JPS5847627Y2 - Vacuum cutter - Google Patents
Vacuum cutterInfo
- Publication number
- JPS5847627Y2 JPS5847627Y2 JP8815379U JP8815379U JPS5847627Y2 JP S5847627 Y2 JPS5847627 Y2 JP S5847627Y2 JP 8815379 U JP8815379 U JP 8815379U JP 8815379 U JP8815379 U JP 8815379U JP S5847627 Y2 JPS5847627 Y2 JP S5847627Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- contact
- magnetic field
- contact electrode
- coil
- 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
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Description
【考案の詳細な説明】 本考案は真空しゃ断器に関するものである。[Detailed explanation of the idea] The present invention relates to a vacuum breaker.
一般に真空しゃ断器は真空容器内に固定電極と可動電極
を対向配置して構成され、可動電極を固定電極に対して
接離することにより電流の投入、しゃ断を行なっている
。Generally, a vacuum breaker is constructed by disposing a fixed electrode and a movable electrode facing each other in a vacuum container, and turns on and cuts off current by moving the movable electrode toward and away from the fixed electrode.
しかるにしゃ断時には電極間にアークが発生し、このア
ークはしゃ断電流が大きいとアーク自身により生じた磁
界と外部回路の作る磁界との相互作用により電極外周方
向への電磁力を受け、アークは電極の外周部に片寄って
局部的に加熱し、多量の金属蒸気を発生させる。However, when breaking, an arc is generated between the electrodes, and if the breaking current is large, this arc receives electromagnetic force in the direction of the electrode's outer circumference due to the interaction between the magnetic field generated by the arc itself and the magnetic field created by the external circuit, and the arc It heats up locally near the outer periphery and generates a large amount of metal vapor.
このため、電流零点後に電極間に金属蒸気イオンが残留
し、絶縁回復が遅れてしゃ断続力が低下する。For this reason, metal vapor ions remain between the electrodes after the current reaches zero, delaying insulation recovery and reducing breaking power.
そこで従来では、電極を軸方向磁界を発生するコイル電
極とコイル電極に電気的に接続されるとともに対向電極
と接離する接触電極とで構成し、しゃ断時に接触電極に
発生したアークに軸方向磁界を印加することが行なわれ
ている。Therefore, conventionally, the electrode is composed of a coil electrode that generates an axial magnetic field and a contact electrode that is electrically connected to the coil electrode and makes contact with and separates from the opposing electrode. is being applied.
この場合、アーク電流を運ぶ電子およびイオンなどの荷
電粒子が軸方向磁界に捕捉されるためアークの集中が妨
げられ、接触電極は局部的に加熱されることがないため
多量の金属蒸気を発生せず、しゃ断続力が向上する。In this case, charged particles such as electrons and ions carrying the arc current are trapped in the axial magnetic field, preventing arc concentration, and the contact electrode is not locally heated, producing a large amount of metal vapor. This improves the intermittent power.
しかし、一方では軸方向磁界により接触電極にうず電流
が発生し、このうず電流は軸方向磁界を弱める磁界を発
生するばかりでなく、軸方向磁界にしゃ断電流に対する
位相遅れを生じさせる。However, on the other hand, the axial magnetic field generates eddy current in the contact electrode, and this eddy current not only generates a magnetic field that weakens the axial magnetic field, but also causes a phase lag in the axial magnetic field with respect to the cutoff current.
このため、電流零点後も磁界が残留して金属蒸気の拡散
を妨げ、しゃ断続力を低下させるという問題を生じた。For this reason, a problem arises in that the magnetic field remains even after the current reaches zero, impeding the diffusion of metal vapor and reducing the breaking force.
そこで、従来ではさらに、接触電極に複数本のスリット
を設けて接触電極を中心部を除いて細分し、うず電流の
発生を抑制している。Therefore, conventionally, a plurality of slits are provided in the contact electrode to subdivide the contact electrode except for the center part, thereby suppressing the generation of eddy current.
しかし、この場合には接触電極の表面に角部が生じてア
ークの集中を招くという欠点が生じた。However, in this case, corners were formed on the surface of the contact electrode, leading to concentration of arcs.
