Surge arrester arrangement

Abstract

The invention relates to a surge arrester arrangement (1). The surge arrester arrangement (1) comprises a charge eliminator column (17), a housing (3) in which the charge eliminator column (17) is arranged and which has a housing wall (19) which encloses the charge eliminator column (17) at a distance from the charge eliminator column (17), and a support device (21) which is connected to the charge eliminator column (17) and to the housing (19) and supports the charge eliminator column (17) on the housing wall (19).

Description

[0001] Description

[0002] Surge arrester arrangement

[0003] The invention relates to a surge arrester arrangement.

[0004] A surge arrester is designed to limit electrical overvoltages, such as those that can occur during a lightning strike. For this purpose, a surge arrester is designed, for example, as an arrester column containing a stack of varistor elements. To provide adequate surge protection, such arrester columns can be very long, for example, up to several meters, and correspondingly heavy, and therefore require support.

[0005] Surge arresters in gas-insulated applications in particular are often arranged in housings which can accordingly be long and heavy. In such a surge arrester arrangement, an arrester column must be placed mechanically securely in the housing, taking into account all mechanical loads relevant to the design. Due to manufacturing tolerances and the type of construction of the arrester column, radial tolerances caused, for example, by an inclination of the arrester column, as well as axial tolerances, for example length tolerances of the arrester column, must be taken into account when installing it in the housing. Therefore, due to the length of the arrester column, axial compensation and radial compensation are usually necessary in order to position the arrester column securely in its installation position.

[0006] WO 2022 / 073722 A1 discloses a conductor arrangement comprising an electrical conductor, a surge arrester, and an electrically insulating support. The support is arranged between the surge arrester and the electrical conductor in a longitudinal direction of the surge arrester. The support is supported by the electrical conductor, and the surge arrester is supported by the support.

[0007] The invention is based on the object of specifying a surge arrester arrangement with an arrester column which can be designed to be relatively long and therefore must be suitably supported.

[0008] The object is achieved according to the invention by a surge arrester arrangement having the features of claim 1.

[0009] Advantageous embodiments of the invention are the subject of the dependent claims.

[0010] A surge arrester arrangement according to the invention comprises

[0011] - a discharge column,

[0012] - a housing in which the arrester column is arranged and which has a housing wall which surrounds the arrester column at a distance from the arrester column, and

[0013] - a support device connected to the arrester column and the housing wall, which supports the arrester column on the housing wall.

[0014] The wording that the surge arrester arrangement comprises an arrester column is not to be understood as meaning that the surge arrester arrangement has only one arrester column. Rather, the surge arrester arrangement can have multiple arrester columns. The wording is therefore to be understood as meaning that the surge arrester arrangement has at least one arrester column. An exemplary embodiment of a surge arrester arrangement according to the invention with multiple arrester columns is shown in the figures.

[0015] A surge arrester arrangement according to the invention therefore has an arrester column arranged in a housing. As a result, the surge arrester arrangement can be designed to be gas-insulated, in particular by making the housing fluid-tight. The arrester column is supported by a support device on a housing wall of a housing of the surge arrester arrangement, wherein the housing wall surrounds the arrester column at a distance from the arrester column. As a result, the arrester column can be supported laterally on the housing wall by the support device in an electrically insulated manner from the housing wall, in order to prevent damage caused by external forces and / or deflection or inclination of the arrester column due to its own weight.

[0016] In one embodiment of the invention, the support device has a coupling element which is arranged between a first column section of the arrester column and a second column section of the arrester column. The arrester column is coupled to the support device by the coupling element. For this purpose, the coupling element is arranged between two column sections of the arrester column, each of which bears against the coupling element. If the surge arrester arrangement has a plurality of arrester columns, the support device can have a coupling element for each arrester column, which is arranged between two column sections of the arrester column.

[0017] In a further embodiment of the invention, the surge arrester arrangement has a connecting element which connects the first column section and the second column section to one another and is guided through a coupling element recess in the coupling element, wherein the coupling element recess has a larger diameter than the connecting element.

[0018] The wording that the surge arrester arrangement has such a connecting element is not to be understood as meaning that the surge arrester arrangement has only one such connecting element. Rather, the surge arrester arrangement can have a plurality of such connecting elements. The wording is therefore to be understood as meaning that the surge arrester arrangement has at least one such connecting element. If the surge arrester arrangement has a plurality of arrester columns and a coupling element for each of these, the surge arrester arrangement can have at least one such connecting element for each arrester column. Each of these connecting elements connects two column sections of an arrester column and is guided through a coupling element recess in the coupling element that is arranged between the column sections.The coupling element recess has a larger diameter than the connecting element. This allows the coupling element to be moved relative to the arrester column when connecting the column sections of the arrester column, for example, to compensate for radial tolerances or an inclination of the arrester column. The connecting elements are, for example, screws.

