JPH01220315A - Lighting protection insulator set - Google Patents

Abstract

PURPOSE:To make a discharge interval always retainable constantly even if a strain insulator swingingly moves by forming discharge electrodes of charge and discharge sides so that both electrodes are made to a circular state even a strain insulator swingingly moves in the vertical or right and left direction with the insulator's base end attached point as the center. CONSTITUTION:The discharge electrode 17 at the charge side is extended in the lateral direction, and when the discharge electrode is swingingly moved in the horizontal direction with the attached point of a strain insulator as the center in the plane state, the discharge electrode is formed in a circular state, on the other hand, formed in a circular state concentrically with the locus in which the strain insulator is swingingly moves in the vertical direction with the attached point to a steel tower as the center. This enables the discharge gap G of both discharge electrodes 17 and 26 to always retainable constantly even a suspended insulator string 7 swingingly moves in the vertical or right and left direction with its attached point as the center. Consequently a lightning protection characteristic can be stabilized since discharging and the disconnection of a dynamic current can be surely conducted in the discharge gap G having an unvariable space when a lightning surge enters a transmission line.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は雷サージによる高電圧が送電線に印加されたと
き、それを速やかに大地へ放電するとともに、その後生
じる続流を限流素子により遮断し、地絡事故の発生を防
止する避雷碍子装置に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention quickly discharges high voltage caused by lightning surge to the ground when it is applied to a power transmission line, and uses a current limiting element to prevent the following current from occurring. This invention relates to a lightning arrester device that prevents ground faults from occurring.

さらに詳しくは、送電線側の放電電極と避雷碍子側の放
電電極との放電間隙を常に一定に保持して、避雷特性を
安定化することができる避雷碍子装置に関するものであ
る。More specifically, the present invention relates to a lightning arrester device capable of stabilizing lightning protection characteristics by always maintaining a constant discharge gap between a discharge electrode on the power transmission line side and a discharge electrode on the lightning arrester side.

（従来の技術） 従来、塔体の支持アームに対し耐張碍子を介して送電線
を架設支持するとともに、該耐張碍子の課電側端部には
ホーン状をなす課電側の放電電極を片持ち支持し、一方
、前記支持アームには取付アダプタを介して避雷碍子を
装着し、該避雷碍子の先端部には前記放電電極と気中放
電間隙をもって対向するホーン状をなす接地側の放電電
極を装着した送電線用避雷碍子装置が提案されている。(Prior art) Conventionally, a power transmission line is installed and supported on the support arm of a tower body via a tension insulator, and a horn-shaped discharge electrode on the power side is installed at the end of the tension insulator on the power side. On the other hand, a lightning arrester is attached to the support arm via a mounting adapter, and the tip of the lightning arrester has a horn-shaped ground side that faces the discharge electrode with an air discharge gap. Lightning arrester devices for power transmission lines equipped with discharge electrodes have been proposed.

（発明が解決しようとする課題） 上記従来の送１ｉｌｔ′ａ用避雷碍子装置は、耐張碍子
が上下方向あるいは左右方向に揺動すると、前記放電間
隙が変動するため、避雷特性が低下するという問題があ
った。(Problems to be Solved by the Invention) In the above-mentioned conventional lightning arrester device for transmission 1ilt'a, when the tension insulator swings vertically or horizontally, the discharge gap changes, so the lightning protection characteristics deteriorate. There was a problem.

本発明の目的は上記問題を解消して耐張碍子が揺動して
も放電間隙を常に一定に保持することができる送電線用
耐張碍子装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a tension insulator device for a power transmission line that can solve the above problems and maintain a constant discharge gap even if the tension insulator swings.

