JPH02126522A - Lightening insulator - Google Patents

Abstract

PURPOSE:To entirely prevent damage to a wire caused by a thunderbolt by installing a pair of circular arc discharge sections arranged at prescribed intervals in a line direction at the discharge electrode of a charge side. CONSTITUTION:A pair of convex circular arc discharge sections 21a are installed upward at the right and left sides of a charge-side electrode 21 such that they are arranged at prescribed intervals in a line direction. Therefore, when an abnormal voltage caused by a thunderbolt is impressed to an electric wire a current is about to be discharged from a electric wire 10 to the discharge electrode 23 at the earth side, the current is never discharged directly from the wire 10 because a pair of discharge sections 21a arranged at prescribed intervals in a line direction are installed at the discharge electrode 21 of a charge side. Then, a charge will be released from either of the discharge sections of the charge-side discharge electrode 21 to the discharge electrode 23 at the earth side. Thereby, there are not possibilities that the electric wire may be damaged because of discharge.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] This invention provides a method for quickly grounding a power transmission line when abnormally high voltage caused by a lightning strike is applied to the power transmission line, and also for preventing a follow-on arc that occurs thereafter. This article relates to a lightning arrester device for quickly extinguishing arcs and preventing power outages due to ground faults in power transmission lines.

[Prior Art] As a conventional lightning arrester 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 tower side connecting fittings, and these tension insulators are connected to electric wires ( A power transmission line is installed via the jllJ connecting fittings, and both ends of a jumper wire are connected between the connecting fittings on both electric wire sides, and a lightning arrester is suspended and supported from the tip of the support arm, and a lightning arrester is suspended and supported on the jumper wire. In addition to providing a discharge electrode on the energized side, a grounding side discharge electrode is provided at the lower end of the lightning arrester so as to face the discharge voltage on the energized side and the bottle with a predetermined air discharge gap. A tension type lightning arrester device is known.

However, in this conventional tension-resistant lightning arrester device, the discharge electrode of section E IIFI, which has one discharge part, is provided on the jumper wire, so abnormal voltage caused by lightning is applied to the power transmission line. , the current at this time reaches the discharge electrode on the energized side via the jumper wire, and when it is discharged in the air discharge gap between the discharge electrode on the energized side and the discharge electrode on the grounded side, the energized There is a risk that the jumper wire may be damaged because a discharge occurs directly from the nearby jumper wire to the ground side discharge electrode without passing through the side discharge electrode.

For this purpose, in conventional tension-resistant lightning arrester devices, an armor rod made of aluminum wire or the like is wrapped around a jumper wire near the discharge electrode on the energized side, and the armour rod is connected to the discharge electrode on the ground side. so that a discharge occurs between
It was designed to prevent jumper wires from fusing.

[Problem to be solved by the invention] However, in this conventional device, the armor rod must be wrapped around the jumper wire, so it is not a scale that is difficult to manufacture and expensive, but in order to ensure its effectiveness. It was necessary to install an armor rod over almost the entire jumper wire.

This invention was made by focusing on the problems that exist in the conventional technology, and its purpose is to attach armor rods to jumper wires, power transmission lines, etc. (when collectively referred to as simply electric wires). There is no need to wrap the arc, and the structure is simple and can be manufactured at low cost.In addition, in the unlikely event of a ground fault, the arc starting point can be fixed to the tip of the discharge part or a conductive member, and the An object of the present invention is to provide a lightning arrester device that can reliably prevent damage to electric wires.

[Means for solving the problem] In order to achieve the above object, the invention according to claim 1 has the following features:
In the lightning arrester device, a pair of arc-shaped discharge portions are provided on the discharge electrode on the power supply side and are arranged at a predetermined interval in the direction of the line.

Further, 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 as set forth in claim 3, conductive members for arc capture are attached to the electric wires on both sides of the discharge electrode on the power supply side.

[Function 1] In the lightning arrester device of the invention according to claim 1, when an abnormal voltage due to a lightning strike is applied to the electric wire and the current at this time is about to be discharged from the electric wire to the grounding side discharge electrode,
The discharge electrode on the energized side is provided with a pair of discharge parts arranged at a predetermined interval in the direction of the line, so the current is not directly discharged from the wire, but rather flows through either of the energized discharge electrodes. A discharge is made from one of the discharge parts to the ground-side discharge electrode.

Therefore, there is no risk that the electric wire will be damaged due to discharge.

Since there is no need to wrap an armor rod made of aluminum wire or the like around the electric wire, the entire device can be easily constructed, and the device can also be easily installed.

In the invention as claimed in claim 2, since the pair of discharge parts in the energized side discharge electrode are connected by the auxiliary discharge part extending in the line direction above the electric wire, there is no connection between the pair of discharge parts from the electric wire to the ground side. The current that is about to be discharged to the discharge electrode is discharged to the ground-side discharge electrode via this auxiliary discharge part, and the possibility of damage to the electric wire can be more reliably prevented.

Furthermore, in the invention as claimed in claim 3, conductive members for arc capture are attached to the electric wires on both sides of the discharge electrode on the energized side, so that abnormal voltage caused by lightning is applied to the electric wires. If the current is to be discharged directly from the wire to the grounded discharge electrode without passing through the charged side discharge electrode, the current will be discharged to the grounded discharge electrode via the conductive member on the wire. be done. Therefore, there is no risk that the electric wire will be damaged due to discharge. Since the conductive member does not need to be wrapped around an electric wire, it is easy to attach and manufacture.

[Example] Hereinafter, the first embodiment of this invention in a tension-resistant lightning arrester device will be described.
An embodiment will be described in detail based on FIGS. 1 to 6.

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. As shown in FIGS. Mounting plate 2
Support hooks 5 made of tension hooks are connected and supported on both the left and right sides of A power transmission line 7 is installed and supported.Arc pawns 8 and 9 are provided on the connecting fittings 4.6 on the tower side and the electric wire side so as to face each other. A two-conductor jumper wire 10 is connected and fixed at both ends, and extends in an arc shape between the connecting fittings 6 on both wire sides.

As shown in FIGS. 1 to 3, a pair of lightning arresters 11 connected in series are suspended from the tip of the support arm 1 via mounting adapters 12, and each lightning arrester 11 has a Current-limiting elements 13 each having a non-linear voltage-current characteristic are provided. Arcing links 14 and 15 are provided at the upper and lower ends of both lightning arresters 11, respectively.
No. 1 creeping flash is prevented.

As shown in FIGS. 1 to 5, a pair of support plates 16 are installed and supported between the jumper wires 10 below the lightning arrester 11 via clamps 17, and a threaded rod 18 is provided at the center of their upper surface. has been erected. A mounting bracket 19 in the shape of a U-shape from the front is fixed to a predetermined height position by a nut 20 on both threaded rods 18, and a ring-shaped discharge electrode 21 on the power feeding side is welded and fixed to the top of both ends. There is.

A pair of discharge portions 21a having an upwardly convex arc shape are provided on both left and right sides of the energizing side discharge electrode 21, and are arranged at a predetermined interval in the line direction. Re-discharge section 2
The charging side discharge electrode 21 connects the lower ends of the electrodes 1a.
A pair of auxiliary discharge portions 21b having a concave arc shape upward are provided on both front and rear sides of the jumper wire 10, and extend in the line direction above the jumper wire 10.

As shown in FIGS. 1 to 3, a bracket 22 is fixed to the energized side electrode fitting at the lower end of the lightning arrester 11, and a grounding side discharge electrode 23 is sorbed onto the brackets 22 to 22. ing. This ground-side discharge electrode 23 is formed in a ring shape, and has four arcuate portions 23a provided at its front and rear lower portions, and arcuate convex portions 23b at its left and right lower portions. In this embodiment, as shown in FIG. 3, especially the convex portion 23b of the discharge electrode 23 on the ground side.
is formed in a circular arc shape with a large radius centered near the upper end support portion of the lightning arrester 11, so that even if the jumper wire 10 is swayed sideways by the wind, the voltage applied to the jumper wire 10 is The discharge portion 21a of the spider 21 always faces the convex portion 23b of the ground side discharge electrode 23 with a predetermined air discharge gap G therebetween.

