JPS60258823A - Device for extinguishing circuit breaker - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〔技術分野〕 本発明は、回路遮断器の固定接点と可動接点間に発生す
るアークをこれら両接点の近傍に多数枚積層して排気板
とともに配設された消弧グリッドにて分割消弧する回路
遮断器の消弧装置に関する。[Detailed Description of the Invention] [Technical Field] The present invention is directed to an arc extinguisher that eliminates the arc generated between a fixed contact and a movable contact of a circuit breaker by stacking a large number of sheets near these contacts and disposing the arc together with an exhaust plate. The present invention relates to an arc extinguishing device for a circuit breaker that extinguishes arcs in a grid.

〔背景技術〕[Background technology]

との種消弧装置は１回路遮断器に要求される消弧能力や
大きさ、すなわち消弧室の大きさ等に応じ、消弧グリッ
ドの枚数及び厚さが設計される。In the type of arc extinguishing device, the number and thickness of the arc extinguishing grids are designed according to the arc extinguishing ability and size required for a circuit breaker, that is, the size of the arc extinguishing chamber.

一般的に消弧グリッドの枚数を多くするとアーク電圧が
高く々って大電流遮断時の限流性能を向上させ得るが、
一方アークエネルギーによる消弧グリッドの消耗も多く
なる。特に電源電圧及び短絡時等の電流が大きい場合に
は、消弧グリッドの枚数を増して限流性能を向上させ得
る利点よりも消弧グリッドの消耗という欠点の方の影響
が大きく、従って遮断電流領域の・拡大には限界があっ
た。In general, increasing the number of arc-extinguishing grids increases the arc voltage and can improve current-limiting performance when interrupting large currents.
On the other hand, the arc extinguishing grid is also consumed more by the arc energy. In particular, when the power supply voltage and current during short circuits are large, the disadvantage of wearing out the arc extinguishing grid is greater than the advantage of increasing the number of arc extinguishing grids to improve current limiting performance, and therefore the breaking current There were limits to the expansion of territory.

〔発明の目的〕[Purpose of the invention]

本発明は上記事由に鑑みてなしたもので、その目的とす
るところは、遮電電流領域が拡大できる回路遮断器の消
弧装置を提供するにある。The present invention has been made in view of the above-mentioned reasons, and its object is to provide an arc extinguishing device for a circuit breaker that can expand the interruption current range.

〔発明の開示〕[Disclosure of the invention]

本発明は、消弧グリッドを、排気板の両側で枚数を異な
らせかつ接点１１１１に位置する枚数よりも接点と反対
側に位置する枚数を少々くすることによって、電源電圧
及び短絡時等の電流がそれ程・大きく危い場合は接点側
に位置する枚数の多い部分で、電源電圧及び短絡時等の
電流が大きい場合は接点と反対側に位置する枚数の少な
い部分でそれぞれアークを分割消弧し、よって遮断電流
領域を拡大せしめるものである。In the present invention, the number of arc extinguishing grids is different on both sides of the exhaust plate, and the number of arc extinguishing grids is made slightly smaller on the opposite side of the contact than the number of arc extinguishing grids on the opposite side of the contact. If the arc is large and dangerous, extinguish the arc in parts with a large number of plates located on the contact side, and if the power supply voltage and current during short circuits are large, use a part with a small number of plates located on the opposite side of the contacts to extinguish the arc separately. Therefore, the cut-off current range is expanded.

（実施例） 以下本発明の第１実施例を、第１図乃至第３図に基すい
て説明する。(Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

１は固定接点２を設けた固定接触子、３は固定接点２と
接離する可動接点４を設けた可動接触子で、通常は周知
の引外し装置（図示せず）の均整状態下にあって閉極状
態を保ち、短絡電流等の大電流が流れた際にはその均整
状態が崩れて開極する。1 is a fixed contact provided with a fixed contact 2, and 3 is a movable contact provided with a movable contact 4 that comes into contact with and separates from the fixed contact 2, and is normally under the balanced condition of a well-known tripping device (not shown). When a large current such as a short-circuit current flows, the balanced state is disrupted and the pole is opened.

５は両接点２．４の近傍に多数枚積層して排気板６とと
もに配設された消弧グリッドで、固定接触子ｌに連なる
下部アーク走行板７と可動接触子３に近接した位置から
延伸する上部アーク走行板ｌ　８とで挾まれている。こ
の消弧グリッド５は、排」・ 気孔６ａを設けた排気板６０両側でその枚数を異ならせ
かつ接点２．４側に位置する第１のグリッ（３） ド群５１よりも接点２．４と反対側に位置する第２のグ
リッド群犯の枚数を少なくしである。具体的には第１の
グリッド群５１は接点２．４側の端部にＵ字状溝を有す
る５枚の消弧グリッド５ａ　、　５ｂ　。Reference numeral 5 denotes an arc extinguishing grid which is laminated in large numbers and arranged together with the exhaust plate 6 near both contacts 2.4, and extends from a position close to the lower arc traveling plate 7 connected to the fixed contact 1 and the movable contact 3. It is sandwiched between the upper arc running plate l8. This arc-extinguishing grid 5 has different numbers of plates on both sides of the exhaust plate 60 provided with the exhaust holes 6a, and is located closer to the contact point 2.4 than the first grid (3) located on the contact point 2.4 side. The number of sheets for the second grid group located on the opposite side is reduced. Specifically, the first grid group 51 includes five arc-extinguishing grids 5a and 5b having a U-shaped groove at the end on the contact point 2.4 side.