（課題を解決するための手段） 本発明は上記目的を達成するために、塔体の支持アーム
に対し耐張碍子を介して送電線を架設支持するとともに
、該耐張碍子の課電側端部には課電側の放電電極を片持
ち支持し、一方、前記支持アームには取付アダプタを介
して避雷碍子を装着し、該避雷碍子の先端部には前記放
電電極と気中放電間隙をもって対向する接地側の放電電
極を装着した送電線用避雷碍子装置において、前記課電
側の放電電極を横方向に張り出し、平面状態で該放電電
極が前記耐張碍子の鉄塔側取付点を中心にして水平方向
に揺動した場合に、前記放電間隙が一定となるように円
弧状に形成し、−方、前記接地側の放電電極を水平方向
から見て耐張碍子が鉄塔側取付点を中心に上下方向に揺
動する軌跡と同心状の円弧状に形成するという構成を採
用している。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention erects and supports a power transmission line through a tension insulator on a support arm of a tower body, and also A discharge electrode on the energized side is supported in a cantilever manner on the support arm, and a lightning arrester is attached to the support arm via a mounting adapter, and the tip of the lightning arrester is provided with an air discharge gap between the discharge electrode and the support arm. In a lightning arrester device for a power transmission line equipped with a discharge electrode on the opposing ground side, the discharge electrode on the energized side is extended laterally, and in a flat state, the discharge electrode is centered on the tower side attachment point of the tension insulator. When the discharge electrode is oscillated in the horizontal direction, the discharge gap is formed in an arc shape so that the discharge gap remains constant. The structure is such that it is formed in an arc shape that is concentric with the locus that swings in the vertical direction.

（作用） 上記構成を採用したことにより、耐張碍子がその基端取
付点を中心に上下あるいは左右方向へ揺動しても課電側
の放電電極と、接地側の放電電極が共に円弧状に形成さ
れているので、放電間隙が常に一定に保持される。この
結果避雷特性が安定化する。(Function) By adopting the above configuration, even if the tension insulator swings vertically or horizontally around its base end attachment point, both the discharge electrode on the energized side and the discharge electrode on the ground side are shaped like an arc. Since the discharge gap is always kept constant. As a result, lightning protection characteristics become stable.

（実施例） 以下、本発明を具体化した一実施例を図面に基づいて説
明する。(Example) Hereinafter, an example embodying the present invention will be described based on the drawings.

第１．３図中符号１は鉄塔本体（図示路）に水平に装着
した支持アームであって、その先端部には取付金具２が
ボルトにより固定されている。該取付金具２には連結ビ
ン３によりＵクレビス４が水平方向の回動可能に連結さ
れ、該Ｕクレビス４には接地側のアークホーン５を備え
たホーン取付金具６が連結され、該ホーン取付金具６に
は懸垂碍子を多数直列に連結してなる耐張碍子としての
懸垂碍子連７の一端が連結され、該懸垂碍子連７の課電
側端部にはソケットクレビス８を介して課電側のアーク
ホーン９を備えたホーン取付金具１０が連結されている
。又、前記ホーン取付金具１０には電線クランプ１１を
介して送電線１２が取着されている。さらに、前記両電
線クランプ１１には第２図に示すようにジャンパー線１
３が取着されている。Reference numeral 1 in FIG. 1.3 is a support arm mounted horizontally on the main body of the steel tower (the path shown), and a mounting bracket 2 is fixed to the tip of the support arm with a bolt. A U clevis 4 is horizontally rotatably connected to the mounting bracket 2 by a connecting pin 3, and a horn mounting bracket 6 equipped with an arc horn 5 on the grounding side is connected to the U clevis 4. One end of a suspension insulator chain 7, which is a tension insulator made by connecting a large number of suspension insulators in series, is connected to the metal fitting 6, and the end of the suspension insulator chain 7 on the energizing side is energized via a socket clevis 8. A horn mounting bracket 10 with a side arc horn 9 is connected. Further, a power transmission line 12 is attached to the horn mounting bracket 10 via an electric wire clamp 11. Further, a jumper wire 1 is attached to both wire clamps 11 as shown in FIG.
3 is attached.

前記課電側のホーン取付金具１０には取付金具１４がボ
ルト１５により固定され、該取付金具１４の上下両端部
には連結具１６が溶着され、該連結具１６には第３図に
示すようにヘアピン状をなす課電側の放電電極１７の両
端部が溶接固定されている。この放電電極１７は第１図
に示すように平面状態で前記懸垂碍子連７か基端取付点
（連結ピン３）を中心として水平方向へ回動した場合に
、後述する接地側の放電電極２６と所定の放電間隙Ｇを
常時確保できるように円弧状に形成している。A mounting bracket 14 is fixed to the horn mounting bracket 10 on the energizing side with bolts 15, and a connector 16 is welded to both upper and lower ends of the mounting bracket 14. Both ends of a hairpin-shaped discharge electrode 17 on the power supply side are fixed by welding. When this discharge electrode 17 is rotated in the horizontal direction about the base end attachment point (connection pin 3) of the suspended insulator chain 7 in a flat state as shown in FIG. It is formed into an arc shape so that a predetermined discharge gap G can always be secured.

前記課電側のホーン取付金具１０には前記放電電極１７
の重量と均衡するバランスウェイト１８が装着されてい
る。The discharge electrode 17 is attached to the horn mounting bracket 10 on the power supply side.
A balance weight 18 that balances the weight of is attached.

一方、前記支持アーム１の中間部には上方へ立ち上がっ
て上部を水平に湾曲した取付アダプタ１９がボルトによ
り固定され、該取付アダプタ１９の先端下面には、避雷
碍子２０が吊下されている。この避雷碍子２０は、ＦＲ
Ｐ等よりなり、多数の放圧孔を形成した耐圧絶縁筒（図
示路）と、その内部に収容した電圧−電流特性が非直線
性の酸化亜鉛を主材とする限流素子（図示路）と、耐圧
絶縁筒の上下両端部に嵌合固定した接地側及び課電側の
電極２１．２２と、耐圧絶縁筒の外周に被覆したゴムモ
ールド２３とにより構成されている。そして上端部の電
極金具２１をボルトにより前記取付アダプタ１９に固定
することにより避雷碍子２０を吊下固定している。On the other hand, a mounting adapter 19 that rises upward and has a horizontally curved upper portion is fixed to the intermediate portion of the support arm 1 with a bolt, and a lightning arrester 20 is suspended from the lower surface of the tip of the mounting adapter 19. This lightning insulator 20 is FR
A voltage-resistant insulating cylinder (shown as shown) made of P, etc., with many pressure relief holes formed therein, and a current-limiting element (shown as shown) mainly made of zinc oxide with non-linear voltage-current characteristics housed inside the cylinder. It is composed of electrodes 21 and 22 on the grounding side and the power supply side that are fitted and fixed to both the upper and lower ends of the voltage-resistant insulating cylinder, and a rubber mold 23 that covers the outer periphery of the voltage-resistant insulating cylinder. The lightning arrester 20 is suspended and fixed by fixing the upper end electrode fitting 21 to the mounting adapter 19 with bolts.

なお、前記避雷碍子２０の電極金具２１．２２にはそれ
ぞれゴムモールド２３の沿面閃絡を防止するためのアー
キングリング（図示路）が取着されている。Incidentally, arcing rings (shown in the figure) are attached to the electrode fittings 21 and 22 of the lightning arrester 20, respectively, to prevent creeping flash of the rubber mold 23.

前記避雷碍子２０の下端に位置する課電側の電極金具２
２には取付金具２４が一体に形成され、該取付金具２４
にはボルトにより板状のブラケット２５が水平方向に、
かつ第１図に示すように線路方向（同図の左右方向）と
平行に片持ち支持され、該ブラケット２５の先端部には
ループ状をなす接地側の放電電極２６が上下方向に取着
されている。この放電電極２６は、第２図に示すように
線路直交方向（同図の紙面と直交する方向）からみて、
前記懸垂碍子連７の取付点（Ｕクレビス４）を中心とす
る上下方向の回動軌跡Ｔと同心状の円弧状に形成されて
いる。そして、前記課電側の放電電極１７と接地側の放
電電極２６との間に、所定の気中放電間隙Ｇが形成され
るようにしている。Electrode fitting 2 on the charging side located at the lower end of the lightning arrester 20
2 is integrally formed with a mounting bracket 24, and the mounting bracket 24
The plate-shaped bracket 25 is horizontally moved by bolts,
As shown in FIG. 1, the bracket 25 is supported in a cantilever parallel to the line direction (left-right direction in the figure), and a loop-shaped ground-side discharge electrode 26 is attached vertically to the tip of the bracket 25. ing. As shown in FIG. 2, this discharge electrode 26 is
It is formed in an arcuate shape concentric with the vertical rotation locus T centered on the attachment point (U clevis 4) of the suspension insulator chain 7. A predetermined aerial discharge gap G is formed between the discharge electrode 17 on the energized side and the discharge electrode 26 on the ground side.

上記のように構成された避雷碍子装置についてその作用
を説明する。The operation of the lightning arrester device configured as described above will be explained.

雷サージが送電線１２に印加された場合、サージ電流は
電線クランプ１１ホーン取付金具１０、取付金具１４、
連結具１６及び課電側の放電電極１７から接地側の放電
電極２６ヘフランシオーバされ、接地側の放電電極２６
からブラケット２５、取付金具２４及び避雷碍子２０の
課電側電極金具２２に至る。このサージ電流はさらに電
極金具２２から限流素子（図示路）を貫通して電極金具
２１へと流れ、取付アダプタ１９及び支持アーム１を経
て鉄塔本体へ至りアースされる。When a lightning surge is applied to the power transmission line 12, the surge current flows through the wire clamp 11, the horn mounting bracket 10, the mounting bracket 14,
The connection tool 16 and the discharge electrode 17 on the energized side are transferred to the discharge electrode 26 on the ground side, and the discharge electrode 26 on the ground side
to the bracket 25, the mounting fitting 24, and the power-supplying side electrode fitting 22 of the lightning arrester 20. This surge current further flows from the electrode fitting 22 through the current limiting element (path shown) to the electrode fitting 21, passes through the mounting adapter 19 and the support arm 1, reaches the tower main body, and is grounded.

そして、その後に生ずる続流は、前記気中放電間隙Ｇと
避雷碍子２０内の限流素子（図示路）により遮断される
。Subsequent currents that occur thereafter are blocked by the air discharge gap G and the current limiting element (path shown) in the lightning arrester 20.

さて、本発明実施例では課電側の放電電極１７を第１図
に示すように円弧状に形成するとともに、接地側の放電
電極２６を第２図に示すように円弧状に形成したので、
懸垂碍子連７がその取付点を中心に上下方向あるいは左
右方向に揺動しても、両放電電極１７．２６の放電間隙
Ｇを常に一定に保持することができる。従って、雷サー
ジが送電線に侵入した場合に、間隔が不変の放電間隙Ｇ
間で確実に放電を行うことができ、かつ続流の遮断も確
実に行うことができ、避雷特性を安定化することができ
る。Now, in the embodiment of the present invention, the discharge electrode 17 on the energized side is formed in an arc shape as shown in FIG. 1, and the discharge electrode 26 on the ground side is formed in an arc shape as shown in FIG.
Even if the suspended insulator chain 7 swings vertically or horizontally about its attachment point, the discharge gap G between the discharge electrodes 17, 26 can always be kept constant. Therefore, when a lightning surge enters the transmission line, the discharge gap G whose spacing remains unchanged
It is possible to reliably perform discharge between the two, and also to reliably interrupt the following current, thereby making it possible to stabilize the lightning protection characteristics.

なお、本発明は次のように具体化することができる。Note that the present invention can be embodied as follows.

（１）　前記実施例では取付アダプタ１９を支持アーム
１の中間に取着したが、この取付アダプタ１９を支持ア
ームｌの先端部から外側方へ延長して、両放電電極１７
．２６を懸垂碍子連７の外側方で対向するようにするこ
と。(1) In the embodiment described above, the mounting adapter 19 was attached to the middle of the support arm 1, but by extending the attachment adapter 19 outward from the tip of the support arm l, both discharge electrodes 17
．． 26 to face the outside of the suspension insulator chain 7.

（２）　前記実施例では両放電電極１７．２６をいづれ
も二本線により形成したが、これを−本線とすること。(2) In the embodiment described above, both discharge electrodes 17, 26 were formed by two wires, but these should be made into -main wires.

