JP7620802B2 - Lightning surge absorber, lightning surge absorbing device, and lightning surge absorbing method - Google Patents

Description

The present invention relates to lightning protection equipment, and in particular to a lightning surge absorption technology that can absorb lightning surges in lightning surge protection equipment that includes a lightning rod, thereby protecting buildings and electrical equipment from lightning damage.

Lightning is an electrical discharge that occurs in the atmosphere, and there are various types of lightning discharge, including intracloud discharge, intercloud discharge, and cloud-to-ground discharge. It is cloud-to-ground discharge (hereafter referred to as lightning) that causes the most damage. Lightning occurs when the electric field strength between the thundercloud (cloud base) and the ground or a structure built on the ground becomes very strong, and the electric charge reaches a critical state and exceeds the dielectric breakdown strength of the atmosphere.

In recent years, as temperatures rise (global warming), the amount of saturated water vapor in the air has also increased, leading to more frequent cloud formation and more lightning strikes. At the same time, the number of electronic and electrical devices has also increased, and when lightning current flows through them, they are often damaged as a side effect. There is therefore a demand for methods to reduce the impact of lightning strikes on buildings and electronic and electrical equipment, either by suppressing lightning strikes themselves or by reducing the strength of the lightning current.

When a lightning strike occurs, if part of a structure built on the ground becomes the lightning-receiving part, an overvoltage is transiently applied to the structure, resulting in a transient overcurrent in the structure. A "lightning surge," the general term for this series of transient phenomena, can cause lightning damage, such as damage to electronic equipment installed in the structure.

As a countermeasure against lightning damage caused by lightning surges, a conventional approach has been to install surge arresters, such as surge protection elements connected to the ground wire, in the electrical systems of structures. Surge protection elements behave as nonlinear elements whose resistance value decreases in situations where an overvoltage above a threshold is applied, such as during a lightning strike. This makes it possible to implement a lightning countermeasure that bypasses overcurrent to the earth.

In addition, Patent Document 1 discloses an invention related to an overcurrent protection device. According to this invention, the overcurrent protection device is characterized by including a lightning arrester connected to equipment or facilities provided in a power generation system or a substation system, a grounding wire connected to the lightning arrester, and a discharger connected to the grounding wire and discharging the overcurrent input to the lightning arrester into the ground, the discharger having a first discharge wire and a second discharge wire that intersect only at the connection point where the grounding wire is connected.

Conventional inventions such as the invention described in Patent Document 1 aim to reduce the potential rise and potential distribution in the earth, which is the destination of the discharge of the overcurrent generated by a lightning surge. Therefore, there is room for improvement in conventional lightning countermeasures, of which the above-mentioned conventional invention is an example, in terms of absorbing the lightning surge before it is discharged to the earth by dispersing the overvoltage in a structure, part of which serves as the lightning receiving part.

JP 2019-149862 A

The present invention was made in consideration of the above-mentioned situation, and aims to provide equipment that reduces the energy of lightning currents in order to reduce damage caused by lightning strikes that generate lightning currents.

The lightning surge absorber of the present invention is characterized by having an impedance line, which converts a portion of the discharge energy of a lightning strike into thermal energy.

The lightning surge absorption device of the present invention is characterized in that it comprises an impedance line, is installed between a lightning receiving part of a building and a grounding wire, and further comprises a housing, the impedance line converts a portion of the discharge energy of the lightning strike into thermal energy, and the housing has a closed space capable of accommodating at least a portion of the impedance line.

With this configuration, the present invention allows the impedance line to share and consume the voltage and discharge energy during a lightning strike. A structural steel frame is often used as a grounding wire that carries lightning current to the ground, and an electromagnetic field caused by the lightning current is generated inside the building, which has an electromagnetic effect on all metal wiring used inside the building, such as electric wires, communication wiring, and building management wiring, which are arranged around the steel frame. In other words, an induced current flows in the opposite direction to the lightning current in these metal wirings, which causes damage to electronic and electrical equipment in the building. By converting most of the lightning current into thermal energy, the lightning current flowing through the steel frame as a grounding wire is also reduced, minimizing its effects.

The impedance line is characterized by having an electrical resistor made of a metal heating element.

With this configuration, the present invention can convert the discharge energy generated during a lightning strike into thermal energy via the metal heating element, thereby absorbing the energy of a lightning surge.
As a result, the present invention can prevent damage to electronic and electrical equipment inside the building.

The metal heating element is made of a Ni-Cr alloy.

