JPH0743973B2 - Lightning arrester device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention promptly grounds an abnormally high voltage caused by lightning when applied to a power transmission line, and suppresses a continuous-current arc generated thereafter. The present invention relates to a lightning arrester device for quickly extinguishing an arc and preventing a power failure due to a ground fault of a transmission line.

[Prior Art] As a conventional lightning protection insulator device of this type, for example, a tension insulator is connected to a support arm of a steel tower via a pair of left and right steel tower-side connecting metal fittings, and those tension insulators are connected to a wire side. A power transmission line is installed via metal fittings, both ends of the jumper wire are connected between both wire side connecting fittings, a lightning arrester is suspended and supported at the tip of the support arm, and a jumper wire is placed on the jumper wire. A tension-type lightning protection insulator provided with a discharge electrode on the charging side, and a discharge electrode on the ground side provided at the lower end of the protection rod so as to face the discharge electrode on the charging side with a predetermined air discharge gap. The device is known.

However, in this conventional structure of the withstand-type lightning arrester device, since the discharge electrode on the charging side having one discharge part is provided on the jumper wire, an abnormal voltage due to lightning strike is applied to the transmission line. , When the current at this time reaches the discharge electrode on the charging side via the jumper wire and is discharged in the air discharge gap between the discharge electrode on the charging side and the discharge electrode on the ground side, There is a risk that the jumper wire may be damaged by direct discharge from the neighboring jumper wire to the ground-side discharge electrode without passing through the discharge electrode.

Therefore, in the conventional tension-type lightning arrester device, an armor rod made of aluminum wire or the like is wound around the jumper wire in the vicinity of the discharge electrode on the charging side, and the discharge is made between the armor rod and the discharge electrode on the ground side. So that
It was designed to prevent the jumper wires from melting.

[Problems to be Solved by the Invention] However, in this conventional device, since the armor rod has to be wound around the jumper wire, not only is the manufacturing cumbersome and costly, but also the effect is ensured. Had to install armor rods over almost the entire jumper wire.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and an object of the invention is to provide a jumper wire, a power transmission line, etc. (collectively referred to as an electric wire) with an armor rod. It is not necessary to wind a wire, and the structure is simple and it can be manufactured at low cost. In case of a ground fault short circuit, the arc start point is fixed to the tip of the discharge part or the conductive member, and it is accompanied by the discharge. An object of the present invention is to provide a lightning protection insulator device that can reliably prevent damage to electric wires.

[Means for Solving the Problems] In order to achieve the above object, the invention according to claim 1 is
In the lightning arrester device, a pair of discharge parts having a convex arc shape toward the ground-side discharge electrode are arranged at predetermined intervals in the line direction toward the ground-side discharge electrode, and are arranged in a direction substantially orthogonal to the line. It is a thing.

In the invention according to claim 2, the pair of discharge parts are connected by an auxiliary discharge part extending in the line direction above the electric wire.

Furthermore, in the invention according to claim 3, a conductive member for capturing an arc is attached to the electric wires on both sides of the discharge electrode on the charging side.

[Operation] In the lightning arrester device according to the first aspect of the present invention, when an abnormal voltage caused by lightning is applied to the electric wire and the current at this time is about to be discharged from the electric wire to the ground-side discharge electrode,
The discharge electrode on the charging side is provided with a pair of discharge portions having a convex arc shape toward the ground-side discharge electrode at predetermined intervals in the line direction,
Moreover, since the electric current is arranged in a direction substantially orthogonal to the line, the electric current is not directly discharged from the electric wire, but is discharged from any one of the discharge parts of the charging side discharge electrode to the ground side discharge electrode. Therefore, there is no possibility that the electric wire will be damaged by the discharge.

In particular, according to the first aspect of the invention, the upper part of the electric wire is covered with a pair of arc-shaped discharge parts in an arc shape, and both discharge parts are arranged at a predetermined interval in the line direction and in a direction substantially orthogonal to the line. The direct discharge from the electric wire can be reliably prevented by using a small amount of material.

Further, since it is not necessary to wind an armor rod made of aluminum wire or the like around the electric wire, the structure of the entire device is simplified and the device is easily attached.

