JPS62206725A - Vacuum breaker - Google Patents
Vacuum breakerInfo
- Publication number
- JPS62206725A JPS62206725A JP4996386A JP4996386A JPS62206725A JP S62206725 A JPS62206725 A JP S62206725A JP 4996386 A JP4996386 A JP 4996386A JP 4996386 A JP4996386 A JP 4996386A JP S62206725 A JPS62206725 A JP S62206725A
- Authority
- JP
- Japan
- Prior art keywords
- melting point
- copper
- current
- metal
- vacuum 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.)
- Pending
Links
- 230000008018 melting Effects 0.000 claims description 23
- 238000002844 melting Methods 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 19
- 239000010949 copper Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 7
- 239000007769 metal material Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 5
- 229910052797 bismuth Inorganic materials 0.000 description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (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】
［産業上の利用分野］
この発明は真空しゃ断器、詳しくは、真空しゃ断器の電
極用材料に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a vacuum breaker, and more particularly to a material for electrodes of a vacuum breaker.
［従来の技術］
真空しゃ断器は、真空の有する強い消弧力を利用して電
流をしゃ断するものであるが、交流電流をしゃ断する場
合、真空の持つ強い消弧力のために電流零点に達する前
に、アークが不安定となり、さらにはアークが消失して
しまうという電流さい新現象が起こる。この電流さい新
現象は、事故電流などのような、大電流をしゃ断する際
には発生しないが、負荷電流のような比較的小さな電流
をしゃ断する場合に発生しやすい、そして、電流さい断
は過電圧の発生の一原因となり、回路に接続されている
機器の絶縁破壊の原因ともなる。[Prior Art] Vacuum circuit breakers use the strong arc-extinguishing force of vacuum to interrupt current. However, when interrupting alternating current, the strong arc-extinguishing force of vacuum causes the current to reach zero point. Before reaching this point, a new phenomenon occurs in which the arc becomes unstable and even disappears. This current cutting phenomenon does not occur when cutting off a large current such as a fault current, but it tends to occur when cutting off a relatively small current such as a load current. This can cause overvoltage and can also cause insulation breakdown in equipment connected to the circuit.
従来、この電流さい断値を低下させる方法として、銅よ
り融点が低い金属材料を含む合金を用いて一対の電極を
構成する方法が用いられてきた。Conventionally, as a method for reducing this current cutoff value, a method has been used in which a pair of electrodes is constructed using an alloy containing a metal material having a melting point lower than that of copper.
［発明が解決しようとする問題点］
上記の方法によると、さい断電流値は低下するが、その
半面、両電極とも銅より融点が低い金属材′ＦＬを含ん
でいるため、容易に金属蒸気を放出し、この金属蒸気が
両電極の表面全体に拡散する。このためアークが分１１
にシ、電流密度が低下するため電極のアーク駆動力が低
下して、アークの停滞や電極表面の溶融が生じ、しゃ断
失敗の原因となっていた。[Problems to be Solved by the Invention] According to the above method, the cutting current value decreases, but on the other hand, since both electrodes contain a metal material 'FL' having a lower melting point than copper, metal vapor easily is released and this metal vapor diffuses over the entire surface of both electrodes. Therefore, the arc is 11 minutes
However, as the current density decreases, the arc driving force of the electrode decreases, causing arc stagnation and melting of the electrode surface, leading to failure.
したがって、上記のようなしゃ断性能の低下を補うため
には、従来の真空しゃ断器においては電極の口径を太き
くしなけれがならなかった。Therefore, in order to compensate for the above-mentioned decrease in the breaking performance, it was necessary to increase the diameter of the electrode in the conventional vacuum breaker.
本発明は、上記のような問題点を解決するためになされ
たもので、小型でかつしゃ断性能の優れた真空しゃ断器
を提供することを目的とする。The present invention was made in order to solve the above problems, and an object of the present invention is to provide a vacuum breaker that is small in size and has excellent breaking performance.
