JP3868104B2 - Switchgear - Google Patents

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Publication number
JP3868104B2
JP3868104B2 JP08233598A JP8233598A JP3868104B2 JP 3868104 B2 JP3868104 B2 JP 3868104B2 JP 08233598 A JP08233598 A JP 08233598A JP 8233598 A JP8233598 A JP 8233598A JP 3868104 B2 JP3868104 B2 JP 3868104B2
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Japan
Prior art keywords
conductor
electrode
side conductor
cover member
load
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Expired - Fee Related
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JP08233598A
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Japanese (ja)
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JPH11285117A (en
Inventor
聖一 宮本
孝行 糸谷
稔正 丸山
光政 寄田
武文 伊藤
巌 河又
俊則 木村
健一 小山
洋一 久森
卓 関谷
伸治 佐藤
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Priority to JP08233598A priority Critical patent/JP3868104B2/en
Priority to TW088111751A priority patent/TW426866B/en
Publication of JPH11285117A publication Critical patent/JPH11285117A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/58Electric connections to or between contacts; Terminals
    • H01H1/5822Flexible connections between movable contact and terminal
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/666Operating arrangements
    • H01H2033/6668Operating arrangements with a plurality of interruptible circuit paths in single vacuum chamber
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003Earthing switches
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、母線側導体と負荷側導体とを接離する主回路開閉部と、負荷側導体と接地用導体とを接離する接地開閉部とを備えるスイッチギヤに関する。
【0002】
【従来の技術】
母線からの受電を、各種の負荷機器、他の電気室に配電すべく用いられるスイッチギヤは、母線との接続のための母線側導体、負荷への送電ケーブルとの接続のための負荷側導体等の接続導体と共に、母線側導体と負荷側導体とを接離する主回路開閉器、負荷側導体を接地するための接地開閉器、監視制御に必要な制御機器等の内部機器を、接地金属製の外箱内に適宜に配設して構成されている。
【0003】
この種のスイッチギヤとして、特公平7-28488号公報に開示されているように、主たる内部機器としての主回路開閉器及び接地開閉器を接続導体の一部と共に一体化して構成された機能ユニットを備え、この機能ユニットを外箱内に配置して、母線及び送電ケーブルとの接続のみを行えばよい構成としたスイッチギヤがある。
【0004】
図5は、特公平7-28488号公報に開示されたスイッチギヤの要部構成を示す側断面図であり、図6は、図5に示したスイッチギヤの電気的接続図である。これらに示すスイッチギヤは、絶縁性ガスが封入され、その周壁の一部を内外に貫通する態様に送電ケーブル接続用のブッシング2aと、母線接続用のブッシング2b(図6参照)とを備える容器1の内部に、第1,第2,第3の開閉器3,4,5及び真空消弧室9を配した構成となっている。
【0005】
図6に示す如く、ブッシング2bを介して外部の母線(図示せず)に接続された三相の夫々に対応する母線側分岐導体6は、図5に示す如く、絶縁支持碍子11により支持されて絶縁性の容器1内に配設されており、これらは、真空消弧室9の内部に構成された図示しない開閉装置、及び第1の開閉器3を介して、絶縁支持碍子60a に固定支持された中間導体60に接続され、該中間導体60により2方向に分岐され、夫々の分岐は、第2,第3の開閉器4,5を介してブッシング2a,2aに支持された負荷側導体2,2に接続され、該負荷側導体2,2を経て外部の送電ケーブル(図示せず)にそれぞれ接続されている。
【0006】
開閉器3,4,5は、3対の金属リンク8,8,8及び絶縁リンク7,7,7を介して伝達される図示しない各別の駆動源の動作に応じて夫々の枢軸回りに揺動する揺動電極をそれぞれ備えている。第1の開閉器3は、その揺動電極の揺動位置によって、真空消弧室9内部の開閉装置の出力電極と前記中間導体60の対応位置に突設された固定電極とを接続する閉路位置と、前記揺動電極と接地用導体 10aとを接続する接地位置と、両位置の中間であり、前記固定電極及び接地用導体 10aから離れた断路位置とに変更し得るようになっている。
【0007】
また第2,3の開閉器4,5は、夫々の揺動電極の揺動により、負荷側導体2,2と中間導体60の対応位置に夫々突設された固定電極及び接地用導体 10b,10cとの間にて、第1の開閉器3と同様の3つの位置に変更し得るようになっている。
【0008】
以上の構成によれば、母線側分岐導体6と負荷側導体2とを接離する主回路開閉部と、負荷側導体2を接地するための接地開閉部とが、接続用の導体と共に容器1の内部に配設されており、母線側分岐導体6をブッシング2bを介して容器1外の母線に接続し、負荷側導体2,2をブッシング2a,2aを介して容器1外の送電ケーブルに接続すればよく、小型化されたスイッチギヤを提供することができる。
【0009】
ところが以上の如き従来のスイッチギヤにおいて、真空消弧室9内部の開閉装置は、当該回路を開閉する作用のみを行い、第1の開閉器3が、他の回路との切離しのための断路器と、前記開閉装置の出力電極を断路下にて接地する接地開閉器とを兼ね、更に第2,第3の開閉器4,5が、夫々に対応する負荷側導体2を接地する接地開閉器としての機能を果たす構成であり、母線側分岐導体6と負荷側導体2との間に2つの開閉器(第1の開閉器3及び第2の開閉器4、又は第1の開閉器3及び第3の開閉器5)が直列に配置されることから、これらの配置スペースを確保しなければならず、容器1を小型化するには限度があるという問題があった。
【0010】
また、容器1の内部には絶縁ガスが封入されており、前記開閉器3,4,5においては、三相の相間、対地間、断路位置での各極間に前記封入ガスの種類に応じた絶縁距離を確保する必要があり、前記開閉器3,4,5の夫々が大型化する上、各開閉器3,4,5間に十分な離隔距離を保つために、容器1内の配設効率が悪く、該容器1の小型化が制限されるという問題があった。
【0011】
また、真空消弧室9は、図6に示す三相回路において単相毎に設けられることから、これらの配設位置の確保のために容器1の小型化が制限され、また製品コストの上昇を招くという問題があった。
【0012】
更に、容器1の内部においてアーク短絡が発生した場合、容器1内に封入された絶縁性ガスが、アークエネルギーにより短時間の内に高温、高圧となる一種の爆発現象が引き起こされることから、前記容器1には、放圧のための開放弁を設ける必要がある上、放圧が完了するまでの間、高圧状態に耐える強度が要求されることとなり、容器1の構造が複雑化し、製品コストの上昇を招くという問題があった。
【0013】
そのため、次のようなスイッチギヤが提案されている。
図7及び図8は従来の他のスイッチギヤの要部構成を示す模式的側断面図であり、図7は後述する可撓導体を用いて主回路を構成した場合を、また図8はスライドコンタクトを用いて主回路を構成した場合をそれぞれ示している。図7に示した如く、内部を高真空に保持された真空容器20には母線用ブッシング22が取付けてあり、該母線用ブッシング22には、外部の母線が接続する母線側導体21を貫通させてある。
【0014】
母線側導体21の先端には主回路開閉部25の第1固定電極23が固定してあり、該第1固定電極23に対向して第1可動電極24が配してある。第1可動電極24は、第1導電性ロッド26の先端に固定してあり、第1導電性ロッド26の基端は絶縁ロッド29を介して、真空容器20の外部に配置してある駆動装置(図示せず)によって進退駆動される操作ロッド28に連結してある。操作ロッド28は真空容器20を貫通させてあり、操作ロッド28と真空容器20との間に介装させた第1ベローズ31によって真空容器20は気密状態に保持されている。
【0015】
前述した第1導電性ロッド26の中間部分には、金属環27が外嵌してある。真空容器20の前記金属環27の周面に対向する部分には、送電ケーブルを連結させる負荷側導体33を支持するケーブルブッシング34が取付けてあり、負荷側導体33の先端と金属環27との間には可撓導体40が架設してある。
【0016】
負荷側導体33の先端近傍には接地開閉部39の第2固定電極37が設けてあり、該第2固定電極37に対向して第2可動電極38が配してある。第2可動電極38は、真空容器20を貫通する第2導電性ロッド36の先端に取付けてあり、第2導電性ロッド36は、図示しない駆動装置によって進退駆動される。第2導電性ロッド36と真空容器20との間には第2ベローズ32が介装してあり、該第2ベローズ32によって真空容器20は気密状態に保持されている。
【0017】
また、図8に示したスイッチギヤにあっては、第1導電性ロッド26に環状のスライドコンタクト41が摺動自在に外嵌してあり、該スライドコンタクト41の周面に負荷側導体33が連結してある。
【0018】
このようなスイッチギヤでは、操作ロッド28を進退駆動して、該操作ロッド28、第1導電性ロッド26及び第1可動電極24を進退させ、第1可動電極24及び第1固定電極23を接離させることによって、主回路開閉部25を開閉させる。また、主回路開閉部25を開路した状態で、第2導電性ロッド36を進退させて、第2可動電極38及び第2固定電極37を接離させることによって、接地開閉部39を開閉する。
【0019】
主回路開閉部25を開閉させる場合、図7に示したスイッチギヤにあっては、第1導電性ロッド26の進退に伴って、可撓導体40が撓み、また撓んだ可撓導体40が復帰することによって、第1導電性ロッド26と負荷側導体33との間の導通を維持する。また、図8に示したスイッチギヤにあっては、第1導電性ロッド26を進退させた場合、それに外嵌してあるスライドコンタクト41との電気的導通状態を維持しながら、スライドコンタクト41内を摺動する。
【0020】
以上の如く構成されたスイッチギヤは、主回路開閉部25及び接地開閉部39が、接続用の導体としての母線側導体21、負荷側導体33及び接地用導体である第2導電性ロッド36と共に、真空に保たれた真空容器20の内部に収納され、絶縁特性に優れた真空中に主回路が構成されているから、夫々の間に必要な絶縁距離を削減することができ、特公平7-28488号公報に開示されたスイッチギヤに比べて小型化されたものとなり、更に、真空容器20の内部にアーク短絡が発生した場合においても、真空容器20の内部に気体が存在しないことから、前記アーク短絡が爆発につながる虞れがなく、高い安全性が得られる。
【0021】
【発明が解決しようとする課題】
しかしながら、図7又は図8に示したスイッチギヤでは、可撓導体40を真空容器20内に配置すべく、ベーキングして脱ガスする前処理を施し、更に、可撓導体40を母線側導体21及び負荷側導体33にろう付けするため、可撓導体40が加熱・放冷によって焼なまされる。この焼なましによって、可撓導体40の表面が清浄化され、清浄化された表面にアーク生成物が付着する凝着が発生する。この状態で、第1導電性ロッド26を進退駆動した場合、凝着の一部が磨耗し、導電性の凝着磨耗粉が飛散して真空容器20内が汚染されるという問題があった。また、可撓導体40の凝着が発生した部分に電界が集中して断線又は破断が発生する虞があった。
【0022】
また、前述した凝着は第1導電性ロッド26の周面にも発生する。その場合、図8に示した如き従来のスイッチギヤにあっては、第1導電性ロッド26がスライドコンタクト41内を円滑に摺動することが妨げられるため、スイッチギヤの故障の原因になる。そのため、第1導電性ロッド26のスライドコンタクト41が接触する部分にBNといった凝着防止材を塗布することが考えられる。しかし、第1導電性ロッド26とスライドコンタクト41との接触磨耗によって、凝着防止材が剥離するという問題があった。
【0023】
本発明はかかる事情に鑑みてなされたものであり、その目的とするところは、凝着防止材を用いることなく、可撓導体又は接触子の接触領域への凝着を防止して、安全性及び信頼性が高いスイッチギヤを提供することにある。
【0024】
【課題を解決するための手段】
第1発明に係るスイッチギヤは、真空容器内に装入してあり、外部の母線に接続する母線側導体及び外部の送電線に接続する負荷側導体と、前記母線側導体に設けた第1電極と、第2電極を支持し、該第2電極及び前記第1電極を接離する導電性のロッドと、該ロッド及び前記負荷側導体の間に架設した可撓導体とを備え、該可撓導体の周囲にそれを被覆するカバー部材が設けてあり、該カバー部材は有底筒状になしてあることを特徴とする。
また、第2発明に係るスイッチギヤは、真空容器内に装入してあり、外部の母線に接続する母線側導体及び外部の送電線に接続する負荷側導体と、前記母線側導体に設けた第1電極と、第2電極を支持し、該第2電極及び前記第1電極を接離する導電性のロッドと、該ロッド及び前記負荷側導体の間に架設した可撓導体とを備え、該可撓導体の周囲にそれを被覆するカバー部材が設けてあり、該カバー部材はベローズを具備した筒状をなし、開口は前記ロッド及び負荷側導体との当着面により閉塞されていることを特徴とする。
【0025】
発明に係るスイッチギヤは、真空容器内に装入してあり、外部の母線に接続する母線側導体及び外部の送電線に接続する負荷側導体と、前記母線側導体に設けた第1電極と、第2電極を支持し、該第2電極及び前記第1電極を接離する導電性のロッドと、前記負荷側導体に連結してあり、前記ロッドに接触する導電性の接触子とを備え、該接触子と前記ロッドとの接触部分を被覆するカバー部材が設けてあることを特徴とする。
【0026】
第1乃至第3発明にあっては、可撓導体、及び導電性のロッドと接触子との接触部分がカバー部材によって全体を覆ってあるため、可撓導体及び前記接触部分に凝着の摩耗による凝着導体摩耗粉の飛散が防止される。
また、第1発明にあっては、可撓導体、及び接触子とロッドとの接触部分が有底筒状のカバー部材によって全体を覆ってあるため、可撓導体及び前記接触部分の全周で、凝着の摩耗による凝着導体摩耗粉の飛散が防止される。
更にまた、第2発明にあっては、可撓導体、及び接触子とロッドとの接触部分がベローズで全体を覆ってあるため、凝着の摩耗による凝着導体摩耗粉の飛散が防止される。
【0027】
発明に係るスイッチギヤは、第発明において、前記カバー部材は有底筒状になしてあることを特徴とする。
【0028】
発明にあっては、可撓導体、及び接触子とロッドとの接触部分が有底筒状のカバー部材によって全体を覆ってあるため、可撓導体及び前記接触部分の全周で、凝着の摩耗による凝着導体摩耗粉の飛散が防止される。
【0029】
発明に係るスイッチギヤは、第発明において、前記カバー部材はベローズを具備することを特徴とする。
【0030】
発明にあっては、可撓導体、及び接触子とロッドとの接触部分がベローズで全体を覆ってあるため、凝着の摩耗による凝着導体摩耗粉の飛散が防止される。
【0031】
【発明の実施の形態】
実施の形態1
以下本発明をその実施の形態を示す図面に基づいて詳述する。
図1は本発明に係るスイッチギヤの要部構成を示す模式的側断面図であり、図中20は内部を高真空に保持された真空容器である。真空容器20にはセラミックスを円錐台状に成形した母線用ブッシング22が取付けてあり、該母線用ブッシング22には、外部の母線が接続する母線側導体21を貫通させてある。
【0032】
母線側導体21の先端には主回路開閉部25の第1固定電極23が固定してあり、該第1固定電極23に対向して第1可動電極24が配してある。第1可動電極24は、第1導電性ロッド26の先端に固定してあり、第1導電性ロッド26の基端は絶縁ロッド29を介して、真空容器20の外部に配置してある駆動装置(図示せず)によって進退駆動される操作ロッド28に連結してある。操作ロッド28は真空容器20を貫通させてあり、操作ロッド28と真空容器20との間に介装させた第1ベローズ31によって真空容器20は気密状態に保持されている。
【0033】
第1導電性ロッド26の中間部分には、金属環27が外嵌してある。真空容器20の前記金属環27の周面に対向する部分には、送電ケーブルを連結させる負荷側導体33を支持するケーブルブッシング34が取付けてある。負荷側導体33の先端近傍には接地開閉部39の第2固定電極37が設けてあり、該第2固定電極37に対向して第2可動電極38が配してある。第2可動電極38は、真空容器20を貫通する第2導電性ロッド36の先端に取付けてあり、第2導電性ロッド36は、図示しない駆動装置によって進退駆動される。また、第2導電性ロッド36は設置してある。第2導電性ロッド36と真空容器20との間には第2ベローズ32が介装してあり、該第2ベローズ32によって真空容器20は気密状態に保持されている。
【0034】
前述した金属環27の負荷側導体33に対向する部分には、有底筒状の第1カバー部材51が、その底部を金属環27の周面に当接させた状態で取付けてある。第1カバー部材51の軸長方向の寸法は、金属環27と負荷側導体33との間の寸法より少し短くしてあり、第1カバー部材51の周縁部は内側へ屈曲させてある。
【0035】
また、負荷側導体33には、第1カバー部材51の形状と相似しており、そのサイズが小さい第2カバー部材52が、その底部を負荷側導体33の先端に当接させ、先端部分を第1カバー部材51内へ進入させた様態で取付けてある。第1カバー部材51の内底部及び第2カバー部材52の内底部には穴がそれぞれ開設してあり、金属環27及び負荷側導体33の両穴に対向する部分には、ダブルアーチ状の可撓導体40が架設してある。
【0036】
このようなスイッチギヤでは、操作ロッド28を進退駆動して、該操作ロッド28、第1導電性ロッド26及び第1可動電極24を進退させ、第1可動電極24及び第1固定電極23を接離させることによって、主回路開閉部25を開閉させる。また、主回路開閉部25を開路した状態で、第2導電性ロッド36を進退させて、第2可動電極38及び第2固定電極37を接離させることによって、接地開閉部39を開閉する。
【0037】
主回路開閉部25を開閉させる場合、第1導電性ロッド26の進退に伴って、可撓導体40が撓み、また撓んだ可撓導体40が復帰することによって、第1導電性ロッド26と負荷側導体33との間の導通が維持される。一方、可撓導体40の周囲は両カバー部材51,52で全体を覆ってあるため、主回路開閉部25の開閉動作によって生じるアーク生成物可撓導体40への凝着の摩耗による凝着導体摩耗粉の飛散することが防止される。
【0038】
なお、本実施の形態では、対向配置した第1カバー部材51及び第2カバー部材52によって可撓導体40を覆ってあるが、本発明はこれに限らず、第1カバー部材51又は第2カバー部材52の一方を設けるようにしてもよい。この場合、カバー部材の軸長方向の寸法を可撓導体40の寸法より長くしておく。
【0039】
実施の形態2
図2は実施の形態2を示す模式的側断面図であり、ベローズ41を用いた場合を示している。なお、図中、図1に示した部分に対応する部分には同じ番号を付してその説明を省略する。図2に示した如く、金属環27と負荷側導体33との間には可撓導体40が架設してあり、可撓導体40は筒状の第3ベローズ61内に収納してある。第3ベローズ61の一端は金属環27の周面に固定してあり、他端は負荷側導体33に外嵌してある。これによって、可撓導体40へのアーク生成物の付着を更に防止することができる。
【0040】
実施の形態3
図3は実施の形態3を示す模式的側断面図であり、スライドコンタクト41を用いた場合を示している。なお、図中、図1に示した部分に対応する部分には同じ番号を付してその説明を省略する。図3に示した如く、第1導電性ロッド26には、図1に示した金属環27に代えて、環状のスライドコンタクト41が摺動自在に外嵌してあり、該スライドコンタクト41の周面に負荷側導体33が連結してある。
【0041】
第1導電性ロッド26のスライドコンタクト41の上下端から所定距離を隔てた位置には、スライドコンタクト41を覆う櫃状の第3カバー部材53及び第4カバー部材54が外嵌固定してあり、第3カバー部材53及び第4カバー部材54の負荷側導体33に対応する部分には、切り欠きが設けてある。
【0042】
このようなスイッチギヤにあっては、第1導電性ロッド26を進退させた場合、それに外嵌してあるスライドコンタクト41との電気的導通状態を維持しながら、第1導電性ロッド26がスライドコンタクト41内を摺動する。このとき、第1導電性ロッド26と共に第4カバー部材54が進退する。第4カバー部材54は、第1可動電極24を第1固定電極23に接触させた場合、スライドコンタクト41と第4カバー部材54の底部との間に適宜のギャップが生じるように第1導電性ロッド26に固定してあり、また、第4カバー部材54の軸長方向の寸法は、第1可動電極24を第1固定電極23から開離させた場合、その上縁部が第3カバー部材53内に位置するようになしてある。これによって、主回路開閉部25の開閉動作によって生じるアーク生成物、第1導電性ロッド26のスライドコンタクト41に接触する部分への凝着の摩耗による凝着導体摩耗粉の飛散することが防止される。
【0043】
なお、本実施の形態では、対向配置した第3カバー部材53及び第4カバー部材54によってスライドコンタクト41を覆ってあるが、本発明はこれに限らず、第3カバー部材53のみを設けるようにしてもよい。この場合、第3カバー部材53の軸長方向の寸法を適宜長くしておく。
【0044】
実施の形態4
図4は実施の形態4を示す模式的側断面図であり、ベローズを用いた場合を示している。なお、図中、図3に示した部分に対応する部分には同じ番号を付してその説明を省略する。図4に示した如く、第1導電性ロッド26にはスライドコンタクト41が摺動自在に外嵌してあり、第1導電性ロッド26のスライドコンタクト41の上端から所定距離を隔てた位置及びスライドコンタクト41の下端には、スライドコンタクト41の直径より大きい直径の円板の中央に穴が開設してある環状板45,46が外嵌してある。スライドコンタクト41の上縁部とそれに対向する環状板45との間には、筒状の第4ベローズ62が設けてあり、スライドコンタクト41の下端に設けた環状板46と操作ロッド28との間には、筒状の第5ベローズ63が設けてある。
【0045】
このようなスイッチギヤにあっては、第1導電性ロッド26を進退させた場合、それに外嵌してあるスライドコンタクト41との電気的導通状態を維持しながら、第1導電性ロッド26がスライドコンタクト41内を摺動する。このとき、第1導電性ロッド26の進退に伴って、第5ベローズ63が伸縮する。これによって、主回路開閉部25の開閉動作によって生じるアーク生成物、第1導電性ロッド26のスライドコンタクト41に接触する部分への凝着の摩耗による凝着導体摩耗粉の飛散することが防止される。
【0046】
【発明の効果】
以上詳述した如く第1乃至第3発明に係るスイッチギヤにあっては、可撓導体、及び接触子とロッドとの接触部分に凝着の摩耗による凝着導体摩耗粉の飛散が防止されるため、安全性及び信頼性が高い。
【0047】
また、1及び第4発明に係るスイッチギヤにあっては、可撓導体及び前記接触部分の全周で、凝着の摩耗による凝着導体摩耗粉の飛散が防止される。
【0048】
また、2及び第5発明に係るスイッチギヤにあっては、可撓導体、及び接触子とロッドとの接触部分がベローズで全体を覆ってあるため、凝着の摩耗による凝着導体摩耗粉の飛散が防止される等、本発明は優れた効果を奏する。
【図面の簡単な説明】
【図1】 本発明に係るスイッチギヤの要部構成を示す模式的側断面図である。
【図2】 実施の形態2を示す模式的側断面図である。
【図3】 実施の形態3を示す模式的側断面図である。
【図4】 実施の形態4を示す模式的側断面図である。
【図5】 従来のスイッチギヤの要部構成を示す側断面図である。
【図6】 図5に示したスイッチギヤの電気的接続図である。
【図7】 従来の他のスイッチギヤの要部構成を示す模式的側断面図である。
【図8】 従来の他のスイッチギヤの要部構成を示す模式的側断面図である。
【符号の説明】
20 真空容器、21 母線側導体、22 母線用ブッシング、34 ケーブルブッシング、25 主回路開閉部、33 負荷側導体、39 接地開閉部、40 可撓導体、
41 スライドコンタクト、51 第1カバー部材、52 第2カバー部材、53 第3カバー部材、54 第4カバー部材、61 第3ベローズ、62 第4ベローズ、
63 第5ベローズ。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switchgear that includes a main circuit opening / closing portion that contacts and separates a bus-side conductor and a load-side conductor, and a ground opening / closing portion that contacts and separates a load-side conductor and a grounding conductor.
[0002]
[Prior art]
The switchgear used to distribute the power received from the busbar to various load devices and other electrical rooms consists of a busbar conductor for connection to the busbar and a loadside conductor for connection to the power transmission cable to the load. In addition to connecting conductors such as the main circuit switch that connects and disconnects the bus-side conductor and load-side conductor, the ground switch for grounding the load-side conductor, and internal devices such as control devices required for monitoring and control, It is configured by being appropriately arranged in a manufactured outer box.
[0003]
As this type of switchgear, as disclosed in Japanese Examined Patent Publication No. 7-28488, a functional unit constructed by integrating a main circuit switch and a ground switch as main internal devices together with a part of a connection conductor. There is a switchgear in which this functional unit is arranged in the outer box and only the connection with the bus and the power transmission cable is required.
[0004]
FIG. 5 is a side sectional view showing a configuration of a main part of the switchgear disclosed in Japanese Patent Publication No. 7-28488, and FIG. 6 is an electrical connection diagram of the switchgear shown in FIG. The switchgear shown here is a container provided with a bushing 2a for connecting a power transmission cable and a bushing 2b for connecting a busbar (see FIG. 6) in such a manner that an insulating gas is sealed and a part of the peripheral wall penetrates inside and outside. 1, the first, second and third switches 3, 4, 5 and the vacuum arc extinguishing chamber 9 are arranged.
[0005]
As shown in FIG. 6, the bus-side branch conductors 6 corresponding to each of the three phases connected to the external bus (not shown) via the bushing 2b are supported by an insulating support insulator 11, as shown in FIG. These are fixed in an insulating support insulator 60a via a switch (not shown) configured in the inside of the vacuum arc extinguishing chamber 9 and the first switch 3. Connected to the supported intermediate conductor 60 and branched in two directions by the intermediate conductor 60. Each branch is on the load side supported by the bushings 2a, 2a via the second and third switches 4, 5. The conductors 2 and 2 are connected to each other, and the load-side conductors 2 and 2 are connected to an external power transmission cable (not shown).
[0006]
The switches 3, 4, and 5 are arranged around their respective pivots in response to the operation of each other driving source (not shown) transmitted through the three pairs of metal links 8, 8, 8 and the insulating links 7, 7, 7. Each has a swinging electrode that swings. The first switch 3 is a closed circuit that connects the output electrode of the switchgear inside the vacuum arc extinguishing chamber 9 and the fixed electrode protruding from the corresponding position of the intermediate conductor 60 according to the swing position of the swing electrode. Position, a grounding position connecting the swing electrode and the grounding conductor 10a, and an intermediate position between the two positions, and can be changed to a disconnecting position away from the fixed electrode and the grounding conductor 10a. .
[0007]
The second and third switches 4 and 5 have fixed electrodes and grounding conductors 10b, 10b, which are respectively provided at the corresponding positions of the load side conductors 2 and 2 and the intermediate conductor 60 by the swing of the swing electrodes. The position can be changed to the same three positions as the first switch 3 between 10c.
[0008]
According to the above configuration, the main circuit opening / closing part for connecting / separating the bus-side branch conductor 6 and the load-side conductor 2 and the ground opening / closing part for grounding the load-side conductor 2 together with the connection conductor 1 The bus-side branch conductor 6 is connected to the bus outside the container 1 via the bushing 2b, and the load-side conductors 2 and 2 are connected to the power transmission cable outside the container 1 via the bushings 2a and 2a. What is necessary is just to connect, and the switch gear reduced in size can be provided.
[0009]
However, in the conventional switchgear as described above, the switchgear inside the vacuum arc extinguishing chamber 9 performs only the action of opening and closing the circuit, and the first switch 3 is a disconnector for disconnecting from other circuits. And a grounding switch for grounding the output electrode of the switchgear device under disconnection, and further, the second and third switches 4 and 5 are grounding switches for grounding the corresponding load-side conductors 2 respectively. And the two switches (the first switch 3 and the second switch 4, or the first switch 3 and the switch between the bus-side branch conductor 6 and the load-side conductor 2). Since the third switch 5) is arranged in series, it is necessary to secure these arrangement spaces, and there is a problem that there is a limit in reducing the size of the container 1.
[0010]
Further, an insulating gas is sealed inside the container 1, and in the switches 3, 4 and 5, depending on the type of the sealed gas between the three phases, between the ground and between each pole at the disconnection position. In order to maintain a sufficient separation distance between the switches 3, 4, 5, and to increase the size of each of the switches 3, 4, 5, it is necessary to secure an insulation distance. There was a problem that installation efficiency was poor and miniaturization of the container 1 was restricted.
[0011]
Further, since the vacuum arc extinguishing chamber 9 is provided for each single phase in the three-phase circuit shown in FIG. 6, the miniaturization of the container 1 is restricted in order to secure these arrangement positions, and the product cost increases. There was a problem of inviting.
[0012]
Further, when an arc short circuit occurs inside the container 1, the insulating gas sealed in the container 1 causes a kind of explosion phenomenon that becomes high temperature and high pressure within a short time due to arc energy. The container 1 needs to be provided with an open valve for releasing pressure, and is required to have a strength that can withstand a high pressure state until the releasing pressure is completed. There was a problem of inviting a rise.
[0013]
Therefore, the following switch gear has been proposed.
7 and 8 are schematic side sectional views showing the configuration of the main part of another conventional switchgear. FIG. 7 shows a case where a main circuit is configured using a flexible conductor described later, and FIG. 8 shows a slide. A case where the main circuit is configured using contacts is shown. As shown in FIG. 7, a bus bar bushing 22 is attached to a vacuum vessel 20 whose interior is maintained at a high vacuum, and a bus bar side conductor 21 connected to an external bus bar is passed through the bus bar bushing 22. It is.
[0014]
A first fixed electrode 23 of the main circuit opening / closing portion 25 is fixed to the front end of the bus-side conductor 21, and a first movable electrode 24 is disposed to face the first fixed electrode 23. The first movable electrode 24 is fixed to the distal end of the first conductive rod 26, and the base end of the first conductive rod 26 is disposed outside the vacuum vessel 20 via the insulating rod 29. (Not shown) is connected to an operating rod 28 that is driven forward and backward. The operating rod 28 penetrates the vacuum vessel 20, and the vacuum vessel 20 is held in an airtight state by a first bellows 31 interposed between the operating rod 28 and the vacuum vessel 20.
[0015]
A metal ring 27 is fitted on the intermediate portion of the first conductive rod 26 described above. A cable bushing 34 that supports a load-side conductor 33 that connects a power transmission cable is attached to a portion of the vacuum vessel 20 that faces the peripheral surface of the metal ring 27, and the tip of the load-side conductor 33 and the metal ring 27 are connected to each other. A flexible conductor 40 is installed between them.
[0016]
Near the tip of the load-side conductor 33, a second fixed electrode 37 of the ground opening / closing part 39 is provided, and a second movable electrode 38 is disposed opposite the second fixed electrode 37. The second movable electrode 38 is attached to the tip of the second conductive rod 36 that penetrates the vacuum vessel 20, and the second conductive rod 36 is driven forward and backward by a driving device (not shown). A second bellows 32 is interposed between the second conductive rod 36 and the vacuum vessel 20, and the vacuum vessel 20 is held in an airtight state by the second bellows 32.
[0017]
In the switchgear shown in FIG. 8, an annular slide contact 41 is slidably fitted to the first conductive rod 26, and a load-side conductor 33 is provided on the peripheral surface of the slide contact 41. It is connected.
[0018]
In such a switchgear, the operating rod 28 is driven forward and backward to advance and retract the operating rod 28, the first conductive rod 26 and the first movable electrode 24, and the first movable electrode 24 and the first fixed electrode 23 are brought into contact with each other. The main circuit opening / closing part 25 is opened and closed by separating them. Further, with the main circuit opening / closing part 25 opened, the second conductive rod 36 is advanced and retracted to bring the second movable electrode 38 and the second fixed electrode 37 into contact with and away from each other, thereby opening and closing the ground opening / closing part 39.
[0019]
When the main circuit opening / closing portion 25 is opened and closed, in the switchgear shown in FIG. 7, the flexible conductor 40 bends as the first conductive rod 26 advances and retracts, and the flexible conductor 40 that is bent By returning, the conduction between the first conductive rod 26 and the load-side conductor 33 is maintained. Further, in the switchgear shown in FIG. 8, when the first conductive rod 26 is advanced and retracted, the electrical contact state with the slide contact 41 fitted on the first conductive rod 26 is maintained, and the inside of the slide contact 41 is maintained. Slide.
[0020]
In the switchgear configured as described above, the main circuit opening / closing portion 25 and the ground opening / closing portion 39 have the bus side conductor 21 as the connecting conductor, the load side conductor 33 and the second conductive rod 36 as the grounding conductor. Since the main circuit is housed in a vacuum container 20 that is kept in a vacuum and has excellent insulating properties, the required insulation distance can be reduced between them. In comparison with the switchgear disclosed in Japanese Patent No. -28488, and even when an arc short circuit occurs inside the vacuum vessel 20, there is no gas inside the vacuum vessel 20, There is no possibility of the arc short circuit leading to an explosion, and high safety can be obtained.
[0021]
[Problems to be solved by the invention]
However, in the switchgear shown in FIG. 7 or FIG. 8, in order to arrange the flexible conductor 40 in the vacuum vessel 20, pretreatment for baking and degassing is performed, and the flexible conductor 40 is further connected to the bus-side conductor 21. And in order to braze to the load side conductor 33, the flexible conductor 40 is annealed by heating and cooling. By this annealing, the surface of the flexible conductor 40 is cleaned, and adhesion occurs in which arc products adhere to the cleaned surface. When the first conductive rod 26 is driven back and forth in this state, there is a problem that a part of the adhesion is worn, and the conductive adhesion wear powder is scattered and the inside of the vacuum vessel 20 is contaminated. Further, there is a possibility that the electric field concentrates on the portion where the adhesion of the flexible conductor 40 has occurred, resulting in disconnection or breakage.
[0022]
Further, the above-mentioned adhesion also occurs on the peripheral surface of the first conductive rod 26. In that case, in the conventional switchgear as shown in FIG. 8, since the first conductive rod 26 is prevented from sliding smoothly in the slide contact 41, it causes a failure of the switchgear. Therefore, it is conceivable to apply an anti-adhesive material such as BN to the portion of the first conductive rod 26 where the slide contact 41 contacts. However, there is a problem that the anti-adhesive material is peeled off due to contact wear between the first conductive rod 26 and the slide contact 41.
[0023]
The present invention has been made in view of such circumstances, and the object of the present invention is to prevent adhesion of the flexible conductor or the contact to the contact area without using an adhesion preventing material, and to ensure safety. And providing a highly reliable switchgear.
[0024]
[Means for Solving the Problems]
The switch gear according to the first aspect of the present invention is installed in a vacuum vessel, and includes a bus-side conductor connected to an external bus and a load-side conductor connected to an external power transmission line, and a first provided on the bus-side conductor. An electrode, a conductive rod that supports the second electrode, contacts and separates the second electrode and the first electrode, and a flexible conductor that is laid between the rod and the load-side conductor. Deflection Ri Ah provided with a cover member for covering it around the conductor, characterized in that said cover member are without a bottomed cylindrical shape.
The switchgear according to the second invention is installed in the vacuum vessel, and is provided on the bus-side conductor connected to the external bus and the load-side conductor connected to the external power transmission line, and the bus-side conductor. A first electrode; a conductive rod that supports the second electrode, and contacts and separates the second electrode and the first electrode; and a flexible conductor provided between the rod and the load-side conductor. A cover member for covering the flexible conductor is provided around the flexible conductor, the cover member has a cylindrical shape with a bellows, and the opening is closed by a contact surface between the rod and the load-side conductor. It is characterized by.
[0025]
A switchgear according to a third aspect of the present invention is installed in a vacuum vessel, and includes a busbar-side conductor connected to an external busbar, a load-side conductor connected to an external power transmission line, and a first provided on the busbar-side conductor. An electrode, a conductive rod that supports the second electrode, contacts and separates the second electrode and the first electrode, and a conductive contact that is connected to the load-side conductor and contacts the rod And a cover member that covers a contact portion between the contact and the rod is provided.
[0026]
In the first to third inventions, since the contact portion between the flexible conductor and the conductive rod and the contact member is entirely covered by the cover member, the flexible conductor and the contact portion are worn by adhesion. Scattering of the adherent conductor wear powder due to is prevented.
In the first invention, the contact portion between the flexible conductor and the contactor and the rod is entirely covered with the bottomed cylindrical cover member, so that the entire circumference of the flexible conductor and the contact portion is provided. Scattering of adhered conductor wear powder due to adhesion wear is prevented.
Furthermore, in the second invention, since the contact portion between the flexible conductor and the contact and the rod is entirely covered with the bellows, scattering of the adhesion conductor abrasion powder due to adhesion abrasion is prevented. .
[0027]
According to a fourth aspect of the present invention, in the switch gear according to the third aspect , the cover member has a bottomed cylindrical shape.
[0028]
In the fourth aspect of the invention, the flexible conductor and the contact portion between the contact and the rod are entirely covered by the bottomed cylindrical cover member. Scattering of the adhered conductor wear powder due to wear of the adhesion is prevented.
[0029]
According to a fifth aspect of the present invention, in the switch gear according to the third aspect , the cover member includes a bellows.
[0030]
In the fifth invention, since the contact portion between the flexible conductor and the contact and the rod is entirely covered with the bellows, scattering of the adhesion conductor wear powder due to adhesion wear is prevented.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
FIG. 1 is a schematic side cross-sectional view showing a configuration of a main part of a switchgear according to the present invention. In the figure, reference numeral 20 denotes a vacuum container whose interior is maintained at a high vacuum. A bus bushing 22 made of ceramics in a truncated cone shape is attached to the vacuum vessel 20, and a bus-side conductor 21 to which an external bus is connected is passed through the bus bushing 22.
[0032]
A first fixed electrode 23 of the main circuit opening / closing portion 25 is fixed to the front end of the bus-side conductor 21, and a first movable electrode 24 is disposed to face the first fixed electrode 23. The first movable electrode 24 is fixed to the distal end of the first conductive rod 26, and the base end of the first conductive rod 26 is disposed outside the vacuum vessel 20 via the insulating rod 29. (Not shown) is connected to an operating rod 28 that is driven forward and backward. The operating rod 28 penetrates the vacuum vessel 20, and the vacuum vessel 20 is held in an airtight state by a first bellows 31 interposed between the operating rod 28 and the vacuum vessel 20.
[0033]
A metal ring 27 is fitted on the intermediate portion of the first conductive rod 26. A cable bushing 34 that supports a load-side conductor 33 that connects a power transmission cable is attached to a portion of the vacuum vessel 20 that faces the peripheral surface of the metal ring 27. Near the tip of the load-side conductor 33, a second fixed electrode 37 of the ground opening / closing part 39 is provided, and a second movable electrode 38 is disposed opposite the second fixed electrode 37. The second movable electrode 38 is attached to the tip of the second conductive rod 36 that penetrates the vacuum vessel 20, and the second conductive rod 36 is driven forward and backward by a driving device (not shown). The second conductive rod 36 is installed. A second bellows 32 is interposed between the second conductive rod 36 and the vacuum vessel 20, and the vacuum vessel 20 is held in an airtight state by the second bellows 32.
[0034]
A bottomed cylindrical first cover member 51 is attached to the portion of the metal ring 27 facing the load-side conductor 33 in a state where the bottom is in contact with the peripheral surface of the metal ring 27. The dimension of the first cover member 51 in the axial length direction is slightly shorter than the dimension between the metal ring 27 and the load-side conductor 33, and the peripheral portion of the first cover member 51 is bent inward.
[0035]
Further, the load-side conductor 33 is similar to the shape of the first cover member 51, and a second cover member 52 having a small size makes its bottom abut against the tip of the load-side conductor 33, and the tip portion is The first cover member 51 is attached so as to enter the first cover member 51. Holes are formed in the inner bottom portion of the first cover member 51 and the inner bottom portion of the second cover member 52, respectively, and a double arch-shaped acceptable portion is formed in the portions facing both holes of the metal ring 27 and the load side conductor 33. A flexible conductor 40 is installed.
[0036]
In such a switchgear, the operating rod 28 is driven forward and backward to advance and retract the operating rod 28, the first conductive rod 26 and the first movable electrode 24, and the first movable electrode 24 and the first fixed electrode 23 are brought into contact with each other. The main circuit opening / closing part 25 is opened and closed by separating them. Further, with the main circuit opening / closing part 25 opened, the second conductive rod 36 is advanced and retracted to bring the second movable electrode 38 and the second fixed electrode 37 into contact with and away from each other, thereby opening and closing the ground opening / closing part 39.
[0037]
When the main circuit opening / closing part 25 is opened and closed, the flexible conductor 40 bends as the first conductive rod 26 advances and retreats, and the bent flexible conductor 40 returns to the first conductive rod 26. The conduction with the load side conductor 33 is maintained. Meanwhile, since the periphery of the flexible conductor 40 are covered as a whole by both cover members 51 and 52, adhesion due to wear of the adhesion of the flexible conductor 40 of arc products resulting from the opening and closing operation of the main circuit switch section 25 The scattering of the conductor wear powder is prevented.
[0038]
In the present embodiment, the flexible conductor 40 is covered by the first cover member 51 and the second cover member 52 that are arranged to face each other. However, the present invention is not limited to this, and the first cover member 51 or the second cover is not limited thereto. One of the members 52 may be provided. In this case, the dimension of the cover member in the axial length direction is set longer than the dimension of the flexible conductor 40.
[0039]
Embodiment 2
FIG. 2 is a schematic side sectional view showing the second embodiment, and shows a case where a bellows 41 is used. In the figure, parts corresponding to those shown in FIG. As shown in FIG. 2, a flexible conductor 40 is installed between the metal ring 27 and the load side conductor 33, and the flexible conductor 40 is accommodated in a cylindrical third bellows 61. One end of the third bellows 61 is fixed to the peripheral surface of the metal ring 27, and the other end is externally fitted to the load side conductor 33. Thereby, it is possible to further prevent the arc product from adhering to the flexible conductor 40.
[0040]
Embodiment 3
FIG. 3 is a schematic side sectional view showing the third embodiment, and shows a case where a slide contact 41 is used. In the figure, parts corresponding to those shown in FIG. As shown in FIG. 3, an annular slide contact 41 is slidably fitted to the first conductive rod 26 in place of the metal ring 27 shown in FIG. A load-side conductor 33 is connected to the surface.
[0041]
A hook-like third cover member 53 and a fourth cover member 54 that cover the slide contact 41 are externally fitted and fixed at positions spaced apart from the upper and lower ends of the slide contact 41 of the first conductive rod 26. A portion corresponding to the load-side conductor 33 of the third cover member 53 and the fourth cover member 54 is provided with a notch.
[0042]
In such a switch gear, when the first conductive rod 26 is advanced and retracted, the first conductive rod 26 slides while maintaining an electrical conduction state with the slide contact 41 fitted on the first conductive rod 26. Slide in the contact 41. At this time, the fourth cover member 54 advances and retreats together with the first conductive rod 26. When the first movable electrode 24 is brought into contact with the first fixed electrode 23, the fourth cover member 54 has the first conductivity so that an appropriate gap is generated between the slide contact 41 and the bottom of the fourth cover member 54. The dimension of the fourth cover member 54 in the axial length direction is fixed to the rod 26. When the first movable electrode 24 is separated from the first fixed electrode 23, the upper edge portion of the fourth cover member 54 is the third cover member. It is supposed to be located in 53. Prevention Thus, arc products resulting from the opening and closing operation of the main circuit switch section 25, that splashing of adhesion conductor abrasion powder due to wear of the adhesion to the portion in contact with the sliding contact 41 of the first conductive rod 26 Is done.
[0043]
In the present embodiment, the slide contact 41 is covered by the third cover member 53 and the fourth cover member 54 that are arranged to face each other. However, the present invention is not limited to this, and only the third cover member 53 is provided. May be. In this case, the dimension of the third cover member 53 in the axial length direction is appropriately increased.
[0044]
Embodiment 4
FIG. 4 is a schematic side sectional view showing the fourth embodiment, and shows a case where a bellows is used. In the figure, parts corresponding to those shown in FIG. As shown in FIG. 4, a slide contact 41 is slidably fitted to the first conductive rod 26, and the first conductive rod 26 is positioned at a predetermined distance from the upper end of the slide contact 41 and the slide. At the lower end of the contact 41, annular plates 45 and 46 having a hole in the center of a disc having a diameter larger than the diameter of the slide contact 41 are externally fitted. A cylindrical fourth bellows 62 is provided between the upper edge of the slide contact 41 and the annular plate 45 opposed thereto, and between the annular plate 46 provided at the lower end of the slide contact 41 and the operating rod 28. Is provided with a cylindrical fifth bellows 63.
[0045]
In such a switch gear, when the first conductive rod 26 is advanced and retracted, the first conductive rod 26 slides while maintaining an electrical conduction state with the slide contact 41 fitted on the first conductive rod 26. Slide in the contact 41. At this time, the fifth bellows 63 expands and contracts as the first conductive rod 26 advances and retreats. Thus, the arc products resulting from the opening and closing operation of the main circuit switch section 25, that splashing of adhesion conductor abrasion powder due to wear of the adhesion to the portion in contact with the sliding contact 41 of the first conductive rod 26 proof Stopped.
[0046]
【The invention's effect】
As described above in detail, in the switchgear according to the first to third inventions, scattering of adhesion conductor wear powder due to adhesion wear at the contact portion between the flexible conductor and the contact and the rod is prevented. Therefore, safety and reliability are high.
[0047]
Further, in the switchgear according to the first and fourth inventions, the scattering of the adhered conductor wear powder due to the abrasion of the adhesion is prevented on the entire circumference of the flexible conductor and the contact portion.
[0048]
Further, in the switchgear according to the second and fifth inventions, the contact portion between the flexible conductor and the contact and the rod is entirely covered with the bellows, so that the adhesion conductor wear powder due to the wear of the adhesion is present. The present invention has excellent effects such as prevention of scattering.
[Brief description of the drawings]
FIG. 1 is a schematic side cross-sectional view showing a configuration of a main part of a switchgear according to the present invention.
FIG. 2 is a schematic sectional side view showing a second embodiment.
FIG. 3 is a schematic side cross-sectional view showing a third embodiment.
FIG. 4 is a schematic side sectional view showing a fourth embodiment.
FIG. 5 is a side cross-sectional view showing a main configuration of a conventional switchgear.
6 is an electrical connection diagram of the switchgear shown in FIG. 5. FIG.
FIG. 7 is a schematic cross-sectional side view showing a main part configuration of another conventional switchgear.
FIG. 8 is a schematic cross-sectional side view showing a main part configuration of another conventional switchgear.
[Explanation of symbols]
20 Vacuum vessel, 21 Bus side conductor, 22 Bus bar bushing, 34 Cable bushing, 25 Main circuit opening / closing part, 33 Load side conductor, 39 Grounding opening / closing part, 40 Flexible conductor,
41 slide contact, 51 first cover member, 52 second cover member, 53 third cover member, 54 fourth cover member, 61 third bellows, 62 fourth bellows,
63 5th bellows.

Claims (5)

真空容器内に装入してあり、外部の母線に接続する母線側導体及び外部の送電線に接続する負荷側導体と、
前記母線側導体に設けた第1電極と、
第2電極を支持し、該第2電極及び前記第1電極を接離する導電性のロッドと、
該ロッド及び前記負荷側導体の間に架設した可撓導体とを備え、
該可撓導体の周囲にそれを被覆するカバー部材が設けてあり、
該カバー部材は有底筒状になしてあることを特徴とするスイッチギヤ。
A bus-side conductor connected to an external bus and a load-side conductor connected to an external power transmission line, which is charged in the vacuum vessel;
A first electrode provided on the busbar side conductor;
A conductive rod that supports the second electrode and contacts and separates the second electrode and the first electrode;
A flexible conductor laid between the rod and the load side conductor;
Ri Ah provided with a cover member for covering it around the movable Deflection conductors,
A switchgear characterized in that the cover member has a bottomed cylindrical shape .
真空容器内に装入してあり、外部の母線に接続する母線側導体及び外部の送電線に接続する負荷側導体と、A bus-side conductor connected to an external bus and a load-side conductor connected to an external power transmission line, which is charged in the vacuum vessel;
前記母線側導体に設けた第1電極と、A first electrode provided on the busbar side conductor;
第2電極を支持し、該第2電極及び前記第1電極を接離する導電性のロッドと、A conductive rod that supports the second electrode and contacts and separates the second electrode and the first electrode;
該ロッド及び前記負荷側導体の間に架設した可撓導体とを備え、A flexible conductor laid between the rod and the load side conductor;
該可撓導体の周囲にそれを被覆するカバー部材が設けてあり、A cover member is provided around the flexible conductor to cover it.
該カバー部材はベローズを具備した筒状をなし、開口は前記ロッド及び負荷側導体との当着面により閉塞されていることを特徴とするスイッチギヤ。The switch gear is characterized in that the cover member has a cylindrical shape with a bellows, and the opening is closed by a contact surface between the rod and the load side conductor.
真空容器内に装入してあり、外部の母線に接続する母線側導体及び外部の送電線に接続する負荷側導体と、
前記母線側導体に設けた第1電極と、
第2電極を支持し、該第2電極及び前記第1電極を接離する導電性のロッドと、
前記負荷側導体に連結してあり、前記ロッドに接触する導電性の接触子とを備え、
該接触子と前記ロッドとの接触部分を被覆するカバー部材が設けてあることを特徴とするスイッチギヤ。
A bus-side conductor connected to an external bus and a load-side conductor connected to an external power transmission line, which is charged in the vacuum vessel;
A first electrode provided on the busbar side conductor;
A conductive rod that supports the second electrode and contacts and separates the second electrode and the first electrode;
A conductive contact connected to the load side conductor and contacting the rod;
A switchgear characterized in that a cover member for covering a contact portion between the contact and the rod is provided.
前記カバー部材は有底筒状になしてある請求項3記載のスイッチギヤ。The switchgear according to claim 3, wherein the cover member has a bottomed cylindrical shape. 前記カバー部材はベローズを具備する請求項3記載のスイッチギヤ。The switch gear according to claim 3 , wherein the cover member includes a bellows.
JP08233598A 1998-03-26 1998-03-27 Switchgear Expired - Fee Related JP3868104B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP08233598A JP3868104B2 (en) 1998-03-27 1998-03-27 Switchgear
TW088111751A TW426866B (en) 1998-03-26 1999-07-12 Flexible conductor and switchgear made with thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP08233598A JP3868104B2 (en) 1998-03-27 1998-03-27 Switchgear

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Publication number Priority date Publication date Assignee Title
JP3577247B2 (en) * 1999-11-10 2004-10-13 三菱電機株式会社 Switchgear
CN104466777B (en) * 2014-12-05 2017-06-30 北京合锐赛尔电力科技股份有限公司 A kind of solid insulation ring main unit
CN110828228B (en) * 2019-10-29 2021-06-08 浙江泰控电气有限公司 Vacuum interrupter contact protection device

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