According to the second aspect of the present invention, the pair of discharge portions of the charging side discharge electrode are connected by the auxiliary discharge portion extending in the line direction above the electric wire. It is possible to more surely prevent the electric current at the time of being discharged to the discharge electrode from being discharged to the ground-side discharge electrode via the auxiliary discharge portion and damaging the electric wire.

Further, in the invention according to claim 3, since the conductive member for capturing an arc is mounted on the electric wires on both sides of the discharge electrode on the charging side, an abnormal voltage caused by a lightning strike is applied to the electric wires, When the current is about to be discharged directly from the wire to the ground side discharge electrode without passing through the discharge side discharge electrode, the current is discharged to the ground side discharge electrode via the conductive member on the wire. To be done. Therefore, there is no possibility that the electric wire will be damaged by the discharge. Since it is not necessary to wind the conductive member around the electric wire, it is easy to mount and the manufacturing is also easy.

[Embodiment] Hereinafter, a first embodiment in which the present invention is embodied in a tension resistant lightning insulator device.
An embodiment will be described in detail with reference to FIGS.

As shown in FIGS. 1 and 3, a mounting plate 2 is fixed to a support arm 1 of a steel tower with bolts 3. Mounting plate 2
Supporting insulators 5 made of tension insulators are connected and supported at both left and right ends of the supporting towers via the steel tower side connecting fittings 4, respectively. 7
Is erected and supported. Connection fittings on the tower side and electric wire side 4,
The arc horns 8 and 9 are provided at 6 so as to face each other. Two conductor jumper wires 10 are connected and fixed to both the wire-side connecting fittings 6 at both ends.
It extends in an arc shape between the two.

As shown in FIGS. 1 to 3, a pair of lightning protection insulators 11 connected in series are suspended and fixed to the tip end portion of the support arm 1 through a mounting adapter 12. Voltage −
Current limiting elements 13 each having a non-linear current characteristic are provided. Arcing rings on both upper and lower ends of both lightning protection insulators 11.
14 and 15 are provided to prevent the flashover of the lightning insulator 11 from creeping.

As shown in FIGS. 1 to 5, a pair of support plates 16 are clamped between the jumper wires 10 below the lightning protection insulator 11.
It is erected and supported via 17 and has a threaded rod at the center of the top surface.
18 are erected. A front U-shaped mounting bracket 19 is fixed to both screw rods 18 by nuts 20 at a predetermined height position, and a ring-shaped discharge electrode on the power-supply side has a ring shape on both upper ends thereof.
21 is fixed by welding.

A pair of discharge parts 21a having an upward convex arc shape are provided on both left and right sides of the charging side discharge electrode 21, and are arranged at a predetermined interval in the line direction, and both discharge parts 21a are line-shaped. Are arranged in a direction substantially orthogonal to. Both discharge parts 21a
A pair of auxiliary discharge portions 21b having a concave arc shape upward are provided on both front and rear sides of the charging side discharge electrode 21 so as to connect the lower end portions of the jumper wire 10 in the line direction. It is extended.

As shown in FIG. 1 to FIG. 3, a bracket 22 is fixed to the electrode-side electrode metal fitting at the lower end of the lightning protection insulator 11, and a ground-side discharge electrode 23 is attached to this bracket 22. .
The ground-side discharge electrode 23 is formed in a ring shape, and arcuate recesses 23a are provided in lower portions on both front and rear sides thereof.
Arc-shaped convex portions 23b are provided on the lower portions on the left and right sides.
In this embodiment, as shown in FIG. 3, the convex portion 23b of the discharge electrode 23 on the ground side has a large radius arc centered around the upper end supporting portion of the lightning protection insulator 11. Even if the jumper wire 10 is laterally swayed by the wind, the discharge part 21a of the discharge side discharge electrode 21 on the jumper wire 10 is constantly discharged to the convex part 23b of the ground side discharge electrode 23 in a predetermined air discharge. It opposes with the gap G.

In addition, the gap length of the air discharge gap G is the same as that of the mounting plate.
It is possible to easily change the setting by adjusting the mounting height position of the mounting bracket 19 with respect to the screw rod 18 on the 16 and changing the mounting position of the charging side discharge electrode 21.

As shown in FIG. 1, FIG. 2 and FIG. 6, a conductive member 24 for capturing an arc is provided on the jumper wire 10 in the vicinity of the left and right sides of the discharge electrode 21 on the charging side via a pair of clamps 25. Are installed respectively. The conductive member 24 is formed in a round bar shape with an aluminum wire or the like, and extends parallel to the jumper wire 10 at a position near the upper side of the jumper wire 10.

Next, the operation of the tension-type lightning arrester device configured as described above will be described.

Now, when a lightning surge caused by a lightning strike is applied to the power transmission line 7, the surge current at this time reaches the discharge electrode 21 on the voltage application side through the jumper wire 10, and the discharge electrode 21 and the discharge electrode 23 on the ground side. It is discharged in the air discharge gap G between and, and flows to the support arm 1 of the steel tower through the current limiting element 13 in both lightning insulators 11 and the mounting adapter 12 and is grounded. The subsequent arc generated thereafter is blocked by the air discharge gap G and the current limiting element 13.

Now, in this embodiment, the discharge electrode 21 on the charging side is provided with a pair of convex arc-shaped discharge parts 21a, which are arranged at a predetermined interval in the line direction, and both discharge parts 21a are substantially in line with the line. Since they are arranged in the orthogonal direction, the surge current caused by the application of the lightning surge caused by the lightning strike is
When trying to discharge from 10 to the discharge electrode 23 on the ground side,
The current is not directly discharged from the jumper wire 10 but is transferred to one of the discharge parts 21a of the charging side discharge electrode 21 and discharged to the ground side discharge electrode 23. Therefore, there is no possibility that the jumper wire 10 is damaged by the direct discharge from the jumper wire 10 to the ground-side discharge electrode 23.

In addition, in this embodiment, the pair of discharge portions 21a in the discharge electrode 21 on the charging side are connected by the concave arc-shaped auxiliary discharge portions 21b extending in the line direction above the jumper wire 10, so that the pair of discharge portions 21a Jumper wire 10 between discharge parts 21a
Even when an attempt is made to discharge the discharge electrode 23 on the connection side from that, the current moves to the auxiliary discharge portion 21b and is discharged to the discharge electrode 23 on the ground side, and the jumper wire 10 is prevented from being damaged.

In this embodiment, since the conductive member 24 for catching the arc is mounted on the jumper wire 10 in the vicinity of the left and right sides of the discharge electrode 21 on the charging side, by any chance, a lightning surge caused by a lightning strike should occur. The surge current due to the application of the voltage will be discharged directly from the jumper wire 10 to the discharge electrode 23 on the ground side without being discharged from the jumper wire 10 to the discharge electrode 21 on the charging side in the air discharge gap G. Even in such a case, the current flows from the jumper wire 10 to the conductive member 24, and then is discharged from the conductive member 24 to the ground-side discharge electrode 23. Therefore, it is possible to reliably prevent the jumper wire 10 from being damaged by the direct discharge from the jumper wire 10 to the discharge electrode 23 on the ground side.

Further, in this embodiment, the discharge electrodes 21 and 23 on the charge side and the ground side are formed in a ring shape as described above, and the discharge portion 21a of the discharge electrode 21 on the charge side is an arcuate convex of the discharge electrode on the ground side. Part 23b
As shown by the chain line in FIG. 3, even if the jumper wire 10 sways due to the wind, the discharge part 21a of the discharge side discharge electrode 21 on the jumper wire 10 is discharged to the ground side. The projection 23b of the electrode 23 is always maintained in a state of being opposed to each other with a predetermined air discharge gap G.

[Another Embodiment] Next, a second embodiment in which the present invention is also embodied in a tension-type lightning arrester device will be described with reference to FIGS. 7 to 9.

Now, in this embodiment, the discharge electrode 21 on the charging side is mounted on the jumper wire 10 of four conductors.
The structure of 21 is different from that of the first embodiment. That is, the pair of support members 26 are fixedly supported via the clamp portions 26a so that the jumper wires 10 are located at predetermined intervals in the line direction, and the screw rod 27 is provided upright in the center of the upper surface of them. There is. A mounting bracket 28 having a substantially U-shaped front shape is fixed to both screw rods 27 by nuts 29 at a predetermined height position, and discharge electrodes 21 on the voltage-imparting side are welded and fixed to upper ends of both ends thereof.

A pair of discharge parts 21a having an upwardly convex arc shape are provided on both left and right sides of the discharge electrode 21 on the voltage applying side, and are arranged at predetermined intervals in the line direction. A pair of auxiliary discharge parts 21b having a concave arc shape is connected and fixed between the upper ends of the discharge parts 21a, and extends in the line direction above the jumper wire 10. And, in this embodiment, in particular, the arrangement interval of both discharge parts 21a of the discharge side discharge electrode 21 is configured to be larger than the interval between both side convex portions 23b of the ground side discharge electrode 23, the discharge side The discharge portion 21a of the electrode 21 and the convex portion 23b of the ground side discharge electrode 23 are arranged to face each other with a predetermined air discharge gap G in a direction inclined by an arbitrary angle with respect to the perpendicular.

Therefore, according to the second embodiment, in addition to the same effects as the first embodiment described above, the following effects unique to this embodiment can be expected. That is, the discharge portion 21a of the charging-side discharge electrode 21 and the convex portion 23b of the ground-side discharge electrode 23 are arranged to face each other with a predetermined air discharge gap G in a direction inclined by an arbitrary angle with respect to the perpendicular. Because
The distance from the mounting position of the discharge side discharge electrode 21 on the jumper wire 10 to the tip of the support arm 1 is fixed in terms of equipment, and the distance between the jumper wire 10 and the lower end of the lightning protection insulator 11 is increased in the vertical direction. Even when the predetermined air discharge gap G cannot be established, the air discharge gap G having a predetermined gap length can be secured in the inclined direction between the discharge electrodes 21 and 23 on the voltage application side and the ground side. .

Next, a third embodiment in which the present invention is embodied in a suspension type lightning arrester device
An embodiment will be described based on FIGS. 10 and 11.

As shown in FIG. 10, a suspension metal fitting is attached to the support arm 1 of the tower.
A horn mounting bracket 32 is connected to the suspension bracket 30 via a U clevis 31. The support insulator 5 is suspended and supported by the horn mounting member 32 so as to be swingable in the line direction and the direction orthogonal to the line direction. In this embodiment, the suspension insulator 5 is composed of a suspension insulator string in which a plurality of suspension insulators 33 are connected in series. There is. A horn mounting bracket 34 is connected to the lower end of the support insulator 5, and a plurality of electric wire clamps 36 for supporting the four-conductor power transmission line 7 are mounted to the horn mounting bracket 34 via a connecting link 35. . Arcing horns 37 and 38 are attached to both horn mounting brackets 32 and 34, and the arcing horns 37 and 38 support the insulator 5 during abnormal lightning strikes.
Damage to the surface flashover is reduced.

A mounting adapter 39 is fixed to the tip end of the support arm 1 in a cantilever manner so as to extend horizontally in the same direction as the track,
A lightning protection insulator 11 is suspended and fixed to the lower surface of the tip. The lightning protection insulator 11 has a structure similar to that of the first embodiment described above, and a ground side discharge electrode 23 having substantially the same structure as that of the first embodiment is provided at the lower end portion thereof.

Further, below the ground side discharge electrode 23, a pair of support members 40 are fixedly supported on the power transmission line 7 via clamp portions 40a so as to be positioned at predetermined intervals in the line direction. A mounting plate 41 is erected and fixed between the central portions of the upper surfaces of both supporting members 40, and a pair of elongated holes 41a extending in the lateral direction for mounting the discharge electrode 21 on the charging side are formed in the mounting plate 41. .

The discharge electrode 21 on the charging side includes a pair of convex arc-shaped discharge portions 21a arranged at a predetermined interval in the line direction, and both discharge portions 2
It is composed of three auxiliary discharge parts 21b having a substantially U-shaped front shape connected and fixed between the upper ends of 1a. A mounting plate 42 is hung and fixed on the central lower surface of the intermediate auxiliary discharge portion 21b,
The mounting plate 42 has a pair of elongated holes 42a extending in the vertical direction. Then, the plurality of bolts 43 are inserted into the long holes 41a, 42a of both the mounting plates 41, 42 and the nuts are tightened, so that the discharge electrode 21 on the voltage-imparting side is arranged on the power transmission line 7 in the line direction and orthogonal to the line direction. It can be mounted so as to be movable in the vertical direction and rotatable about a horizontal axis orthogonal to the track direction.