［問題点を解決するための手段］
本発明における真空しゃ断器は、一対の接離可能な電極
を真空容器内に設置し、上記一対の電極の一方を銅より
融点の低い金属元素を含む材料で形成し、他方を銅より
融点が低い金属元素を含まない材料で形成している。[Means for Solving the Problems] The vacuum breaker of the present invention has a pair of detachable electrodes installed in a vacuum container, and one of the pair of electrodes is made of a material containing a metal element having a melting point lower than that of copper. The other is made of a material that does not contain any metal element and has a melting point lower than that of copper.
［作用コ
本発明における真空しゃ断器は、アーク電流が低下して
ｌＯアンペア以下になっても、銅より融点の低い金属を
含む一方の電極から低融点金属の蒸気が容易に放出され
る。したがって、アークが不安定になったり、電流さい
新現象が生じることがなく、電流零点までアークが維持
される。一方、他方の電極は、銅より融点が低い金属を
含まないので、低融点金属の蒸発はなく、電極のアーク
駆動力は大きく低下することなく維持され、安定した電
流しゃ断性能力！保持される。[Function] In the vacuum breaker of the present invention, even if the arc current decreases to 10 amperes or less, the vapor of the low melting point metal is easily released from one electrode containing a metal with a lower melting point than copper. Therefore, the arc does not become unstable or new current phenomena occur, and the arc is maintained up to the current zero point. On the other hand, since the other electrode does not contain any metal with a melting point lower than that of copper, there is no evaporation of the low melting point metal, and the arc driving force of the electrode is maintained without significantly decreasing, resulting in stable current interrupting ability! Retained.
［実施例］ 以下、本発明の実施例を第１図に基づいて説明する。[Example] Embodiments of the present invention will be described below with reference to FIG.
第１図に示すように、絶縁物円筒（１）と、この円筒（
１）の両端に設けられた端板（２）、（３）により真空
容器が構成され、少なくとも１０ ｍｍＨｇ以下に排
気されている。この真空容器内・には接離可能な一対の
電極（４） 、 （５）が配置されており、この電極（
４）。As shown in Figure 1, an insulator cylinder (1) and this cylinder (
The end plates (2) and (3) provided at both ends of 1) constitute a vacuum container, which is evacuated to at least 10 mmHg or less. A pair of electrodes (4) and (5) that can be brought into and out of contact with each other are arranged inside this vacuum container.
4).
（５）を包囲するようにアークシールド（１０）が設け
られている。そして、固定電極（４）は、銅より融点の
低いビスマスを含む金属材料で形成され、端板（２）を
貫通するｆ４製の固定導電棒（６）を介して容器外部に
導出され、可動電極（５）は、銅より融点の低い金属を
含まない金属材料で形成され、端板（３）の開口を貫通
する銅製の可動導電棒（７）により外部に導出されてい
る。そして、真空容器内を気密に保ちつつ、蒸気可動導
電棒（７）を移動可能に支持するため、その一端が蒸気
可動導電棒（７）に、゛他端が端板（３）の開口周囲に
固着されたベローズ（８）が設けられており、さらにベ
ローズ（８）はベローズカバー（９）によりアークから
保護されている。An arc shield (10) is provided to surround (5). The fixed electrode (4) is made of a metal material containing bismuth, which has a melting point lower than that of copper, and is led out to the outside of the container via a fixed conductive rod (6) made of F4 that penetrates the end plate (2). The electrode (5) is formed of a metal material that does not contain a metal with a melting point lower than that of copper, and is led out to the outside by a movable conductive rod (7) made of copper that passes through an opening in the end plate (3). In order to movably support the steam movable conductive rod (7) while keeping the inside of the vacuum container airtight, one end of the steam movable conductive rod (7) is attached, and the other end is placed around the opening of the end plate (3). There is a bellows (8) fixed to the bellows (8), which is further protected from arcing by a bellows cover (9).