本考案は上記のことを考慮して、電極の表面にアークを
安定かつ均一に分布させることにより局部加熱を防止し
、しゃ断続力を向上させることができる真空しゃ断器を
提供することを目的とする。Taking the above into consideration, the present invention aims to provide a vacuum breaker that can prevent local heating and improve the breaking force by stably and uniformly distributing the arc on the surface of the electrode. do.
以下本考案の実施例を図面とともに説明する。Embodiments of the present invention will be described below with reference to the drawings.
第１図において、１は絶縁筒、２，３は絶縁筒１の両端
に取付けられた端板、４は端板２に挿着された固定電極
棒、５は端板３に挿通されるとともにベローズ６を介し
て端板３に取付けられた可動電極棒で、絶縁筒１、端板
２，３およびベローズ６により真空容器を構成する。In FIG. 1, 1 is an insulating tube, 2 and 3 are end plates attached to both ends of the insulating tube 1, 4 is a fixed electrode rod inserted into the end plate 2, and 5 is inserted through the end plate 3. The movable electrode rod is attached to the end plate 3 via the bellows 6, and the insulating cylinder 1, the end plates 2 and 3, and the bellows 6 constitute a vacuum container.
７，８は夫々電極棒４，５の先端に対向して取付けられ
た固定電極および可動電極、９は可動電極棒５に取付け
られた基部９ａと基部９ａからコイル状に伸びるコイル
部９ｂとを有するコイル電極、１０は基部９ａに高抵抗
材のスペーサ１１を介して取付けられるとともに接続導
体１２を介してコイル部９ｂの先端と電気的に接続され
た接触電極で、接触電極１０は固定電極７と接触しない
側の面に複数本の切込溝１０ ａを放射状に設けられる
。Reference numerals 7 and 8 designate a fixed electrode and a movable electrode that are attached to the tips of the electrode rods 4 and 5, respectively, and 9 a base 9a that is attached to the movable electrode rod 5 and a coil portion 9b that extends in a coil shape from the base 9a. A coil electrode 10 is a contact electrode attached to the base 9a via a spacer 11 made of a high resistance material and electrically connected to the tip of the coil portion 9b via a connecting conductor 12. The contact electrode 10 is connected to the fixed electrode 7. A plurality of cut grooves 10a are provided radially on the side that does not come into contact with the surface.
コイル電極９、接触電極１０、スペーサ１１および接続
導体１２により可動電極８が構成され、全く同様にして
コイル電極１３、可動電極８との非接触面側に切込溝１
４ａを有する接触電極１４、スペーサ１５および接続導
体１６により固定電極７が構成される。A movable electrode 8 is constituted by a coil electrode 9, a contact electrode 10, a spacer 11, and a connecting conductor 12, and in exactly the same way, a cut groove 1 is formed on the side of the non-contact surface with the coil electrode 13 and the movable electrode 8.
The fixed electrode 7 is constituted by the contact electrode 14 having the shape 4a, the spacer 15 and the connecting conductor 16.
上記の真空しゃ断器ではしゃ断時にしゃ断電流は例えば
可動電極棒５−コイル電極９−接続導体１２−接触電極
１０−アーク−接触電極１４−接続導体１６−コイル電
極１３−固定電極棒４と流れ、各コイル電極９，１３は
軸方向磁界を発生する。In the above-mentioned vacuum breaker, when the circuit is cut off, the cutoff current flows, for example, through the movable electrode rod 5 - the coil electrode 9 - the connecting conductor 12 - the contact electrode 10 - the arc - the contact electrode 14 - the connecting conductor 16 - the coil electrode 13 - the fixed electrode rod 4, Each coil electrode 9, 13 generates an axial magnetic field.
一方、接触電極１０．１４は非接触面側に切込溝１０
ａ 、１４ ａを有しており、切込溝１０ ａ 、１４
ａの部分は抵抗が大きくなるため各接触電極１０．１
４は電気的には細分化され、うず電流は抑制される。On the other hand, the contact electrode 10.14 has a cut groove 10 on the non-contact surface side.
a, 14a, and cut grooves 10a, 14a.
Each contact electrode 10.1 has a large resistance in the part a.
4 is electrically subdivided and eddy currents are suppressed.
しかも各接触電極１０．１４の接触面側は滑らかである
のでアークの集中は生じない。Moreover, since the contact surface side of each contact electrode 10.14 is smooth, arc concentration does not occur.