With this configuration, the present invention can achieve a maximum operating temperature of 1100° C. in lightning protection.
As a result, the present invention can suitably realize the conversion of discharge energy into thermal energy.

The metal heating element is made of an Fe-Cr-Al alloy.

With this configuration, the present invention can achieve a maximum operating temperature of approximately 1300° C. in lightning protection.
As a result, the present invention can suitably realize the conversion of discharge energy into thermal energy.

The impedance line is characterized by having an electrical resistor made of a non-metallic heating element.

With this configuration, the present invention can convert discharge energy into thermal energy via the non-metallic heating element and absorb a lightning surge.
As a result, the present invention can prevent damage to the wind power generation facility.

The non-metallic heating element is made of ceramics whose main component is SiC.

With this configuration, the present invention can achieve a maximum operating temperature of approximately 1600° C. in lightning protection.
As a result, the present invention can suitably realize the conversion of discharge energy into thermal energy.

The non-metallic heating element is made of ceramics whose main component is graphite.

By adopting such a configuration, the present invention can use, for example, a graphite electrode member as an electrical resistor, thereby realizing an impedance line that has high thermal conductivity, excellent heat resistance, and is resistant to impacts.

The impedance line is characterized by having an electrical resistor made of powder attached to an insulator.

By adopting such a configuration, the present invention can improve the manufacturability, including the maintainability, of the impedance line.

The electrical resistor is characterized in that the powder containing a nonlinear resistor is provided on the insulator.

With this configuration, the present invention can realize an impedance line whose resistance value is constant in a low voltage region but decreases when the voltage is equal to or higher than a predetermined threshold voltage.
As a result, the present invention can improve surge absorption characteristics against lightning strikes.

The nonlinear resistor is characterized by being made of ceramics whose main component is ZnO.

With this configuration, the present invention can realize a nonlinear resistor having a double Schottky barrier at low cost and with excellent manufacturability.
As a result, the present invention can realize an impedance line whose resistance value is constant in a low voltage region but decreases when the voltage is equal to or higher than a predetermined threshold voltage.

The insulator is characterized by being made of a supporting insulating tube.

By adopting such a configuration, the present invention makes it possible to construct an impedance line in which the above-mentioned electric resistor is enclosed as an assembly of unit structures.
As a result, the present invention can be realized in a form excellent in manufacturability that enables a series-parallel circuit to be easily constructed for the impedance line.

The impedance line is characterized in that it has an element in which a coil is connected in parallel to an electrical resistor.

With this configuration, the present invention can realize an impedance line by winding a coil, which is an inductor, around an electric resistor, for example.
Furthermore, with this configuration, the present invention can realize an impedance line in which the electrical resistance becomes dominant in the high frequency range.
As a result, the present invention can realize an impedance line having an excellent surge absorbing effect in a compact form with excellent manufacturability.

The impedance line is characterized by having an element in which multiple electrical resistors are adjacent to each other in a non-contact manner with a gap between them.

With this configuration, the present invention makes it possible to introduce into the impedance line an element including an electric resistor that becomes conductive via a discharge gap when an excessive voltage is generated by a lightning strike.
As a result, the present invention can realize an excellent surge absorption effect by introducing an electric resistor having nonlinearity into an impedance line, regardless of the material.

The impedance line is characterized in that the elements are connected in series and parallel in multiple stages.

By adopting such a configuration, the present invention can improve the withstand voltage and discharge capacity.

The housing has electrically insulating inlet and outlet terminals on both the inside and outside of the housing, and an electrically insulating separator is provided inside the housing, and the separator is capable of accommodating the impedance line that is brought into the housing via the inlet terminal and brought out to the outside of the housing via the outlet terminal.

This configuration makes it possible to realize a lightning surge absorbing device in which a long lightning surge absorber is housed in a single housing that is easy to handle.

The impedance line is flexible, and the separator can be installed inside the housing while shielding adjacent portions of the impedance line from each other.

This configuration makes it possible to prevent discharge in a long lightning surge absorber that is bent and stored in a single housing.

The separator is made of ceramic.

By using this type of configuration, the separator made of a material with excellent electrical insulation and heat resistance can be used to deal with heat generation and discharge from the lightning surge absorber.

The lightning surge absorption method of the present invention is characterized by converting a portion of the discharge energy of a lightning strike into thermal energy in an impedance line installed between the lightning receiving unit and the ground wire.

The present invention provides equipment that reduces the energy of lightning currents in order to reduce damage caused by lightning strikes that generate lightning currents.