[0019] In a further embodiment of the invention, the support device comprises a support element with a support recess in which the coupling element is arranged. If the surge arrester arrangement comprises a plurality of arrester columns and a coupling element for each of these, the support element can have a support recess for each coupling element. The coupling elements are held and positioned by the support recesses in the support element, so that they are each assigned to a arrester column.

[0020] In a further embodiment of the invention, the support device has a sliding ring which bears against an edge of the support recess and against the coupling element and enables the coupling element to slide relative to the support element along a longitudinal axis of the arrester column. If the surge arrester arrangement has a plurality of arrester columns and a coupling element for each of these, the support device can have a sliding ring for each coupling element which bears against an edge of the support recess, in which the coupling element is arranged, and against the coupling element and enables the coupling element to slide relative to the support element along a longitudinal axis of the arrester column connected to the coupling element. The sliding ring fixes the coupling element in the support recess and enables axial manufacturing tolerances to be compensated for when connecting the column sections of the arrester column.

[0021] In a further embodiment of the invention, the support device comprises a plurality of support units, each support unit connecting the housing wall and the support element to one another. By connecting the support element to the housing wall by a plurality of support units, the support element can be securely and stably supported on the housing wall.

[0022] In a further embodiment of the invention, the housing wall has a housing wall opening for each support unit, through which the support unit is guided. This simplifies the assembly of the surge arrester arrangement by guiding each support unit through a housing wall opening of the housing.

[0023] In a further embodiment of the invention, each support unit is connected to the housing wall by a support flange connection. For example, each support flange connection of the housing wall to a support unit has a wall flange arranged on the outside of the housing wall and a support flange of the support unit corresponding to the wall flange. By means of such support flange connections, the support units can be fastened to the outside of the housing wall and thus in a way that is easy to install. Furthermore, such support flange connections can be used to create fluid-tight connections between the support units and the housing wall.

[0024] In a further embodiment of the invention, each

[0025] Support unit connected to the carrier element by a detachable connection. The detachable connection preferably has play in a direction parallel to a longitudinal axis of the support unit. This enables modular assembly of the support unit, in which the carrier element is connected to the support units, for example after the support units have been fastened to the housing wall. Play of the detachable connection of a support unit to the carrier element in a direction parallel to a longitudinal axis of the support unit advantageously enables displacement of the carrier element relative to the support unit when connecting the carrier element to the support unit in order to compensate for radial tolerances.

[0026] In a further embodiment of the invention, the housing comprises a first housing part and a second housing part. For example, the first housing part and the second housing part are connected to one another in a region extending in a ring around a longitudinal axis of the arrester column.

[0027] The wording that the housing has a first housing part and a second housing part should not be understood to mean that the housing has only two housing parts. Rather, the housing can also have more than two housing parts. The wording should therefore be understood to mean that the housing has at least two housing parts.

[0028] As already explained above, the invention relates to a surge arrester arrangement which can have a relatively long arrester column and therefore also a correspondingly large housing. The housing can, for example, be several metres high. During assembly of the surge arrester arrangement, the housing is generally pulled up over the arrester column. This generally requires a crane and, if the surge arrester arrangement is being assembled in a building, sufficient headroom. The aforementioned embodiment of the invention considerably simplifies both the transport and the assembly of the housing by dividing the housing into two parts.A connection of the housing parts in a region running in a ring around a longitudinal axis of the arrester column simplifies in particular a fluid-tight connection of the housing parts and the connection of a support device according to the invention to the housing wall, compared for example with a connection of the housing parts in a plane in which the longitudinal axis of the arrester column runs.

[0029] In a further embodiment of the invention, the first housing part and the second housing part are connected to one another in a fluid-tight manner. A fluid-tight connection of the housing parts enables, in particular, a gas-insulated design of the surge arrester arrangement.

[0030] In a further embodiment of the invention, the first housing part and the second housing part are detachably connected to one another. A detachable connection of the housing parts enables simplified assembly and disassembly of the surge arrester arrangement, for example, compared to a welded connection.

[0031] In a further embodiment of the invention, the first housing part and the second housing part are connected to one another by a housing flange connection. The housing flange connection is preferably arranged on an outer side of the housing.

