JPS63174232A - Vacuum valve - Google Patents
Vacuum valveInfo
- Publication number
- JPS63174232A JPS63174232A JP323787A JP323787A JPS63174232A JP S63174232 A JPS63174232 A JP S63174232A JP 323787 A JP323787 A JP 323787A JP 323787 A JP323787 A JP 323787A JP S63174232 A JPS63174232 A JP S63174232A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- contact
- coil
- face plate
- vacuum valve
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 38
- 229910017813 Cu—Cr Inorganic materials 0.000 claims description 19
- 239000012779 reinforcing material Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 11
- 239000010949 copper Substances 0.000 description 7
- 230000008018 melting Effects 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Valves And Accessory Devices For Braking Systems (AREA)
- Compressor (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の目的〕
(産業上の利用分野)
本発明は、真空バルブに係り、特に、低サージ性能およ
び大電流遮断性能に優れた電極の構造に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a vacuum valve, and particularly to an electrode structure with excellent low surge performance and high current interrupting performance.
(従来の技術)
従来、低サージ性能を考慮した真空バルブとしては、た
とえば、特開昭58−38425号公報が知られている
。この真空バルブの構造は、第7図、第8図および第9
図に示すように、絶縁円筒1の両端開口部を端板2,3
で閉止して真空容器4を形成し、この内部に接離自在と
した一対の電極5,6を配設して構成したもので、電極
5の固定通電軸7は端板2に固定して取付けられ、電極
6の可動通電軸8は端板3にベローズ9を介して移動自
在に取付けられ、電極5,6の周りを囲むアークシール
ド10は絶縁円筒1に取付けられ、ベローズカバー11
は通電軸8に取付けられている。(Prior Art) Conventionally, as a vacuum valve considering low surge performance, for example, Japanese Patent Application Laid-Open No. 58-38425 is known. The structure of this vacuum valve is shown in Figures 7, 8 and 9.
As shown in the figure, the openings at both ends of the insulating cylinder 1 are connected to the end plates 2 and 3.
A vacuum container 4 is formed by closing the vacuum container 4, and a pair of electrodes 5 and 6 which can be freely moved toward and away from the vacuum container 4 is disposed inside the vacuum container 4. A movable energizing shaft 8 of the electrode 6 is movably attached to the end plate 3 via a bellows 9, an arc shield 10 surrounding the electrodes 5 and 6 is attached to the insulating cylinder 1, and a bellows cover 11
is attached to the current-carrying shaft 8.
また、電極5,6の構造は、対向する接触面がAg −
VC系焼結材から形成され接点を兼ねた電極体14、1
5の裏面に、通電部16a、 L7aにより電気的に接
続されたコイル電極16.17が設けられている。Further, the structure of the electrodes 5 and 6 is such that the opposing contact surfaces are Ag −
Electrode body 14, 1 formed from VC-based sintered material and serving as a contact point
Coil electrodes 16 and 17 are provided on the back surface of the coil electrode 5 and are electrically connected through the current-carrying portions 16a and L7a.
このコイル電極16.17には、固定および可動通電軸
7,8からの電流がコイル分流腕部16b、 17bに
より分流され、コイル円弧部16c、 17cに流れる
。Current from the fixed and movable energizing shafts 7, 8 is shunted into the coil electrodes 16, 17 by the coil shunt arms 16b, 17b, and flows into the coil arc parts 16c, 17c.
このコイル円弧部16c、 17cに流れる電流により
、電極間空間に軸方向磁界が発生する。この軸方向磁界
は、接点間に点弧したアークを一様に拡散させ、接点の
損傷を軽微にするため、平板電極やスパイラル電極より
も大電流を遮断することが可能であった。しかも、低サ
ージ接点材Ag −VCを接点12、13に用いている
ため、さい断電流をIA以下に押えることのできる低サ
ージ性能をも併わせ有していた。The current flowing through the coil arc portions 16c and 17c generates an axial magnetic field in the interelectrode space. This axial magnetic field uniformly spreads the arc ignited between the contacts, minimizing damage to the contacts, making it possible to interrupt larger currents than with flat plate electrodes or spiral electrodes. Furthermore, since the low-surge contact material Ag-VC was used for the contacts 12 and 13, it also had low-surge performance that could suppress the cutting current to below IA.
(発明が解決しようとする問題点)
しかしながら、Ag−w(1,のような低サージ接点材
料は、一般に熱伝導率が小さく、かつwCの微粉末の焼
結材であるため、脆<CuやCu−Crに比べて熱的衝
撃に弱く、遮断限界電流が比較的小さい、このため、低
サージ性能と大電流遮断性能を併わせ有する電極構造と
はなりえなかった。(Problems to be Solved by the Invention) However, low-surge contact materials such as Ag-w(1) generally have low thermal conductivity and are sintered materials of fine powder of wC. It is weaker against thermal shock than copper or Cu-Cr, and has a relatively small breaking current. Therefore, it has not been possible to obtain an electrode structure that has both low surge performance and large current breaking performance.
本発明の目的は、上記事情に鑑みてなされたもので、低
さい断電流特性を有して低サージ性能に優れ、かつ大電
流遮断性能に優れた真空バルブを提供することを目的と
する。The object of the present invention was made in view of the above circumstances, and it is an object of the present invention to provide a vacuum valve having low breaking current characteristics, excellent low surge performance, and excellent large current breaking performance.
(問題を解決するための手段および作用)本発明は、絶
縁円筒の両端開口部をそれぞれ端板で閉止して形成した
真空容器の内部に、電極体および軸方向磁界を発生する
コイル電極を有する一対の電極を接離自在に配設した真
空バルブにおいて、電極体の表面に円形凹部を設けてC
u−Cr材から形成した電極面板を固着し、低サージ接
点材で形成した接点をこの電極面板に1〜3nn+突出
するように設け、さらに接点とコイル電極の配置関係を
、コイル電極の発生する軸方向磁界が電極面板上の強度
よりも接点上の強度の方が弱くなるように、コイル電極
のコイル円弧部による円周方向成分が接点の裏面および
その裏面の半径方向外側には形成されないような構成と
するかまたは接点と電極面板の配置関係を、一対の電極
が接触するときに一方の電極の接点が他方の電極の電極
面板に接触する構成とし、低さい断電流特性を有して低
サージとなり、かつ大電流遮断を可能としたものである
。(Means and effects for solving the problem) The present invention has an electrode body and a coil electrode that generates an axial magnetic field inside a vacuum container formed by closing both end openings of an insulating cylinder with end plates. In a vacuum valve in which a pair of electrodes are arranged so as to be able to come into contact with and separate from them, a circular recess is provided on the surface of the electrode body.
An electrode face plate made of a u-Cr material is fixed, a contact made of a low-surge contact material is provided on this electrode face plate so as to protrude by 1 to 3 nn+, and the arrangement relationship between the contact and the coil electrode is adjusted so that the coil electrode generates In order to ensure that the axial magnetic field is weaker on the contact point than on the electrode face plate, a circumferential component due to the coil arc portion of the coil electrode is not formed on the back surface of the contact point and on the radial outside of that back surface. or the arrangement of the contacts and the electrode face plate is such that when a pair of electrodes come into contact, the contact of one electrode contacts the electrode face plate of the other electrode, and has low breaking current characteristics. It has low surge and is capable of interrupting large currents.
(実施例)
以下、本発明の実施例を図面を参照して説明する。なお
、この実施例では、概略構成は従来と同じであり、可動
側電極、固定側電極とも構造が同じであるため、可動側
電極について説明し、固定側電極の説明は省略する。第
1図は本発明の真空バルブの可動側電極の平面図、第2
図は第1図のA−0−AMに沿って切断し矢印方向に見
た断面図である1両回において、可動側電極20は、可
動通電軸21の端部に一端を固着され、軸方向磁界(縦
磁界)を発生するコイル電極22と、このコイル電極2
2の他端に固着され、Cu材から形成された表面(固定
側f!i極と対向する面)に円形凹部を設けた電極体2
3と、この電極体23の円形凹部にロー付は等で固着さ
れ、電極体23の表面と等しいかもしくはそれよりも僅
かに突出し、Cu−Cr材から形成された電極面板24
と、この電極面板24に固着され、Ag −VCを主成
分とし添加物として総重量の10wt%以下のGo、
Ti、 Ss、 Bi、 To、 Bなどを含有させた
Ag −VC系接点材から半径5〜10mmの円形に形
成され、電極面板24より1〜3+m突出するようにし
た接点25から構成されている。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In this embodiment, the general configuration is the same as the conventional one, and both the movable side electrode and the fixed side electrode have the same structure. Therefore, the movable side electrode will be explained, and the explanation of the fixed side electrode will be omitted. Figure 1 is a plan view of the movable side electrode of the vacuum valve of the present invention;
The figure is a cross-sectional view taken along A-0-AM in FIG. 1 and viewed in the direction of the arrow. A coil electrode 22 that generates a directional magnetic field (longitudinal magnetic field), and this coil electrode 2
An electrode body 2 is fixed to the other end of 2 and has a circular recess on its surface (the surface facing the fixed side f!i pole) formed from a Cu material.
3, and an electrode face plate 24 which is fixed to the circular recess of the electrode body 23 by brazing or the like, protrudes at the same level as the surface of the electrode body 23 or slightly more than that, and is made of a Cu-Cr material.
Go, which is fixed to this electrode face plate 24 and whose main component is Ag-VC and which is less than 10 wt% of the total weight as an additive,
It consists of a contact 25 made of Ag-VC contact material containing Ti, Ss, Bi, To, B, etc. in a circular shape with a radius of 5 to 10 mm and protruding from the electrode face plate 24 by 1 to 3+ m. .
しかして、コイル電極22は、可動通電軸21にロー付
けなどにより一体的に固着されるコイル取り付は部22
dと、 これに連結されて半径方向に伸び、通電軸に流
れる電流を半径方向に変換するための複数個のコイル分
流腕部22cと、 このコイル分流腕部の先端に一端が
それぞれ連結されて円周方向に伸び、それに電流が流れ
た時電極間空間に軸方向磁界が発生されるようなコイル
円弧部22bと、さらにこのコイル円弧部22bの他端
に電極体22に連結するためのコイル連結部22aを有
している。Therefore, the coil electrode 22 is integrally fixed to the movable current-carrying shaft 21 by brazing or the like.
d, a plurality of coil shunt arms 22c connected thereto and extending in the radial direction for converting the current flowing through the current-carrying shaft in the radial direction; and one end connected to the tip of each of the coil shunt arms 22c. A coil arc portion 22b that extends in the circumferential direction and generates an axial magnetic field in the space between the electrodes when a current flows through it, and a coil that is connected to the electrode body 22 at the other end of the coil arc portion 22b. It has a connecting portion 22a.