Therefore, according to the third embodiment, in addition to the same effects as those of the first and second embodiments described above, the following unique effects of this embodiment can be expected. That is, since the mounting position of the power-discharging side discharge electrode 21 is configured to be adjustable, the mounting position of the power-discharging side discharge electrode 21 is moved and adjusted in the line direction, and is rotationally adjusted around the horizontal axis. By doing so, it is possible to easily position and arrange the power-discharging side discharge electrode 21 at a position corresponding to the ground-side discharge electrode 23, and by vertically adjusting the mounting position of the power-discharging side discharge electrode 21. The gap length of the air discharge gap G can be easily changed.

Next, still another embodiment of the present invention will be described with reference to FIGS.

First, a fourth embodiment shown in FIG. 12 is a partial modification of the configuration of the first embodiment. In this embodiment, the jumper wire 10 is below the lightning arrestor 11 and the lightning
Disposed on the base end side of the support arm 1 by a predetermined distance L with respect to the axis center of 11, and arranged on the jumper wire 10 so as to face the discharge electrode 21 on the charging side and discharge on the ground side. The electrode 23 is provided at the lower end of the lightning protection insulator 11 so as to be offset by the same distance L. Therefore, according to the device of the fourth embodiment,
The load applied to the support arm 1 can be reduced.

The fifth embodiment shown in FIGS. 13 and 14 is a modification of the support structure of the lightning arrester 11 in the first and second embodiments. That is, in this embodiment, the lightning protection insulator 11 is attached to the mounting adapter 12 at the tip of the support arm 1,
The lightning protection insulator 11 is swingably mounted and supported by a pair of U clevis 46, 47, support bolts 48, nuts 49, etc.
The ground-side electrode fitting at the upper end of is attached to the mounting adapter 12 via a bond wire 50. Therefore, according to the device of this embodiment, when the jumper wire 10 rolls by the wind,
In synchronization with this, the lightning protection insulator 11 is also swung through the support portion of the U clevis 46, 47, etc., and the discharge electrodes on the charging side and the grounding side.
21 and 23 are always maintained in a predetermined correspondence.

The present invention is not limited to the configurations of the above-described embodiments, and can be modified and embodied as follows.

(1) In the first embodiment, a plurality of conductor members 24 are arranged along the curve of the jumper wire 10.

(2) In the fifth embodiment shown in FIGS. 13 and 14, U
A ball joint or the like should be used instead of the clevis to swingably mount the lightning protection insulator 11 to the mounting adapter 12 at the tip of the support arm 1.

(3) As shown in FIG. 15, a suspension insulator string composed of suspension insulators 33 serving as the support insulators 5 is suspended from the support arm 1,
In the suspension type lightning arrester device in which the power transmission line 7 is supported at the lower end thereof via the electric wire clamp 36, the discharge electrode 21 is supported on the power transmission line 7 and the conductive member 24 is positioned so as to be positioned on both sides thereof.
To support.

(4) In the first and second embodiments, the lightning protection insulator 11 is fixedly supported by the mounting adapter 12 at the tip of the support arm 1, and the grounding side discharge electrode 23 is protected by a universal joint such as a U-clevis. Attach to the lower end of the insulator 11 so that it can swing. Further, in this structure, the discharge electrode 23 on the ground side and the electrode fitting 21 on the charging side should be connected by a bond wire.

(5) The lightning protection insulator device of the present invention is embodied not only in the two-conductor and four-conductor type electric wires in each of the above-described embodiments, but also in one conductor or multi-conductor type electric wires such as 3,6,8 conductors. To carry out.

(6) In the first embodiment shown in FIGS. 1 to 6, the discharge electrode 21 is formed to have a narrow width. At this time, the conductive member 24 can reliably prevent the jumper wire 10 from generating an arc.

EFFECTS OF THE INVENTION As described above, in the invention according to claim 1, the discharge electrode on the charging side is provided with a pair of discharge portions having a convex arc shape toward the discharge electrode on the ground side at predetermined intervals in the line direction. By arranging in a direction orthogonal to the line, there is no need to wind an armor rod around the wire, the structure is simple and it can be manufactured at low cost, and even in the unlikely event of a ground fault, the wire will be grounded. The arc starting point can be fixed to the tip of either one of the discharge parts without being directly discharged to the side discharge electrode, and the electric wire damage due to the discharge can be reliably prevented. Further, when applied to a suspension type transmission line support insulator device, it is possible to easily secure the discharge gap between the discharge electrodes on the power-supply side and the ground side, and to easily attach and detach the discharge electrodes on the power-supply side.

Further, in the invention according to claim 2, since the pair of discharge parts of the charging side discharge electrode are connected by the auxiliary discharge part extending in the line direction above the electric wire, the electric wire from the electric wire to the ground side is connected between the pair of discharge parts. Even when the discharge electrode is directly discharged, it is possible to more reliably prevent the electric current from being discharged to the ground-side discharge electrode through the auxiliary discharge portion and damaging the electric wire.

Furthermore, in the invention according to claim 3, since the conductive member for capturing an arc is mounted on the electric wires on both sides of the discharge electrode on the charging side, an abnormal voltage caused by a lightning strike is applied to the electric wire, If the electric current is going to be discharged directly from the wire to the grounding discharge electrode without passing through the charging side discharge electrode, the current is discharged to the grounding discharge electrode via the conductive member on the wire. . Therefore, there is no possibility that the electric wire will be damaged by the discharge. Since it is not necessary to wind the conductive member around the electric wire, it is easy to mount and the manufacturing is also easy.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment in which the present invention is embodied in a tension-type lightning arrester device, and FIG. 2 is a partial front view showing a part of the lightning arrester and jumper wires in an enlarged manner. The figure is a partial side view of the same structure, FIG. 4 is a partially enlarged sectional view taken along the line AA of FIG. 2, FIG. 5 is a sectional view taken along the line BB of FIG. 4, and FIG. 7 is an enlarged sectional view taken along line C-C of FIG. 7, FIG. 7 is a partial front view showing a second embodiment in which the present invention is also embodied in a tension-type lightning arrester device, and FIG. 8 is a partial side sectional view of the same construction, FIG. 9 is an enlarged perspective view showing a discharge electrode on the charging side, FIG. 10 is a front view showing a third embodiment in which the present invention is embodied in a suspension type lightning arrester device, and FIG. 11 is its section. FIG. 12 is a partial side view showing a fourth embodiment of the present invention, and FIG. 13 is a part showing a fifth embodiment of the present invention. Side view, FIG. 14 is an exploded perspective view showing an enlarged insulator support structure in the embodiment of FIG. 13, 15
The figure is a schematic front view showing still another embodiment of the present invention. 1 ... Support arm, 5 ... Support insulator, 7 ... Transmission line, 10
...... Jumper wire, 11 ...... Lightning arrester, 13 ...... Current limiting element, 21
...... Discharge electrode on the charging side, 21a ...... Discharge part, 21b ...... Auxiliary discharge part, 23 ...... Discharge electrode on the ground side, 24 ...... Conductive member, G ...
… Air discharge gap.

Claims (3)

[Claims] 1. A support insulator (5, 3) attached to a support arm (1) of a steel tower.
A lightning protection insulator (11) that supports an electric wire (7) or a jumper wire (10) via 1) and has a built-in current limiting element (13) having a non-linear voltage-current characteristic in the support arm (1). And a discharge electrode (21) on the charging side is provided on the electric wire (7) or jumper wire (10), and a lightning arrester (11)
In the lightning arrester device, a discharge electrode (23) on the ground side is provided so as to face the discharge electrode (21) on the charging side with a predetermined air discharge gap (G). The discharge electrode (21) of the
A lightning arrester device characterized in that a pair of discharge parts (21a) having a convex arc shape toward 3) are arranged at predetermined intervals in the line direction and in a direction substantially orthogonal to the line. 2. The lightning arrester device according to claim 1,
A lightning arrester device characterized in that the pair of discharge parts (21a) are connected by an auxiliary discharge part (21d) extending in the line direction above the electric wire (7) or the jumper wire (10). 3. A support insulator (5, 3) attached to a support arm (1) of a steel tower.
A lightning protection insulator (11) that supports an electric wire (7) or a jumper wire (10) via 1) and has a built-in current limiting element (13) having a non-linear voltage-current characteristic in the support arm (1). And a discharge electrode (21) on the charging side is provided on the electric wire (7) or jumper wire (10), and a lightning arrester (11)
In the lightning arrester device, a discharge electrode (23) on the ground side is provided so as to face the discharge electrode (21) on the charging side with a predetermined air discharge gap (G). On the electric wire (7) or jumper wire (10) on both sides of the discharge electrode (21) of the
4) A lightning protection insulator device characterized by being equipped with.