第２〜６図は夫々本考案の他の実施例を示すもので、第
２図の場合には接触電極１７の接触面側を円錐台状に形
成するとともに非接触面側は大径のカッタ１８を用いて
切込溝１７ ａを放射状に設け、第３図の場合には接触
電極１９の接触面側を円錐台状に形成するとともに非接
触面側は比較的小径のカッタ２０を用いて切込溝１９
ａを放射状に設けている。2 to 6 respectively show other embodiments of the present invention. In the case of FIG. 2, the contact surface side of the contact electrode 17 is formed into a truncated cone shape, and the non-contact surface side is formed with a large diameter cutter. In the case of FIG. 3, the contact surface side of the contact electrode 19 is formed into a truncated conical shape, and the non-contact surface side is formed with a cutter 20 having a relatively small diameter. Cut groove 19
a are arranged radially.
又、第４図の場合には接触電極２１の接触面側を円錐台
状に形成するとともに非接触面器は小径のカッタ２２を
若干半径方向に移動して切削を行なってやはり切込溝２
１ ａを放射状に設け、第５図の場合には接触電極２３
の接触面側は平らな接触面２３ ａを除いて曲面状にす
るとともに非接触面側はこの曲面径よりやや小さい径の
カッタ２４を用いて切込溝２３ ｂを放射状に形成し、
切込溝２３ ｂの部分の接触電極２３の厚さｄｌを全面
に渡ってほぼ一定としている。In the case of FIG. 4, the contact surface side of the contact electrode 21 is formed into a truncated conical shape, and the non-contact surface cutter moves the small-diameter cutter 22 slightly in the radial direction to cut the cut groove 2.
1a are provided radially, and in the case of FIG. 5, contact electrodes 23
The contact surface side is curved except for the flat contact surface 23a, and the non-contact surface side is radially formed with cutting grooves 23b using a cutter 24 having a diameter slightly smaller than this curved surface diameter.
The thickness dl of the contact electrode 23 at the cut groove 23b is made substantially constant over the entire surface.
さらに、第６図の場合には接触電極２５の接触面側は平
らな接触面２５ ａを除いてアーク移行部２５ ｂを曲
面状に形成するとともに非接触面側はこの曲面径よりや
や小さい径のカッタ２６を用いて切削して切込溝２５
Ｃを放射状に形威し、アーク移行部２５ ｂと切込溝２
５ Ｃの間の接触電極２５の厚さｄ２をほぼ一定として
いる。Furthermore, in the case of FIG. 6, the contact surface side of the contact electrode 25 has an arc transition portion 25b formed into a curved surface except for the flat contact surface 25a, and the non-contact surface side has a diameter slightly smaller than this curved surface diameter. The cutter 26 is used to cut the cut groove 25.
C is shaped radially, and the arc transition part 25b and the cut groove 2
The thickness d2 of the contact electrode 25 between 5 C and 5 C is substantially constant.
これら第２〜６図に夫々示した各実施例においても前述
の第１の実施例の場合と同様な効果を有する。Each of the embodiments shown in FIGS. 2 to 6 has the same effects as the first embodiment described above.
以上のように本考案においては電極を軸方向磁界を発生
するコイル電極と対向電極と接触する接触電極とから構
成するとともに、接触電極の非接触面側には複数本の切
込溝を設けている。As described above, in this invention, the electrode is composed of a coil electrode that generates an axial magnetic field and a contact electrode that contacts the counter electrode, and a plurality of grooves are provided on the non-contact surface of the contact electrode. There is.
このため、接触電極は電気的には細分化されており、軸
方向磁界によるうず電流は抑制される。Therefore, the contact electrode is electrically subdivided, and eddy currents caused by the axial magnetic field are suppressed.
従って、軸方向磁界は弱められたり、仕相遅れを生じた
りすることがなく、シかも接触電極の接触面側は滑らか
であるのでアークの集中は生じ難いため、アークは接触
電極上に安定かつ均一に分布されるとともに電流零点後
は軸方向磁界が消滅して金属蒸気イオンの拡散が有効に
行なわれ、しゃ断能力は向上する。Therefore, the axial magnetic field is not weakened or delayed, and since the contact surface of the contact electrode is smooth, arc concentration is difficult to occur, so the arc is stable and stable on the contact electrode. In addition to being uniformly distributed, the axial magnetic field disappears after the current zero point, and the metal vapor ions are effectively diffused, improving the cutting ability.
又、接触電極はアークの集中による損傷が生じず、寿命
が長くなる。In addition, the contact electrode is not damaged by arc concentration and has a longer lifespan.
尚、本考案に係る電極構造は対向電極の一方又は双方に
適用することができる。Note that the electrode structure according to the present invention can be applied to one or both of the opposing electrodes.
第１図Ａ−Ｄは夫々本考案の第１の実施例に係る真空し
ゃ断器の縦断正面図、コイル電極の斜視図、接触電極の
縦断正面図および接触電極の底面図、第２図Ａ、Ｂは夫
々本考案の第２の実施例に係る接触電極の縦断正面図お
よび底面図、第３図Ａ。
Ｂは夫々本考案の第３の実施例に係る接触電極の縦断正
面図および底面図、第４〜６図は夫々本考案の第４〜第
６の実施例に係る接触電極の縦断正面図。
１・・・・・・絶縁筒、２，３・・・・・・端板、４・
・・・・・固定電極棒、５・・・・・・可動電極棒、６
・・・・・・ベローズ、７・・・・・・固定電極、８・
・・・・・可動電極、９，１３・・・・・・コイル電極
、１０，１４，１７゜１９．２１．２３・・・・・・接
触電極、１０ ａ 、１４ ａ 、１７ ａ、１９ ａ
。
２１ ａ 、２３ ｂ 、２５ Ｃ・・・・・・切込溝
、１２．１６・・・・・・接続導体。1A to 1D are a longitudinal sectional front view of a vacuum breaker according to a first embodiment of the present invention, a perspective view of a coil electrode, a longitudinal sectional front view of a contact electrode, a bottom view of a contact electrode, and FIG. 2A, B is a longitudinal sectional front view and a bottom view of a contact electrode according to a second embodiment of the present invention, respectively, and FIG. 3A. B is a longitudinal sectional front view and a bottom view of a contact electrode according to a third embodiment of the present invention, respectively, and FIGS. 4 to 6 are longitudinal sectional front views of a contact electrode according to fourth to sixth embodiments of the present invention, respectively. 1... Insulating cylinder, 2, 3... End plate, 4.
...Fixed electrode rod, 5...Movable electrode rod, 6
...Bellows, 7...Fixed electrode, 8.
...Movable electrode, 9,13...Coil electrode, 10,14,17゜19.21.23...Contact electrode, 10a, 14a, 17a, 19 a
. 21 a, 23 b, 25 C... cut groove, 12.16... connection conductor.
Claims (1)
に対向配置した真空しゃ断器において、電極棒に取付け
られて軸方向磁界を発生するコイル電極と、コイル電極
と電気的に接続されるとともに対向電極と接触しない側
の面に複数本の切込溝を設けられた接触電極とから少く
とも一方の電極を構成したことを特徴とする真空しゃ断
器。In a vacuum breaker, a pair of electrodes are arranged facing each other in a vacuum container so as to be able to come into contact with and separate from each other through electrode rods, and a coil electrode that is attached to the electrode rod and generates an axial magnetic field is electrically connected to the coil electrode. 1. A vacuum breaker characterized in that at least one electrode is constituted by a contact electrode having a plurality of notch grooves on a side surface not in contact with a counter electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8815379U JPS5847627Y2 (en) | 1979-06-27 | 1979-06-27 | Vacuum cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8815379U JPS5847627Y2 (en) | 1979-06-27 | 1979-06-27 | Vacuum cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS565342U JPS565342U (en) | 1981-01-17 |
| JPS5847627Y2 true JPS5847627Y2 (en) | 1983-10-31 |
Family
ID=29321347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8815379U Expired JPS5847627Y2 (en) | 1979-06-27 | 1979-06-27 | Vacuum cutter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5847627Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0785754A (en) * | 1992-11-10 | 1995-03-31 | Mitsubishi Electric Corp | Vacuum valve |
-
1979
- 1979-06-27 JP JP8815379U patent/JPS5847627Y2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0785754A (en) * | 1992-11-10 | 1995-03-31 | Mitsubishi Electric Corp | Vacuum valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS565342U (en) | 1981-01-17 |
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