Spark gap assembly

Abstract

The invention relates to a spark gap arrangement (1), comprising at least one holding frame (2) and at least two electrodes (3), the holding frame (2) having an edge (4) which surrounds a recess (5) for receiving the at least one electrode (3). In the spark gap arrangement (1) according to the invention, a stable arrangement and orientation of the electrodes are permanently achieved in that the retaining frame (2) has a collar-shaped bearing section (6) which is directed inwards from the edge (4) and against which the electrode (3) rests with the edge section (7) on each side, the edge (4) is designed such that the two electrodes (3) are arranged opposite each other in the holding frame (2) at a distance corresponding to the thickness of the bearing section (6), and the edge (4) is designed such that the two electrodes (3) are arranged in the holding frame (2) so as not to completely overlap each other.

Description

Technical Field

[0001] The invention relates to a spark gap assembly having at least one holding frame and at least two electrodes, wherein the holding frame has an edge which surrounds a recess for accommodating at least one electrode. The invention also relates to a holding frame for such a spark gap assembly. Background Art

[0002] Overvoltage protection devices are known from the prior art in various variants. They are used to protect electrical devices or lines from overvoltages, which can be caused, for example, by faults in technical equipment or lightning strikes. In the field of overvoltage protection of electrical devices and systems, spark gap assemblies with multiple electrodes have been used for decades. In order to discharge high overvoltages and at the same time ensure a high network current quenching capability (Netzfolgestrom- ), multiple spark gaps are often used, which are also called stacked spark gaps due to their structure. Such stacked spark gaps consist of a plurality of electrodes and a plurality of insulating parts, which are arranged between the individual electrodes, so that an insulating part is respectively present between two electrodes, which insulating part has an opening in the center, so that the two electrodes form a spark gap. The electrodes are usually designed as circular or rectangular graphite sheets, between which corresponding annular or frame-shaped insulating parts are then arranged. The insulating part is often designed as a thin insulating film composed of plastic (for example PTFE) and has a thickness of usually less than 1 mm.

[0003] From practice, various possibilities are known for connecting individual electrodes and individual insulating layers to form a stacked spark gap. For this purpose, large-area contact plates are often used, which form the end faces of the stacked spark gap and are clamped to one another in the axial direction by screws via a plurality of guide rods, so that the individual electrodes and the individual insulators are clamped in their stacked arrangement between the contact plates. If the guide rods arranged between the contact plates are guided externally past the individual electrodes, this results in a relatively large required installation space.

[0004] DE 20 2013 102 647 U1 discloses a stacked spark gap in which the required structural space is reduced by the fact that the individual electrodes are perforated in the middle and the contact plates arranged at the end sides of the stacked electrodes are connected to one another by guide rods which penetrate the perforations of the individual electrodes and the perforations of the annular insulation. By using only the guide rods and their components located inside, a stacked spark gap can be realized whose required structural space is not significantly larger than the structural space of the stacked electrodes.

[0005] DE 102016114787 A1 discloses a carrier unit for a spark gap that can be switched in series and stacked, which carrier unit consists of an insulator having a recess for an electrode. According to an embodiment variant, the insulator is designed so that it accommodates a single electrode, wherein a plurality of insulators are then stacked one on top of the other. In addition, a radial opening is formed in the insulator, which is connected to the receptacle for the electrode, so that the electrode can be contacted through the opening at its radial outer side.

[0006] DE 102011102864 A1 also discloses a stacked spark gap having a plurality of individual spark gaps connected in series, wherein the individual electrodes are arranged in an insulator. The insulators each have a recess for accommodating a plate-shaped electrode and a receptacle for a control element, wherein the receptacle for the control element is connected to the recess for the electrode. The control element is connected to the edge of the electrode via a contact spring, so that the individual electrodes of the stacked spark gap can be triggered via the control element.

[0007] As the degree of integration increases, spark gap components, in particular stacked spark gaps, must absorb increasingly higher amounts of energy, which results in intense heating of the electrodes and therefore also of the holding frame that accommodates the electrodes. Summary of the invention

[0008] The object of the present invention is therefore to provide a spark gap assembly which permanently achieves a high power capability. In addition, a holding frame which can be used in such a spark gap assembly should be provided.

[0009] This object is achieved in the spark gap assembly described at the outset having the features of claim 1 in that the holding frame has a collar-shaped supporting section pointing inward from the edge, against which the electrodes rest with edge sections on both sides, so that the two electrodes are arranged opposite each other in the holding frame at a distance corresponding to the thickness of the supporting section.

[0010] The collar-shaped support section also assumes the function of a separate insulating film between the individual electrodes, which is usually used in stacked spark gaps. The inner edge of the support section forms the outer boundary of the arc combustion chamber formed between the two electrodes arranged opposite to each other, wherein the axial extension of the arc combustion chamber is determined by the thickness of the support section. Since the two electrodes are placed against the support section of the holding frame, the two electrodes at least partially accommodated by the holding frame have a defined distance from each other that is preset by the thickness of the support section. As a result, a spark gap assembly with very small dimensions can be realized, especially in the longitudinal extension of the spark gap assembly or the stacked spark gap. Since the collar-shaped support section is constructed at the holding frame, there is no need for a separate arrangement and fixing of the support section between the two electrodes arranged opposite to each other, as is the case with a separate insulating film. As a result, the assembly of the spark gap assembly is simplified, especially when the spark gap assembly has a plurality of holding frames and a plurality of electrodes.

[0011] In the spark gap assembly according to the invention, the edge of the holding frame is designed in such a way that the two electrodes resting on the support section are arranged in the holding frame in a manner that they do not completely overlap one another. This design of the holding frame results in at least one region of the edge being in contact with the electrode only on one side, i.e. the electrode does not rest on the second side of this region of the edge. The one-sided contact or support of the electrode in the region of the edge of the holding frame results in less intense heating of the edge of the holding frame in this region. This ensures that the electrode is permanently and reliably held in its position in the holding frame. According to the invention, it is already known that the exact arrangement of the electrodes relative to one another is particularly important for the power capacity of a spark gap, in particular a stacked spark gap.

[0012] In the spark gap arrangement according to the invention, the electrode is held in its position not only by the edge of the holding frame surrounding the recess but also by the collar-shaped support section of the holding frame. The design of the holding frame edge, due to which the two electrodes resting against the support section are arranged in the holding frame not completely overlapping each other, results in the holding frame being heated less intensely when the electrodes are heated than would be the case if the electrodes were arranged in the holding frame just overlapping each other.

[0013] Although the spark gap assembly according to the invention can in principle also have only one holding frame and two electrodes, the spark gap assembly preferably consists of a plurality of holding frames and correspondingly a plurality of electrodes, so that the spark gap assembly is a multiple spark gap or a stacked spark gap. The edges of the individual holding frames are each designed in this case so that two electrodes arranged adjacent to each other are arranged so as not to completely overlap each other.

[0014] If the spark gap assembly has two holding frames, a total of three electrodes can be accommodated by the two holding frames, wherein the middle electrode is arranged between the two holding frames and is therefore accommodated by both holding frames. In contrast, the two outer electrodes are placed on the support section of the holding frame only with one end side (front side or rear side), while the other end side is electrically contacted by the contact plate and held in the holding frame. Thus, a spark gap assembly with n holding frames can accommodate n+1 electrodes.

[0015] According to a first embodiment of the spark gap assembly, the edge of the holding frame is designed so that the base surfaces of the two electrodes are arranged in the holding frame offset from one another. Thus, the two electrodes resting on both sides of the support section are arranged in the holding frame so as to be movable parallel to one another. The displacement of the two electrodes relative to one another can be realized in this case only in one direction or simultaneously in two directions perpendicular to one another. In the case of a vertical orientation of the holding frame, the two electrodes can then be arranged in the holding frame so as to be movable relative to one another in the horizontal direction and / or in the vertical direction.

[0016] The previously described offset or mutually shifted arrangement of the electrodes in the holding frame can preferably be realized in that a step is respectively constructed on two mutually opposite sides of the edge, wherein the two steps are arranged point-symmetrically with respect to each other. Thus, one step is arranged on one side of the support section on one side of the frame, and the other step is arranged on the other side of the support section on the opposite side of the frame. The construction scheme of the two corresponding steps at the edge of the holding frame leads to the electrodes each resting on the step with their edge sections, i.e. one electrode rests on the first step with its first edge section, and the other electrode rests on the second step with its second edge section.

[0017] According to a preferred design, the edge of the holding frame has at least one approximately rectangular inner contour on both sides of the support section. In the case of a vertical orientation of the holding frame, the two previously described steps can then be configured at the upper and lower sides of the edge, so that the two electrodes are arranged in the holding frame so as to be movable relative to each other in the vertical direction. Alternatively, the two steps can also be configured at the left and right sides of the edge, so that the two electrodes are arranged in the holding frame so as to be movable relative to each other in the horizontal direction.

[0018] According to another embodiment, steps can also be formed on all four sides of the edge. Thus, in the case of the vertical orientation of the holding frame mentioned above, not only on the upper and lower sides of the edge, but also on the left and right sides of the edge. In this case, the two steps formed on the opposite sides of the edge are also arranged point-symmetrically with respect to each other, that is, on different sides of the support section.

[0019] As explained above, the edge of the holding frame can have an approximately rectangular inner contour. Alternatively, the edge of the holding frame can also have a circular inner contour on both sides of the support section, wherein the electrode is then constructed as a circular sheet. Even in such a construction scheme of the edge of the holding frame, steps can be constructed at two mutually opposite sides of the edge, wherein the two steps are arranged point-symmetrically with respect to each other, so that one step is on one side of the support section and the other step is on the other side of the support section. In the case of a vertical orientation of the holding frame, the two electrodes are then arranged in the holding frame so as to be movable relative to each other in the horizontal direction. Alternatively, the two steps can also be constructed here at the left and right sides of the edge, so that the two electrodes are arranged in the holding frame so as to be movable relative to each other in the vertical direction.

[0020] According to the second basic design of the spark gap, the edge of the holding frame is designed in such a way that the two electrodes are arranged in the holding frame so as to be twisted relative to one another about their central axis arranged perpendicularly to the plane of the holding frame. In contrast to the first design, the base surfaces of the two electrodes are then arranged in the holding frame not offset relative to one another but twisted relative to one another.

[0021] In this design, the holding frame preferably has an outer contour and an inner contour, each of which is slightly different from a rectangle. Since the holding frame has a collar-shaped supporting section pointing inward, the inner contour of the holding frame is determined by the inner edge of the supporting section. According to a preferred embodiment, the collar-shaped supporting section can have an octagonal inner edge here. The inner contour of the edge can also be configured rectangularly on both sides of the supporting section. However, unlike the first design, the inner contour of the edge on one side of the supporting section is now arranged in a twisted manner relative to the inner contour of the edge on the other side of the supporting section. As a result, the two electrodes accommodated by the holding frame on both sides of the supporting section are also arranged in a twisted manner relative to each other around their central axis arranged perpendicular to the plane of the holding frame.

[0022] In the two previously described embodiments of the spark gap, the collar-shaped support section of the holding frame is preferably circumferentially designed so that the electrodes rest with circumferential edge sections on both sides of the support section. The circumferential contact of the electrodes on the support section results in a particularly accurate and reliable determination of the distance between electrodes lying opposite one another, which has a positive effect on the power capability of the spark gap assembly.

[0023] According to another advantageous embodiment of the spark gap assembly or the holding frame according to the invention, at least one receiving opening is formed in the edge of the holding frame, in which a control element can be arranged. The at least one receiving opening is designed in this case so that the receiving opening is connected to a recess in the holding frame, so that the control element (for example a capacitor) arranged in the receiving opening contacts at least one electrode accommodated in the holding frame.

[0024] As already explained above, the spark gap assembly preferably consists of a plurality of holding frames and correspondingly also a plurality of electrodes, so that the spark gap assembly is a multiple spark gap or a stacked spark gap. In such a spark gap assembly having at least two holding frames and at least three electrodes, wherein the holding frames are arranged one above the other, the holding frames preferably each have at least one locking element on at least one side, wherein when two holding frames are stacked on one another, the two locking elements of the two holding frames act together. This also simplifies the positioning of the individual holding frames relative to one another and ensures that the position of the individual holding frames relative to one another cannot be accidentally changed again when the spark gap assembly is assembled.

[0025] There are various possibilities for designing the locking between the individual holding frames. For example, the holding frames can each have at least one latching element on the front side and a mating latching element on the rear side, wherein when two holding frames are stacked on top of each other, the latching element of one holding frame engages in the mating latching element of the second holding frame. For example, a pin-shaped bolt can be provided as the latching element and a bolt hole corresponding thereto can be provided as the mating latching element.

[0026] The individual electrodes of the spark gap assembly are preferably rectangular, especially square sheets made of graphite or tungsten-copper composite material. The thickness of the electrode sheet can be less than 5 mm, especially less than 3 mm. Alternatively, the electrode can also be configured as a circular sheet.

[0027] The object mentioned at the outset is achieved in a holding frame for a corresponding spark gap assembly having the features of claim 11. The holding frame has an edge that surrounds a recess for accommodating an electrode, wherein the recess is adapted to the outer dimensions of the electrode. According to the invention, it is provided that the holding frame has collar-shaped support sections pointing inward from the edge as contact surfaces for the electrodes on one side of the support section. The edge is designed in this case so that two electrodes inserted into the holding frame do not completely overlap each other.

[0028] With regard to the advantageous design of the holding frame, reference can be made to the corresponding explanations above regarding the spark gap assembly. Thus, at least two sides of the edge of the holding frame are preferably provided with steps, wherein the two steps that are arranged opposite to each other are arranged point-symmetrically to each other. The two electrodes accommodated by the holding frame, which are respectively attached to one side of the support section, are then arranged offset to each other in the holding frame.

[0029] In an alternative embodiment of the holding frame, the edge is designed so that the two electrodes inserted into the holding frame are arranged in the holding frame in a manner twisted relative to each other about their central axis M arranged perpendicular to the plane of the holding frame. According to a preferred embodiment, the collar-shaped support section then has an octagonal inner edge, while the inner contour of the edge is designed rectangular on both sides of the support section. However, the inner contour of the edge is arranged twisted on one side of the support section relative to the inner contour of the edge on the other side of the support section.

[0030] The holding frame can consist of plastic or ceramic material and has a relatively small thickness of preferably less than 10 mm, in particular less than 5 mm. However, in principle, other insulating materials and other dimensions, in particular other thicknesses, for the holding frame are also feasible. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In detail, there are many possible solutions for improving and designing the spark gap assembly and the holding frame according to the invention. For this, reference is made not only to the dependent patent claims but also to the description of the preferred embodiments in conjunction with the drawings. Among them:

[0032] Figure 1 A spark gap assembly with a holding frame and two electrodes is shown in an exploded view,

[0033] Figure 2 From the front it shows the Figure 1 The spark gap assembly, into which the electrodes are inserted,

[0034] Figure 3 Shown according to Figure 2 A cross-sectional view of a spark gap assembly,

[0035] Figure 4 Shows Figure 3 A magnified detail of

[0036] Figure 5 The top view shows Figure 1 The spark gap assembly retaining frame,

[0037] Figure 6 A spark gap assembly with three holding frames and four electrodes is shown in an exploded view,

[0038] Figure 7 From the front it shows the Figure 6 The spark gap assembly,

[0039] Figure 8 Shown according to Figure 7 A cross-sectional view of a spark gap assembly,

[0040] Fig. 9 A further embodiment of a spark gap assembly with a holding frame and two electrodes is shown in a top view,

[0041] Fig.10 Shown according to Fig. 9 A cross-sectional view of a spark gap assembly, and

[0042] Fig.11 The top view shows Fig. 9 A retaining frame for the spark gap assembly. DETAILED DESCRIPTION

[0043] Figures 1 to 4 An embodiment variant of a spark gap assembly 1 is shown, which has a holding frame 2 and two electrodes 3 which are partially accommodated by the holding frame 2 . Figures 6 to 8 An embodiment variant of a spark gap assembly 1 is shown, which has three holding frames 2 and four electrodes 3, wherein the holding frames 2 are arranged one above the other. Figure 2 Only one holding frame 2 is shown and Figure 7 , three holding frames 2 are shown, but the number of holding frames 2 and therefore also the number of electrodes 3 as part of the spark gap assembly 1 is not limited thereto. Thus, the spark gap assembly 1 can also have significantly more holding frames 2 and therefore also significantly more electrodes 3. In principle, a spark gap assembly 1 with n holding frames 2 can accommodate a total of n+1 electrodes 3.

[0044] Figure 1 An exploded view of a spark gap assembly 1 is shown, which has a holding frame 2 and two electrodes 3 which have not yet been inserted into the holding frame 2 . Figure 2 The same spark gap assembly 1 is shown obliquely from the front, with the electrode 3 inserted into the holding frame 2 and Figure 3 A spark gap assembly 1 is shown in longitudinal section.

[0045] From the illustration of the spark gap assembly 1 and also from the Figure 5It can be seen in the illustration of a single holding frame 2 that the holding frame 2 has an edge 4 which surrounds a recess 5 for accommodating the electrode 3. In the embodiment shown, the electrode 3 is rectangular, so that the recess 5 surrounded by the edge 4 is also rectangular. Furthermore, in the embodiment shown, the edge 4 of the holding frame 2 is completely circumferential. However, it is also possible in principle for the edge to have an interruption, as long as it is ensured that the electrode 3 is reliably accommodated in the holding frame 2.

[0046] from Figure 5 It can also be seen that the holding frame 2 has a collar-shaped support section 6 pointing inwardly toward the central axis M, against which the electrode 3 rests with its edge sections 7 on both sides when the electrode is accommodated by the holding frame 2. The electrode 3 is therefore held in its position in the direction of the central axis M, in particular, by the support section 6. In the exemplary embodiment shown, the support section 6 is completely circumferential, so that the electrode 3 also rests with its circumferential edge section 7 against the support section 6.

[0047] In addition to the function of positioning the electrodes 3 in the holding frame 2, the support section 6 also assumes the function of a separate insulating film, which is otherwise often used in stacked spark gaps, between the individual electrodes 3. The thickness of the support section 6 determines the distance at which the two electrodes 3 are arranged opposite each other in the holding frame 2. The thickness of the support section 6 thus determines the axial extent of the arc combustion chamber 8 formed between the electrodes 3 lying opposite each other.

[0048] exist Figure 5 In the embodiment shown in FIG. 1 , the edge 4 of the holding frame 2 has a rectangular inner contour 9 on both sides of the support section 6. In addition, steps 10, 10' are respectively formed on two mutually opposite sides of the edge 4. Figure 3 In the illustration, the first step 10 at the upper side of the edge 4 is on the left side of the support section 6, while the second step 10' at the lower side of the edge 4 is constructed on the right side of the support section 6. Therefore, the two steps 10, 10' are arranged point-symmetrically with each other. This results in a left electrode 3 with an upper first edge section 7' ​​at the first step 10 abutting against the edge 4 at the top, while the other right electrode 3 with a lower second edge section 7" at the second step 10' abuts against the edge 4 of the retaining frame 2 at the bottom. Figure 3 It can be seen in FIG. 2 that the two electrodes 3 are therefore not arranged completely one above the other but are arranged offset relative to one another in the holding frame 2 . In the illustrated orientation of the holding frame 2 , the two electrodes 3 are vertically displaced relative to one another.

[0049] This design with two steps 10, 10' arranged point-symmetrically to each other results in that the edge 4 is contacted by the electrode 3 only on one side in the region of the steps 10, 10'. In the case of the upper step 10, only the upper edge section 7' ​​of the left electrode 3 rests on the vertical region of the step 10, while the right electrode 3 rests only on the support section 6 with its upper edge section 7'. Correspondingly, only the lower edge section 7" of the right electrode 3 rests on the vertical region of the lower step 10', while the left electrode 3 rests only on the support section 6 with its lower edge section 7". The only one-sided contact or support of the electrode 3 in the region of the edge 4 of the holding frame 2 results in less intense heating of the edge 4 of the holding frame 2 in this region. As a result, no deformation of the edge 4 of the holding frame 2 occurs, so that the arrangement and orientation of the electrodes 3 relative to each other remain permanently stable.

[0050] Especially from Figure 2 and Figure 5 As can be seen in the figure, a plurality of receiving openings 11 are formed in the edge 4 of the holding frame 3, into which control elements can be inserted respectively. The control elements, which can be capacitors in particular, are used to control or trigger individual spark gaps of a stacked spark gap consisting of a plurality of spark gaps, for which the control elements are respectively electrically contacted with the electrodes 3 at their narrow sides.

[0051] Figures 6 to 8 The present invention shows a spark gap arrangement 1 with three holding frames 2 and four electrodes 3, i.e. a stacked spark gap with three spark gaps arranged one behind the other. The individual holding frames 2 are arranged one above the other or in a manner similar to that of the embodiment of the present invention. Figure 7 In the case of a horizontal arrangement of the holding frames 2, the holding frames 2 are arranged one after another. Here, the individual holding frames 2 are correspondingly arranged with each other in Figure 5 The holding frames 2 shown individually in FIG. 1 are designed identically.

[0052] From the basis Figure 8 It can be seen from the cross-sectional view that the electrodes 3 arranged adjacent to each other here are also arranged offset to each other in the holding frame 2. However, the spark gap assembly 1 is of square design as a whole, because the individual holding frames 2 are arranged one above the other in the direction of the central axis. In contrast, the electrodes 3 accommodated in the holding frames 2 are arranged offset to each other alternately upward or downward.

[0053] Figures 9 to 11 A further embodiment of a spark gap assembly 1 is shown, wherein the spark gap assembly 1 has a holding frame 2 and two electrodes 3. Even in this embodiment of the spark gap assembly 1, the number of holding frames 2 and therefore also the number of electrodes 3 as part of the spark gap assembly 1 is not limited to the number shown in the illustrated embodiment. The spark gap assembly 1 can also have a plurality of holding frames 2 and therefore also more than two electrodes 3.

[0054] As from Fig.11 It can be seen that in this embodiment, the retaining frame 2 is connected to the Figure 5 The holding frame 2 shown in FIG. is constructed slightly differently. Fig.11 In the holding frame 2 shown in FIG. 1 , the edge 4 is designed in such a way that the two electrodes 3 are arranged in the holding frame 2 so as to be twisted relative to each other about their center axis M arranged perpendicular to the plane of the holding frame 2. Thus, unlike the first embodiment, the two electrodes 3 are arranged in the holding frame 2 so as not to be offset relative to each other, but rather to be twisted relative to each other.

[0055] In this embodiment, the holding frame 2 has an inner contour 12 and an outer contour 13, each of which deviates slightly from a rectangle. The inner contour 12 of the holding frame 3 is determined by the inner edge of the support section 6. In the embodiment shown, the collar-shaped support section 6 has an octagonal inner edge, so that the inner contour 12 of the holding frame 2 is also octagonal.

[0056] exist Fig.11 , the inner contour 9 of the edge 4 on the second side, the rear side, of the support section 6 is shown by dashed lines. It can be seen from this that the inner contour 9 of the edge 4 is rectangularly configured on both sides of the support section 6. However, the inner contour 9 of the edge 4 on one side, the front side, of the support section 6 is arranged twisted relative to the inner contour 9 of the edge 4 on the other side, the rear side, of the support section 6. Therefore, the two electrodes 2 accommodated by the holding frame 2 on both sides of the support section 6 are also arranged twisted relative to each other around their central axis M arranged perpendicular to the plane of the holding frame 2.

[0057] List of reference numerals:

[0058] 1 Spark Gap Assembly

[0059] 2. Keep the frame

[0060] 3 electrodes

[0061] 4 Edge

[0062] 5 recesses

[0063] 6 Supporting sections

[0064] 7 Edge Segment

[0065] 7” first edge section

[0066] 7” Second edge section

[0067] 8 Arc combustion chamber

[0068] 9Inner contour of the edge

[0069] 10First step

[0070] 10' Second step

[0071] 11Accommodate opening

[0072] 12. Maintain the inner contour of the frame

[0073] 13. Keep the outer contour of the frame

[0074] M Center axis

Claims

1. A spark gap assembly (1) comprising at least one holding frame (2) and at least two electrodes (3), wherein: The holding frame (2) has an edge (4) which surrounds a recess (5) for accommodating at least one electrode (3). It is characterized in that The holding frame (2) has a collar-shaped support section (6) pointing inward from the edge (4), and the electrodes (3) are in contact with the support section on both sides with edge sections (7), so that the two electrodes (3) are arranged opposite each other in the holding frame (2) at a distance corresponding to the thickness of the support section (6), and The edge (4) is designed in such a way that the two electrodes (3) are arranged in the holding frame (2) in a manner that they do not completely overlap one another.

2. The spark gap assembly (1) according to claim 1, characterized in that The edge (4) of the holding frame (2) is designed in such a way that the base surfaces of the two electrodes (3) are arranged offset with respect to one another in the holding frame (2).

3. The spark gap assembly (1) according to claim 2, characterized in that The edge (4) of the holding frame (2) has a rectangular inner contour (9) on both sides of the support section (6).

4. The spark gap assembly (1) according to claim 2 or 3, characterized in that Steps (10, 10') are respectively formed on two mutually opposite side surfaces of the edge (4), wherein the two steps (10, 10') are arranged point-symmetrically with each other so that one electrode (3) abuts against the first step (10) with a first edge section (7') and the other electrode (3) abuts against the second step (10') with a second edge section (7').

5. Spark gap assembly (1) according to claims 3 and 4, characterized in that Steps are formed on all four side surfaces of the edge (4), wherein two steps (10, 10') formed on the side surfaces opposite to each other are arranged point-symmetrically to each other.

6. The spark gap assembly (1) according to claim 1, characterized in that The edge (4) of the holding frame (2) is designed in such a way that the two electrodes (3) are arranged in the holding frame (2) twisted relative to one another about their central axis M arranged perpendicularly to the plane of the holding frame (2).

7. The spark gap assembly (1) according to any one of claims 1 to 6, characterized in that The collar-shaped support section (6) of the holding frame (2) is circumferentially designed, and the electrodes (3) rest with circumferential edge sections (7) on both sides of the support section (6).

8. The spark gap assembly (1) according to any one of claims 1 to 7, characterized in that At least one receiving opening (11) is constructed in the edge (4) of the holding frame (2), and a control element can be arranged in the receiving opening, wherein the at least one receiving opening (11) is connected to a recess (5) in the holding frame (2), so that the control element arranged in the receiving opening (11) is in contact with at least one electrode (3) accommodated in the holding frame (2).

9. The spark gap assembly (1) according to claim 1, comprising at least two holding frames (2) and at least three electrodes (3), wherein: The holding frames (2) are arranged one above the other in a planar manner, characterized in that the holding frames (2) each have at least one locking element on at least one side, wherein when two holding frames (2) are stacked on top of each other, the two locking elements of the two holding frames (2) act together.

10. The spark gap assembly (1) according to any one of claims 1 to 9, characterized in that The individual electrodes (3) are designed as preferably rectangular sheets of graphite or a tungsten-copper composite material.

11. A holding frame (2) for a spark gap assembly (1) according to any one of claims 1 to 10, comprising an edge (4) which surrounds a recess (5) for accommodating an electrode (3), characterized in that: The holding frame (2) has collar-shaped supporting sections (6) pointing inward from the edge (4) as contact surfaces for electrodes (3) on one side of the supporting sections (6), and the edge (4) is designed in such a way that two electrodes (3) inserted into the holding frame (2) are arranged not completely overlapping each other.

12. The holding frame (2) according to claim 11, characterized in that The edge (4) has a rectangular inner contour (9) on both sides of the support section (6), and steps (10, 10') are respectively formed on at least two sides of the edge (4) that are opposite to each other, wherein the two steps (10, 10') that are opposite to each other are arranged point-symmetrically with respect to each other.

13. The holding frame (2) according to claim 11, characterized in that The edge (4) of the holding frame (2) is designed in such a way that the two electrodes (3) are arranged in the holding frame (2) twisted relative to one another about their central axis M arranged perpendicularly to the plane of the holding frame (2).

14. The holding frame (2) according to any one of claims 11 to 13, characterized in that At least one receiving opening (11) for receiving a control element is formed in the edge (4), wherein the at least one receiving opening (11) is connected to a recess (5) in the holding frame (2).

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