・・・５ｅが相互に所定間隔を有しグリッド支持板９に
て支持され、第２のグリッド群５２は長方形の２枚の消
弧グリッド５ｆ　、　５ｇが前記した所定間隔より広く
なってグリッド支持板１０にて支持される。... 5e are supported by the grid support plate 9 with a predetermined spacing between them, and the second grid group 52 has two rectangular arc-extinguishing grids 5f and 5g that are wider than the predetermined spacing and are supported by the grid support plate 9. It is supported by a plate 10.

しかして、排気板６に対し接点２．４側に第１のグリッ
ド群５１を接点２．４と反対側に第２のグリッド群団を
配設して消弧装置を構成するのである。Thus, the arc extinguishing device is constructed by arranging the first grid group 51 on the side of the contact point 2.4 with respect to the exhaust plate 6 and the second grid group on the side opposite to the contact point 2.4.

かかる消弧装置にあっては、電源電圧及び短絡時等の電
流がそれ程大きく々い場合に両接点２゜４間に発生する
アークは、アークエネルギーもそれ程大きく々いので第
１のグリッド群５１にて分割消弧され、電源電圧及び短
絡時等の電流が大きい場合に両接点２．４間に発生する
アークは、アークエネルギーも大きいので排気板６の排
気孔６ａを突き抜は第２のグリッド群団にて分割消弧さ
れる。従って、アークエネルギーの大きさに応じて（４
） 両グリッド群５１　、５２がアークを分担することとな
り、消弧グリッド５の消耗を低減するとともに遮断電流
領域の拡大に対応できる。In such an arc extinguishing device, when the power supply voltage and the current at the time of a short circuit are large, the arc generated between both contacts 2.4 has a large arc energy, so the first grid group 51 The arc generated between both contacts 2 and 4 when the power supply voltage and current at the time of a short circuit are large has a large arc energy, so it is not possible to pierce through the exhaust hole 6a of the exhaust plate 6. It is divided and extinguished in grid groups. Therefore, depending on the magnitude of the arc energy (4
) Both grid groups 51 and 52 share the arc, reducing consumption of the arc-extinguishing grid 5 and making it possible to expand the interrupting current range.

なお、第２のグリッド群の消弧グリッド５ｆ　。Note that the arc-extinguishing grid 5f of the second grid group.

５ｇの厚さを厚くすればより好ましい対応ができる。A more preferable response can be achieved by increasing the thickness by 5 g.

第４図及び第５図は、本発明の第２実施例を示す。すな
わち、３枚の長さの短い消弧グリッド５ａ、　５ｃ　、
　５ｅと２枚の長さの長い消弧グリッド５ｈ。4 and 5 show a second embodiment of the invention. That is, three short arc extinguishing grids 5a, 5c,
5e and two long arc extinguishing grids 5h.

５１とを用意し、これらを相互に所定間隔を有　しかつ
接点２．４側ではすべてが交互に重合するようグリッド
支持板９にて支持し、さらに長い消弧グリッド５ｈ　、
　５ｉの接点２，４と反対側から排気板６を挿通しこれ
を短い消弧グリッド５ａ　、　５ｃ　。A long arc extinguishing grid 5h, which is supported by a grid support plate 9 so as to have a predetermined distance from each other and to alternately overlap each other on the contact point 2.4 side.
Insert the exhaust plate 6 from the side opposite to the contacts 2 and 4 of 5i and connect it to the short arc extinguishing grids 5a and 5c.

５ｅの端部で支持して消弧装置を構成する。An arc extinguishing device is constructed by supporting the end portion of 5e.

この第２実施例にあっては、前記した第１実施例と同様
の効果を奏するうえに、電源電圧及び短絡時等の電流が
それ程大きくない場合の消弧動作時、消弧グリッド５の
放熱作用を良好にし、また消弧装置が一体化できて組立
性も向上する。This second embodiment has the same effect as the first embodiment described above, and also improves the heat dissipation of the arc extinguishing grid 5 during arc extinguishing operation when the power supply voltage and current are not so large, such as during a short circuit. The function is improved, and the arc extinguishing device can be integrated, which improves ease of assembly.

