JPH0479090B2 - - Google Patents
Info
- Publication number
- JPH0479090B2 JPH0479090B2 JP3859884A JP3859884A JPH0479090B2 JP H0479090 B2 JPH0479090 B2 JP H0479090B2 JP 3859884 A JP3859884 A JP 3859884A JP 3859884 A JP3859884 A JP 3859884A JP H0479090 B2 JPH0479090 B2 JP H0479090B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- outer peripheral
- vacuum circuit
- contact portion
- circuit breaker
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims description 19
- 230000005291 magnetic effect Effects 0.000 claims description 15
- 239000011669 selenium Substances 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 12
- 229910052709 silver Inorganic materials 0.000 claims description 9
- 229910017052 cobalt Inorganic materials 0.000 claims description 6
- 239000010941 cobalt Substances 0.000 claims description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 6
- 229910052711 selenium Inorganic materials 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 229910052714 tellurium Inorganic materials 0.000 claims description 5
- 238000005219 brazing Methods 0.000 claims description 4
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 3
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 description 7
- 239000007772 electrode material Substances 0.000 description 7
- 239000006096 absorbing agent Substances 0.000 description 6
- 239000010949 copper Substances 0.000 description 3
- 101100537937 Caenorhabditis elegans arc-1 gene Proteins 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は主電極を改良した平行磁界型の真空遮
断器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a parallel magnetic field type vacuum circuit breaker with an improved main electrode.
配電系統で多く使われている真空遮断器は、消
弧性力が非常に強く、小電流遮断時に電流を突如
零に急変させる電流さい断現象があり、変圧器や
モータ回路では過大なサージ電圧を発生し易かつ
た。そのため、従来は、この過電圧から機器の絶
縁を保護するためにコンデンサやアレスター等の
サージアブソーバが併用されてきている。しか
し、サージアブソーバは真空遮断器の多きな利点
である小形性を損う。これに対処するため、サー
ジアブソーバを省略するには、電流さい断現象を
生ずる電流レベルを下げる必要がありこれは、電
極材料で決まる。
Vacuum circuit breakers, which are often used in power distribution systems, have a very strong arc-extinguishing force, and when a small current is cut off, there is a current cutting phenomenon in which the current suddenly changes to zero, and in transformers and motor circuits, excessive surge voltage can occur. was likely to occur. Therefore, conventionally, surge absorbers such as capacitors and arresters have been used in combination to protect the insulation of equipment from this overvoltage. However, surge absorbers detract from one of the many advantages of vacuum circuit breakers: compactness. To deal with this, to omit the surge absorber, it is necessary to lower the current level that causes the current interruption phenomenon, which is determined by the electrode material.
さい断電流レベルの小さい電極材料としては、
コバルト（Co）、銀（Ag）並びにセレン（Se）
等の複合材である。複合電極材料を平行磁界型の
主電極に使用すると、主電極は電極基板に無酸化
銅を、電極基板に隣接してCo，Ag，Seから成る
接触層を使用し、両者はろう付たとえばAgロー
付をして一体にする。しかし、Seが入つている
のでろう付け性が悪い。そのため、Co基板を接
触層のCo−Ag−Se材の製造時に焼結にて付けて
おき電極基板との間に配置したサンドイツチ状に
して、ろう付けをすることが考えられる。 Electrode materials with low cutting current levels include:
Cobalt (Co), silver (Ag) and selenium (Se)
It is a composite material such as When a composite electrode material is used for the parallel magnetic field type main electrode, the main electrode uses oxidized copper as the electrode substrate and a contact layer made of Co, Ag, and Se adjacent to the electrode substrate, and both are brazed, for example, with Ag. Solder to make it one piece. However, it has poor brazing properties because it contains Se. Therefore, it is conceivable to attach the Co substrate by sintering during the production of the Co-Ag-Se material for the contact layer, form a sandwich-like structure between the electrode substrate and the electrode substrate, and then perform brazing.
しかし、主電極にCo基板を使用すると、Co基
板は強磁性体であるため、磁気シールドとなつて
しまつて、電極間空間に有効な平行磁界を発生す
ることができない。 However, when a Co substrate is used for the main electrode, since the Co substrate is a ferromagnetic material, it becomes a magnetic shield and cannot generate an effective parallel magnetic field in the interelectrode space.
