JP3168910B2 - Electrode for vacuum valve - Google Patents
Electrode for vacuum valveInfo
- Publication number
- JP3168910B2 JP3168910B2 JP09505996A JP9505996A JP3168910B2 JP 3168910 B2 JP3168910 B2 JP 3168910B2 JP 09505996 A JP09505996 A JP 09505996A JP 9505996 A JP9505996 A JP 9505996A JP 3168910 B2 JP3168910 B2 JP 3168910B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- electrode
- outer peripheral
- arc running
- peripheral end
- 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
Links
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、アーク溝を有する
電極を改良した真空バルブ用電極に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode for a vacuum valve having an improved electrode having an arc groove.
【０００２】[0002]
【従来の技術】従来より真空遮断器においては、電極自
身に螺旋状の溝を設けて電極内を流れる電流の経路を制
御して、ほぼ円周方向に往復ループ状の電路を構成し、
それによって生じる磁界によりアークを駆動し、電極の
円周上を移動させることにより、アークの停滞を防止し
て、電極の局部溶解を避け、遮断性能の向上を図ってい
る。また、アークの発生瞬時より強力に磁気駆動するた
めに、アークの走行面と接触面とを一致させる構造が知
られている。即ち、外周部のアーク走行面を突出させ、
中央部を凹ませてアーク走行面にて対向電極と接触する
ようにしている。しかし、このような電極には次に述べ
るような欠点があった。すなわち、中央部の凹からアー
ク走行面の外周端まで切欠いたアーク溝（又は螺旋溝）
を複数設けて、アーク溝間に複数のアーク走行面を分割
されているため、アーク走行面を移動して外周先端部に
到達したアークは、走行面の先端で停滞する。アークが
停滞すると、電極が局部的にアークにより加熱されるた
め、電極溶融を引き起し、遮断失敗の原因となる。2. Description of the Related Art Conventionally, in a vacuum circuit breaker, a spiral groove is provided in an electrode itself to control a path of a current flowing through the electrode, thereby forming a reciprocating loop-like electric circuit in a substantially circumferential direction.
By driving the arc by the magnetic field generated thereby and moving it on the circumference of the electrode, stagnation of the arc is prevented, local melting of the electrode is avoided, and the breaking performance is improved. Further, there is known a structure in which the running surface of the arc and the contact surface coincide with each other in order to perform magnetic driving more strongly than at the moment when the arc is generated. That is, the arc running surface of the outer peripheral portion is projected,
The central portion is recessed so as to contact the counter electrode on the arc running surface. However, such an electrode has the following disadvantages. That is, an arc groove (or a spiral groove) cut out from a concave portion at the center to an outer peripheral end of the arc running surface.
Are provided, and a plurality of arc traveling surfaces are divided between the arc grooves, so that the arc which has moved on the arc traveling surface and reached the outer peripheral front end portion stagnates at the front end of the traveling surface. When the arc stagnates, the electrode is locally heated by the arc, causing the electrode to melt and causing a failure in breaking.
【０００３】特開昭60−74320 号公報および特開昭61−
29027 号公報等に、アーク走行面の外周部を電気抵抗の
高い金属体で接続し、アークが次のアーク走行面へ移行
しやすくする構成が開示されている。しかし、電極材と
は別の材料を取り付けるため、材料的な不連続が生じ
る。真空アークのアーク電圧は電極材料に依存し、アー
ク電圧の低い材料の所で安定する。従って、材料の組み
合わせにより、電極材と挿入部材の境界でアークが一度
停滞する。また、構造的にも接続部に段差が生じやす
く、接続部にアークが停滞することがある。JP-A-60-74320 and JP-A-61-74320
No. 29027 discloses a configuration in which the outer peripheral portion of an arc running surface is connected by a metal body having a high electric resistance so that the arc can easily move to the next arc running surface. However, since a material different from the electrode material is attached, material discontinuity occurs. The arc voltage of the vacuum arc depends on the electrode material, and is stabilized at a material having a low arc voltage. Therefore, the arc once stagnates at the boundary between the electrode material and the insertion member depending on the combination of the materials. Also, structurally, a step is likely to occur at the connection part, and the arc may stagnate at the connection part.
【０００４】また、アーク走行面は複数に分割され、そ
の一端が電極中央部で固定される構造のため、アーク走
行面を接触させたときの衝撃等により、アーク走行面が
変形を起こしやすい。アーク走行面が変形すると、電極
同士が一様に接触できず、接触抵抗を増加させることが
ある。接触抵抗の増加は、異常加熱等の不具合原因とな
る。これを改善するために、特開昭63−158722号公報に
真空遮断器用電極が提案されている。これを図７，図８
を利用して説明する。複数のアーク溝１３を介して隣接
するアーク走行面５間の対応電極側にリング形状の連絡
部１４Ａ（連絡部はリング形状の一部のみ図示した）を
設けて、アークを連絡部１４Ａで磁気駆動する旨記載さ
れている。Further, the arc traveling surface is divided into a plurality of parts, and one end thereof is fixed at the center of the electrode. Therefore, the arc traveling surface is easily deformed by an impact when the arc traveling surface is brought into contact. When the arc running surface is deformed, the electrodes cannot contact each other uniformly, which may increase the contact resistance. An increase in the contact resistance causes a problem such as abnormal heating. In order to improve this, an electrode for a vacuum circuit breaker is proposed in JP-A-63-158722. This is shown in FIGS.
The explanation will be made with reference to FIG. A ring-shaped connecting part 14A (only a part of the ring-shaped part is shown) is provided on the corresponding electrode side between the adjacent arc running surfaces 5 via the plurality of arc grooves 13, and the arc is magnetically generated by the connecting part 14A. It is described that it is driven.
【０００５】[0005]
【発明が解決しようとする課題】この電極２０では連絡
部１４Ａの外径と内径との幅寸法が広すぎるため（本発
明の連絡部１４と比較すれば明らかである）、一方側ア
ーク走行面と他方側アーク走行面を流れる電流ｉ3 の電
流通路が略等しくなり、アークが磁気駆動しにくくな
り、アークが停滞しやすい。連絡部１４Ａの幅寸法を広
く取る理由は、アーク走行面５に連絡部１４Ａの取付け
をロー材例えば銀ローにより接合している。アークが連
絡部１４Ａを磁気駆動する際には高温度に成り、銀ロー
を溶融し、電極が遮断不能を生ずる恐れがあるので、連
絡部１４Ａの幅寸法を広く取り、冷却を良くし、銀ロー
の溶融を防止したものと推測される。この電極では本発
明者逹の実験によれば、アークが停滞しやすく、高温度
に成り、銀ローを溶融し、電極が遮断不能を生じる欠点
があることがわかった。In the electrode 20, since the width of the outer diameter and the inner diameter of the connecting portion 14A is too wide (as is clear from the comparison with the connecting portion 14 of the present invention), the one-side arc running surface is provided. a current path of current i 3 flowing through the other side arc running face is substantially equal, the arc is hardly magnetically driven arc tends to stagnate. The reason for increasing the width of the connecting portion 14A is that the connecting portion 14A is attached to the arc running surface 5 by a brazing material such as a silver brazing. When the arc magnetically drives the connecting portion 14A, the temperature becomes high, the silver solder may be melted, and the electrode may not be cut off. Therefore, the width of the connecting portion 14A is widened, cooling is improved, and silver is removed. It is presumed that the melting of the row was prevented. According to experiments performed by the inventors of the present invention, it has been found that arcs are liable to stagnate, the temperature becomes high, the silver solder melts, and the electrode cannot be cut off.
【０００６】本発明の目的は、遮断電流容量の増減，遮
断電流容量の増減に応じた電極寸法及び重量を任意設計
できる真空バルブ用電極を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an electrode for a vacuum valve in which the size and weight of the electrode can be arbitrarily designed according to the increase / decrease of the breaking current capacity and the increase / decrease of the breaking current capacity.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明の真空バルブ用電極は、真空容器内に配置さ
れた真空容器外に伸びる接離自在な少なくとも一対の導
体に取っけられた電極と、この電極の中央部側から外周
側方向に延びた外周端側より電極側面に達する複数のア
ーク溝と、各アーク溝間に形成した複数のアーク走行面
と、上記アーク溝外周側とアーク走行面外周端との間の
アーク溝を跨いで両アーク走行面と一体に連絡し、且つ
両アーク走行面から流れる電流の通路が一方側アーク走
行面の方が他方側アーク走行面より長くた両アーク走行
面と同抵抗値を有する連絡部とを備え、上記連絡部の断
面積を調整して両アーク走行面から上記連絡部に流れる
電流たとえば一方側アーク走行面から他方側アーク走行
面に流れるように制御することにある。In order to achieve the above object, an electrode for a vacuum valve according to the present invention is mounted on at least a pair of conductors which can be separated from and separated from each other and extend outside a vacuum vessel arranged inside the vacuum vessel. An electrode, a plurality of arc grooves extending from a central portion side of the electrode in the outer peripheral direction to the electrode side surface from the outer peripheral end side, a plurality of arc running surfaces formed between the arc grooves, and the arc groove outer peripheral side. The two arc traveling surfaces are integrally connected to each other over the arc groove between the arc traveling surface and the outer peripheral edge of the arc traveling surface. A current flowing from the arc running surfaces to the connecting portion by adjusting the cross-sectional area of the connecting portions, for example, a current flowing from the one arc running surface to the other arc running; So that it flows over the surface Lies in the fact that Gosuru.
【０００８】具体的には連絡部の外径寸法Ｄ1と内径寸
法Ｄ2とのＤ2／Ｄ1の関係が０.９ を越え、１を下回る
幅寸法を持つ電極に設定することにある。More specifically, the relation of D 2 / D 1 between the outer diameter dimension D 1 and the inner diameter dimension D 2 of the connecting portion exceeds 0.9 and is set to an electrode having a width smaller than 1. .
【０００９】[0009]
【発明の実施の形態】以下本発明の実施例を図１乃至図
５により説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１０】図５は真空バルブの全体を示すもので、絶
縁筒１は両端に端板２を取り付けて真空容器３を構成し
ている。真空容器内には一対の固定電極４と可動電極５
を対応配置し、これらの電極裏面から真空容器外へ導体
６，７が伸びている。可動側導体７と端板２との間には
金属ベローズ８が取り付けられている。ベローズ８は、
可動側導体７に取り付けた取付金具９と端板２との間に
設けられている。ベローズ８は、可動側導体７に接続さ
れた操作器（図示せず）を駆動して、可動側導体７を軸
方向に移動する働きをする。可動側導体７の軸方向の動
きにより、固定電極４と可動電極５とは電気的に接離す
る。固定電極４から可動電極５を引き離すと、両電極間
に発生したアークＡによる金属微粒子を絶縁筒１に設け
たシールド１０に付着している。FIG. 5 shows the entirety of a vacuum valve, and an insulating cylinder 1 constitutes a vacuum vessel 3 with end plates 2 attached to both ends. A pair of fixed electrodes 4 and movable electrodes 5 are provided in the vacuum vessel.
And conductors 6 and 7 extend from the back surface of these electrodes to the outside of the vacuum container. A metal bellows 8 is attached between the movable-side conductor 7 and the end plate 2. Bellows 8
It is provided between the mounting bracket 9 attached to the movable-side conductor 7 and the end plate 2. The bellows 8 serves to drive an actuator (not shown) connected to the movable-side conductor 7 to move the movable-side conductor 7 in the axial direction. The fixed electrode 4 and the movable electrode 5 are electrically connected to and separated from each other by the axial movement of the movable-side conductor 7. When the movable electrode 5 is separated from the fixed electrode 4, fine metal particles due to the arc A generated between the two electrodes adhere to the shield 10 provided on the insulating cylinder 1.
【００１１】固定電極４と可動電極５は図１乃至図４の
図面により説明する。両電極は構造が同じなので、可動
電極５を例にとり説明し、固定電極４の説明は省略す
る。可動電極５は主に銅などの高導電性金属層１１と、
クロム，銅等の耐アーク性金属層１２とで構成されてい
る。耐アーク性金属層１２はクロム粉末を圧縮して、円
筒形状の圧粉体を成型し、これを加熱して気孔を有する
焼結合金にし、焼結合金を円筒形状の型にセット後、溶
融された銅と銅より少ないクロムを流し込んで高導電性
金属層１１を有する溶浸合金を形成する。この時、気孔
内の空気は溶融された銅と入れ替わり、除去されるの
で、この溶浸合金を使用した電極は真空容器内に配置し
て、真空引きする時の真空引き時間を縮小できるばかり
か、また真空を損なうことがない。The fixed electrode 4 and the movable electrode 5 will be described with reference to FIGS. Since both electrodes have the same structure, the movable electrode 5 will be described as an example, and the description of the fixed electrode 4 will be omitted. The movable electrode 5 mainly includes a highly conductive metal layer 11 such as copper,
And an arc-resistant metal layer 12 such as chromium or copper. The arc-resistant metal layer 12 compresses the chromium powder to form a cylindrical green compact, heats it into a sintered alloy having pores, sets the sintered alloy in a cylindrical mold, and then melts it. The infiltrated alloy having the highly conductive metal layer 11 is formed by pouring in less copper and less chromium than copper. At this time, the air in the pores is replaced by the molten copper and removed, so that the electrode using this infiltrated alloy is arranged in a vacuum vessel, and not only can the vacuuming time for vacuuming be reduced. , And does not impair the vacuum.
【００１２】溶浸合金を切削して上記電極を形成してい
る。高導電性金属層１１と耐アーク性金属層１２との境
界層は合金を形成しており、ロー材例えば銀ローより融
点が高く、溶融しにくく、耐アークに強く電流遮断容量
の向上に上述と共に寄与することが出来る。可動電極５
は電極中央部の凹部５Ａと接触面を兼ねるようにその外
側にアーク走行面５Ｂ，５Ｃ，５Ｄを一体に設け、各ア
ーク走行面５Ｂ，５Ｃ，５Ｄ間には凹部５Ａからアーク
走行面５Ｂ，５Ｃ，５Ｄの外周端５Ｅの手前までにアー
ク溝１３Ａ〜１３Ｃを螺旋状に切られている。The electrode is formed by cutting an infiltrated alloy. The boundary layer between the highly conductive metal layer 11 and the arc-resistant metal layer 12 is formed of an alloy, and has a higher melting point than a brazing material, for example, silver brazing, is less likely to melt, is more resistant to arcing, and has a higher current interruption capacity. Can contribute together. Movable electrode 5
Are integrally provided with arc running surfaces 5B, 5C, 5D outside thereof so as to also serve as a contact surface with the recess 5A at the center of the electrode, and between the arc running surfaces 5B, 5C, 5D, from the recess 5A to the arc running surfaces 5B, 5D. The arc grooves 13A to 13C are cut spirally before the outer peripheral end 5E of 5C and 5D.
【００１３】複数のアーク溝１３Ａ〜１３Ｃは凹部５Ａ
からアーク溝の外周側先端部１３Ｅより電極側面に達し
ている。各アーク溝間に複数のアーク走行面５Ａ〜５Ｃ
を形成している。連絡部１４は外周側先端部１３Ｅとア
ーク走行面外周端５Ｅとの間のアーク溝１３Ａ〜１３Ｃ
を跨いでいる。つまち橋の役割をしている。連絡部１４
は両アーク走行面５Ｂ〜５Ｄと一体に形成すると共に、
両アーク走行面５Ａ〜５Ｃと同じ抵抗値を有している。The plurality of arc grooves 13A to 13C are formed as recesses 5A.
From the outer peripheral end 13E of the arc groove to the electrode side surface. Multiple arc running surfaces 5A to 5C between each arc groove
Is formed. The connecting portion 14 is formed between the outer peripheral end 13E and the arc groove 13A to 13C between the arc running surface outer peripheral end 5E.
Straddling. Plays the role of Tsumachi Bridge. Contact 14
Are formed integrally with both arc running surfaces 5B to 5D,
It has the same resistance as the two arc running surfaces 5A to 5C.
【００１４】このため、アークＡが各アーク走行面と連
絡部１４とを流れ時の発生熱が少なく、電極の電流容量
を向上することが出来る。連絡部１４は両アーク走行面
５Ｂ〜５Ｄと一体に形成することは、連絡部１４と両ア
ーク走行面５Ｂ〜５Ｄとの表面を等しい高さにできるの
で、軸方向を図８に比べて縮小出来るばかりか、また電
界集中がなく、電界を緩和することが出来るので、更に
遮断電流容量を向上することが出来る。For this reason, the heat generated when the arc A flows through each arc running surface and the connecting portion 14 is small, and the current capacity of the electrode can be improved. When the connecting portion 14 is formed integrally with the two arc running surfaces 5B to 5D, the surfaces of the connecting portion 14 and the two arc running surfaces 5B to 5D can be made equal in height, so that the axial direction is reduced as compared with FIG. Not only is it possible, but also there is no electric field concentration and the electric field can be reduced, so that the breaking current capacity can be further improved.
【００１５】一方側アーク走行面例えば５Ｂを流れる電
流ｉ1 の電流通路の方が他方側アーク走行面５Ｄを流れ
る分流電流ｉ2 の電流通路より長く形成されている時
に、一方側アーク走行面５Ｂから他方側アーク走行面５
Ｄに電流ｉ1 が流れるように上記連絡部１４を調整して
電流を制御する。例えば連絡部１４の外径と内径との間
の幅Ｌを設定する。具体的には、連絡部１４の外径寸法
Ｄ1と内径寸法Ｄ2とのＤ2／Ｄ1の関係が０.９ を越え、
１を下回る幅Ｌ寸法に設定する。又連絡部１４は一方側
アーク走行面例えば５Ｂを流れる電流ｉ1 の電流通路の
方が他方側アーク走行面５Ｄを流れる分流電流ｉ2 の電
流通路より長くなように設けられていることになる。When the current path of the current i 1 flowing through the one-side arc running surface 5B, for example, is longer than the current path of the shunt current i 2 flowing through the other arc running surface 5D, the one-side arc running surface 5B From the other side arc running surface 5
The current is controlled by adjusting the connection portion 14 so that the current i 1 flows through D. For example, a width L between the outer diameter and the inner diameter of the connecting portion 14 is set. Specifically, the relationship of D 2 / D 1 between the outer diameter dimension D 1 and the inner diameter dimension D 2 of the connecting portion 14 exceeds 0.9,
The width L is set to be less than 1. The contact portion 14 will be provided so as to be longer than the current path of the shunt current i 2 that towards the current path of the current i 1 flowing through the first side arc running face for example 5B flows the other side arc running face 5D .
【００１６】この固定電極４と可動電極５とを図５のよ
うに対応配置すれば、電極内を流れる電流ｉ1 の経路を
制御して、ほぼ円周方向に往復の電路を構成することが
できる。この電路に電流ｉ1 が流れる時に発生する磁界
Ｈにより、電極間に発生したアークＡは電極の円周方向
に駆動され、アーク走行面上を移動する。By arranging the fixed electrode 4 and the movable electrode 5 in correspondence with each other as shown in FIG. 5, it is possible to control the path of the current i 1 flowing in the electrode, thereby forming a reciprocating electric path substantially in the circumferential direction. it can. The magnetic field H generated when the current i 1 flows in this path, the arc A generated between the electrodes is driven in the circumferential direction of the electrode, moves on the arc running face.
【００１７】例えばアーク走行面５Ｂ上を移動し、アー
ク走行面５Ｄとの境界に来た時、アークＡは連絡部１４
を通過して、アーク走行面５Ｄに移行するはずである
が、アーク走行面５Ｄの電流ｉ1はアーク溝１３Ａを介
して分流する所謂分流電流ｉ2が流れる。分流電流ｉ2は
アーク走行面５Ｂの電流ｉ1がアーク走行面５Ｄに流れ
るのを阻止する働きをし、アーク２１が連絡部１４付近
で停滞し、電極の局部加熱，局部溶融になり、遮断不能
を生じることがあることに本発明者逹は気付いた。そこ
で、本発明者逹は、連絡部１４の断面積例えば幅，厚み
等を調整して、電流ｉ1，分流電流ｉ2が連絡部１４に流
れるのを制御することで、上述の課題を解決した。即
ち、連絡部１４の外径寸法Ｄ1と内径寸法Ｄ2とのＤ2／
Ｄ1の関係が０.９ を越え、１を下回る幅Ｌ寸法に設定
した。この結果、アークＡは電極の円周方向に駆動さ
れ、アーク走行面上を磁気駆動して、著しく遮断電流容
量を増加することが出来るようになった。例えば連絡部
１０の幅Ｌを調整しない従来技術の電極の遮断電流容量
を１とすれば、本発明の電極の遮断電流容量を２にすこ
とが出来るようになった。この分、本発明の電極は従来
技術の電極に比べて小型化及び軽量化を計ることが出来
るようになった。For example, when moving on the arc running surface 5B and reaching the boundary with the arc running surface 5D, the arc A is transmitted to the connecting portion 14A.
Through the, but it should shift to the arc running face 5D, the current i 1 of the arc running face 5D flows so-called shunt current i 2 shunting through the arc groove 13A is. Shunt current i 2 is a function of current i 1 of the arc running face 5B is prevented from flowing into the arc running face 5D, the arc 21 stagnates in the vicinity of contact portion 14, localized heating of the electrodes, becomes local melting, blocked The present inventors have noticed that disability may occur. Therefore, the present inventors have solved the above-mentioned problem by controlling the current i 1 and the shunt current i 2 flowing to the communication portion 14 by adjusting the cross-sectional area, for example, the width and the thickness of the communication portion 14. did. That is, D 2 / D of the outer diameter D 1 and the inner diameter D 2 of the connecting portion 14.
The width L was set so that the relationship of D 1 exceeded 0.9 and was less than 1. As a result, the arc A is driven in the circumferential direction of the electrode, magnetically drives the arc running surface, and the breaking current capacity can be significantly increased. For example, if the breaking current capacity of the electrode of the related art in which the width L of the connecting portion 10 is not adjusted is set to 1, the breaking current capacity of the electrode of the present invention can be set to 2. As a result, the electrode of the present invention can be made smaller and lighter than the conventional electrode.
【００１８】この理由は、連絡部１４の幅Ｌ寸法が０.
９ 以下になると、幅寸法が広くなり、分流電流ｉ2が電
流ｉ1より多く流れ、電流ｉ1 が連絡部１４付近で停滞
して、遮断不能を生じる。連絡部１４の幅寸法が１以上
になると、上述とは逆に連絡部１４の幅寸法が狭くな
り、連絡部１４を電流ｉ1 が流れ過ぎて、磁界Ｈが強く
なり、アークＡが電磁力Ｆにより電極より外部に飛び出
してシールド１０に衝突し、遮断器として使用できな
い。従って、外径寸法Ｄ1と内径寸法Ｄ2とのＤ2／Ｄ1の
関係が０.９ を越え、１を下回る幅Ｌ寸法に設定する
と、電流ｉ1 と分流電流ｉ2 が連絡部１４に流れるのを
適宜に制御することが出来る。この場合、分流電流ｉ2
を制御するほうが、電流ｉ1に比べて連絡部１４の幅を
狭くできるので、電極の重量を軽くできる利点がある。
この結果、上述の効果を達成することが出来る。このこ
とは、幅Ｌを調整するだけで遮断電流容量の増減，遮断
電流容量の増減に応じた電極寸法及び重量を任意設計で
きる。連絡部１４の調整は幅Ｌと下記厚みとを調整すれ
ばより好ましい。連絡部１４の幅Ｌを調整する場合に
は、作業者が連絡部１４の幅Ｌを見ながら微調整ができ
るので、調整作業がやりやすく、作業能率が良い。The reason for this is that the width L of the connecting portion 14 is set to be 0.
Becomes 9 or less, the width is widened, flow number shunt current i 2 is than the current i 1, stagnant current i 1 is in the vicinity of contact portion 14, resulting in non blocking. If the width of the connecting portion 14 becomes 1 or more, the width of the connecting portion 14 becomes narrower, contrary to the above, the current i 1 flows too much through the connecting portion 14, the magnetic field H becomes strong, and the arc A becomes electromagnetic force. F causes the electrode to jump out of the electrode and collide with the shield 10, and cannot be used as a circuit breaker. Therefore, if the relationship of D 2 / D 1 between the outer diameter dimension D 1 and the inner diameter dimension D 2 exceeds 0.9 and is set to a width L dimension smaller than 1, the current i 1 and the shunt current i 2 are transmitted to the communication section 14. Can be appropriately controlled. In this case, the shunt current i 2
Is advantageous in that the weight of the electrode can be reduced because the width of the connecting portion 14 can be reduced as compared with the current i 1 .
As a result, the above-described effects can be achieved. This means that only by adjusting the width L, it is possible to arbitrarily design the electrode size and weight according to the increase / decrease of the breaking current capacity and the increase / decrease of the breaking current capacity. It is more preferable to adjust the connecting portion 14 by adjusting the width L and the following thickness. When adjusting the width L of the communication portion 14, the operator can make fine adjustments while watching the width L of the communication portion 14, so that the adjustment work is easy and the work efficiency is good.
【００１９】次に、電極の径を変えた場合の本発明の電
極と従来技術の電極（特開昭63−158722号公報）とのＤ
2／Ｄ1の関係による性能を比較した表を下記に示す。Next, the D of the electrode of the present invention and the electrode of the prior art (JP-A-63-158722) when the diameter of the electrode is changed is described.
A table comparing the performance of the 2 / D 1 related below.
【００２０】[0020]
【表１】 [Table 1]
【００２１】この表の上段から２段目，４段目，６段目
の遮断電流をみれば、本発明の電極は従来技術の電極に
比べて約２倍の遮断電流を有する。Looking at the cutoff currents at the second, fourth, and sixth stages from the top of the table, the electrode of the present invention has a cutoff current approximately twice that of the prior art electrode.
【００２２】更に、本発明の他の実施例を以下説明す
る。Further, another embodiment of the present invention will be described below.
【００２３】．電極中心側よりアーク溝外周端側に接
する接線Ｓを引き、下側はアーク溝１３Ｃと対応してい
る連絡部１４はこの一側を接線Ｓと同じ位置に、他側を
例えば一方側アーク走行面５Ｄ側であって接線Ｓと同じ
方向に設けると、連絡部１４の幅Ｌは外周側先端部１３
Ｅとアーク走行面外周端５Ｅとの間の他の個所より狭い
個所に設けることができるので、電流ｉ1，ｉ2を制御す
る調整がしやすく、調整作業効率が良い。[0023] A tangent line S is drawn from the electrode center side in contact with the outer peripheral end side of the arc groove. When provided on the surface 5D side in the same direction as the tangent line S, the width L of the connecting portion 14 is
Since it can be provided at a location narrower than the other location between E and the arc running surface outer peripheral end 5E, the adjustment for controlling the currents i 1 and i 2 is easy, and the adjustment work efficiency is good.
【００２４】．アーク溝１３Ａと対応する連絡部１４
の厚み寸法を０.５(mm）〜５（mm）の範囲に設定する。
厚み寸法を５（mm）以上になると、高導電性金属層１１
に達し、分流電流ｉ2が流れ込みが、電流ｉ1より多くな
り、アークＡが磁気駆動しにくくなり、上述と同様な欠
点を生じる。又０.５(mm）以下になると、アークＡによ
り電極が消耗し、機械的強度がなくなり、電極の寿命が
短く、経済的でない。そして、連絡部１４の調整は幅Ｌ
と厚みとを調整すれば、分流電流の制御により効果的で
ある。[0024] Connecting portion 14 corresponding to arc groove 13A
Is set in the range of 0.5 (mm) to 5 (mm).
When the thickness dimension is 5 (mm) or more, the highly conductive metal layer 11
, And the shunt current i 2 flows in more than the current i 1 , making it difficult for the arc A to be magnetically driven, causing the same drawbacks as described above. If the thickness is less than 0.5 (mm), the electrode is consumed by the arc A, the mechanical strength is lost, the life of the electrode is short, and it is not economical. And the adjustment of the communication part 14 is width L
If the thickness and the thickness are adjusted, it is more effective to control the shunt current.
【００２５】．アーク走行面５Ｂ〜５Ｄの外周端に形
成したＲ面１５を０.５(mm)〜１.５Ｒ（mm）の範囲に設
定する。その理由は、０.５(mm）以下にすると、耐電圧
が小さくなり、放電がしやすくなる。又１.５Ｒ(mm）以
上になると、アークＡが大きくなりすぎて、シールド側
に膨らみ真空バルブの直径が大型化する欠点がある。[0025] The R surface 15 formed on the outer peripheral end of the arc running surfaces 5B to 5D is set in a range of 0.5 (mm) to 1.5R (mm). The reason is that if the thickness is 0.5 (mm) or less, the withstand voltage becomes small, and discharge becomes easy. If it exceeds 1.5R (mm), the arc A becomes too large, swells to the shield side, and the diameter of the vacuum valve becomes large.
【００２６】．図６に示すアーク溝１３Ａ〜１３Ｃは
凹部５Ａよりアーク走行面外周端に延びる直線形状であ
っても良い。この場合、アーク溝１３Ａ〜１３Ｃの溝外
周端側とアーク走行面外周端との間に連絡部１４を設け
ていることは云うまでもない。[0026] The arc grooves 13A to 13C shown in FIG. 6 may have a linear shape extending from the recess 5A to the outer peripheral end of the arc running surface. In this case, it goes without saying that the connecting portion 14 is provided between the outer peripheral end of the arc grooves 13A to 13C and the outer peripheral end of the arc running surface.
【００２７】．図７，図８は電極２０の中央部側から
外周端側に複数のアーク溝１３を延ばし、複数のアーク
溝間にアーク走行面５を形成し、アーク溝外周端側とア
ーク走行面外周端との間であって他方側電極と対応する
アーク走行面間にリング形状の連絡部１４を設けてい
る。一方側アーク走行面を流れる電流ｉ1 が他方側アー
ク走行面を流れる分流電流ｉ2 の電流通路より長く形成
されている時に、一方側アーク走行面から他方側アーク
走行面に電流が流れるように連絡部１４の外径寸法Ｄ1
と内径寸法Ｄ2 とのＤ2／Ｄ1の関係が０.９ を越え、１
を下回る幅寸法に設定する真空バルブ用電極に使用して
も、上述と同様な作用効果を達成することが出来る。こ
の場合、連絡部１４の外周端にはＲ面１５を０.５（m
m）〜１.５Ｒ(mm）の範囲に設定することにより、上述
と同様な効果を達成することが出来る。又アーク溝と対
応する連絡部１４は請求項１のように電流ｉ1 が一方側
アーク走行面から他方側アーク走行面に流れるように連
絡部１４の断面積を調整しても良い。[0027] 7 and 8 show a case where a plurality of arc grooves 13 extend from the center portion of the electrode 20 to the outer peripheral end, and the arc running surface 5 is formed between the plurality of arc grooves. And a ring-shaped connecting portion 14 is provided between the other side electrode and the corresponding arc traveling surface. On the other hand, when the current i 1 flowing through the side arc running face is longer than the current path of the shunt current i 2 flowing through the other side arc running face, whereas from the side arc running face so that a current flows to the other side arc running face Outer diameter dimension D 1 of connecting part 14
The relationship of D 2 / D 1 between the diameter and the inner diameter D 2 exceeds 0.9, and
The same operation and effect as described above can be achieved by using the electrode for a vacuum valve having a width smaller than the above. In this case, the outer surface 15 of the connecting portion 14 is provided with the
m) to 1.5R (mm), the same effects as described above can be achieved. The contact portion 14 corresponding to the arc groove may adjust the cross-sectional area of connecting member 14 so as to flow a current i 1 is from one side the arc running face on the other side arc running face as claimed in claim 1.
【００２８】[0028]
【発明の効果】本発明の真空バルブ用電極によれば、遮
断電流容量の増減，遮断電流容量の増減に応じた電極寸
法及び重量を任意設計できる。According to the electrode for a vacuum valve of the present invention, the size and weight of the electrode can be arbitrarily designed according to the increase and decrease of the breaking current capacity and the increase and decrease of the breaking current capacity.
【図１】本発明の実施例として示した図５の真空遮断器
用電極に使用した可動電極の平面図である。FIG. 1 is a plan view of a movable electrode used for the vacuum circuit breaker electrode of FIG. 5 shown as an embodiment of the present invention.
【図２】図１のII−II線断面図である。FIG. 2 is a sectional view taken along line II-II of FIG.
【図３】図５の真空遮断器用電極に使用した可動電極の
斜視図である。FIG. 3 is a perspective view of a movable electrode used for the vacuum circuit breaker electrode of FIG.
【図４】図１の可動電極の平面図である。FIG. 4 is a plan view of the movable electrode of FIG.
【図５】本発明の実施例として示した真空バルブの側断
面図である。FIG. 5 is a side sectional view of a vacuum valve shown as an embodiment of the present invention.
【図６】本発明の別の実施例を示す電極の平面図であ
る。FIG. 6 is a plan view of an electrode showing another embodiment of the present invention.
【図７】本発明の別の実施例を示す電極の平面図であ
る。FIG. 7 is a plan view of an electrode showing another embodiment of the present invention.
【図８】図７の電極の断面図である。FIG. 8 is a sectional view of the electrode of FIG. 7;
５…可動電極、５Ｂ〜５Ｄ…アーク走行面、５Ｅ…電極
外周端、１３Ａ〜13Ｃ…アーク溝、１４…連絡部、Ｌ…
幅。Reference numeral 5: movable electrode, 5B to 5D: arc running surface, 5E: outer peripheral end of the electrode, 13A to 13C: arc groove, 14: connecting portion, L ...
width.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岡部 均 茨城県日立市国分町一丁目１番１号 株 式会社 日立製作所 国分工場内 (72)発明者 後藤 芳友 茨城県日立市国分町一丁目１番１号 株 式会社 日立製作所 国分工場内 (72)発明者 小室 勝博 茨城県日立市大みか町七丁目１番１号 株式会社 日立製作所 日立研究所内 (72)発明者 和田 昭 茨城県日立市大みか町七丁目２番１号 株式会社 日立製作所 電力・電機開発 本部内 (72)発明者 佐藤 隆 茨城県日立市大みか町七丁目２番１号 株式会社 日立製作所 電力・電機開発 本部内 (56)参考文献 特開 昭55−68020（ＪＰ，Ａ) 特開 昭59−54134（ＪＰ，Ａ) 特開 昭63−88721（ＪＰ，Ａ) 特開 平１−105428（ＪＰ，Ａ) 特開 平２−44622（ＪＰ，Ａ) 実開 昭50−86256（ＪＰ，Ｕ) 実開 昭51−83762（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01H 33/66 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hitoshi Okabe 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Inside the Kokubu Plant of Hitachi, Ltd. (72) Inventor Yoshitomo Goto 1-1-1 Kokubuncho, Hitachi City, Ibaraki Prefecture No. 1 Hitachi, Ltd. Kokubu Plant (72) Inventor Katsuhiro Komuro 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture Hitachi, Ltd., Hitachi Research Laboratory (72) Inventor Akira Wada Omika-cho, Hitachi City, Ibaraki Prefecture 7-2-1, Hitachi, Ltd. Power and Electricity Development Division (72) Inventor Takashi Sato 7-2-1, Omika-cho, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Power and Electricity Development Division (56) References JP-A-55-68020 (JP, A) JP-A-59-54134 (JP, A) JP-A-63-88721 (JP, A) JP-A-1-105428 (JP, A) A) JP-A-2-44622 (JP, A) JP-A 50-86256 (JP, U) JP-A 51-83762 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) ) H01H 33/66
Claims (13)
る接離自在な少なくとも一対の導体に取りつけられた電
極と、この電極の中央部側から外周側方向に延びた外周
端側より電極側面に達する複数のアーク溝と、各アーク
溝間に形成した複数のアーク走行面と、上記アーク溝外
周側とアーク走行面外周端との間のアーク溝を跨いで両
アーク走行面と一体に連絡し、且つ両アーク走行面から
流れる電流の通路が一方側アーク走行面の方が他方側ア
ーク走行面より長くした両アーク走行面と同抵抗値を有
する連絡部とを備え、上記連絡部の断面積を調整して両
アーク走行面から上記連絡部に流れる電流を制御するこ
とを特徴とする真空バルブ用電極。1. An electrode attached to at least a pair of conductors which extend outside the vacuum vessel and which are arranged inside the vacuum vessel and which can be freely contacted and separated, and an electrode which extends from a central portion of the electrode toward an outer peripheral side thereof. A plurality of arc grooves reaching the side surface, a plurality of arc traveling surfaces formed between the arc grooves, and both arc traveling surfaces integrally straddling the arc groove between the arc groove outer peripheral side and the arc traveling surface outer peripheral end. A communication portion having the same resistance value as the two arc running surfaces that are in contact with each other and the current flowing from both arc running surfaces is longer on the one side arc running surface than on the other side arc running surface; An electrode for a vacuum valve, wherein a cross-sectional area is adjusted to control a current flowing from both arc running surfaces to the connecting portion.
る接離自在な少なくとも一対の導体に取りつけられた電
極と、この電極の中央部側から外周側方向に延びた外周
端側より電極側面に貫通する複数のアーク溝と、各アー
ク溝間に形成した複数のアーク走行面と、上記アーク溝
外周側とアーク走行面外周端との間のアーク溝を跨いで
両アーク走行面と一体に連絡し、且つ両アーク走行面か
ら流れる電流の通路が一方側アーク走行面の方が他方側
アーク走行面より長くした両アーク走行面と同抵抗値を
有する連絡部とを備え、上記連絡部の外径寸法Ｄ1と内
径寸法Ｄ2とのＤ2／Ｄ1の関係が０.９ を越え、１を下
回る幅寸法にすることを特徴とする真空バルブ用電極。2. An electrode attached to at least a pair of conductors which extend outside the vacuum vessel and which are disposed inside the vacuum vessel, and which are attached to and detachable from each other, and an electrode which extends from a central portion of the electrode to an outer peripheral end of the electrode. A plurality of arc grooves penetrating the side surface, a plurality of arc running surfaces formed between the arc grooves, and an arc groove between the arc groove outer peripheral side and the arc running surface outer peripheral end; And a communication portion having the same resistance as the two arc running surfaces in which the path of the current flowing from both arc running surfaces is longer on the one side arc running surface than the other side arc running surface; A relation of D 2 / D 1 between the outer diameter dimension D 1 and the inner diameter dimension D 2 of more than 0.9 and less than 1.
る接離自在な少なくとも一対の導体に取りつけられた電
極と、この電極の中央部側から外周側方向に延びた外周
端側より電極側面に達する複数のアーク溝と、各アーク
溝間に形成した複数のアーク走行面と、上記アーク溝外
周側とアーク走行面外周端との間のアーク溝を跨いで両
アーク走行面と一体に連絡し、且つ両アーク走行面から
流れる電流の通路が一方側アーク走行面の方が他方側ア
ーク走行面より長くした両アーク走行面と同抵抗値を有
する連絡部とを備え、上記連絡部の厚さ寸法を０.５(m
m）〜５（mm）の範囲に設定することを特徴とする真空
バルブ用電極。3. An electrode attached to at least one pair of conductors which extend outside the vacuum vessel and which are arranged inside the vacuum vessel and which are freely contactable and detachable, and an electrode which extends from a central portion of the electrode toward an outer peripheral side thereof. A plurality of arc grooves reaching the side surface, a plurality of arc traveling surfaces formed between the arc grooves, and both arc traveling surfaces integrally straddling the arc groove between the arc groove outer peripheral side and the arc traveling surface outer peripheral end. A communication portion having the same resistance value as the two arc running surfaces that are in contact with each other and the current flowing from both arc running surfaces is longer on the one side arc running surface than on the other side arc running surface; 0.5 (m
An electrode for a vacuum valve, wherein the electrode is set in a range of m) to 5 (mm).
る接離自在な少なくとも一対の導体に取りつけられた電
極と、この電極の中央部側から外周側方向に延びた外周
端側より電極側面に達する複数のアーク溝と、各アーク
溝間に形成した複数のアーク走行面と、上記アーク溝外
周側とアーク走行面外周端との間のアーク溝を跨いで両
アーク走行面と一体に連絡し、且つ両アーク走行面から
流れる電流の通路が一方側アーク走行面の方が他方側ア
ーク走行面より長くした両アーク走行面と同抵抗値を有
する連絡部とを備え、上記連絡部の断面積を調整して両
アーク走行面から上記連絡部に流れる電流を制御すると
共に、上記アーク走行面の外周端に形成したＲ面を０.
５（mm）〜１.５Ｒ（mm）の範囲に設定することを特徴
とする真空バルブ用電極。4. An electrode attached to at least one pair of conductors which extend outside the vacuum vessel and which are arranged inside the vacuum vessel and which can be freely contacted and separated, and an electrode which extends from a central portion of the electrode to an outer peripheral end thereof in an outer peripheral direction. A plurality of arc grooves reaching the side surface, a plurality of arc traveling surfaces formed between the arc grooves, and both arc traveling surfaces integrally straddling the arc groove between the arc groove outer peripheral side and the arc traveling surface outer peripheral end. A communication portion having the same resistance value as the two arc running surfaces that are in contact with each other and the current flowing from both arc running surfaces is longer on the one side arc running surface than on the other side arc running surface; The cross-sectional area is adjusted to control the current flowing from the both arc running surfaces to the connecting portion, and the R surface formed at the outer peripheral end of the arc running surface is set to 0.1.
An electrode for a vacuum valve, wherein the electrode is set in a range of 5 (mm) to 1.5 R (mm).
る接離自在な少なくとも一対の導体に取りつけられた電
極と、この電極の中央部側から外周側方向に延びた外周
端側より電極側面に達する複数のアーク溝と、各アーク
溝間に形成した複数のアーク走行面と、上記アーク溝外
周側とアーク走行面外周端との間のアーク溝を跨いで両
アーク走行面と一体に連絡し、且つ両アーク走行面から
流れる電流の通路が一方側アーク走行面の方が他方側ア
ーク走行面より長くした両アーク走行面と同抵抗値を有
する連絡部とを備え、上記連絡部の厚み寸法を０.５(m
m）〜５（mm）の範囲に、上記アーク走行面の外周端に
形成したＲ面を０.５（mm）〜１.５Ｒ(mm)の範囲に、そ
れぞれに設定することを特徴とする真空バルブ用電極。5. An electrode attached to at least a pair of conductors which extend outside the vacuum vessel and which are disposed inside the vacuum vessel and which can be freely contacted and separated, and an electrode which extends from a central portion of the electrode toward an outer peripheral side thereof. A plurality of arc grooves reaching the side surface, a plurality of arc traveling surfaces formed between the arc grooves, and both arc traveling surfaces integrally straddling the arc groove between the arc groove outer peripheral side and the arc traveling surface outer peripheral end. A communication portion having the same resistance value as the two arc running surfaces that are in contact with each other and the current flowing from both arc running surfaces is longer on the one side arc running surface than on the other side arc running surface; 0.5 (m
m) to 5 (mm), and the R surface formed on the outer peripheral end of the arc running surface is set to a range of 0.5 (mm) to 1.5 R (mm). Electrode for vacuum valve.
５（mm）〜１.５Ｒ（mm）の範囲に設定することを特徴
とする請求項１又は２項記載の真空バルブ用電極。6. An R surface formed on an outer peripheral end of the connecting portion is set to a radius of 0.1 mm.
3. The electrode for a vacuum valve according to claim 1, wherein the electrode is set in a range of 5 (mm) to 1.5 R (mm).
する接線を引き、接線と一方側アーク走行面外周端とア
ーク溝外周端付近の間にアーク溝と対応する連絡部を設
けたことを特徴とする請求項１乃至５項のいずれか１項
記載の真空バルブ用電極。7. A connecting portion corresponding to the arc groove is provided between the tangent line, the outer peripheral end of the one-sided arc running surface and the vicinity of the outer peripheral end of the arc groove. The electrode for a vacuum valve according to any one of claims 1 to 5, characterized in that:
焼結合金に溶融された高導電性金属を流し込んで形成し
た溶浸合金を使用することを特徴とする請求項１乃至７
項のいずれか１項記載の真空バルブ用電極。8. An infiltration alloy formed by pouring a molten highly conductive metal into a sintered alloy of an arc-resistant metal having pores in said electrode.
Item 7. An electrode for a vacuum valve according to any one of the above items.
しい高さにすることを特徴とする請求項１乃至８項のい
ずれか１項記載の真空バルブ用電極。9. The electrode for a vacuum valve according to claim 1, wherein the surfaces of the connecting portion and the two arc running surfaces have the same height.
の電極材を使用することを特徴とする請求項１乃至８項
のいずれか１項記載の真空バルブ用電極。10. The electrode for a vacuum valve according to claim 1, wherein the connecting portion and the two arc running surfaces are made of the same electrode material.
びる接離自在な少なくとも一対の導体に取りつけられた
電極と、この電極の中央部側から外周端側に延びた複数
のアーク溝と、各アーク溝間に形成した複数のアーク走
行面と、上記アーク溝外周端側とアーク走行面外周端と
の間であって他方側電極と対応するアーク走行面間に設
けた両アーク走行面から流れる電流の通路が一方側アー
ク走行面の方が他方側アーク走行面より長くしたリング
形状の連絡部とを備え、上記連絡部の外径寸法Ｄ1 と内
径寸法Ｄ2 とのＤ2／Ｄ1の関係が０.９ を越え、１を下
回る幅寸法に設定することを特徴とする真空バルブ用電
極。11. An electrode attached to at least one pair of conductors which extend outside the vacuum vessel and which are arranged inside the vacuum vessel and which can be freely contacted and separated, and a plurality of arc grooves extending from a central portion side to an outer peripheral end side of the electrode. A plurality of arc running surfaces formed between the respective arc grooves, and both arc running surfaces provided between the arc groove outer peripheral end side and the arc running surface outer peripheral end and between the arc running surfaces corresponding to the other electrode. The path of the current flowing from the first side is provided with a ring-shaped connecting portion in which the one-side arc running surface is longer than the other-side arc running surface, and D 2 / D of the outer diameter D 1 and the inner diameter D 2 of the connecting portion. An electrode for a vacuum valve, wherein the relationship of D 1 is set to a width dimension exceeding 0.9 and less than 1.
面積を電流が一方側アーク走行面から他方側アーク走行
面間に流れるように調整することを特徴とする請求項１
０項記載の真空バルブ用電極。12. A cross-sectional area of said connecting portion corresponding to said arc groove is adjusted so that a current flows from one side arc running surface to another side arc running surface.
Item 7. The electrode for a vacuum valve according to Item 0.
０.５（mm）〜１.５Ｒ（mm）の範囲に設定することを特
徴とする請求項１０項記載の真空バルブ用電極。13. The electrode for a vacuum valve according to claim 10, wherein an R surface formed at an outer peripheral end of said connecting portion is set in a range of 0.5 (mm) to 1.5 R (mm). .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09505996A JP3168910B2 (en) | 1995-04-26 | 1996-04-17 | Electrode for vacuum valve |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10190195 | 1995-04-26 | ||
| JP7-101901 | 1995-04-26 | ||
| JP09505996A JP3168910B2 (en) | 1995-04-26 | 1996-04-17 | Electrode for vacuum valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0917296A JPH0917296A (en) | 1997-01-17 |
| JP3168910B2 true JP3168910B2 (en) | 2001-05-21 |
Family
ID=26436351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09505996A Expired - Fee Related JP3168910B2 (en) | 1995-04-26 | 1996-04-17 | Electrode for vacuum valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3168910B2 (en) |
-
1996
- 1996-04-17 JP JP09505996A patent/JP3168910B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0917296A (en) | 1997-01-17 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |