JP2574505B2 - Arc extinguishing device - Google Patents
Arc extinguishing deviceInfo
- Publication number
- JP2574505B2 JP2574505B2 JP2077644A JP7764490A JP2574505B2 JP 2574505 B2 JP2574505 B2 JP 2574505B2 JP 2077644 A JP2077644 A JP 2077644A JP 7764490 A JP7764490 A JP 7764490A JP 2574505 B2 JP2574505 B2 JP 2574505B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- movable contact
- traveling plate
- contact
- 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.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H89/00—Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
- H01H89/06—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
- H01H89/08—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair
- H01H89/10—Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair with each device controlling one of the two co-operating contacts
Landscapes
- Breakers (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、リモートコントロール式回路遮断器等に
適用される消弧装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc extinguishing device applied to a remote control circuit breaker or the like.
第４図に従来例を示す。すなわち、このリモートコン
トロール式回路遮断器の消弧装置は、第１の可動接点10
0を先端部に有し異常時にトリップ開極する第１の可動
接触子101と、この第１の可動接触子101のオン位置の前
記第１の可動接点100に接離する第２の可動接点102を先
端部に有する第２の可動接触子103と、前記第１の可動
接触子101のオフ位置側に先端が位置する第１のアーク
走行板104と、前記第２の可動接触子101の開離位置側の
前記第２の可動接触子103と略平行に位置する電路連結
部105を有し電路連結部105より斜板部106を介して前記
第１のアーク走行板104に平行に伸びるアーク走行部107
を有する第２のアーク走行板108と、前記第１のアーク
走行板104と第２のアーク走行板108との間に介在された
消弧グリッド109とを備えている。FIG. 4 shows a conventional example. That is, the arc-extinguishing device of the remote control type circuit breaker includes the first movable contact 10.
A first movable contact 101 which has 0 at its tip and opens when an abnormality occurs, and a second movable contact which comes into contact with and separates from the first movable contact 100 at the ON position of the first movable contact 101 A second movable contact 103 having a distal end 102; a first arc traveling plate 104 having a distal end located on the off position side of the first movable contact 101; It has an electric circuit connecting portion 105 located substantially in parallel with the second movable contact 103 on the separation position side, and extends from the electric circuit connecting portion 105 through the swash plate portion 106 in parallel with the first arc traveling plate 104. Arc running part 107
And a second arc traveling plate 108 having an arc-extinguishing grid 109 interposed between the first arc traveling plate 104 and the second arc traveling plate 108.
図において、110は第１の可動接触子101をハンドル11
1により開閉するとともに異常電流検出手段112に応動し
てトリップ開極する機構部、113は第２の可動接触子103
を開閉駆動する遠隔操作用の電磁石、114は電磁石113と
第２の可動接触子103とを連結するレバー、115,116は端
子である。In the figure, reference numeral 110 denotes a first movable contact
A mechanism portion that opens and closes by means of 1 and opens the trip in response to the abnormal current detection means 112.
, A lever for connecting the electromagnet 113 and the second movable contact 103, and 115 and 116 terminals.
主回路に短絡事故があると主回路に接続された端子11
5,116間に接続された異常電流検出手段112の短絡検出部
が動作して機構部110がスリップ動作し、これにより第
１の可動接触子101がトリップ開極し、このとき第１の
可動接点100と第２の可動接点102との間にアークが発生
することがある。Terminal 11 connected to the main circuit when there is a short circuit accident in the main circuit
The short-circuit detecting section of the abnormal current detecting means 112 connected between the terminals 5 and 116 operates to cause the mechanism section 110 to slip, whereby the first movable contact 101 is trip-opened, and at this time, the first movable contact 100 An arc may be generated between the second movable contact 102 and the second movable contact 102.
アークは第１のアーク走行板104と第２のアーク走行
板108との間を走行して消弧グリッド109に移動し、高い
アーク電力を発生するとともに短絡電流が限流され、遮
断される。このとき、アークを消弧グリッド109へ早く
移動させるとそれだけ短絡電流の限流は早く行われる。
つまり通過エネルギが少なくなり、遮断性能が向上す
る。The arc travels between the first arc traveling plate 104 and the second arc traveling plate 108 and moves to the arc-extinguishing grid 109, which generates high arc power, limits the short-circuit current, and is interrupted. At this time, the earlier the arc is moved to the arc-extinguishing grid 109, the earlier the short-circuit current is limited.
That is, the passing energy is reduced, and the blocking performance is improved.
ところが、この消弧装置は、第２の可動接触子103と
第２のアーク走行板108の電路連結部105との間のスペー
スが、第２の可動接触子103の開離位置となるため大き
く、そのためアーク発生時にアークガスが前記スペース
に流れ込んで消弧グリッド109への流れが弱くなる。し
たがってアークが第２のアーク走行板108に移動しにく
くなるとともに、第２のアーク走行板108に移っても消
弧グリッド109へ移動する力が小さく、そのためアーク
が消弧グリッド109に移動する時間が長くなるという欠
点があった。However, in this arc extinguishing device, since the space between the second movable contact 103 and the electric path connecting portion 105 of the second arc traveling plate 108 is located at the separated position of the second movable contact 103, it is large. Therefore, when an arc is generated, the arc gas flows into the space and the flow to the arc-extinguishing grid 109 is weakened. Therefore, it is difficult for the arc to move to the second arc traveling plate 108, and even when the arc moves to the second arc traveling plate 108, the force for moving to the arc extinguishing grid 109 is small. However, there is a drawback that the length of the image becomes longer.
また、第１の可動接触子101のオフ位置では先端部が
想像線のように第２のアーク走行板108の方向に向いて
いるため、第１のアーク走行板104にアークが移動しに
くく、そのため消弧グリッド109に移動する時間が長く
なる。Further, at the off position of the first movable contact 101, the tip is directed in the direction of the second arc traveling plate 108 as indicated by an imaginary line, so that it is difficult for the arc to move to the first arc traveling plate 104, Therefore, the time required to move to the arc-extinguishing grid 109 becomes longer.
したがって、この発明の目的は、より一層早くアーク
を消弧グリッドに移動させることができる消弧装置を提
供することである。Therefore, an object of the present invention is to provide an arc extinguishing device that can move an arc to an arc extinguishing grid more quickly.
〔課題を解決するための手段〕 この発明の消弧装置は、第１の可動接点を先端部に有
して異常時にトリップ開極する第１の可動接触子と、こ
の第１の可動接触子のオン位置の前記第１の可動接点に
接離する第２の可動接点を先端部に有する第２の可動接
触子と、前記第１の可動接触子のオフ位置側に先端が位
置する第１のアーク走行板と、前記第２の可動接触子の
開離位置側に前記第２の可動接触子と略平行に位置する
電路連結部を有し前記電路連結部より前記第２の可動接
触子の接触位置の前記先端部に接近する延出部を有し前
記延出部より前記第２の可動接触子の先方から遠ざかる
方向に延びるアークガス遮蔽部を有しさらに前記アーク
ガス遮蔽部から前記第１のアーク走行板に平行に延びる
アーク走行部を有する第２のアーク走行板と、前記第１
のアーク走行板と第２のアーク走行板との間に介在され
た消弧グリッドと、前記第１の可動接触子および前記第
２の可動接触子の両側に配置されて前記第１の可動接触
子の前記オン位置の近傍に形成された第１の切欠を有す
るとともに前記第２の可動接触子の前記開離位置側に形
成された第２の切欠を有するアークガス還流側板とを備
え、前記第１の可動接触子の前記先端部の前記オフ位置
で前記第１のアーク走行板に向くように折曲されている
ものである。[Means for Solving the Problems] An arc extinguishing device according to the present invention includes a first movable contact having a first movable contact at a tip portion and opening a trip when an abnormality occurs, and the first movable contact. A second movable contact having a second movable contact at a distal end thereof which comes into contact with and separates from the first movable contact at an on position of the first movable contact; and a first movable contact having a distal end located at an off position side of the first movable contact. An arc traveling plate, and an electric circuit connecting portion positioned substantially in parallel with the second movable contact on an opening position side of the second movable contact, and the second movable contact from the electric circuit connecting portion. And an arc gas shielding portion extending from the extension portion in a direction away from the tip of the second movable contact. The arc gas shielding portion further extends from the arc gas shielding portion to the first position. A second arc traveling plate having an arc traveling portion extending parallel to the arc traveling plate of , The first
Arc extinguishing grid interposed between the arc traveling plate and the second arc traveling plate, and the first movable contact disposed on both sides of the first movable contact and the second movable contact. An arc gas recirculation side plate having a first notch formed in the vicinity of the ON position of the contact and having a second notch formed on the separation position side of the second movable contact; The movable contact is bent so as to face the first arc traveling plate at the off position of the distal end.
