JPS63264841A - Circuit breaker - Google Patents

Circuit breaker

Info

Publication number
JPS63264841A
JPS63264841A JP9902787A JP9902787A JPS63264841A JP S63264841 A JPS63264841 A JP S63264841A JP 9902787 A JP9902787 A JP 9902787A JP 9902787 A JP9902787 A JP 9902787A JP S63264841 A JPS63264841 A JP S63264841A
Authority
JP
Japan
Prior art keywords
arc
circuit breaker
stator
insulating film
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.)
Pending
Application number
JP9902787A
Other languages
Japanese (ja)
Inventor
Fumiyuki Kujo
久常 文之
Hiroshi Fujii
洋 藤井
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP9902787A priority Critical patent/JPS63264841A/en
Priority to KR1019880003295A priority patent/KR910001537B1/en
Priority to ZA882723A priority patent/ZA882723B/en
Priority to DE3888007T priority patent/DE3888007T2/en
Priority to EP88106330A priority patent/EP0288040B1/en
Publication of JPS63264841A publication Critical patent/JPS63264841A/en
Pending legal-status Critical Current

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

PURPOSE:To quickly run an arc without sticking it and improve the break performance by covering the arc introducing end sections of arc extinguishing plates with an insulating film. CONSTITUTION:A stator 3, a fixed contact point 4 provided on the stator 3, a mover 1 driven by a disconnecting device, a movable contact point 2 provided on the mover 1 and disconnected from the fixed contact point 4 by the mover 1, an arc introducing member 5 fixed to the stator 3 at one end, and arc extinguishing plates 30 are provided, and an insulating film is formed on the arc introducing end sections of the arc extinguishing plates 30 made of a magnetic material. This insulating film is provided to the back section of the arc extinguishing plates 30 as they approach the arc introducing member 5. Since the arc is moved from (a) to (f) as the mover 1 is moved, the insulating film is preferably provided wider on the arc extinguishing plates 30 nearer to the arc runner 5. The sticking of the arc is thereby prevented, and a circuit breaker with the high break performance is obtained.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は電路をしゃ断する回路しゃ断器、特にそのア
ーク消弧のための構造の改良に閃するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is directed to improving a circuit breaker for breaking an electric circuit, particularly its structure for extinguishing arcs.

[従来の技術] 第4図に従来の回路しゃ断器における接点・消弧板付近
の構造を示す、固定子3には、ロウ付けによって固定接
点4およびアークランナ5が固定されている。ボルト1
2は、固定子3を絶縁材料からなるベース6に螺着する
とともに、固定子3の折り返された先端部31を固定し
ている。可動子1には可動接点2が設けられており、閉
路状態においては可動接点2と固定接点4は接触した状
態にある。
[Prior Art] Fig. 4 shows the structure of a conventional circuit breaker near the contacts and arc extinguishing plate.A fixed contact 4 and an arc runner 5 are fixed to a stator 3 by brazing. bolt 1
2 screws the stator 3 onto a base 6 made of an insulating material, and fixes the folded end portion 31 of the stator 3. The movable element 1 is provided with a movable contact 2, and in a closed circuit state, the movable contact 2 and the fixed contact 4 are in contact with each other.

この閉路状態において、電路に過電流が流れると、引き
外し装置(図示せず)が作動し可動子1を同前させる。
In this closed circuit state, when an overcurrent flows through the electrical circuit, a tripping device (not shown) is activated to move the movable element 1 forward.

この時、可動接点″2と固定接点4との間にはアーク9
が生じる。このアーク9は電磁力によってアークランナ
5の上を矢印Aの方向に移動させられる。この状態を平
面図として示したのが第5図である。磁性材料よりなる
消弧板10にはアーク導入のための切欠き10aが設け
られている。このためアーク9は磁力線のがたよりによ
って矢印Aの方向へ移動させられる。移動したアークは
、消弧板10によって、引きのばされ、分断され、消弧
される。
At this time, there is an arc 9 between the movable contact ``2'' and the fixed contact 4.
occurs. This arc 9 is moved in the direction of arrow A above the arc runner 5 by electromagnetic force. FIG. 5 shows this state as a plan view. The arc-extinguishing plate 10 made of a magnetic material is provided with a notch 10a for introducing an arc. Therefore, the arc 9 is moved in the direction of arrow A due to the wobbling of the magnetic lines of force. The moved arc is stretched out, divided, and extinguished by the arc extinguishing plate 10.

[発明が解決しようとする問題点] ところが、従来の回路しゃ断器には、次のような問題点
があった。
[Problems to be Solved by the Invention] However, the conventional circuit breaker has the following problems.

アークの移動がスムースに行なわれず、消弧板10の切
欠きlOaの側端部に移動した場合(第5図のアーク9
a参照)には、消弧板10からの熱電子放出によりアー
クがこう着することがあった。このため、アークがすみ
やかに走行せず、消弧が遅れ、しゃ断性能が劣下すると
いう問題点があった。
If the arc does not move smoothly and moves to the side edge of the notch lOa of the arc extinguishing plate 10 (arc 9 in FIG.
(see a), the arc sometimes stuck due to thermionic emission from the arc-extinguishing plate 10. For this reason, there was a problem that the arc did not travel quickly, the extinction of the arc was delayed, and the breaking performance was degraded.

この発明は、上記の問題点を解決して、しゃ断性能の高
い回路しゃ断器を提供することを目的とする。
An object of the present invention is to solve the above problems and provide a circuit breaker with high breaking performance.

[問題点を解決するための手段] この発明に係る回路しゃ断器は、固定子、固定子上に設
けられた固定接点、引き外し装置によって駆動させられ
る可動子、可動子上に設けられており可動子によって固
定接点と離接する可動接点、一端が固定子に固定された
アーク誘導部材および消弧板を備えており、磁性材料よ
りなる消弧板のアーク導入端部に絶縁皮膜を形成してい
る。この絶縁皮膜は、アーク誘導部材に近接した消弧板
はど後部にまで設けられている。
[Means for Solving the Problems] The circuit breaker according to the present invention includes a stator, a fixed contact provided on the stator, a movable element driven by a tripping device, and a movable element provided on the movable element. It is equipped with a movable contact that comes into contact with and separates from a fixed contact by a movable element, an arc induction member whose one end is fixed to the stator, and an arc extinguishing plate, and an insulating film is formed on the arc introduction end of the arc extinguishing plate made of a magnetic material. There is. This insulating film is provided up to the rear of the arc extinguishing plate near the arc guiding member.

[作用] 消弧板のアーク導入端部に設けられた絶縁皮膜は、熱電
子の放出を抑え、アークのこう着を防止する。
[Function] The insulating film provided at the arc introduction end of the arc extinguishing plate suppresses the emission of thermoelectrons and prevents the arc from sticking.

[実施例] この発明の一実施例を第1図に示す、固定子3の先端部
31は折り返して形成され、折り返し外面3aにはロウ
付けによって固定接点4およびアーク誘導部材であるア
ークランナ5が固定されている。
[Embodiment] An embodiment of the present invention is shown in FIG. 1. The tip portion 31 of the stator 3 is formed by folding back, and a fixed contact 4 and an arc runner 5 which is an arc guiding member are attached to the folded outer surface 3a by brazing. Fixed.

第1図、第2図に示されるように、消弧板30の側部に
は突出部50が設けられており、消弧側板11に設けら
れた穴から突出させられ、かしめられて固定されている
。消弧板30は磁性体によってtrt成されており、そ
の一部には絶縁皮膜32が設けられている。この絶縁皮
膜32としては、水溶アルミナよりなるシトラックエポ
キシ静電粉体、液体セラミックのような耐電弧塗料など
が好ましい。この実施例ではこの耐f4孤塗料の中に消
弧板30、消弧側板11を漬けて形成している。絶縁度
[32はアーク導入のための切欠き30aの両側、すな
わちアーク導入端部30bを覆うように設けられている
。なお、かしめた突出部50も覆うように絶縁皮膜32
を設けておけば、かしめ部分がさびるおそれがない、ま
た回路しゃ断器振動時には、消弧側板11の端面から粉
が生じ、接点間に混入して不良の原因となることがあっ
た。絶縁皮膜32によって、この粉の発生をおさえるこ
とができる。
As shown in FIGS. 1 and 2, a protrusion 50 is provided on the side of the arc extinguishing plate 30, and is protruded from a hole provided in the arc extinguishing side plate 11 and fixed by caulking. ing. The arc-extinguishing plate 30 is made of a magnetic material, and an insulating film 32 is provided on a portion thereof. The insulating film 32 is preferably made of Citruc epoxy electrostatic powder made of water-soluble alumina, arc-resistant paint such as liquid ceramic, or the like. In this embodiment, the arc-extinguishing plate 30 and the arc-extinguishing side plate 11 are formed by immersing them in this F4 arc-resistant paint. The insulation degree [32] is provided so as to cover both sides of the notch 30a for introducing the arc, that is, the arc introduction end 30b. Note that the insulating film 32 is applied so as to cover the caulked protrusion 50 as well.
By providing this, there is no risk that the caulked portion will rust, and when the circuit breaker vibrates, powder may be generated from the end face of the arc-extinguishing side plate 11 and mixed between the contacts, causing a failure. The insulating film 32 can suppress the generation of this powder.

第1図を参照しつつ、この実施例による回路しゃ断器の
動作を説明する。可動子1には可動接点2が設けられて
おり、閉路状態においては可動接点2と固定接点4は接
触した状態にある。この閉路状態において、電路に過電
流が流れると、引き外し装置(図示せず)が作動し可動
子1を開部させる。この時、可動接点2と固定接点4の
間にはアーク9が生じる。このアーク9は電磁力によっ
てアークランナ5の上を矢印Aの方向に移動させられる
。このときに、アークが底部消弧板30に触れても、ア
ーク導入端部30bが絶縁皮膜32で覆われているので
、熱電子を放出することがなくアークのこう着が起こら
ない、アークは、すみやかに消弧板30の奥深く伸長さ
れ、磁性金属部34に接触して、効率よく冷却される。
The operation of the circuit breaker according to this embodiment will be explained with reference to FIG. The movable element 1 is provided with a movable contact 2, and in a closed circuit state, the movable contact 2 and the fixed contact 4 are in contact with each other. In this closed circuit state, when an overcurrent flows through the electrical circuit, a tripping device (not shown) is activated to open the movable element 1. At this time, an arc 9 is generated between the movable contact 2 and the fixed contact 4. This arc 9 is moved in the direction of arrow A above the arc runner 5 by electromagnetic force. At this time, even if the arc touches the bottom arc-extinguishing plate 30, the arc introduction end 30b is covered with the insulating film 32, so thermionic electrons are not emitted and the arc does not stick. , it is immediately extended deep into the arc-extinguishing plate 30, contacts the magnetic metal part 34, and is efficiently cooled.

アークは金属に直接触れるほうが効率よく冷却されるの
で、絶縁皮膜32は消弧板30の後端部には設けないほ
うが好ましい、すなわち、絶縁皮膜32は、アークこう
着の生じやすい部分に集中して設けておくほうが効率が
よい。アークの時間的変化を表わしたのが第3図である
、可動子1がイの位置にある時はアークはaの位置に生
じる0口の位置にある時にはbの位置に、ハの位置にあ
る時にはCの位置に、二の位置にある時にはdの位置に
SI/Iする。さらに時1111の経過とともにアーク
はeからfへ移動する。この図からも明らかなように、
アークランナ5に近い消弧板30はど長時間アークにさ
らされ、こう菅が生じやすい、したがって、第1図に示
すように絶縁被膜32はアークランナ5に近い消弧板3
0はど広く設けておくほうが好ましい。
Since the arc is cooled more efficiently when it comes into direct contact with metal, it is preferable not to provide the insulating film 32 at the rear end of the arc-extinguishing plate 30. In other words, the insulating film 32 is concentrated in areas where arc sticking is likely to occur. It is more efficient to set it up. Figure 3 shows the temporal changes in the arc.When the mover 1 is in position A, the arc is in position a.When it is in the zero position, it is in position b, and in position C. When it is in position C, it is in position C, and when it is in position 2, it is in position d. Further, as time 1111 passes, the arc moves from e to f. As is clear from this figure,
The arc extinguishing plate 30 near the arc runner 5 is exposed to the arc for a long time and is likely to cause condensation. Therefore, as shown in FIG.
It is preferable to set 0 as wide as possible.

なお、他の実施例として、消弧板30を所定の位置まで
塗料に漬けた後、消弧側板11のみをその全面が浸され
るように塗料に漬けてもよい、このようにすれば、回路
しゃ断器振動時に発生する粉をより完全におさえること
ができる。
In addition, as another embodiment, after the arc extinguishing plate 30 is dipped in the paint to a predetermined position, only the arc extinguishing side plate 11 may be dipped in the paint so that its entire surface is immersed. Powder generated when the circuit breaker vibrates can be suppressed more completely.

[発明の効果] この発明に係る回路しゃ断器は、消弧板のアーク導入端
部を絶縁被膜によって覆っている。したがって、アーク
のこう着を生じることがなく、アークがすみやかに走行
し、しゃ断性能の向上を図ることかできる。また、アー
ク誘導部材に近い消弧板はど後部まで絶縁被膜が設けら
れている。したがって、効果的にアークのこう着をおさ
えることができる。すなわち、信頼性の高い回路しゃ断
器を提供することができる。
[Effects of the Invention] In the circuit breaker according to the present invention, the arc introducing end of the arc extinguishing plate is covered with an insulating coating. Therefore, no arc stagnation occurs, the arc runs quickly, and the breaking performance can be improved. Further, an insulating coating is provided up to the rear of the arc extinguishing plate near the arc guiding member. Therefore, arc stagnation can be effectively suppressed. That is, a highly reliable circuit breaker can be provided.

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

第1図はこの発明の一実施例としての回路しゃ断器の要
部を示す側面図、第2図は第1図の回路しゃ断器に用い
た消弧板の詳細を示す図、第3図はアークの時間的変化
を示す図、第4図は従来の回路しゃ断器の要部を示す側
面図、第5図は第4図の回路しゃ断器に用いられている
消弧板の詳細を示す図である。 1は可動子、2は可動接点、3は固定子、4は固定接点
、5はアークランナ、30は消弧板である。 なお、各図中同一符号は同−又は相当部分を示す。 、 代理人   大岩 増雄 第2図 30b 第5図
FIG. 1 is a side view showing the main parts of a circuit breaker as an embodiment of the present invention, FIG. 2 is a diagram showing details of the arc-extinguishing plate used in the circuit breaker of FIG. 1, and FIG. Figure 4 is a side view showing the main parts of a conventional circuit breaker; Figure 5 is a diagram showing details of the arc extinguishing plate used in the circuit breaker shown in Figure 4. It is. 1 is a movable element, 2 is a movable contact, 3 is a stator, 4 is a fixed contact, 5 is an arc runner, and 30 is an arc extinguishing plate. Note that the same reference numerals in each figure indicate the same or corresponding parts. , Agent Masuo Oiwa Figure 2 30b Figure 5

Claims (3)

【特許請求の範囲】[Claims] (1)固定子、 固定子上に設けられた固定接点、 引き外し装置によって駆動させられる可動子、可動子上
に設けられており、可動子によって固定接点と離接する
可動接点、 一端が固定子に固定されたアーク誘導部材、アーク誘導
部材の上部空間にアークに対してほぼ垂直な面を形成す
るよう設けられ、アーク誘導部材に近接したものほど後
部まで覆われるようにアーク導入端部に絶縁皮膜が形成
された磁性材料よりなる複数枚の消弧板、 を備えたことを特徴とする回路しゃ断器。
(1) A stator, a fixed contact provided on the stator, a movable element driven by a tripping device, a movable contact provided on the movable element and connected to and separated from the fixed contact by the movable element, one end of which is connected to the stator. The arc induction member is fixed to the arc induction member, and the arc induction member is provided in the space above the arc induction member so as to form a surface almost perpendicular to the arc. A circuit breaker comprising: a plurality of arc-extinguishing plates made of a magnetic material on which a film is formed.
(2)前記消弧板は、その側部に設けられた突出部を消
弧側板に挿入した後、かしめることによって固定された
ものであることを特徴とする特許請求の範囲第1項記載
の回路しゃ断器。
(2) The arc-extinguishing plate is fixed by caulking after inserting a protrusion provided on the side of the arc-extinguishing plate into the arc-extinguishing side plate. circuit breaker.
(3)前記絶縁皮膜は、前記消弧板ならびに前記消弧側
板を耐電弧絶縁塗料の中に漬けることによって形成した
ものであることを特徴する特許請求の範囲第2項記載の
回路しゃ断器。
(3) The circuit breaker according to claim 2, wherein the insulating film is formed by dipping the arc-extinguishing plate and the arc-extinguishing side plate in an arc-resistant insulating paint.
JP9902787A 1987-04-21 1987-04-21 Circuit breaker Pending JPS63264841A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP9902787A JPS63264841A (en) 1987-04-21 1987-04-21 Circuit breaker
KR1019880003295A KR910001537B1 (en) 1987-04-21 1988-03-26 Circuit breaker
ZA882723A ZA882723B (en) 1987-04-21 1988-04-19 Circuit breaker
DE3888007T DE3888007T2 (en) 1987-04-21 1988-04-20 Circuit breaker.
EP88106330A EP0288040B1 (en) 1987-04-21 1988-04-20 Circuit Breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9902787A JPS63264841A (en) 1987-04-21 1987-04-21 Circuit breaker

Publications (1)

Publication Number Publication Date
JPS63264841A true JPS63264841A (en) 1988-11-01

Family

ID=14235808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9902787A Pending JPS63264841A (en) 1987-04-21 1987-04-21 Circuit breaker

Country Status (2)

Country Link
JP (1) JPS63264841A (en)
ZA (1) ZA882723B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100910525B1 (en) 2007-09-03 2009-07-31 엘에스산전 주식회사 Arc extinguishing device of manual motor starter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100910525B1 (en) 2007-09-03 2009-07-31 엘에스산전 주식회사 Arc extinguishing device of manual motor starter

Also Published As

Publication number Publication date
ZA882723B (en) 1988-10-17

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