 01 – T

Patent

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H01T 2/02 (2006.01)

Patent

CA 2481019

The invention relates to a device for quick closing of an electric high- voltage circuit. The device comprises a spark gap (1), provided with a first (2) and a second (3) main electrode, and a triggering device (10). The triggering device comprises an auxiliary spark gap (4) provided with a first (5) and a second (6) auxiliary electrode and is adapted, where necessary, to generate an arc (a) in the auxiliary spark gap (4) to ignite an arc (A) in the main spark gap (1). According to the invention, each auxiliary electrode (5, 6) is provided with a guide rail (13, 14) designed such that the arc, via the guide rails and while being influenced by the generated magnetic field, moves into the main spark gap (1). The length of the guide rails is larger than the width of the auxiliary spark gap (4). The auxiliary electrodes (5, 6) are arranged such that they are protected from the effect of plasma formed in the main spark gap. The spark gaps are enclosed in a hermetic enclosure. The invention also relates to a method and a use.

L'invention concerne un dispositif permettant de fermer rapidement un circuit électrique haute tension. Ce dispositif comprend un éclateur (1) équipé de première (2) et de seconde (3) électrodes et un dispositif de déclenchement (10) Le dispositif de déclenchement comprend un éclateur auxiliaire (4) équipé de première (5) et de seconde (6) électrodes auxiliaires, conçu, si nécessaire, afin de produire un arc (a) dans l'éclateur auxiliaire (4) afin d'amorcer un arc (A) dans l'éclateur principal (1). Selon cette invention, chaque électrode auxiliaire (5, 6) est équipée d'un rail guide (13, 14) conçu de telle façon que l'arc, via les rails guide, et tout en étant influencé par le champ magnétique, se déplace dans l'éclateur principal (1). La longueur des rails guide est plus importante que la largeur de l'éclateur auxiliaire (4). Les électrodes auxiliaires (5, 6) sont agencées de façon à être protégées de l'effet de plasma formé dans l'éclateur principal. Les éclateurs sont disposés dans une enceinte hermétique. L'invention concerne aussi un procédé et une utilisation.

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