JP2918752B2 - Switch - Google Patents
SwitchInfo
- Publication number
- JP2918752B2 JP2918752B2 JP30968392A JP30968392A JP2918752B2 JP 2918752 B2 JP2918752 B2 JP 2918752B2 JP 30968392 A JP30968392 A JP 30968392A JP 30968392 A JP30968392 A JP 30968392A JP 2918752 B2 JP2918752 B2 JP 2918752B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- contact
- movable contact
- side plate
- extinguishing
- 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 - Fee Related
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、例えば、回路遮断器
や限流器または電磁接触器など、電流遮断時に容器内で
アークが発生する開閉器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch, such as a circuit breaker, a current limiter, or an electromagnetic contactor, which generates an arc in a container when current is interrupted.
【0002】[0002]
【従来の技術】図39は従来の開閉器として例えば回路
遮断器の開成時状態を示す側面図、図40は図39の回
路遮断器の接点開離直後の状態を示す側面図、図41は
図40の回路遮断器における可動接触子の最大開離状態
を示す側面図である。図において、1は回路遮断器の可
動接触子であり、この可動接触子1は基部の回動支点
(回動中心)14(図40,図41参照)を中心にして
回動するように支持されている。2は前記可動接触子1
の一端(自由端部下面)に固着された可動接点、3は前
記可動接触子1の回動により可動接点2と接離する固定
接点、4はその固定接点3を一端に有する固定接触子で
あり、この固定接触子4の形状構成については後述す
る。5は前記固定接触子4の他端に接続された電源側の
端子部である。6は消弧板で、前記可動接点2と前記固
定接点3との開離時にそれらの接点間に発生するアーク
を引き延ばして冷却すべく機能する。7は前記消弧板6
を保持する消弧側板である。8は前記可動接触子1を回
動させる機構部であり、この機構部8は、電流検出部
(図示せず)を内蔵し、該電流検出部が短絡電流を検知
することによって作動するようになっている。9は前記
機構部8を手動で操作するためのハンドル、10は負荷
側の端子部、11はその端子部10を前記可動接触子1
に接続する導体である。12はこれらの回路遮断器構成
部品を収納する容器、13はその容器12の壁部に設け
られた排気孔である。2. Description of the Related Art FIG. 39 is a side view showing a conventional switch, for example, when a circuit breaker is opened, FIG. 40 is a side view showing a state immediately after the contact of the circuit breaker shown in FIG. 39 is opened, and FIG. FIG. 41 is a side view showing the maximum open state of the movable contact in the circuit breaker of FIG. 40. In the drawings, reference numeral 1 denotes a movable contact of a circuit breaker, and the movable contact 1 is supported so as to rotate around a rotation fulcrum (center of rotation) 14 (see FIGS. 40 and 41) of a base. Have been. 2 is the movable contact 1
Are fixed contacts which are fixed to one end (lower surface of the free end), and 3 is a fixed contact which comes into contact with / separates from the movable contact 2 by the rotation of the movable contact 1, and 4 is a fixed contact having the fixed contact 3 at one end. The configuration of the fixed contact 4 will be described later. Reference numeral 5 denotes a power-supply-side terminal connected to the other end of the fixed contact 4. Reference numeral 6 denotes an arc extinguishing plate which functions to extend and cool an arc generated between the movable contact 2 and the fixed contact 3 when the movable contact 2 and the fixed contact 3 are opened. 7 is the arc extinguishing plate 6
This is the arc-extinguishing side plate that holds. Reference numeral 8 denotes a mechanism for rotating the movable contact 1, and this mechanism 8 has a built-in current detection unit (not shown), and the current detection unit operates by detecting a short-circuit current. Has become. 9 is a handle for manually operating the mechanism section 8, 10 is a load side terminal section, and 11 is the terminal section 10 of the movable contact 1
Is a conductor connected to Reference numeral 12 denotes a container for accommodating these circuit breaker components, and reference numeral 13 denotes an exhaust hole provided in a wall of the container 12.
【0003】ここで、前記固定接触子4の形状構成につ
いて説明する。図39〜図41において、前記固定接触
子4は、電源側の端子部5が接続されて水平方向に延び
る導体部4aと、この導体部4aにおける前記端子部5
と反対側の端部に下方へ向け折曲形成された垂直な導体
部4bと、この導体部4bの下端から前記導体部4aと
は反対側の水平方向に延びる段差状下部の導体部4c
と、この導体部4cの先端から垂直方向に立ち上がる導
体部4dと、この導体部4dの上端から前記導体部4a
側に向って水平方向に延びる導体部4eとから成る形状
に一体形成され、前記導体部4e上に固定接点3が設け
られた構成となっている。Here, the configuration of the fixed contact 4 will be described. 39 to 41, the fixed contact 4 includes a conductor 4a connected to the terminal 5 on the power supply side and extending in the horizontal direction, and the terminal 5 in the conductor 4a.
A vertical conductor portion 4b bent downward at the end opposite to the end portion, and a stepped lower conductor portion 4c extending horizontally from the lower end of the conductor portion 4b and opposite to the conductor portion 4a.
A conductor 4d that rises vertically from the tip of the conductor 4c, and the conductor 4a from the upper end of the conductor 4d.
And a conductor portion 4e extending horizontally in the horizontal direction. The fixed contact 3 is provided on the conductor portion 4e.
【0004】このような形状構成の固定接触子4におい
て、段差状下部の導体部4cと固定接点3側とを接続し
ている導体部4dは、固定接点3の位置より可動接触子
1の可動接点2が固着されていない他端部側で且つ端子
部5の反対側に位置し、固定接点3を有する導体部4e
は、端子部5を有する導体部4aと同一水平面上にあっ
て、可動接点2と固定接点3相互の接点閉成時に該接点
接触面の位置より下方に位置している。かかる固定接触
子4は、その全体表面が絶縁されていない素肌露出状態
で使用されている。[0004] In the fixed contact 4 having such a configuration, the conductor 4 d connecting the conductor 4 c at the step-like lower portion and the fixed contact 3 side moves the movable contact 1 from the position of the fixed contact 3. A conductor portion 4e having a fixed contact 3 located on the other end side where the contact 2 is not fixed and opposite to the terminal portion 5;
Is located on the same horizontal plane as the conductor portion 4a having the terminal portion 5, and is located below the position of the contact contact surface when the movable contact 2 and the fixed contact 3 are closed. The fixed contact 4 is used in a bare skin exposed state where the entire surface is not insulated.
【0005】次に動作について説明する。図39の状態
において、固定接触子4の端子部5を電源に接続すると
共に、負荷側の端子部10を負荷に接続する。この状態
において、ハンドル9を矢印B方向に操作すると、機構
部8が動作して可動接触子1が基部の回動支点14(図
40,図41参照)を中心として下降回動することによ
り、可動接点2が固定接点3と接触した接点閉成状態と
なって、電力が電源から負荷に供給される。この状態
で、通電の信頼性を確保するために前記可動接点2は固
定接点3に規定の接触圧力で押えつけられている。Next, the operation will be described. In the state of FIG. 39, the terminal 5 of the fixed contact 4 is connected to a power source, and the terminal 10 on the load side is connected to a load. In this state, when the handle 9 is operated in the direction of arrow B, the mechanism section 8 is operated, and the movable contact 1 is rotated downward about the rotation fulcrum 14 (see FIGS. 40 and 41) of the base. When the movable contact 2 comes into contact with the fixed contact 3 in a closed state, power is supplied from the power supply to the load. In this state, the movable contact 2 is pressed against the fixed contact 3 with a predetermined contact pressure in order to ensure the reliability of energization.
【0006】ここで、回路遮断器より負荷側の回路で短
絡事故などが起こり、回路に大きな短絡電流が流れる
と、この大電流を前記機構部8内の電流検出部が検知し
て前記機構部8を作動させる。これによって、可動接触
子1が接点開離方向に回動することで可動接点2が固定
接点3から開離する。このような接点開離時には、図4
0および図41に示すように、可動接点2と固定接点3
との間にアークAが発生する。Here, when a short-circuit accident or the like occurs in the circuit on the load side of the circuit breaker and a large short-circuit current flows in the circuit, the large current is detected by the current detecting section in the mechanical section 8 and the mechanical section is detected. Activate 8 Thereby, the movable contact 2 is separated from the fixed contact 3 by rotating the movable contact 1 in the contact separating direction. At the time of such contact opening, FIG.
0 and the movable contact 2 and the fixed contact 3 as shown in FIG.
And arc A is generated.
【0007】しかし、通常、短絡電流などの大電流が流
れると、可動接点2と固定接点3の接触面における電磁
反発力が非常に強くなり、前記可動接点2にかかってい
る接触圧力に打ち勝つために、可動接触子1は機構部8
の動作を待たずに接点開離方向に回動する。従って、そ
の回動により、可動接点2と固定接点3の開離が起こ
り、それらの接点2,3間に発生したアークAは、消弧
板6で引き延ばされて冷却される。この結果、アーク抵
抗が上昇し、短絡電流が小さく絞られる限流が起こり、
電流零点で前記アークAは消弧されて電流遮断が完了す
る。However, normally, when a large current such as a short-circuit current flows, the electromagnetic repulsion at the contact surface between the movable contact 2 and the fixed contact 3 becomes very strong, and overcomes the contact pressure applied to the movable contact 2. In addition, the movable contact 1 is
Rotate in the contact opening direction without waiting for the above operation. Accordingly, the rotation causes the movable contact 2 and the fixed contact 3 to be separated from each other, and the arc A generated between the contacts 2 and 3 is extended by the arc-extinguishing plate 6 and cooled. As a result, the arc resistance increases, and a current limit occurs in which the short-circuit current is reduced.
At the current zero point, the arc A is extinguished and the current interruption is completed.
【0008】限流は、回路遮断器の保護機能を向上させ
るために非常に重要であり、限流性能を高めるために
は、上述のようにアーク抵抗を増大させる必要がある。[0008] Current limiting is very important for improving the protection function of a circuit breaker, and in order to improve current limiting performance, it is necessary to increase the arc resistance as described above.
【0009】アーク抵抗を増大させるためにアークを引
き延ばす方法としてよく使われるのは、例えば特開昭6
0−49533号公報や特開平2−68831号公報に
示されているような形状の固定接触子を利用する方法で
ある。これらの公報に示された固定接触子の形状は、図
39〜図41に示した固定接触子4の形状と基本的には
同じである。この固定接触子4による電流経路は、図3
9〜図41において、電源側の端子部5から導体部4
a,4b,4c,4d,4eを順に経て固定接点3に至
る。[0009] As a method of elongating the arc to increase the arc resistance, for example, Japanese Unexamined Patent Publication No.
This method uses a fixed contact having a shape as disclosed in Japanese Patent Application Laid-Open No. 0-49533 and Japanese Patent Application Laid-Open No. 2-68831. The shape of the fixed contact shown in these publications is basically the same as the shape of the fixed contact 4 shown in FIGS. The current path of the fixed contact 4 is shown in FIG.
9 to 41, the terminal portion 5 on the power supply side and the conductor portion 4
a, 4b, 4c, 4d, and 4e, to reach the fixed contact 3 in this order.
【0010】このような電流経路において、固定接触子
4の固定接点3側の電流経路4eに流れる電流がアーク
Aに及ぼす電磁力は、アークAを消弧板6方向へ引き延
ばす力となる。この力はアークAは長く引き延ばしアー
ク電圧を増大させる。また、アークAは消弧板6の冷却
作用によってもアーク電圧が高くなるため限流性能が向
上する。さらに、接点閉成時の可動接触子1に流れる電
流は固定接触子4の電流経路4eに流れる電流と逆方向
であり、大電流遮断時には可動接触子1と固定接触子4
の電流経路4eの間に電流反発力が働く。In such a current path, the electromagnetic force exerted on the arc A by the current flowing through the current path 4e of the fixed contact 4 on the fixed contact 3 side is a force for extending the arc A toward the arc extinguishing plate 6. This force causes arc A to stretch longer and increase the arc voltage. Further, the arc A increases the arc voltage also by the cooling action of the arc extinguishing plate 6, so that the current limiting performance is improved. Further, the current flowing through the movable contact 1 when the contacts are closed is in the opposite direction to the current flowing through the current path 4e of the fixed contact 4, and when the large current is interrupted, the movable contact 1 and the fixed contact 4
Current repulsion acts between the current paths 4e.
【0011】これによって、可動接触子1の開極スピー
ドが増大し、接点間のアークAを早く長くできるため、
アーク電圧も早く増大する。これらの結果、アーク抵抗
はより高くなり限流性能の優れた回路遮断器が得られ
る。As a result, the opening speed of the movable contact 1 can be increased, and the arc A between the contacts can be quickly increased.
The arc voltage also increases quickly. As a result, the arc resistance is higher, and a circuit breaker having excellent current limiting performance can be obtained.
【0012】通常の交流遮断における限流性能を高める
には、上述のようにアーク抵抗を高めることが必要であ
るが、この場合、接点2,3が開離した直後の未だ電流
が最大値になる前に、アーク抵抗を高めなければならな
い。電流が大きくなった後にアーク抵抗を高めても、電
流の慣性効果のためになかなか電流は限流されない。か
えって、大電流で且つ抵抗が高いため、遮断器内で発生
するアークエネルギーが大きくなり、遮断器の損傷が激
しくなるだけである。従って、接点2,3が開離した直
後のアークを強い電磁力で大きく引き延ばし、急激にア
ーク抵抗を高めるような固定接触子形状が必要となる。In order to enhance the current limiting performance in ordinary AC interruption, it is necessary to increase the arc resistance as described above. In this case, however, the current immediately after the contacts 2 and 3 are opened still has a maximum value. Before it can, the arc resistance must be increased. Even if the arc resistance is increased after the current increases, the current is not easily limited due to the inertia effect of the current. On the contrary, since the current is large and the resistance is high, the arc energy generated in the circuit breaker becomes large, and the damage to the circuit breaker only becomes severe. Therefore, it is necessary to have a fixed contact shape that greatly extends the arc immediately after the contacts 2 and 3 are separated by a strong electromagnetic force and sharply increases the arc resistance.
【0013】[0013]
【発明が解決しようとする課題】従来の固定接触子形状
を持つ開閉器は以上のように構成されているので、図4
1に示すように、接点2,3開離直後のアークAを電源
側の端子部5方向に引き延ばす電磁力を発生する固定接
触子4の電流経路は、電源側の端子部5を有する導体部
4aと同一面上で分離した固定接点3側の導体部4eだ
けであり、他の電流経路(導体部)4a,4b,4c,
4dは、全てアークAを前記端子部5と反対側に引き延
ばす電磁力を発生する。何故なら、導体部4a,4cの
電流は固定接点3側の導体部4eと逆方向に流れている
ので、アークAを端子部5の方向と逆方向に引き延ばす
電磁力を発生させる。また、導体部4bの電流は、前記
アークAの電流と逆方向のために反発し合い、導体部4
dの電流は前記アークAの電流と同一方向であって引き
合うため、アークAを端子部5の方向と逆方向に引き延
ばす結果となる。このため、前記電流経路4eが発生す
るアークAを端子部5の方向に引き延ばす電磁力はそれ
以外の電流経路による電流によって打ち消されてしま
う。さらに、前記可動接触子1の全体に亘って回動方向
の電磁力を及ぼすのは、上述のように固定接触子4の電
流経路4eだけであり、他の電流経路4a,4cは可動
接触子1と同じ向きの電流が流れるため、可動接触子1
を閉じる方向の電磁力を及ぼす。電流経路4dに流れる
電流は、可動接触子1の回動中心14側には回動方向の
電磁力を及ぼすが、可動接触子2側では閉じ方向の電磁
力を及ぼす。Since a conventional switch having a fixed contact shape is constructed as described above, FIG.
As shown in FIG. 1, the current path of the fixed contact 4 that generates an electromagnetic force for extending the arc A immediately after the contacts 2 and 3 are opened in the direction of the terminal 5 on the power supply side is a conductor section having the terminal 5 on the power supply side. 4a, only the conductor portion 4e on the fixed contact 3 side separated on the same surface as the other current paths (conductor portions) 4a, 4b, 4c,
4d generates an electromagnetic force for extending the arc A all the way to the side opposite to the terminal portion 5. This is because the current flowing through the conductors 4a and 4c flows in the direction opposite to the direction of the conductor 4e on the fixed contact 3 side, so that an electromagnetic force is generated to extend the arc A in the direction opposite to the direction of the terminal 5. The current of the conductor 4b repels the current of the arc A because of the opposite direction, and the conductor 4b
Since the current d draws in the same direction as the current of the arc A, the arc A is elongated in the direction opposite to the direction of the terminal portion 5. For this reason, the electromagnetic force that extends the arc A generated by the current path 4e in the direction of the terminal portion 5 is canceled by the current flowing through the other current paths. Further, only the current path 4e of the fixed contact 4 exerts the electromagnetic force in the rotational direction over the entire movable contact 1, as described above, and the other current paths 4a and 4c are movable contacts. 1 flows in the same direction as that of the movable contact 1
Exerts electromagnetic force in the closing direction. The current flowing through the current path 4d exerts an electromagnetic force in the rotating direction on the rotating center 14 side of the movable contact 1, but exerts an electromagnetic force in the closing direction on the movable contact 2 side.
【0014】したがって、従来の開閉器に使用されてい
る固定接触子4の形状では、可動接触子1の高速開極の
ために前記固定接触子4に流れる電流の電磁力がアーク
Aを引き延ばすために効果的に作用しないという問題点
があった。また、唯一、可動接触子1の高速開極に寄与
している固定接触子4の電流経路4eの電磁力も前記可
動接触子1が回動するにつれて互いの距離が大きくなる
ため急速に減少して開極速度が低下するという問題点が
あった。Therefore, in the shape of the fixed contact 4 used in the conventional switch, the electromagnetic force of the current flowing through the fixed contact 4 extends the arc A due to the high-speed opening of the movable contact 1. There is a problem that it does not work effectively. Also, only the electromagnetic force of the current path 4e of the fixed contact 4 contributing to the high-speed opening of the movable contact 1 rapidly decreases because the distance between the movable contacts 1 increases as the movable contact 1 rotates. There was a problem that the opening speed was reduced.
【0015】このように従来の固定接触子の形状では、
この固定接触子4に流れる電磁力がアークAを引き延ば
すためや可動接触子1の開極速度を高めるために効果的
に使えず、このため、必要な限流性能が得られないとい
う問題点があった。As described above, in the shape of the conventional fixed contact,
The electromagnetic force flowing through the fixed contact 4 cannot be effectively used to extend the arc A or to increase the opening speed of the movable contact 1, so that the required current limiting performance cannot be obtained. there were.
【0016】請求項1の発明は上記のような問題点を解
消するためになされたもので、開極直後のアークに対し
て強力な駆動磁場を印加し、消弧側板の作用を大きく発
揮させることができ、開成状態ではアークを強制的に冷
却することができて、そのアーク冷却効果の向上が図れ
る限流遮断性能の優れた開閉器を得ることを目的とす
る。The first aspect of the present invention has been made to solve the above-mentioned problems, and a strong driving magnetic field is applied to an arc immediately after the opening of the electrode, so that the function of the arc-extinguishing side plate is greatly exerted. It is an object of the present invention to obtain a switch having excellent current limiting interruption performance capable of forcibly cooling an arc in an open state and improving the arc cooling effect.
【0017】請求項2の発明は、接点開成状態でアーク
を強制的に冷却できると共に、消弧側板の表面絶縁が劣
化しても固定接点と可動接点間の絶縁耐力を大きくで
き、優れた限流遮断性能を持つ開閉器を得ることを目的
とする。According to a second aspect of the present invention, when the contact is opened,
And the surface insulation of the arc-extinguishing side plate is poor.
The dielectric strength between the fixed and movable contacts
And to obtain a switch with excellent current limiting performance .
【0018】請求項3の発明は、接点開成状態でアーク
を強制的に冷却できると共に、可動接触子の開極速度を
増大でき、限流遮断性能の優れた開閉器を得ることを目
的とする。According to a third aspect of the present invention, when the contact is opened,
And the opening speed of the movable contact
An object of the present invention is to obtain a switch which can be increased and has excellent current limiting performance .
【0019】請求項4の発明は、接点開成状態でアーク
を強制的に冷却できると共に、消弧側板に掛かる力を低
減できて消弧側板の機械的強度をそれほど必要とせずに
優れた限流性能を維持できる開閉器を得ることを目的と
する。According to a fourth aspect of the present invention, when the contact is opened,
And the force applied to the arc-extinguishing side plate is reduced.
It is possible to reduce the mechanical strength of the arc-extinguishing side plate without much need
An object of the present invention is to obtain a switch capable of maintaining excellent current limiting performance .
【0020】請求項5の発明は、接点開成状態でアーク
を強制的に冷却できると共に、優れた限流遮断性能を維
持できる開閉器を得ることを目的とする。According to a fifth aspect of the present invention, when the contact is opened,
Cooling while maintaining excellent current limiting performance.
The purpose is to obtain a switch that can be held.
【0021】[0021]
【0022】[0022]
【0023】[0023]
【0024】[0024]
【0025】[0025]
【課題を解決するための手段】請求項1に係る開閉器
は、一端部に可動接点を有する可動接触子と、この可動
接触子の開閉動作で前記可動接点と接離可能な固定接点
を一端部に有する固定接触子とを備え、この固定接触子
に電源系統を接続する開閉器において、前記接点の開閉
方向を上下方向とした時、前記固定接触子を、前記電源
系統に接続する第1導体部、前記固定接点を有する第2
導体部、及びそれらの第1導体部と第2導体部を上下方
向に接続する第3導体部とで構成し、前記第3導体部を
前記固定接点の位置より可動接触子の可動接点が設けら
れていない他端部側で且つ前記電源系統の反対側に配置
し、前記第1導体部は、前記接点閉成時に該接点接触面
より上方に配置すると共に、前記接点開成時に前記可動
接点の接触面より下方に配置し、前記接点開成時に前記
可動接点表面から見渡せる前記第1導体部の部位を絶縁
物で被覆すると共に、前記可動接触子が開閉時の可動接
点の軌跡を含む平面の両側に消弧側板を配置し、これら
の消弧側板の少なくとも一方を前記平面と前記第1導体
部の平面に対応する部分の間に設置したものである。According to a first aspect of the present invention, there is provided a switch including a movable contact having a movable contact at one end, and a fixed contact which can be separated from and separated from the movable contact by opening and closing the movable contact. A fixed contact provided in a portion, and a switch for connecting a power supply system to the fixed contact, wherein when the contact is opened and closed in a vertical direction, the first contact connects the fixed contact to the power supply system. A second portion having a conductor portion and the fixed contact;
A conductor portion and a third conductor portion connecting the first conductor portion and the second conductor portion in the vertical direction, wherein the third conductor portion is provided with a movable contact of a movable contact from a position of the fixed contact. The first conductor portion is disposed above the contact contact surface when the contact is closed, and the movable contact of the movable contact is disposed when the contact is opened. A first conductor portion that is disposed below a contact surface and that can be seen from the surface of the movable contact when the contact is opened, is covered with an insulating material, and both sides of a plane including the locus of the movable contact when the movable contact is opened and closed; The arc-extinguishing side plate is disposed at least one of these arc-extinguishing side plates is disposed between the plane corresponding to the plane of the first conductor portion.
【0026】請求項2に係る開閉器は、前記可動接触子
の開成状態において、前記可動接点が前記消弧側板の上
方に突出するように構成したものである。According to a second aspect of the present invention , in the switch, the movable contact is provided.
In the open state of the above, the movable contact is located above the arc-extinguishing side plate.
It is configured to protrude in the direction .
【0027】請求項3に係る開閉器は、前記消弧側板
を、該消弧側板の上辺が前記第1導体部の高さ範囲を越
えないように形成したものである。According to a third aspect of the present invention , the switch includes the arc-extinguishing side plate.
The upper side of the arc-extinguishing side plate exceeds the height range of the first conductor.
It was formed so that it could not be obtained .
【0028】請求項4に係る開閉器は、前記消弧側板の
上辺が前記第1導体部の高さ範囲を越えず、且つ、前記
消弧側板の下端が前記固定接点より上方に位置するよう
に構成したものである。A switch according to a fourth aspect of the present invention is the switch of the arc extinguishing side plate.
The upper side does not exceed the height range of the first conductor portion, and
The lower end of the arc-extinguishing side plate is positioned above the fixed contact.
It is what was constituted .
【0029】請求項5に係る開閉器は、前記両側の消弧
側板に、該消弧側板間の距離を幅とする時、これらの消
弧側板が前記可動接点の軌跡より電源系統側では前記軌
跡に対向する部分の幅より狭い幅を持つ部分を設けたも
のである。According to a fifth aspect of the present invention , in the switch, the arc extinguishing on both sides is performed.
When the distance between the arc extinguishing side plates is set to be a width,
When the arc side plate is closer to the power supply system than the path of the movable contact,
A portion having a width smaller than the width of the portion facing the mark is provided .
【0030】[0030]
【0031】[0031]
【0032】[0032]
【0033】[0033]
【0034】[0034]
【作用】請求項1の発明における開閉器は、接点間に発
生したアークは消弧側板の幅方向の広がりが両側の消弧
側板によって阻まれ、第1導体部のアークに対向する部
分が保護され、前記幅方向と直角方向のうち固定接点よ
り電源系統側とは逆方向への広がりは開極初期において
固定接触子を構成する導体部を流れる全ての電流による
電磁力で阻まれる。この結果、前記アークは電源系統方
向に延びるほかないため、アーク電圧は急激に増大す
る。可動接触子が開成した時は可動接点から噴出するア
ークのホットガスが接点表面から見渡せる第1導体部の
絶縁されている部位に衝突して強制的に冷却されること
により高いアーク電圧を発生、維持することができる。In the switch according to the first aspect of the present invention, the arc generated between the contacts is prevented from spreading in the width direction of the arc extinguishing side plate by the arc extinguishing side plates on both sides, and a portion of the first conductor portion facing the arc is protected. The spread in the direction perpendicular to the width direction in the direction opposite to the power supply system side in the direction perpendicular to the width direction is prevented by the electromagnetic force caused by all the currents flowing through the conductors constituting the fixed contact at the initial stage of opening. As a result, the arc only extends in the direction of the power supply system, so that the arc voltage sharply increases. When the movable contact is opened, a high arc voltage is generated by the hot gas of the arc erupting from the movable contact colliding with the insulated portion of the first conductor portion that can be seen from the contact surface and being forcibly cooled, Can be maintained.
【0035】請求項2の発明における開閉器は、可動接
触子が開成時には可動接点が消弧側板より上方に突出す
るため可動接点と消弧側板の間の絶縁距離が大きく確保
できるため、遮断後期に絶縁破壊が起こらない。 The switch according to the second aspect of the present invention has a movable contact.
When the contact is opened, the movable contact projects above the arc-extinguishing side plate
Large insulation distance between the movable contact and the arc-extinguishing side plate
As a result, insulation breakdown does not occur in the latter half of the interruption.
【0036】請求項3の発明における開閉器は、遮断後
半の可動接点が第1導体部より上方に出た後は消弧側板
にアークが狭められていないため、アークによる消弧側
板からの放出ガスがなく、圧力上昇が抑えられる。 The switch in the third aspect of the present invention, after blocking
After the half movable contact comes out above the first conductor, the arc-extinguishing side plate
Because the arc is not narrowed, the arc extinguishing side
There is no gas released from the plate, and pressure rise is suppressed.
【0037】請求項4の発明における開閉器は、消弧側
板の下端が固定接点より上方にあるので、遮断時のアー
クによる第1導体部より下方空間の発生圧力が逃げ易
く、さらに遮断後半の可動接点が第1導体部より上方に
出た後は消弧側板にアークが狭められていないため、ア
ークによる消弧側板からの放出ガスがなく、圧力上昇が
抑えられる。 According to a fourth aspect of the present invention, the switch is provided on the arc extinguishing side.
Since the lower end of the plate is above the fixed contacts,
The pressure generated in the space below the first conductor due to cracks can easily escape
In addition, the movable contact in the latter half of breaking is higher than the first conductor.
After exiting, the arc is not narrowed to the arc-extinguishing side plate.
No gas is released from the arc-extinguishing side plate due to
Can be suppressed.
【0038】請求項5の発明における開閉器は、固定接
点と可動接点との間における消弧側板の幅より電源系統
方向における消弧側板間の幅が狭いので、その狭い接点
間にアークが押し込まれ該アークの冷却効果が向上す
る。 The switch according to the fifth aspect of the present invention has a fixed connection.
Power supply system based on the width of the arc-extinguishing side plate between the point and the movable contact
The narrow width between the arc-extinguishing side plates in the direction
An arc is pushed in between and the cooling effect of the arc is improved.
You.
【0039】[0039]
【0040】[0040]
【0041】[0041]
【0042】[0042]
【0043】[0043]
【実施例】実施例1. 以下、この発明の一実施例を図について説明する。図1
は請求項1の発明に対応した一実施例による開閉器とし
て容器を断面した回路遮断器の閉成状態を示す消弧部の
側面図、図2は図1の回路遮断器の開成状態を示す側面
図、図3は図1および図2における消弧側板を含む固定
接触子の平面図、図4は図3の正面図、図5は図3の斜
視図であり、図39〜図41と同一または相当部分には
同一符号を付して重複説明を省略する。図において、4
は固定接触子で、第1導体部4aと第2導体部4eと第
3導体部4dとから構成され、前記第2導体部4e上に
固定接点3を有している。[Embodiment 1] An embodiment of the present invention will be described below with reference to the drawings. FIG.
FIG. 2 is a side view of an arc extinguishing section showing a closed state of a circuit breaker in which a container is cross-sectioned as a switch according to an embodiment of the present invention, and FIG. 2 shows an opened state of the circuit breaker of FIG. to a side view, FIG. 3 FIG. 1 and a plan view of a fixed contact including extinguishing side plate in FIG. 2, FIG. 4 is a front view of FIG. 3, FIG. 5 is a perspective view of FIG. 3, FIGS. 39 The same or corresponding parts as in FIG. In the figure, 4
Is a fixed contact, which is composed of a first conductor 4a, a second conductor 4e, and a third conductor 4d, and has a fixed contact 3 on the second conductor 4e.
【0044】更に詳しく述べると、図1の接点閉成状態
において、可動接触子1の可動接点2が固定接点3から
開離する方向を上方とした時、前記固定接触子4は、電
源系統の端子部5が接続されて水平方向に延びる第1導
体部4aと、この第1導体部4aの下方に離間位置した
第2導体部4eと、この第2導体部4eと前記第1導体
部4aを前記端子部5の反対側で上下方向に接続してい
る第3導体部4dとから成る形状に一体形成され、前記
第2導体部4e上に固定接点3を固着して該固定接点3
を第1導体部4aの下方に位置させた構成となってい
る。More specifically, in the contact closed state of FIG. 1, when the direction in which the movable contact 2 of the movable contact 1 is separated from the fixed contact 3 is upward, the fixed contact 4 is connected to the power supply system. A first conductor portion 4a extending in the horizontal direction to which the terminal portion 5 is connected; a second conductor portion 4e spaced below the first conductor portion 4a; a second conductor portion 4e and the first conductor portion 4a And a third conductor portion 4d vertically connected to the opposite side of the terminal portion 5 to form a fixed contact 3 fixed on the second conductor portion 4e.
Are located below the first conductor portion 4a.
【0045】そして、前記固定接触子4は、固定接点3
の位置より可動接触子1の可動接点2が固着されていな
い他端側で、且つ、前記端子部5の反対側(可動接触子
1の回動支点14側)に第3導体部4dが位置する向き
として容器12に取付けセットされている。この場合、
第1導体部4aは、固定接点3に可動接点2が接触した
接点閉成時に該接点接触面より上方に全て位置し、且
つ、接点開成時においても可動接触子1の上方に位置し
ている。The fixed contacts 4 are fixed contacts 3
The third conductor portion 4d is located on the other end side of the movable contact 1 to which the movable contact 2 is not fixed and on the opposite side of the terminal portion 5 (on the side of the rotation fulcrum 14 of the movable contact 1). It is attached and set to the container 12 as the orientation to be performed. in this case,
The first conductor portion 4a is entirely located above the contact contact surface when the movable contact 2 contacts the fixed contact 3 when the contact is closed, and is also located above the movable contact 1 when the contact is opened. .
【0046】ここで、前記可動接触子1と前記固定接触
子4との関連構成について一層詳しく説明する。まず、
固定接触子4は、第1導体部4aと第2導体部4eと第
3導体部4dとによって略U字状に一体形成され、その
U字状の一端である前記第1導体部4aの電源系統接続
側の端部に電源側の端子部5が接続されている。また、
これと反対側の端部となるU字形状の内側、即ち、前記
第2導体部4eの上面部に固定接点3が固着されてい
る。さらに、前記固定接触子4において、前記固定接点
3の固着面より上方に位置する接続導体部(第1導体部
4aと第3導体部4d)には図3〜図5に示すようにス
リット40が設けられている。Here, the structure related to the movable contact 1 and the fixed contact 4 will be described in more detail. First,
The fixed contact 4 is integrally formed in a substantially U shape by a first conductor portion 4a, a second conductor portion 4e, and a third conductor portion 4d, and a power supply of the first conductor portion 4a, which is one end of the U shape. The terminal 5 on the power supply side is connected to the end on the system connection side. Also,
The fixed contact 3 is fixed to the inside of the U-shape that is the opposite end, that is, to the upper surface of the second conductor 4e. Further, in the fixed contact 4, the connection conductors (the first conductor 4a and the third conductor 4d) located above the fixed surface of the fixed contact 3 are provided with slits 40 as shown in FIGS. Is provided.
【0047】このスリット40は、前記第2導体部4e
上の固定接点3に対する可動接触子1の開閉動作を妨げ
ないようにするためのものである。The slit 40 is formed in the second conductor 4e.
This is to prevent opening / closing operation of the movable contact 1 with respect to the upper fixed contact 3.
【0048】かかる固定接触子4の第3導体部4dの高
さ範囲において、この第3導体部4dの前記スリット4
0と対向する外方位置に可動接触子1の回動中心14を
配置している。これにより、前記可動接触子1は、前記
スリット40を介して接点開閉方向に回動するようにな
っている。In the height range of the third conductor 4d of the fixed contact 4, the slit 4 of the third conductor 4d
The center of rotation 14 of the movable contact 1 is arranged at an outer position opposite to 0. This allows the movable contact 1 to rotate in the contact opening / closing direction via the slit 40.
【0049】また、前記固定接触子4における前記スリ
ット40の内部両側には左右2枚の消弧側板7が配置さ
れている。これらの消弧側板7は、前記スリット40の
内部両側で前記可動接触子1の開閉動作時の軌跡面を挟
む間隔で平行し、この平行間隔の状態で第1導体部4a
の上方に立ち上がっている。Further, two arc-extinguishing side plates 7 on the left and right sides are arranged on both sides inside the slit 40 in the fixed contact 4. These arc-extinguishing side plates 7 are parallel to each other on both sides inside the slit 40 so as to sandwich a trajectory surface when the movable contactor 1 is opened and closed, and the first conductor 4 a
Standing above.
【0050】このように消弧側板7が設けられた固定接
触子4において、第1導体部4aのスリット40の内面
と、前記第1導体部4aにおける消弧側板7の外側に位
置した部位の上面部分とは、前記消弧側板7によって可
動接点2の表面から隔てられている。これ以外の可動接
点2の表面から見渡せる第1導体部4aの部分、すなわ
ち、第1導体部4aにおけるスリット40の端子部5側
の内面および上面は絶縁物15で覆われている。この絶
縁物15は、第1導体部4aの上面を覆う絶縁物15a
と、スリット40の内面を覆う絶縁物15bとから成っ
ている。In the fixed contact 4 provided with the arc extinguishing side plate 7 as described above, the inner surface of the slit 40 of the first conductor portion 4a and the portion of the first conductor portion 4a located outside the arc extinguishing side plate 7 are formed. The upper surface is separated from the surface of the movable contact 2 by the arc-extinguishing side plate 7. The other portion of the first conductor portion 4a that can be seen from the surface of the movable contact 2, that is, the inner surface and the upper surface of the slit 40 in the first conductor portion 4a on the terminal portion 5 side are covered with the insulator 15. The insulator 15 covers the upper surface of the first conductor portion 4a.
And an insulator 15b that covers the inner surface of the slit 40.
【0051】なお、図1および図2においては、図39
に示された機構部8および操作ハンドル9等を省略して
いる。In FIGS. 1 and 2, FIG.
Are omitted from the mechanism section 8 and the operation handle 9 shown in FIG.
【0052】次に動作について説明する。短絡電流など
の大電流が流れると、機構部の動作を待たずに可動接触
子1が回動して可動接点2と固定接点3とが開離し、こ
れらの接点2,3間にアークAが発生することは従来と
同様である。図6は接点開離直後の状態を示す動作説明
図、図7は図6のA−A線断面図である。このような接
点開離直後の状態では、可動接点2の接触面が未だ固定
接触子4の第1導体部4aより下方にある。ここで、矢
印は電流を示す。Next, the operation will be described. When a large current such as a short-circuit current flows, the movable contact 1 rotates without waiting for the operation of the mechanism, and the movable contact 2 and the fixed contact 3 are separated from each other. What happens is the same as in the prior art. FIG. 6 is an operation explanatory view showing a state immediately after the contact is separated, and FIG. 7 is a sectional view taken along line AA of FIG. In such a state immediately after the contact is separated, the contact surface of the movable contact 2 is still below the first conductor 4a of the fixed contact 4. Here, the arrows indicate the current.
【0053】この状態において、端子部5から固定接触
子4の第1導体部4aまでで構成される電流経路は、全
てアークAの上方にある。この結果、その電流経路が発
生するアークAに作用する電磁力は、アークAを端子部
5側に引き延ばす力となる。In this state, the current path formed from the terminal portion 5 to the first conductor portion 4a of the fixed contact 4 is all above the arc A. As a result, the electromagnetic force acting on the arc A generated by the current path becomes a force for extending the arc A to the terminal portion 5 side.
【0054】また、固定接触子4の第3導体部4dを流
れる電流はアークAの電流と逆方向になるので、前記第
3導体部4dを流れる電流による電磁力も端子部5側に
引き延ばす力となる。Since the current flowing through the third conductor portion 4d of the fixed contact 4 is in the opposite direction to the current of the arc A, the electromagnetic force due to the current flowing through the third conductor portion 4d is also reduced by the force that extends to the terminal portion 5 side. Become.
【0055】従って、前記固定接触子4に流れる電流が
発生する電磁力は、全てアークAを端子部5側に引き延
ばす力Fmとなり、非常に強大なアーク駆動磁場が得ら
れることとなる。Accordingly, the electromagnetic force generated by the current flowing through the fixed contact 4 is all the force Fm for extending the arc A to the terminal portion 5, and a very strong arc driving magnetic field is obtained.
【0056】ここで、図7に示すように、可動接点2と
固定接点3との間に発生したアークAは左右の消弧側板
7によって挟まれている。このため、アークAは両側に
広がらず、この方向の断面積が絞られる。一方、図6に
示したようにアークAに対して端子部5方向の強大な電
磁力Fmが働くため、可動接点2と固定接点3との間の
アークAは端子部5とは逆方向に広がることはない。Here, as shown in FIG. 7, the arc A generated between the movable contact 2 and the fixed contact 3 is sandwiched between the left and right arc-extinguishing side plates 7. Therefore, the arc A does not spread to both sides, and the cross-sectional area in this direction is reduced. On the other hand, as shown in FIG. 6, since a strong electromagnetic force Fm acts on the arc A in the direction of the terminal 5, the arc A between the movable contact 2 and the fixed contact 3 flows in the opposite direction to the terminal 5. It does not spread.
【0057】すなわち、いわば電磁的な壁によって消弧
側板7によるアークAの断面積を絞る作用が効果的に行
われるようになる。また、消弧側板7に触れている部分
から熱が奪われるため、アークAは冷却される。さら
に、上述の如く消弧側板7によってアークAが両側から
挟まれるため、アーク発生領域の圧力が上昇し、この圧
力で可動接点2が強制的に押し上げられることにより、
可動接触子1の開極速度が増大する。That is, the effect of narrowing the cross-sectional area of the arc A by the arc extinguishing side plate 7 is effectively performed by the electromagnetic wall. In addition, since the heat is removed from the portion touching the arc extinguishing side plate 7, the arc A is cooled. Further, since the arc A is sandwiched from both sides by the arc-extinguishing side plate 7 as described above, the pressure in the arc generating region rises, and the movable contact 2 is forcibly pushed up by this pressure.
The opening speed of the movable contact 1 increases.
【0058】これらの結果、接点開離直後のアークA
は、強力に引き延ばされ、かつ断面積が絞られて冷却さ
れると共に、接点2,3間の距離も早く大きくなるた
め、アーク電圧が急激に高くなる。As a result, arc A immediately after the contact was opened
Is strongly stretched, the cross-sectional area is reduced and cooled, and the distance between the contacts 2 and 3 increases rapidly, so that the arc voltage sharply increases.
【0059】図8は図6における可動接触子が最大開離
した状態を示す側面図である。短絡電流のような大電流
アークでは、接点表面のアークの足から接点表面に垂直
方向に接点が蒸発した金属蒸気流が噴出し、この蒸気流
がアークAの主構成物であることは知られている。FIG. 8 is a side view showing a state in which the movable contact in FIG. 6 is maximally separated. It is known that in a high-current arc such as a short-circuit current, a metal vapor stream in which contacts evaporate in a direction perpendicular to the contact surface is ejected from the foot of the arc on the contact surface, and this vapor stream is a main component of the arc A. ing.
【0060】図8に示すように、可動接点2の表面が面
している第1導体部4aは絶縁物15で絶縁されている
ため、可動接点2の表面から噴出する金属蒸気は絶縁物
15に衝突して冷却され、アーク電圧が高まる。As shown in FIG. 8, since the first conductor 4a facing the surface of the movable contact 2 is insulated by the insulator 15, the metal vapor ejected from the surface of the movable contact 2 is And the arc voltage rises.
【0061】また、固定接触子4の第1導体部4a下方
のアークAに対しては、強力なアーク駆動磁場による電
磁力Fmが作用しており、第1導体部4aのスリット4
0部分においても以下のようにアーク駆動磁場が存在す
る。An electromagnetic force Fm due to a strong arc driving magnetic field acts on the arc A below the first conductor portion 4a of the fixed contact 4 so that the slit 4
The arc driving magnetic field also exists in the 0 part as follows.
【0062】図9は図8のB−B線断面図であり、消弧
側板7は省略した。図において、41はスリット40を
挟む左右両側の第1導体部4aおよび第2導体部4eの
各断面の重心である。図10は理論計算で求めた固定接
触子4を流れる電流が作る図9のZ軸上での磁場強度分
布であり、正方向の磁場がアークAを端子部5側に引き
延ばす磁場成分(以下、アーク駆動磁場と呼ぶ)であ
る。図9で示すように、第1導体部4eは可動接触子1
が回動する平面から左右にずれた所に位置する。FIG. 9 is a sectional view taken along the line BB of FIG. 8, and the arc extinguishing side plate 7 is omitted. In the figure, reference numeral 41 denotes the center of gravity of each cross section of the first conductor portion 4a and the second conductor portion 4e on the left and right sides sandwiching the slit 40. FIG. 10 is a magnetic field intensity distribution on the Z axis of FIG. 9 generated by the current flowing through the fixed contact 4 obtained by the theoretical calculation, and a magnetic field component in which a positive magnetic field extends the arc A toward the terminal 5 (hereinafter, referred to as Arc driving magnetic field). As shown in FIG. 9, the first conductor portion 4e is
Is located right and left from the plane of rotation.
【0063】このような導体配置では、第2導体部4e
および第3導体部4dに流れる電流の影響のために、図
10に示すように、第1導体部4aより上部の空間領域
Z0までアークAを端子部5側に引き延ばすアーク駆動
磁場が存在する。In such a conductor arrangement, the second conductor portion 4e
Due to the influence of the current flowing through the third conductor portion 4d, there is an arc driving magnetic field that extends the arc A toward the terminal portion 5 to the space region Z0 above the first conductor portion 4a, as shown in FIG.
【0064】そのため、アークAは固定接点3から第1
導体部4aのある程度上方まで端子部5方向の強力な電
磁力を受け、スリット40の内面を覆っている絶縁物1
5bに押し付けられて冷却される。この結果、接点開離
直後に急激に高くなったアーク電圧がさらに増大し、且
つ、高いアーク電圧が維持されるので、電流ピークおよ
び通過エネルギーを小さく押えることができ、優れた限
流性能を有した回路遮断器が得られる。Therefore, the arc A is moved from the fixed contact 3 to the first
The insulator 1 covering the inner surface of the slit 40 by receiving a strong electromagnetic force in the direction of the terminal portion 5 to a certain extent above the conductor portion 4a
5b and cooled. As a result, the arc voltage that has increased sharply immediately after the contact is opened further increases, and the high arc voltage is maintained, so that the current peak and the passing energy can be kept small, and excellent current limiting performance is obtained. The obtained circuit breaker is obtained.
【0065】また、この実施例1のように、可動接点2
が開成状態において消弧側板7より上方に飛び出さない
ように構成すると、可動接点2が固定接触子4の第1導
体部4aの上方まで最大開成しても第1導体部4aより
上方のアークAは消弧側板7で挟まれているので、この
部分のアークAに対しても消弧側板7によるアークAの
断面積の制限や冷却効果がある。さらに、可動接触子1
の下方空間の圧力も上昇するため、可動接触子1を持ち
上げる力が働くため、可動接触子1の開極スピードが衰
えず、より限流性能が向上する。Also, as in the first embodiment, the movable contact 2
Is not protruded above the arc-extinguishing side plate 7 in the open state, the arc above the first conductor 4a even when the movable contact 2 is fully opened above the first conductor 4a of the fixed contactor 4. Since A is sandwiched between the arc extinguishing side plates 7, the arc A in this portion also has the effect of limiting the cross-sectional area of the arc A and the effect of cooling. Further, the movable contact 1
Since the pressure in the lower space of the movable contact 1 also increases, a force for lifting the movable contact 1 acts, so that the opening speed of the movable contact 1 does not decrease and the current limiting performance is further improved.
【0066】実施例2.図11はこの発明の実施例2に
よる回路遮断器の電極部を示す側面図である。この実施
例2では、第2導体部4eの部分に流れる電流が実質的
に閉成時の可動接触子1に流れる電流とほぼ平行で逆方
向になるように構成している。このように構成すると、
第2導体部4eの電流経路の電磁力によるアークAを端
子部5側に引き延ばす力が増大し、且つ、閉成時の可動
接触子1と固定接触子4の第2導体部4eとの間に電磁
反発力が働くため、可動接触子1の回動スピードが増大
し、接点開離直後のアーク長が早く大きくなるため、ア
ーク抵抗の立ち上がりが早く、より限流性能が向上す
る。Embodiment 2 FIG. FIG. 11 is a side view showing an electrode portion of a circuit breaker according to Embodiment 2 of the present invention. In the second embodiment, the current flowing through the second conductor portion 4e is substantially parallel to and opposite to the current flowing through the movable contact 1 when closed. With this configuration,
The force for extending the arc A due to the electromagnetic force of the current path of the second conductor portion 4e toward the terminal portion 5 increases, and between the movable contact 1 at the time of closing and the second conductor portion 4e of the fixed contact 4. Since the electromagnetic repulsive force acts on the movable contact 1, the rotating speed of the movable contact 1 increases, and the arc length immediately after the opening of the contact increases, so that the rise of the arc resistance is fast and the current limiting performance is further improved.
【0067】また、この実施例2(図11)のように、
閉成時の可動接触子1の一部1aに流れる電流が、実質
的に固定接触子4の第1導体部4aの下方になる構成に
すると、可動接触子1の一部1aと固定接触子4の第1
導体部4aの電流は互いに同方向となって引き合うた
め、可動接触子1の回動スピードが増加する。この結
果、開極初期の接点間距離、すなわち、アーク長がより
早く長くなるため限流性能が向上する。As in the second embodiment (FIG. 11),
When the current flowing through the portion 1a of the movable contact 1 at the time of closing is substantially below the first conductor portion 4a of the fixed contact 4, the portion 1a of the movable contact 1 and the fixed contact First of 4
Since the currents in the conductors 4a are drawn in the same direction as each other, the rotational speed of the movable contact 1 increases. As a result, the distance between the contacts at the initial stage of opening, that is, the arc length is increased earlier, so that the current limiting performance is improved.
【0068】実施例3.図12(a)はこの発明の実施
例3による回路遮断器の電極部を示す側面図、図12
(b)は図12(a)の可動接触子を省略した正面図で
ある。この実施例3の特徴的なことは、固定接触子4の
第1導体部4aを覆っている絶縁物15の形状構成にあ
る。すなわち、この実施例3による絶縁物15は、第1
導体部4aの表面をスリット40の奥部(端子部5側の
スリット端部)付近で覆っている表面絶縁物15aと、
両側の消弧側板7の相互間でスリット40の内面を覆っ
ている内面絶縁物15bと、この内面絶縁物15bをそ
のまま下方に延ばした垂下延長絶縁物15cとから構成
している。Embodiment 3 FIG. FIG. 12A is a side view showing an electrode portion of a circuit breaker according to Embodiment 3 of the present invention.
13B is a front view of FIG. 12A from which the movable contact is omitted. The characteristic feature of the third embodiment lies in the configuration of the insulator 15 covering the first conductor 4a of the fixed contact 4. That is, the insulator 15 according to the third embodiment is
A surface insulator 15a covering the surface of the conductor portion 4a in the vicinity of a deep portion of the slit 40 (a slit end on the terminal portion 5 side);
An inner insulator 15b covering the inner surface of the slit 40 between the arc extinguishing side plates 7 on both sides and a hanging extension insulator 15c obtained by extending the inner insulator 15b downward as it is.
【0069】このように絶縁物15を構成すると、第1
導体部4aの下方のアークAは、固定接触子4による強
力な磁場と左右の消弧側板7と垂下延長絶縁物15cよ
により四方から囲まれるため、アークAの断面積が非常
に縮小され、消弧側板7と絶縁物15cによる冷却効果
も高くなる。また、接点開極直後においては、第1導体
部4aの下方空間が三方を囲まれているため、圧力が上
昇し易く、この圧力上昇によって可動接触子1を持ち上
げる力が大きくなるため、開極スピードも上昇する。こ
れらの結果、限流性能が一層向上する。When the insulator 15 is configured in this manner, the first
Since the arc A below the conductor portion 4a is surrounded from all sides by the strong magnetic field generated by the fixed contact 4 and the left and right arc-extinguishing side plates 7 and the hanging extension insulator 15c, the cross-sectional area of the arc A is greatly reduced. The cooling effect by the arc-extinguishing side plate 7 and the insulator 15c also increases. Immediately after the contact is opened, the space under the first conductor portion 4a is surrounded on three sides, so that the pressure is likely to increase, and the force for lifting the movable contact 1 is increased by the increase in the pressure. Speed also increases. As a result, the current limiting performance is further improved.
【0070】実施例4.図13はこの発明の実施例4に
よる回路遮断器の電極部を示す側面図である。この実施
例4の特徴的なことは、最大開極時の可動接触子1の先
端部1bが消弧側板7より上方に飛び出す構成としたこ
とにある。Embodiment 4 FIG. FIG. 13 is a side view showing an electrode portion of a circuit breaker according to Embodiment 4 of the present invention. The characteristic feature of the fourth embodiment is that the distal end portion 1b of the movable contact 1 at the time of maximum opening protrudes above the arc-extinguishing side plate 7.
【0071】このように構成すると、負荷電流などの小
電流遮断時において、アークAは消弧側板7の相互間の
空間の圧力が上昇するため、可動接点2の近くのアーク
Aが消弧側板7の外方向の圧力Fpを受けて可動接点2
上のアークAの足が可動接触子1の先端部1bに移り易
くなる。この結果、アークAによる可動接点2の消耗が
低減し、且つ、アークAが長く延びるために遮断性能が
向上する。With this configuration, when a small current such as a load current is interrupted, the pressure of the arc A in the space between the arc extinguishing side plates 7 rises, so that the arc A near the movable contact 2 is moved to the arc extinguishing side plate 7. 7 receives the outward pressure Fp of the movable contact 2
The foot of the upper arc A easily moves to the tip 1 b of the movable contact 1. As a result, wear of the movable contact 2 due to the arc A is reduced, and the breaking performance is improved because the arc A extends for a long time.
【0072】実施例5.図14はこの発明の実施例5に
よる回路遮断器の電極部を示す側面図である。この実施
例5の特徴的なことは、消弧側板7の形状構成にある。
この実施例5による消弧側板7は、固定接触子4の第1
導体部4aより上方の立上り部7aを最大開成時の可動
接点2より可動接触子1の回動中心14側に片寄らせて
形成した構成とし、且つ、開成時の可動接点2から見渡
せる第1導体部4aの上面を絶縁物15の一部15dに
よって絶縁した構成としている。Embodiment 5 FIG. FIG. 14 is a side view showing an electrode portion of a circuit breaker according to Embodiment 5 of the present invention. The feature of the fifth embodiment lies in the configuration of the arc-extinguishing side plate 7.
The arc-extinguishing side plate 7 according to the fifth embodiment is the first
A rising portion 7a above the conductor portion 4a is formed so as to be offset from the movable contact 2 at the time of maximum opening to the rotation center 14 side of the movable contact 1, and a first conductor that can be seen from the movable contact 2 at the time of opening. The upper surface of the portion 4a is configured to be insulated by a part 15d of the insulator 15.
【0073】このような構成にすると、可動接触子1が
最大開成した時に、第1導体部4aの上方では、消弧側
板7で挟まれている空間の圧力FpによりアークAが消
弧側板7に挟まれていない空間、すなわち、より端子部
5側に吹き飛ばされる。また、第1導体部4aの下方空
間からの圧力も加わりアークAは引き延ばされる。この
結果、第1導体部4aより上方のアーク長が長くなり、
アーク電圧も大きくなって限流性能が向上する。With this configuration, when the movable contact 1 is opened to the maximum, the arc A is generated above the first conductor portion 4a by the pressure Fp of the space sandwiched between the arc extinguishing side plates 7. Is blown away toward the terminal portion 5 side, that is, the space that is not sandwiched between them. Further, the pressure from the space below the first conductor portion 4a is also applied, and the arc A is extended. As a result, the arc length above the first conductor portion 4a becomes longer,
The arc voltage is also increased and the current limiting performance is improved.
【0074】また、第1導体部4aより上方の2枚の消
弧側板7の間にはアークAが長い時間いないため、アー
クAによる消弧側板7の損傷が少なく、且つ、表面の絶
縁耐力の劣化も少なくなる。従って、可動接点2と固定
接点3との間の消弧側板7の表面を介しての絶縁破壊が
起こり難くなり、遮断性能も向上する。Since the arc A does not exist for a long time between the two arc-extinguishing side plates 7 above the first conductor portion 4a, damage to the arc-extinguishing side plate 7 due to the arc A is small, and the dielectric strength of the surface is reduced. Degradation is also reduced. Accordingly, dielectric breakdown via the surface of the arc-extinguishing side plate 7 between the movable contact 2 and the fixed contact 3 is less likely to occur, and the breaking performance is improved.
【0075】実施例6.図15(a)はこの発明の実施
例6による回路遮断器の電極部を示す側面図、図15
(b)は図15(a)のC−C断面図である。この実施
例6では、最大開成時の可動接触子1の可動接点2を消
弧側板7が挟まないように、その消弧側板7の上方突出
部を形成しており、図示例では、前記消弧側板7の上方
突出部に傾斜部7bを形成している。Embodiment 6 FIG. FIG. 15A is a side view showing an electrode portion of a circuit breaker according to Embodiment 6 of the present invention.
FIG. 15B is a cross-sectional view taken along the line CC of FIG. In the sixth embodiment, an upper protruding portion of the arc-extinguishing side plate 7 is formed so that the movable contact 2 of the movable contact 1 at the time of maximum opening is not sandwiched by the arc-extinguishing side plate 7. An inclined portion 7 b is formed on the upper protruding portion of the arc side plate 7.
【0076】これによって、最大開成時の可動接点2は
消弧側板7の上方に突出するため、この消弧側板7の外
側の第1導体部4aの上面が可動接点2から噴出する金
属蒸気流に曝されないように、前記絶縁物15には第1
導体部4aのスリット40の両側上面を覆う部分15d
を設けている。As a result, the movable contact 2 at the time of maximum opening protrudes above the arc-extinguishing side plate 7, so that the upper surface of the first conductor portion 4 a outside the arc-extinguishing side plate 7 causes the metal vapor flow ejected from the movable contact 2 to flow. In order to prevent the insulator 15 from being exposed to
Portion 15d covering upper surfaces on both sides of slit 40 of conductor portion 4a
Is provided.
【0077】ここで、開極中の可動接触子1は、第1導
体部4aの脇を通過するために第1導体部4aを流れる
電流による電磁力の影響を大きく受けると共に、第1導
体部4aの下方空間の圧力も受けている。そこで、圧力
や電磁力の少しの不均衡で開極途中の可動接触子1が図
15(b)上で左右に振られ、開成時に可動接点2が左
右どちらかの消弧側板7に触れてしまう危険性がある。
アークAに曝された消弧側板7の表面の絶縁耐力は非常
に低下しているため、可動接点2が消弧側板7に触れて
いる状態では、可動接点2と固定接点3との間の絶縁が
もたず、遮断不能を起こす危険性が大きい。また、可動
接点2が開成時に消弧側板7に触れていなくとも、可動
接点2と消弧側板7の間の絶縁距離が短いと、可動接点
2と固定接点3との間の絶縁破壊が消弧側板7の表面を
介して起こり、十分な遮断性能が得られない。Here, the movable contact 1 during the opening is greatly affected by the electromagnetic force due to the current flowing through the first conductor 4a to pass by the side of the first conductor 4a. The pressure in the lower space of 4a is also received. Therefore, the movable contact 1 in the middle of the opening is swung right and left in FIG. 15B due to a slight imbalance of the pressure and electromagnetic force, and the movable contact 2 touches the left or right arc-extinguishing side plate 7 at the time of opening. There is a risk that it will.
Since the dielectric strength of the surface of the arc-extinguishing side plate 7 exposed to the arc A is extremely reduced, when the movable contact 2 is in contact with the arc-extinguishing side plate 7, the distance between the movable contact 2 and the fixed contact 3 is small. There is no danger of insulation failure due to lack of insulation. Even if the movable contact 2 does not touch the arc-extinguishing side plate 7 at the time of opening, if the insulation distance between the movable contact 2 and the arc-extinguishing side plate 7 is short, the dielectric breakdown between the movable contact 2 and the fixed contact 3 is eliminated. This occurs through the surface of the arc side plate 7, and sufficient blocking performance cannot be obtained.
【0078】しかし、上記実施例6によると、開成状態
の可動接点2は消弧側板7に挟まれていないため、可動
接触子1が左右にずれても可動接点2が消弧側板7に触
れることはない。また、可動接点2と消弧側板7との間
の絶縁距離を大きく取ることができる。従って、上述の
ような遮断不能の危険性がなくなり、限流性能および遮
断性能が向上する。However, according to the sixth embodiment, since the movable contact 2 in the opened state is not sandwiched between the arc-extinguishing side plates 7, the movable contact 2 touches the arc-extinguishing side plate 7 even if the movable contact 1 is shifted left and right. Never. Further, the insulation distance between the movable contact 2 and the arc-extinguishing side plate 7 can be increased. Therefore, there is no danger of the interruption being impossible as described above, and the current limiting performance and the interruption performance are improved.
【0079】図16は実施例6の変形例による消弧側板
を備えた回路遮断器を示す側面図である。この変形例に
よる消弧側板7は、第1導体部4aからの立上り部を可
動接触子1の回動中心14側に最も偏らせ、開成時の可
動接点2を消弧側板7が挟まないように、また、開成時
の可動接触子1を消弧側板7が挟むように構成してい
る。このような構成とすることにより、開成時の可動接
点2を消弧側板7が挟まないため、実施例6の場合と同
様の効果が得られる。これに加え、開成時の可動接触子
1における可動接点2より回動中心14側の部位は消弧
側板7で挟まれるため、圧力FpによってアークAを端
子部5方向に引き延ばす力が増大する。FIG. 16 is a side view showing a circuit breaker having an arc-extinguishing side plate according to a modification of the sixth embodiment. In the arc-extinguishing side plate 7 according to this modified example, the rising portion from the first conductor portion 4a is most deviated toward the rotation center 14 of the movable contact 1 so that the movable contact 2 at the time of opening is not sandwiched by the arc-extinguishing side plate 7. In addition, the movable contact 1 at the time of opening is configured to be sandwiched by the arc-extinguishing side plate 7. With such a configuration, the same effect as that of the sixth embodiment can be obtained because the arc-extinguishing side plate 7 does not sandwich the movable contact 2 at the time of opening. In addition, since the portion of the movable contactor 1 at the time of opening that is closer to the rotation center 14 than the movable contact 2 is sandwiched by the arc-extinguishing side plate 7, the force for extending the arc A toward the terminal portion 5 by the pressure Fp increases.
【0080】実施例7. 図17は請求項2および請求項3の発明に対応した実施
例7による回路遮断器の側面図、図18は図17の正面
図であり、図18では図17中の可動接触子1を省略し
ている。この実施例7では、消弧側板7の上端縁部が固
定接触子4の高さ範囲を越えない構成としている。さら
に、開成時の可動接点2からの金属蒸気流に曝される第
1導体部4aのスリット40の両側上面を覆う絶縁部1
5dを絶縁物15に設けた構成としている。Embodiment 7 FIG. FIG. 17 is a side view of a circuit breaker according to a seventh embodiment corresponding to the second and third aspects of the present invention. FIG. 18 is a front view of FIG. 17, and FIG. 18 does not show the movable contact 1 in FIG. doing. In the seventh embodiment, the upper end edge of the arc-extinguishing side plate 7 does not exceed the height range of the fixed contact 4. Further, the insulating portion 1 covering the upper surfaces on both sides of the slit 40 of the first conductor portion 4a exposed to the metal vapor flow from the movable contact 2 at the time of opening.
5 d is provided on the insulator 15.
【0081】このような構成にしても、開極直後のアー
クAは前述したように消弧側板7の作用とアーク駆動磁
場により高いアーク電圧を発生する。Even with such a configuration, the arc A immediately after the opening generates a high arc voltage due to the action of the arc extinguishing side plate 7 and the arc driving magnetic field as described above.
【0082】すなわち、可動接点2が第1導体部4aの
上方まで開離すると、第1導体部4aの下方空間の圧力
に比べて第1導体部4aの上方空間では消弧側板7によ
ってアークAが挟まれていないために圧力は高くなら
ず、この結果、アークAは前記下方空間の圧力Fpによ
って上方向に引き延ばされる。さらに、第1導体部4a
より下方空間の圧力が上方に抜け易く、且つ、消弧側板
7の面積(受圧面積)が小さいため、その消弧側板7に
掛かる力が小さくなり、消弧側板7の機械的強度が差程
必要とされなくなる。That is, when the movable contact 2 is separated to a position above the first conductor 4a, the arc A is extinguished by the arc-extinguishing side plate 7 in the space above the first conductor 4a compared to the pressure in the space below the first conductor 4a. Is not sandwiched, the pressure does not increase, and as a result, the arc A is extended upward by the pressure Fp in the lower space. Further, the first conductor portion 4a
Since the pressure in the lower space is easily released upward and the area (pressure receiving area) of the arc-extinguishing side plate 7 is small, the force applied to the arc-extinguishing side plate 7 is small, and the mechanical strength of the arc-extinguishing side plate 7 is different. No longer needed.
【0083】また、前述のように、可動接点2の表面か
ら噴出する金属蒸気流は第1導体部4aを覆っている絶
縁物15に吹き付けられて冷却される。このとき、第1
導体部4aの上方には消弧側板7が無いので、可動接点
2からの金属蒸気流は第1導体部4aのスリット40の
両側上面の絶縁物15d方向にも吹き付け、スリット4
0の端子部5側を覆っている絶縁物15aだけに集中す
ることが無くなる。As described above, the metal vapor flow spouting from the surface of the movable contact 2 is blown onto the insulator 15 covering the first conductor 4a to be cooled. At this time, the first
Since there is no arc extinguishing side plate 7 above the conductor 4a, the metal vapor flow from the movable contact 2 is also blown toward the insulator 15d on the upper surface on both sides of the slit 40 of the first conductor 4a.
It is not necessary to concentrate only on the insulator 15a that covers the terminal portion 5 side.
【0084】従って、アークAによる絶縁物15aの損
傷が少なくなる。また、固定接触子4の電磁力によって
第1導体部4aのスリット40の端子部5側の絶縁物1
5bに押し付けられて強制的に冷却されるため、高いア
ーク電圧が維持できることは前述と同様である。さらに
可動接触子1が開成状態で左右にずれたとしても、可動
接点2は消弧側板7に触れないため、前述のような遮断
不能も起きない。Accordingly, damage to the insulator 15a due to the arc A is reduced. Also, the insulator 1 on the terminal portion 5 side of the slit 40 of the first conductor portion 4a is generated by the electromagnetic force of the fixed contact 4.
As described above, it is possible to maintain a high arc voltage because it is forcibly cooled by being pressed against 5b. Furthermore, even if the movable contact 1 is shifted left and right in the open state, the movable contact 2 does not touch the arc-extinguishing side plate 7, so that the above-described inability to shut off does not occur.
【0085】図19は実施例7の変形例による回路遮断
器の側面図である。この変形例では、前記実施例7によ
る消弧側板7の上端縁部が固定接触子4の高さ範囲を越
えていないため、その固定接触子4の第1導体部4aの
上方空間に消弧板6を配置し易く、この消弧板6の配置
によって遮断性能を一層向上させることができる。FIG. 19 is a side view of a circuit breaker according to a modification of the seventh embodiment. In this modification, since the upper edge of the arc-extinguishing side plate 7 according to the seventh embodiment does not exceed the height range of the fixed contact 4, the arc extinguishing is performed in the space above the first conductor 4a of the fixed contact 4. The plate 6 can be easily arranged, and the arrangement of the arc extinguishing plate 6 can further improve the breaking performance.
【0086】実施例8.図20はこの発明の実施例8に
よる回路遮断器の電極部を示す側面図である。この実施
例8では、固定接触子4の第1導体部4aより下方の端
子部5側の空間を消弧側板7が挟まないように該消弧側
板7を形成している。なお、この実施例8による消弧側
板7は、端子部5側の端部7eを直角に形成している。
この実施例8によると、開極初期あるいは図示のような
開成時に固定接点3の近傍空間は消弧側板7で挟まれて
いるため、圧力が上昇し、この上昇圧力Fpによってア
ークAが端子部5側に引き延ばされ、開極初期のアーク
電圧の上昇速度の向上あるいは開成時のアークAの絶縁
物15bへの駆動強化によるアーク電圧の向上が図れ
る。Embodiment 8 FIG. FIG. 20 is a side view showing an electrode portion of a circuit breaker according to Embodiment 8 of the present invention. In the eighth embodiment, the arc-extinguishing side plate 7 is formed such that the space on the side of the terminal portion 5 below the first conductor portion 4a of the fixed contact 4 is not sandwiched by the arc-extinguishing side plate 7. In the arc-extinguishing side plate 7 according to the eighth embodiment, the end 7e on the terminal portion 5 side is formed at a right angle.
According to the eighth embodiment, since the space near the fixed contact 3 is sandwiched by the arc-extinguishing side plate 7 at the initial stage of opening or at the time of opening as shown in the figure, the pressure rises, and the rising pressure Fp causes the arc A to move to the terminal portion. The arc voltage is extended to the side 5, and the arc voltage can be increased by increasing the rising speed of the arc voltage at the beginning of opening or by strengthening the drive of the arc A to the insulator 15b at the time of opening.
【0087】図21は実施例8の変形例による回路遮断
器の電極部を示す側面図であり、この変形例では、消弧
側板7の端子部5側の端部7eを図示のように傾斜させ
た構成としており、実施例8と同様の効果が得られる。FIG. 21 is a side view showing an electrode portion of a circuit breaker according to a modification of the eighth embodiment. In this modification, the end 7e of the arc-extinguishing side plate 7 on the terminal portion 5 side is inclined as shown in FIG. With this configuration, the same effect as that of the eighth embodiment can be obtained.
【0088】実施例9.図22(a)はこの発明の実施
例9による回路遮断器の電極部を示す側面図、図22
(b)は図22(a)の正面図である。この実施例9
は、前記実施例7〜実施例8の場合と同様に、固定接触
子4の高さ範囲を越えない消弧側板7を備えた回路遮断
器において、第1導体部4aのスリット40の内面の端
子部5側を覆っている絶縁物15bを下方に延ばして垂
下延長絶縁部15cを形成したものである。Embodiment 9 FIG. FIG. 22A is a side view showing an electrode portion of a circuit breaker according to Embodiment 9 of the present invention.
FIG. 23B is a front view of FIG. Example 9
In the circuit breaker provided with the arc-extinguishing side plate 7 which does not exceed the height range of the fixed contact 4 similarly to the case of the seventh to eighth embodiments, the inner surface of the slit 40 of the first conductor portion 4a is The insulator 15b covering the terminal portion 5 is extended downward to form a hanging extension insulating portion 15c.
【0089】この実施例9によると、第1導体部4aの
下方のアークAには端子部5方向の強力な電磁力が働い
ているため、アークAは絶縁物15の垂下延長絶縁部1
5cに押し付けられて強制的に冷却され、冷却効果が向
上する。また、第1導体部4aの端子部5方向が前記絶
縁物15cで遮られているため、両側の消弧側板7によ
るアーク断面積の制限効果がより有効に働く。According to the ninth embodiment, since the strong electromagnetic force in the direction of the terminal portion 5 acts on the arc A below the first conductor portion 4a, the arc A is caused by the drooping extension insulating portion 1 of the insulator 15.
5c to be forcibly cooled, and the cooling effect is improved. Since the direction of the terminal portion 5 of the first conductor portion 4a is blocked by the insulator 15c, the effect of limiting the arc cross-sectional area by the arc extinguishing side plates 7 on both sides works more effectively.
【0090】実施例10. 図23(a)は実施例10による回路遮断器の電源部を
示す側面図、図23(b)は図23(a)のD−D線断
面図である。この実施例10では、固定接触子4の高さ
範囲を上端縁部が越えないようにした消弧側板7におい
て、この消弧側板7の下端が固定接点3より下方になる
ように構成している。Embodiment 10 FIG. Figure 23 (a) is a side view showing the power supply portion of the circuit breaker according to the real施例10, FIG. 23 (b) is a sectional view taken along line D-D of FIG. 23 (a). In the tenth embodiment, in the arc-extinguishing side plate 7 in which the upper edge does not exceed the height range of the fixed contact 4, the lower end of the arc-extinguishing side plate 7 is configured to be lower than the fixed contact 3. I have.
【0091】このように消弧側板7を構成することによ
って、図示の開極初期には、固定接触子4の第1導体部
4aより下方の空間において、アークAの熱で発生した
圧力が前記消弧側板7の下側から逃げなくなり、このた
め、圧力が高くなる。この結果、可動接触子1を押し上
げる圧力が大きくなり、可動接触子1の開極初期の開極
速度が大きくできる。By configuring the arc extinguishing side plate 7 in this manner, in the initial stage of opening shown in the drawing, the pressure generated by the heat of the arc A in the space below the first conductor portion 4a of the fixed contactor 4 is increased. It does not escape from the lower side of the arc-extinguishing side plate 7, and therefore the pressure increases. As a result, the pressure for pushing up the movable contact 1 increases, and the opening speed of the movable contact 1 in the initial stage of opening can be increased.
【0092】また、前述のように、固定接触子4の第1
導体部4aの下方空間では端子部5方向の電磁力が強力
なため、アークAは逆の方向である可動接触子1の回動
中心14方向には動けず、さらに、この実施例10のよ
うに、消弧側板7の下側から圧力が逃げないためアーク
Aを端子部5方向に押す力が非常に大きくなる。その力
によって、アークAは端子部5方向に大きく引き延ばさ
れ、アーク電圧の初期の上昇速度が大きくなる。また、
開成時ではアークAを絶縁物15の内面絶縁物15bに
押し付ける力となり冷却効果も向上する。Further, as described above, the first contact
Since the electromagnetic force in the direction of the terminal portion 5 is strong in the space below the conductor portion 4a, the arc A cannot move in the opposite direction to the direction of the rotation center 14 of the movable contact 1, and furthermore, as in the tenth embodiment. In addition, since the pressure does not escape from below the arc-extinguishing side plate 7, the force for pushing the arc A toward the terminal portion 5 becomes extremely large. The arc A is greatly elongated in the direction of the terminal portion 5 by the force, and the initial rising speed of the arc voltage is increased. Also,
At the time of opening, the arc A is pressed against the inner insulator 15b of the insulator 15, and the cooling effect is also improved.
【0093】図24(a)は図23の変形例による回路
遮断器の電極部を示す側面図、図24(b)は図24
(a)のE−E線断面図である。この変形例では、消弧
側板7の下端を第2導体部4e上に接触させると共に、
その第2導体部4eを前記消弧側板7の相互間隔より幅
広く形成している。これによって、前記消弧側板7の下
端からの圧力の逃げを防ぐことができる。FIG. 24A is a side view showing an electrode portion of a circuit breaker according to a modification of FIG. 23, and FIG.
FIG. 3A is a sectional view taken along line EE of FIG. In this modification, the lower end of the arc-extinguishing side plate 7 is brought into contact with the second conductor portion 4e,
The second conductor portion 4e is formed wider than the mutual interval between the arc extinguishing side plates 7. Thereby, the escape of the pressure from the lower end of the arc extinguishing side plate 7 can be prevented.
【0094】実施例11. 図25は請求項4の発明に対応した実施例11による回
路遮断器の電極部を示す側面図、図26は図25のF−
F線断面図である。この実施例11では、前記実施例1
0の場合とは逆に消弧側板7の下端が固定接点3より上
方に位置するように構成したものである。すなわち、両
側の消弧側板7のそれぞれの下端と固定接触子4の第2
導体部4Eとの間に隙間Sを設けたものである。Embodiment 11 FIG. FIG. 25 is a side view showing an electrode portion of a circuit breaker according to an eleventh embodiment corresponding to the invention of claim 4 , and FIG.
It is an F line sectional view. In the eleventh embodiment, the first embodiment
Contrary to the case of 0, the lower end of the arc-extinguishing side plate 7 is located above the fixed contact 3. That is, the lower ends of the arc extinguishing side plates 7 on both sides and the second
A gap S is provided between the conductor and the conductor 4E.
【0095】このような構成とすることにより、固定接
触子4の第1導体部4aより下方の空間の圧力を消弧側
板7下端の隙間Sから逃がすことができ、このため、前
記下方空間の圧力上昇を低く抑えることができる。この
結果、消弧側板7に掛かる圧力が減少し、消弧側板7に
必要な機械的強度を低減することができる。また、電流
遮断時における消弧側板7の表面の絶縁耐力が小さく固
定接点3から消弧側板7の表面を通って可動接点2に絶
縁破壊しようとしても、固定接点3と消弧側板7との間
の絶縁距離を大きく取れるので、絶縁破壊が起こるよう
なことがなく、遮断性能が向上する。With such a configuration, the pressure in the space below the first conductor portion 4a of the fixed contact 4 can be released from the gap S at the lower end of the arc-extinguishing side plate 7, so that the space in the lower space can be reduced. The pressure rise can be kept low. As a result, the pressure applied to the arc-extinguishing side plate 7 decreases, and the mechanical strength required for the arc-extinguishing side plate 7 can be reduced. In addition, even if the dielectric strength of the surface of the arc-extinguishing side plate 7 at the time of current interruption is small and the dielectric breakdown from the fixed contact 3 through the surface of the arc-extinguishing side plate 7 to the movable contact 2 is to be performed, the electric contact between the fixed contact 3 and the arc-extinguishing side plate 7 can be prevented. Since the insulation distance between them can be increased, insulation breakdown does not occur, and the breaking performance is improved.
【0096】図27は実施例11の変形例による回路遮
断器の電極部を示す側面図である。この変形例では、消
弧側板7の固定接点3側に傾斜辺部7fを形成すること
により、固定接点3と消弧側板7の下端との間の距離を
端子部5側になるほど大きくなるように構成したことを
特徴とする。FIG. 27 is a side view showing an electrode part of a circuit breaker according to a modification of the eleventh embodiment. In this modification, the inclined side 7f is formed on the fixed contact 3 side of the arc-extinguishing side plate 7 so that the distance between the fixed contact 3 and the lower end of the arc-extinguishing side plate 7 is increased toward the terminal 5 side. It is characterized by having comprised in.
【0097】ここで、アークAによる消弧側板7の損傷
は、固定接触子4が発生する電磁力によって端子部5側
に移動するため、端子部5側の方が大きい。したがっ
て、端子部5側の方の消弧側板7の表面の絶縁耐力が劣
化し易い。Here, the arc A extinguishes the arc-extinguishing side plate 7 due to the electromagnetic force generated by the fixed contact 4 and moves to the terminal 5 side. Therefore, the dielectric strength of the surface of the arc-extinguishing side plate 7 on the side of the terminal portion 5 is likely to deteriorate.
【0098】このため、本変形例のような前記構成にす
ると、消弧側板7の表面の劣化が少ない部分では消弧側
板7の下端が固定接点3の高さに近くなって、消弧側板
7のアーク冷却効果や断面積制限効果を最大限に活かす
ことができ、表面の絶縁劣化が大きい消弧側板7の部分
の下端は固定接点3より十分高く絶縁距離を大きく取っ
てあるので、限流性能および遮断性能の向上が図れる。For this reason, with the above-described configuration as in this modification, the lower end of the arc-extinguishing side plate 7 is close to the height of the fixed contact 3 in a portion where the surface of the arc-extinguishing side plate 7 is less deteriorated. 7 can make the most of the arc cooling effect and the cross-sectional area limiting effect, and the lower end of the arc-extinguishing side plate 7 where the surface insulation deterioration is large is sufficiently higher than the fixed contact 3 and the insulation distance is set to be large. Flow performance and cutoff performance can be improved.
【0099】実施例12. 図28は実施例12による回路遮断器の電極部を示す側
面図、図29は図28のG−G線断面図である。この実
施例12では、両側の消弧側板7の相互間の距離(以
下、幅と呼ぶ)を端子部5側とこれの反対側とで変えた
ものである。Embodiment 12 FIG. Figure 28 is a side view showing an electrode portion of a circuit breaker according to the real施例12, FIG. 29 is a line G-G cross-sectional view of FIG. 28. In the twelfth embodiment, the distance (hereinafter, referred to as the width) between the arc extinguishing side plates 7 on both sides is changed between the terminal portion 5 side and the opposite side.
【0100】すなわち、両側の消弧側板7の相互間にお
いて、図29に示すように、開極動作時の可動接点2の
軌跡に対向する部分を幅狭部70aとし、この幅狭部7
0aより端子部5側を幅広部70bとし、前記幅狭部7
0aの幅寸法をL,前記幅広部70bの幅寸法をMとし
たとき、L<Mとなるように前記消弧側板7を構成して
いる。That is, as shown in FIG. 29, between the arc extinguishing side plates 7 on both sides, a portion facing the trajectory of the movable contact 2 at the time of the opening operation is defined as a narrow portion 70a.
0a, the terminal portion 5 side is a wide portion 70b, and the narrow portion 7
When the width of Oa is L and the width of the wide portion 70b is M, the arc-extinguishing side plate 7 is configured to satisfy L <M.
【0101】このように消弧側板7を構成すると、開極
直後の接点2,3間に発生した大電流にならない前の小
電流アークAは、消弧側板7の前記幅狭部70aで挟ま
れた幅狭空間にあるため、前述のような消弧側板7の効
果を受け易い。これと固定接触子4による強力なアーク
駆動磁場によってアーク電圧の立ち上がりが速くなる。When the arc-extinguishing side plate 7 is configured as described above, the small-current arc A generated between the contacts 2 and 3 immediately after the opening and before the high current does not become large is sandwiched by the narrow portion 70a of the arc-extinguishing side plate 7. Because of the narrow space, the effect of the arc-extinguishing side plate 7 as described above is easily received. This and the strong arc driving magnetic field generated by the fixed contact 4 speed up the rise of the arc voltage.
【0102】そして、可動接触子1が更に開極していく
と、両側の消弧側板7で挟まれた空間の圧力Fpと固定
接触子4の第1導体部4aより下方のアークAでは、更
に固定接触子4が発生する強力なアーク駆動磁場によっ
て消弧側板7の幅広部70bで挟まれた空間に駆動され
る。ひとたびアークAが前記消弧側板7の幅広部70b
間の空間に出ると、この幅広部70bから前記幅狭部7
0aの空間にはアークAが戻り難くなる。これらの結
果、アークAは引き延ばされ易くなり、且つ、その状態
を保ち易いため、高いアーク電圧を発生、維持すること
ができる。When the movable contact 1 further opens, the pressure Fp of the space sandwiched between the arc extinguishing side plates 7 on both sides and the arc A below the first conductor 4a of the fixed contact 4 Further, the fixed contact 4 is driven into a space sandwiched between the wide portions 70b of the arc extinguishing side plate 7 by a strong arc driving magnetic field generated by the fixed contact 4. Once the arc A reaches the wide portion 70b of the arc-extinguishing side plate 7
When entering the space between the wide portions 70b and the narrow portions 7
It is difficult for the arc A to return to the space 0a. As a result, the arc A is easily elongated and its state is easily maintained, so that a high arc voltage can be generated and maintained.
【0103】また、第1導体部4aの下方空間におい
て、アークAが消弧側板7の幅広部70b間の空間にあ
るときは、この空間が広いため圧力上昇が少なく、且
つ、アークAから前記消弧側板7の幅広部70bまでの
距離も大きくなるため、前記消弧側板7の幅広部70b
のアークAに曝される面の損傷も少なくなる。これらの
結果、消弧側板7に要求される機械的強度や耐アーク性
の条件が緩和される。When the arc A is located in the space between the wide portions 70b of the arc-extinguishing side plates 7 in the space below the first conductor portion 4a, the space is large, so that the pressure rise is small and the arc A Since the distance to the wide portion 70b of the arc-extinguishing side plate 7 is also large, the wide portion 70b of the arc-extinguishing side plate 7 is large.
Of the surface exposed to the arc A is also reduced. As a result, the requirements for the mechanical strength and arc resistance required for the arc-extinguishing side plate 7 are relaxed.
【0104】図30は実施例12の変形例による回路遮
断器の電極部の側面図、図31は図30の平面図であ
る。この変形例は、前記実施例12による消弧側板7の
高さが固定接触子4の第1導体部4aを越えないように
したものであり、前記実施例12と同様の効果が得られ
る。FIG. 30 is a side view of an electrode portion of a circuit breaker according to a modification of the twelfth embodiment, and FIG. 31 is a plan view of FIG. In this modification, the height of the arc-extinguishing side plate 7 according to the twelfth embodiment does not exceed the first conductor portion 4a of the fixed contact 4, and the same effect as that of the twelfth embodiment can be obtained.
【0105】実施例13. 図32は請求項5の発明に対応した実施例13による回
路遮断器の電極部を示す側面図、図33は図32のH−
H線断面図である。この実施例13では、消弧側板7の
幅狭部70aと幅広部70bを、前記実施例12の場合
と逆にしたものである。すなわち、図33に示すよう
に、開極動作時の可動接点2の軌跡に対向する消弧側板
7の部分を幅広部70bとして形成すると共に、この幅
広部70bから端子部5側の前記消弧側板7の部分を幅
狭部70aとして形成したものである。Embodiment 13 FIG. FIG. 32 is a side view showing an electrode part of a circuit breaker according to a thirteenth embodiment corresponding to the invention of claim 5 , and FIG.
It is an H-line sectional view. In the thirteenth embodiment, the narrow portion 70a and the wide portion 70b of the arc-extinguishing side plate 7 are reversed from those of the twelfth embodiment. That is, as shown in FIG. 33, the portion of the arc-extinguishing side plate 7 facing the trajectory of the movable contact 2 during the opening operation is formed as a wide portion 70b, and the arc-extinguishing from the wide portion 70b to the terminal portion 5 side is performed. The portion of the side plate 7 is formed as a narrow portion 70a.
【0106】このようにすると、固定接触子4の第1導
体部4aの下方空間のアークAには固定接触子4が発生
する強力なアーク駆動磁場Fmが働く。このため、接点
2,3間で発生した消弧側板7の幅広部70b間の幅広
空間にあるアークAは、前記消弧側板7の幅狭部70a
で挟まれた幅狭空間に押し込められる。In this way, a strong arc driving magnetic field Fm generated by the fixed contact 4 acts on the arc A in the space below the first conductor 4a of the fixed contact 4. For this reason, the arc A generated between the contacts 2 and 3 and located in the wide space between the wide portions 70b of the arc-extinguishing side plate 7 is reduced by the narrow portions 70a of the arc-extinguishing side plate 7.
It is pushed into the narrow space sandwiched between.
【0107】一般に幅狭空間の圧力のほうが大きくなっ
て幅狭空間にアークを保持することは困難である。しか
し、本発明のように極めて大きなアーク駆動磁場Fmが
ある場合に初めて前記消弧側板7の幅狭部70a間の幅
狭空間にアークAを押し込めることができる。このよう
に幅狭空間に押し込められたアークAは、前述のような
消弧側板7の効果を一層大きく受け、高いアーク電圧を
発生する。Generally, the pressure in the narrow space becomes larger, and it is difficult to hold the arc in the narrow space. However, the arc A can be pushed into the narrow space between the narrow portions 70a of the arc extinguishing side plate 7 only when there is an extremely large arc driving magnetic field Fm as in the present invention. The arc A pushed into the narrow space in this manner receives the effect of the arc extinguishing side plate 7 as described above, and generates a high arc voltage.
【0108】図34は実施例13の変形例による回路遮
断器の電極部を示す側面図、図35は図34の平面図で
ある。この変形例では、消弧側板7の高さが固定接触子
4の第1導体部4aを越えないように構成している。ま
た、前記消弧側板7は図35に示すように一体構成のも
のとし、その消弧側板7に横倒凸状の切欠部70を形成
することにより、この切欠部70によって幅広部70b
と幅狭部70aとを連続形成しており、この場合におい
ても同様の効果が得られる。FIG. 34 is a side view showing an electrode part of a circuit breaker according to a modification of the thirteenth embodiment, and FIG. 35 is a plan view of FIG. In this modification, the height of the arc-extinguishing side plate 7 is configured not to exceed the first conductor 4a of the fixed contact 4. The arc-extinguishing side plate 7 is of an integral construction as shown in FIG. 35, and a notch 70 is formed in the arc-extinguishing side plate 7 so that the wide side 70b is formed by the notch 70.
And the narrow portion 70a are continuously formed. In this case, the same effect can be obtained.
【0109】図36は実施例13の他の変形例による消
弧側板を備えた固定接触子の平面図であり、この変形例
では、図35に示した消弧側板7の幅狭部70aを、端
子部5側が漸次先鋭となるV字状に形成ものであり、実
施例13の場合と同様の効果が得られる。FIG. 36 is a plan view of a fixed contact provided with an arc-extinguishing side plate according to another modification of the thirteenth embodiment. In this modification, the narrow portion 70a of the arc-extinguishing side plate 7 shown in FIG. The terminal portion 5 is formed in a V-shape in which the terminal portion 5 is gradually sharpened, and the same effect as that of the thirteenth embodiment can be obtained.
【0110】図37は実施例13の別の変形例による消
弧側板を備えた固定接触子の平面図であり、この変形例
では、消弧側板7の幅狭部70aを、図36の場合とは
逆に端子部5側が漸次幅広くなるように形成したもので
あり、この場合も同様の効果が得られる。FIG. 37 is a plan view of a fixed contact provided with an arc-extinguishing side plate according to another modification of the thirteenth embodiment. In this modification, the narrow portion 70a of the arc-extinguishing side plate 7 corresponds to the case of FIG. On the contrary, the terminal portion 5 is formed so that the width thereof is gradually increased. In this case, the same effect can be obtained.
【0111】図38(a)は実施例13の変形例による
回路遮断器の電極部を示す側面図、図38(b)は図3
8(a)のI−I線断面図、図38(c)は図38
(a)の平面図である。この変形例では、消弧側板7の
幅狭部70aを端子部5側の上部に形成しており、この
場合も同様の効果が得られる。FIG. 38A is a side view showing an electrode portion of a circuit breaker according to a modification of the thirteenth embodiment, and FIG.
FIG. 8A is a cross-sectional view taken along line II of FIG.
It is a top view of (a). In this modification, the narrow portion 70a of the arc-extinguishing side plate 7 is formed in the upper portion on the terminal portion 5 side, and the same effect can be obtained in this case.
【0112】以上において、この発明における消弧側板
7および絶縁物15には無機あるいは有機の絶縁物質を
用いることができる。無機絶縁物を用いればアークに曝
される面の損傷を少なくすることができる。また、有機
絶縁物を用いればアークに曝される面から大量の分解ガ
スが放出されるため、アーク冷却効果が非常に大きくな
る。有機絶縁物でもメラミンフェノール系は消弧性のガ
スを良く放出し、且つ表面の絶縁劣化が起こらないた
め、消弧側板7あるいは絶縁物15をメラミンフェノー
ル系の有機物で構成すると、限流性能および遮断性能を
一層向上させることができる。In the above, an inorganic or organic insulating material can be used for the arc-extinguishing side plate 7 and the insulator 15 in the present invention. The use of an inorganic insulator can reduce damage to the surface exposed to the arc. Further, if an organic insulator is used, a large amount of decomposed gas is released from the surface exposed to the arc, so that the arc cooling effect becomes extremely large. Even in the case of an organic insulator, a melamine phenol-based material releases an arc-extinguishing gas well and does not cause surface insulation deterioration. Therefore, when the arc-extinguishing side plate 7 or the insulator 15 is formed of a melamine-phenol-based organic material, current-limiting performance and The blocking performance can be further improved.
【0113】なお、上記各実施例では、回路遮断器の場
合について説明したが、他の開閉器であってもよく、上
記実施例と同様の効果が得られる。In each of the above embodiments, the case of a circuit breaker has been described. However, another switch may be used, and the same effect as that of the above embodiment can be obtained.
【0114】[0114]
【発明の効果】以上のように、請求項1の発明によれ
ば、接点間に発生したアークが両側の消弧側板で挟ま
れ、これらの消弧側板によって、該消弧側板間の幅方向
への前記アークの広がりが阻止される構成としたので、
開極直後のアークに対して強力なアーク駆動磁場を印加
し、消弧側板の作用を大きく発揮させることができ、開
成状態では、アークを強制的に絶縁物に押し付けて冷却
することができるので、限流遮断性能の優れた開閉器が
得られるという効果がある。As described above, according to the first aspect of the invention, the arc generated between the contacts is sandwiched between the arc extinguishing side plates on both sides, and the arc extinguishing side plates are arranged in the width direction between the arc extinguishing side plates. The spread of the arc to
By applying a strong arc driving magnetic field to the arc immediately after opening, the effect of the arc-extinguishing side plate can be greatly exerted.In the open state, the arc can be forcibly pressed against the insulator and cooled. In addition, there is an effect that a switch having excellent current limiting performance can be obtained.
【0115】請求項2の発明によれば、開極直後のアー
クに対して強力なアーク駆動磁場を印加し、消弧側板の
作用を大きく発揮させ、開成状態ではアークを強制的に
絶縁物に押し付けて冷却することができ、更に開成状態
に可動接点が消弧側板から突出している構成としたの
で、消弧側板の表面の絶縁が劣化しても、固定接点と可
動接点間の絶縁耐力を大きくできるため、限流遮断性能
の優れた開閉器が得られるという効果がある。According to the second aspect of the invention, the arc immediately after the opening is opened.
A strong arc driving magnetic field is applied to the
Exerts a large effect, forcing the arc in the open state
It can be cooled by pressing against insulation, and it can be opened further
The movable contact protrudes from the arc-extinguishing side plate
Even if insulation on the surface of the arc-extinguishing side plate deteriorates,
Current limiting performance due to high dielectric strength between moving contacts
There is an effect that a switch excellent in the above can be obtained.
【0116】請求項3の発明によれば、開極直後のアー
クに対して強力なアーク駆動磁場を印加し、消弧側板の
作用を大きく発揮させ、開成状態ではアークを強制的に
絶縁物に押し付けて冷却することができ、更に第1導体
部の下方空間の圧力上昇によりアークを上方向に吹き飛
ばしアークを長く引き延ばし、また、可動接触子の開極
速度も大きくなるので、限流遮断性能の優れた開閉器を
得ることができるという効果がある。According to the third aspect of the invention, the arc immediately after the opening is opened.
A strong arc driving magnetic field is applied to the
Exerts a large effect, forcing the arc in the open state
It can be cooled by pressing against an insulator, and the first conductor
Arc blows upward due to pressure increase in the space below the part
Prolong the extension arc and open the movable contact
Since the speed also increases, a switch with excellent current limiting
There is effect that can get.
【0117】請求項4の発明によれば、開極直後のアー
クに対して強力なアーク駆動磁場を印加し、消弧側板の
作用を大きく発揮させ、開成状態ではアークを強制的に
絶縁物に押し付けて冷却することができ、更に第1導体
部の下方空間の圧力を消弧側板の下端から逃がすため、
消弧側板に掛かる力を低減できるため、消弧側板に機械
的強度をそれほど必要としない限流遮断性能の優れた開
閉器を得ることができるという効果がある。According to the invention of claim 4, the arc immediately after the opening is opened.
A strong arc driving magnetic field is applied to the
Exerts a large effect, forcing the arc in the open state
It can be cooled by pressing against an insulator, and the first conductor
To release the pressure in the space below the part from the lower end of the arc-extinguishing side plate,
Since the force applied to the arc-extinguishing side plate can be reduced, mechanical
There is an effect that it is possible to obtain an open / close device excellent in current limiting performance that does not require much strength .
【0118】請求項5の発明によれば、開極直後のアー
クに対して強力なアーク駆動磁場を印加し、消弧側板の
作用を大きく発揮させ、開成状態ではアークを強制的に
絶縁物に押し付けて冷却することができ、更に可動接点
の軌跡に対向する部分の消弧側板の間の距離に比べて電
源系統側における消弧側板の間の幅を狭めたため、電流
遮断性能の優れた開閉器が得られる効果がある。According to the fifth aspect of the invention, the arc immediately after the opening is opened.
A strong arc driving magnetic field is applied to the
Exerts a large effect, forcing the arc in the open state
It can be cooled by pressing against an insulator, and it can be moved further.
Compared to the distance between the arc-extinguishing side plates in the
Because the width between the arc-extinguishing side plates on the source system side was reduced, the current
There is an effect that a switch having excellent breaking performance can be obtained .
【0119】[0119]
【0120】[0120]
【0121】[0121]
【0122】[0122]
【図1】請求項1の発明に対応した実施例1による回路
遮断器の閉成状態を示す消弧部の側面図である。FIG. 1 is a side view of an arc extinguishing unit showing a closed state of a circuit breaker according to a first embodiment corresponding to the first aspect of the present invention.
【図2】図1の回路遮断器の開成状態を示す側面図であ
る。2 is a view to side view of an open state of the circuit breaker of Figure 1.
【図3】図1および図2における消弧側板を含む固定接
触子の平面図である。FIG. 3 is a plan view of a fixed contact including the arc-extinguishing side plate in FIGS. 1 and 2;
【図4】図3の正面図である。FIG. 4 is a front view of FIG. 3;
【図5】図3の斜視図である。FIG. 5 is a perspective view of FIG. 3;
【図6】実施例1の接点開離直後の状態を示す回路遮断
器の動作説明図である。FIG. 6 is an operation explanatory diagram of the circuit breaker showing a state immediately after the contact is opened in the first embodiment.
【図7】図6のA−A線に沿う断面図である。FIG. 7 is a sectional view taken along the line AA of FIG. 6;
【図8】図6の最大開極状態を示す回路遮断器の動作説
明図である。FIG. 8 is an explanatory diagram of the operation of the circuit breaker showing the maximum opening state of FIG. 6;
【図9】図8のB−B線に沿う断面図である。FIG. 9 is a sectional view taken along line BB of FIG. 8;
【図10】図9のZ軸上において固定接触子を流れる電
流が作る磁場強度分布を示すグラフ図である。FIG. 10 is a graph showing a magnetic field intensity distribution generated by a current flowing through a fixed contact on the Z axis in FIG. 9;
【図11】この発明の実施例2による回路遮断器の接点
閉成状態を示す側面図である。FIG. 11 is a side view showing a contact closed state of the circuit breaker according to Embodiment 2 of the present invention.
【図12】図12(a)はこの発明の実施例3による回
路遮断器の電極部を示す側面図である。 図12(b)は図12(a)の可動接触子を省略した正
面図である。FIG. 12 (a) is a side view showing an electrode part of a circuit breaker according to Embodiment 3 of the present invention. FIG. 12B is a front view in which the movable contact of FIG. 12A is omitted.
【図13】この発明の実施例4による回路遮断器の電極
部を示す側面図である。FIG. 13 is a side view showing an electrode portion of a circuit breaker according to Embodiment 4 of the present invention.
【図14】この発明の実施例5による回路遮断器の電極
部を示す側面図である。FIG. 14 is a side view showing an electrode part of a circuit breaker according to Embodiment 5 of the present invention.
【図15】図15(a)はこの発明の実施例6による回
路遮断器の電極部を示す側面図である。 図15(b)は図15(a)のC−C断面図である。FIG. 15 (a) is a side view showing an electrode portion of a circuit breaker according to Embodiment 6 of the present invention. FIG. 15B is a cross-sectional view taken along the line CC of FIG.
【図16】図15の変形例による消弧側板を備えた回路
遮断器を示す側面図である。FIG. 16 is a side view showing a circuit breaker including an arc extinguishing side plate according to a modification of FIG.
【図17】請求項2および請求項3の発明に対応した実
施例7による回路遮断器の側面図である。FIG. 17 is a side view of a circuit breaker according to a seventh embodiment corresponding to the second and third aspects of the present invention.
【図18】図17の正面図である。18 is a front view of FIG.
【図19】実施例7の変形例による回路遮断器の側面図
である。FIG. 19 is a side view of a circuit breaker according to a modification of the seventh embodiment.
【図20】この発明の実施例8による回路遮断器の電極
部を示す側面図である。FIG. 20 is a side view showing an electrode portion of a circuit breaker according to Embodiment 8 of the present invention.
【図21】実施例8の変形例による回路遮断器の電極部
を示す側面図である。FIG. 21 is a side view showing an electrode part of a circuit breaker according to a modification of the eighth embodiment.
【図22】図22(a)はこの発明の実施例9による回
路遮断器の電極部を示す側面図である。 図22(b)は図22(a)の正面図である。FIG. 22 (a) is a side view showing an electrode part of a circuit breaker according to Embodiment 9 of the present invention. FIG. 22B is a front view of FIG.
【図23】図23(a)は実施例10による回路遮断器
の電源部を示す側面図である。 図23(b)は図23(a)のD−D線断面図である。[23] FIG. 23 (a) is a side view showing the power supply portion of the circuit breaker according to the actual施例10. FIG. 23B is a cross-sectional view taken along line DD of FIG.
【図24】図24(a)は図23の変形例による回路遮
断器の電極部の側面図である。 図24(b)は図24(a)のE−E線断面図である。24 (a) is a side view of an electrode portion of a circuit breaker according to a modification of FIG. FIG. 24B is a cross-sectional view taken along line EE of FIG.
【図25】請求項4の発明に対応した実施例11による
回路遮断器の電極部を示す側面図である。FIG. 25 is a side view showing an electrode part of a circuit breaker according to Embodiment 11 corresponding to the invention of claim 4 ;
【図26】図25のF−F線断面図である。26 is a sectional view taken along line FF of FIG. 25.
【図27】実施例11の変形例による回路遮断器の電極
部を示す側面図である。FIG. 27 is a side view showing an electrode part of a circuit breaker according to a modification of the eleventh embodiment.
【図28】実施例12による回路遮断器の電極部を示す
側面図である。Figure 28 is a side view showing an electrode portion of a circuit breaker according to the actual施例12.
【図29】図28のG−G線断面図である。29 is a sectional view taken along line GG of FIG. 28.
【図30】実施例12の変形例による回路遮断器の電極
部を示す側面図である。FIG. 30 is a side view showing an electrode part of a circuit breaker according to a modification of the twelfth embodiment.
【図31】図30の平面図である。FIG. 31 is a plan view of FIG. 30.
【図32】請求項5の発明に対応した実施例13による
回路遮断器の電極部を示す側面図である。FIG. 32 is a side view showing an electrode part of a circuit breaker according to Embodiment 13 corresponding to the invention of claim 5 ;
【図33】図32のH−H線断面図である。FIG. 33 is a sectional view taken along line HH of FIG. 32;
【図34】実施例13の変形例による回路遮断器の電極
部を示す側面図である。FIG. 34 is a side view showing an electrode part of a circuit breaker according to a modification of the thirteenth embodiment.
【図35】図34の平面図である。FIG. 35 is a plan view of FIG. 34;
【図36】実施例13の他の変形例による消弧側板を備
えた固定接触子の平面図である。FIG. 36 is a plan view of a fixed contact provided with an arc-extinguishing side plate according to another modification of the thirteenth embodiment.
【図37】実施例13の別の変形例による消弧側板を備
えた固定接触子の平面図である。FIG. 37 is a plan view of a fixed contact provided with an arc-extinguishing side plate according to another modification of the thirteenth embodiment.
【図38】図38(a)は実施例13の変形例による回
路遮断器の電極部を示す側面図である。 図38(b)は図38(a)のI−I線断面図である。 図38(c)は図38(a)の平面図である。FIG. 38 (a) is a side view showing an electrode part of a circuit breaker according to a modification of the thirteenth embodiment. FIG. 38B is a cross-sectional view taken along the line II of FIG. FIG. 38 (c) is a plan view of FIG. 38 (a).
【図39】従来の開閉器として例えば回路遮断器の開成
時状態を示す側面図である。FIG. 39 is a side view showing an open state of a conventional circuit breaker, for example, a circuit breaker.
【図40】図39の回路遮断器の接点開離直後の状態を
示す側面図である。FIG. 40 is a side view showing a state of the circuit breaker of FIG. 39 immediately after a contact is opened.
【図41】図40の回路遮断器における可動接触子の最
大開離状態を示す側面図である。FIG. 41 is a side view showing a state in which a movable contact in the circuit breaker of FIG. 40 is in a maximum open state.
1 可動接触子 2 可動接点 3 固定接点 4 固定接触子 4a 第1導体部 4d 第3導体部 4e 第2導体部 7 消弧側板 15 絶縁物 DESCRIPTION OF SYMBOLS 1 Movable contact 2 Movable contact 3 Fixed contact 4 Fixed contact 4a 1st conductor part 4d 3rd conductor part 4e 2nd conductor part 7 Arc extinguishing side plate 15 Insulator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 仁科 健一 福山市緑町1番8号 三菱電機株式会社 福山製作所内 (72)発明者 山県 伸示 福山市緑町1番8号 三菱電機株式会社 福山製作所内 (56)参考文献 特開 平4−262334(JP,A) 特開 昭62−123627(JP,A) 実開 昭62−88351(JP,U) (58)調査した分野(Int.Cl.6,DB名) H01H 69/00 - 83/22 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenichi Nishina 1-8 Midoricho, Fukuyama City Mitsubishi Electric Corporation Fukuyama Works (72) Inventor Shinji Yamagata 1-8 Midorimachi Fukuyama City Mitsubishi Electric Corporation Fukuyama Works ( 56) References JP-A-4-262334 (JP, A) JP-A-62-123627 (JP, A) JP-A-62-88351 (JP, U) (58) Fields investigated (Int. Cl. 6 , (DB name) H01H 69/00-83/22
Claims (5)
と、この可動接触子の開閉動作で前記可動接点と接離可
能な固定接点を一端部に有する固定接触子とを備え、こ
の固定接触子に電源系統を接続する開閉器において、前
記接点の開閉方向を上下方向とした時、前記固定接触子
を、前記電源系統に接続する第1導体部、前記固定接点
を有する第2導体部、及びそれらの第1導体部と第2導
体部を上下方向に接続する第3導体部とで構成し、前記
第3導体部を前記固定接点の位置より可動接触子の可動
接点が設けられていない他端部側で且つ前記電源系統の
反対側に配置し、前記第1導体部は、前記接点閉成時に
該接点接触面より上方に配置すると共に、前記接点開成
時に前記可動接点の接触面より下方に配置し、前記接点
開成時に前記可動接点表面から見渡せる前記第1導体部
の部位を絶縁物で被覆すると共に、前記可動接触子が開
閉時の可動接点の軌跡を含む平面の両側に消弧側板を配
置し、これらの消弧側板の少なくとも一方を前記平面と
前記第1導体部の平面に対応する部分の間に設置したこ
とを特徴とする開閉器。A movable contact having a movable contact at one end thereof; and a fixed contact having a fixed contact at one end capable of coming into contact with and separating from the movable contact when the movable contact is opened and closed. In a switch for connecting a power supply system to a contact, when the opening and closing direction of the contacts is set to a vertical direction, the fixed contact is connected to the power supply system, a first conductor portion, a second conductor portion having the fixed contact, And a third conductor portion connecting the first conductor portion and the second conductor portion in the vertical direction, and the third conductor portion is not provided with a movable contact of a movable contact from the position of the fixed contact. The first conductor portion is disposed on the other end side and on the opposite side of the power supply system, and is disposed above the contact contact surface when the contact is closed, and is disposed above the contact surface of the movable contact when the contact is opened. Disposed below, and the movable contact is provided when the contact is opened. A portion of the first conductor portion, which can be seen from the surface, is covered with an insulator, and the movable contacts have arc extinguishing side plates disposed on both sides of a plane including the locus of the movable contact at the time of opening and closing. A switch, wherein one of the switches is provided between the plane and a portion corresponding to the plane of the first conductor portion.
状態時の可動接点が上方に突出するように形成されてい
ることを特徴とする請求項1記載の開閉器。2. The switch according to claim 1, wherein the arc-extinguishing side plate is formed such that a movable contact when the movable contact is in an open state protrudes upward.
記第1導体部の高さ範囲を越えないように形成されてい
ることを特徴とする請求項1記載の開閉器。3. The switch according to claim 1, wherein the arc-extinguishing side plate is formed such that an upper side of the arc-extinguishing side plate does not exceed a height range of the first conductor portion.
記第1導体部の高さ範囲を越えず、且つ、前記消弧側板
の下端が前記固定接点より上方に位置するように形成さ
れていることを特徴とする請求項1記載の開閉器。4. An arc extinguishing side plate such that an upper side of the arc extinguishing side plate does not exceed a height range of the first conductor portion and a lower end of the arc extinguishing side plate is positioned above the fixed contact. The switch according to claim 1, wherein the switch is formed.
距離を幅とする時、これらの消弧側板が前記可動接点の
軌跡より電源系統側では前記軌跡に対向する部分の幅よ
り狭い幅を持つ部分が設けられていることを特徴とする
請求項1記載の開閉器。5. When the distance between the arc-extinguishing side plates is a width, the width of a portion of the arc-extinguishing side plates opposed to the locus on the power supply system side relative to the locus of the movable contact is defined as a width. 2. The switch according to claim 1, wherein a portion having a smaller width is provided.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30968392A JP2918752B2 (en) | 1992-10-23 | 1992-10-23 | Switch |
US08/076,741 US5583328A (en) | 1992-07-02 | 1993-06-15 | High voltage switch including U-shaped, slitted stationary contact assembly with arc extinguishing/magnetic blowout features |
EP93110049A EP0576992B1 (en) | 1992-07-02 | 1993-06-23 | Switch |
DE69328444T DE69328444T3 (en) | 1992-07-02 | 1993-06-23 | switch |
DE69315384T DE69315384T2 (en) | 1992-07-02 | 1993-06-23 | counter |
EP95113702A EP0698899B2 (en) | 1992-07-02 | 1993-06-23 | Switch |
KR93012316A KR0128485B1 (en) | 1992-07-02 | 1993-07-01 | Switch |
US08/434,529 US5596184A (en) | 1992-07-02 | 1995-05-04 | Switch including a moving element, a repelling element and a conductor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30968392A JP2918752B2 (en) | 1992-10-23 | 1992-10-23 | Switch |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06139908A JPH06139908A (en) | 1994-05-20 |
JP2918752B2 true JP2918752B2 (en) | 1999-07-12 |
Family
ID=17996024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP30968392A Expired - Fee Related JP2918752B2 (en) | 1992-07-02 | 1992-10-23 | Switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2918752B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4140204B2 (en) * | 2001-03-12 | 2008-08-27 | 三菱電機株式会社 | Current limiting mechanism and circuit breaker having the same |
US8168911B2 (en) * | 2008-09-19 | 2012-05-01 | General Electric Company | Circuit breaker with improved arc quenching |
-
1992
- 1992-10-23 JP JP30968392A patent/JP2918752B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH06139908A (en) | 1994-05-20 |
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