JPH0334227A - Vacuum circuit breaker electrode - Google Patents
Vacuum circuit breaker electrodeInfo
- Publication number
- JPH0334227A JPH0334227A JP16665689A JP16665689A JPH0334227A JP H0334227 A JPH0334227 A JP H0334227A JP 16665689 A JP16665689 A JP 16665689A JP 16665689 A JP16665689 A JP 16665689A JP H0334227 A JPH0334227 A JP H0334227A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- magnetic field
- support plate
- arc
- hole
- 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
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
- 238000009826 distribution Methods 0.000 abstract description 9
- 230000004907 flux Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002470 thermal conductor Substances 0.000 description 2
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 1
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
- H01H33/6644—Contacts; Arc-extinguishing means, e.g. arcing rings having coil-like electrical connections between contact rod and the proper contact
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、真空遮断器の電極構造に係り、特に、電極の
熱容量を増加させるとともに１発生磁界の歪みを無くす
る電極構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electrode structure for a vacuum circuit breaker, and particularly to an electrode structure that increases the heat capacity of the electrode and eliminates distortion of the generated magnetic field.
真空遮断器において真空アークに平行な磁界を与えると
遮断能力が増加することはよく知られている。この種の
電極として特開昭６２−３１９１６号に記載の第３図の
電極がある。第３図は真空遮断器に使用される可動、又
は、固定電極のうち、一方を分解図として描いた。この
電極はリード棒３゜底板５．コイル１．アーク電極７よ
り構成され電流４はこれらの各構成要素を流れ、アーク
８となって対向する電極に流れこむ、コイル１はスリッ
ト１０により円周上で数分割されコイル片６を構成する
。コイル片６は熱的な良導体である支持板９で互いに結
合され、コイル１の形体を保持している。コイル片６の
上端、下端部には各々突出部１１があり、この突出部１
１と底板５．アーク電極７が接続される。リード棒３よ
りの電流４は底板５に接続されている突出部１１により
分流され。It is well known that in a vacuum circuit breaker, applying a magnetic field parallel to the vacuum arc increases the breaking ability. An example of this type of electrode is the electrode shown in FIG. 3, which is described in JP-A-62-31916. FIG. 3 is an exploded view of one of the movable and fixed electrodes used in the vacuum circuit breaker. This electrode consists of a lead rod of 3 degrees and a bottom plate of 5 degrees. Coil 1. The coil 1 is composed of an arc electrode 7, and a current 4 flows through each of these components and becomes an arc 8 and flows into the opposing electrode.The coil 1 is divided into several parts on the circumference by slits 10 to form coil pieces 6. The coil pieces 6 are connected to each other by a support plate 9, which is a good thermal conductor, and maintain the shape of the coil 1. There are protrusions 11 at the upper and lower ends of the coil piece 6, respectively.
1 and bottom plate 5. Arc electrode 7 is connected. A current 4 from the lead rod 3 is shunted by a protrusion 11 connected to the bottom plate 5.
各コイル片６により円周方向に流れる。この円周方向に
流れる電流によりアーク８に平行な磁界を作用させる。Each coil piece 6 causes the flow to flow in the circumferential direction. A parallel magnetic field is applied to the arc 8 by this current flowing in the circumferential direction.
第４図はコイルｌの平面図と側面図である。スリット１
０で分割されたコイル片６を結合する支持板９はコイル
深さの任意の位置にある。第５図はコイル１の各部を流
れる電流を示す図である。各コイル片に流れ込んだ電流
１２は円周方向に流れる電流１３と支持板９を通って他
のコイル片６に流れる電流１４．１５に分流される。FIG. 4 is a plan view and a side view of the coil l. slit 1
The support plate 9 that connects the coil pieces 6 divided at zero is located at an arbitrary position in the coil depth. FIG. 5 is a diagram showing the current flowing through each part of the coil 1. The current 12 flowing into each coil piece is divided into a current 13 flowing in the circumferential direction and a current 14, 15 flowing through the support plate 9 to the other coil pieces 6.
