JPS62198025A - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- JPS62198025A JPS62198025A JP3917486A JP3917486A JPS62198025A JP S62198025 A JPS62198025 A JP S62198025A JP 3917486 A JP3917486 A JP 3917486A JP 3917486 A JP3917486 A JP 3917486A JP S62198025 A JPS62198025 A JP S62198025A
- Authority
- JP
- Japan
- Prior art keywords
- movable core
- tripping
- shaft
- circuit breaker
- instantaneous
- 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
Links
- 230000002730 additional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Landscapes
- Breakers (AREA)
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】
〔発明の利用分野〕
本発明は、瞬時引きはずし動作を行うために電磁石を用
いた回路遮断器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to circuit breakers that use electromagnets to perform instantaneous tripping operations.
従来の瞬時引きはずし用電磁石を備えた回路遮断器の引
きはずし機構部を第５図に示す。この引きはずし機構は
時延引きはずし用バイメタルｌと瞬時引きはずし用電磁
石２を併用したもので、瞬時引きはずし用電磁石２は導
電部であるヒータ３を挟み対向して位置する固定コア４
と可動コア５を備え、可動コア５は電磁石全体を支える
支持枠７に支点部６を中心として回動自在に支持され、
可動コア５と支持枠７との間に装着された可動コア戻し
ばね８により常に反時計方向に付勢されている。固定コ
ア４と可動コア５０間に位置する各極共通の引きはずし
軸９は、常時そのラッチ部９αで軸１１を中心として回
動する掛金ｌＯと係合し、掛金１０を開閉機構のフック
１２と係合した状態に保持している。引きはずし軸９と
掛金ｌＯはばね１３により時計方向の回転力を与えられ
、常時図示の静止位置にあるヒータ３に瞬時引きはずし
動作の整定値以上の電流が流れると、その誘導磁束によ
り、固定コア４は可動コア戻しばね８に打ち勝って可動
コア５を吸引する。この電磁力により、可動コア５は支
点部６を中心として時計方向に回動し引きはずし軸９の
下方突出部９ｈをたたいて、引きはずし軸９をばね１３
に打ち勝って反時計方向に回動させる。FIG. 5 shows a tripping mechanism of a circuit breaker equipped with a conventional instantaneous tripping electromagnet. This tripping mechanism uses a bimetal l for time-delayed tripping and an electromagnet 2 for instantaneous tripping, and the electromagnet 2 for instantaneous tripping is a fixed core 4 located opposite to each other with a heater 3, which is a conductive part, in between.
and a movable core 5, the movable core 5 is rotatably supported around a fulcrum 6 by a support frame 7 that supports the entire electromagnet,
The movable core return spring 8 installed between the movable core 5 and the support frame 7 always biases the movable core in the counterclockwise direction. The tripping shaft 9 common to each pole located between the fixed core 4 and the movable core 50 is always engaged with the latch lO which rotates around the shaft 11 at its latch portion 9α, and the latch 10 is connected to the hook 12 of the opening/closing mechanism. It is held in an engaged state. The tripping shaft 9 and the latch lO are given a clockwise rotational force by the spring 13, and when a current exceeding the set value for the instantaneous tripping operation flows through the heater 3, which is always at the rest position shown in the figure, the induced magnetic flux locks the tripping shaft 9 and the latch lO. The core 4 overcomes the movable core return spring 8 and attracts the movable core 5. Due to this electromagnetic force, the movable core 5 rotates clockwise about the fulcrum 6 and hits the lower protrusion 9h of the tripping shaft 9, causing the tripping shaft 9 to spring 13
to overcome this and rotate it counterclockwise.
引きはずし軸９の回動により、ラッチ部９αが掛金ＩＯ
からはずれると、掛金ＩＯの軸１１を中心とする時計方
向への回動により、フック１２が釈放されてはね上がる
。これにより、開閉機構は可動接点を支える可動フレー
ム１４を軸１５を中心として時計方向に回動させ、接点
を開放するに至る。可動コア５は、１ｉ流遮断後、可動
コア戻しばね８により図示位置に自動復帰する構成とな
っている。Due to the rotation of the tripping shaft 9, the latch portion 9α is turned into the latch IO.