この発明の構成によれば、異常時に第１の可動接触子
が開極し、第１の可動接点と第２の可動接点との間にア
ークが発生した場合、アークは第１の可動接触子および
第２の可動接触子から第１のアーク走行板および第２の
アーク走行板に移動し、消弧グリッドにより分割され
る。このとき、アークガスが第２の可動接触子と電路連
結部との間のスペースに広がるのを第２のアーク走行板
のアークガス遮蔽部により遮蔽され、すべて消弧グリッ
ドへ流れるため、アークが第２のアーク走行板へ容易に
移動でき、さらに消弧グリッドの方へアークガスの流れ
に押されて迅速に移動する。とくに第１の可動接触子の
オン位置の近傍の第１の切欠および第２の可動接触子の
開離位置側の第２の切欠を有するアークガス還流側板を
設けたため、第１の可動接点および第２の可動接点間に
発生したアークガスを第１の切欠からアークガス還流側
板の外側に出し、第２の切欠から第２の可動接点の後方
へ戻すことにより、さらにより早くアークを消弧グリッ
ドに導くことができ、このとき第２のアーク走行板のア
ークガス遮蔽部により、アークガスが第２の可動接点の
後方で拡散することがなくアークの推進を高める。また
第１の可動接触子の先端部はオフ位置で第１のアーク走
行板の方向に向いているため、第１のアーク走行板にア
ークが移動しやすい。その結果、従来例と比較して、よ
り一層早くアークを消弧グリッドに移動させることがで
き、アーク電圧を早く立ち上げ、限流を早くして通過エ
ネルギを少なくできるので遮断性能を向上することがで
きる。According to the configuration of the present invention, when the first movable contact is opened at the time of an abnormality and an arc is generated between the first movable contact and the second movable contact, the arc is applied to the first movable contact. And from the second movable contact to the first arc traveling plate and the second arc traveling plate, and are divided by the arc extinguishing grid. At this time, the arc gas is prevented from spreading to the space between the second movable contact and the electric circuit connection portion by the arc gas shielding portion of the second arc traveling plate, and all of the arc gas flows to the arc-extinguishing grid. Can easily move to the arc traveling plate, and quickly move toward the arc extinguishing grid by being pushed by the flow of arc gas. In particular, since the arc gas recirculation side plate having the first notch near the ON position of the first movable contact and the second notch near the separation position of the second movable contact is provided, the first movable contact and the second The arc gas generated between the two movable contacts is discharged from the first notch to the outside of the arc gas recirculation side plate, and is returned from the second notch to the rear of the second movable contact, thereby guiding the arc to the arc extinguishing grid even earlier. At this time, the arc gas shield of the second arc traveling plate enhances the propulsion of the arc without the arc gas diffusing behind the second movable contact. In addition, since the distal end of the first movable contact points toward the first arc traveling plate at the off position, the arc easily moves to the first arc traveling plate. As a result, the arc can be moved to the arc-extinguishing grid more quickly than in the conventional example, the arc voltage can be quickly increased, the current limit can be increased, and the passing energy can be reduced, thereby improving the breaking performance. Can be.
この発明の一実施例を第１図ないし第３図に基づいて
説明する。すなわち、この消弧装置は、第１の可動接触
子１と、第２の可動接触子２と、第１のアーク走行板３
と、第２のアーク走行板４と、消弧グリッド５とを有す
る。One embodiment of the present invention will be described with reference to FIGS. That is, the arc extinguishing device includes a first movable contact 1, a second movable contact 2, and a first arc traveling plate 3.
And a second arc traveling plate 4 and an arc-extinguishing grid 5.
第１の可動接触子１は第１の可動接点６を有し、異常
時にトリップ開極する。また第１の可動接触子１の先端
部41はオフ位置で第１のアーク走行板３に向くように折
曲されている。この第１の可動接触子１は中間部が器台
13の固定軸14に軸支され、後端に開極ばね15を取付けて
オフ方向に付勢するとともに機構部12に連結されてい
る。The first movable contact 1 has a first movable contact 6 and opens the trip when an abnormality occurs. Further, the distal end portion 41 of the first movable contact 1 is bent so as to face the first arc traveling plate 3 at the off position. The first movable contact 1 has an intermediate part
An open spring 15 is attached to the rear end of the fixed shaft 14 for urging in the OFF direction and connected to the mechanism 12.
機構部12は、第１の可動接触子１に連結軸17により一
端が連結された連結リンク16と、連結リンク16の他端に
設けられた可動軸30と、この可動軸30に一端が連結され
た反転リンク18と、反転リンク18の他端を連結したハン
ドル連結軸31を有して固定軸19に軸支されかつ復帰ばね
21により復帰付勢されたハンドル20と、固定軸19に軸支
され可動軸30を摺動自在に通すスリット22を有するラッ
チリンク23と、固定軸33に軸支されラッチリンク23の係
止部24に係止する引掛部25を有し復帰ばね34により復帰
付勢されたトリップリンク26とを有する。トリップリン
ク26に対向して過電流検出用バイメタル27および短絡電
流検出用電磁石28からなる異常電流検出手段が配設され
ている。The mechanism 12 includes a connecting link 16 having one end connected to the first movable contact 1 by a connecting shaft 17, a movable shaft 30 provided at the other end of the connecting link 16, and one end connected to the movable shaft 30. A reversing link 18 and a handle connecting shaft 31 connecting the other end of the reversing link 18 and supported by a fixed shaft 19 and a return spring.
A handle 20 returned and urged by 21, a latch link 23 pivotally supported by the fixed shaft 19 and having a slit 22 slidably passing through the movable shaft 30, and a locking portion of the latch link 23 pivotally supported by the fixed shaft 33. And a trip link 26 that has a hook 25 that is locked to the lock 24 and is urged to return by a return spring 34. Opposed to the trip link 26, an abnormal current detecting means including an overcurrent detecting bimetal 27 and a short-circuit current detecting electromagnet 28 is provided.
トリップリンク26の引掛部25にラッチリンク23の係止
部24がラッチされた状態で、ハンドル20を実線の状態か
ら時計方向に倒すと、可動軸30がスリット22を摺動し
て、上方に移動し反転リンク18のハンドル連結軸31が固
定軸19と可動軸30とを結ぶ線を超えるので、第１の可動
接触子１が開極ばね15によりオフ動作する。ハンドル20
を実線の状態に移動するときはこの反対の動作が行わ
れ、第１の可動接触子１はオンとなる。When the handle 20 is tilted clockwise from the solid line in a state where the latching portion 24 of the latch link 23 is latched by the hooking portion 25 of the trip link 26, the movable shaft 30 slides through the slit 22 and moves upward. The first movable contact 1 is turned off by the opening spring 15 because the handle connecting shaft 31 of the reverse link 18 moves and exceeds the line connecting the fixed shaft 19 and the movable shaft 30. Handle 20
Is moved to the state indicated by the solid line, the opposite operation is performed, and the first movable contact 1 is turned on.
第１の可動接点６と第２の可動接点７とが接触した状
態で異常電流検出手段の過電流検出用バイメタル27およ
び短絡電流検出用電磁石28のコイルに電路電流が流れ
る。このとき過電流が流れると、過電流検出用バイメタ
ル27がわん曲し、トリップリンク26を押して引掛部25が
ラッチリンク23の係止フィラメント24から離れ、ラッチ
リンク23のラッチを釈放する。ラッチリンク23が釈放さ
れると開極ばね38のばねの力によりラッチリンク23が連
結リンク16および可動軸30により引かれて回動し、第１
の可動接触子１がトリップ開極する。When the first movable contact 6 and the second movable contact 7 are in contact with each other, an electric circuit current flows through the coils of the overcurrent detecting bimetal 27 and the short-circuit current detecting electromagnet 28 of the abnormal current detecting means. At this time, when an overcurrent flows, the overcurrent detecting bimetal 27 bends and pushes the trip link 26 to separate the hooking portion 25 from the locking filament 24 of the latch link 23, thereby releasing the latch of the latch link 23. When the latch link 23 is released, the latch link 23 is pulled by the connecting link 16 and the movable shaft 30 and rotated by the force of the spring of the opening spring 38, and the first link is rotated.
Of the movable contact 1 is opened.
電路に短絡電流が流れたときは過電流検出用バイメタ
ル27よりいち早く短絡検出用電磁石28が動作してトリッ
プリンク26を引外し動作する。この場合、短絡検出用電
磁石28のプランジャの強制開極棒47で直接第１の可動接
触子１を引き引外し動作より一瞬早く第１の可動接触子
１を開極させている。When a short-circuit current flows in the electric circuit, the short-circuit detecting electromagnet 28 operates earlier than the overcurrent detecting bimetal 27, and the trip link 26 is tripped. In this case, the first movable contact 1 is directly opened by the forcible opening rod 47 of the plunger of the short-circuit detecting electromagnet 28, and the first movable contact 1 is opened momentarily earlier than the operation.