[0032] A housing flange connection of the housing parts enables, in particular, a simple realization of a fluid-tight and detachable connection of the housing parts. The arrangement of the housing flange connection on an outer side of the housing simplifies access to the housing flange connection during assembly and disassembly of the surge arrester arrangement compared to an arrangement of the housing flange connection on an inner side of the housing. The properties, features, and advantages of this invention described above, as well as the manner in which they are achieved, will become clearer and more clearly understandable in connection with the following description of exemplary embodiments, which are explained in more detail in connection with the drawings. In the drawings:

[0033] FIG 1 shows an external view of an embodiment of a surge arrester arrangement,

[0034] FIG 2 is a sectional view of the surge arrester arrangement shown in Figure 1 in the area of ​​a housing flange connection,

[0035] FIG 3 shows a support device of the surge arrester arrangement shown in Figure 1 in the housing of the surge arrester arrangement,

[0036] FIG 4 a support element of the surge arrester arrangement shown in Figure 1,

[0037] FIG 5 a support unit of the surge arrester arrangement shown in Figure 1,

[0038] FIG 6 shows a connection of a support unit to the carrier element of the surge arrester arrangement shown in Figure 1.

[0039] Corresponding parts in the figures are provided with the same reference symbols.

[0040] Figure 1 (FIG 1) shows an external view of an embodiment of a surge arrester arrangement 1. The surge arrester arrangement 1 has a housing 3 which has a first housing part 5 and a second housing part 7. The first housing part 5 and the second housing part 7 are fluid-tight and detachably connected to one another by a housing flange connection 9. Figure 2 (FIG 2) shows a sectional view of the surge arrester arrangement 1 shown in Figure 1 in the region of the housing flange connection 9. The housing flange connection 9 has a first connecting flange 11 and a second connecting flange 13. The first connecting flange 11 forms one end of the first housing part 5 which faces the second housing part 7. The second connecting flange 13 forms one end of the second housing part 7 which faces the first housing part 5.A sealing element 15 is arranged between the first connecting flange 11 and the second connecting flange 13, which seals the connection between the connecting flanges 11, 13 in a fluid-tight manner. For example, the sealing element 15 is designed as a so-called O-ring.

[0041] The surge arrester assembly 1 comprises a plurality of (four in the exemplary embodiment shown here) arrester columns 17, which are arranged in the housing 3 at a distance from a housing wall 19 of the housing 3. Furthermore, the surge arrester assembly 1 comprises a support device 21 that supports the arrester columns 17 on the housing wall 19. Each arrester column 17 has a first column section 23 and a second column section 25. The support device 21 comprises a carrier element 27, a plurality of (four in the exemplary embodiment shown here) support units 29, and for each arrester column 17, a coupling element 31 and a sliding ring 33.

[0042] Figure 3 (FIG 3) shows the support device 21 in the housing 3 in a plan view.

[0043] Figure 4 (FIG 4) shows the support element 27 in a

[0044] Top view .

[0045] Figure 5 (FIG 5) shows a support unit 29. Figure 6 (FIG 6) shows a connection of a support unit 29 with the carrier element 27 in a sectional view.

[0046] The support element 27 is plate-shaped and has a support recess 35 for each coupling element 31, in which the coupling element 31 is arranged. Each coupling element 31 is disk-shaped and arranged between the first column section 23 and the second column section 25 of a discharge column 17. The column sections 23, 25 each have, for example, a stack of varistor elements, which are each made, for example, from a metal oxide. Furthermore, each column section 23, 25 has a column flange 26 which bears against a coupling element 31. The column flanges 26 of the two column sections 23, 25 of each arrester column 17 are connected to one another by connecting elements 36, which are each guided through a coupling element recess 37 in the coupling element 31, which is arranged between these column sections 23, 25.Each coupling element recess 37 has a larger diameter than the connecting element 36 that passes through the coupling element recess 37. This allows a coupling element 31 to be displaced relative to the arrester column 17 when connecting the column sections 23, 25 of a surge arrester column 17, for example, to compensate for radial manufacturing tolerances or an inclination of the surge arrester column 17. The connecting elements 36 are, for example, screws.

[0047] Each sliding ring 33 fixes a coupling element 31 in a support recess 35, resting against an edge of the support recess 35 and against the coupling element 31, and allowing the coupling element 31 to slide relative to the support element 27 along a longitudinal axis of the arrester column 17 between whose column sections 23, 25 the coupling element 31 is arranged. This allows axial manufacturing tolerances to be compensated for when connecting the column sections 23, 25 of the arrester column 17.