When released from the hook 12, the hook 12 is released and springs up due to clockwise rotation of the latch IO about the shaft 11. As a result, the opening/closing mechanism rotates the movable frame 14 that supports the movable contact clockwise about the shaft 15, thereby opening the contact. The movable core 5 is configured to automatically return to the illustrated position by a movable core return spring 8 after the flow 1i is interrupted.
このような従来の回路遮断器では、引きはずし機構の構
造上、１１ｓ、動機始動時の突入電流などのような瞬時
引きはずし動作の整定値より少し小さめの１ＪＬ流が数
回繰返して流れると、瞬時引きはずし動作するに至り（
以下、履歴による引きはずし動作という）、実使用上誤
動作となる不具合があった。これは、瞬時引きはずし動
作の整定値より少し小さめの電流が流れた場合、。In such conventional circuit breakers, due to the structure of the tripping mechanism, if a 1JL current, which is slightly smaller than the set value for instantaneous tripping operation such as 11 seconds or inrush current when starting a motor, flows several times, It resulted in an instantaneous tripping operation (
(hereinafter referred to as "tripping operation due to history"), which caused malfunctions in actual use. This occurs when a current that is slightly smaller than the set value for instantaneous trip operation flows.
電磁力により可動コア５が引きはずし軸９の下方突出部
９ｂに当る位置、まで移動して、引きはずし軸９から反
力を受けて戻され、その際、引ぎはずし軸９が押されて
反時計方向にわずかながら回動し、ラッチ部９αと掛金
１０の係合面にずれが生じる（係合面の摩擦力によりず
れが戻らない）ため、数回これを繰返すうちにラッチ部
９αと掛金１０のラップ寸法ｌが次第に小さくなり。The movable core 5 is moved by electromagnetic force to a position where it touches the downward protrusion 9b of the tripping shaft 9, and is returned by receiving a reaction force from the tripping shaft 9. At this time, the tripping shaft 9 is pushed. As the latch part 9α and the latch 10 rotate slightly in the counterclockwise direction, the engagement surfaces of the latch part 9α and the latch 10 become misaligned (the misalignment does not return due to the frictional force of the engagement surfaces), so by repeating this several times, the latch part 9α and The lap dimension l of the latch 10 gradually becomes smaller.
引きはずし動作してしまうもので、その対策として、ラ
ップ寸法ｌをあ−らかじめ狭く設定し。This causes a tripping operation, and as a countermeasure, the wrap dimension l is set narrow in advance.
瞬時引きはず１．動作の整定値以上の電流が流れるまで
、可動コア５が引きはずし軸９に当らなくすることで対
処しようとすると、引きはずし機構の調整が困難になる
。Instantaneous pull 1. If an attempt is made to deal with this by preventing the movable core 5 from hitting the tripping shaft 9 until a current equal to or higher than the set value for operation flows, it will become difficult to adjust the tripping mechanism.
従来、外部からの振動、衝撃や開閉操作による回路遮断
器の誤動作については、特開昭５６−２８４３０号に見
られるように種々の対策が講じられているが、上記の履
歴による引きはずし動作については、有効な対策がなか
った。Conventionally, various countermeasures have been taken to prevent circuit breakers from malfunctioning due to external vibrations, shocks, or opening/closing operations, as seen in Japanese Patent Laid-Open No. 56-28430. There were no effective measures.
本発明の目的は、履歴による引きはずし動作を防上して
信頼性を向上させることが容易にできろ回路遮断器を提
供することにある。An object of the present invention is to provide a circuit breaker that can easily prevent tripping operations due to history and improve reliability.
上記目的は、瞬時引きはずし用電磁石を、その可動コア
が可動コア戻しばねの死点を越えて移動することにより
引きはずし軸を動作させる構成とすることによって達成
される。The above object is achieved by configuring the instantaneous tripping electromagnet so that its movable core moves beyond the dead center of the movable core return spring to operate the tripping shaft.
以下１本発明の一実施例を第１図〜第４図により説明す
る。An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.
第１図は引きはずし機構部の遮断器投入時の状態を示し
、第２図は瞬時引きはずし動作直後の状態を示す。第１
図、第２図に示す回路遮断器の引きはずし機構は、第５
図と同様に１時延引きはずし用バイメタルｌと瞬時引き
はずし用電磁石２を併用している。また、瞬時引きはず
し用電磁石２が導電部であるヒータ３を挟み対向して位
置する固定コア４と可動コア５を有しこれら２つのコア
間の電磁力により各極共通の引きはずし軸９を動作させ
ることも第５図に示す従来例と同様であるが、可動コア
５の構造とその動作が従来例と異なっている。FIG. 1 shows the state of the tripping mechanism section when the circuit breaker is closed, and FIG. 2 shows the state immediately after the instantaneous tripping operation. 1st
The tripping mechanism of the circuit breaker shown in Figs.
As shown in the figure, a bimetal l for one-hour tripping and an electromagnet 2 for instantaneous tripping are used together. In addition, the instantaneous tripping electromagnet 2 has a fixed core 4 and a movable core 5 that are located opposite to each other with a heater 3, which is a conductive part, in between, and the electromagnetic force between these two cores causes a common tripping shaft 9 for each pole. The operation is also similar to the conventional example shown in FIG. 5, but the structure of the movable core 5 and its operation are different from the conventional example.
第３図に詳細図示したように３本実施例における可動コ
ア５は、上部可動コア５αと下部可動コア５ｂをビン１
Ｇで結合して構成されており、下部可動コア５ｈは電磁
石全体を支え゛る支持枠７に支点部６で回動自在に支持
され、上部可動コア５αはさらにビン１６を中心として
回動可能となっている。可動コア戻しばね８は、上部可
動コア５αの先端にあるばね取付部１７と支持枠７の支
点部６より下方にあるばね取付部１８との間に左右１個
ずつ取付けられている。支持枠７には、常時下部可動コ
ア５ｈと当る位置にストッパ１９が設けられており、ま
た上部可動コア５αと回路遮断器の接点を支える可動フ
レーム１４には、引きはずし動作後、可動コア全体を動
作前の位置に戻すための互に係合する突出部２０ 、２
１が設けられている。As shown in detail in FIG. 3, the movable cores 5 in the three embodiments include an upper movable core 5α and a lower movable core 5b.
The lower movable core 5h is rotatably supported at a fulcrum 6 by a support frame 7 that supports the entire electromagnet, and the upper movable core 5α is further rotatable about a bin 16. It becomes. One movable core return spring 8 is mounted on each side between a spring mounting portion 17 at the tip of the upper movable core 5α and a spring mounting portion 18 located below the fulcrum portion 6 of the support frame 7. The support frame 7 is provided with a stopper 19 at a position where it is always in contact with the lower movable core 5h, and the movable frame 14 that supports the contact between the upper movable core 5α and the circuit breaker is provided with a stopper 19 that stops the entire movable core after the tripping operation. interengaging projections 20, 2 for returning the
1 is provided.
次に１本実施例における瞬時引きはずし用電磁石の動作
を第４図により説明する。Next, the operation of the instantaneous tripping electromagnet in this embodiment will be explained with reference to FIG.
第４図は、引きはずし動作時の可動コア５と可動コア戻
しばね８の動きを線図的に示したものである。通常は、
同図（ｃＬ）に示すように上部可動コア５αと下部可動
コア５ｈが１直線状となって前記ストッパ１９で支えら
れており、可動コア戻しばね８は支点部６およびビン１
６より左側にあって、可動コア５全体を反時計方向に付
勢している。可動コア５が電磁力により支点部６を中心
として時計方向に回動し、同図（ｈ）に示すように、上
部可動コア５αと下部可動コア５ｈが可動コア戻しばね
８と平行になる。いわゆるばねの死点位置に到達すると
、ばね力は支点部６を通る直線方向に働く。さらに可動
コア５が回動すると、可動コア戻しばね８の付勢方向が
反転し。FIG. 4 diagrammatically shows the movements of the movable core 5 and the movable core return spring 8 during the tripping operation. Normally,
As shown in the figure (cL), the upper movable core 5α and the lower movable core 5h are supported by the stopper 19 in a straight line, and the movable core return spring 8 is connected to the fulcrum portion 6 and the bin 1.
6, and biases the entire movable core 5 in the counterclockwise direction. The movable core 5 rotates clockwise about the fulcrum 6 by electromagnetic force, and the upper movable core 5α and the lower movable core 5h become parallel to the movable core return spring 8, as shown in FIG. When the so-called dead center position of the spring is reached, the spring force acts in a straight line direction passing through the fulcrum portion 6. When the movable core 5 further rotates, the biasing direction of the movable core return spring 8 is reversed.
同図（Ｃ）に示すように、ばね力により上部可動コア５
αがピン１６を中心として単独で回動する。このとき、
第２図に示すように、上部可動コア５αが引きはずし軸
９の下方突出部９ｂをたたき、引きはずし軸９を反時計
方向に回動させることにより、掛金１０が引きはずし軸
９のラッチ部９αからはずれて開閉機構のフック１２を
釈放し、その結果、開閉機構は可動接点を支える可動フ
レーム１４を軸１５を中心として時計方向に回動させ。As shown in the same figure (C), the upper movable core 5 is
α rotates independently around the pin 16. At this time,
As shown in FIG. 2, the upper movable core 5α hits the lower protrusion 9b of the trip shaft 9 and rotates the trip shaft 9 counterclockwise, so that the latch 10 is moved to the latch portion of the trip shaft 9. 9α and releases the hook 12 of the opening/closing mechanism, and as a result, the opening/closing mechanism rotates the movable frame 14 supporting the movable contact clockwise about the shaft 15.
接点を開放するに至る。ばね８の死点な越えて移動した
可動コア５は、接点開放時に可動フレーム１４の突出部
２１が上部可動コア５αの突出部２０に係合し、上部可
動コア５αを反時計方向に回動させることにより０元の
位置に戻すことができる本実施例では１回路遮断器の導
電部３に瞬時引きはずし動作の整定値以上の電流が流れ
なければ、可動コア５が可動コア戻しばね８の死点を越
えて移動しないように設定する。そうすれば、瞬時引き
はずし動作の整定値より小さい電動機始動時の突入電流
などでは、可動コア５は死点位置の手前でばね８により
押し戻され、引きばずし軸９に当る位置まで移動するこ
とがないので、従来のような履歴による引きはずし動作
は起こらない。しかも、可動コア５かばね８０死点を越
えて移動した場合は、ばね８の付勢力向の反転により引
きはすし軸９を急速に動作させるので、第１図に示すラ
ッチ部９αと掛金ｌＯのラップ寸法ｌを大きくとること
ができ、引きはずし機構の調整は容易にできる。また、
ばね８０死点を越えて移動させるには、可動コア５が一
体構造であってもよいが０本実施例のように可動コア５
を上下に分割し、上部可動コア５αと下部可動コア５ｂ
をビン１６で結合した構成とすれば、ばね８の死点を越
えた後は、上部可動コア５αがピン１６を中心として単
独で回動するのでばね８の付勢方向の反転に加え、可動
コア５の慣性質量も減少して、瞬時引きはずし動作を全
電流領域にわたりさらに高速で行わせることができ１回
路遮断器の遮断容量の向上が図れるという付加的効果が
得られる。This leads to the contact being opened. When the movable core 5 has moved beyond the dead point of the spring 8, the protrusion 21 of the movable frame 14 engages with the protrusion 20 of the upper movable core 5α when the contact is opened, and the upper movable core 5α is rotated counterclockwise. In this embodiment, if a current equal to or higher than the set value for the instantaneous trip operation does not flow through the conductive part 3 of the circuit breaker, the movable core 5 releases the movable core return spring 8. Set it so that it does not move beyond the dead center. By doing so, in the event of a rush current at the time of starting the motor that is smaller than the set value for the instantaneous tripping operation, the movable core 5 will be pushed back by the spring 8 just before the dead center position and will move to the position where it hits the tripping shaft 9. Therefore, the tripping operation based on the history as in the conventional case does not occur. Moreover, when the movable core 5 moves beyond the dead center of the spring 80, the direction of the biasing force of the spring 8 is reversed and the pulling shaft 9 is rapidly operated. The lap dimension l can be made large, and the tripping mechanism can be easily adjusted. Also,
In order to move the spring 80 beyond the dead center, the movable core 5 may have an integral structure, but as in this embodiment, the movable core 5
is divided into upper and lower parts, an upper movable core 5α and a lower movable core 5b.
If the configuration is such that the upper movable core 5α rotates independently around the pin 16 after the dead center of the spring 8 is passed, in addition to reversing the biasing direction of the spring 8, the movable core 5α The inertial mass of the core 5 is also reduced, resulting in the additional effect that the instantaneous tripping operation can be performed at a higher speed over the entire current range, and the breaking capacity of the single circuit breaker can be improved.
本発明によれば０回路遮断器の導電部に瞬時引きはずし
動作の整定値以上の電流が流れた場合のみ、瞬時引きは
ずし用電磁石の可動コアが可動コア戻しばねの死点を越
えて移動し、ばねの付勢方向の反転により引きはずし軸
を急速に動作させる構成としたため、引きはずし軸のラ
ツ井抽シ彰仝のうツブ寸法シ牌めＡととた〈−電動機始
動時の突入電流などにより発生する履歴による引きはず
し動作を防止し、信頓性を高めることが容易にできる。According to the present invention, the movable core of the instantaneous tripping electromagnet moves beyond the dead center of the movable core return spring only when a current equal to or higher than the set value for instantaneous tripping flows through the conductive part of the zero-circuit breaker. Since the trip shaft is configured to operate rapidly by reversing the biasing direction of the spring, the diameter of the trip shaft bolt is set to A. It is possible to easily prevent the tripping operation due to the history that occurs due to such reasons, and increase credibility.
第１図は本発明の一実施例の遮断器投入時の状態を示す
切断側面図、第２図は同じく瞬時引きはずし動作直後の
状態を示す切断側面図、第３図は本実施例における断時
引きはずし用電磁石の分解斜視図、第４図（αｌ 、
（ｂｌ 、 （Ｃ）はその動作説明用線図、第５図は従
来の回路遮断器の引きはずし機構部を示す切断側面図で
ある。
２・・・瞬時引きはずし用電磁石。
３・・・導電部、 ４・・・固定コア。
５・・・可動コア、 ８・・・可動コア戻しば
ね９・・・引きはずし軸。
／″へゝ＼１
ｆｌ、・
＼１７．、FIG. 1 is a cutaway side view showing the state when the circuit breaker is closed according to an embodiment of the present invention, FIG. 2 is a cutaway side view showing the state immediately after the instantaneous tripping operation, and FIG. An exploded perspective view of the time tripping electromagnet, Figure 4 (αl,
(bl, (C) is a diagram for explaining its operation, and FIG. 5 is a cutaway side view showing the tripping mechanism of a conventional circuit breaker. 2... Instantaneous tripping electromagnet. 3... Conductive part, 4... Fixed core. 5... Movable core, 8... Movable core return spring 9... Tripping shaft.
Claims (1)
磁力により引きはずし軸を動作させる瞬時引きはずし用
電磁石を備えた回路遮断器において、上記瞬時引きはず
し用電磁石を、その可動コアが可動コア戻しばねの死点
を越えて移動することにより引きはずし軸を動作させる
ように構成したことを特徴とする回路遮断器。In a circuit breaker equipped with an instantaneous tripping electromagnet that operates a tripping shaft by electromagnetic force between fixed and movable cores located opposite to each other with a conductive part in between, the instantaneous tripping electromagnet is connected to the movable core. A circuit breaker characterized in that the trip shaft is operated by moving the movable core return spring beyond its dead center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3917486A JPS62198025A (en) | 1986-02-26 | 1986-02-26 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3917486A JPS62198025A (en) | 1986-02-26 | 1986-02-26 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62198025A true JPS62198025A (en) | 1987-09-01 |
Family
ID=12545750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3917486A Pending JPS62198025A (en) | 1986-02-26 | 1986-02-26 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62198025A (en) |
-
1986
- 1986-02-26 JP JP3917486A patent/JPS62198025A/en active Pending
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