第２の可動接触子２は、第１の可動接触子１のオン位
置の第１の可動接点６に接離する第２の可動接点７を有
する。この第２の可動接触子２はＬ字形のレバー35の一
片に中間部が枢支され、後端部に接点圧ばね38が介在さ
れている。レバー35は屈曲部が器台13に固定軸36により
軸支され、他片が電磁石37のプランジャ48に連結されて
いる。電磁石37は有極の双安定型であって第２の可動接
触子２の接触位置および開離位置の各状態を保持し、電
磁石37に一方向に通電するとプランジャ48が一方向に動
作し、そのためレバー35が回動して第２の可動接触子２
が動作する。39は電磁石37の遠隔操作用端子である。The second movable contact 2 has a second movable contact 7 that comes into contact with and separates from the first movable contact 6 at the ON position of the first movable contact 1. The second movable contact 2 has an intermediate portion pivotally supported by one piece of an L-shaped lever 35, and a contact pressure spring 38 interposed at a rear end portion. The bent portion of the lever 35 is supported by the base 13 by a fixed shaft 36, and the other end is connected to the plunger 48 of the electromagnet 37. The electromagnet 37 is a polarized bistable type, holds the state of the contact position and the separation position of the second movable contact 2, and when the electromagnet 37 is energized in one direction, the plunger 48 operates in one direction, Therefore, the lever 35 rotates and the second movable contact 2
Works. Reference numeral 39 denotes a terminal for remote control of the electromagnet 37.
第１の可動接触子と第２の可動接触子２の先端部は、
器台13の短絡検出用電磁石28の下部に形成された消弧室
39に進入している。The distal ends of the first movable contact and the second movable contact 2 are:
An arc-extinguishing chamber formed below the short-circuit detecting electromagnet 28 of the base 13.
You have entered 39.
第１のアーク走行板３は、第１の可動接触子１のオフ
位置側に先端が位置する。実施例の第１のアーク走行板
３は短絡検出用電磁石28のヨーク40の下面に一体に固定
されている。この場合、第１の可動接触子１と機構部12
のフレーム（図示せず）とが可撓性のリード線により接
続されているため、フレームに保持されたヨーク40を介
して第１の可動接触子１と第１のアーク走行板３とが同
電位となる。また過電流検出用バイメタル27の基端がフ
レームに固定され、先端と短絡検出用電磁石28のコイル
28aの一端とが可撓性のリード線により接続され、コイ
ル28aの他端が端子45に接続されている。The tip of the first arc traveling plate 3 is located on the off position side of the first movable contact 1. The first arc traveling plate 3 of the embodiment is integrally fixed to the lower surface of the yoke 40 of the electromagnet 28 for detecting a short circuit. In this case, the first movable contact 1 and the mechanism 12
Of the first movable contact 1 and the first arc traveling plate 3 via the yoke 40 held by the frame. Potential. The base of the overcurrent detection bimetal 27 is fixed to the frame, and the tip and the coil of the short-circuit detection electromagnet 28 are fixed.
One end of 28a is connected by a flexible lead wire, and the other end of coil 28a is connected to terminal 45.
第２のアーク走行板４は、第２の可動接触子２の開離
位置側に第２の可動接触子２と略平行に位置する電路連
結部８を有し、電路連結部８より第２の可動接触子２の
接触位置の先端部に接近する延出部９を有し、延出部９
より第２の可動接触子２の先方から遠ざかる方向に延び
るアークガス遮蔽部10を有し、さらにアークガス遮蔽部
10から第１のアーク走行板３に平行に延びるアーク走行
部11を有する。電路連結部８と第２の可動接触子２およ
び第２の可動接触子２と端子42とがそれぞれ可撓性のリ
ード線（図示せず）により接続されている。The second arc traveling plate 4 has an electric circuit connecting portion 8 located substantially in parallel with the second movable contact 2 on the side of the separation position of the second movable contact 2, and the second electric traveling plate 4 has a second position from the electric circuit connecting portion 8. And an extension 9 approaching the tip of the contact position of the movable contact 2
An arc gas shielding portion extending further in a direction away from the tip of the second movable contactor;
An arc traveling section 11 extends from 10 to the first arc traveling plate 3 in parallel. The electric circuit connecting portion 8 is connected to the second movable contact 2, and the second movable contact 2 is connected to the terminal 42 by a flexible lead wire (not shown).
消弧グリッド５は、第１のアーク走行板３と第２のア
ーク走行板４との間に介在されている。The arc-extinguishing grid 5 is interposed between the first arc traveling plate 3 and the second arc traveling plate 4.