このコイル電極22のコイル連結部22aが電極体23
の裏面に固着して連結されている。この場合、コイル電
極22の外径は電極体23の外径と等しいかもしくは小
さくなるようにする。また、接点25は、第1図に示す
平面内における位置を、コイル分流腕部22cのコイル
円弧部22bが連結されていない側面22eに接するか
もしくは僅かに離れ、電極体23の半径の1/2以上外
側でかつ電極面板24がらははみ出さないようにし、し
かも複数のものが電極体23と同心円上に配置されるよ
うにする。この接点25の最寄りのコイル分流腕部22
cと反対側に接点25と僅かに離れて半径方向に直線状
に伸びるスリット26が、電極体23および電極面板2
4に設けられる。上記のコイル連結部22aはこのスリ
ット26の接点25と反対側の裏面に固着され、電極体
23とコイル電極22を接続している。可動電極が固定
側電極側に移動して両電極が接触したとき、互いの接点
同士が接触点を有するように両電極を配置する。The coil connecting portion 22a of this coil electrode 22 is connected to the electrode body 23.
It is fixed and connected to the back side of. In this case, the outer diameter of the coil electrode 22 is made equal to or smaller than the outer diameter of the electrode body 23. Further, the contact point 25 has a position in the plane shown in FIG. Two or more electrode face plates 24 are arranged on the outside so that they do not protrude, and moreover, a plurality of electrodes are arranged concentrically with the electrode body 23. The coil shunt arm 22 closest to this contact 25
A slit 26 extending linearly in the radial direction at a slight distance from the contact point 25 on the opposite side of the electrode body 23 and the electrode face plate 2
4. The coil connecting portion 22a is fixed to the back surface of the slit 26 on the opposite side from the contact 25, and connects the electrode body 23 and the coil electrode 22. When the movable electrode moves toward the fixed electrode and the two electrodes come into contact, the two electrodes are arranged so that their contact points have contact points with each other.
なお、必要に応じ電極体23の裏面とコイル電極22の
間には、ステンレス鋼材のような低導電材料からなる補
強部材(図示しない)を固着し、変形を防止する。Note that, if necessary, a reinforcing member (not shown) made of a low conductive material such as stainless steel is fixed between the back surface of the electrode body 23 and the coil electrode 22 to prevent deformation.
次に1以上のように構成された本発明の真空バルブの電
極の作用について説明する。短絡事故や地絡事故が発生
して、真空バルブに定格遮断電流が流れ図示しない操作
機構部により可動側電極が固定側電極より離反されると
、陰極となった電極の接点材25上にカソードスポット
が点弧され、これらにより生成される金属蒸気プラズマ
により電極間空間にアークが維持される。この時、両電
極のコイル電極22のコイル円弧部22bに流れる電流
により、電極間空間に軸方向磁界が発生する。ただし、
両電極の接点25の裏面付近にはコイル円弧部22bが
存在せず、コイル連結部22aからの電流の経路は電極
体23及び電極面板24に設けられたスリット26を迂
回して接点25に到達するため、両電極の接点25近辺
に流れる電流は円周方向成分を持たず、すなわち接点2
5及びその近辺での軸方向磁界の強度はそのSUに比ら
べ弱くなる。軸方向磁界の強度の弱い電極上で点弧した
アークは、アーク電流瞬時値が大きくなると、第3図に
示すようにアーク電圧が大きくなり不安定となって接点
25上だけでアークが点弧することができなくなり、そ
の周囲のCu−Cr材からなる電極面板24上にもカソ
ードスポットが部分的に移動する。電極面板24上にア
ークが点弧すると、そこでの軸方向磁界強度は充分に強
く第3図の最小値付近のアーク電圧となり、アーク電圧
が充分低くアークが安定化される。この時、電極間電圧
の平衡を保つためアーク電圧の低い部分での電流分担が
増え、アークのほとんどが電極面板24上に移動し、接
点25での大電流アークを維持するための接点消耗が減
少し接点損傷が軽減される。周知のように、Cu −C
r材は大電流遮断性能を有し高耐電圧接点材料であるた
め、縦磁界電極と組合わせることにより、さらに遮断性
能が向上するので、本発明の電極構造では低サージ接点
材の損傷軽減効果と併わせで、大容量遮断性能を有する
電極構造となる。Next, the operation of the electrodes of the vacuum valve of the present invention configured as described above will be explained. When a short circuit or ground fault occurs and the rated breaking current flows through the vacuum valve and the movable electrode is separated from the stationary electrode by an operating mechanism (not shown), the cathode is placed on the contact material 25 of the electrode that has become the cathode. The spots are ignited and the metal vapor plasma they produce maintains an arc in the interelectrode space. At this time, an axial magnetic field is generated in the space between the electrodes due to the current flowing through the coil arc portions 22b of the coil electrodes 22 of both electrodes. however,
There is no coil arc portion 22b near the back surface of the contact point 25 of both electrodes, and the current path from the coil connecting portion 22a bypasses the slit 26 provided in the electrode body 23 and the electrode face plate 24 to reach the contact point 25. Therefore, the current flowing near the contact point 25 of both electrodes does not have a circumferential component, that is, the current flowing near the contact point 25 of both electrodes has no circumferential component.
The strength of the axial magnetic field at and around SU 5 is weaker than that at SU. For an arc ignited on an electrode with a weak axial magnetic field, when the instantaneous value of the arc current increases, the arc voltage increases and becomes unstable, as shown in Figure 3, and the arc is ignited only on the contact point 25. As a result, the cathode spot partially moves onto the surrounding electrode face plate 24 made of Cu-Cr material. When an arc is ignited on the electrode face plate 24, the axial magnetic field strength there is sufficiently strong to produce an arc voltage near the minimum value in FIG. 3, and the arc voltage is sufficiently low to stabilize the arc. At this time, in order to keep the voltage between the electrodes balanced, the current share increases in the area where the arc voltage is low, and most of the arc moves onto the electrode face plate 24, reducing contact wear to maintain the large current arc at the contact 25. contact damage is reduced. As is well known, Cu-C
Since the R material has large current interrupting performance and is a high withstand voltage contact material, the interrupting performance is further improved by combining it with a vertical magnetic field electrode, so the electrode structure of the present invention has a damage reduction effect of low surge contact material. In combination with this, it becomes an electrode structure with high capacity breaking performance.
定常負荷電流のようなノ]1電流の遮断の場合には、電
極間空間全体での軸方向磁界強度が弱く、接点25上と
電極面板24上でのアーク電圧差も小さく、また接点2
5間で接触点を有しているため、電流零点で負荷電流を
遮断するまでアークは主に接点上で点弧する。ここで、
接点25にはAg−VCもしくは少量のSe、 Bi、
B、 Teなどの低融点材を含有したAg −VCを
主成分とした金属材料を用いているため、平均さい断電
流が約0.8アンペア以下と低さい断時性を示し、低サ
ージ真空バルブを実現することが可能な電極構造となる
。In the case of interrupting a current such as a steady load current, the axial magnetic field strength in the entire interelectrode space is weak, the arc voltage difference between the contact 25 and the electrode face plate 24 is small, and the contact 2
Since the contact point is between 5 and 5, the arc is ignited mainly on the contact point until the load current is cut off at the current zero point. here,
The contact 25 contains Ag-VC or a small amount of Se, Bi,
Since it uses a metal material whose main component is Ag-VC containing low melting point materials such as B and Te, it exhibits low interruption performance with an average cutting current of approximately 0.8 amperes or less, and has low surge vacuum resistance. This results in an electrode structure that makes it possible to realize a valve.
上記接点25に10vt%以下のCOもしくはTiを含
有することにより、接点25の金属組織内のwc化合物
の微粒子間結合力を強化することになり、接点のアーク
による損傷を抑制し、大電流遮断に有利である。By containing 10vt% or less of CO or Ti in the contact 25, the bonding force between fine particles of the wc compound in the metal structure of the contact 25 is strengthened, suppressing arc damage to the contact and interrupting large currents. advantageous to
このようにして構成した電極に電流エージングを施すこ
とにより、電極の対向表面にAg、 Cu、 Crの微
粒子の薄膜層を形成させ、溶着引きはずし力の低下、高
耐圧化などの効果を得ることが可能である。By subjecting the electrodes constructed in this way to current aging, a thin film layer of fine particles of Ag, Cu, and Cr is formed on the opposing surfaces of the electrodes, resulting in effects such as lowering the welding pull-off force and increasing withstand voltage. is possible.
以上の構成によればCu−Cr材、軸方向磁界とその強
弱分布およびAg −VCを主成分とする接点の間に接
触点を有する効果により、大電流遮断時にはCu−Cr
材からなる電極面板上での電流分担を多くし、Ag−V
C接点の大電流遮断による損傷を非常に軽微にすること
が可能であり、かつ小電流時にはAg−νC接点上にア
ークを点弧させることが可能のため、遮断性能を向上さ
せると共に平均さい断電流0.8A以下の低サージ性能
を有する真空バルブを提供することが可能となる。According to the above configuration, due to the effect of having a contact point between the Cu-Cr material, the axial magnetic field and its strength distribution, and the contact whose main component is Ag-VC, the Cu-Cr
By increasing the current sharing on the electrode face plate made of Ag-V
It is possible to minimize damage caused by large current interruption to the C contact, and it is also possible to ignite an arc on the Ag-νC contact when the current is small, improving the interruption performance and reducing the average rupture. It becomes possible to provide a vacuum valve having low surge performance with a current of 0.8 A or less.
なお、本発明は、上述した実施例に限定されるものでは
なく、接点25の材料をAgまたはCuをベースとした
高蒸気圧、低融点材料を含む合金からなる低サージ材料
を用い、かつ周囲の電極面板24をCu−Cr材で形成
した縦磁界電極においても同様な効果を発揮し、遮断性
能が向上した低サージ性能を有する真空バルブを提供す
ることができる。また、接点と電極面板で接触点を有す
るように構成してもよい、すなわち、第4図および第5
図において、可動側電極30は、可動通電軸31の端部
に一端を固着され、軸方向磁界を発生する単数または複
数のコイル電極32と、このコイル電極32の他端に固
着され、Cu材から形成されて裏面(固定電極と対向す
る面)側に円形凹部を設けた電極体33と。Note that the present invention is not limited to the above-described embodiments, and the contact 25 is made of a low-surge material made of an alloy containing a high vapor pressure, low melting point material based on Ag or Cu, and Similar effects can be achieved in a vertical magnetic field electrode in which the electrode face plate 24 is made of a Cu-Cr material, and a vacuum valve with improved cutoff performance and low surge performance can be provided. It may also be configured to have a contact point between the contact point and the electrode face plate, i.e., as shown in FIGS. 4 and 5.
In the figure, the movable side electrode 30 has one end fixed to the end of the movable current-carrying shaft 31, one or more coil electrodes 32 that generate an axial magnetic field, and the other end of the coil electrode 32 fixed to the coil electrode 32, which is made of Cu material. An electrode body 33 is formed from a metal material and has a circular recess on the back surface (the surface facing the fixed electrode).
この電極体33の円形凹部にロー付は等で固着され。The electrode body 33 is fixed to the circular concave portion with a brazing rod or the like.
電極体33の表面と等しいかもしくはそれよりも僅かに
突出し、Cu −Cr材から形成された電極面板34と
、この電極面板34に固着され、Ag−VCを主成分と
し添加物として総重量の10wt%以下のGo、 Ti
。The electrode face plate 34 is made of a Cu-Cr material and protrudes from the surface of the electrode body 33 at the same level or slightly more than the surface of the electrode body 33. Go, Ti below 10wt%
.
Se、 Bi、 Te、 Bなどを含有させたAg −
VC系接点材から半径5〜10m+の円形に形成され、
電極面板34より1〜3Im突出するようにした接点3
5がら構成されている。ここで、コイル電極32は、可
動通電軸31とは半径方向に直線状に伸びるコイルつな
ぎ部32aを介し、電極体33とはコイル円弧部32b
の端部に設けられたコイル通電部32cを介してそれぞ
れ電気的に接続されるよう構成され、その外径は@掻体
33の外径と略同じにしている。また、接点35は、電
極体33の半径をRとしたとき、中心からR/2以上外
側の位置に3〜4個等配して設けている。Ag containing Se, Bi, Te, B, etc.
Formed into a circle with a radius of 5 to 10 m+ from VC type contact material,
Contact 3 protrudes 1 to 3 Im from the electrode face plate 34
It consists of 5 parts. Here, the coil electrode 32 is connected to the movable energizing shaft 31 via a coil connecting portion 32a extending linearly in the radial direction, and connected to the electrode body 33 via a coil arc portion 32b.
They are configured to be electrically connected to each other via coil current-carrying portions 32c provided at the ends of the coils, and the outer diameter thereof is approximately the same as the outer diameter of the scraping body 33. Further, when the radius of the electrode body 33 is R, three to four contacts 35 are equally spaced and provided at positions R/2 or more outward from the center.
一方、固定側電極40も上記した可動側電極30と同じ
構成で、第5図に一点鎖線で示すように固定通電軸41
の端部に一端を固着された単数または複数のコイル電極
32と、このコイル電極32の他端に固着された電極体
33と、この電極体33の円形凹部に固着された電極面
板34と、この電極面板34に固着され、電極体33の
半径をRとしたときに中心からR/2以上外側の位置に
3〜4個等配し、半径5〜10mmの円形で電極面板3
4から1〜3m突出して設けた接点35から構成されて
いる。On the other hand, the fixed side electrode 40 also has the same configuration as the above-mentioned movable side electrode 30, and as shown by the dashed line in FIG.
a single or plural coil electrodes 32 having one end fixed to the end of the coil electrode 32; an electrode body 33 fixed to the other end of the coil electrode 32; an electrode face plate 34 fixed to a circular recess of the electrode body 33; The electrode face plate 34 is fixed to the electrode face plate 34, and when the radius of the electrode body 33 is R, 3 to 4 pieces are equally spaced at positions outside R/2 or more from the center.
The contact point 35 is provided to protrude 1 to 3 m from the contact point 4.
しかして、可動側電極30と固定側電極40が真空容器
内に対向して配設されたときのそれぞれの接点35の位
置関係は、第5図および第6図に示すように可動側電極
30の接点35が実線で示す位置にあるのに対し、固定
側電極40の接点35は一点鎖線で示す位置となるよう
に互にずらした位置とする。Therefore, when the movable side electrode 30 and the fixed side electrode 40 are disposed facing each other in the vacuum container, the positional relationship of the respective contacts 35 is as shown in FIGS. 5 and 6. The contacts 35 of the fixed electrode 40 are located at the positions shown by solid lines, while the contacts 35 of the fixed electrode 40 are located at positions shifted from each other so that they are located at the positions shown by dashed lines.
したがって、図示しない操作機構部により可動側電極3
0が固定側電極40に向って投入されたとき、互いのA
g −VCを主成分として半径5〜10nwsの他より
1〜3m突出して設けられた接点35.35同士が接触
せず、Ag−WCを主成分とした接点35とCu−Cr
からなる電極面板34とが接触点を有するような電極配
置となる。なお、この場合にも接点35は、Ag−WC
を主成分とし、添加物として総重量の10νt%以下の
Co、 Ti、 Se、 Bi、 Ten Bなどを含
有させたAg −VC系接点材を用いる。電極体33と
電極面板34には半径方向に直線状に伸びる複数のスリ
ット36が設けられている。また、電極体33の裏面に
はステンレス鋼材のような導電率の低い材料からなる補
強材37がコイル電極32との間に固着されている。Therefore, the movable side electrode 3 is
0 is injected toward the fixed side electrode 40, each other's A
g-Contacts 35 with VC as the main component and protruding 1 to 3 m from the others with a radius of 5 to 10 nws do not contact each other, and the contacts 35 with Ag-WC as the main component and Cu-Cr
The electrodes are arranged such that the electrode face plate 34 has a contact point. In addition, in this case as well, the contact 35 is made of Ag-WC.
An Ag-VC type contact material is used which contains Co, Ti, Se, Bi, Ten B, etc. as a main component and 10vt% or less of the total weight as additives. The electrode body 33 and the electrode face plate 34 are provided with a plurality of slits 36 extending linearly in the radial direction. Further, on the back surface of the electrode body 33, a reinforcing material 37 made of a material with low conductivity such as stainless steel is fixed between the reinforcing material 37 and the coil electrode 32.
以上のような構成の電極において、定格通′11電流数
千アンペア以下の電流を遮断するために、図示しない操
作機構部により可動側電極30が固定側電極40から離
反されると、互いのAg−VCを主成分とした接点35
とCu −Crからなる電極面板34とで接触点を有し
ていたため、陰極となった電極の接点35と電極面板3
4の両面上にカソードスポットが点弧され、これらによ
り生成される金属蒸気プラズマにより電流零点近傍まで
アークが維持される。In the electrode configured as described above, when the movable side electrode 30 is separated from the fixed side electrode 40 by an operation mechanism (not shown) in order to cut off a current with a rated current of several thousand amperes or less, mutual Ag - Contact 35 whose main component is VC
Since there was a contact point between the electrode face plate 34 made of Cu-Cr, the contact point 35 of the electrode which became a cathode and the electrode face plate 3
Cathode spots are ignited on both sides of 4, and the metal vapor plasma generated by these spots maintains the arc up to near the current zero point.
ここで、さい断電流値は、カソードスポットが点呼した
金属材料によって決まり、Cu −Crが約3.5アン
ペア、これに対しSe、 Bi、 Te、 Bなどの低
融点材を含有したAg −VCを主成分とした金属材料
では約0.8アンペア以下と低さい断電流特性を示す。Here, the cutting current value is determined by the metal material used for the cathode spot, and Cu-Cr is approximately 3.5 amperes, whereas Ag-VC containing low melting point materials such as Se, Bi, Te, and B is approximately 3.5 amperes. A metal material containing as a main component exhibits a low breaking current characteristic of about 0.8 ampere or less.
したがって、陰極となった電極の接点35と電極面板3
4の両面上に点弧されたカソードスポットのうち、Ss
、 B、L、 Tet Bなどの低融点材を含有したA
g−WCを主成分とした接点35上に点弧したものが、
より電流零点付近まで維持されるため、このような電極
構造とすることにより低さい断電流特性を有し、低サー
ジ用真空バルブを実現することが可能である。また相間
短絡や地絡事故などが発生し敵方アンペアの定格遮断電
流を遮断するため、図示しない操作機構部により可動側
電極30が固定側電極40から離反されると、互いのA
IC−VCを主成分とした接点35とCu−Crからな
る電極面板34とで接触点を有していたため、陰極とな
った電極の接点35と電極面板34の両面上にカソード
スポットが点弧され、これらにより生成される金属蒸気
プラズマにより電流零点近傍までアークが維持される。Therefore, the contact point 35 of the electrode that has become a cathode and the electrode face plate 3
Among the cathode spots fired on both sides of 4, Ss
, B, L, A containing low melting point materials such as Tet B
The one ignited on the contact 35 whose main component is g-WC is
Since the current is maintained close to the zero point, it is possible to realize a low surge vacuum valve with a low breaking current characteristic by using such an electrode structure. In addition, if a phase-to-phase short circuit or a ground fault occurs and the rated breaking current of the opposing ampere is cut off, if the movable electrode 30 is separated from the fixed electrode 40 by an operation mechanism (not shown), the mutual A
Since there was a contact point between the contact point 35 mainly composed of IC-VC and the electrode face plate 34 made of Cu-Cr, a cathode spot was ignited on both sides of the electrode contact point 35 which became a cathode and the electrode face plate 34. The metal vapor plasma generated by these maintains the arc up to near the current zero point.
さらに、コイル電極32を有する縦磁界電極と組合わせ
ることにより、アークは電極間領域に比較的大電流値で
も拡散していることが知られており、加えて互いのAg
−VCを主成分とした接点35とCu −Crからな
る電極面板34とで接触点を有する構造のため、陽極と
なる電極の接点35での溶融による損傷が軽微になる。Furthermore, it is known that by combining a longitudinal magnetic field electrode with a coil electrode 32, the arc can be diffused in the interelectrode region even at a relatively large current value.
Since the structure has a contact point between the contact point 35 mainly composed of -VC and the electrode face plate 34 made of Cu-Cr, damage caused by melting at the contact point 35 of the electrode serving as the anode is slight.
その上、熱伝導率が小さくカソードスポットがへg−W
C接点上に集中しやす<Ag−WC接点上ではllIC
粒子の飛散により陰極損傷がはげしいが、10wt%以
下のCOあるいはTiを含有し曾Cに固溶させることに
よりすC粒子間の結合を強化し。Moreover, the thermal conductivity is small and the cathode spot is weak.
It is easy to concentrate on the C contact < llIC on the Ag-WC contact
Although cathode damage is severe due to scattering of particles, the bond between carbon particles is strengthened by containing 10 wt% or less of CO or Ti and dissolving it in solid carbon.
陰極損傷を軽減させることができる。これらの効果を併
わせ持つこの電極構造により、低サージでかつ大電流遮
断が可能な真空バルブを提供することが可能である。Cathode damage can be reduced. With this electrode structure having both of these effects, it is possible to provide a vacuum valve that has low surge and is capable of interrupting large currents.
電極体33および電極面板34に設けた半径方向に伸び
る複数の直線状のスリットにより、電極体33に流れる
渦電流を防止し、軸方向磁界を有効に発生させることが
できる。The plurality of linear slits extending in the radial direction provided in the electrode body 33 and the electrode face plate 34 can prevent eddy currents flowing through the electrode body 33 and effectively generate an axial magnetic field.
電極体33の対向裏面とコイル電極32の間に固着され
たステンレス鋼材などの低導電率材料からなる補強材3
6により真空バルブの開閉@1作時の電極体33および
コイル電極32の変形を防ぐことができる。A reinforcing material 3 made of a low conductivity material such as stainless steel is fixed between the opposing back surface of the electrode body 33 and the coil electrode 32.
6 can prevent deformation of the electrode body 33 and coil electrode 32 when the vacuum valve is opened and closed @1.
このようにして構成した電極に電流エージングを施すこ
とにより、電極体33の対向表面にAg、 Cu。By subjecting the electrode constructed in this manner to current aging, Ag and Cu are formed on the opposing surfaces of the electrode body 33.
Crの微粒子の薄膜層を形成させ、溶着引きはずしの低
下、高耐圧化などの効果を得ることが可能である。By forming a thin film layer of fine Cr particles, it is possible to obtain effects such as a reduction in welding and tripping, and an increase in pressure resistance.
この実施例によれば、軸方向磁界およびCu −Cr電
極面板とAg−1c接点の間に接触点を有する効果で、
大電流g断時にはCu−Cr電極面板上での電流分担を
多くシ、へg−vc接点の大電流遮断による損傷を非常
に軽微にすることが可能であり、かつ小電流時にはAR
−VC上にアークを点弧させることが可能なため、遮断
性能を向上させ、かっさい断電流0.8A以下の低サー
ジ性能を有する真空バルブを提供することが可能である
。According to this example, the effect of having an axial magnetic field and a contact point between the Cu-Cr electrode face plate and the Ag-1c contact,
When a large current g is cut off, the current is shared more on the Cu-Cr electrode face plate, making it possible to minimize the damage caused by the large current cutoff of the g-vc contact, and when the current is small, the AR
- Since it is possible to ignite an arc on the VC, it is possible to improve the breaking performance and provide a vacuum valve having low surge performance with a breaking current of 0.8 A or less.
さらに、接点35の材料を篩またはCuをベースとした
高蒸気圧、低融点材料を含む合金からなる低サージ材を
用い、かつ周囲の電極面板34をCu−Cr材から形成
した縦磁界電極においても同様な効果を発揮し遮断性能
が向上された低サージ性能を有する真空バルブを提供す
ることが可能である。Furthermore, in a vertical magnetic field electrode, the contact 35 is made of a low-surge material made of a sieve or a Cu-based alloy containing a high vapor pressure, low melting point material, and the surrounding electrode face plate 34 is made of a Cu-Cr material. It is also possible to provide a vacuum valve that exhibits similar effects and has improved shutoff performance and low surge performance.
本発明は、以上のように構成されているから、低サージ
接点材と遮断性能の良好なCu−Crを併せ持ち、低サ
ージ接点とCu −Cr材の間で接触点を有しかつ縦磁
界電極により構成されているので、低サージ性能と大電
流遮断時のCu−Cr上へアーク拡散効果により、低サ
ージ、大遮断容量の真空バルブを提供することができる
。Since the present invention is configured as described above, it has both a low-surge contact material and Cu-Cr having good breaking performance, has a contact point between the low-surge contact and the Cu-Cr material, and has a vertical magnetic field electrode. Since the vacuum valve has a low surge performance and an arc diffusion effect on Cu-Cr during large current interruption, it is possible to provide a vacuum valve with low surge and large interruption capacity.
第1図は本発明の真空バルブの電極構造の一実施例を示
す平面図、第2図は第1図のA−〇−A線に沿って切断
し矢印方向に見た断面図、第3図は本発明に関連するC
u−Cr材とAg −WC材の軸方向磁束密度とアーク
電圧との関係を示す線図、第4図は本発明の他の実施例
の電極構造を一部切断して示す平面図、第5図は第4図
のA−○−A線に沿って切断し矢印方向に見た断面図、
第6図は本発明の他の実施例の電極の配置関係を示す説
明図、第7図は従来の真空バルブの構造を示す断面図、
第8図は従来の真空バルブの電極構造を一部切断して示
す平面図、第9図は第8図のA−0−AAliに沿って
切断し矢印方向に見た断面図である。
4・・・真空容器、 21・・・可動通電軸22・
・・コイル電極、 23・・・電極体24・・・電極
面板、 25・・・接点26・・・スリット
(8733)代理人弁理士 猪 股 祥 晃(ほか1名
)第 1rsn
第 2 図
第 3 図
茅 4I!1
第 6 ω汀
第 7 図FIG. 1 is a plan view showing one embodiment of the electrode structure of the vacuum valve of the present invention, FIG. 2 is a sectional view taken along line A--A in FIG. The figure shows C related to the present invention.
Fig. 4 is a diagram showing the relationship between the axial magnetic flux density and arc voltage of u-Cr material and Ag-WC material; Fig. 4 is a partially cutaway plan view showing the electrode structure of another embodiment of the present invention; Figure 5 is a cross-sectional view taken along line A-○-A in Figure 4 and viewed in the direction of the arrow;
FIG. 6 is an explanatory diagram showing the arrangement of electrodes in another embodiment of the present invention, and FIG. 7 is a sectional view showing the structure of a conventional vacuum valve.
FIG. 8 is a partially cutaway plan view showing the electrode structure of a conventional vacuum valve, and FIG. 9 is a cross-sectional view taken along A-0-AAli in FIG. 8 and viewed in the direction of the arrow. 4... Vacuum container, 21... Movable current-carrying shaft 22.
...Coil electrode, 23...Electrode body 24...Electrode face plate, 25...Contact 26...Slit (8733) Representative patent attorney Yoshiaki Inomata (and 1 other person) 1st rsn Figure 2 3 Illustration 4I! 1 6th ω 7th figure
Claims (8)
形成した真空容器の内部に、電極体および軸方向磁界を
発生するコイル電極を有する一対の電極を接離自在に配
設した真空バルブにおいて、前記電極体の表面に円形凹
部を設けてCu−Cr材から形成した電極面板を固着し
、低サージ接点材で円板状に形成した接点をこの電極面
板に1〜3mm突出するように設けたことを特徴とする
真空バルブ。(1) A vacuum in which a pair of electrodes having an electrode body and a coil electrode that generates an axial magnetic field is arranged so as to be able to be moved toward and away from the inside of a vacuum container formed by closing the openings at both ends of an insulating cylinder with end plates. In the bulb, a circular recess is provided on the surface of the electrode body to which an electrode face plate made of a Cu-Cr material is fixed, and a disc-shaped contact made of a low-surge contact material is made to protrude from the electrode face plate by 1 to 3 mm. A vacuum valve characterized by being provided with.
し、かつその低さい断電流特性を損なわない程度の重量
比で10wt%以下のCo、Ti、Se、Bi、Te、
Bなどを含有させた特許請求の範囲第1項記載の真空バ
ルブ。(2) The low-surge contact material contains sintered Ag-WC as the main component, and contains Co, Ti, Se, Bi, Te, etc. in a weight ratio of 10 wt% or less without impairing its low breaking current characteristics.
The vacuum valve according to claim 1, which contains B or the like.
心円上に配置すると共に、コイル電極の発生する軸方向
磁界が前記電極面板上の強度よりも前記接点上の強度の
方が弱くなるように、前記コイル電極のコイル円弧部に
よる電流の円周方向成分が前記接点の裏面およびその裏
面の半径方向外側には形成されないような前記コイル電
極と前記接点の配置構成とした特許請求の範囲第1項記
載の真空バルブ。(3) The contact points should not protrude beyond the electrode face plate and should be arranged at the center or on concentric circles, and the axial magnetic field generated by the coil electrode should have a weaker strength on the contact point than on the electrode face plate. Claim 1: The coil electrode and the contact are arranged such that the circumferential component of the current due to the coil arc portion of the coil electrode is not formed on the back surface of the contact and on the radially outer side of the back surface. Vacuum valve as described in section.
コイル腕部とコイル連結部の間に半径方向に伸びるスリ
ットを1個以上設けた特許請求の範囲第2項記載の真空
バルブ。(4) The vacuum valve according to claim 2, wherein the electrode face plate and the electrode body are provided with one or more slits extending in the radial direction between the coil arm portions of adjacent coil electrodes and the coil connecting portions.
心円上に配置すると共に、真空バルブが投入され可動側
電極が固定側電極に接触するとき、一方の電極の接点が
他方の電極の電極面板に接触して電気的に接続される接
点と前記電極面板の配置構成とした特許請求の範囲第1
項記載の真空バルブ。(5) The contacts should not protrude beyond the electrode face plate and should be placed in the center or on concentric circles, and when the vacuum valve is turned on and the movable electrode contacts the fixed electrode, the contact of one electrode will be placed on the electrode face plate of the other electrode. Claim 1 is characterized in that the contact point electrically connected to the contact point and the electrode face plate are arranged.
Vacuum valve as described in section.
るスリットを1個以上設けた特許請求の範囲第5項記載
の真空バルブ。(6) The vacuum valve according to claim 5, wherein the electrode face plate and the electrode body are provided with one or more slits extending linearly in the radial direction.
成した補強材を、電極体裏面とコイル電極間に設けた特
許請求の範囲第5項記載の真空バルブ。(7) The vacuum valve according to claim 5, wherein a ring-shaped reinforcing material made of a low conductivity material such as stainless steel is provided between the back surface of the electrode body and the coil electrode.
備えた真空バルブに、電流エージングを施した特許請求
の範囲第1項乃至第6項記載の真空バルブ。(8) The vacuum valve according to any one of claims 1 to 6, wherein the vacuum valve is provided with an electrode having a contact, an electrode face plate, and a coil electrode, and is subjected to current aging.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP323787A JPS63174232A (en) | 1987-01-12 | 1987-01-12 | Vacuum valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP323787A JPS63174232A (en) | 1987-01-12 | 1987-01-12 | Vacuum valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63174232A true JPS63174232A (en) | 1988-07-18 |
Family
ID=11551848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP323787A Pending JPS63174232A (en) | 1987-01-12 | 1987-01-12 | Vacuum valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63174232A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014099417A (en) * | 2007-06-05 | 2014-05-29 | Cooper Technologies Co | Vacuum interrupter |
-
1987
- 1987-01-12 JP JP323787A patent/JPS63174232A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014099417A (en) * | 2007-06-05 | 2014-05-29 | Cooper Technologies Co | Vacuum interrupter |
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