JPH04269408A - Lighting protection device for v-suspension insulator device - Google Patents
Lighting protection device for v-suspension insulator deviceInfo
- Publication number
- JPH04269408A JPH04269408A JP3047791A JP3047791A JPH04269408A JP H04269408 A JPH04269408 A JP H04269408A JP 3047791 A JP3047791 A JP 3047791A JP 3047791 A JP3047791 A JP 3047791A JP H04269408 A JPH04269408 A JP H04269408A
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- discharge electrode
- arc
- line
- lightning arrester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012212 insulator Substances 0.000 title claims abstract description 38
- 239000000725 suspension Substances 0.000 title claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Insulators (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】この発明はV吊碍子装置用避雷装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a lightning arrester for a V-type insulator.
【0002】0002
【従来の技術】従来のV吊碍子装置用避雷装置として、
特開昭62ー168305号公報に開示されたものがあ
る。この避雷装置は鉄塔の支持アームに左右一対の長幹
碍子をV型状に連結し、両長幹碍子の下端部を連結する
連結ヨークに対し連結リンク及び電線クランプを介して
送電線を支持し、前記連結ヨークに対し課電側の放電電
極を線路方向と直交する方向に片持ち支持し、一方、前
記支持アームの先端部には取付アダプタを介して避雷装
置本体を吊下固定し、さらに該避雷装置本体の下端部に
は前記課電側の放電電極と所定の気中放電間隙をもって
対向する接地側の放電電極を支持していた。[Prior Art] As a conventional lightning arrester for a V-insulator device,
There is one disclosed in Japanese Unexamined Patent Publication No. 168305/1983. This lightning arrester connects a pair of left and right long trunk insulators in a V-shape to the support arms of the steel tower, and supports the power transmission line via a connecting link and wire clamp to a connecting yoke that connects the lower ends of both long trunk insulators. , a discharge electrode on the energized side is cantilever-supported in a direction perpendicular to the line direction with respect to the connection yoke, and a lightning arrester main body is suspended and fixed to the tip of the support arm via a mounting adapter; The lower end of the main body of the lightning arrester supported a ground-side discharge electrode that faced the energized-side discharge electrode with a predetermined aerial discharge gap.
【0003】0003
【発明が解決しようとする課題】上記従来の避雷装置は
一対の長幹碍子をV型状に装着しているので、送電線が
風圧などにより揺動しても長幹碍子が線路方向には揺動
するが、線路直交方向には揺動することはなく、前記両
放電電極の気中放電間隙が大きく変化することはない。
従って、放電特性の安定した装柱状態が保持される。[Problem to be Solved by the Invention] The above-mentioned conventional lightning arrester has a pair of long trunk insulators installed in a V-shape, so even if the power transmission line swings due to wind pressure, the long trunk insulator does not move in the direction of the line. Although it oscillates, it does not oscillate in the direction perpendicular to the line, and the air discharge gap between the two discharge electrodes does not change significantly. Therefore, a column-mounted state with stable discharge characteristics is maintained.
【0004】ところが、前記長幹碍子に代えて懸垂碍子
を直列に多数連結した懸垂碍子連を使用した場合、送電
線が風圧などにより線路直交方向へ揺動すると、前記懸
垂碍子連も同方向へ揺動するので、課電側及び接地側の
両放電電極の間隙が変化するため、適応ができないとい
う問題があった。この発明の目的はV吊懸垂碍子装置が
線路方向及び線路直交方向へ揺動しても、課電側及び接
地側の両放電電極の気中放電間隙をほぼ一定に保持する
ことができるV吊碍子装置用避雷装置を提供することに
ある。However, when a suspension insulator chain in which a large number of suspension insulators are connected in series is used instead of the long trunk insulator, when the power transmission line swings in a direction perpendicular to the line due to wind pressure, the suspension insulator chain also swings in the same direction. Due to the oscillation, the gap between the discharge electrodes on the energizing side and the grounding side changes, so there is a problem that adaptation is not possible. The object of the present invention is to provide a V-suspended insulator that can maintain an almost constant air discharge gap between the discharge electrodes on the energizing side and the grounding side even when the V-suspended insulator device swings in the line direction and the direction perpendicular to the line. An object of the present invention is to provide a lightning arrester for an insulator device.
【0005】[0005]
【課題を解決するための手段】この発明は上記目的を達
成するため、支持アームに対し接地側吊下金具を介して
一対の懸垂碍子連の上端部をそれぞれ連結するとともに
、両懸垂碍子連の下端部間には課電側吊下金具をそれぞ
れ連結し、両課電側吊下金具間には前記両懸垂碍子連が
ほぼV字型になるように連結ヨークにより線路方向及び
線路直交方向への揺動可能に連結し、該連結ヨークには
電線クランプを介して送電線を支持し、前記支持アーム
には取付アダプタを介して避雷装置本体を装着し、前記
両課電側吊下金具の一方の吊下金具には、円弧状をなす
課電側の放電電極を線路方向とほぼ同方向へ延出すると
ともに、該放電電極の円弧状放電部を斜めの懸垂碍子連
軸線に沿って下向の凸状に配置し、さらに前記避雷装置
本体の先端部に対し前記課電側の放電電極と所定の気中
放電間隙をもって対向する棒状の放電電極を、前記円弧
状放電部を通る平面とほぼ直交するように、かつ該円弧
状放電部の円弧中心付近に配置するという手段を採って
いる。[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention connects the upper ends of a pair of suspension insulator chains to the support arm via a grounding side hanging metal fitting, and The energizing side hanging fittings are respectively connected between the lower ends, and between the two energizing side hanging fittings, a connecting yoke is used so that both suspension insulator chains are approximately V-shaped in the direction of the line and in the direction perpendicular to the line. The connection yoke supports the power transmission line via a wire clamp, the lightning arrester main body is attached to the support arm via a mounting adapter, and both of the power-supply-side hanging fittings are connected to each other so as to be able to swing. On one of the hanging fittings, an arc-shaped discharge electrode on the energizing side extends in substantially the same direction as the line direction, and the arc-shaped discharge part of the discharge electrode is lowered along the diagonal suspension insulator link axis. A rod-shaped discharge electrode is arranged in a convex shape in the opposite direction and is opposed to the distal end of the lightning arrester main body with a predetermined aerial discharge gap from the discharge electrode on the energizing side. A method is adopted in which the electrodes are arranged substantially orthogonally and near the center of the arc of the arc-shaped discharge section.
【0006】[0006]
【作用】この発明は送電線が風圧等により線路方向へ揺
動した場合に、前記課電側の放電電極の円弧状放電部の
先端部が懸垂碍子連の上部吊下点を中心とする円弧軌跡
に沿って揺動され、該円弧状放電部の先端部と接地側の
放電電極との気中放電間隙がほぼ一定に保持される。
又、送電線が風圧等により線路直交方向へ揺動した場合
に、課電側の放電電極が課電側の吊下金具とともに一方
の懸垂碍子連の上部吊下点を中心とする円弧軌跡に沿っ
て揺動するため、これと対向して前記円弧軌跡方向とほ
ぼ平行に設けた接地側の放電電極との放電間隙がほぼ一
定に保持される。[Operation] This invention provides that when the power transmission line swings in the direction of the line due to wind pressure, etc., the tip of the arc-shaped discharge part of the discharge electrode on the energizing side forms an arc centered on the upper suspension point of the suspended insulator chain. It is oscillated along a locus, and the air discharge gap between the tip of the arc-shaped discharge section and the ground-side discharge electrode is maintained substantially constant. In addition, when the power transmission line swings in the direction perpendicular to the line due to wind pressure, etc., the discharge electrode on the energized side, together with the suspension fitting on the energized side, moves in an arcuate trajectory centered on the upper suspension point of one suspension insulator chain. Since the discharge electrode oscillates along the arc trajectory, the discharge gap between the discharge electrode and the ground-side discharge electrode, which is disposed opposite to the discharge electrode substantially parallel to the direction of the circular arc trajectory, is maintained substantially constant.
【0007】[0007]
【実施例】以下、この発明の具体化した一実施例を図面
に基づいて説明する。鉄塔の支持アーム1には図1に示
すように左右一対の取付金具2,2がボルトにより固定
され、両取付金具2,2にはそれぞれ接地側吊下金具3
,3を介して複数の懸垂碍子を直列に連結してなる懸垂
碍子連4,4が連結され、両懸垂碍子連4,4の下端部
には課電側吊下金具5,5を介して連結ヨーク6が連結
ピン9,9により連結され、左右一対の懸垂碍子連4,
4はほぼV字状に装着されている。前記連結ヨーク6の
中央部には連結リンク7及び電線クランプ8を介して送
電線Lが支持されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in Fig. 1, a pair of left and right mounting brackets 2, 2 are fixed to the support arm 1 of the steel tower with bolts, and each of the mounting brackets 2, 2 has a ground side hanging bracket 3.
, 3 are connected to suspension insulator chains 4, 4 formed by connecting a plurality of suspension insulators in series, and the lower ends of both suspension insulator chains 4, 4 are connected via energizing side hanging fittings 5, 5. The connecting yoke 6 is connected by connecting pins 9, 9, and a pair of left and right suspension insulator chains 4,
4 is installed in an almost V-shape. A power transmission line L is supported at the center of the connection yoke 6 via a connection link 7 and a wire clamp 8 .
【0008】前記一方(図1の左側)の課電側吊下金具
5には課電側の放電電極10が支持されている。この放
電電極10は前記課電側吊下金具5に貫通固定され、か
つ線路方向に延びる基端部10aと、この基端部10a
から同じく線路方向に延びる円弧状放電部10bとによ
り形成されている。この円弧状放電部10bは、前記左
側の懸垂碍子連4の中心軸線Oを通り、かつ線路方向へ
延びる仮想平面内に位置し、斜め下方に凸となる円弧状
に形成されている。[0008] A discharge electrode 10 on the energized side is supported by the one (left side in FIG. 1) energized side hanging fitting 5 . This discharge electrode 10 has a base end portion 10a that is fixed through the power supply side hanging fitting 5 and extends in the line direction, and a base end portion 10a that extends in the line direction.
The arc-shaped discharge portion 10b also extends in the line direction. The arcuate discharge portion 10b is located in a virtual plane passing through the central axis O of the left suspension insulator chain 4 and extending in the track direction, and is formed in an arcuate shape convex diagonally downward.
【0009】なお、前記接地側吊下金具3及び課電側吊
下金具5には懸垂碍子連4を保護するためのアークホー
ン11,12がそれぞれ支持されている。前記課電側の
放電電極10は図1において左側のアークホーン12を
兼用している。前記支持アーム1の先端部には取付アダ
プタ13が図2及び図3に示すように線路方向に向けて
支持され、該取付アダプタ13の先端下面には避雷装置
本体14の上端に設けた接地側の電極金具15がボルト
により固定されている。この避雷装置本体14はFRP
などにより円筒状に形成した耐圧絶縁筒(図示略)と、
この耐圧絶縁筒内部に収容され、電圧−電流特性が非直
線性を有する酸化亜鉛を主材とする限流素子17と、前
記耐圧絶縁筒上端部に嵌合固定した接地側及び課電側の
電極金具15,16と、さらに耐圧絶縁筒の外側にゴム
モールドした絶縁外套体18とにより構成されている。[0009] Arc horns 11 and 12 for protecting the suspended insulator chain 4 are supported on the ground side hanging metal fitting 3 and the energizing side hanging metal fitting 5, respectively. The discharge electrode 10 on the power supply side also serves as the arc horn 12 on the left side in FIG. At the tip of the support arm 1, a mounting adapter 13 is supported toward the track direction as shown in FIGS. 2 and 3, and on the lower surface of the tip of the mounting adapter 13, there is a ground side provided at the upper end of the lightning arrester main body 14. The electrode fittings 15 are fixed with bolts. This lightning arrester main body 14 is made of FRP.
A pressure-resistant insulating cylinder (not shown) formed into a cylindrical shape by
A current-limiting element 17 housed inside this voltage-resistant insulating tube and mainly made of zinc oxide having non-linear voltage-current characteristics, and a current-limiting element 17 that is fitted and fixed to the upper end of the voltage-resistant insulating tube on the grounding side and the power supply side. It is composed of electrode fittings 15 and 16 and an insulating jacket 18 that is rubber-molded on the outside of the voltage-resistant insulating cylinder.
【0010】前記課電側の電極金具16には前述した課
電側の放電電極10と所定の気中放電間隙Gをもって対
向する接地側の放電電極19が支持されている。この放
電電極19は図1に示すように避雷装置本体14の課電
側電極金具16に支持される基端部19aと、前記左側
の懸垂碍子連4の中心軸線Oを通り、かつ線路方向へ指
向する前述の仮想平面に対し垂直となるように傾斜状態
で支持された棒状放電部19bとにより形成されている
。さらに、この棒状放電部19bは図3に示すように前
記課電側の円弧状放電部10bの円弧中心付近に位置し
、円弧状放電部10bの先端部との気中間隙を放電間隙
Gとしている。[0010] The electrode fitting 16 on the energizing side supports a grounding side discharge electrode 19 which faces the aforementioned energizing side discharge electrode 10 with a predetermined aerial discharge gap G therebetween. As shown in FIG. 1, this discharge electrode 19 passes through the base end 19a supported by the energized side electrode fitting 16 of the lightning arrester main body 14 and the central axis O of the suspension insulator chain 4 on the left side, and in the direction of the line. The rod-shaped discharge portion 19b is supported in an inclined state so as to be perpendicular to the oriented virtual plane. Further, as shown in FIG. 3, this rod-shaped discharge section 19b is located near the center of the arc of the arc-shaped discharge section 10b on the power supply side, and the air gap between it and the tip of the arc-shaped discharge section 10b is defined as a discharge gap G. There is.
【0011】なお、20,21は避雷装置本体14を保
護するためのアークリングである。次に、前記のように
構成したV吊碍子装置用避雷装置についてその作用を説
明する。今、送電線Lに雷撃による雷サージ電流が流れ
ると、その電流は電線クランプ8、連結リンク7、連結
ヨーク6及び課電側の放電電極10の円弧状放電部10
bの先端部から放電間隙Gを経て、接地側の放電電極1
9にフラッシュオーバーされ、電極金具16、限流素子
17、電極金具15、取付アダプタ13及び支持アーム
1を経て鉄塔に放電される。又、その後流れようとする
続流電流は前記限流素子17の抵抗値の復元及び気中放
電間隙Gにより抑制遮断され、地絡事故が未然に防止さ
れる。Note that 20 and 21 are arc rings for protecting the lightning arrester main body 14. Next, the operation of the lightning arrester for a V-suspended insulator constructed as described above will be explained. Now, when a lightning surge current due to a lightning strike flows through the power transmission line L, the current flows through the wire clamp 8, the connection link 7, the connection yoke 6, and the arc-shaped discharge portion 10 of the discharge electrode 10 on the power-supplying side.
From the tip of b, through the discharge gap G, the ground side discharge electrode 1
9, and is discharged to the steel tower via the electrode fitting 16, current limiting element 17, electrode fitting 15, mounting adapter 13, and support arm 1. Furthermore, the subsequent current that is about to flow is suppressed and interrupted by the restoration of the resistance value of the current limiting element 17 and the air discharge gap G, thereby preventing a ground fault from occurring.
【0012】さて、この発明の実施例においては、課電
側の放電電極10の円弧状放電部10bを図1及び図4
に示すように線路方向へ延びると共に左側の懸垂碍子連
4の中心軸線Oを通る線路方向の仮想平面内に位置し、
一方、接地側の放電電極19は前記仮想平面に対し垂直
に、しかも図3に示すように前記放電部10bの円弧の
ほぼ中心付近に配置したことにより、送電線Lが線路方
向に揺動して接地側吊下金具3を中心に懸垂碍子連4が
図3において左右(線路)方向に揺動した場合に、課電
側の放電電極10が同図の鎖線で示すように変位しても
、両放電電極10,19の気中放電間隙Gが一定に保た
れる。Now, in the embodiment of the present invention, the arc-shaped discharge portion 10b of the discharge electrode 10 on the energizing side is shown in FIGS. 1 and 4.
As shown in , it extends in the track direction and is located in a virtual plane in the track direction that passes through the central axis O of the left suspension insulator chain 4,
On the other hand, the ground-side discharge electrode 19 is disposed perpendicular to the virtual plane and approximately near the center of the arc of the discharge section 10b as shown in FIG. When the suspension insulator chain 4 swings in the left-right (track) direction as shown in FIG. 3 about the ground-side suspension fitting 3, even if the discharge electrode 10 on the energized side is displaced as shown by the chain line in the figure. , the aerial discharge gap G between both discharge electrodes 10 and 19 is kept constant.
【0013】又、図4に示すように送電線9が線路直交
方向に揺動した場合には、課電側の放電電極10は課電
側の吊下金具5とともに左側の懸垂碍子連4の上部吊下
点Pを中心とするほぼ円弧状軌跡Tで示すように揺動す
るが、この放電電極10の円弧状放電部10bの先端と
、接地側の棒状放電電極19との放電間隙Gがほぼ一定
に保たれる。この結果、送電線Lが揺動しても避雷装置
本体14の放電特性が安定化する。Further, when the power transmission line 9 swings in the direction perpendicular to the line as shown in FIG. The discharge electrode 10 oscillates as shown by a substantially arcuate locus T centered at the upper suspension point P, but the discharge gap G between the tip of the arcuate discharge portion 10b of the discharge electrode 10 and the rod-shaped discharge electrode 19 on the ground side is remains almost constant. As a result, even if the power transmission line L swings, the discharge characteristics of the lightning arrester main body 14 are stabilized.
【0014】なお、この発明は次のように具体化するこ
ともできる。前記実施例では避雷装置本体14を両懸垂
碍子連4,4の中央部に配置したが、この位置を支持ア
ーム1の先端部寄りに配置したり、避雷装置本体14を
水平に支持したりすることもできる。又、前記棒状放電
部19bを図4において前記円弧軌跡Tと平行な円弧状
に形成することにより、気中放電間隙Gを一定に保持す
るようにすることもできる。Note that the present invention can also be embodied as follows. In the embodiment described above, the lightning arrester main body 14 was placed in the center of both suspended insulator chains 4, 4, but this position may be placed closer to the tip of the support arm 1, or the lightning arrester main body 14 may be supported horizontally. You can also do that. Further, by forming the rod-shaped discharge portion 19b in an arc shape parallel to the arc locus T in FIG. 4, the aerial discharge gap G can be kept constant.
【0015】[0015]
【発明の効果】以上詳述したように、この発明は送電線
が線路方向あるいは線路直交方向に揺動しても、課電側
の放電電極と接地側の放電電極との気中放電間隙を一定
に保持して、避雷装置としての放電特性を安定化するこ
とができる効果がある。Effects of the Invention As detailed above, the present invention maintains the air discharge gap between the discharge electrode on the energized side and the discharge electrode on the ground side even if the power transmission line swings in the line direction or in the direction perpendicular to the line. This has the effect of stabilizing the discharge characteristics of the lightning arrester by keeping it constant.
【図1】この発明を具体化した一実施例を示す正面図で
ある。FIG. 1 is a front view showing an embodiment embodying the present invention.
【図2】図1の平面図である。FIG. 2 is a plan view of FIG. 1;
【図3】図1の左側面図である。FIG. 3 is a left side view of FIG. 1.
【図4】送電線が線路直交方向へ揺動したときの放電電
極の位置関係を示す説明図である。FIG. 4 is an explanatory diagram showing the positional relationship of discharge electrodes when the power transmission line swings in a direction perpendicular to the line.
1 支持アーム、2 取付金具、3 接地側吊下
金具、4 懸垂碍子連、5課電側吊下金具、6 連
結ヨーク、10 課電側の放電電極、10b 円弧
状放電部、13 取付アダプタ、14 避雷装置本
体、19 接地側の放電電極、19b 棒状放電部
、G 気中放電間隙、L 送電線。1 Support arm, 2 Mounting bracket, 3 Grounding side hanging bracket, 4 Suspension insulator chain, 5 Loading side hanging bracket, 6 Connection yoke, 10 Loading side discharge electrode, 10b Arc-shaped discharge part, 13 Mounting adapter, 14 Lightning arrester main body, 19 Earthing side discharge electrode, 19b Rod-shaped discharge part, G Air discharge gap, L Power transmission line.
Claims (1)
して一対の懸垂碍子連の上端部をそれぞれ連結するとと
もに、両懸垂碍子連の下端部間には課電側吊下金具をそ
れぞれ連結し、両課電側吊下金具間には前記両懸垂碍子
連がほぼV字型になるように連結ヨークにより線路方向
及び線路直交方向への揺動可能に連結し、該連結ヨーク
には電線クランプを介して送電線を支持し、前記支持ア
ームには取付アダプタを介して避雷装置本体を装着し、
前記両課電側吊下金具の一方の吊下金具には、円弧状を
なす課電側の放電電極を線路方向とほぼ同方向へ延出す
るとともに、該放電電極の円弧状放電部を斜めの懸垂碍
子連軸線に沿って下向の凸状に配置し、さらに前記避雷
装置本体の先端部に対し前記課電側の放電電極と所定の
気中放電間隙をもって対向する棒状の放電電極を、前記
円弧状放電部を通る平面とほぼ直交するように、かつ該
円弧状放電部の円弧中心付近に配置したことを特徴とす
るV吊碍子装置用避雷装置。Claim 1: The upper ends of a pair of suspended insulator chains are connected to the support arm through ground side hanging fittings, and the energized side hanging fittings are respectively connected between the lower ends of both suspension insulator chains. Between the two energized side hanging fittings, the two suspension insulator chains are connected so as to be swingable in the direction of the line and in the direction perpendicular to the line, so as to form a substantially V-shape, and the connection yoke is connected to an electric wire. A power transmission line is supported via a clamp, and a lightning arrester main body is attached to the support arm via a mounting adapter,
On one of the two power-supplying-side hanging fixtures, an arc-shaped discharge electrode on the power-supplying side extends in substantially the same direction as the line direction, and the arc-shaped discharge part of the discharge electrode is extended diagonally. A rod-shaped discharge electrode is arranged in a downward convex shape along the suspension insulator link axis, and further faces the discharge electrode on the energized side with a predetermined aerial discharge gap with respect to the tip of the lightning arrester main body, A lightning arrester for a V-suspended insulator device, characterized in that the lightning arrester is disposed approximately perpendicular to a plane passing through the arcuate discharge portion and near the center of the arc of the arcuate discharge portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3047791A JP2941973B2 (en) | 1991-02-25 | 1991-02-25 | Lightning arrester for V-suspension device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3047791A JP2941973B2 (en) | 1991-02-25 | 1991-02-25 | Lightning arrester for V-suspension device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04269408A true JPH04269408A (en) | 1992-09-25 |
JP2941973B2 JP2941973B2 (en) | 1999-08-30 |
Family
ID=12304933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3047791A Expired - Lifetime JP2941973B2 (en) | 1991-02-25 | 1991-02-25 | Lightning arrester for V-suspension device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2941973B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109767886B (en) * | 2019-03-27 | 2021-01-12 | 长沙理工大学 | 10kV insulated conductor lightning protection device for preventing breakage and installation distance determining method |
-
1991
- 1991-02-25 JP JP3047791A patent/JP2941973B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2941973B2 (en) | 1999-08-30 |
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