また、主電極中央の接点部の高さ寸法を外周部
のそれよりより高く構成し、更にさい断電流レベ
ルを改善した主電極では、Co，Ag、並びにSeか
らなる電極材料を接点部だけに限ると、Co，Ag
並びにSeからなる電極材料は、アーク電圧が約
12Vと、一般用真空遮断器用電極材料たとえば銅
（Cu）−ビスマス（Bi）を使用した外周部は、ア
ーク電圧17−20Vであるため、接点部からその外
周部の主電極表面へのアークの移転が出来ず、ア
ークは接点部だけに集中してしまい良好な遮断性
能を得ることができない。このようなところか
ら、従来、さい断電流の小さい大電流遮断用の真
空遮断器は不可能視されていた。 In addition, in the main electrode, the height of the contact part at the center of the main electrode is configured higher than that of the outer peripheral part, and the cutting current level is further improved. Limited, Co, Ag
Also, the electrode material made of Se has an arc voltage of approximately
12V and the outer periphery using electrode material for general vacuum circuit breakers, such as copper (Cu)-bismuth (Bi), has an arc voltage of 17-20V, so arcing from the contact part to the main electrode surface of the outer periphery is The arc cannot be transferred, and the arc is concentrated only at the contact point, making it impossible to obtain good interrupting performance. For these reasons, it has conventionally been considered impossible to create a vacuum circuit breaker for breaking large currents with a small breaking current.
本発明の目的は、さい断電流レベルが低くてサ
ージアブソーバを不要とでき、かつ25kA以上の
大電流遮断に好適な真空遮断器を提供することに
ある。
An object of the present invention is to provide a vacuum circuit breaker that has a low breaking current level, eliminates the need for a surge absorber, and is suitable for breaking large currents of 25 kA or more.
本発明の主電極は、中央部にコバルト、銀並び
にセレンより成る接点部と、接点部の周囲にコバ
ルト、銀並びにテルルより成る外周部と、から構
成することにより、上記目的を達成することにあ
る。
The main electrode of the present invention achieves the above object by comprising a contact part made of cobalt, silver, and selenium in the center, and an outer peripheral part made of cobalt, silver, and tellurium around the contact part. be.
以下、本発明の実施例を第１図に示す真空遮断
器１により説明する。
Hereinafter, an embodiment of the present invention will be explained using a vacuum circuit breaker 1 shown in FIG.
真空遮断器１は、絶縁円筒２並びに端板３，４
よりなる真空容器内に、導電棒６，７が端板３，
４を貫通して設けられ、一対の電極８，９が
夫々、真空容器内で導電棒６，７に固着されて構
成されている。一方の導電棒７はベローズ１０を
介して端板４に気密に封着されている。導電棒６
は端板３に直接取り付けられ気密に封着されてい
る。可動側および固定側電極８，９は、これらを
取り囲んで配置された円筒状の金属蒸気シールド
１１が、シールド支え１２によつて、絶縁円筒２
の中間部に取着されている。図示していない操作
機構により導電棒７が軸方向上側に駆動されるこ
とにより、可動側電極８は固定側電極９に接触
し、真空遮断器は閉路状態となり、導電棒７が軸
方向下側に駆動されることにより、固定側電極９
より可動側電極８が離れて真空遮断器は、閉路状
態へと移る。これらの電極８，９はコイル電極１
３、主電極１４とから構成されているが、両電極
の構造が同じなので、固定側電極８の説明を省略
し、可動側電極９について第２図により説明す
る。 The vacuum circuit breaker 1 includes an insulating cylinder 2 and end plates 3 and 4.
Conductive rods 6, 7 are placed in a vacuum container consisting of end plates 3,
4, and a pair of electrodes 8 and 9 are fixed to conductive rods 6 and 7, respectively, within a vacuum container. One conductive rod 7 is hermetically sealed to the end plate 4 via a bellows 10. Conductive rod 6
is directly attached to the end plate 3 and hermetically sealed. A cylindrical metal vapor shield 11 surrounding the movable and fixed electrodes 8 and 9 is connected to an insulating cylinder 2 by a shield support 12.
It is attached to the middle part of. When the conductive rod 7 is driven upward in the axial direction by an operation mechanism (not shown), the movable electrode 8 contacts the fixed electrode 9, the vacuum circuit breaker is closed, and the conductive rod 7 is moved downward in the axial direction. By being driven by the fixed side electrode 9
As the movable electrode 8 moves further away, the vacuum circuit breaker shifts to a closed circuit state. These electrodes 8 and 9 are the coil electrode 1
3 and a main electrode 14, but since the structures of both electrodes are the same, the explanation of the fixed side electrode 8 will be omitted, and the movable side electrode 9 will be explained with reference to FIG.
コイル電極１３は裏面に導電棒７を固着した中
心部１５に、中心部より外周方向に延びる腕部１
６を取付け、腕部１６より中心部１５を包囲する
ように円周方向に延び、かつ他端が間隙１７と対
応している外周部１８を、腕部１６に一体に形成
している。接続部１９は外周部他端に設けられ、
かつ主電極１４に電気的に接続している。 The coil electrode 13 has a center part 15 having a conductive rod 7 fixed to the back surface thereof, and an arm part 1 extending from the center part in the outer circumferential direction.
6 is attached to the arm 16, and an outer peripheral portion 18 that extends in the circumferential direction from the arm 16 so as to surround the center portion 15 and whose other end corresponds to the gap 17 is formed integrally with the arm 16. The connecting portion 19 is provided at the other end of the outer periphery,
And it is electrically connected to the main electrode 14.
主電極１４は外周側から中心側に向つて８本の
直線状のスリツト２０を形成している。スリツト
２０は導電棒７からの電流がコイル電極１３を流
れて、接続部１９を介して主電極１４のアーク１
００に流れと、コイル電極１３で平行磁界（図示
せず）を発生する。平行磁界が主電極１４を印加
すると、主電極１４にうず電が流れるが、スリツ
ト２０によりうず電流が小さくできる。このた
め、うず電流による磁界によつて、平行磁界が減
極されるのを少なくできる。 The main electrode 14 has eight linear slits 20 extending from the outer periphery toward the center. The slit 20 allows the current from the conductive rod 7 to flow through the coil electrode 13 and connect to the arc 1 of the main electrode 14 via the connection part 19.
00, a parallel magnetic field (not shown) is generated at the coil electrode 13. When a parallel magnetic field is applied to the main electrode 14, eddy currents flow in the main electrode 14, but the slits 20 can reduce the eddy currents. Therefore, the parallel magnetic field is less likely to be depolarized by the magnetic field caused by the eddy current.
主電極１４の構造は、第３図に示す如く、電極
基板２１たとえば無酸化銅の一端は、接続部１９
に接続し、他端はCo基板２２を介して接点部２
３および接点部を包囲する外周部２４とをろう付
けにより一体に固着している。接点部２３は第４
図に示すように中心に中心溝２５を有するリング
状の接点部２３Ａに形成してもよい。接点部２３
の高さ寸法は外周部２４のそれより高く、接点部
２３の電極材料は、Co，Ag並びにSeにより構成
している。接点部２３の成分範囲は、Co量20〜
80（％），Ag量13〜50（％），Se量７〜30（％）の範
囲内にて構成している。外周部２４の電極材料
は、Co，Ag並びにTe（テルル）により構成して
いる。外周部の成分範囲は、Co量20〜80（％），
Ag量18〜72（％），Te量５〜22（％）の範囲内に
て構成されている。 The structure of the main electrode 14 is as shown in FIG.
The other end is connected to the contact part 2 via the Co board 22.
3 and an outer peripheral portion 24 surrounding the contact portion are fixed together by brazing. The contact portion 23 is the fourth
As shown in the figure, it may be formed into a ring-shaped contact portion 23A having a central groove 25 in the center. Contact part 23
The height of the contact portion 23 is higher than that of the outer peripheral portion 24, and the electrode material of the contact portion 23 is made of Co, Ag, and Se. The component range of the contact part 23 is Co amount 20~
80 (%), Ag content in the range of 13 to 50 (%), and Se content in the range of 7 to 30 (%). The electrode material of the outer peripheral portion 24 is made of Co, Ag, and Te (tellurium). The component range of the outer periphery is Co amount 20 to 80 (%),
It is composed of an Ag content of 18 to 72 (%) and a Te content of 5 to 22 (%).
この主電極１４の構成によれば、Co基板２２
は接点部２３だけに限られ、Co基板２２の磁気
シールド効果は少なく、電極間空間の大部分の領
域は、外周部２４には有効な平行磁界を発生でき
る。一方、接点部２３と外周部２４とのアーク電
圧Ｖは、第５図Ａに示すように、両者ともほぼ等
しい。このため、接点部２３に点弧したアーク１
００は、スムーズに外周部２４に移り、接点部２
３を溶損することなく、しや断性能を向上するこ
とができる。 According to this configuration of the main electrode 14, the Co substrate 22
is limited only to the contact portion 23, the magnetic shielding effect of the Co substrate 22 is small, and an effective parallel magnetic field can be generated in the outer peripheral portion 24 in most of the inter-electrode space. On the other hand, the arc voltages V at the contact portion 23 and the outer peripheral portion 24 are approximately equal to each other, as shown in FIG. 5A. Therefore, the arc 1 ignited at the contact part 23
00 smoothly moves to the outer peripheral portion 24 and contacts the contact portion 2.
It is possible to improve the shear cutting performance without melting and damaging the parts.
また、接点部２３と外周部２４とのさい断電流
Ｉは、第５図Ｂに示す如く、外周部２４の方が接
点２３より多少大きい。このため、遮断時に、外
周部２４に点弧しているアーク１００は、接点部
２３より早く消弧する。それは、Teの蒸気圧が
Seのそれより低く、TeはSeより早く蒸発するか
ら、アーク１００は接点部２３より早く外周部２
３で消弧した後、接点部２３でアーク１００を点
弧しているので、電流零点又は電流零点附近で消
弧する。このため、第５図Ｂに示すようにSeの
さい断電流Ｉ（WA）は、Teのそれより小さいの
で、サージ電圧Ｖを小さくできる。したがつて、
本発明では従来のサージアブソーバを使用する必
要が無くなつたので、真空遮断器を小型化でき
る。 Further, the cutting current I between the contact portion 23 and the outer peripheral portion 24 is somewhat larger at the outer peripheral portion 24 than at the contact 23, as shown in FIG. 5B. Therefore, at the time of interruption, the arc 100 ignited in the outer peripheral portion 24 is extinguished earlier than the contact portion 23. It is because the vapor pressure of Te is
Since the temperature is lower than that of Se and Te evaporates faster than Se, the arc 100 evaporates at the outer peripheral portion 2 earlier than the contact portion 23.
After the arc is extinguished at step 3, since the arc 100 is ignited by the contact portion 23, the arc is extinguished at or near the current zero point. Therefore, as shown in FIG. 5B, the cutting current I (WA) of Se is smaller than that of Te, so the surge voltage V can be reduced. Therefore,
In the present invention, there is no need to use a conventional surge absorber, so the vacuum circuit breaker can be downsized.
この実施例で腕部、外周部から成る４個の磁界
発生部では、同方向の平行磁界を発生するコイル
電極を使用したが、４個の磁界発生部のうち対象
的に配置された２個づつが異なる方向の平行磁界
を発生するコイル電極を使用したり、或いは真空
容器の外側コイル巻回したコイル電極等を使用し
てもよい。 In this example, coil electrodes that generate parallel magnetic fields in the same direction were used in the four magnetic field generating parts consisting of the arm part and the outer peripheral part, but two of the four magnetic field generating parts were arranged symmetrically. It is also possible to use coil electrodes that generate parallel magnetic fields in different directions, or to use a coil electrode wound around a coil outside the vacuum container.
以上のように、本発明の真空遮断器によれば、
発生サージは小さくサージアブソーバを不要にな
り、真空遮断器を小形化できる。
As described above, according to the vacuum circuit breaker of the present invention,
The generated surge is small, eliminating the need for a surge absorber and making the vacuum circuit breaker more compact.
第１図は本発明の実施例として示した真空遮断
器の側断面図、第２図は第１図に使用した可動側
電極の斜視図、第３図は第２図の側断面図、第４
図は他の実施例として電極の側断面図、第５図Ａ
およびＢはアーク電圧およびさい断電流の特性図
である。
２……真空容器、８および９……固定側および
可動側電極、１３……コイル電極、１４……主電
極、２３……接点部、２４……外周部。
FIG. 1 is a side sectional view of a vacuum circuit breaker shown as an embodiment of the present invention, FIG. 2 is a perspective view of the movable electrode used in FIG. 1, and FIG. 3 is a side sectional view of FIG. 4
The figure is a side sectional view of an electrode as another example, FIG.
and B are characteristic diagrams of arc voltage and cutting current. 2... Vacuum vessel, 8 and 9... Fixed side and movable side electrodes, 13... Coil electrode, 14... Main electrode, 23... Contact portion, 24... Outer peripheral portion.
Claims (1)
電極を配置し、主電極に平行磁界を印加する真空
遮断器において、上記主電極は中央部にコバル
ト、銀並びにセレンより成る接点部と、接点部の
周囲にコバルト、銀並びにテルルより成る外周部
と、から構成することを特徴とする真空遮断器。 ２ 上記主電極は電極基板上に上記接点部および
外周部を配置し、外周部と電極基板との間および
接点部と電極基板との間にコバルト層を介して、
それぞれろう付けより一体に構成することを特徴
とする特許請求の範囲第１項記載の真空遮断器。 ３ 接点部の高さ寸法を外周部のそれより高く構
成することを特徴とする特許請求の範囲第１項又
は第２項記載の真空遮断器。[Scope of Claims] 1. A vacuum circuit breaker in which at least one pair of main electrodes that can be freely moved toward and away from the vacuum container is arranged, and a parallel magnetic field is applied to the main electrodes, the main electrodes having a central portion made of cobalt, silver, and selenium. 1. A vacuum circuit breaker comprising: a contact portion made of the same material; and an outer peripheral portion surrounding the contact portion made of cobalt, silver, or tellurium. 2. The main electrode has the contact portion and the outer peripheral portion disposed on the electrode substrate, and a cobalt layer is interposed between the outer peripheral portion and the electrode substrate and between the contact portion and the electrode substrate.
2. The vacuum circuit breaker according to claim 1, wherein each of the vacuum circuit breakers is integrally constructed by brazing. 3. The vacuum circuit breaker according to claim 1 or 2, wherein the height of the contact portion is higher than that of the outer peripheral portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3859884A JPS60185320A (en) | 1984-03-02 | 1984-03-02 | Vacuum breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3859884A JPS60185320A (en) | 1984-03-02 | 1984-03-02 | Vacuum breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60185320A JPS60185320A (en) | 1985-09-20 |
| JPH0479090B2 true JPH0479090B2 (en) | 1992-12-15 |
Family
ID=12529711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3859884A Granted JPS60185320A (en) | 1984-03-02 | 1984-03-02 | Vacuum breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60185320A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2643037B2 (en) * | 1991-06-17 | 1997-08-20 | 三菱電機株式会社 | Vacuum switch tube |
| JP2003092221A (en) * | 2001-09-17 | 2003-03-28 | Densei Lambda Kk | Inductance component |
| JP2014116183A (en) * | 2012-12-10 | 2014-06-26 | Toshiba Corp | Vacuum valve |
-
1984
- 1984-03-02 JP JP3859884A patent/JPS60185320A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60185320A (en) | 1985-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5793008A (en) | Vacuum interrupter with arc diffusing contact design | |
| EP0076659B1 (en) | A vacuum interrupter | |
| KR920006060B1 (en) | Vacuum switch tube | |
| US4367382A (en) | Vacuum circuit breaker | |
| US4551596A (en) | Surge-absorberless vacuum circuit interrupter | |
| US4501941A (en) | Vacuum interrupter contact material | |
| JPH0479090B2 (en) | ||
| US4430536A (en) | Vacuum interrupter | |
| US5661281A (en) | Vacuum-type interrupter having an annular insulator | |
| US5254817A (en) | Vacuum switch tube | |
| KR910001370B1 (en) | Vacuum circuit interrupter | |
| US4695688A (en) | Electrical contact construction | |
| JPS635846B2 (en) | ||
| JPH0715078Y2 (en) | Disconnector | |
| JPS6357897B2 (en) | ||
| JP2939271B2 (en) | Gas circuit breaker for electric power | |
| JPH10255602A (en) | Vacuum switching device | |
| JPH04132127A (en) | Contact point for vacuum bulb | |
| JPH0887931A (en) | Gas circuit breaker | |
| JPH0132714Y2 (en) | ||
| JPS60146418A (en) | Vacuum bulb | |
| JPH0479089B2 (en) | ||
| JPS6260781B2 (en) | ||
| JPH038231A (en) | Circuit breaker | |
| JPS62206725A (en) | Vacuum breaker |