JP3753544B2 - Switchgear - Google Patents

Switchgear Download PDF

Info

Publication number
JP3753544B2
JP3753544B2 JP20556398A JP20556398A JP3753544B2 JP 3753544 B2 JP3753544 B2 JP 3753544B2 JP 20556398 A JP20556398 A JP 20556398A JP 20556398 A JP20556398 A JP 20556398A JP 3753544 B2 JP3753544 B2 JP 3753544B2
Authority
JP
Japan
Prior art keywords
conductor
side conductor
vacuum vessel
conductive
load
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.)
Expired - Fee Related
Application number
JP20556398A
Other languages
Japanese (ja)
Other versions
JP2000040448A (en
Inventor
聖一 宮本
孝行 糸谷
稔正 丸山
光政 寄田
健一 小山
俊則 木村
伸治 佐藤
洋一 久森
卓 関谷
武文 伊藤
巌 河又
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP20556398A priority Critical patent/JP3753544B2/en
Priority to TW088111751A priority patent/TW426866B/en
Publication of JP2000040448A publication Critical patent/JP2000040448A/en
Application granted granted Critical
Publication of JP3753544B2 publication Critical patent/JP3753544B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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

  • 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、電源に接続する母線側導体(電源側導体)と負荷側導体とを接離する主回路開閉部を備えるスイッチギアに関する。
【0002】
【従来の技術】
スイッチギアは、内部を高真空にして絶縁性を高めた容器内に、電源と接続する母線側導体及び負荷側導体の各端部を夫々引き込み、外部の駆動装置によって母線側導体と負荷側導体とを接離させることにより、電源側から負荷側へ流れる電流を遮断する構成にしてある。
【0003】
図4は従来のスイッチギアの要部の構成を示す模式的断面図であり、図において20は、内部を高真空にした真空容器である。真空容器20内にはその上部から母線用ブッシング22を通して電源側(母線側)導体21の一端部が、また側部からケーブルブッシング34を通して負荷側導体33の一端部が夫々導入されている。電源側導体21の下端部には第1固定電極23が設けられ、その下方に適宜の間隔を隔てて導電性ロッド26の上端部に設けた第1可動電極24と対向させ、これらによって主回路開閉部25が構成されている。
【0004】
導電性ロッド26は、電源側導体21と同一直線上に設置されており、その下端部は絶縁ロッド29に連結され、また絶縁ロッド29は操作ロッド28を介して真空容器20の外部に設けてある図示しない駆動装置に連結されており、駆動装置によって電源側導体21の第1固定電極23と導電性ロッド26の第1可動電極24とを接離せしめるようになしてある。操作ロッド28とこれを貫通させてある真空容器20の孔の周縁部との間には第1ベローズ31を介装することによって、真空容器20の気密性を保つようにしてある。
【0005】
一方、導電性ロッド26の中間部分には、金属環27をその周面が負荷側導体33の一端部と対向するように外嵌固定してある。金属環27の周面と負荷側導体33の一端部との間は、金属箔を重ねて構成した可撓導体40の各端部をろう付けすることによって接続してある。また真空容器20の下方から、負荷側導体33と対向する位置に接地用導体36の上端部を突出させてあり、図示しない駆動装置によって負荷側導体33と接離せしめられるようにしてある。
接地用導体36の上端部には第2可動電極38が、またこれと対向する負荷側導体33の周面には第2固定電極37が設けられており、これらによって接地開閉部39が構成されている。
接地用導体36とこれを貫通させてある真空容器20の孔の周縁部との間には第2ベローズ32を介装することによって、真空容器20の気密性を保つようにしてある。
【0006】
【発明が解決しようとする課題】
前述した如きスイッチギアにおいては、脱ガスベーキングを行なう前処理を施した後、金属環27と負荷側導体33の一端部とに渡して可撓導体40の各端部を夫々ろう付けして固定するが、このとき加熱・放熱による焼きなまし作用により、可撓導体40の不純物が拡散し、金属成分が均質化する清浄化作用を受ける。ところが清浄化される過程で、また金属箔が互いに摺り合わされる過程で酸化膜が失われ、可撓導体40に電流が流れて発熱した際に可撓導体40を構成する金属箔の表面同士が凝着する。
【0007】
可撓導体40の金属箔に凝着が生じた場合、本来の可撓性が失われるばかりでなく、導電性ロッド26の進退移動に伴って可撓導体40が撓む都度、凝着が生じた部分に多方向から力が加わることによって金属箔に剪断歪みが生じるが、剪断歪みの生じた部分が破断すると、導電性の凝着摩耗粉が周囲に飛散し、絶縁性を保っていた真空容器20内が汚染されて耐電圧性能が低下するという問題があった。
【0008】
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、可撓導体を覆うカバー部材の内部を気密状態にし、その中に大気又は窒素ガスを封入することによって、可撓導体の凝着を防止し、破断時の凝着摩耗粉による真空容器内の汚染を防止して耐電圧性能を安定化したスイッチギアを提供することにある。
【0009】
また他の目的は、可撓導体を真空容器外に設けて凝着自体の発生を防止し、導電性の凝着摩耗粉による真空容器内の汚染を防止して耐電圧性能を安定にしたスイッチギアを提供することにある。
【0010】
更に他の目的は、導電性ロッドと負荷側導体とに渡して筒状の導電性部材を設けることによって、凝着の発生がなく、導電性の凝着摩耗粉による真空容器内の汚染を防止して耐電圧性能を安定にしたスイッチギアを提供することにある。
【0011】
また更に他の目的は、カバー部材をベローズで、また導電性部材を筒形をなす導電性ベローズで構成することによって、電源側導体と導電性ロッドとの接離動作に対し、導電性ロッドと負荷側導体とを結ぶ導電性部材を円滑に追従することができるスイッチギアを提供することにある。
【0012】
【課題を解決するための手段】
請求項1に記載の発明に係るスイッチギアは、真空容器内に、電源側導体と、該電源側導体と接離する導電性ロッドと、負荷側導体と、導電性の金属箔を積層して形成され、前記負荷側導体及び導電性ロッドに接続してある可撓導体と、該可撓導体を覆って、前記導電性ロッド及び負荷側導体のそれぞれに気密状態に固定した可撓性を有するカバー部材とを設けてあり、該カバー部材内には、酸素又は窒素を含む気体が封入してあることを特徴とする。
【0013】
この発明においては、カバー部材を電源側導体と接離する導電性ロッドと負荷側導体とに渡して気密状態にしたカバー部材を固定し、カバー部材の内部に酸素または窒素を含む気体を封入することによって、可撓導体の表面に酸化物または窒化物の膜を形成することができ、可撓導体への凝着を抑制することができる。また、可撓導体の可撓性が損なわれないことから導電性ロッドの動きにも円滑に追従することができ、またたとえ凝着摩耗粉が生じた場合でも、可撓導体はカバー部材に覆われているので真空容器内を汚染することがなく、耐電圧性能の信頼性を高め得る。
【0014】
請求項2に記載の発明に係るスイッチギアは、開口部が設けてある真空容器内に、電源側導体と、該電源側導体と接離する導電性ロッドと、該導電性ロッドに接続してある接続導体とを設けてあり、前記真空容器の内外を気密に封止すべく、前記開口部及び接続導体に渡して固定してある可撓性を有するカバー部材を備え、該カバー部材を通して前記真空容器の外部に位置する前記接続導体の一端部と、前記真空容器外にある負荷側導体とを導電性の金属箔を積層して形成した可撓導体にて接続したことを特徴とする。
【0015】
この発明においては、真空容器に設けられた開口部と真空容器内部の接続導体とに渡して可撓性を備えるカバー部材を固定し、このカバー部材を通して真空容器の外側に位置する接続導体の一端部を真空容器外の負荷側導体に可撓導体によって接続させることで可撓導体自体を真空容器外におくことができ、可撓導体に凝着が生じることを防止して、耐電圧性能の安定化を図ることができる。
【0016】
請求項3に記載の発明に係るスイッチギアは、真空容器内に、電源側導体と、該電源側導体と接離する導電性ロッドと、負荷側導体と、該負荷側導体と前記導電性ロッドとに渡して固定され、伸縮性を備えた筒形をなす導電性部材とを設けてあることを特徴とする。
【0017】
この発明においては、導電性ロッドと負荷側導体に渡して可撓性,伸縮性を備えた筒形をなす導電性部材を設けることで、凝着自体及び凝着摩耗粉の発生が防止できて真空容器内が汚染されることがなく、耐電圧性能が安定する。
【0018】
請求項4に記載の発明に係るスイッチギアは、カバー部材は、ベローズであることを特徴とする。
【0019】
請求項5に記載の発明に係るスイッチギアは、導電性部材は、導電性材料で形成されたベローズであることを特徴とする。
【0020】
これらの発明においては、ベローズを用いることによって、電源側導体と接離する導電性ロッドの動きに、内部の気密性を保持しつつ、円滑に追従することができる。
【0021】
【発明の実施の形態】
以下本発明をその実施の形態1を示す図面に基づいて具体的に説明する。
実施の形態1
図1は実施の形態に係るスイッチギアの要部構成を示す模式的側断面図である。図において、20は内部を10-3torr以下の高真空に保っている真空容器である。真空容器20の上部壁には母線用ブッシング22を、また側部壁にケーブルブッシング34を夫々気密状態を保つ状態で嵌着させてあり、またこれらを通して電源側(母線側)導体21、負荷側導体33の各一端部が真空容器20内に気密状態を保った状態で導入してある。
【0022】
真空容器20内に導入された電源側導体21の端部には、第1固定電極23が設けてあり、これと適宜の間隔を隔てて同一直線上に配した導電性ロッド26の端部に設けてある第1可動電極24と対向させ、主回路開閉部25が構成されている。
導電性ロッド26は、絶縁ロッド29を介して操作ロッド28に連結し、また操作ロッド28は、真空容器20の外部に配した図示しない駆動装置によって進退駆動され、第1可動電極24を第1固定電極23と接離せしめるようにしてある。
なお、操作ロッド28とこれを貫通させてある真空容器20の孔の周縁部との間には第1ベローズ31を介装させることによって真空容器20の気密性を保っている。
【0023】
一方、導電性ロッド26の中間部分には金属環27を、その図面が負荷側導体33の一端部と対向するように外嵌固定してある。金属環27と負荷側導体33の一端部とに渡して金属箔を重ねて構成してある可撓導体40の各端部をろう付けして接続してある。そしてこの可撓導体40の周囲を覆うために、金属環27の周面と負荷側導体33の一端部との間にはステンレス系または銅系等の金属で作成したベローズ41aがその各一端部をろう付けすることにより、場合によっては溶接することによって内部が気密状態になるように固定してある。
【0024】
真空容器20の下方には、前記負荷側導体33と対向する位置に真空容器20を貫通させて接地用導体36の上端部を臨ませてあり、接地用導体36の上端部には第2可動電極38を設け、負荷側導体33の周面に設けた第2固定電極37と対向させてあり、これらによって、接地開閉部39を形成してある。
接地用導体36の下端部は図示しない駆動装置に連結されており、この駆動装置によって進退移動し、第2可動電極38を第2固定電極37に接離させるようにしてある。
接地用導体36とこれを貫通させた真空容器20の孔の周縁部との間に第2ベローズ32を介装することにより、真空容器20の気密性が保持されている。
【0025】
このような実施の形態1のスイッチギアにあっては、主回路開閉部25の開閉動作によってはアーク生成物が生じることがあるが、可撓導体40の周囲をベローズ41aで覆うことによって可撓導体40にアーク生成物が付着することを防止している。
【0026】
ところでベローズ41aは、内部に導電性ロッド26の進退に伴う可撓導体40の形状の変化にも対応できる空間を確保し、可撓導体40と接触しない形状にしてあり、しかも導電性ロッド26の進退に伴った動きにも円滑に追従可能な可撓性及び伸縮性を備えている。そして、内部には10torrから760torrまでの圧力の大気又は窒素ガスを封入してあり、可撓導体40の表面には酸化物または窒化物の膜が形成され、可撓導体40表面の凝着を抑制することができ、可撓導体40の可撓性、伸縮性が損なわれることがなく、導電性の凝着摩耗粉によって真空容器20内を汚染することもなく、耐電圧性能が安定する。
【0027】
なお、可撓導体40及びベローズ41aの位置は接地開閉部39のある位置よりも負荷側導体33側に設けてもよい。
【0028】
実施の形態2
図2は実施の形態2に係るスイッチギアの要部構成を示す模式的側断面図であり、この実施の形態2にあっては、導電性ロッド26に外嵌固定してある金属環27の周面に対向して、真空容器20の側部壁に開口部が設けてある。
金属環27には側方に延在する接続導体42が設けてあり、また開口部の径は可撓導体40がかなり余裕をもって貫通できる大きさにしてあり、可撓導体の一端部は真空容器20内において接続導体42の一端部に、また開口部を貫通している可撓導体40の他端部は、真空容器20外にある負荷側導体33にろう付けし、電源側から負荷側へ電流が流れるようにしてある。また、真空容器20の下部には、接続導体42と対向する位置には接地用導体36の上端部を貫通させてあり、その下端部は図示しない駆動装置に連結されている。
【0029】
接続導体42の一端部と真空容器20の開口部との間には、ステンレス系の金属で作成されたベローズ41bが設けてあり、ベローズ41bの両端をそれぞれ接続導体42の一端部と真空容器20の開口部周縁にろう付けして固定してあるので、真空容器20内の気密性が保持されている。
【0030】
こうして可撓導体40を真空容器20の外部に置くことによって、可撓導体40への凝着を抑制して可撓性の喪失を防止している。また導電性の凝着摩耗粉が真空容器20内に拡散して真空容器20内を汚染することもなく、耐電圧性能を安定にすることができる。
図1と重複する内容については、同じ番号を付けることにより説明を省略する。
【0031】
実施の形態3
図3は実施の形態3に係るスイッチギアの要部構成を示す模式的側断面図である。
導電性ロッド26に外嵌固定している金属環27の外周面と負荷側導体33の一端部とに銅系の金属で作成された導電性ベローズ43が渡され、その両端部が夫々ろう付けして接続してある。導電性ベローズ43は、主回路開閉部25の開閉動作に伴う金属環27と負荷側導体33との位置ずれにも円滑に追従し得る可撓性,伸縮性を備えている。
このような構成とすることで、部材同士が互いに接触しないために、導電性ベローズ43の外周面及び内周面において凝着が生じず、凝着摩耗粉が発生しないので耐電圧性能を安定にすることができる。
【0032】
なお、導電性ベローズ43の位置は接地開閉部39のある位置よりも負荷側導体33側にあってもよい。
さらに、実施の形態1,2におけるベローズ41a、41b及び実施の形態3における導電性ベローズ43の径方向の断面形状は、円形に限らず楕円、四角形等であってもよい。
図1と重複する内容については同じ部分に同じ番号を付して説明を省略する。
【0033】
【発明の効果】
請求項1に記載の発明のスイッチギアにおいては、カバー部材で可撓導体を覆ってあるために、アーク生成物の付着を阻止することができる。また、その内部に大気または窒素を含むガスを封入してあり、可撓導体の表面に酸化物または窒化物の膜を形成することができるために、可撓導体の凝着を防止することができる。これにより可撓導体において可撓性,伸縮性を良好に保つことが可能となり、凝着摩耗粉の発生を防止でき、真空容器内が汚染することがなく耐電圧性能を安定に維持できる。
【0034】
請求項2に記載の発明のスイッチギアにおいては、可撓導体が真空容器の外にあるために、可撓導体に凝着が生じることを防止でき、動作を安定にすることができる。また凝着摩耗粉が発生することも防止できるので真空容器内が汚染されることがなくなり耐電圧性能を安定にすることができる。
【0035】
請求項3に記載の発明のスイッチギアにおいては、可撓性のある導電性部材を用いることにより主回路の開閉を行なう導電性ロッドの動作にも円滑に追従することができる。さらに部材同士が互いに接触しないように形成してあるために、凝着が生じず、凝着摩耗粉によって真空容器内が汚染される虞れもなくなることから耐電圧性能を安定にすることができる。
【0036】
請求項4、請求項5に記載の発明のスイッチギアにおいて、ベローズを用いることによって、内部の気密性を保持し、母線側及び負荷側の電極の接離を行なう導電性ロッドの動作にも円滑に追従することができる。
【図面の簡単な説明】
【図1】 実施の形態1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の要部構成を示す模式的側断面図である。
【図3】 実施の形態3の要部構成を示す模式的側断面図である。
【図4】 従来のスイッチギア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 電源側(母線側)導体、22 母線用ブッシング、
23 第1固定電極、24 第1可動電極、25 主回路開閉部、26 導電性ロッド、27 金属環、28 操作ロッド、29 絶縁ロッド、31 第1ベローズ、32 第2ベローズ、33 負荷側導体、34 ケーブルブッシング、
36 接地用導体、37 第2固定電極、38 第2可動電極、39 接地開閉部、40 可撓導体、41a,41b ベローズ。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switchgear including a main circuit opening / closing portion that connects and disconnects a bus-side conductor (power-source-side conductor) connected to a power source and a load-side conductor.
[0002]
[Prior art]
The switchgear draws each end of the bus-side conductor and load-side conductor connected to the power source into a container whose interior is highly evacuated to improve insulation, and the bus-side conductor and load-side conductor are connected by an external drive unit. Is configured to cut off the current flowing from the power source side to the load side.
[0003]
FIG. 4 is a schematic cross-sectional view showing a configuration of a main part of a conventional switchgear. In the figure, reference numeral 20 denotes a vacuum container having an internal high vacuum. One end portion of the power source side (bus side) conductor 21 is introduced into the vacuum vessel 20 from above through the bus bushing 22, and one end portion of the load side conductor 33 is introduced from the side portion through the cable bushing 34. A first fixed electrode 23 is provided at the lower end portion of the power supply side conductor 21, and is opposed to the first movable electrode 24 provided at the upper end portion of the conductive rod 26 at an appropriate interval below the first fixed electrode 23. An opening / closing part 25 is configured.
[0004]
The conductive rod 26 is installed on the same straight line as the power supply side conductor 21, the lower end portion thereof is connected to the insulating rod 29, and the insulating rod 29 is provided outside the vacuum vessel 20 via the operation rod 28. The drive unit is connected to a drive device (not shown), and the drive device allows the first fixed electrode 23 of the power supply side conductor 21 and the first movable electrode 24 of the conductive rod 26 to be brought into contact with and separated from each other. A first bellows 31 is interposed between the operation rod 28 and the peripheral edge of the hole of the vacuum vessel 20 through which the operation rod 28 passes, so that the airtightness of the vacuum vessel 20 is maintained.
[0005]
On the other hand, a metal ring 27 is externally fitted and fixed to an intermediate portion of the conductive rod 26 so that the circumferential surface thereof faces one end of the load-side conductor 33. The peripheral surface of the metal ring 27 and one end portion of the load side conductor 33 are connected by brazing each end portion of the flexible conductor 40 formed by overlapping metal foils. Further, the upper end portion of the grounding conductor 36 is protruded from the lower side of the vacuum vessel 20 at a position facing the load side conductor 33 so as to be brought into contact with and separated from the load side conductor 33 by a driving device (not shown).
A second movable electrode 38 is provided at the upper end of the grounding conductor 36, and a second fixed electrode 37 is provided on the peripheral surface of the load-side conductor 33 that faces the second movable electrode 38. ing.
A second bellows 32 is interposed between the grounding conductor 36 and the peripheral portion of the hole of the vacuum vessel 20 that passes through the grounding conductor 36 so that the vacuum tightness of the vacuum vessel 20 is maintained.
[0006]
[Problems to be solved by the invention]
In the switchgear as described above, after pretreatment for degassing baking is performed, each end of the flexible conductor 40 is brazed and fixed to the metal ring 27 and one end of the load-side conductor 33. However, at this time, due to the annealing action by heating and heat dissipation, the impurities of the flexible conductor 40 are diffused, and the metal element is cleaned. However, the oxide film is lost in the process of being cleaned and the metal foils are rubbed together, and the surfaces of the metal foils constituting the flexible conductor 40 are generated when current flows through the flexible conductor 40 and generates heat. Adhere.
[0007]
When adhesion occurs on the metal foil of the flexible conductor 40, not only is the original flexibility lost, but adhesion occurs whenever the flexible conductor 40 bends as the conductive rod 26 moves back and forth. The metal foil is subject to shear strain due to the force applied from multiple directions to the part, but when the part where the shear strain occurs breaks, the conductive adhesive wear powder scatters to the surroundings and keeps the insulation. There was a problem that the withstand voltage performance deteriorated due to contamination of the inside of the container 20.
[0008]
The present invention has been made in view of such circumstances, and an object of the present invention is to make the inside of the cover member covering the flexible conductor airtight and enclose air or nitrogen gas therein, thereby allowing the flexible An object of the present invention is to provide a switchgear that stabilizes withstand voltage performance by preventing adhesion of conductors and preventing contamination in the vacuum vessel due to adhesion wear powder at the time of breakage.
[0009]
Another purpose is to provide a flexible conductor outside the vacuum vessel to prevent the occurrence of adhesion itself, and to prevent contamination inside the vacuum vessel due to conductive adhesive wear powder, and to stabilize the withstand voltage performance. To provide gear.
[0010]
Another object is to provide a cylindrical conductive member across the conductive rod and the load-side conductor, preventing the occurrence of adhesion and preventing contamination in the vacuum vessel due to conductive adhesion wear powder. The object is to provide a switchgear having a stable withstand voltage performance.
[0011]
Still another object is that the cover member is made of a bellows and the conductive member is made of a conductive bellows having a cylindrical shape, so that the contact between the power source side conductor and the conductive rod can be reduced. An object of the present invention is to provide a switchgear that can smoothly follow a conductive member that connects a load-side conductor.
[0012]
[Means for Solving the Problems]
The switchgear according to the invention described in claim 1 includes a power supply side conductor, a conductive rod contacting and separating from the power supply side conductor, a load side conductor, and a conductive metal foil in a vacuum vessel. A flexible conductor formed and connected to the load-side conductor and the conductive rod; and having flexibility that covers the flexible conductor and is fixed in an airtight state to each of the conductive rod and the load-side conductor. A cover member is provided, and a gas containing oxygen or nitrogen is sealed in the cover member.
[0013]
In the present invention, the cover member made airtight is fixed by passing the cover member between the conductive rod contacting and separating from the power supply side conductor and the load side conductor, and a gas containing oxygen or nitrogen is sealed inside the cover member. Thus, an oxide or nitride film can be formed on the surface of the flexible conductor, and adhesion to the flexible conductor can be suppressed. In addition, since the flexibility of the flexible conductor is not impaired, the movement of the conductive rod can be smoothly followed, and even if adhesive wear powder is generated, the flexible conductor covers the cover member. Therefore, the inside of the vacuum vessel is not contaminated and the reliability of the withstand voltage performance can be improved.
[0014]
The switchgear according to the invention of claim 2 is connected to the power supply side conductor, the conductive rod contacting and separating from the power supply side conductor, and the conductive rod in the vacuum vessel provided with the opening. is provided with a certain connection conductor, comprising a cover member having flexibility which the vacuum vessel sealing inside and outside the hermetic Subeku, it is fixed by passing the opening及beauty connecting conductors, the cover member The one end of the connection conductor located outside the vacuum vessel and the load side conductor outside the vacuum vessel are connected by a flexible conductor formed by laminating a conductive metal foil. To do.
[0015]
In this invention, the cover member having flexibility is fixed across the opening provided in the vacuum vessel and the connection conductor inside the vacuum vessel, and one end of the connection conductor located outside the vacuum vessel through this cover member The flexible conductor itself can be placed outside the vacuum vessel by connecting the portion to the load-side conductor outside the vacuum vessel with a flexible conductor, preventing adhesion of the flexible conductor, and withstanding voltage performance. Stabilization can be achieved.
[0016]
According to a third aspect of the present invention, the switchgear includes a power supply side conductor, a conductive rod contacting and separating from the power supply side conductor, a load side conductor, the load side conductor, and the conductive rod in a vacuum vessel. And a conductive member having a cylindrical shape that is fixed and provided with elasticity.
[0017]
In this invention, by providing a conductive member having a cylindrical shape with flexibility and stretchability across the conductive rod and the load-side conductor, adhesion itself and generation of adhesion wear powder can be prevented. The inside of the vacuum vessel is not contaminated, and the withstand voltage performance is stabilized.
[0018]
In the switchgear according to the invention described in claim 4, the cover member is a bellows.
[0019]
In the switchgear according to the invention described in claim 5, the conductive member is a bellows formed of a conductive material.
[0020]
In these inventions, by using the bellows, it is possible to smoothly follow the movement of the conductive rod contacting and separating from the power supply side conductor while maintaining the internal airtightness.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described with reference to the drawings showing the first embodiment.
Embodiment 1
FIG. 1 is a schematic cross-sectional side view showing a main configuration of a switchgear according to an embodiment. In the figure, reference numeral 20 denotes a vacuum container whose interior is maintained at a high vacuum of 10 −3 torr or less. A bus bushing 22 is fitted to the upper wall of the vacuum vessel 20 and a cable bushing 34 is fitted to the side wall in an airtight state, and the power source side (bus side) conductor 21 and the load side are passed through them. Each end portion of the conductor 33 is introduced into the vacuum container 20 in an airtight state.
[0022]
A first fixed electrode 23 is provided at the end portion of the power supply side conductor 21 introduced into the vacuum vessel 20, and the end portion of the conductive rod 26 arranged on the same straight line with an appropriate interval therebetween. A main circuit opening / closing part 25 is configured to face the first movable electrode 24 provided.
The conductive rod 26 is connected to the operation rod 28 via an insulating rod 29, and the operation rod 28 is driven forward and backward by a drive device (not shown) arranged outside the vacuum vessel 20, and the first movable electrode 24 is moved to the first. It is made to contact / separate with the fixed electrode 23. FIG.
In addition, the airtightness of the vacuum vessel 20 is maintained by interposing the first bellows 31 between the operation rod 28 and the peripheral portion of the hole of the vacuum vessel 20 through which the operation rod 28 passes.
[0023]
On the other hand, a metal ring 27 is fitted and fixed to an intermediate portion of the conductive rod 26 so that the drawing faces one end of the load side conductor 33. Each end portion of the flexible conductor 40 formed by overlapping the metal foil across the metal ring 27 and one end portion of the load side conductor 33 is brazed and connected. And in order to cover the circumference | surroundings of this flexible conductor 40, between the peripheral surface of the metal ring 27 and the one end part of the load side conductor 33, the bellows 41a produced with metals, such as stainless steel or copper type | mold, is each one end part By brazing, in some cases, the inside is fixed by air welding so as to be in an airtight state.
[0024]
Below the vacuum vessel 20, the vacuum vessel 20 passes through the position facing the load-side conductor 33 so that the upper end of the grounding conductor 36 is exposed, and the upper end of the grounding conductor 36 is second movable. An electrode 38 is provided and is opposed to a second fixed electrode 37 provided on the peripheral surface of the load-side conductor 33, thereby forming a ground opening / closing part 39.
The lower end portion of the grounding conductor 36 is connected to a drive device (not shown), and is moved forward and backward by this drive device so that the second movable electrode 38 contacts and separates from the second fixed electrode 37.
The second bellows 32 is interposed between the grounding conductor 36 and the peripheral portion of the hole of the vacuum vessel 20 that passes through the grounding conductor 36, whereby the airtightness of the vacuum vessel 20 is maintained.
[0025]
In such a switchgear according to the first embodiment, an arc product may be generated depending on the opening / closing operation of the main circuit opening / closing portion 25, but the flexible conductor 40 is flexible by covering the periphery of the flexible conductor 40 with the bellows 41a. The arc product is prevented from adhering to the conductor 40.
[0026]
By the way, the bellows 41a secures a space that can cope with a change in the shape of the flexible conductor 40 accompanying the advancement and retraction of the conductive rod 26, and has a shape that does not contact the flexible conductor 40. It is flexible and stretchable so that it can smoothly follow the movements associated with advance and retreat. Then, air or nitrogen gas at a pressure of 10 to 760 torr is sealed inside, and an oxide or nitride film is formed on the surface of the flexible conductor 40 to adhere the surface of the flexible conductor 40. The withstand voltage performance is stabilized without sacrificing the flexibility and stretchability of the flexible conductor 40 and without contaminating the inside of the vacuum vessel 20 with the conductive adhesive wear powder.
[0027]
The positions of the flexible conductor 40 and the bellows 41a may be provided closer to the load side conductor 33 than the position where the ground opening / closing portion 39 is located.
[0028]
Embodiment 2
FIG. 2 is a schematic side cross-sectional view showing the configuration of the main part of the switchgear according to the second embodiment. In the second embodiment, the metal ring 27 externally fixed to the conductive rod 26 is shown. Opposite to the peripheral surface, an opening is provided in the side wall of the vacuum vessel 20.
The metal ring 27 is provided with a connecting conductor 42 extending laterally, and the diameter of the opening is sized so that the flexible conductor 40 can be penetrated with a considerable margin. 20, one end of the connection conductor 42 and the other end of the flexible conductor 40 penetrating the opening are brazed to the load-side conductor 33 outside the vacuum vessel 20, from the power supply side to the load side. A current flows. Further, an upper end portion of the grounding conductor 36 is passed through the lower portion of the vacuum vessel 20 at a position facing the connection conductor 42, and the lower end portion is connected to a driving device (not shown).
[0029]
A bellows 41b made of a stainless steel metal is provided between one end of the connection conductor 42 and the opening of the vacuum vessel 20, and both ends of the bellows 41b are connected to one end of the connection conductor 42 and the vacuum vessel 20 respectively. Therefore, the airtightness in the vacuum container 20 is maintained.
[0030]
By placing the flexible conductor 40 outside the vacuum vessel 20 in this way, adhesion to the flexible conductor 40 is suppressed and loss of flexibility is prevented. In addition, the conductive withstand wear powder does not diffuse into the vacuum vessel 20 and contaminate the inside of the vacuum vessel 20, and the withstand voltage performance can be stabilized.
About the content which overlaps in FIG. 1, description is abbreviate | omitted by attaching | subjecting the same number.
[0031]
Embodiment 3
FIG. 3 is a schematic cross-sectional side view showing a main part configuration of the switchgear according to the third embodiment.
A conductive bellows 43 made of a copper-based metal is passed between the outer peripheral surface of the metal ring 27 fitted and fixed to the conductive rod 26 and one end of the load-side conductor 33, and both ends thereof are brazed. Connected. The conductive bellows 43 has flexibility and stretchability that can smoothly follow a positional shift between the metal ring 27 and the load-side conductor 33 accompanying the opening / closing operation of the main circuit opening / closing portion 25.
By adopting such a configuration, since the members do not contact each other, adhesion does not occur on the outer peripheral surface and inner peripheral surface of the conductive bellows 43, and no adhesive wear powder is generated, so that the withstand voltage performance is stable. can do.
[0032]
The position of the conductive bellows 43 may be closer to the load side conductor 33 than the position where the ground opening / closing portion 39 is located.
Furthermore, the cross-sectional shape in the radial direction of the bellows 41a and 41b in the first and second embodiments and the conductive bellows 43 in the third embodiment is not limited to a circle but may be an ellipse or a quadrangle.
About the content which overlaps with FIG. 1, the same number is attached | subjected to the same part and description is abbreviate | omitted.
[0033]
【The invention's effect】
In the switchgear according to the first aspect of the present invention, since the flexible conductor is covered with the cover member, the adhesion of the arc product can be prevented. In addition, since the gas containing air or nitrogen is enclosed in the inside, and an oxide or nitride film can be formed on the surface of the flexible conductor, adhesion of the flexible conductor can be prevented. it can. This makes it possible to maintain good flexibility and stretchability in the flexible conductor, prevent generation of adhesive wear powder, and stably maintain the withstand voltage performance without contaminating the inside of the vacuum vessel.
[0034]
In the switchgear according to the second aspect of the present invention, since the flexible conductor is outside the vacuum vessel, it is possible to prevent adhesion of the flexible conductor and to stabilize the operation. Moreover, since the generation of adhesive wear powder can be prevented, the inside of the vacuum vessel is not contaminated, and the withstand voltage performance can be stabilized.
[0035]
In the switchgear of the invention described in claim 3, by using a flexible conductive member, it is possible to smoothly follow the operation of the conductive rod for opening and closing the main circuit. Furthermore, since the members are formed so as not to contact each other, adhesion does not occur, and there is no possibility that the inside of the vacuum vessel is contaminated by the adhesion wear powder, so that the withstand voltage performance can be stabilized. .
[0036]
In the switchgear of the invention according to claims 4 and 5, by using the bellows, the internal airtightness is maintained, and the operation of the conductive rod for connecting and separating the electrodes on the bus side and the load side is also smooth. Can follow.
[Brief description of the drawings]
FIG. 1 is a schematic side cross-sectional view showing a main configuration of a first embodiment.
FIG. 2 is a schematic side cross-sectional view showing a main configuration of a second embodiment.
FIG. 3 is a schematic side cross-sectional view showing a main part configuration of a third embodiment.
FIG. 4 is a schematic cross-sectional side view showing a main part configuration of a conventional switchgear.
[Explanation of symbols]
20 vacuum vessel, 21 power supply side (bus side) conductor, 22 bus bar bushing,
23 1st fixed electrode, 24 1st movable electrode, 25 Main circuit opening / closing part, 26 Conductive rod, 27 Metal ring, 28 Operation rod, 29 Insulating rod, 31 1st bellows, 32 2nd bellows, 33 Load side conductor, 34 Cable bushing,
36 grounding conductor, 37 second fixed electrode, 38 second movable electrode, 39 ground opening / closing part, 40 flexible conductor, 41a, 41b bellows.

Claims (5)

真空容器内に、電源側導体と、該電源側導体と接離する導電性ロッドと、負荷側導体と、導電性の金属箔を積層して形成され、前記負荷側導体及び導電性ロッドに接続してある可撓導体と、該可撓導体を覆って、前記導電性ロッド及び負荷側導体のそれぞれに気密状態に固定した可撓性を有するカバー部材とを設けてあり、該カバー部材内には、酸素又は窒素を含む気体が封入してあることを特徴とするスイッチギア。A vacuum vessel is formed by laminating a power supply side conductor, a conductive rod contacting and separating from the power supply side conductor, a load side conductor, and a conductive metal foil, and connected to the load side conductor and the conductive rod. And a flexible cover member that covers the flexible conductor and is fixed to each of the conductive rod and the load side conductor in an airtight state. Is a switchgear in which a gas containing oxygen or nitrogen is enclosed. 開口部が設けてある真空容器内に、電源側導体と、該電源側導体と接離する導電性ロッドと、該導電性ロッドに接続してある接続導体とを設けてあり、前記真空容器の内外を気密に封止すべく、前記開口部及び接続導体に渡して固定してある可撓性を有するカバー部材を備え、該カバー部材を通して前記真空容器の外部に位置する前記接続導体の一端部と、前記真空容器外にある負荷側導体とを導電性の金属箔を積層して形成した可撓導体にて接続したことを特徴とするスイッチギア。In the vacuum vessel provided with the opening, a power supply side conductor, a conductive rod contacting and separating from the power supply side conductor, and a connection conductor connected to the conductive rod are provided , sealing Subeku internal and external airtight, before a cover member having flexibility which is fixed by passing the KiHiraki opening及beauty connection conductor, the connection located outside of the vacuum vessel through the cover member A switchgear characterized in that one end of a conductor and a load-side conductor outside the vacuum vessel are connected by a flexible conductor formed by laminating conductive metal foil. 真空容器内に、電源側導体と、該電源側導体と接離する導電性ロッドと、負荷側導体と、該負荷側導体と前記導電性ロッドとに渡して固定され、伸縮性を備えた筒形をなす導電性部材とを設けてあることを特徴とするスイッチギア。In the vacuum vessel, a power supply-side conductor, a conductive rod contacting and separating from the power-supply-side conductor, a load-side conductor, and a tube having elasticity that is fixed across the load-side conductor and the conductive rod A switchgear comprising a conductive member having a shape. カバー部材は、ベローズであることを特徴とする請求項1又は2記載のスイッチギア。The switchgear according to claim 1 or 2, wherein the cover member is a bellows. 導電性部材は、導電性材料で形成されたベローズであることを特徴とする請求項3記載のスイッチギア。4. The switchgear according to claim 3, wherein the conductive member is a bellows formed of a conductive material.
JP20556398A 1998-03-26 1998-07-21 Switchgear Expired - Fee Related JP3753544B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP20556398A JP3753544B2 (en) 1998-07-21 1998-07-21 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
JP20556398A JP3753544B2 (en) 1998-07-21 1998-07-21 Switchgear

Publications (2)

Publication Number Publication Date
JP2000040448A JP2000040448A (en) 2000-02-08
JP3753544B2 true JP3753544B2 (en) 2006-03-08

Family

ID=16508976

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20556398A Expired - Fee Related JP3753544B2 (en) 1998-03-26 1998-07-21 Switchgear

Country Status (1)

Country Link
JP (1) JP3753544B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3755639B2 (en) * 2000-02-17 2006-03-15 三菱電機株式会社 Switchgear
JP4218018B2 (en) * 2003-04-03 2009-02-04 株式会社日立製作所 Vacuum switchgear

Also Published As

Publication number Publication date
JP2000040448A (en) 2000-02-08

Similar Documents

Publication Publication Date Title
US8227720B2 (en) Vacuum switch and vacuum switchgear
JP4522490B1 (en) Gas insulated switchgear
JP3753544B2 (en) Switchgear
JPH07123016B2 (en) Vacuum bottle for circuit breaker
JP4818530B2 (en) Vacuum valve
JP2005259543A (en) Switch gear and manufacturing method of switch gear
JP5350317B2 (en) Vacuum switch, electrode for switch or manufacturing method of vacuum switch
JP2004362918A (en) Vacuum valve
JP7412876B2 (en) vacuum switchgear
KR100335318B1 (en) Flexible conductor and switchgear made with thereof
JP4470228B2 (en) Vacuum switch
JP2005197128A (en) Complex insulation switchgear
JP3166523B2 (en) Vacuum valve, method of manufacturing the same, and vacuum circuit breaker
TWI707103B (en) Vacuum valve
US4628147A (en) Semiconductor housings
JP4394963B2 (en) Switchgear
JP3868104B2 (en) Switchgear
JP4004681B2 (en) Switchgear
JP4640148B2 (en) Vacuum container and power distribution switchgear using the vacuum container
JP5253228B2 (en) Vacuum switch
KR20040086824A (en) Vacuum switch gear
JP2008027585A (en) Vacuum switch
JP2002319342A (en) Vacuum valve
JP3541287B2 (en) Bushing
JP3144833U (en) Power feedthrough terminal

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20050530

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20050607

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050727

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20051213

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20051213

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091222

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091222

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101222

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111222

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111222

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121222

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121222

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131222

Year of fee payment: 8

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees