JPH1125836A - Circuit breaker - Google Patents

Circuit breaker

Info

Publication number
JPH1125836A
JPH1125836A JP17199397A JP17199397A JPH1125836A JP H1125836 A JPH1125836 A JP H1125836A JP 17199397 A JP17199397 A JP 17199397A JP 17199397 A JP17199397 A JP 17199397A JP H1125836 A JPH1125836 A JP H1125836A
Authority
JP
Japan
Prior art keywords
arc
contact
drive coil
circuit breaker
grid plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP17199397A
Other languages
Japanese (ja)
Inventor
Kazuhiro Nakamura
一裕 中村
Yukinori Somekawa
幸範 染川
Kazuo Kuwamura
和男 桑村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Toshiba FA Systems Engineering Corp
Original Assignee
Toshiba Corp
Toshiba FA Systems Engineering Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Toshiba FA Systems Engineering Corp filed Critical Toshiba Corp
Priority to JP17199397A priority Critical patent/JPH1125836A/en
Publication of JPH1125836A publication Critical patent/JPH1125836A/en
Pending legal-status Critical Current

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Abstract

PROBLEM TO BE SOLVED: To enhance arc-extinguishing performance of an arc which is generated between contacts, when a circuit is shut off by arranging a driving oil on the innermost side of an arc-extinguishing device. SOLUTION: The tip parts of parts 23a, extending in the terminal direction on the load side of a grid plate 23 in the position corresponding to an arc generating between at least contacts 19, 21, of the grid plate 23 of an arc- extinguishing device 13, are arranged in the positions on both sides of the contacts 19, 21, or in the positions in the terminal direction on the load side rather than at the position on the both sides. Thereby, the magnetic flux generated by arc itself and the magnetic flux generated by a current flowing through a drive coil 16 are concentrated on the parts 23, and the density of the magnetic flux acting to the arc is increased. The area of the grid plate 23 is increased by the part 23a extending in the terminal direction on the load side of the grid plate 23, and the cooling effect for cooling the arc with the grid plate 23 is enhanced.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は遮断時に両接点間に
発生するアークを消弧装置の奥側に駆動する駆動コイル
を具えた回路遮断器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker provided with a drive coil for driving an arc generated between both contacts at the time of interruption, to the back of an arc extinguishing device.

【0002】[0002]

【従来の技術】一般に、この種の回路遮断器において
は、図18に示すように、固定接触子1の先端側(図で
右側)に設けられた固定接点2と、可動接触子3の先端
側(図で左側)に設けられた可動接点4とで接点が構成
されている。又、固定接触子1は、基端側(図で左側)
に電源側端子部5を有しており、一方、可動接触子3の
基端部(図で右側)は図示しないトリップ装置を介して
負荷側端子に接続されている。
2. Description of the Related Art Generally, in a circuit breaker of this type, as shown in FIG. 18, a fixed contact 2 provided on the tip side (right side in the figure) of a fixed contact 1 and a tip of a movable contact 3 are provided. The movable contact 4 provided on the side (left side in the figure) forms a contact. The fixed contact 1 is located on the base end side (left side in the figure).
Has a power supply side terminal portion 5, while a base end portion (right side in the figure) of the movable contact 3 is connected to a load side terminal via a trip device (not shown).

【0003】これにて、電源側端子部5と負荷側端子と
の間の電路に短絡電流等の異常電流が流れたときには、
トリップ装置によって可動接触子3が支点部3aを中心
に上方に回動されることにより、可動接点4を固定接点
2から引離して接点を開放するようになっている。そし
て、このとき、接点2,4間に発生したアークは、消弧
装置6によって分断されて消弧されるようになってい
る。この消弧装置6は、接点部分を挟むように設けられ
た両支持絶縁物7(一方のみ図示)間に複数枚のグリッ
ド板8を上下に多段に掛け渡して配置して成るものであ
る。
[0003] When an abnormal current such as a short-circuit current flows in the electric circuit between the power supply side terminal portion 5 and the load side terminal,
When the movable contact 3 is rotated upward about the fulcrum 3a by the trip device, the movable contact 4 is separated from the fixed contact 2 to open the contact. At this time, the arc generated between the contacts 2 and 4 is divided and extinguished by the arc extinguishing device 6. The arc extinguishing device 6 is configured by arranging a plurality of grid plates 8 between two supporting insulators 7 (only one of which is shown) provided so as to sandwich a contact portion, in a vertically cascaded manner.

【0004】そして更に、前記消弧装置6の外側には、
逆U字形の駆動コイル9が例えば固定接触子1と一体に
設けられており、これにて、駆動コイル9に流れる電流
により生ずる磁界と、接点間に発生するアークとの相互
作用(ローレンツ力)により、アークを消弧装置6の奥
側に向けて駆動し、もって、アークがより速やかに引延
ばし駆動されて消弧されるようになるのである。
Further, outside the arc extinguishing device 6,
An inverted U-shaped drive coil 9 is provided, for example, integrally with the fixed contact 1, whereby an interaction (Lorentz force) between a magnetic field generated by a current flowing through the drive coil 9 and an arc generated between the contacts. Accordingly, the arc is driven toward the far side of the arc extinguishing device 6, whereby the arc is more quickly extended and driven to extinguish the arc.

【0005】[0005]

【発明が解決しようとする課題】図19は上述の駆動コ
イル9に流れる電流I1 により生ずる磁束と、接点間に
発生したアークA1 により生ずる磁束とによる磁界B1
を示している。この図19で明らかなように、接点間に
発生したアークA1 には、アークA1 自体により生ずる
磁束に加えて、駆動コイル9に流れる電流I1 により生
ずる磁束が有効に作用するものの、その磁束密度は大き
いほどアークの引延ばし駆動に効果があるものであり、
その駆動力の大きいものが望まれている。
FIG. 19 shows a magnetic field B1 generated by the magnetic flux generated by the current I1 flowing through the driving coil 9 and the magnetic flux generated by the arc A1 generated between the contacts.
Is shown. As apparent from FIG. 19, in addition to the magnetic flux generated by the arc A1 itself, the magnetic flux generated by the current I1 flowing through the drive coil 9 effectively acts on the arc A1 generated between the contacts, but the magnetic flux density is The larger the value, the more effective the arc stretching drive is,
What has the large driving force is desired.

【0006】本発明は上述の要望を満たすべくなされた
ものであり、従ってその目的は、アークに作用する磁束
の密度を更に大きくして、アーク駆動力を向上させ、併
せてアークの冷却効果をも向上させ得て、消弧性能を充
分に向上させることのできる回路遮断器を提供するにあ
る。
SUMMARY OF THE INVENTION The present invention has been made to satisfy the above-mentioned demands, and accordingly, has as its object to further increase the density of magnetic flux acting on the arc, improve the arc driving force, and simultaneously reduce the arc cooling effect. Another object of the present invention is to provide a circuit breaker that can improve the arc extinguishing performance and can sufficiently improve the arc extinguishing performance.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
に、本発明の回路遮断器は、消弧装置の外側に駆動コイ
ルを設けたものにおいて、消弧装置のグリッド板のう
ち、少なくとも接点間に発生するアークと対応する位置
のグリッド板のそれぞれ負荷側端子方向に延びた部分の
先端部を、接点の両側位置に、又はそれよりも負荷側端
子方向の位置に配置したことを特徴とする。
In order to achieve the above object, a circuit breaker according to the present invention is provided with a drive coil provided outside the arc extinguishing device. The end portions of the portions of the grid plate extending in the load-side terminal direction corresponding to the arcs generated between them are arranged at both side positions of the contact or at positions further in the load-side terminal direction. I do.

【0008】このものによれば、少なくとも接点間に発
生するアークと対応する位置のグリッド板のそれぞれ負
荷側端子方向に延びた部分に、アーク自体により生ずる
磁束と、駆動コイルに流れる電流により生ずる磁束とが
集中して流れ、これによって、アークに作用する磁束の
密度が増す。又、そのグリッド板のそれぞれ負荷側端子
方向に延びた部分の分、グリッド板の大きさが増し、ア
ークをグリッド板で冷却する冷却効果が向上する。
According to this structure, the magnetic flux generated by the arc itself and the magnetic flux generated by the current flowing through the drive coil are provided at least in the portions of the grid plate at positions corresponding to the arc generated between the contacts, each extending in the direction of the load terminal. Flows in a concentrated manner, thereby increasing the density of magnetic flux acting on the arc. Further, the size of the grid plate is increased by the portion of each grid plate extending in the direction of the load side terminal, and the cooling effect of cooling the arc by the grid plate is improved.

【0009】[0009]

【発明の実施の形態】以下、本発明の第1実施例につ
き、図1ないし図7を参照して説明する。まず、本実施
例に係る回路遮断器の全体構成について簡単に述べる
と、この回路遮断器は、図示しない絶縁材製のケースの
片側内部に消弧室を有し、その消弧室の内部に図1及び
図2に示す固定接触子11と可動接触子12及び消弧装
置13を配設している。又、ケースの消弧室隣の部分の
内部には、図示しないトリップ装置、操作ハンドル等を
設けている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. First, the overall configuration of the circuit breaker according to the present embodiment will be briefly described. This circuit breaker has an arc extinguishing chamber inside one side of a case made of an insulating material (not shown). The fixed contact 11, the movable contact 12, and the arc extinguishing device 13 shown in FIGS. 1 and 2 are provided. Further, a trip device, an operation handle, and the like (not shown) are provided inside a portion adjacent to the arc extinguishing chamber of the case.

【0010】上記固定接触子11は、詳細には、図3に
も示すように、基端側(図で左側部)に電源側端子部1
4を有し、先端側(図で右側部)に固定接点板15を有
するもので、該固定接点板15の両側方部に駆動コイル
16を有している。このうち、駆動コイル16はともに
ほゞ逆U字形にて、その各両下部を連結部17,18に
より連ねており、その一方(図1及び図2で左側)の連
結部17から電源側端子部14を起立させている。又、
他方(図1及び図2で右側)の連結部18から固定接点
板15を起立させている。
More specifically, as shown in FIG. 3, the fixed contact 11 is provided at the base end side (the left side in the figure) with the power supply terminal 1.
4 and a fixed contact plate 15 on the front end side (right side in the figure), and a drive coil 16 on both sides of the fixed contact plate 15. The drive coil 16 is substantially U-shaped, and its lower portions are connected to each other by connecting portions 17 and 18. One of the connecting portions 17 (the left side in FIGS. 1 and 2) is connected to the power supply terminal. The part 14 is erected. or,
The fixed contact plate 15 is erected from the connecting portion 18 on the other side (right side in FIGS. 1 and 2).

【0011】なお、固定接触子11は上述の各部分を一
体に形成し、又は別体で結合して構成したもので、固定
接点板15の上面には固定接点19を設けている。又、
その各部分の中でも、特に駆動コイル16は例えば鍛造
により形成しており、その厚さTより幅W1 を大きくし
ている(T<W1 )。更に、前述のケースに配設した状
態では、電源側端子部14をケース外に露出させてい
る。
The fixed contact 11 is formed by integrally forming the above-mentioned parts or by combining them separately. A fixed contact 19 is provided on the upper surface of the fixed contact plate 15. or,
Among these parts, the drive coil 16 is formed, for example, by forging, and the width W1 is larger than the thickness T (T <W1). Further, in a state where the power supply side terminal portion 14 is disposed in the case, the power supply side terminal portion 14 is exposed outside the case.

【0012】一方、可動接触子12は、基端側(図1及
び図2で右側部)を軸20により枢支して、これを中心
に上下に回動可能に設けており、先端側(図1及び図2
で左側部)に上記固定接点19に接離する可動接点21
を有している。なお、この可動接触子12は基端側が前
記ケースの消弧室隣の部分の内部に位置するもので、先
端側をその位置より消弧室の壁を貫通して消弧室の内部
に位置させている。又、前記駆動コイル16は前記固定
接点板15の両側方部に位置すると共に可動接触子12
の先端部の両側にも位置するもので、該可動接触子12
の先端部と対応している。
On the other hand, the movable contact 12 has its base end (right side in FIGS. 1 and 2) pivotally supported by a shaft 20 and is provided so as to be rotatable up and down around the shaft. 1 and 2
Movable contact 21 which comes into contact with and separates from the fixed contact 19
have. The movable contact 12 has its base end located inside the portion of the case adjacent to the arc-extinguishing chamber, and its tip end penetrates through the wall of the arc-extinguishing chamber from that position and is located inside the arc-extinguishing chamber. Let me. Further, the drive coil 16 is located on both sides of the fixed contact plate 15 and the movable contact 12
Are located on both sides of the tip of the movable contact 12.
It corresponds to the tip of.

【0013】ここで、前記トリップ装置は、周知のよう
に過電流引外し装置やトグルリンク機構部等を具えて構
成され、前記可動接触子12の基端部は、前記過電流引
外し装置を介してケースの外面に露出する負荷側端子に
電気的に接続されている。又、上記トグルリンク機構部
は、可動接触子12に機械的に接続されており、前記操
作ハンドルにも連結されている。これにて、主回路(前
記電源側端子部14と負荷側端子との間)に異常電流が
流れると、過電流引外し装置がそれを検出してトグルリ
ンク機構部を作動させ、可動接触子12が開離方向であ
る上方に移動されて接点が開放されるのである。尚、回
路の閉成時には、可動接触子12は図示しないばねによ
り下方に付勢され、可動接点21が固定接点19に圧接
するようになっている。
Here, the trip device is provided with an overcurrent trip device, a toggle link mechanism, and the like, as is well known, and the base end of the movable contact 12 is provided with the overcurrent trip device. It is electrically connected to a load-side terminal exposed on the outer surface of the case via the terminal. Further, the toggle link mechanism is mechanically connected to the movable contact 12 and also to the operation handle. As a result, when an abnormal current flows in the main circuit (between the power-supply-side terminal portion 14 and the load-side terminal), the overcurrent trip device detects the current and activates the toggle link mechanism to activate the movable contact. 12 is moved upward, which is the separating direction, and the contact is opened. When the circuit is closed, the movable contact 12 is urged downward by a spring (not shown), and the movable contact 21 is pressed against the fixed contact 19.

【0014】そして、前記消弧装置13は、接点部(固
定接点19及び可動接点21)の両側を挟むように設け
られた2枚の例えば消弧性の樹脂から成る支持絶縁物2
2の間に、磁性材製の複数枚のグリッド板23を上記可
動接点21の移動方向である上下に多段に掛け渡すよう
に取付けて構成しており、駆動コイル16はその両支持
絶縁物22の外側に位置している。しかして、グリッド
板23には、上面から見てほゞU字状の切欠部24を形
成しており、この切欠部24の両側の部分23aは上記
負荷側端子方向に延びていて、その各先端部を、接点部
に最も近い下部では該接点部の両側に、又、それより上
方の上部では接点部よりも負荷側端子方向の位置に配置
している。
The arc extinguishing device 13 includes two support insulators 2 made of, for example, an arc-extinguishing resin provided so as to sandwich both sides of the contact portion (fixed contact 19 and movable contact 21).
2, a plurality of grid plates 23 made of a magnetic material are attached so as to be bridged in multiple stages above and below the moving direction of the movable contact 21. Is located outside. The grid plate 23 has a substantially U-shaped notch 24 when viewed from above, and the portions 23a on both sides of the notch 24 extend in the load-side terminal direction. The tip portion is disposed on both sides of the contact portion at a lower portion closest to the contact portion, and at a position closer to the load side terminal than the contact portion at an upper portion above the contact portion.

【0015】次に、上記構成のものの作用を述べる。図
4(a)に示す接点の閉成状態から、主回路(電源側端
子部14と負荷側端子との間)に異常電流I11が流れる
と、前述のように、トリップ装置により可動接触子12
が開離方向に移動されて接点が開放されるものであり、
この接点の開放に伴い、固定接点19と可動接点21と
の間には、図4(b)及び図5に示すようにアークA11
が発生する。又、このとき、駆動コイル16に流れる電
流I11により、駆動コイル16の周りに磁界B11が発生
する。
Next, the operation of the above configuration will be described. When the abnormal current I11 flows in the main circuit (between the power supply terminal 14 and the load terminal) from the closed state of the contact shown in FIG. 4A, as described above, the movable contact 12
Is moved in the separating direction to open the contact,
With the opening of the contact, an arc A11 is provided between the fixed contact 19 and the movable contact 21 as shown in FIGS.
Occurs. At this time, a magnetic field B11 is generated around the drive coil 16 by the current I11 flowing through the drive coil 16.

【0016】そして、開離した可動接点21(可動接触
子12)は、固定接点板15に流れる電流I11の方向と
可動接触子12に流れる電流I11の方向とが反対である
ことによる反発力により全開離位置まで移動し、このと
き、アークA11は、前記磁界B11との相互作用であるロ
ーレンツ力により、消弧装置13のグリッド板23の奥
側に向けて付勢される。これにより、アークA11は、図
4(c)に示すように、グリッド板23により急速に引
延ばされ、分断されて速やかに消弧される。
The separated movable contact 21 (movable contact 12) is repelled by the repulsive force caused by the direction of the current I11 flowing through the fixed contact plate 15 and the direction of the current I11 flowing through the movable contact 12 being opposite. The arc A11 moves to the fully opened position, and at this time, the arc A11 is urged toward the back side of the grid plate 23 of the arc extinguishing device 13 by Lorentz force which is an interaction with the magnetic field B11. As a result, the arc A11 is rapidly extended by the grid plate 23 as shown in FIG.

【0017】図6は上述の駆動コイル16に流れる電流
I11により生ずる磁束と、接点間に発生したアークA11
により生ずる磁束とによる磁界B12を示している。この
図6で明らかなように、接点間に発生したアークA11に
は、アークA11自体により生ずる磁束に加えて、駆動コ
イル16に流れる電流I11により生ずる磁束が有効に作
用するもので、上記構成のものの場合、接点の両側位置
に、又はそれよりも負荷側端子方向の位置に、消弧装置
13のグリッド板23のそれぞれ負荷側端子方向に延び
た部分23aの先端部を配置しているので、その部分2
3aに、アークA11自体により生ずる磁束と、駆動コイ
ル16に流れる電流I11により生ずる磁束とが集中して
流れ、これによって、アークA11に作用する磁束の密度
が増し、アークA11を消弧装置13のグリッド板23の
奥側に向けて付勢するローレンツ力が増す。
FIG. 6 shows the magnetic flux generated by the current I11 flowing through the driving coil 16 and the arc A11 generated between the contacts.
And a magnetic field B12 due to the magnetic flux generated by the magnetic field. As is apparent from FIG. 6, the magnetic flux generated by the current I11 flowing through the drive coil 16 effectively acts on the arc A11 generated between the contacts in addition to the magnetic flux generated by the arc A11 itself. In the case of the arc-extinguishing device, the distal ends of the portions 23a of the grid plate 23 of the arc extinguishing device 13 that extend in the direction of the load-side terminals are arranged at both sides of the contact or at positions closer to the load-side terminals. Part 2
3a, the magnetic flux generated by the arc A11 itself and the magnetic flux generated by the current I11 flowing through the drive coil 16 flow in a concentrated manner, whereby the density of the magnetic flux acting on the arc A11 increases, and the arc A11 is removed from the arc extinguishing device 13. Lorentz force urging toward the back side of the grid plate 23 increases.

【0018】かくして、アークA11の引延ばし駆動力を
向上させることができるものであり、図7は、それを証
明すべく、消弧装置13のグリッド板23の先端部の位
置を変化させた場合のアーク駆動力の違いを、三次元有
限要素解析を行った結果で示している。これから分かる
ように、アーク駆動力は、消弧装置13のグリッド板2
3の先端部を接点の両側位置に配置した場合に大きくな
り、それより更に負荷側端子方向の位置に配置した場合
には、大きいものの、その大きくなる変化度合は小さい
(変化が飽和している)。
Thus, the driving force for extending the arc A11 can be improved. FIG. 7 shows the case where the position of the tip of the grid plate 23 of the arc extinguishing device 13 is changed to prove this. The difference of the arc driving force is shown by the result of the three-dimensional finite element analysis. As can be seen, the arc driving force is controlled by the grid plate 2 of the arc extinguishing device 13.
3 becomes larger when the tip of the contact 3 is disposed on both sides of the contact, and when it is disposed further in the direction of the terminal on the load side, the change is large, but the degree of change is small (the change is saturated). ).

【0019】加えて、グリッド板23のそれぞれ負荷側
端子方向に延びた部分23aの分、グリッド板23の大
きさが増すもので、これにより、アークA11をグリッド
板23で冷却する冷却効果を向上させることができる。
そして、このアークA11についての冷却効果を向上させ
得ることと、上述のアーク駆動力を大きくできることと
により、消弧性能を充分に向上させることができるので
ある。
In addition, the size of the grid plate 23 is increased by the portion 23a of the grid plate 23 extending in the direction of the load terminal, thereby improving the cooling effect of cooling the arc A11 by the grid plate 23. Can be done.
The ability to improve the cooling effect of the arc A11 and the ability to increase the above-described arc driving force can sufficiently improve the arc extinguishing performance.

【0020】なお、消弧装置13のグリッド板23の先
端部の位置が接点より更に負荷側端子方向に位置するも
のについては、アーク駆動力が大きくなる変化度合は小
さいものの、グリッド板23の大きさをそれだけ一層大
きくできるもので、これによりアークA11についての冷
却効果を更に増し得るから、消弧性能を一層向上させる
ことができる。
When the tip of the grid plate 23 of the arc extinguishing device 13 is located further in the direction of the load terminal than the contact point, the degree of change in which the arc driving force increases is small, but the size of the grid plate 23 is small. Therefore, the cooling effect of the arc A11 can be further increased, so that the arc extinguishing performance can be further improved.

【0021】更に、上記構成のものの場合、駆動コイル
16の幅W1 を厚さTより大きくしており、その幅W1
の大きさによって、駆動コイル16の通電に必要な断面
積を確保でき、その分、厚さTを小さくできるので、こ
れにより、駆動コイル16間のスペースを広く確保で
き、消弧装置13のグリッド板23の大きさ(幅)を大
きくすることができる。よって、アークA11をグリッド
板23で冷却する冷却効果を更に向上させ得るものであ
り、もって、消弧性能を一層向上させることができる。
Further, in the case of the above configuration, the width W1 of the drive coil 16 is larger than the thickness T, and the width W1
, The cross-sectional area necessary for energizing the drive coil 16 can be secured, and the thickness T can be reduced accordingly, so that a large space between the drive coils 16 can be secured and the grid of the arc extinguishing device 13 can be secured. The size (width) of the plate 23 can be increased. Therefore, the cooling effect of cooling the arc A11 by the grid plate 23 can be further improved, and the arc extinguishing performance can be further improved.

【0022】又、消弧装置13の支持絶縁物22は消弧
性の樹脂により形成しており、これによっても消弧性能
を向上させることができる。なお、先端部を、接点の両
側位置に、又はそれよりも負荷側端子方向の位置に配置
する消弧装置13のグリッド板23は、少なくとも接点
間に発生するアークA11と対応する位置のグリッド板2
3であれば良く、それ以外のグリッド板23はそれより
も小さいものであっても良い。
Further, the supporting insulator 22 of the arc extinguishing device 13 is formed of an arc extinguishing resin, which can also improve the arc extinguishing performance. In addition, the grid plate 23 of the arc extinguishing device 13 in which the front end is disposed at both sides of the contact or at a position closer to the load terminal than the contact is at least a grid plate at a position corresponding to the arc A11 generated between the contacts. 2
3, and the other grid plates 23 may be smaller.

【0023】以上に対して、図8は本発明の第2実施例
を示すもので、以下、第1実施例と相違する点のみを述
べる。このものの場合、前述の駆動コイル16に代えて
用いる駆動コイル31の高さを可動接触子12の全開離
時の位置より低く設定し、それより上方のグリッド板3
2の幅を下方のグリッド板23の幅より大きくしてい
る。
FIG. 8 shows a second embodiment of the present invention. Only the differences from the first embodiment will be described below. In this case, the height of the drive coil 31 used in place of the above-described drive coil 16 is set lower than the position of the movable contact 12 at the time of full opening, and the grid plate 3 above it is set.
2 is larger than the width of the lower grid plate 23.

【0024】これにより、駆動コイル31に流れる電流
による磁界を固定接点19周りに集中させて発生させる
ことができ、これによってアークを発生初期でより有効
に駆動することができる。又、この場合、上方のグリッ
ド板32の幅を下方のグリッド板23の幅より大きくし
た分、アークについての冷却効果を増すことができ、総
じて、消弧性能を一層向上させることができる。なお、
この場合、グリッド板23,32の幅の違いに合わせ
て、それらを支持する支持絶縁物も、下部より上部が間
隔が広くなる段部33aを有する支持絶縁物33を用い
ている。又、この場合、駆動コイル31は支持絶縁物3
3の下部の外側に位置するものである。
As a result, the magnetic field caused by the current flowing through the drive coil 31 can be concentrated and generated around the fixed contact 19, whereby the arc can be driven more effectively in the initial stage of generation. Further, in this case, the cooling effect of the arc can be increased by an amount corresponding to the width of the upper grid plate 32 being made larger than the width of the lower grid plate 23, and the arc extinguishing performance can be further improved as a whole. In addition,
In this case, according to the difference in the width of the grid plates 23 and 32, the supporting insulator 33 having a stepped portion 33a whose upper portion is wider than its lower portion is also used as the supporting insulator for supporting them. In this case, the drive coil 31 is
3 is located outside the lower part.

【0025】図9は本発明の第3実施例を示すもので、
これも以下、第1実施例と相違する点のみを述べる。こ
のものの場合、グリッド板23,32を可動接点21の
移動軌跡とほゞ直角に配置している。これにより、磁束
が電流の周りに直角に生じることに沿い、接点間に発生
したアークによる磁束をグリッド板23,32に効率良
く生じさせ得るから、アーク駆動力を増すことができ、
消弧性能を一層向上させることができる。
FIG. 9 shows a third embodiment of the present invention.
Hereinafter, only differences from the first embodiment will be described. In this case, the grid plates 23 and 32 are arranged substantially at right angles to the movement locus of the movable contact 21. As a result, the magnetic flux due to the arc generated between the contacts can be efficiently generated in the grid plates 23 and 32 along with the magnetic flux being generated at right angles around the current, so that the arc driving force can be increased,
Arc extinguishing performance can be further improved.

【0026】なお、この可動接点21の移動軌跡とほゞ
直角に配置するグリッド板23,32も、少なくとも接
点間に発生するアークと対応する位置のグリッド板2
3,32であれば良く、それ以外のグリッド板23,3
2は可動接点21の移動軌跡とほゞ直角に配置されてい
なくても良い。
The grid plates 23 and 32 arranged at a right angle to the movement locus of the movable contact 21 also have a grid plate 2 at a position corresponding to at least an arc generated between the contacts.
3, 32, other grid plates 23, 3
The reference numeral 2 does not have to be arranged at a right angle to the movement locus of the movable contact 21.

【0027】図10は本発明の第4実施例を示すもの
で、これも以下、第1実施例と相違する点のみを述べ
る。このものの場合、前述の駆動コイル16に代えて用
いる駆動コイル41の上部41aとその近辺のグリッド
板23,32とをほゞ平行に(ほゞ同角度で)設けてい
る。これにより、駆動コイル41の上部41a近辺のグ
リッド板23,32を、駆動コイル41の上部41aの
角度にかかわりなく充分に大きくすることができ、その
分、アークについての冷却効果を増すことができるの
で、やはり消弧性能を一層向上させることができる。
FIG. 10 shows a fourth embodiment of the present invention, and only the differences from the first embodiment will be described below. In this case, the upper portion 41a of the drive coil 41 used in place of the above-described drive coil 16 and the grid plates 23 and 32 in the vicinity thereof are provided substantially in parallel (at substantially the same angle). Thus, the grid plates 23 and 32 near the upper portion 41a of the drive coil 41 can be made sufficiently large regardless of the angle of the upper portion 41a of the drive coil 41, and the cooling effect on the arc can be increased accordingly. Therefore, the arc extinguishing performance can be further improved.

【0028】図11及び図12は本発明の第5実施例を
示すもので、これも以下、第1実施例と相違する点のみ
を述べる。このものの場合、前述の駆動コイル16に代
えて用いる駆動コイル51の上部51aを接点側に折曲
している。これにより、接点間に発生したアークの経路
に、駆動コイル51に流れる電流の経路が近付き、その
電流による磁束がアークに密度高く作用するから、アー
ク駆動力が増大する。
FIGS. 11 and 12 show a fifth embodiment of the present invention. Only the differences from the first embodiment will be described below. In this case, the upper part 51a of the drive coil 51 used in place of the drive coil 16 is bent to the contact side. Accordingly, the path of the current flowing through the drive coil 51 approaches the path of the arc generated between the contacts, and the magnetic flux due to the current acts on the arc at a high density, so that the arc driving force increases.

【0029】又、この場合、駆動コイル51の上部51
aが可動接触子12の上方に位置して、それと同方向に
電流が流れるため、それらの間には吸引力が働く。よっ
て、異常電流が流れれば、その吸引力により可動接触子
12が固定接触子11から素早く開離し、アークの延び
るのが速くなるので、やはり消弧性能を一層向上させる
ことができる。
In this case, the upper part 51 of the drive coil 51
Since a is located above the movable contact 12 and current flows in the same direction as the movable contact 12, a suction force acts between them. Therefore, when an abnormal current flows, the movable contact 12 is quickly separated from the fixed contact 11 by the attraction force, and the arc extends faster, so that the arc extinguishing performance can be further improved.

【0030】なお、このものの場合、図12に示すよう
に、駆動コイル51には専用の絶縁物52を設けて上部
51aまでを覆い、可動接触子12との間の絶縁をして
いる。又、駆動コイル51は、その高さを前記第2実施
例同様に可動接触子12の全開離時の位置より低く設定
しており、これによって、やはり第2実施例同様に駆動
コイル51より上方のグリッド板32の幅を下方のグリ
ッド板23の幅より大きくしているが、更に、それらの
グリッド板23,32を別個の支持絶縁物53,54に
より支持し、そのうちのグリッド板23を支持絶縁物5
3と共に駆動コイル51の上部51aより下方の部分に
挿入配設している。従って、このものの場合、駆動コイ
ル31は下方の支持絶縁物53の外側に位置するもので
ある。
In this case, as shown in FIG. 12, a dedicated insulator 52 is provided on the drive coil 51 to cover up to the upper portion 51a, thereby insulating the movable coil 12 from the movable contact 12. The height of the drive coil 51 is set lower than the position of the movable contact 12 when the movable contact 12 is fully opened, as in the second embodiment. The width of the grid plate 32 is made larger than the width of the lower grid plate 23. Further, the grid plates 23, 32 are supported by separate support insulators 53, 54, and the grid plate 23 is supported. Insulator 5
Along with 3, it is inserted and arranged in a portion below the upper part 51 a of the drive coil 51. Therefore, in this case, the drive coil 31 is located outside the lower supporting insulator 53.

【0031】図13は本発明の第6実施例を示すもの
で、これも以下、第1実施例と相違する点のみを述べ
る。このものの場合、前述の駆動コイル16に代えて用
いる駆動コイル61の上部61aを、接点側に、下部と
ほゞ平行に折曲している。これにより、第5実施例同様
の作用効果が得られる上に、グリッド板23を支持絶縁
物53と共に、可動接触子12側(図では右側)から、
駆動コイル61の上部61aより下方の部分に挿入配置
することが、上記第5実施例のものより容易となり、組
立性を良くできるという一層の効果が得られる。
FIG. 13 shows a sixth embodiment of the present invention. Only the differences from the first embodiment will be described below. In this case, the upper part 61a of the drive coil 61 used in place of the above-described drive coil 16 is bent to the contact side almost in parallel with the lower part. Accordingly, the same operation and effect as those of the fifth embodiment can be obtained, and the grid plate 23 and the supporting insulator 53 are moved from the movable contact 12 side (the right side in the drawing).
It is easier to insert and arrange the drive coil 61 below the upper portion 61a of the drive coil 61 than in the above-described fifth embodiment, and a further effect of improving the assemblability can be obtained.

【0032】又、この場合、駆動コイル61の上部61
aより下方の部分は接点寄りの部分であって、そこに挿
入配置するグリッド板23の枚数を上記第5実施例のも
のより多くすることもできるから、アークについての冷
却効果を増すことができて、やはり消弧性能を一層向上
させることができる。
In this case, the upper portion 61 of the drive coil 61
The portion below a is closer to the contact, and the number of grid plates 23 inserted and arranged there can be made larger than that of the fifth embodiment, so that the cooling effect on the arc can be increased. Therefore, the arc extinguishing performance can be further improved.

【0033】図14は本発明の第7実施例を示すもの
で、これも以下、第1実施例と相違する点のみを述べ
る。このものの場合、前述の駆動コイル51又は上述の
駆動コイル61同様に、上部71aを接点側に折曲した
駆動コイル71を用いており、これに対して、上方のグ
リッド板32を支持する上方の支持絶縁物72と、下方
のグリッド板23を支持する下方の支持絶縁物73に
は、それぞれ延長部72a,73aを形成して、これら
により駆動コイル71の上部71aまでを覆っている。
FIG. 14 shows a seventh embodiment of the present invention. Only the differences from the first embodiment will be described below. In this case, like the above-described drive coil 51 or the above-described drive coil 61, the drive coil 71 having the upper portion 71a bent to the contact side is used, whereas the drive coil 71 supporting the upper grid plate 32 is used. The support insulator 72 and the lower support insulator 73 that supports the lower grid plate 23 are formed with extensions 72a, 73a, respectively, which cover the upper part 71a of the drive coil 71.

【0034】これにより、やはり第5実施例又は第6実
施例同様の作用効果が得られる上に、駆動コイル71の
上部71aまでを覆うのに、第5実施例の絶縁物52の
ような別個の絶縁物を必要とせず、その分、使用部品点
数を削減できるものであり、組立ても容易ならしめ得る
という一層の効果が得られる。
As a result, the same function and effect as those of the fifth embodiment or the sixth embodiment can be obtained. In addition, the upper portion 71a of the drive coil 71 can be covered by a separate member such as the insulator 52 of the fifth embodiment. This does not require the insulator, so that the number of parts to be used can be reduced accordingly, and a further effect that the assembly can be easily performed can be obtained.

【0035】図15は本発明の第8実施例を示すもの
で、これも以下、第1実施例と相違する点のみを述べ
る。このものの場合、上部71aを接点側に折曲した駆
動コイル71に対して、上方のグリッド板32を支持す
る上方の支持絶縁物81と、下方のグリッド板23を支
持する下方の支持絶縁物82とを一体に形成し、これら
によって駆動コイル71の上部71aまでを覆ってい
る。
FIG. 15 shows an eighth embodiment of the present invention, and only the differences from the first embodiment will be described below. In this case, the upper support insulator 81 supporting the upper grid plate 32 and the lower support insulator 82 supporting the lower grid plate 23 are provided for the drive coil 71 having the upper portion 71a bent to the contact side. Are formed integrally, and these cover the upper part 71a of the drive coil 71.

【0036】これにより、第7実施例以上の使用部品点
数の削減、組立ての容易化を達成でき、加えて、両支持
絶縁物81,82間の組立ての誤りによる絶縁不良の問
題等の発生もなくすことができて、品質を向上させるこ
とができる。更に、この場合、支持絶縁物81,82間
には、第7実施例の支持絶縁物72,73の延長部72
a,73aのような重なり部分が生じないため、その
分、接点間に発生したアークの経路に、駆動コイル71
に流れる電流の経路を更に近付けることができ、その電
流による磁束がアークに一層密度高く作用するから、ア
ーク駆動力を更に増大させることができ、消弧性能を一
層向上させることができる。
As a result, the number of parts to be used can be reduced and the assembling can be facilitated as compared with the seventh embodiment. In addition, a problem such as insulation failure due to an erroneous assembly between the supporting insulators 81 and 82 can occur. It can be eliminated and the quality can be improved. Further, in this case, between the supporting insulators 81 and 82, the extension 72 of the supporting insulators 72 and 73 of the seventh embodiment is provided.
a and 73a, the drive coil 71 is not provided in the path of the arc generated between the contacts.
Can be made closer to each other, and the magnetic flux due to the current acts on the arc with a higher density, so that the arc driving force can be further increased and the arc extinguishing performance can be further improved.

【0037】図16及び図17は本発明の第9実施例を
示すもので、これも以下、第1実施例と相違する点のみ
を述べる。このものの場合、前述の固定接触子11に代
えて用いる固定接触子91において、固定接点部分であ
る固定接点板92を、駆動コイル93と別体で形成して
軸95により上下に回動可能に枢着すると共に、可撓性
ある導体96により、これら固定接点板92と駆動コイ
ル93とを接続している。又、この固定接点板92の固
定接点97側端部とケース内に設けたばね座98との間
には、弾性体である圧縮コイルスプリング99を介在さ
せて、固定接点板92を可動接点21側とは反対の下方
に移動可能に弾性支持している。
FIGS. 16 and 17 show a ninth embodiment of the present invention. Only the differences from the first embodiment will be described below. In this case, in a fixed contact 91 used in place of the fixed contact 11 described above, a fixed contact plate 92, which is a fixed contact portion, is formed separately from a drive coil 93 and is rotatable up and down by a shaft 95. The fixed contact plate 92 and the drive coil 93 are connected by a flexible conductor 96 while being pivotally connected. Further, a compression coil spring 99, which is an elastic body, is interposed between an end of the fixed contact plate 92 on the fixed contact 97 side and a spring seat 98 provided in the case to move the fixed contact plate 92 to the movable contact 21 side. It is elastically supported so as to be able to move downward in the opposite direction.

【0038】なお、圧縮コイルスプリング99は固定接
点板92を可動接点21側に付勢する力を有するもの
で、それに対し、消弧装置13内には、固定接点板92
の可動接点21側への移動を一定に規制するストッパ1
00を設けている。
The compression coil spring 99 has a force for urging the fixed contact plate 92 toward the movable contact 21, while the fixed contact plate 92 is provided in the arc extinguishing device 13.
Stopper 1 for restricting the movement of movable member 21 toward movable contact 21
00 is provided.

【0039】これにより、異常電流が流れて反発力によ
り可動接触子12が固定接触子91から開離するとき、
固定接点板92が圧縮コイルスプリング99を圧縮して
下方(反可動接点21側)に移動(回動)するため、第
1実施例のものより速く接点間が開放し、その開放距離
も大きくなる。よって、接点間に発生するアークの引延
ばしが速くなると共に引延ばし距離も大きくなり、これ
らによって、消弧性能を一層向上させることができる。
このほか、本発明は上記し且つ図面に示した実施例にの
み限定されるものではなく、要旨を逸脱しない範囲内で
適宜変更して実施し得る。
Thus, when an abnormal current flows and the movable contact 12 is separated from the fixed contact 91 by the repulsive force,
Since the fixed contact plate 92 compresses the compression coil spring 99 and moves (rotates) downward (toward the movable contact 21), the gap between the contacts is opened faster than in the first embodiment, and the opening distance is increased. . Therefore, the extension of the arc generated between the contacts is quickened and the extension distance is increased, whereby the arc extinguishing performance can be further improved.
In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

【0040】[0040]

【発明の効果】本発明は以上説明したとおりのもので、
下記の効果を奏する。請求項1の回路遮断器によれば、
遮断時に接点間に発生するアークを消弧装置の奥側に駆
動する駆動コイルを具えたものにおいて、そのアークに
作用する磁束の密度を充分に大きくし得て、アーク駆動
力を向上させ、併せてアークの冷却効果をも向上させ得
て、消弧性能を充分に向上させることができる。
The present invention is as described above.
The following effects are obtained. According to the circuit breaker of claim 1,
With a drive coil that drives the arc generated between the contacts at the time of interruption to the far side of the arc extinguishing device, the density of the magnetic flux acting on the arc can be sufficiently increased, and the arc driving force can be improved. As a result, the cooling effect of the arc can be improved, and the arc extinguishing performance can be sufficiently improved.

【0041】請求項2の回路遮断器によれば、駆動コイ
ルに流れる電流による磁界を固定接点周りに集中させて
発生させることができ、アークを発生初期でより有効に
駆動することができる。又、アークについての冷却効果
を増すこともでき、総じて、消弧性能を一層向上させる
ことができる。
According to the circuit breaker of the second aspect, the magnetic field due to the current flowing through the drive coil can be concentrated and generated around the fixed contact, and the arc can be driven more effectively in the initial stage of generation. In addition, the cooling effect of the arc can be increased, and the arc extinguishing performance can be further improved as a whole.

【0042】請求項3の回路遮断器によれば、接点間に
発生したアークによる磁束を消弧装置のグリッド板に効
率良く生じさせ得て、アーク駆動力を増すことができ、
消弧性能を一層向上させることができる。請求項4の回
路遮断器によれば、駆動コイルの上部近辺のグリッド板
を、駆動コイルの上部の角度にかかわりなく充分に大き
くすることができて、アークについての冷却効果を増す
ことができ、消弧性能を一層向上させることができる。
According to the circuit breaker of the third aspect, the magnetic flux due to the arc generated between the contacts can be efficiently generated on the grid plate of the arc extinguishing device, and the arc driving force can be increased.
Arc extinguishing performance can be further improved. According to the circuit breaker of claim 4, the grid plate near the upper part of the drive coil can be made sufficiently large irrespective of the angle of the upper part of the drive coil, and the cooling effect on the arc can be increased, Arc extinguishing performance can be further improved.

【0043】請求項5の回路遮断器によれば、接点間に
発生したアークの経路に、駆動コイルに流れる電流の経
路を近付けることができて、その電流による磁束をアー
クに密度高く作用させ得、アーク駆動力を増大させるこ
とができる。又、この場合、駆動コイルと可動接触子と
の間には吸引力が働き、この吸引力によって可動接触子
が固定接触子から素早く開離されるから、アークの延び
るのが速くなって、消弧性能を一層向上させることがで
きる。
According to the circuit breaker of the fifth aspect, the path of the current flowing through the drive coil can be made closer to the path of the arc generated between the contacts, and the magnetic flux due to the current can act on the arc with high density. , The arc driving force can be increased. In this case, an attractive force acts between the drive coil and the movable contact, and the movable contact is quickly separated from the fixed contact by the attractive force. The performance can be further improved.

【0044】請求項6の回路遮断器によれば、請求項5
の回路遮断器同様の作用効果が得られる上に、グリッド
板の挿入配置が容易となり、組立性を良くすることがで
きる。又、この場合、接点寄りの部分に挿入配置するグ
リッド板の枚数を多くできることにより、アークについ
ての冷却効果を増すことができて、消弧性能を一層向上
させることができる。
According to the circuit breaker of claim 6, claim 5 is provided.
In addition to obtaining the same operation and effect as the circuit breaker described above, the grid plate can be easily inserted and arranged, and the assemblability can be improved. Further, in this case, the number of grid plates inserted and arranged near the contact can be increased, so that the cooling effect of the arc can be increased and the arc extinguishing performance can be further improved.

【0045】請求項7の回路遮断器によれば、請求項5
又は請求項6の回路遮断器同様の作用効果が得られる上
に、使用部品点数の削減ができ、組立ても容易ならしめ
ることができる。
According to the circuit breaker of claim 7, claim 5 is provided.
Alternatively, the same function and effect as those of the circuit breaker according to claim 6 can be obtained, the number of parts used can be reduced, and assembly can be facilitated.

【0046】請求項8の回路遮断器によれば、請求項7
の回路遮断器以上の使用部品点数の削減、組立ての容易
化を達成でき、加えて、支持絶縁物間の組立ての誤りに
よる絶縁不良の問題等の発生もなくすことができて、品
質を向上させることができる。更に、この場合、接点間
に発生したアークの経路に、駆動コイルに流れる電流の
経路を更に近付けることができて、アーク駆動力を更に
増大させることができ、消弧性能を一層向上させること
ができる。
According to the circuit breaker of claim 8, claim 7 is provided.
It is possible to reduce the number of parts used more than the circuit breaker and to facilitate the assembly, and also to eliminate the problem of insulation failure due to an assembly error between the supporting insulators, thereby improving the quality. be able to. Further, in this case, the path of the current flowing through the drive coil can be made closer to the path of the arc generated between the contacts, so that the arc driving force can be further increased and the arc extinguishing performance can be further improved. it can.

【0047】請求項9の回路遮断器によれば、接点間に
発生するアークの引延ばしを速くできると共に、引延ば
し距離も大きくできて、消弧性能を一層向上させること
ができる。請求項10の回路遮断器によれば、グリッド
板の大きさを大きくすることができて、アークをグリッ
ド板で冷却する冷却効果を更に向上させ得、消弧性能を
一層向上させることができる。
According to the circuit breaker of the ninth aspect, the arc generated between the contacts can be extended quickly and the extension distance can be increased, so that the arc extinguishing performance can be further improved. According to the circuit breaker of the tenth aspect, the size of the grid plate can be increased, the cooling effect of cooling the arc by the grid plate can be further improved, and the arc extinguishing performance can be further improved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の第1実施例を示す主要部分の平面図FIG. 1 is a plan view of a main part showing a first embodiment of the present invention.

【図2】主要部分の側面図FIG. 2 is a side view of a main part.

【図3】主要部品の斜視図FIG. 3 is a perspective view of main parts.

【図4】作用説明のための主要部分の側面図FIG. 4 is a side view of a main part for explaining operation.

【図5】作用説明のための主要部分の縦断面図FIG. 5 is a longitudinal sectional view of a main part for describing an operation.

【図6】作用説明のための主要部分の横断面図(磁束分
布図)
FIG. 6 is a cross-sectional view (magnetic flux distribution diagram) of a main part for describing an operation.

【図7】効果説明のための図FIG. 7 is a diagram for explaining effects.

【図8】本発明の第2実施例を示す主要部分の破断斜視
FIG. 8 is a cutaway perspective view of a main part showing a second embodiment of the present invention.

【図9】本発明の第3実施例を示す図2相当図FIG. 9 is a view corresponding to FIG. 2, showing a third embodiment of the present invention.

【図10】本発明の第4実施例を示す図2相当図FIG. 10 is a view corresponding to FIG. 2, showing a fourth embodiment of the present invention;

【図11】本発明の第5実施例を示す図3相当図FIG. 11 is a view corresponding to FIG. 3, showing a fifth embodiment of the present invention.

【図12】主要部分の正面図FIG. 12 is a front view of a main part.

【図13】本発明の第6実施例を示す図3相当図FIG. 13 is a view corresponding to FIG. 3, showing a sixth embodiment of the present invention.

【図14】本発明の第7実施例を示す図12相当図FIG. 14 is a view corresponding to FIG. 12, showing a seventh embodiment of the present invention.

【図15】本発明の第8実施例を示す図12相当図FIG. 15 is a view corresponding to FIG. 12, showing an eighth embodiment of the present invention.

【図16】本発明の第9実施例を示す図12相当図FIG. 16 is a view corresponding to FIG. 12, showing a ninth embodiment of the present invention;

【図17】図2相当図FIG. 17 is a diagram corresponding to FIG. 2;

【図18】従来例を示す図2相当図FIG. 18 is a diagram corresponding to FIG. 2 showing a conventional example.

【図19】図6相当図FIG. 19 is a diagram corresponding to FIG. 6;

【符号の説明】[Explanation of symbols]

11は固定接触子、12は可動接触子、13は消弧装
置、14は電源側端子部、15は固定接点板、16は駆
動コイル、19は固定接点、Tは駆動コイルの厚さ、W
1 は駆動コイルの幅、21は可動接点、22は支持絶縁
物、23はグリッド板、23aはグリッド板の負荷側端
子方向に延びた部分、31は駆動コイル、32はグリッ
ド板、33は支持絶縁物、41は駆動コイル、41aは
駆動コイルの上部、51は駆動コイル、51aは駆動コ
イルの上部、52,53は支持絶縁物、61は駆動コイ
ル、61aは駆動コイルの上部、71は駆動コイル、7
1aは駆動コイルの上部、72,73は支持絶縁物、7
2a,73aは支持絶縁物の延長部、81,82は支持
絶縁物、91は固定接触子、92は固定接点板(固定接
点部分)、93は駆動コイル、95は軸、96は導体、
97は固定接点、99は圧縮コイルスプリング(弾性
体)を示す。
11 is a fixed contact, 12 is a movable contact, 13 is an arc extinguishing device, 14 is a power supply side terminal unit, 15 is a fixed contact plate, 16 is a driving coil, 19 is a fixed contact, T is a thickness of a driving coil, W
1 is the width of the drive coil, 21 is a movable contact, 22 is a supporting insulator, 23 is a grid plate, 23a is a portion of the grid plate extending in the direction of the load side terminal, 31 is a drive coil, 32 is a grid plate, and 33 is a support. Insulator, 41 is a drive coil, 41a is an upper part of the drive coil, 51 is a drive coil, 51a is an upper part of the drive coil, 52 and 53 are supporting insulators, 61 is a drive coil, 61a is an upper part of the drive coil, 71 is a drive. Coil, 7
1a is the upper part of the drive coil, 72 and 73 are supporting insulators, 7
2a and 73a are extensions of the supporting insulator, 81 and 82 are supporting insulators, 91 is a fixed contact, 92 is a fixed contact plate (fixed contact portion), 93 is a driving coil, 95 is a shaft, 96 is a conductor,
Reference numeral 97 denotes a fixed contact, and 99 denotes a compression coil spring (elastic body).

───────────────────────────────────────────────────── フロントページの続き (72)発明者 染川 幸範 三重県三重郡朝日町大字繩生2121番地 株 式会社東芝三重工場内 (72)発明者 桑村 和男 三重県三重郡朝日町大字繩生2121番地 株 式会社東芝三重工場内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor, Yukinori Somegawa 2121, Nagoya, Asahimachi, Mie-gun, Mie Prefecture Inside the Mie Plant of Toshiba Corporation (72) Kazuo Kuwamura, 2121, Nagoya, Asahimachi, Mie-gun, Mie Prefecture Inside Mie Plant of Toshiba Corporation

Claims (10)

【特許請求の範囲】[Claims] 【請求項1】 先端側に固定接点を有し、基端側に電源
側端子部を有する固定接触子と、 先端側に前記固定接点に接離される可動接点を有し、基
端側が負荷側端子に接続される可動接触子と、 前記電源側端子部と負荷側端子との間に異常電流が流れ
たときに、前記可動接触子を開離方向に移動させて接点
を開放するトリップ装置と、 前記固定接触子の両側を挟むように設けられた両支持絶
縁物間に、複数枚のグリッド板を前記可動接点の移動方
向に多段に配置して成る消弧装置と、 前記可動接触子の先端部に対応して前記両支持絶縁物の
外側に設けられ、前記両接点間に発生するアークを前記
消弧装置の奥側に駆動する駆動コイルとを具備し、 前記消弧装置のグリッド板のうち、少なくとも前記両接
点間に発生するアークと対応する位置のグリッド板のそ
れぞれ負荷側端子方向に延びた部分の先端部を、前記接
点の両側位置に、又はそれよりも負荷側端子方向の位置
に配置したことを特徴とする回路遮断器。
1. A fixed contact having a fixed contact on a distal end side and a power-supply-side terminal on a base end side, and a movable contact on the distal end side which is brought into contact with and separated from the fixed contact. A movable contact connected to a terminal, and a trip device that opens the contact by moving the movable contact in a separating direction when an abnormal current flows between the power supply side terminal and the load side terminal. An arc extinguishing device comprising a plurality of grid plates arranged in multiple stages in a moving direction of the movable contact between two supporting insulators provided so as to sandwich both sides of the fixed contact; A drive coil provided outside the support insulator corresponding to the distal end and driving an arc generated between the two contacts to the back side of the arc extinguishing device; and a grid plate of the arc extinguishing device. Of at least the position corresponding to the arc generated between the two contacts The leading end of each portion extending to the load terminal direction of the lid plate, the positions on both sides of the contact, or circuit breaker, characterized in that arranged at the position of the load terminal direction than that.
【請求項2】 駆動コイルの高さを可動接触子の全開離
時の位置より低く設定し、それより上方のグリッド板の
幅を下方のグリッド板の幅より大きくしたことを特徴と
する請求項1記載の回路遮断器。
2. The method according to claim 1, wherein the height of the drive coil is set lower than the position of the movable contact at the time of full separation, and the width of the grid plate above the movable contact is larger than the width of the lower grid plate. 2. The circuit breaker according to 1.
【請求項3】 少なくとも前記両接点間に発生するアー
クと対応する位置のグリッド板を可動接点の移動軌跡と
ほゞ直角に配置したことを特徴とする請求項1記載の回
路遮断器。
3. The circuit breaker according to claim 1, wherein a grid plate at a position corresponding to at least an arc generated between the two contacts is arranged substantially at right angles to a movement locus of the movable contact.
【請求項4】 駆動コイルの上部とその近辺のグリッド
板とをほゞ平行に設けたことを特徴とする請求項1記載
の回路遮断器。
4. The circuit breaker according to claim 1, wherein an upper portion of the drive coil and a grid plate near the upper portion are substantially parallel to each other.
【請求項5】 駆動コイルの上部を接点側に折曲したこ
とを特徴とする請求項1記載の回路遮断器。
5. The circuit breaker according to claim 1, wherein an upper portion of the drive coil is bent toward a contact.
【請求項6】 駆動コイルの上部を接点側に下部とほゞ
平行に折曲したことを特徴とする請求項1記載の回路遮
断器。
6. The circuit breaker according to claim 1, wherein the upper portion of the drive coil is bent substantially parallel to the lower portion on the contact side.
【請求項7】 上部を接点側に折曲した駆動コイルを、
消弧装置の上部支持絶縁物と下部支持絶縁物とで覆った
ことを特徴とする請求項5又は6記載の回路遮断器。
7. A drive coil having an upper portion bent to the contact side,
7. The circuit breaker according to claim 5, wherein the arc extinguishing device is covered with an upper supporting insulator and a lower supporting insulator.
【請求項8】 消弧装置の上部支持絶縁物と下部支持絶
縁物とを一体に形成したことを特徴とする請求項7記載
の回路遮断器。
8. The circuit breaker according to claim 7, wherein an upper supporting insulator and a lower supporting insulator of the arc extinguishing device are formed integrally.
【請求項9】 固定接触子の固定接点部分を反可動接点
側に移動可能に弾性支持したことを特徴とする請求項1
記載の回路遮断器。
9. The fixed contact part of the fixed contact is elastically supported so as to be movable toward the non-movable contact side.
The described circuit breaker.
【請求項10】 駆動コイルの幅を厚さより大きくした
ことを特徴とする請求項1記載の回路遮断器。
10. The circuit breaker according to claim 1, wherein the width of the drive coil is larger than the thickness.
JP17199397A 1997-06-27 1997-06-27 Circuit breaker Pending JPH1125836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17199397A JPH1125836A (en) 1997-06-27 1997-06-27 Circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17199397A JPH1125836A (en) 1997-06-27 1997-06-27 Circuit breaker

Publications (1)

Publication Number Publication Date
JPH1125836A true JPH1125836A (en) 1999-01-29

Family

ID=15933546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17199397A Pending JPH1125836A (en) 1997-06-27 1997-06-27 Circuit breaker

Country Status (1)

Country Link
JP (1) JPH1125836A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008112692A (en) * 2006-10-31 2008-05-15 Fuji Electric Systems Co Ltd Overcurrent protective device
JP2011070866A (en) * 2009-09-25 2011-04-07 Mitsubishi Electric Corp Circuit breaker
CN102456520A (en) * 2010-10-18 2012-05-16 三菱电机株式会社 Circuit breaker

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008112692A (en) * 2006-10-31 2008-05-15 Fuji Electric Systems Co Ltd Overcurrent protective device
JP2011070866A (en) * 2009-09-25 2011-04-07 Mitsubishi Electric Corp Circuit breaker
CN102456520A (en) * 2010-10-18 2012-05-16 三菱电机株式会社 Circuit breaker
KR101232453B1 (en) 2010-10-18 2013-02-12 미쓰비시덴키 가부시키가이샤 Circuit breaker

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