44はアークガス還流側板であり、第１図および第２図
に示すように第１の可動接触子１および第２の可動接触
子２の両側で第２のアーク走行板４の両側を挾むように
配設され、第１の可動接触子１のオン位置側すなわち第
１の可動接点６と第２の可動接点７の接点接触位置の両
側に第１の切欠44aを形成するとともに、第２の可動接
触子２の開離位置側で電路連結部８との間に開く第２の
切欠44bを形成している。第１の可動接点６および第２
の可動接点７の開離によりアークとともに発生したアー
クガスは第１の切欠44aを通してアークガス還流側板44
の外側に流れ出しさらに第２の切欠44bから第２の可動
接触子２と電路連結部８との間のスペース46内に進入し
て、アークを消弧グリッド５の方向に推進する役割を果
たす。Reference numeral 44 denotes an arc gas recirculation side plate which is arranged so as to sandwich both sides of the second arc traveling plate 4 on both sides of the first movable contact 1 and the second movable contact 2 as shown in FIGS. A first notch 44a is formed on the ON position side of the first movable contact 1, that is, on both sides of the contact position between the first movable contact 6 and the second movable contact 7, and the second movable contact is formed. A second notch 44b that opens between the terminal 2 and the electric circuit connecting portion 8 at the separation position side is formed. First movable contact 6 and second movable contact 6
The arc gas generated together with the arc due to the opening of the movable contact 7 through the first notch 44a passes through the first notch 44a.
And flows into the space 46 between the second movable contact 2 and the electric circuit connecting portion 8 from the second notch 44b to promote the arc in the direction of the arc-extinguishing grid 5.
なお、43は排気孔、49は第２の可動接触子２の表示部
であり、固定軸（図示せず）により器台13に軸支され、
レバー12に連動して回動し、覗き窓50より覗き見され
る。In addition, 43 is an exhaust hole, 49 is a display part of the second movable contact 2, and is supported by the base 13 by a fixed shaft (not shown).
It rotates in conjunction with the lever 12 and is viewed through the viewing window 50.
この実施例によれば、異常時に第１の可動接触子１が
開極し、第１の可動接点６と第２の可動接点７との間に
アークが発生した場合、アークは第１の可動接触子１お
よび第２の可動接触子２から第１のアーク走行板３およ
び第２のアーク走行板４に移動し、消弧グリッド５によ
り分割される。このとき、アークガスが第２の可動接触
子２と電路連結部８との間のスペース46に広がるのを第
２のアーク走行板４のアークガス遮蔽部10により遮蔽さ
れ、すべて消弧グリッド５へ流れるため、アークが第２
のアーク走行板４へ容易に移動でき、さらに消弧グリッ
ド５の方へアークガスの流れに押されて迅速に移動す
る。とくに第１の可動接触子１のオン位置の近傍の第１
の切欠44aおよび第２の可動接触子２の開離位置側の第
２の切欠44aを有するアークガス還流側板44を設けたた
め、第１の可動接点６および第２の可動接点７間に発生
したアークガスを第１の切欠44aからアークガス還流側
板44の外側に出し、第２の切欠44bから第２の可動接点
７の後方へ戻すことにより、より早くアークを消弧グリ
ッドに導くことができ、このとき第２のアーク走行板４
のアークガス遮蔽部10により、アークガスが第２の可動
接点７の後方で拡散することがなくアークの推進を高め
る。また第１の可動接触子１の先端部はオフ位置で第１
のアーク走行板３の方向に向いているため、第１のアー
ク走行板３にアークが移動しやすい。According to this embodiment, when the first movable contact 1 is opened at the time of an abnormality and an arc is generated between the first movable contact 6 and the second movable contact 7, the arc is moved to the first movable contact. It moves from the contact 1 and the second movable contact 2 to the first arc traveling plate 3 and the second arc traveling plate 4 and is divided by the arc extinguishing grid 5. At this time, the arc gas is prevented from spreading in the space 46 between the second movable contact 2 and the electric circuit connecting portion 8 by the arc gas shielding portion 10 of the second arc traveling plate 4, and all of the arc gas flows to the arc extinguishing grid 5. Because of the arc
Can be easily moved to the arc traveling plate 4 and quickly moved toward the arc extinguishing grid 5 by the flow of the arc gas. In particular, the first movable contact 1 near the ON position of the first movable contact 1
Is provided between the first movable contact 6 and the second movable contact 7 because the arc gas recirculation side plate 44 having the notch 44a of the second movable contact 2 and the second notch 44a at the separation position side of the second movable contact 2 is provided. From the first notch 44a to the outside of the arc gas recirculation side plate 44, and from the second notch 44b to the rear of the second movable contact 7, the arc can be led to the arc extinguishing grid more quickly. Second arc running plate 4
The arc gas shield 10 enhances the propulsion of the arc without the arc gas being diffused behind the second movable contact 7. The tip of the first movable contact 1 is in the first position at the off position.
, The arc easily moves to the first arc traveling plate 3.
第３図において、Ｉはこの実施例のアーク電流波形、
Ｖはこの実施例のアーク電圧波形、Ｉ′は従来例のアー
ク電流波形、Ｖ′は従来例のアーク電圧波形である。ま
たａは第２のアーク走行板４にアークが移動したときの
アーク電圧、ｂは第１のアーク走行板３へアークが移動
したときのアーク電圧、ｃは消弧グリッド５へアークが
移動したときのアーク電圧である。これらの図から明ら
かなように、この実施例は従来例と比較して、より一層
早くアークを消弧グリッド５に移動させることができ、
アーク電圧を早く立ち上げ、限流を早くして通過エネル
ギを少なくできるので遮蔽性能を向上することができ
る。In FIG. 3, I is the arc current waveform of this embodiment,
V is the arc voltage waveform of this embodiment, I 'is the arc current waveform of the conventional example, and V' is the arc voltage waveform of the conventional example. A is the arc voltage when the arc moves to the second arc traveling plate 4, b is the arc voltage when the arc moves to the first arc traveling plate 3, and c is the arc voltage moves to the arc extinguishing grid 5. The arc voltage at the time. As is apparent from these figures, this embodiment can move the arc to the arc-extinguishing grid 5 more quickly than the conventional example.
Since the arc voltage can be quickly increased, the current limit can be increased, and the passing energy can be reduced, the shielding performance can be improved.
この発明の消弧装置によれば、第１の可動接触子のオ
フ位置で先端部が第１のアーク走行板に向くように先端
部を折曲するとともに、第２のアーク走行板に第２の可
動接触子の後ろ側にアークガスがまわり込むのを防止す
るアークガス遮蔽部を設けたため、従来例と比較して、
より一層早くアークを消弧グリッドに移動させることが
できる。とくに第１の可動接触子のオン位置の近傍の第
１の切欠および第２の可動接触子の開離位置側の第２の
切欠を有するアークガス還流側板を設けたため、第１の
可動接点および第２の可動接点間に発生したアークガス
を第１の切欠からアークガス還流側板の外側に出し、第
２の切欠から第２の可動接点の後方へ戻すことにより、
さらにより早くアークを消弧グリッドに導くことがで
き、このとき第２のアーク走行板のアークガス遮蔽部に
より、アークガスが第２の可動接点の後方で拡散するこ
とがなくアークの推進を高める。したがって、アーク電
圧を早く立ち上げ、限流を早くして通過エネルギを少な
くできるので遮蔽性能を向上することができるという効
果がある。According to the arc extinguishing device of the present invention, the tip is bent at the off position of the first movable contact so that the tip faces the first arc traveling plate, and the second arc traveling plate is bent at the second arc traveling plate. Because an arc gas shielding part is provided behind the movable contact to prevent the arc gas from circling, compared to the conventional example,
The arc can be moved to the arc-extinguishing grid even faster. In particular, since the arc gas recirculation side plate having the first notch near the ON position of the first movable contact and the second notch near the separation position of the second movable contact is provided, the first movable contact and the second By discharging the arc gas generated between the two movable contacts from the first notch to the outside of the arc gas recirculation side plate and returning the arc gas from the second notch to the rear of the second movable contact,
The arc can be guided to the arc-extinguishing grid even earlier, and the arc gas shield of the second arc running plate enhances arc propulsion without the arc gas diffusing behind the second movable contact. Therefore, the arc voltage can be quickly increased, the current limit can be increased, and the passing energy can be reduced, so that the shielding performance can be improved.
