Spark gap having a plurality of series-connected individual spark gaps, which are located in a stack arrangement

Abstract

The invention relates to a spark gap having a plurality of series-connected individual spark gaps which are in a stack arrangement, are separated from one another by dielectric discs (14) and are provided with a spring contact (13), wherein the individual spark gaps have annular or disc-type electrodes (12), and furthermore having control elements (11) for influencing the voltage distribution over the stack arrangement. According to the invention, the annular or disc-type electrodes (12) which are required to form one of the respective individual spark gaps are each inserted into one insulation body (19) and are held centred by it. The respective dielectric discs (14) are located between the insulation bodies (19), and are fixed by them. A recess is provided in the insulation body (19) in order to hold and centre the electrodes (12), and its shape is complementary to the contour of the respective electrode (12), with the recess having sprung centring projections (10) or centring tabs, which are at least partially flexible, on the internal circumference side.

Description

technical field [0001] The invention relates to a spark gap according to claim 1 , which has a plurality of individual spark gaps connected in series in a stacked arrangement, which are separated from each other by a sheet of insulating material and provided with a spring contact connection. The single spark gap has electrodes in the form of rings or plates, which spark gap also has control elements to influence the voltage distribution on the stacked device. Background technique [0002] In known direct current applications, the arc current must be forced to zero by raising the voltage required for the arc to a value greater than the available supply voltage (principle of direct current extinction). According to the known arc equation, different starting points can be derived to raise the voltage of the arc involved, according to which the total arc voltage is obtained by summing the anode / cathode voltage drop and by the product of arc length and arc field strength . [0...

AI Technical Summary

Problems solved by technology

Because the material is plastically deformed under thermal influences, e.g. due to continuous flow of the flow and the constant pressure due to the screw connection of the laminated structure, and the individual separation gaps can thus be short-circuited

Such damage cannot be detected and indicated due to insufficient thermal coupling of the protective device that may be provided, resulting in tearing of the welded edge of the separation gap material when reloading, and no longer between the two electrodes. There are defined and as far as possible gap-free transitions and unintended rises of the protection level cannot be avoided

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