Explosion-proof lightning arrester for switch equipment and switch equipment with explosion-proof lightning arrester

Abstract

The utility model relates to an explosion-proof lightning arrester for switch equipment and the switch equipment with the explosion-proof lightning arrester, the explosion-proof lightning arrester comprises a lightning arrester shell, the lightning arrester shell comprises a transverse shell and a vertical shell extending from the transverse shell along the vertical direction, the transverse shell is provided with a connecting opening, and the vertical shell is provided with a mounting cavity extending along the vertical direction; the upper conductive terminal is arranged on the transverse side, far away from the switch equipment main body, of the connecting opening and vertically extends out of the connecting opening until entering the upper side of the mounting cavity; the shielding sleeve is sleeved on the periphery of the section, extending out of the connecting opening, of the upper conductive terminal and extends out of the lower end surface of the upper conductive terminal along the vertical direction; the lightning arrester core body is arranged in the mounting cavity and is in close contact with the lower end surface of the upper conductive terminal; and the lower conductive terminal is arranged in the mounting cavity and is in close contact with the lower end surface of the lightning arrester core body, and the lower conductive terminal is in close joint with the vertical shell and can be separated from the vertical shell when high-pressure gas is generated in the vertical shell due to high-pressure current.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to explosion-proof surge arresters for switchgear and switchgear having the same. Background Technology

[0002] Switchgear, such as switch cabinets or transformers, is widely used in power plants, substations, industrial and mining enterprises, and residential communities due to its high safety and compact structure. It includes the switchgear body and surge arresters connected in parallel with it to protect the switchgear body from transient overvoltages. Under normal operating voltage, the surge arrester exhibits high resistance, allowing only microamps or milliamps of current to pass through; under high voltage, it exhibits low resistance, guiding the high-voltage current to ground. This method protects the switchgear body from lightning strikes and switching shocks. However, existing surge arresters are typically constructed as thermal explosion arresters to ensure rapid separation from the switchgear body. This obviously results in high temperatures and ejected debris, posing significant safety hazards to personnel and electrical equipment in the operating environment.

[0003] Therefore, there is a demand in this field for explosion-proof surge arresters with high safety. Utility Model Content

[0004] The present invention aims to provide an explosion-proof surge arrester that can at least solve some of the problems mentioned above.

[0005] This utility model also aims to provide a switching device that applies the above-mentioned improved explosion-proof surge arrester.

[0006] According to one aspect of the present invention, an explosion-proof surge arrester for a switchgear is provided. The switchgear includes a switchgear body disposed on a lateral side of the explosion-proof surge arrester. The explosion-proof surge arrester includes: a surge arrester housing, which includes a lateral housing and a vertical housing extending vertically from the lateral housing. The lateral housing has a connection opening extending laterally from the lateral side adjacent to the switchgear body away from the switchgear body. The vertical housing has a mounting cavity extending vertically. An upper conductive terminal is disposed on the lateral side of the connection opening away from the switchgear body and extends vertically beyond the connection opening until... The upper side of the mounting cavity includes: a shielding sleeve fitted onto the upper conductive terminal, extending beyond the outer periphery of the connection opening and vertically extending beyond the lower end face of the upper conductive terminal; a surge arrester core disposed within the mounting cavity and in close contact with the lower end face of the upper conductive terminal, such that the upper end face of the surge arrester core is located within the shielding sleeve; and a lower conductive terminal disposed within the mounting cavity and in close contact with the lower end face of the surge arrester core, the lower conductive terminal being tightly engaged with the vertical housing and configured to disengage from the vertical housing when high-pressure gas is generated within the vertical housing due to high-voltage current.

[0007] Compared with existing technologies, the explosion-proof surge arrester in this invention is connected laterally to the main body of the switchgear, while the surge arrester core, which may generate high-temperature and high-pressure gas, is arranged vertically perpendicular to the lateral direction. This minimizes the impact of high-temperature and high-pressure gas on the lateral housing and components within the connection opening. Furthermore, the shielding sleeve not only improves the electric field distribution at the connection between the upper conductive terminal and the surge arrester core, but also, by arranging the connection end face of the upper conductive terminal and the surge arrester core within the shielding sleeve, prevents impact on the lateral housing when high-temperature and high-pressure gas is generated and directs the high-temperature and high-pressure gas into the mounting cavity. This allows the lower conductive terminal to be ejected downwards from the vertical housing under the impact of the high-temperature and high-pressure gas. Both the surge arrester core, which is pressed against the upper conductive terminal, and the high-temperature and high-pressure gas can be ejected downwards from the vertical housing, thus avoiding lateral impact on both the lateral and vertical housings, and consequently preventing possible pulverizing and shattering of the vertical housing.

[0008] Preferably, the upper conductive terminal is provided with a connection hole that extends laterally to connect with the connection opening, and the explosion-proof surge arrester further includes a conductive rod disposed in the connection opening and electrically connected to the upper conductive terminal via the connection hole.

[0009] Preferably, the surge arrester housing and the shielding sleeve are integrally injection molded, and the upper conductive terminal is pre-embedded inside the shielding sleeve and the surge arrester housing.

[0010] Preferably, the transverse housing includes a first section and a second section located on both sides of the upper conductive terminal in the transverse direction. The first section has the connection opening, and the second section has a mounting opening extending from the transverse side away from the upper conductive terminal toward the upper conductive terminal to communicate with the connection hole.

[0011] Preferably, the diameter of the mounting opening is designed to gradually decrease from the lateral side away from the upper conductive terminal toward the upper conductive terminal, and the outer diameter of the second segment gradually increases from the lateral side away from the upper conductive terminal toward the upper conductive terminal.

[0012] Preferably, the explosion-proof surge arrester further includes a connecting rod that passes through the connection hole from the mounting opening to connect with the conductive rod, and an insulating component for closing the mounting opening.

[0013] Preferably, the lower conductive terminal includes a conductive portion for close contact with the lower end face of the surge arrester core and an engagement protrusion protruding from the outer periphery of the conductive portion.

[0014] Preferably, the surge arrester housing is made of an elastic insulating material, and the lower conductive terminal is made of a material with a hardness higher than that of the surge arrester housing, so that when the lower conductive terminal is connected to the surge arrester housing with an interference fit, an engagement groove conforming to the engagement protrusion is formed on the surge arrester.

[0015] Preferably, the engagement protrusion includes a stop surface extending straight from the conductive portion and a guide slope extending upward from the stop surface to the conductive portion.

[0016] According to another aspect of the present invention, a switching device is also provided, the switching device comprising a switching device body and an explosion-proof surge arrester arranged on the lateral side of the switching device body, the explosion-proof surge arrester being the aforementioned explosion-proof surge arrester.

[0017] Other features and advantages of this invention will partly be apparent to those skilled in the art upon reading this application, and partly will be described below in conjunction with the accompanying drawings in the detailed description. Attached Figure Description

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0019] Figure 1 This is an application diagram of the explosion-proof surge arrester according to this utility model;

[0020] Figure 2 yes Figure 1 A partially enlarged schematic diagram of area A of the explosion-proof surge arrester;

[0021] Figure 3This is a cross-sectional view of the explosion-proof surge arrester according to this utility model;

[0022] Figure 4 This is an exploded view of the explosion-proof surge arrester according to this utility model;

[0023] Figure 5 This is a partially enlarged schematic diagram of area B of the explosion-proof surge arrester according to this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10-Explosion-proof surge arrester; 11-Surge arrester housing; 111-Horizontal housing; 111a-Connection opening; 111b-First section; 111c-Second section; 111d-Mounting opening; 112-Vertical housing; 112a-Mounting cavity; 112c-Mating groove; 12-Upper conductive terminal; 121-Connecting hole; 13-Shielding sleeve; 14-Surge arrester core; 15-Lower conductive terminal; 151-Conductive part; 152-Mating protrusion; 152a-Stop surface; 152b-Guiding slope; 16-Conductive rod; 17-Additional shielding sleeve; 181-Grounding bolt; 182-Grounding wire; 19-Insulating jacket; 191-Grounding connector; 20-Connecting component. Detailed Implementation

[0026] The schematic scheme of the explosion-proof surge arrester for switchgear disclosed in this utility model is now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0027] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0028] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0029] The terms "joining", "connection" and similar terms used in this utility model include both indirect connection of two components with the aid of an intermediate layer such as an adhesive or welding agent or an intermediate component such as a connector or transition piece, and direct connection of two components without the aid of any intermediate layer such as an adhesive or welding agent or an intermediate component such as a connector or transition piece.

[0030] Figures 1 to 5 An example of the explosion-proof surge arrester 10 of this utility model is shown. In this example, the explosion-proof surge arrester 10 can be transmitted via... Figure 1 The connecting component 20, located on the right-hand side of the explosion-proof surge arrester 10, connects to the main body of the switchgear (not shown), thereby connecting the explosion-proof surge arrester 10 to the main body of the switchgear via the connecting component 20 to protect the main body of the switchgear in the event of lightning strikes and operational shocks, thus improving the reliability of the switchgear. It is understood that "lateral" as used herein refers to... Figure 1 The left and right directions and the "vertical" direction of the page are attached. Figure 1 The vertical direction of the page.

[0031] Combination Figure 1 and Figure 2 As shown, the explosion-proof surge arrester 10 may include a surge arrester housing 11, an upper conductive terminal 12, a shielding sleeve 13, a surge arrester core 14, and a lower conductive terminal 15.

[0032] Specifically, the surge arrester housing 11 may include a transverse housing 111 and a vertical housing 112 that generally fit together to form a T-shape. The vertical housing 112 may extend vertically downward from approximately the middle of the transverse housing 111 to connect to the switchgear body in the transverse direction via the transverse housing 111. Conductive components such as the surge arrester core 14 are arranged vertically perpendicular to the transverse direction within a vertically extending mounting cavity 112a in the vertical housing 112 to minimize impact on the switchgear body. The transverse housing 111 may have a connection opening 111a extending laterally from the transverse side adjacent to the switchgear body away from the switchgear body, i.e., a connection opening 111a extending from the right side of the transverse housing 111 to the left, for adapting and connecting with the connection component 20.

[0033] The upper conductive terminal 12 can be arranged within the transverse housing 111 and located on the transverse side, i.e., the left side, away from the main body of the switchgear, of the connection opening 111a. The upper conductive terminal 12 extends vertically downwards from the upper side of the connection opening 111a to the lower side of the connection opening 111a and continues vertically downwards until it protrudes from the transverse housing 111, such that the lower end of the upper conductive terminal 12 enters the upper side of the mounting cavity 112a of the vertical housing 112. (Combined) Figure 2As shown, the shielding sleeve 13 can be fitted onto the outer periphery of the portion of the upper conductive terminal 12 that extends beyond the connection opening 111a. In particular, the shielding sleeve 13 extends vertically downward beyond the lower end face of the upper conductive terminal 12, so that the portion of the upper conductive terminal 12 that extends beyond the connection opening 111a is completely located inside the shielding sleeve 13.

[0034] For example, the insulating jacket 19 can be injection molded from an insulating material, the shielding sleeve 13 can be integrally injection molded from a semiconductor material and the insulating jacket 19, and the upper conductive terminal 12 can be pre-embedded inside the transverse housing 111 and the shielding sleeve 13. This not only improves production efficiency and simplifies subsequent installation steps, but also improves the sealing of the upper side of the mounting cavity 112a of the vertical housing 112 by constructing the insulating jacket 19, the shielding sleeve 13 and the upper conductive terminal 12 as a whole, so as to further isolate them from the transverse housing 111 and the components in the connection opening 111a.

[0035] The surge arrester core 14 can be constructed as multiple nonlinear resistive elements, such as zinc oxide resistive elements, stacked vertically, thus exhibiting a high resistance state under normal operating voltage and a low resistance state under high voltage. The surge arrester core 14 is generally constructed as a slender structure and housed within the mounting cavity 112a. Its upper end is in close contact with the lower end face of the upper conductive terminal 12, and its lower end is in close contact with the upper end face of the lower conductive terminal 15, thereby forming a discharge path from the upper conductive terminal 12, the surge arrester core 14, and the lower conductive terminal 15.

[0036] Specifically, the upper end face of the surge arrester core 14 and the upper conductive terminal 12 are generally constructed as flat surfaces in close contact with each other, thereby allowing the contact surface between the surge arrester core 14 and the upper conductive terminal 12 to be located within the shielding sleeve 13, thus improving the electric field at the contact point. Furthermore, the surge arrester core 14 generates heat when carrying high-voltage current, producing high-temperature and high-pressure gas within the mounting cavity 112a. The arrangement of the upper end face of the surge arrester core 14 within the shielding sleeve 13 further isolates the high-temperature and high-pressure gas from the transverse housing 111 and guides the high-temperature and high-pressure gas into the mounting cavity 112a.

[0037] The lower conductive terminal 15 can be installed on the lower side of the mounting cavity 112a and tightly engaged with the vertical housing 112. This allows the arrester core 14 to be pressed against the upper conductive terminal 12 while connected to the vertical housing 112, thus forming a reliable electrical connection between the upper conductive terminal 12, the arrester core 14, and the lower conductive terminal 15. The engagement between the lower conductive terminal 15 and the vertical housing 112 is also configured to disengage from the vertical housing 112 when high-temperature, high-pressure gas is generated within it. This allows the lower conductive terminal 15 to be ejected downwards from the vertical housing 112 under the influence of the high-temperature, high-pressure gas. Subsequently, the high-temperature, high-pressure gas in the mounting cavity 112a and the arrester core 14 can be released directionally from the lower side of the vertical housing 112, thereby preventing the vertical housing 112 from exploding under high-temperature, high-pressure gas and preventing possible ejection of debris. This significantly improves the safety of the explosion-proof arrester 10.

[0038] Optionally, combined Figure 1 and Figure 2 As shown, the portion of the upper conductive terminal 12 opposite to the connection opening 111a may be provided with a transversely penetrating connection hole 121. The connection hole 121 communicates with the connection opening 111a, so that a connecting rod, such as a screw, can be connected to the conductive rod 16, such as a conductive copper rod, inside the connection opening 111a through the connection hole 121. Thus, a reliable electrical connection is formed between the conductive rod 16, which is electrically connected to the connecting component 20, and the upper conductive terminal 12.

[0039] Optionally, combined Figure 1 and Figure 2 As shown, the transverse housing 111 may include a first section 111b and a second section 111c in the transverse direction, wherein the first section 111b is located on the right side of the upper conductive terminal 12 in the transverse direction, and the second section 111c is located on the left side of the upper conductive terminal 12 in the transverse direction. The first section 111b may be provided with a connection opening 111a for accommodating the conductive rod 16, and the second section 111c may be provided with a mounting opening 111d for accommodating the insulating component.

[0040] Further integration Figure 3 As shown, the connection opening 111a extends with a substantially constant diameter to accommodate the conductive rod 16, which has a substantially constant outer diameter. The diameter of the mounting opening 111d gradually decreases from the right side to the left, forming a flare on the right side of the mounting opening 111d to facilitate the insertion of an insulating component and close the mounting opening 111d. The outer diameter of the second segment 111c gradually increases from the right side to the left, which not only reduces the overall material required for the second segment 111c and lowers costs, but also allows for a longer creepage distance compared to a horizontally inclined outer surface compared to a horizontally straight outer surface, thereby reducing the lateral dimension of the surge arrester housing 11 in this invention.

[0041] Optionally, such as Figure 3 As shown, the surge arrester housing 11 may also include an additional shielding sleeve 17, which is located within the transverse housing 111 between the first section 111b and the second section 111c and surrounds the section opposite the upper conductive terminal 12 to the connection opening 111a, thereby improving the electric field distribution at the upper conductive terminal 12.

[0042] Optionally, combined Figures 3 to 5 As shown, the lower conductive terminal 15 may include a conductive portion 151 and an engaging protrusion 152. The conductive portion 151 may be generally formed as a cylindrical structure with a constant outer diameter. Its upper end face and the lower end face of the surge arrester core 14 are constructed to be flat surfaces in close contact with each other. Its lower end is provided with a threaded hole for connection to a grounding bolt 181. The grounding bolt 181 is in turn connected to a grounding wire 182, thereby grounding the switchgear body through the conductive rod 16, the upper conductive terminal 12, the surge arrester core 14, the lower conductive terminal 15, the grounding bolt 181, and the grounding wire 182, so as to conduct the high-voltage current to the ground.

[0043] When the surge arrester housing 11 is made of an elastic insulating material such as rubber, the lower conductive terminal 15 can be tightly installed into the mounting cavity 112a of the vertical housing 112 via an interference fit. The connection strength between the vertical housing 112 and the lower conductive terminal 15 is basically determined by the degree of compression between them. To further enhance the connection strength between the lower conductive terminal 15 and the vertical housing 112, the engagement protrusion 152 protrudes radially from the outer periphery of the conductive portion 151, thereby adapting to the engagement groove 112c on the vertical housing 112. Furthermore, the lower conductive terminal 15 is made of a material with higher hardness than the material of the surge arrester housing 11, such as metal. This allows the engagement groove 112c, which adapts to the engagement protrusion 152, to be naturally formed during the process of the vertical housing 112 returning to its original shape when the lower conductive terminal 15 is placed into the mounting cavity 112a by overcoming the elastic force and radially expanding outward, thereby further simplifying the installation steps.

[0044] Optionally, the engagement protrusion 152 of the lower conductor terminal may be designed as a barb shape relative to the conductive portion 151. It may include a stop surface 152a extending radially outward from the conductive portion 151 and a guide slope 152b extending upward from the stop surface 152a to the conductive portion 151. When the lower conductive terminal 15 is installed into the vertical housing 112, the guide slope 152b guides the lower conductive terminal 15 into the engagement groove 112c and the stop surface 152a provides a clamping force opposite to the impact force of the high temperature and high pressure gas in the mounting cavity 112a.

[0045] The extension length of the stop surface 152a from the conductive part 151 is positively correlated with the impact force of the high-temperature and high-pressure gas in the mounting cavity 112a, especially with the specification of the predetermined high-voltage current. This allows the high-temperature and high-pressure gas generated in the mounting cavity 112a to just disengage the lower conductive terminal 15 from the vertical housing 112 when the high-voltage current passes through the arrester core 14 in the mounting cavity 112a, thus ejecting the lower conductive terminal 15 downwards. The high-temperature and high-pressure gas, as well as the arrester core 14 which is pressed against the upper conductive terminal 12, can also be ejected downwards under the action of gravity. In this process, the high-temperature and high-pressure gas in the mounting cavity 112a is prevented from impacting the arrester housing 11 laterally, which could cause the arrester housing 11 to crack.

[0046] Optionally, such as Figure 3 As shown, an insulating jacket 19 made of, for example, semiconductor material can also be arranged on the surge arrester housing 11. The portion of the insulating jacket 19 adjacent to the lower conductive terminal 15 can also be provided with a grounding connector 191, so that the induced charge accumulated in the insulating jacket 19 can be guided to the ground through the grounding connector 191, thereby further improving the electric field distribution of the explosion-proof surge arrester 10 in this utility model and the protection of personnel.

[0047] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0048] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. An explosion-proof surge arrester (10) for a switchgear, the switchgear comprising a switchgear body disposed on the lateral side of the explosion-proof surge arrester (10), characterized in that, The explosion-proof surge arrester (10) includes: A surge arrester housing (11) includes a transverse housing (111) and a vertical housing (112) extending vertically from the transverse housing (111). The transverse housing (111) has a connection opening (111a) extending laterally from a transverse side adjacent to the switchgear body away from the switchgear body. The vertical housing (112) has a mounting cavity (112a) extending vertically. Upper conductive terminal (12) is arranged on the lateral side of the connection opening (111a) away from the main body of the switchgear and extends vertically beyond the connection opening (111a) until it enters the upper side of the mounting cavity (112a); A shielding sleeve (13) is fitted onto the outer periphery of the portion of the upper conductive terminal (12) that extends beyond the connection opening (111a) and extends vertically beyond the lower end face of the upper conductive terminal (12). A surge arrester core (14) is arranged in the mounting cavity (112a) and in close contact with the lower end face of the upper conductive terminal (12) so that the upper end face of the surge arrester core (14) is located inside the shielding sleeve (13). The lower conductive terminal (15) is arranged in the mounting cavity (112a) and in close contact with the lower end face of the surge arrester core (14). The lower conductive terminal (15) is tightly engaged with the vertical housing (112) and is configured to disengage from the vertical housing (112) when high-pressure gas is generated in the vertical housing (112) due to high-pressure current.

2. The explosion-proof surge arrester (10) for switchgear according to claim 1, characterized in that, The upper conductive terminal (12) is provided with a connecting hole (121) that extends laterally to connect with the connecting opening (111a). The explosion-proof surge arrester (10) also includes a conductive rod (16) arranged in the connecting opening (111a) and electrically connected to the upper conductive terminal (12) via the connecting hole (121).

3. The explosion-proof surge arrester (10) for switchgear according to claim 1, characterized in that, The surge arrester housing (11) and the shielding sleeve (13) are integrally injection molded, and the upper conductive terminal (12) is pre-embedded inside the shielding sleeve (13) and the surge arrester housing (11).

4. The explosion-proof surge arrester (10) for switchgear according to claim 2, characterized in that, The transverse housing (111) includes a first section (111b) and a second section (111c) located on both sides of the upper conductive terminal (12) in the transverse direction. The first section (111b) is provided with the connection opening (111a), and the second section (111c) is provided with a mounting opening (111d) extending from the transverse side away from the upper conductive terminal (12) toward the upper conductive terminal (12) to communicate with the connection hole (121).

5. The explosion-proof surge arrester (10) for switchgear according to claim 4, characterized in that, The diameter of the mounting opening (111d) is designed to gradually decrease from the lateral side away from the upper conductive terminal (12) toward the upper conductive terminal (12), and the outer diameter of the second segment (111c) gradually increases from the lateral side away from the upper conductive terminal (12) toward the upper conductive terminal (12).

6. The explosion-proof surge arrester (10) for switchgear according to claim 4, characterized in that, The explosion-proof surge arrester (10) also includes a connecting rod that passes through the connecting hole (121) from the mounting opening (111d) to connect with the conductive rod (16) and an insulating component for closing the mounting opening (111d).

7. The explosion-proof surge arrester (10) for switchgear according to claim 1, characterized in that, The lower conductive terminal (15) includes a conductive portion (151) for close contact with the lower end face of the surge arrester core (14) and an engagement protrusion (152) protruding from the outer periphery of the conductive portion (151).

8. The explosion-proof surge arrester (10) for switchgear according to claim 7, characterized in that, The surge arrester housing (11) is made of an elastic insulating material, and the lower conductive terminal (15) is made of a material with a hardness higher than that of the surge arrester housing (11), so that when the lower conductive terminal (15) is connected to the surge arrester housing (11) with an interference fit, an engagement groove (112c) conforming to the engagement protrusion (152) is formed on the surge arrester.

9. The explosion-proof surge arrester (10) for switchgear according to claim 8, characterized in that, The engagement protrusion (152) includes a stop surface (152a) extending straight from the conductive portion (151) and a guide slope (152b) extending upwardly from the stop surface (152a) to the conductive portion (151).

10. A switching device, the switching device comprising a switching device body and an explosion-proof surge arrester (10) arranged on a lateral side of the switching device body, characterized in that, The explosion-proof surge arrester (10) is the explosion-proof surge arrester (10) according to any one of claims 1 to 9.

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