（５） 第６図及び第７図は、本発明の第３実施例を示す。す々
わち、第１実施例の消弧グリッド５ａ　。(5) FIGS. 6 and 7 show a third embodiment of the present invention. That is, the arc extinguishing grid 5a of the first embodiment.

５ｂ　、・・・５ｅよりは長さの長い５枚の消弧グリッ
ドｆｌｊ　、　５ｊ’を用意し、これらを相互に所定間
隔を有しかつ上方から偶数枚目の消弧グリッド５ｊ′、
５ｊ′を接点２．４と反対側にずらせてグリッド支持板
９にて支持し、さらにずらせた消弧グリッド５１′。Five arc-extinguishing grids flj, 5j' having longer lengths than those of 5b, .
5j' is shifted to the side opposite to the contact point 2.4 and supported by the grid support plate 9, and the arc extinguishing grid 51' is further shifted.

５１′の接点２．４と反対側から排気板６を挿通しこれ
をすらさ力い消弧グリッド５ｊの端部で支持して消弧装
置を構成する。An arc extinguishing device is constructed by inserting the exhaust plate 6 from the side opposite to the contact point 2.4 of 51' and supporting it by the end of the arc extinguishing grid 5j.

この第３実施例にあっては、前記した第１実施例と同様
の効果を奏するうえに、消弧グリッドを一種類しか必要
としないので安価になる。This third embodiment provides the same effects as the first embodiment described above, and is also inexpensive because only one type of arc-extinguishing grid is required.

〔発明の効果〕〔Effect of the invention〕

本発明の回路遮断器の消弧装置は上記した如く、消弧装
置の消弧グリッドを、排気板の両側で枚数を異ならせか
つ接′点側に位置する枚数よりも接点と反対側に位置す
る枚数を少々くしたから、排気板の両側の部分が遮断時
に発生するアークエネルギーに応じてアークを分割消弧
でき、よって遮断電流領域が拡大できるものである。As described above, in the arc extinguishing device of a circuit breaker of the present invention, the number of arc extinguishing grids of the arc extinguishing device is different on both sides of the exhaust plate, and the number of the arc extinguishing grids is located on the opposite side of the contact point than the number of the arc extinguishing grids on both sides of the exhaust plate. Since the number of plates is slightly reduced, the arc can be extinguished in sections according to the arc energy generated at the time of interruption on both sides of the exhaust plate, and the interruption current range can therefore be expanded.

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

第１図乃至第３図は本発明の第１実施例を示し、第１図
は側面図、第２図は第１のグリッド群の斜視図、第３図
は第２のグリッド群の斜視図、第４図及び第５図は本発
明の第２実施例を示し、第４図は側面図、第５図は要部
斜視図、第６図及び第７図は本発明の第３実施例を示し
、第６図は側面図、第７図は要部斜視図である。 ２・・・固定接点、４・・・可動接点、５・・・消弧グ
リッド、６・・・排気板、７・・・下部アーク走行板、
８・・・上Ｂ１１アーク走行板、９．１０・・・グリッ
ド支持板。 特許出願人 松下電工株式会社 代理人弁理士　竹　元　敏　丸 、　（ほか２名） １゜ 坤 （７） 第１図 第２図　第３図 第４図1 to 3 show a first embodiment of the present invention, FIG. 1 is a side view, FIG. 2 is a perspective view of the first grid group, and FIG. 3 is a perspective view of the second grid group. , FIGS. 4 and 5 show a second embodiment of the present invention, FIG. 4 is a side view, FIG. 5 is a perspective view of main parts, and FIGS. 6 and 7 are a third embodiment of the present invention. FIG. 6 is a side view, and FIG. 7 is a perspective view of the main parts. 2... Fixed contact, 4... Movable contact, 5... Arc extinguishing grid, 6... Exhaust plate, 7... Lower arc traveling plate,
8... Upper B11 arc traveling plate, 9.10... Grid support plate. Patent applicant Matsushita Electric Works Co., Ltd. Representative Patent Attorney Toshimaru Takemoto (and 2 others) 1゜kon (7) Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] ＋１１　固定接点と可動接、０間に発生するアークをこ
れら両接点の近傍に多数枚積層して排気板とともに配設
された消弧グリッドにて分割消弧する回路遮断器の消弧
装置であって、前記消弧グリッドを、前記排気板の両側
で枚数を異らせかつ接点側に位置する枚数よりも接点と
反対側に位置する枚数を少なくしたことを特徴とする回
路遮断器の消弧装置。+11 This is an arc-extinguishing device for a circuit breaker that extinguishes the arc generated between a fixed contact, a movable contact, and 0 by dividing it into arcs using an arc-extinguishing grid that is stacked near both of these contacts and placed together with an exhaust plate. The arc extinguishing grid of a circuit breaker is characterized in that the number of the arc extinguishing grids is different on both sides of the exhaust plate, and the number of the arc extinguishing grids is smaller on the side opposite to the contact than the number on the contact side. Device.