第１図はこの発明の一実施例を適用したリモートコント
ロール式回路しゃ断器の断面図、第２図はその消弧装置
の部分斜視図、第３図はアーク電圧およびアーク電流の
波形図、第４図は従来例の断面図である。 １……第１の可動接触子、２……第２の可動接触子、３
……第１のアーク走行板、４……第２のアーク走行板、
５……消弧グリッド、６……第１の可動接点、７……第
２の可動接点、８……電路連結部、９……延出部、10…
…アークガス遮蔽部、11……アーク走行部、44……アー
クガス還流側板、44a……第１の切欠、44b……第２の切
欠FIG. 1 is a sectional view of a remote control circuit breaker to which one embodiment of the present invention is applied, FIG. 2 is a partial perspective view of the arc extinguishing device, FIG. 3 is a waveform diagram of arc voltage and arc current, and FIG. FIG. 4 is a sectional view of a conventional example. 1... First movable contact 2... Second movable contact 3
... a first arc traveling plate, 4 ... a second arc traveling plate,
5 ... arc extinguishing grid, 6 ... first movable contact, 7 ... second movable contact, 8 ... electric circuit connecting part, 9 ... extension part, 10 ...
... Arc gas shielding part, 11 ... Arc running part, 44 ... Arc gas recirculation side plate, 44a ... First notch, 44b ... Second notch
Claims (1)
スリップ開極する第１の可動接触子と、この第１の可動
接触子のオン位置の前記第１の可動接点に接離する第２
の可動接点を先端部に有する第２の可動接触子と、前記
第１の可動接触子のオフ位置側に先端が位置する第１の
アーク走行板と、前記第２の可動接触子の開離位置側に
前記第２の可動接触子と略平行に位置する電路連結部を
有し前記電路連結部より前記第２の可動接触子の接触位
置の前記先端部に接近する延出部を有し前記延出部より
前記第２の可動接触子の先方から遠ざかる方向に延びる
アークガス遮蔽部を有しさらに前記アークガス遮蔽部か
ら前記第１のアーク走行板に平行に延びるアーク走行部
を有する第２のアーク走行板と、前記第１のアーク走行
板と第２のアーク走行板との間に介在された消弧グリッ
ドと、前記第１の可動接触子および前記第２の可動接触
子の両側に配置されて前記第１の可動接触子の前記オン
位置の近傍に形成された第１の切欠を有するとともに前
記第２の可動接触子の前記開離位置側に形成された第２
の切欠を有するアークガス還流側板とを備え、前記第１
の可動接触子の前記先端部はオフ位置で前記第１のアー
ク走行板に向くように折曲されている消弧装置。1. A first movable contact having a first movable contact at a tip portion and slip-opening in an abnormal state and contacting the first movable contact at an ON position of the first movable contact. Second to release
A second movable contact having a movable contact at a distal end thereof, a first arc traveling plate having a distal end located at an off-position side of the first movable contact, and separation of the second movable contact. A position side has an electric circuit connecting portion located substantially parallel to the second movable contact, and has an extending portion approaching from the electric circuit connecting portion to the front end portion at the contact position of the second movable contact. A second arc contact portion having an arc gas shielding portion extending in a direction away from the tip of the second movable contact from the extension portion, and further having an arc traveling portion extending from the arc gas shielding portion in parallel to the first arc traveling plate. An arc traveling plate, an arc-extinguishing grid interposed between the first arc traveling plate and the second arc traveling plate, and arranged on both sides of the first movable contact and the second movable contact. Formed near the ON position of the first movable contact. The second formed on the separable position side of the second movable contact has a first notch which is
An arc gas recirculation side plate having a notch of
The arc extinguishing device, wherein the tip of the movable contact is bent at the off position so as to face the first arc traveling plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2077644A JP2574505B2 (en) | 1990-03-27 | 1990-03-27 | Arc extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2077644A JP2574505B2 (en) | 1990-03-27 | 1990-03-27 | Arc extinguishing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03276533A JPH03276533A (en) | 1991-12-06 |
| JP2574505B2 true JP2574505B2 (en) | 1997-01-22 |
Family
ID=13639604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2077644A Expired - Lifetime JP2574505B2 (en) | 1990-03-27 | 1990-03-27 | Arc extinguishing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2574505B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5269925A (en) * | 1992-05-04 | 1993-12-14 | Exxon Research And Engineering Company | Filter comprising multiple layers of non-woven filter fabric of decreasing porosity |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59128726A (en) * | 1983-01-14 | 1984-07-24 | 松下電工株式会社 | Remote control type circuit breaker |
| JPH07118252B2 (en) * | 1988-06-09 | 1995-12-18 | 松下電工株式会社 | Remote control type circuit breaker |
-
1990
- 1990-03-27 JP JP2077644A patent/JP2574505B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03276533A (en) | 1991-12-06 |
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