The lightning surge absorber of the present invention is placed on top of buildings, steel towers, or other structures that require lightning protection measures, and is intended to reduce the energy of the lightning current that strikes the lightning rod by converting it into thermal energy before it flows to the ground, thereby reducing the electromagnetic effects on the area around the lightning conductor. The element that absorbs the lightning current is housed in an explosion-proof metal box, and the area around the device is designed to be unaffected by the thermal energy generated inside.

FIG. 1 is a schematic diagram of a building according to one embodiment. 1 is an external view of a lightning surge absorber according to a first embodiment. FIG. 1 is an internal view of a lightning surge absorber according to a first embodiment. FIG. 1 is an internal view of a lightning surge absorber according to a first embodiment. FIG. FIG. 7 is an internal view of a lightning surge absorber according to a second embodiment. FIG. 7 is an internal view of a lightning surge absorber according to a second embodiment. 1 is a schematic diagram of a lightning surge absorber according to one embodiment; 1 is a schematic diagram of a lightning surge absorber according to one embodiment; 1 is a schematic diagram of a lightning surge absorber according to one embodiment; 1 is a schematic diagram of a lightning surge absorber according to one embodiment;

This specification describes in detail one embodiment of the present invention below. Note that the configuration of one embodiment of the present invention will be described by showing not only the components that realize the action and effect, but also the process of making the components realize the action and effect, as appropriate, with regard to the action and effect realized by the components.

<Lightning surge absorption device>
The lightning surge absorber 100 according to one embodiment includes a lightning surge absorber including an impedance line 8 .

As illustrated in FIG. 1, the lightning surge absorbing device 100 is installed between the lightning receiving part 9 on the roof of the building 0 on the ground E and the ground wire 11. At this time, the lightning surge absorbing device 100 may be placed, for example, near the lightning receiving part 9, on the roof of the building 0, or stored inside the building 0, and there is no restriction on the manner of installation. The building 0 in one embodiment is, for example, a wind power generation facility, and there is no restriction on the manner of installation.

In one embodiment, the lightning surge absorbing device 100 further includes a housing 101 in addition to a lightning surge absorber including an impedance line 8.

The lightning surge absorber 100 in one embodiment may take the form of a blade that constitutes a wind power generation facility, for example, and there are no restrictions on its size and shape.

As shown in Figures 2 to 6, the housing 101 according to one embodiment has a closed space capable of housing at least a portion of one impedance line 8. Here, the housing 101 may be provided with appropriate holes for ventilation.

In one embodiment, the impedance lines 8 are bent within the housing 101 so that the separators 105 are positioned between adjacent impedance lines 8.

This makes it possible to prevent discharge between the impedance lines 8 in the long impedance lines 8 that are bent and stored inside the housing 101.

There are no limitations on the dimensions of the separator 105 in one embodiment, and as an example, it is about 5 cm wide, 7 cm high, and 1 m long.

First Embodiment
As illustrated in Figures 2, 3 and 4, the housing 101 according to the first embodiment may include electrically insulating lead-in terminals 102 and lead-out terminals 103 on the inside and outside of the housing 101, an electrically insulating separator 105 inside the housing 101, and a stand 104 as appropriate.

This allows the lightning surge absorber 100 to prevent sparks generated from the impedance line 8 from leaking outside the lightning surge absorber 100.

There are no limitations on the materials of the housing 101 and the stand 104 in the first embodiment, and they may be ceramics or metal materials such as steel.

The separator 105 according to the first embodiment is capable of installing an impedance line 8 that is pulled into the housing 101 via the inlet terminal 102 and pulled out to the outside of the housing 101 via the outlet terminal 103.

The lead-in terminal 102 and lead-out terminal 103 in the first embodiment may be reinforced with insulation, and there are no restrictions on their material or location on the surface of the housing 101.

The separator 105 according to the first embodiment is capable of installing a flexible and bent impedance line 8 inside the housing 101 while shielding parts of the impedance lines 8 that are adjacent to each other.

The separator 105 in the first embodiment may be made of ceramics, pottery, or may be made of an electrically insulating material used in electric wires and steel towers, and there is no restriction on the material as long as it is an electrically insulating and heat resistant material.

The separator 105 according to the first embodiment may be an assembly of separators 105, which are unit structures having a trough-shaped cross-sectional shape, as illustrated in FIG. 3. In this case, the separator 105 may be formed by stacking the unit structures of the separator 105. Here, the cross-sectional shape of the separator 105 may be trough-shaped, comb-shaped, or concave, as long as it is a cross-sectional shape in which the impedance line 8 can be installed. Note that the rectangular structures having a trough-shaped cross-sectional shape in FIG. 3 and the like correspond to the separator 105, including those not designated with a reference symbol.

As shown in FIG. 4, in the first embodiment, one impedance line 8 is bent and stored in a closed space inside the housing 101. Here, there is no restriction on the manner or route of bending the impedance line 8.

Second Embodiment
As in the first embodiment, the housing 101 of the second embodiment may also include electrically insulating lead-in terminals 102 and lead-out terminals 103 on the inside and outside of the housing 101, an electrically insulating separator 105 inside the housing 101, and a stand 104 as appropriate, as illustrated in Figures 5 and 6.

In the second embodiment, one impedance line 8 stored in the closed space inside the housing 101 is composed of an I-shaped linear impedance line 81, which is part of the impedance line 8, and a U-shaped curved impedance line 82, which is part of the impedance line 8.

In the impedance line 8 according to the second embodiment, the linear impedance line 81 and the curved impedance line 82 have a male-female tapered structure and may be fastened to each other by bolts or the like as appropriate, with no particular restrictions on the manner of connection.

Lightning surge absorber
The impedance line 8 according to one embodiment includes an electric resistor 10 .
The electrical resistor 10 consists of a metal heating element 10a (not shown) and may be in the form of a foil, wire, strip, or flat braid, with no restrictions on its shape, and may be provided with a round or L-shaped terminal at its tip for connection.
The metal heating element 10a is made of a heating wire material selected from the group including Fe, Cr, Al, Cu, Ni, Cu-Ni alloy, Cu-Mn alloy, Ni-Al alloy, Ni-Cr alloy, and Fe-Cr-Al alloy, and there is no limitation on the material.

In this way, the impedance line 8 converts a portion of the discharge energy propagating through the lightning receiving portion 9 into thermal energy through the Joule effect via the electrical resistor 10 provided in the impedance line 8.

In this way, the impedance line 8 can share the voltage and discharge energy during a lightning strike with the grounding line 11, dispersing the heat generation points during a lightning strike.

In this way, the reduction in the voltage borne by the electrical resistor 10, which is caused by the small resistance value, and the associated reduction in the surge absorption effect are avoided.

In this way, an increase in the voltage drop of the electrical resistor 10 caused by a large resistance value and the associated discharge within the lightning surge absorber 100 are avoided.

The impedance line 8 according to one embodiment includes an electric resistor 10 .
As shown in FIG. 7, the electric resistor 10 is formed by enclosing a non-metallic heating element 10b in an insulator 10c instead of a metallic heating element 10a, and may be provided with round or L-shaped terminals at its tip, and may be connected to each other via a spring.
The non-metallic heating element 10b is made of ceramics containing as its main component a material selected from the group including SiC, MoSiO ₂ , and ZrO ₂ , and may be in the form of a powder or a sintered body, with no limitations on the material.
The insulator 10c is a container such as a supporting insulating cylinder capable of enclosing the non-metallic heating element 10b, and there is no limitation on its shape, size, or material, and it may be flexible.

The non-metallic heating element 10b may be made of ceramics whose main component is graphite and may take the form of a graphite electrode.

In this way, by forming the impedance line 8 using an electrical resistor 10 in which a non-metallic heating element 10b is encapsulated in an insulator 10c, the non-metallic heating element 10b is more difficult to process than the metallic heating element 10a, and the manufacturing process, including the maintainability, can be improved when forming the impedance line 8, and a higher temperature range can be handled than when a metallic heating element 10a is used.

Additionally, the impedance line 8 may be made of a non-metallic heating element 10b that is not enclosed in an insulator 10c.
The non-metallic heating element 10b may be a flexible conductive structure such as a conductive gel, a conductive rubber, or a conductive elastomer.

The impedance line 8 according to one embodiment includes an electric resistor 10 .
As shown in FIG. 8, the electric resistor 10 is formed by enclosing a non-metallic heating element 10d in an insulator 10c, instead of the non-metallic heating element 10b.
The non-metallic heating element 10d is made of ceramics whose main component is a non-linear resistor material selected from a group including ZnO, and may be a powder, a sintered body, or a porous body, with no restrictions on the materials and ratios.

In this way, the resistance value remains constant in the low voltage region, but decreases above a certain threshold. During a lightning strike, part of the discharge energy is converted into thermal energy for voltages above the certain threshold, improving the surge absorption effect.

The impedance line 8 according to one embodiment includes an electric resistor 10 .
The electric resistor 10 is formed by enclosing a non-metallic heating element 10e in an insulator 10c, instead of the non-metallic heating element 10b.
The non-metallic heating element 10e is a liquid resistor such as seawater.
The insulator 10c is a flexible container such as a hose, and there is no limitation on its shape or size.

In this way, the electrical resistor 10 is formed in a form that is easy to manufacture by using seawater, which is a non-metallic heating element 10e that has excellent transportability.

The impedance line 8 according to one embodiment includes an electric resistor 10 .
The electric resistor 10 is formed by applying the non-metallic heating element 10b or 10d to an insulator 10f instead of the insulator 10c.
The insulator 10f is a cloth such as a nonwoven fabric, and there is no limitation on the material and composition thereof.

In this way, by applying the non-metallic heating element 10b or 10d to the cloth-like insulator 10f, an electrical resistor 10 is formed in a form that is easy to manufacture.

As shown in FIG. 9 , an impedance line 8 according to one embodiment includes an element 16 formed by connecting a coil 15 in parallel to an electrical resistor 10 according to one embodiment, and the elements 16 are connected in multiple stages in series-parallel (series and/or parallel).
The coil 15 is made of, for example, a metal material, and there is no limitation on the material and dimensions thereof.
The element 16 is formed by winding a coil 15 around an electric resistor 10 , and an inductor such as the coil 15 is connected in parallel to the electric resistor 10 .

In this way, an impedance line 8 is realized in which the electrical resistance R is dominant in the high frequency range, based on an inflection point determined based on the electrical resistance R of the electrical resistor 10 constituting one or more elements 16 and the reactance L of the coil 15 constituting one or more elements 16.

This allows the impedance line 8 to flexibly adjust and design the surge absorption characteristics according to the frequency of lightning strikes.

As shown in FIG. 10, an impedance line 8 according to one embodiment includes an element 16 formed by a plurality of electrical resistors 10 adjacent to each other in a non-contact manner with gaps 10g therebetween.
The element 16 is provided in place of a down conductor, and is formed by alternately arranging electrical resistors 10 and gaps 10g inside a tube 10h such as a hose having flexibility and a hollow structure. There is no restriction on the diameter of the tube 10h.
The electric resistor 10 has a cylindrical shape and may be formed, for example, by sealing a non-metallic heating element 10b such as SiC powder in a cylindrical insulator 10c, with no limitations on the size and quantity.
The gap 10g is, for example, 0.1 mm to 5.0 mm, there is no limit to its length, it may be a microgap, and its atmosphere may be an air atmosphere, an Ar atmosphere, or a reduced pressure atmosphere, and there are no limits to its details.

As a result, when an excessive voltage exceeding a predetermined threshold is generated by a lightning strike, the impedance line 8 becomes conductive through the discharge gap, and by converting part of the discharge energy into thermal energy, it is possible to achieve an excellent surge absorption effect.

This also makes it possible to standardize the dimensions of the individual electrical resistors 10 that make up the element 16, and by designing the element based on the discharge gap, it is possible to realize a scalable impedance line 8, allowing the impedance line 8 to be made longer.

This also prevents deterioration due to discharge in the individual electrical resistors 10 that make up the element 16, and also disperses heat among the individual electrical resistors 10, thereby achieving a longer life for the impedance line 8.

This also makes it possible to design a circuit that shorts out the individual gaps 10g that make up the element 16, allowing for more flexible adjustment of the operating characteristics of the impedance line 8 against lightning surges and improving manufacturability.

The electrical resistor 10 has semicircular electrodes 10t at both ends, and the semicircular electrodes 10t are aligned with each other.

This makes it easier to center the cylindrical electrical resistor 10, facilitating installation and enabling the realization of an impedance line 8 with excellent manufacturability.

Moreover, the electrical resistor 10 may be configured such that, instead of the semicircular electrode 10t, the electrodes 10t are aligned in a concave or convex shape.
There is no limitation on the shape of the electrode 10t as long as the shape facilitates alignment of the electrode 10t.

The element 16 constituting the impedance line 8 may be formed by winding a coil 15 around a tube 10h inside which multiple electrical resistors 10 are adjacent to each other in a non-contact manner with a gap 10g between them.

This makes it possible to achieve surge absorption effects that make full use of the conduction phenomenon caused by the discharge gap, as well as surge absorption characteristics that make full use of the frequency characteristics resulting from the inductance of coil 15, thereby reducing the impact of damage caused by lightning strikes on building 0.

In one embodiment of the present invention, the resistance and inductance of the impedance line 8 may be appropriately set so that the impedance line 8 is a collection of unit elements that exhibits an impedance of 0.1 to 1.0 kΩ at 100 kHz, which is a typical value of the line pulse.

In one embodiment of the present invention, the impedance line 8 may be formed by dividing an even number of resistance wires into right- and left-handed windings around an insulating tube.

At least one of the structures in one embodiment of the present invention is heat resistant.

In one embodiment of the present invention, a configuration may be adopted in which parts of the configurations of the above-mentioned embodiments are adopted together as appropriate.

The impedance line 8 according to one embodiment of the present invention is not limited in its dimensions. As an example, the impedance line 8 is 25 m.

In one embodiment, the lightning surge absorption method converts part of the discharge energy of a lightning strike into thermal energy in an impedance line 8 installed between the lightning receiving unit 9 and the grounding wire 11.

The present invention can effectively prevent damage to buildings 0 caused by lightning strikes.

0: Building 8: Impedance line 9: Lightning receiving portion 10: Electric resistor 10a: Metal heating element 10b: Non-metal heating element 10c: Insulator 10d: Non-metal heating element 10e: Non-metal heating element 10f: Insulator 10g: Gap 10h: Pipe 11: Ground wire 15: Coil 16: Element E: Ground 81: Straight impedance line 82: Curved impedance line 100: Lightning surge absorber 101: Housing 102: Lead-in terminal 103: Lead-out terminal 104: Base 105: Separator

Claims (18)

A lightning surge absorber comprising:
An impedance line is provided which converts a part of the discharge energy of the lightning into thermal energy ,
A lightning surge absorber , wherein the impedance line includes an element formed by a plurality of electrical resistors adjacent to each other in a non-contact manner with a gap therebetween . The lightning surge absorber according to claim 1, characterized in that the impedance line is provided with an electrical resistor made of a metal heating element. The lightning surge absorber according to claim 2, characterized in that the metal heating element is made of a Ni-Cr alloy. The lightning surge absorber according to claim 2, characterized in that the metal heating element is made of an Fe-Cr-Al alloy. The lightning surge absorber according to claim 1, characterized in that the impedance line is provided with an electrical resistor made of a non-metallic heating element. The lightning surge absorber according to claim 5, characterized in that the nonmetallic heating element is made of ceramics whose main component is SiC. The lightning surge absorber according to claim 5, characterized in that the non-metallic heating element is made of ceramics whose main component is graphite. The lightning surge absorber according to claim 1, characterized in that the impedance line includes an electrical resistor made of powder provided on an insulator. The lightning surge absorber according to claim 8, characterized in that the electrical resistor is formed by providing the powder containing a nonlinear resistor on the insulator. The lightning surge absorber according to claim 9, characterized in that the nonlinear resistor is made of ceramics whose main component is ZnO. The lightning surge absorber according to any one of claims 8 to 10, characterized in that the insulator is a supporting insulating tube. The lightning surge absorber according to any one of claims 1 to 11, characterized in that the impedance line comprises an element in which a coil is connected in parallel to an electrical resistor. 13. The lightning surge absorber according to claim 1 or 12 , wherein the impedance line is formed by connecting the elements in series and parallel in multiple stages. A lightning surge absorbing device comprising the impedance line according to any one of claims 1 to 13 , the lightning surge absorbing device being installed between a lightning receiving part of a building and a grounding wire,
A lightning surge absorbing device further comprising a housing having a closed space capable of accommodating at least a portion of the impedance line. the housing includes an electrically insulating lead-in terminal and a lead-out terminal on both the inside and outside of the housing, and an electrically insulating separator is provided inside the housing;
The lightning surge absorbing device according to claim 14 , characterized in that the separator is capable of accommodating the impedance line that is pulled into the interior of the housing via the inlet terminal and pulled out to the exterior of the housing via the outlet terminal. The impedance line has flexibility,
16. The lightning surge absorber according to claim 15 , wherein the separator is capable of installing the bent impedance line while shielding parts of the impedance line adjacent to each other inside the housing. 17. The lightning surge absorber according to claim 15 , wherein the separator is made of ceramic. A method for absorbing a lightning surge, comprising installing an impedance line having an element in which a number of electrical resistors are adjacently arranged in a non-contact manner with a gap between a lightning receiving part and a ground wire, and converting a portion of the discharge energy of the lightning strike into thermal energy.