ここで、支持板９を流れる電流１４．１５は他のコイル
片６からも流れ出し、各々、流れの方向が逆であり総和
として支持板９にはほとんど電流が流れない。次に、コ
イル片６のどれかが局部加熱した場合を考える。各コイ
ル片６は熱的な良導体である支持板９で結合されている
ため、高温のコイル片６より支持板９を通って低温のコ
イル片６に熱流が発生し、この熱流はコイル片６の各温
度がバランスするまで流れ、コイル片６の極部加熱を防
止する。支持板９はこのほか、コイル片６を円形に保持
する構造部材、及び、補強部材としても作用、している
、このように、支持板９でコイル片６を結合することに
より、コイルの局部加熱を防ぐことができ、通電性能を
向上することができる。Here, the current 14.15 flowing through the support plate 9 also flows from the other coil pieces 6, and the flow directions are opposite to each other, so that almost no current flows through the support plate 9 in total. Next, consider a case where any of the coil pieces 6 is locally heated. Since each coil piece 6 is connected by a support plate 9 which is a good thermal conductor, a heat flow is generated from the high temperature coil piece 6 through the support plate 9 to the low temperature coil piece 6. The flow continues until the respective temperatures of the coil pieces 6 are balanced, and heating of the extreme parts of the coil piece 6 is prevented. The support plate 9 also functions as a structural member that holds the coil pieces 6 in a circular shape and as a reinforcing member. By joining the coil pieces 6 with the support plate 9 in this way, the local parts of the coil are Heating can be prevented and current carrying performance can be improved.
上記従来技術はコイル片６より発生する磁束により支持
板９の中央に渦電流が流れ、アークに作用する平行磁界
分布を乱してしまうという問題があった。The conventional technique described above has a problem in that an eddy current flows in the center of the support plate 9 due to the magnetic flux generated by the coil piece 6, which disturbs the parallel magnetic field distribution acting on the arc.
本発明の目的は、コイルの局部加熱の防止に有効な支持
板を付けたまま、中央の渦電流が流れない構造とし、ア
ークに作用する磁界分布の均一化を保持することにある
。An object of the present invention is to create a structure in which eddy currents do not flow in the center while maintaining a uniform support plate that is effective in preventing local heating of the coil, and to maintain a uniform distribution of the magnetic field acting on the arc.
上記目的を達成するために、支持板の中央に渦電流防止
用のスリット又は孔を設ける。In order to achieve the above object, a slit or hole for preventing eddy currents is provided in the center of the support plate.
支持体の中央に付けたスリット、又は、孔は尚電流の流
れを阻止、又は、減少させ、磁界分布の均一化を保持し
、遮断性能の低下を防ぐことができる。A slit or hole in the center of the support can still block or reduce the flow of current, keep the magnetic field distribution uniform, and prevent deterioration of the blocking performance.
以下、本発明の一実施例を第１図、第２図により説明す
る。第１図はコイル１のみの平面図である。図示以外の
電極構成は第３図の従来構成と同しである。リード捧３
、底板５を流れる電流は各巻の突出部１１を通ってコイ
ル片６により円周方向に流れる。支持板９には、従来例
で説明したように、主電流４は流れず、コイル片６の温
度の均一化のみに作用する。支持板９の中央には孔１６
がある。コイル片６を流れる電流は等価的に一巻コイル
を構威し、アークに平行する磁界を発生するとともに、
その磁束はコイル１の内部にある支持板９と鎖交し、支
持板９の内部に渦電流が流れる。この渦電流はコイル中
心部が最も多いが、本発明のように、支持板９の中央に
孔１６を設けることにより、渦電流が流れない。第６図
は支持板９の中央の孔が無い場合の従来電極の磁界分布
実測例である。支持板９の渦電流のため磁界分布が歪ん
でいる。第７図は本発明の支持板９の中央に孔１６があ
る場合の磁界分布の実測例である。支持板９内の渦電流
が減少することにより、磁界分布の歪が無くなっている
。アークに作用する磁界は電極間でできるだけ均一にし
てアークの局部集中が無く遮断性能を増加させる。本実
施例によれば、磁界の歪がむくなり、遮断性能が増す。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a plan view of only the coil 1. The electrode configuration other than those shown is the same as the conventional configuration shown in FIG. Lead tribute 3
, the current flowing through the bottom plate 5 flows circumferentially through the coil piece 6 through the protrusion 11 of each turn. As explained in the conventional example, the main current 4 does not flow through the support plate 9, and acts only to equalize the temperature of the coil pieces 6. A hole 16 is provided in the center of the support plate 9.
There is. The current flowing through the coil piece 6 equivalently constitutes a one-turn coil, generating a magnetic field parallel to the arc, and
The magnetic flux interlinks with the support plate 9 inside the coil 1, and an eddy current flows inside the support plate 9. This eddy current is most prevalent at the center of the coil, but by providing the hole 16 in the center of the support plate 9 as in the present invention, no eddy current flows. FIG. 6 is an example of an actual measurement of the magnetic field distribution of a conventional electrode when the support plate 9 does not have a central hole. The magnetic field distribution is distorted due to the eddy current in the support plate 9. FIG. 7 is an example of actual measurement of the magnetic field distribution when the support plate 9 of the present invention has a hole 16 in the center. By reducing the eddy current in the support plate 9, distortion in the magnetic field distribution is eliminated. The magnetic field acting on the arc is made as uniform as possible between the electrodes to prevent local concentration of the arc and increase interrupting performance. According to this embodiment, the distortion of the magnetic field is reduced and the interrupting performance is increased.
第２図は支持板９の孔の代りにスリット１７を付けたも
のである。スリットを付けることにより、渦電流が減少
し、磁界の歪を無くすることができる。In FIG. 2, a slit 17 is provided in place of the hole in the support plate 9. By providing slits, eddy currents can be reduced and distortion of the magnetic field can be eliminated.
支持板９の渦電流を減じる方法には以上説明した方法の
ほかに、任意の孔とスリットを組合せる方法もある。In addition to the method described above, there is also a method for reducing the eddy current in the support plate 9 by combining arbitrary holes and slits.
本発明によれば、支持板の内部に発生する渦電流を減少
することができ、アークに作用する磁界の歪を生じさせ
ず、アークの局部集中がなくなり。According to the present invention, eddy currents generated inside the support plate can be reduced, distortion of the magnetic field acting on the arc is not caused, and local concentration of the arc is eliminated.
遮断性能を向上させることができる。Breaking performance can be improved.
【図面の簡単な説明】
第１図は本発明の一実施例のコイルの支持板の中央に孔
を設けた平面図、第２図は第１図の支持板の孔の代りに
スリットを付けた平面図、第３図は従来電極の分解組立
図、第４図は従来のコイルの平面図（ａ）と側面図（ｂ
）、第５図はコイル内の電流分流説明図、第６図は従来
電極の磁界分布図、第７図は本発明の磁界分布図である
。
ｌ・・・コイル、９・・・支持板、１０・・・スリット
、１６第
図
弔
図
第
図
第４図
醋ン
第５図[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a plan view of a support plate of a coil according to an embodiment of the present invention with a hole provided in the center, and Fig. 2 shows a support plate with a slit in place of the hole shown in Fig. 1. 3 is an exploded view of a conventional electrode, and FIG. 4 is a plan view (a) and a side view (b) of a conventional coil.
), FIG. 5 is an explanatory diagram of current division in the coil, FIG. 6 is a diagram of the magnetic field distribution of a conventional electrode, and FIG. 7 is a diagram of the magnetic field distribution of the present invention. l...Coil, 9...Support plate, 10...Slit, 16th figure, funeral map, figure 4, figure 5
Claims (1)
記リード棒の内端部に電極が固着され、前記電極部の背
部にアークに平行な磁界を発生するコイルが設けられ、
前記コイルが複数に分割され、前記コイルの分割片を流
れる電流により、電気的に前記アークに平行する磁界を
発生し、前記コイル分割片を各々結合し前記コイルを形
成する支持板を備えた真空遮断器用電極において、 前記支持板内に発生する渦電流を減少させる孔、溝等を
付けたことを特徴とする真空遮断器用電極。[Claims] 1. A pair of lead rods that can be moved into and out of a vacuum container, an electrode is fixed to the inner end of the lead rod, and a magnetic field parallel to the arc is generated at the back of the electrode portion. A coil is provided,
a vacuum comprising a support plate in which the coil is divided into a plurality of parts, a current flowing through the divided pieces of the coil electrically generates a magnetic field parallel to the arc, and each of the coil divided pieces is joined to form the coil; An electrode for a vacuum circuit breaker, characterized in that the support plate has holes, grooves, etc. that reduce eddy current generated within the support plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16665689A JPH0334227A (en) | 1989-06-30 | 1989-06-30 | Vacuum circuit breaker electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16665689A JPH0334227A (en) | 1989-06-30 | 1989-06-30 | Vacuum circuit breaker electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0334227A true JPH0334227A (en) | 1991-02-14 |
Family
ID=15835306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16665689A Pending JPH0334227A (en) | 1989-06-30 | 1989-06-30 | Vacuum circuit breaker electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0334227A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015145857A (en) * | 2014-02-04 | 2015-08-13 | 株式会社ミツトヨ | Induction type position measurement device |
-
1989
- 1989-06-30 JP JP16665689A patent/JPH0334227A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015145857A (en) * | 2014-02-04 | 2015-08-13 | 株式会社ミツトヨ | Induction type position measurement device |
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