A lightning arrester for 10KV distribution network

Abstract

The present invention provides a lightning arrester for a 10KV distribution network, relating to the technical field of lightning arresters. The lightning arrester comprises an outer shell and a core body, wherein the outer shell has a cylindrical inner cavity, and the core body is arranged in the inner cavity of the outer shell; the core body comprises: at least one zinc oxide resistor and one or two discharge chamber components. The present invention, by designing the structure of the core body and the design of the discharge chamber component, forms an open-circuit state at both ends of a column structure formed by the zinc oxide resistor and the discharge chamber component. Compared with the traditional low-energy consumption state, the problem of the lightning arrester being in a low-energy consumption state for a long time can be solved, thereby achieving energy saving. Moreover, when the line is in a high-voltage state, the pole piece inside the discharge chamber component generates a discharge effect, and the discharge chamber component is in a conducting state. The zinc oxide resistor is also in a conducting state due to its own characteristics as a resistor with nonlinear characteristics when the line is in a high-voltage state, so that the core body is in a conducting state, and the line is connected to the ground for a short time, thereby protecting the distribution components.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arresters, in particular to a lightning arrester for a 10KV distribution network. Background Art

[0002] The working principle of zinc oxide resistors is based on the nonlinear characteristics of zinc oxide materials. Under normal voltage, the potential barriers between zinc oxide grains prevent current from passing through, maintaining a high resistance state. When the voltage exceeds the threshold, these potential barriers are broken down, and the resistors quickly conduct electricity, absorbing overvoltage energy and protecting the circuit from damage. When used in distribution networks, they can play a role in lightning protection and overvoltage protection, effectively maintaining the stability of the grid voltage and avoiding damage to distribution equipment.

[0003] Although zinc oxide resistors maintain high resistance characteristics under normal voltage, they still consume power from the power grid. Large-scale, long-term cumulative use will also cause a very large power consumption in the distribution network. For this reason, the present invention provides a new type of lightning arrester for 10KV distribution network. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a lightning arrester for a 10KV distribution network, which solves the problem that the existing zinc oxide resistor type lightning arrester is used in large quantities for a long time, which also greatly affects the power consumption of the distribution network.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A lightning arrester for a 10KV distribution network, comprising: an outer shell and a core, wherein the outer shell has a cylindrical inner cavity, and the core is arranged in the inner cavity of the outer shell;

[0007] The core comprises: at least one zinc oxide resistor and one or two discharge cavity components, the zinc oxide resistor and the discharge cavity components are arranged in layers to form a columnar structure, and the two ends of the columnar structure formed by the zinc oxide resistor and the discharge cavity components are electrically connected to a first terminal and a second terminal respectively;

[0008] The first terminal and the second terminal both extend out of the inner cavity of the outer shell.

[0009] Preferably, an insulating bushing is provided on the outside of the columnar structure formed by the zinc oxide resistor and the discharge chamber assembly, and the insulating bushing is made of woven glass fiber pre-impregnated with epoxy resin.

[0010] Preferably, one of the discharge chamber components is located at the outermost end of the columnar structure formed by the zinc oxide resistor and the discharge chamber component, and the second terminal is electrically connected to the discharge chamber component.

[0011] Preferably, the discharge chamber assembly includes:

[0012] A ceramic ring member, comprising a disk body, the end of which is provided with a first hole, a second hole, and a third hole extending therethrough, wherein a plurality of the second hole and a plurality of the third hole are provided, and the second holes and the third holes are arranged in a staggered manner, a discharge hole is provided on the plate body between the second hole and the third hole, and the first hole is located on one side or both sides of the hole group formed by the second hole and the third hole;

[0013] A second pole piece and a first pole piece, wherein the second pole piece and the first pole piece are respectively located at both ends of the ceramic ring, the second pole piece is a plug-in plate corresponding to the third socket, the first pole piece comprises: a metal disc portion and a second plug-in plate portion corresponding to the second socket, an end portion of the second plug-in plate portion is fixedly connected to an end portion of the metal disc portion, and the lengths of the plug-in plate and the second plug-in plate portion of the second pole piece are both less than the length of the disc body;

[0014] A transfer member, the transfer member comprising: an annular portion and a first plug-in plate corresponding to the first socket, an end of the first plug-in plate being fixedly connected to an end of the annular portion, an end of the first plug-in plate being electrically connected to the second pole piece, the annular portion being located outside the metal disk portion, and an annular gap being formed between the annular portion and the metal disk portion;

[0015] An insulating pad, which is annular and fixedly connected to one end of the annular portion away from the ceramic ring;

[0016] The thermal deformation member includes: an annular body and a contact folding plate member, wherein the annular body is fixedly connected to the outer side of the metal disk portion, the contact folding plate member is integrally fixedly arranged on the outer contour of the annular body, and a plurality of contact folding plate members are arranged along the circumferential direction of the annular body;

[0017] The second pole piece, the first pole piece, the transfer piece, and the thermal deformation piece are all metal components.

[0018] Preferably, the second terminal comprises: a first metal ring, the second pole piece is fixedly connected to the end of the first metal ring, and an end of the first metal ring away from the second pole piece is fixedly connected to a first threaded column.

[0019] The present invention provides a lightning arrester for a 10KV distribution network. It has the following beneficial effects:

[0020] 1. The present invention, by designing the structure of the core, has at least one zinc oxide resistor and one or two discharge chamber components. The zinc oxide resistor and the discharge chamber components are layered and distributed to form a columnar structure. The two ends of the columnar structure formed by the zinc oxide resistor and the discharge chamber component are electrically connected to the first terminal and the second terminal respectively. The design of the discharge chamber component makes the two ends of the columnar structure formed by the zinc oxide resistor and the discharge chamber component form an open circuit state. Compared with the traditional low-energy consumption state, it can solve the problem of the lightning arrester being in a low-energy consumption state for a long time, thereby achieving energy saving. Moreover, when the line carries a high voltage state (lightning strike or overvoltage), the pole piece inside the discharge chamber component produces a discharge effect, and the discharge chamber component is in a conductive state. The zinc oxide resistor is also in a conductive state when the line carries a high voltage state due to its own characteristics as a nonlinear resistor, so that the core is in a conductive state, and the line is connected to the ground for a short time, thereby protecting the distribution components.

[0021] 2. The present invention specifically designs a specific structure of a discharge chamber assembly, which includes a ceramic ring, a second pole piece, a first pole piece, a transfer piece, a thermal deformation piece, and an insulating pad, so that the discharge chamber assembly has two states. In the first state (normal voltage state), the second pole piece and the transfer piece are in contact electrical connection, the first pole piece and the second pole piece are disconnected, and the first pole piece and the transfer piece are disconnected. In the second state (overvoltage / lightning strike), since the plug plate and the second plug plate portion of the second pole piece are arranged in parallel and spaced apart, and a discharge hole is provided between the plug plate and the second plug plate portion of the second pole piece, in the high voltage state, the air inside the discharge hole is broken down, causing the first pole piece to heat up, and the heat is transferred to the thermal deformation piece connected to the first pole piece. The thermal deformation piece is thermally deformed, electrically connecting the transfer piece to the first pole piece, and the second pole piece and the first pole piece are conductively connected. Moreover, during a period of time when the thermal deformation piece cools down, the second pole piece of the discharge chamber assembly is always kept in conductive connection with the first pole piece. During continuous overvoltage / lightning strikes, the lightning arrester for 10KV distribution network responds more sensitively. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of a lightning arrester for a 10KV distribution network proposed by the present invention;

[0023] Figure 2 This is a front view of a lightning arrester for a 10KV distribution network proposed by the present invention;

[0024] Figure 3 for Figure 2 Sectional view of the section line at AA;

[0025] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0026] Figure 5 for Figure 3A partial enlarged view of point C in the middle;

[0027] Figure 6 A three-dimensional view of the core of a lightning arrester for a 10KV distribution network proposed by the present invention;

[0028] Figure 7 This is an exploded view of a discharge chamber assembly of a lightning arrester for a 10KV distribution network proposed by the present invention;

[0029] Figure 8 A three-dimensional view of a ceramic ring component of a lightning arrester for a 10KV distribution network proposed by the present invention;

[0030] Figure 9 for Figure 7 A partial enlarged view of point D in the middle;

[0031] Figure 10 This is a schematic diagram of the installation of the first terminal of a lightning arrester for a 10KV distribution network proposed by the present invention.