上記のように構成された真空しゃ断器は、電流しゃ断時
の電極間のアーク電流が数アンペア程度になっても、固
定電極（４）から低融点金属すなわちビスマスの蒸気が
容易に放出されるので、アークは電流零点まで維持され
る。一方、可動型４！ｉ （５）は銅より融点が低い金
属を含まないので、電極表面に低融点金属の蒸気が滞留
することがなく電極の有するアーク駆動力は低下するこ
となく維持され、電流しゃ断性能は高く保持される。In the vacuum breaker configured as described above, even if the arc current between the electrodes reaches several amperes during current interruption, the vapor of the low melting point metal, ie, bismuth, is easily released from the fixed electrode (4). , the arc is maintained until the current zero point. On the other hand, movable type 4! i (5) does not contain metals with a lower melting point than copper, so the vapor of the low melting point metal does not accumulate on the electrode surface, the arc driving force of the electrode is maintained without decreasing, and the current interrupting performance is maintained high. be done.
上記の実施例では固定電極（４）を銅より融点の低い金
属を含む金属材料で形成したが、固定電極（５）を銅よ
り融点の低い金属を含まない金属材料で形成してもよく
、この場合は可動電極（４）を銅より融点の低い金属を
含む金属材料で形成すればよい。In the above embodiment, the fixed electrode (4) was formed of a metal material containing a metal with a melting point lower than that of copper, but the fixed electrode (5) may be formed of a metal material that does not contain a metal with a melting point lower than that of copper. In this case, the movable electrode (4) may be formed of a metal material containing a metal whose melting point is lower than that of copper.
また銅より融点の低い金属としては上記のビスマス（Ｂ
ｉ）の他に、例えばテルル（Ｔｅ）、アンチモン（ｓｂ
）等があげられる。Also, as a metal with a lower melting point than copper, the above-mentioned bismuth (B
In addition to i), for example, tellurium (Te), antimony (sb
) etc.
さらに上記の銅より融点の低い金属は必ずしも金属状態
で含まれている必要はなく、例えば酸化物、窒化物、炭
化物として含まれていてもよい。Furthermore, the above-mentioned metals having a lower melting point than copper do not necessarily need to be contained in a metallic state, and may be contained, for example, in the form of oxides, nitrides, or carbides.
［発明の効果］
本発明の真空しゃ断器は、接離可能な一対の電極の一方
を銅より融点の低い金属元素を含む材料で形成し、他方
を銅より融点の低い金属元素を含まない材料で形成して
いるので、電流さい新現象を防止するとともに、電流し
ゃ断性能を高く維持することができる。[Effects of the Invention] In the vacuum breaker of the present invention, one of the pair of detachable electrodes is formed of a material containing a metal element with a melting point lower than that of copper, and the other is formed of a material containing no metal element with a melting point lower than that of copper. , it is possible to prevent current leakage phenomena and maintain high current interrupting performance.
第１図は、本発明にかかる真空しゃ断器の一実施例を示
す断面図である。
図において、（１）は絶縁物円筒、（４）は固定電極、
（５）は可動電極である。FIG. 1 is a sectional view showing an embodiment of a vacuum breaker according to the present invention. In the figure, (1) is an insulating cylinder, (4) is a fixed electrode,
(5) is a movable electrode.
Claims (1)
な一対の電極とを具備する真空しゃ断器において、 上記電極の一方が、銅より融点の低い金属元素を含む材
料で形成され、 他方の電極が、銅より融点の低い金属元素を含まない材
料で形成されていること を特徴とする真空しゃ断器。(1) In a vacuum breaker comprising a vacuum container and a pair of electrodes housed in the vacuum container that can be made into or out of contact, one of the electrodes is formed of a material containing a metal element with a melting point lower than that of copper, A vacuum breaker characterized in that the other electrode is formed of a material that does not contain a metal element that has a melting point lower than that of copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4996386A JPS62206725A (en) | 1986-03-05 | 1986-03-05 | Vacuum breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4996386A JPS62206725A (en) | 1986-03-05 | 1986-03-05 | Vacuum breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62206725A true JPS62206725A (en) | 1987-09-11 |
Family
ID=12845677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4996386A Pending JPS62206725A (en) | 1986-03-05 | 1986-03-05 | Vacuum breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62206725A (en) |
-
1986
- 1986-03-05 JP JP4996386A patent/JPS62206725A/en active Pending
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