[0048] Each support unit 29 is connected to the housing wall 19 and to the carrier element 27. The housing wall 19 has a housing wall opening 39 for each support unit 29 in the second housing part 7, through which opening the support unit 29 is guided and which is surrounded by a wall flange 41 arranged on the outside of the housing wall 19. The support unit 29 has a support flange 43 corresponding to the wall flange 41, which forms a support flange connection 45 with the wall flange 41, via which support flange connection the support unit 29 is fastened to the outside of the housing wall 19. Furthermore, the support unit 29 has an end region 47 which is detachably connected to the carrier element 27. This detachable connection of the support unit 29 to the carrier element 27 has a play in a direction parallel to a longitudinal axis of the support unit 29. For this purpose, the end region 47 has a recess 49 into which an edge region 51 of the carrier element 27 is received.This edge region 51 of the support element 27 has two elongated holes 53, through each of which a fastening element 55 is guided, which is connected to the regions of the end region 47 of the support unit 29 surrounding the edge region 51. The elongated holes 53 enable the support element 27 to be moved relative to the support unit 29 in a direction parallel to a longitudinal axis of the support unit 29 when connecting the support element 27 to the support unit 29 in order to compensate for radial manufacturing tolerances. The end region 47 of the support unit 29 is connected to the section of the support unit 29 having the support flange 43 by an insulating section 57 of the support unit 29, which is made of an electrically insulating material and electrically insulates the support element 27 from the housing wall 19.

[0049] Although the invention has been illustrated and described in detail by means of preferred embodiments, the invention is not limited by the disclosed examples and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Claims

Patent claims 1. Surge arrester arrangement (1) comprising - a discharge column (17), - a housing (3) in which the arrester column (17) is arranged and which has a housing wall (19) which surrounds the arrester column (17) at a distance from the arrester column (17), and - a support device (21) connected to the arrester column (17) and the housing wall (19), which supports the arrester column (17) on the housing wall (19).

2. Surge arrester arrangement (1) according to claim 1, wherein the support device (21) has a coupling element (31) which is arranged between a first column section (23) of the arrester column (17) and a second column section (25) of the arrester column (17).

3. Surge arrester arrangement (1) according to claim 2, with a connecting element (36) which connects the first column section (23) and the second column section (25) to one another and is guided through a coupling element recess (37) in the coupling element (31), wherein the coupling element recess (37) has a larger diameter than the connecting element (36).

4. Surge arrester arrangement (1) according to claim 2 or 3, wherein the support device (21) has a carrier element (27) with a carrier recess (35) in which the coupling element (31) is arranged.

5. Surge arrester arrangement (1) according to claim 4, wherein the support device (21) has a sliding ring (33) which bears against an edge of the support recess (35) and against the coupling element (31) and enables the coupling element (31) to slide relative to the support element (27) along a longitudinal axis of the arrester column (17).

6. Surge arrester arrangement (1) according to claim 4 or 5, wherein the support device (21) has a plurality of support units (29), each support unit (29) connecting the housing wall (19) and the carrier element (27) to one another.

7. Surge arrester arrangement (1) according to claim 6, wherein the housing wall (19) has a housing wall opening (39) for each support unit (29) through which the support unit (29) is guided.

8. Surge arrester arrangement (1) according to claim 6 or 7, wherein each support unit (29) is connected to the housing wall (19) by a support flange connection (45).

9. Surge arrester arrangement (1) according to claim 8, wherein each support flange connection (45) of the housing wall (19) with a support unit (29) has a wall flange (41) arranged on the outside of the housing wall (19) and a support flange (43) of the support unit (29) corresponding to the wall flange (41).

10. Surge arrester arrangement (1) according to one of claims 6 to 9, wherein each support unit (29) is connected to the carrier element (27) by a detachable connection.

11. Surge arrester arrangement (1) according to one of the preceding claims, wherein the housing (3) has a first housing part (5) and a second housing part (7).

12. Surge arrester arrangement (1) according to claim 11, wherein the first housing part (5) and the second Housing part (7) are connected to one another in a ring-like area around a longitudinal axis of the arrester column (17).

13. Surge arrester arrangement (1) according to claim 11 or 12, wherein the first housing part (5) and the second housing part (7) are connected to one another in a fluid-tight manner.

14. Surge arrester arrangement (1) according to one of claims 11 to 13, wherein the first housing part (5) and the second housing part (7) are detachably connected to one another.

15. Surge arrester arrangement (1) according to one of claims 11 to 14, wherein the first housing part (5) and the second housing part (7) are connected by a Housing flange connection (9) are connected to each other.

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