[0032] Among them, 1. outer shell; 101. cylindrical shell; 101a. arc-shaped hole; 101b. circular hole; 102. umbrella skirt; 103. bottom cover; 2. zinc oxide resistor; 3. discharge chamber assembly; 301. transfer member; 301a. ring portion; 301b. first plug-in plate; 302. first pole piece; 302a. metal disk portion; 302b. second plug-in plate; 303. thermal deformation member; 303a. ring body; 303b. contact folding plate; 304. ceramic ring; 304a, disk body; 304b, first socket; 304c, second socket; 304d, third socket; 304e, discharge hole; 305, second pole piece; 306, insulating pad; 4, second terminal; 401, first metal ring; 402, first threaded column; 5, insulating bushing; 6, first terminal; 601, second threaded column; 602, second metal ring; 603, first nut piece; 604, operating socket; 605, sealing pad; 606, second nut piece. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] Example 1:

[0035] like Figures 1-10As shown, an embodiment of the present invention provides a lightning arrester for a 10KV distribution network, including a shell member 1 and a core body. The shell member 1 plays an insulating role and is preferably an insulating ceramic member. The shell member 1 has a cylindrical inner cavity, and the core body is fixedly arranged in the inner cavity of the shell member 1. Generally, the core body needs to include a zinc oxide resistor. The zinc oxide resistor is a resistor with nonlinear characteristics. Under normal voltage, the zinc oxide resistor maintains a high resistance state. At this time, the core body is in an open circuit state (similar to an open circuit), which does not affect the normal operation of the circuit. When high voltage or lightning strikes (lightning strikes also cause high voltage), the resistance value of the zinc oxide resistor decreases sharply, and the circuit is connected to the ground through the zinc oxide resistor, which protects other distribution components and electrical appliances in the circuit.

[0036] Under normal voltage, although the zinc oxide resistor maintains a high resistance state, it still consumes electrical energy from the power grid (low energy consumption state). In order to solve the above technical problems, the present invention designs a core structure, which specifically includes: at least one zinc oxide resistor 2, one or two discharge cavity components 3, the zinc oxide resistor 2 and the discharge cavity component 3 are layered and distributed to form a columnar structure, and the two ends of the columnar structure formed by the zinc oxide resistor 2 and the discharge cavity component 3 are electrically connected to the first terminal 6 and the second terminal 4 respectively, and the first terminal 6 and the second terminal 4 are respectively used to connect to the 10KV power distribution network. and grounding, and through the designed one or two discharge cavity components 3, the two ends of the column structure formed by the zinc oxide resistor 2 and the discharge cavity component 3 are in an open circuit state. Compared with the traditional structure composed only of the zinc oxide resistor 2, this method can solve the problem of the lightning arrester being in a low energy consumption state for a long time, thereby achieving energy saving. The first terminal 6 and the second terminal 4 both extend out of the inner cavity of the shell member 1. The shell member 1 protects at least one zinc oxide resistor 2 and one or two discharge cavity components 3 of the core. The first terminal 6 and the second terminal 4 extend out of the inner cavity of the shell member 1 to facilitate wiring.

[0037] One way is: there are two discharge cavity components 3, and the two discharge cavity components 3 are distributed at the two ends of the column structure formed by the zinc oxide resistor 2 and the discharge cavity component 3. At this time, the two discharge cavity components 3 are disconnected at the two ends of the column structure formed by the zinc oxide resistor 2 and the discharge cavity component 3.

[0038] One way is: the discharge cavity component 3 has one, and the discharge cavity component 3 is distributed at the end of the column structure formed by the zinc oxide resistor 2 and the discharge cavity component 3. At this time, the discharge cavity component 3 is disconnected at one end of the column structure formed by the zinc oxide resistor 2 and the discharge cavity component 3, which can also ensure that the core is in a circuit-breaking state, such as Figure 6 As shown in FIG, four groups of zinc oxide resistors 2 are provided, one discharge cavity assembly 3 is provided, and the zinc oxide resistors 2 and the discharge cavity assembly 3 are distributed in layers.

[0039] One way is: the discharge chamber component 3 has one, and the discharge chamber component 3 is distributed in the middle of the column structure formed by the zinc oxide resistor 2 and the discharge chamber component 3. At this time, the discharge chamber component 3 is disconnected at the middle end of the column structure formed by the zinc oxide resistor 2 and the discharge chamber component 3, which can also ensure that the core is in a circuit-breaking state.

[0040] When the line is in a high-voltage state (lightning strike or overvoltage), the pole pieces inside the discharge chamber assembly 3 produce a discharge effect, that is, the discharge chamber assembly 3 is in a conductive state. The zinc oxide resistor 2 is also in a conductive state when the line is in a high-voltage state (lightning strike or overvoltage) due to its own nonlinear characteristics. The core is in a conductive state, and the line is connected to the ground for a short time, thereby protecting the distribution components.

[0041] In one embodiment, an insulating bushing 5 is provided on the outside of the columnar structure formed by the zinc oxide resistor 2 and the discharge chamber assembly 3. The insulating bushing 5 is made of a woven glass fiber pre-impregnated with epoxy resin. The insulating bushing 5 plays a role of insulation protection, and the insulating bushing 5 tightly forms the columnar structure formed by the zinc oxide resistor 2 and the discharge chamber assembly 3 into a whole, and the structure is more stable, thereby ensuring that the lightning arrester for 10KV distribution network can bear a certain pressure and has better performance.

[0042] In one embodiment, if Figure 6 As shown in the figure, one of the discharge chamber components 3 is located at the outermost end of the columnar structure formed by the zinc oxide resistor 2 and the discharge chamber component 3, and the second terminal 4 is electrically connected to the discharge chamber component 3. This structural design enables the second terminal 4 and the discharge chamber component 3 to form a stable structure, simplifies the number of structural parts, and facilitates production and assembly.

[0043] In one embodiment, the discharge chamber assembly 3 includes: a ceramic ring 304, a second pole piece 305, a first pole piece 302, a transfer piece 301, a thermal deformation piece 303 and an insulating pad 306. The second pole piece 305, the first pole piece 302, the transfer piece 301, and the thermal deformation piece 303 are all metal components. Preferably, the second pole piece 305, the first pole piece 302, the transfer piece 301, and the thermal deformation piece 303 are made of copper to ensure that the metal components are in contact and can complete electrical conduction.

[0044] Specifically, the ceramic ring 304 includes a disk body 304a, and a first hole 304b, a second hole 304c, and a third hole 304d are formed at the end of the disk body 304a. The second hole 304c and the third hole 304d are each provided with a plurality of them, and the second holes 304c and the third holes 304d are staggered. A discharge hole 304e is formed on the plate body between the second hole 304c and the third hole 304d. The first hole 304b is located on one side or both sides of the hole group formed by the second hole 304c and the third hole 304d. Figure 8 As shown in , two groups of first sockets 304b are provided. The first sockets 304b are located on both sides of the hole group formed by the second socket 304c and the third socket 304d. The second pole piece 305 and the first pole piece 302 are respectively located at both ends of the ceramic ring 304. The second pole piece 305 is a plug-in plate corresponding to the third socket 304d. The first pole piece 302 includes: a metal disk portion 302a and a second plug-in plate portion 302b corresponding to the second socket 304c. The end of the second plug-in plate portion 302b is fixedly connected to the end of the metal disk portion 302a. The lengths of the plug-in plate and the second plug-in plate portion 302b of the second pole piece 305 are both smaller than the disk body. The length of 304a prevents the second plug-in plate portion 302b from contacting the second pole piece 305, and the plug-in plate and the second plug-in plate portion 302b of the second pole piece 305 are arranged in parallel and spaced apart. Especially at the position of the discharge hole 304e, when a high voltage is generated between the plug-in plate and the second plug-in plate portion 302b of the second pole piece 305, the current causes breakdown of the air in the discharge hole 304e, and the plug-in plate and the second plug-in plate portion 302b of the second pole piece 305 are conductive, heating the first pole piece 302 in a short time to a temperature of more than 200°C. The transfer member 301 includes: an annular portion 301a and a portion corresponding to the first plug-in hole 304b. The first plug-in plate 301b, the end of the first plug-in plate 301b is fixedly connected to the end of the annular portion 301a, the end of the first plug-in plate 301b is electrically connected to the second pole piece 305, the annular portion 301a is located on the outside of the metal disk portion 302a, and an annular gap is formed between the annular portion 301a and the metal disk portion 302a, the insulating gasket 306 is annular, and the insulating gasket 306 is fixedly connected to the end of the annular portion 301a away from the ceramic ring 304, the thermal deformation member 303 includes: an annular body 303a, a contact folding plate 303b, the annular body 303a is fixedly connected to the outside of the metal disk portion 302a, The contact folding plate member 303b is fixedly arranged on the outer contour of the annular body 303a, and multiple contact folding plate members 303b are arranged along the circumferential direction of the annular body 303a. When the first pole member 302 heats up, the temperature is conducted to the thermal deformation member 303, and the contact folding plate member 303b of the thermal deformation member 303 is deformed by the heat. The contact folding plate member 303b contacts the inner side of the annular portion 301a, thereby realizing conductive connection (the second pole member 305 contacts the transfer member 301 for conductivity, and the thermal deformation member 303 connects the transfer member 301 and the first pole member 302, that is, the second pole member 305 is conductively connected to the first pole member 302).

[0045] The characteristics of the discharge chamber assembly 3 are described below from the perspective of two states; in the first state (normal voltage state), the second pole piece 305 is in contact electrical connection with the transfer piece 301, the first pole piece 302 is disconnected from the second pole piece 305, and the first pole piece 302 is disconnected from the transfer piece 301; in the second state (overvoltage / lightning strike), since the plug plate of the second pole piece 305 and the second plug plate portion 302b are arranged in parallel and spaced apart, and a discharge hole 304e is provided between the plug plate of the second pole piece 305 and the second plug plate portion 302b, in the high voltage state, the discharge The air inside the electrical hole 304e is broken down, causing the first pole piece 302 to be heated, and the heat is transferred to the thermally deformable member 303 connected to the first pole piece 302. The thermally deformable member 303 is thermally deformed, electrically connecting the transfer member 301 with the first pole piece 302, that is, the second pole piece 305 is electrically connected to the first pole piece 302. In addition, during the period when the thermally deformable member 303 cools down, the second pole piece 305 of the discharge chamber assembly 3 is always electrically connected to the first pole piece 302. During the continuous overvoltage / lightning strike process, the lightning arrester for the 10KV distribution network responds more sensitively.

[0046] In one embodiment, the second terminal 4 includes: a first metal ring 401, a second pole piece 305 fixedly connected to the end of the first metal ring 401, and a first threaded column 402 fixedly connected to the end of the first metal ring 401 away from the second pole piece 305. The second pole piece 305 is generally a multi-piece structure, which is fixedly connected to the first metal ring 401 as a whole, and it and the second terminal 4 form an integral structure. For the entire structure, the number of independent components is reduced, which facilitates assembly in the production process, and the structure has good integrity and is more stable.

[0047] In one embodiment, the outer shell 1 includes: a cylindrical shell 101 and a bottom cover 103. One end of the cylindrical shell 101 is a closed plate and the other end is an open end. The core body can be placed into the open end of the cylindrical shell 101. An umbrella skirt 102 is provided on the outside of the cylindrical shell 101. The design of the umbrella skirt 102 prevents rainwater from flowing continuously on the surface of the cylindrical shell 101, forming a conductive state. The bottom cover 103 is fixedly installed on the open end of the cylindrical shell 101. The bottom cover 103 and the open end of the cylindrical shell 101 are preferably installed by threading.

[0048] In one embodiment, the first terminal 6 includes: a second metal ring 602, a second threaded column 601, a first nut member 603, and a second nut member 606. One end of the second metal ring 602 is fixedly connected to the second threaded column 601. The second metal ring 602 and the second threaded column 601 adopt an integral fixed structure. The first nut member 603 and the second nut member 606 are both threadedly engaged with the second threaded column 601. A circular hole 101b and an arc-shaped hole 101a are provided on the closing plate of the cylindrical shell 101. The second threaded column 601 is located on the inner side of the circular hole 101b. The first nut member 603 is located inside the cylindrical shell 101, and an operating socket 604 corresponding to the arc-shaped hole 101a is provided at the end of the first nut member 603.

[0049] After the core is installed inside the outer shell 1 and the bottom cover 103 and the column shell 101 are installed, Figure 10 As shown in the figure, the user can use a tool to rotate the first nut member 603 at the arc hole 101a, and the first nut member 603 moves upward, thereby driving the second metal ring 602 and the second threaded column 601 to move downward, so that the other end of the core body is against the inner side of the bottom cover member 103 to ensure a tight installation.

[0050] In one embodiment, a sealing gasket 605 is provided between the second nut member 606 and the outer end of the closing plate of the cylindrical shell 101. After the sealing gasket 605 and the second nut member 606 are installed, the sealing gasket 605 seals the circular hole 101b and the arc-shaped hole 101a.

[0051] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A lightning arrester for a 10KV distribution network, comprising a housing and a core, wherein the housing has a cylindrical inner cavity and the core is disposed in the inner cavity of the housing, characterized in that: The core includes: at least one zinc oxide resistor and one or two discharge cavity components. The zinc oxide resistor and the discharge cavity components are arranged in layers to form a columnar structure. The two ends of the columnar structure formed by the zinc oxide resistor and the discharge cavity components are electrically connected to a first terminal and a second terminal respectively. The first terminal and the second terminal both extend out of the inner cavity of the outer shell. The discharge chamber assembly includes: a transfer member, a first pole member, a thermal deformation member, a ceramic ring member, a second pole member and an insulating pad; The ceramic ring includes a disc body, the end of which is provided with a first hole, a second hole, and a third hole extending therethrough. The second hole and the third hole are provided in plurality, and the second holes and the third holes are arranged in an alternating manner. A discharge hole is provided on the plate body between the second hole and the third hole. The first hole is located on one side or both sides of the hole group formed by the second hole and the third hole. The transfer member includes: an annular portion and a first plug-in plate corresponding to the first plug-in hole, an end of the first plug-in plate is fixedly connected to an end of the annular portion, and the end of the first plug-in plate is electrically connected to the second pole piece. The annular portion is located outside the metal disk portion, and an annular gap is formed between the annular portion and the metal disk portion. The first pole piece includes: a metal disc portion and a second plug-in plate portion corresponding to the second plug-in hole, an end portion of the second plug-in plate portion is fixedly connected to an end portion of the metal disc portion, and the length of the plug-in plate and the second plug-in plate portion of the second pole piece are both shorter than the length of the disc body; The thermal deformation member includes: an annular body and a contact folding plate member, wherein the annular body is fixedly connected to the outer side of the metal disc portion, the contact folding plate member is integrally fixedly arranged on the outer contour of the annular body, and a plurality of contact folding plate members are arranged along the circumferential direction of the annular body; The first pole piece and the second pole piece are respectively located at two ends of the ceramic ring piece, and the second pole piece is a plug plate corresponding to the third socket; the insulating pad is annular and is fixedly connected to one end of the annular part away from the ceramic ring piece.

2. The 10KV lightning arrester for distribution network according to claim 1, characterized in that: An insulating bushing is provided on the outside of the column structure formed by the zinc oxide resistor and the discharge cavity assembly. The insulating bushing is made of woven glass fiber pre-impregnated with epoxy resin.

3. The 10KV lightning arrester for distribution network according to claim 1, characterized in that: One of the discharge chamber components is located at the outermost end of the column structure formed by the zinc oxide resistor piece and the discharge chamber component, and the second terminal is electrically connected to the discharge chamber component.

4. The lightning arrester for 10KV distribution network according to claim 1, characterized in that: The discharge chamber assembly includes: a second pole piece, a first pole piece, a transfer piece, and a thermal deformation piece, all of which are metal components.

5. The lightning arrester for 10KV distribution network according to claim 1, characterized in that: The second terminal includes a first metal ring, the second pole piece is fixedly connected to the end of the first metal ring, and one end of the first metal ring away from the second pole piece is fixedly connected to the first threaded column.

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