The gap length of this air discharge gap G can be determined by adjusting the mounting height position of the mounting bracket 19 with respect to the threaded rod 18 on the mounting plate 16 to change the mounting position of the energized open voltage/outer 21. This allows you to easily change settings.

As shown in FIGS. 1, 2, and 6, jumper wires 10
A conductive member 24 for arc capture is mounted on a pair of clamps 2.
5, respectively. This conductive member 24
is formed into a round bar shape using aluminum wire or the like, and the jumper wire 10
It 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-resistant lightning arrester device configured as described above will be explained.

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 energized side via the jumper wire 10, and the discharge electrode 21 and the discharge electrode 23 on the ground side The current limiting element 13 in both lightning arresters 11 and the mounting adapter 1 are discharged in the air discharge gap G between them.
2 etc., it flows to the support arm 1 of the steel tower and is grounded.

A follow-on arc generated thereafter is blocked by the air discharge gap G and the current limiting element 13.

In this embodiment, a pair of convex arc-shaped discharge parts 21a are provided in the discharge part [21] on the power supply side, and are arranged at a predetermined interval in the direction of the line. When the surge current caused by the application of lightning surge is about to be discharged from one jumper IIO to the grounding side discharge @ pole 23, the current is not directly discharged from the jumper wire 10, but instead is discharged from the energized side discharge electrode. 21, and is discharged to the ground-side discharge electrode 23. Therefore, there is no risk that the jumper wire 10 will be damaged by direct discharge from the jumper wire 10 to the ground-side discharge electrode 23.

Further, in this embodiment, since the pair of discharge parts 21a of the discharge electrode 21 on the energizing side are connected by the concave arc-shaped auxiliary discharge part 21b extending in the line direction above the jumper wire 10, the pair Even if the jumper wire 10 is to be discharged to the ground side discharge electrode 23 between the discharge parts 21a, the current transfers to the auxiliary discharge part 21b and is discharged to the ground side discharge part 'ff123, and the jumper wire 10 damage is prevented.

In addition, in this embodiment, the discharge section t6!2 on the power supply side
Since conductive members 24 for arc capture are attached to the jumper wire 10 on both the left and right sides of the jumper wire 1, in the unlikely event that a surge current due to the application of a lightning surge caused by a lightning strike is applied from the jumper wire 10. Even if an attempt is made to discharge directly from the jumper wire 10 to the ground side discharge electrode 23 without reaching the discharge electrode 21 on the side and being discharged in the air discharge gap G, the current will not be discharged on the jumper wire 10. After flowing from the conductive member 24 to the conductive member 24, it is discharged from the conductive member 24 to the discharge electrode 23 on the ground side. Therefore, it is possible to reliably prevent damage to the jumper wire 10 due to direct discharge from the jumper wire 10 to the ground-side discharge electrode 23.

Further, in this embodiment, as described above, the discharge electrodes 21 and 23 on the energizing side and the grounding side are formed in a ring shape, and the discharge portion 21a of the energizing side discharge electrode 21 corresponds to the arc-shaped convexity of the grounding side discharge electrode. As shown by the chain line in FIG. 3, even when the jumper wire 10 is swayed horizontally by the wind, the charging side discharge electrode 21 on the jumper wire 10 is disposed opposite to the portion 23b.
The discharge part 21a is always maintained in a state opposite to the convex part 23b of the ground side discharge minister 23 with a predetermined aerial discharge gap G.

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

Now, in this embodiment, there is a discharge section on the energized side on the four-conductor jumper wire 10; F! i21, and is different from the first embodiment in the configuration of the discharge electrode 21 on the power supply side. That is, a pair of support members 26 are fixedly supported on the jumper wire 10 via clamp portions 26a so as to be positioned at a predetermined interval in the track direction, and a threaded rod 27 is erected at the center of the upper surface of the support members 26. A mounting bracket 28 having a pressure surface and a substantially U-shape is fixed at a predetermined height position to the six double-threaded rod 27 by a nut 29, and discharge portions tf121 on the power supply side are welded and fixed to the upper ends of both ends.

A pair of discharge parts 21a having an upwardly convex arc shape are provided on both left and right sides of the discharge part ei21 on the power supply side,
They are arranged at predetermined intervals in the direction of the track. A pair of auxiliary discharge parts 21b having an upward concave arc shape are connected and fixed between the upper ends of the re-discharge part 21a, and the jumper wire 10
It extends above the line in the direction of the track. In this embodiment, in particular, the arrangement interval of the re-discharge portion 21a of the energized discharge electrode 21 is set to
The distance between the discharge part 21a of the charging side discharge electrode 21 and the convex part 2 of the grounding side discharge electrode 23 is larger than the distance b.
3b are arranged to face each other with a predetermined aerial discharge gap G in a direction inclined at an arbitrary angle with respect to the perpendicular.

Therefore, according to this second embodiment, in addition to the same effects as those of the first embodiment described above, the following effects unique to this embodiment can be expected.

That is, the discharge portion 21a of the energized discharge electrode 21 and the convex portion 23b of the ground discharge electrode 23 are arranged opposite to each other with a predetermined aerial discharge gap G in a direction inclined at an arbitrary angle with respect to the perpendicular line. Therefore, the distance from the mounting position of the energizing side discharge electrode 21 on the jumper wire 10 to the tip of the support arm 1 is fixed due to the equipment, and the distance between the jumper wire 10 and the lower end of the lightning arrester 11 is fixed. Even if it is not possible to fit a predetermined air discharge gap G in the vertical direction, an air discharge gap G with a predetermined gap length in the oblique direction is created between the discharge electrodes 21 and 23 on the energizing side and the grounding side. can be secured.

Next, we will discuss the third embodiment of this invention in a suspended type lightning arrester device.
An embodiment will be described based on FIG. 10 and FIG. 11.

As shown in FIG. 10, a hanging metal fitting 30 is attached to the support arm 1 of the steel tower, and a horn mounting metal fitting 32 is connected to this hanging metal fitting 30 via a U clevis 31.

A support insulator 5 is suspended from the horn mounting bracket 32 so as to be swingable in the direction of the railway line and in a direction perpendicular thereto. ing. A horn mounting bracket 34 is connected to the lower end of the support insulator 5, and a plurality of wire clamps 36 for supporting the four-conductor power transmission line 7 are attached to the horn mounting bracket 34 via connection links 35. . Both bone mounting brackets 32.34 have arcing horns 37.
3B is attached, and these arcing horns 37 and 38 reduce creeping damage to the support insulator 5 during an abnormal lightning strike.

Three mounting adapters are fixed to the tip of the support arm 1 in a cantilevered manner so as to extend horizontally in the same direction as the railway line, and a lightning arrester 11 is fixedly suspended from the lower surface of the tip. This lightning arrester 11 is constructed in substantially the same manner as in the first embodiment described above, and is provided with a ground-side discharge electrode 23 having substantially the same structure as in the first embodiment at its lower end.

Below the ground side discharge electrode 23, the power transmission line 7
A pair of support members 40 are fixedly supported via clamp portions 40a so as to be positioned at a predetermined interval in the track direction. A mounting plate 41 is provided between the center portions of the upper surfaces of both supporting members 40.
is constructed and fixed, and this mounting plate 41 has a pair of elongated holes 41 extending in the horizontal direction for attaching the discharge electrode 21 on the energizing side.
a is formed.

The discharge electrode 21 on the energizing side has a pair of convex arc-shaped discharge portions 21a arranged at a predetermined interval in the line direction, and a front-shaped U-shaped portion connected and fixed between the upper end of the re-discharge portion 21a. It is composed of three auxiliary discharge parts 21b forming a letter shape. A mounting plate 42 is fixedly suspended from the central lower surface of the intermediate auxiliary discharge section 21b, and a pair of elongated holes 42a extending in the vertical direction are formed in the mounting plate 42. And the re-accommodation board 41
By inserting a plurality of bolts 43 into the elongated holes 41a and 42a of 42 and tightening the nuts, the discharge electrode 21 on the power supply side can be moved and adjusted on the power transmission line 7 in the line direction and in the vertical direction orthogonal to the line direction. , and can be mounted so as to be rotatably adjustable around a horizontal axis perpendicular to the line 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 effects unique to this embodiment can be expected. In other words, since the configuration is such that the mounting position of the charging side discharge voltage 21 can be adjusted, the amount of discharge on the charging side,
By adjusting the mounting position of the energizing side discharge electrode 21 by moving it in the direction of the line and adjusting its rotation around the horizontal axis.
can be easily positioned and placed in a position corresponding to the ground side discharge electrode 23, and the energized side discharge section! By moving and adjusting the mounting position of f121 in the vertical direction, the gap length of the air discharge gap G can be easily changed.

Next, still another embodiment of the present invention is shown in FIGS. 12 to 14.
The explanation will be based on the diagram.

First, the fourth embodiment shown in FIG. 12 is a partial modification of the configuration of the first embodiment, and in this embodiment,
A jumper wire 10 is installed below the lightning arrester F8 insulator 11 so as to be biased toward the base end of the support arm 1 by a predetermined pressure AI than the axis of the lightning arrester 11. A ground-side discharge electrode 23 is provided at the lower end of the lightning arrester 11 at the same distance r4iii so as to face the power-side discharge electrode 21 . Therefore, according to the device of this fourth embodiment, the load applied to the support arm 1 can be reduced.

Further, in the fifth embodiment shown in FIGS. 13 and 14, the supporting structure of the lightning arrester 11 in the first and second embodiments is changed. That is, in this example,
The lightning arrester 11 is attached to the mounting adapter 1 at the tip of the support arm 1.
2, a pair of U clevis 46.47, support port 4
8 and Narrows 1 to 49, etc., in a swingable manner, and a ground side electrode fitting at the upper end of the lightning arrester 11 is connected to the mounting adapter 12 via a pounder wire 50. Therefore, according to the device of this embodiment, the jumper wire 10
When the lightning bolt sways due to wind, the lightning arrester 11 is also swung in synchronization with the support by the U clevis 46, 47, etc., and the discharge part = Ff 21, 23 on the energizing side and the grounding side always maintains the predetermined response. maintained in a relationship.

It should be noted that the present invention is not limited to the configurations of the above-mentioned embodiments, but can be modified and embodied as follows.

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

(2) In the fifth embodiment shown in FIGS. 13 and 14, a ball joint I etc. is used instead of the U clevis,
Mounting adapter 1 at the tip of the arm 1 that supports the lightning arrester 11
2 to be swingably mounted and supported.

(3) As shown in FIG. 15, a suspension insulator chain consisting of a suspension insulator 33 as a support insulator 5 was suspended from the support arm 1, and the power transmission line 7 was supported at the lower end thereof via a wire clamp 36. In the suspension type lightning arrester device, a discharge electrode 21 is supported on the power transmission line 7, and conductive members 24 are supported so as to be located on both sides of the discharge electrode 21.

(4) In the first and second embodiments, the lightning arrester 11
is fixedly supported by the mounting adapter 12 at the tip of the support arm 1, and the discharge electrode 23 of the ground Pj is swingably attached to the lower end of the lightning arrester 11 via a universal joint such as a U clevis. In addition, in this configuration, the discharge electrode 2 on the ground side
3 and the electrode fitting 21 on the power-supplying side using a bond wire.

(5) The lightning arrester device of the present invention can be applied not only to 2-conductor and 4-conductor type electric wires in each of the above-mentioned embodiments, but also to 1-conductor or multi-conductor type electric wires such as 3, 6.3 conductor type electric wires. Implementation shall be carried 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 arcing from occurring from the jumper wire 10.

[Effects of the Invention] As explained above, the invention according to claim 1 provides a pair of arc-shaped discharge portions arranged at a predetermined interval in the line direction on the discharge electrode on the power supply side. There is no need to wrap an armor rod around the wire, making the TF4 structure simple and inexpensive to manufacture, and even in the unlikely event of a short circuit, there will be no direct discharge from the wire to the ground-side discharge electrode. , the arc starting point can be fixed at the tip of one of the discharge parts, and damage to the electric wire due to discharge can be reliably prevented.

Moreover, the invention as claimed in claim 2 connects the pair of discharge parts in the energized open voltage (4) with the auxiliary discharge part extending in the line direction above the electric wire, so that the electric wire can be removed between the pair of discharge parts. Even if a discharge is attempted to occur directly to the ground-side discharge electrode, the current is discharged to the ground-side discharge electrode via the auxiliary discharge section, and the risk of damage to the wire can be more reliably prevented. .

Furthermore, in the invention as claimed in claim 3, conductive members for arc capture are attached to the electric wires on both sides of the discharge electrode on the energized side, so that abnormal voltage caused by a lightning strike is applied to the electric wires. If the current is to be discharged directly from the wire to the discharge electrode on the ground side without passing through the discharge amount on the charged side, the current will be discharged to the discharge electrode on the ground side via the conductive member on the wire. be done. Therefore, there is no risk of wire loss due to discharge, and since the conductive member does not need to be wrapped around the wire, it is easy to store and disassemble.1. X. Manufacturing is also easier.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a first embodiment of the present invention as a tension-resistant lightning arrester device; FIG. 2 is a partial front view showing an enlarged part of the lightning arrester and jumper wire; 3 is a partial side view of the same configuration, FIG. 4 is a partially enlarged cross-sectional view taken along line A-A in FIG. 2, FIG. 5 is a cross-sectional view taken along line B-B in FIG. 4, and FIG. An enlarged sectional view taken along the line C-C in the figure,
Figure 7 also shows this invention as a tension-resistant lightning arrester device.
FIG. 8 is a partial side sectional view of the same structure, FIG. 9 is a perspective view showing the amount of discharge on the energized side, and FIG. 10 is an enlarged perspective view showing the second embodiment. This invention! A front view showing the third embodiment embodied in a V-vertical lightning arrester device, No. 11
The figure is an exploded perspective view showing the discharge electrode on the more important side.
FIG. 12 is a partial side view showing a fourth embodiment of the invention.
FIG. 13 is a partial side view showing a fifth embodiment of the present invention, FIG. 14 is an exploded perspective view showing an enlarged structure of the support structure in the practical example of FIG. 13, and FIG. 15 is a further embodiment of the present invention. It is a road body front view which shows another Example. ■... Support arm, 5... Support glass, 7... Power 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. Patent Appearance Nippon Glass Co., Ltd. Agent Patent Attorney On 1) Hironobu (1 person) Figure 5 Figure 9 T/ i 1/ Figure 18

Claims (1)

[Claims] 1. An electric wire (7) or a jumper wire (10) is supported on a support arm (1) of a steel tower via a support insulator (5, 31), and a voltage - A lightning arrester (11) incorporating a current limiting element (13) with non-linear current characteristics is installed, and a discharge electrode (21) on the energized side is provided on the electric wire (7) or jumper wire (10). Along with this, a lightning insulator (
11) is a lightning arrester device in which a grounding side discharge electrode (23) is provided to face the energized side discharge electrode (21) with a predetermined aerial discharge gap (G); The electric side discharge electrode (21) has a pair of arc-shaped discharge parts (21a) arranged at a predetermined interval in the line direction.
A lightning arrester device characterized by being provided with. 2. In the lightning arrester device according to claim 1, an auxiliary discharge portion (21b) extending in the line direction above the electric wire (7) or jumper wire (10) is provided between the pair of discharge portions (21a). A lightning arrester device characterized by being connected. 3. An electric wire (7) or a jumper wire (10) is supported on the support arm (1) of the steel tower via a support insulator (5, 31), and the support arm (1) has a non-linear voltage-current characteristic. A lightning insulator (11) with a built-in current limiting element (13) is installed, and a discharge electrode (21) on the energized side is provided on the electric wire (7) or jumper wire (10), and the lightning insulator (
11) is a lightning arrester device in which a grounding side discharge electrode (23) is provided to face the energized side discharge electrode (21) with a predetermined aerial discharge gap (G); A lightning arrester device characterized in that conductive members (24) for arc capture are attached to electric wires (7) or jumper wires (10) on both sides of a discharge electrode (21) on the electric side.