（発明の効果） 以上詳述したように、本発明の避雷碍子装置は、耐張碍
子がその基端取付点を中心に上下あるいは左右方向へ揺
動しても、課電側の放電電極と接地側の放電電極の特異
な形状設定により放電間隙が常に一定に確保でき、雷撃
時の避雷特性を向上することができる効果がある。(Effects of the Invention) As described in detail above, the lightning arrester device of the present invention is able to maintain the connection between the discharge electrode on the energized side even when the tension insulator swings vertically or horizontally around its base end attachment point. The unique shape setting of the ground-side discharge electrode ensures a constant discharge gap at all times, which has the effect of improving lightning protection characteristics in the event of a lightning strike.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例を示す避雷碍子装置全体の平
面図、第２図は避雷碍子装置の前面図、第３図は避雷碍
子全体を示す右側面図である。 １・・・支持アーム、７・・・耐張碍子としての懸垂碍
子連、１０・・・課電側のホーン取付金具、１２・・・
送電線、１３・・・ジャンパー線、１４・・・取付金具
、１５・・・ボルト、１６・・・連結具、１７・・・課
電側の放電電極、１９・・・取付アダプタ、２０・・・
避雷碍子、２１（２２）・・・−接地側（課電側）の電
極金具、２４・・・取付金具、２５・・・ブラケット、
２６・・・接地側の放電電極、Ｇ・・・放電間隙、Ｔ・
・・回動軌跡。FIG. 1 is a plan view of the entire lightning arrester device showing one embodiment of the present invention, FIG. 2 is a front view of the lightning arrester device, and FIG. 3 is a right side view showing the entire lightning arrester device. DESCRIPTION OF SYMBOLS 1... Support arm, 7... Suspension insulator chain as a tension insulator, 10... Horn mounting bracket on power supply side, 12...
Power transmission line, 13...Jumper wire, 14...Mounting bracket, 15...Volt, 16...Connector, 17...Discharge electrode on power supply side, 19...Mounting adapter, 20...・・・
Lightning arrester, 21 (22)... - Earthing side (power side) electrode fitting, 24... Mounting fitting, 25... Bracket,
26...Discharge electrode on the ground side, G...Discharge gap, T.
...Rotation trajectory.

Claims (1)

【特許請求の範囲】 １、塔体の支持アーム（１）に対し耐張碍子（７）を介
して送電線（１２）を架設支持するとともに、該耐張碍
子（７）の課電側端部には課電側の放電電極（１７）を
片持ち支持し、一方、前記支持アーム（１）には取付ア
ダプタ（１９）を介して避雷碍子（２０）を装着し、該
避雷碍子（２０）の先端部には前記放電電極（１７）と
気中放電間隙（Ｇ）をもって対向する接地側の放電電極
（２６）を装着した送電線用避雷碍子装置において、 前記課電側の放電電極（１７）を横方向に張り出し、平
面状態で該放電電極（１７）が前記耐張碍子（７）の鉄
塔側取付点を中心にして水平方向に揺動した場合に、前
記放電間隙（Ｇ）が一定となるように円弧状に形成し、
一方、前記接地側の放電電極（２６）を水平方向から見
て耐張碍子（７）が鉄塔側取付点を中心に上下方向に揺
動する軌跡（Ｔ）と同心状の円弧状に形成したことを特
徴とする送電線用避雷碍子装置。[Claims] 1. A power transmission line (12) is installed and supported on the support arm (1) of the tower body via a tension insulator (7), and the power supply side end of the tension insulator (7) is supported. A discharge electrode (17) on the energized side is cantilever-supported on the support arm (1), and a lightning arrester (20) is attached to the support arm (1) via a mounting adapter (19). In a lightning arrester device for a power transmission line, in which a grounding side discharge electrode (26) facing the discharge electrode (17) with an air discharge gap (G) is attached to the tip of the energized side discharge electrode ( 17) is extended laterally, and when the discharge electrode (17) in a flat state swings horizontally around the attachment point on the steel tower side of the tension insulator (7), the discharge gap (G) is Formed in an arc shape so that it is constant,
On the other hand, when the discharge electrode (26) on the ground side is viewed from the horizontal direction, the tension insulator (7) is formed in an arc shape concentric with the locus (T) of swinging vertically around the attachment point on the steel tower side. A lightning arrester device for a power transmission line, which is characterized by: