JPH03167729A - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- JPH03167729A JPH03167729A JP30680389A JP30680389A JPH03167729A JP H03167729 A JPH03167729 A JP H03167729A JP 30680389 A JP30680389 A JP 30680389A JP 30680389 A JP30680389 A JP 30680389A JP H03167729 A JPH03167729 A JP H03167729A
- Authority
- JP
- Japan
- Prior art keywords
- arc
- fixed contact
- load terminal
- abnormal current
- movable contact
- 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
- 230000002159 abnormal effect Effects 0.000 claims abstract description 28
- 239000004065 semiconductor Substances 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 22
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- XAUTYMZTJWXZHZ-IGUOPLJTSA-K bismuth;(e)-1-n'-[2-[[5-[(dimethylamino)methyl]furan-2-yl]methylsulfanyl]ethyl]-1-n-methyl-2-nitroethene-1,1-diamine;2-hydroxypropane-1,2,3-tricarboxylate Chemical compound [Bi+3].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O.[O-][N+](=O)\C=C(/NC)NCCSCC1=CC=C(CN(C)C)O1 XAUTYMZTJWXZHZ-IGUOPLJTSA-K 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Landscapes
- Breakers (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、回路しゃ断器に関するものである。[Detailed description of the invention] [Industrial application field] This invention relates to a circuit breaker.
従来、たとえば特開昭５９−６６０３０号は、半導体素
子を回路しゃ断器の固定接触子に直列に接続し、異常電
流時の可動接触子の開極動作で半導体素子の回路を開く
とともに、可動接触子と固定接触子の接点間にアークが
発生し、このアークの転流により、半導体素子を短絡す
るシャント回路を閉しることにより、半導体素子を異常
電流から保護していた。Conventionally, for example, Japanese Patent Application Laid-Open No. 59-66030 discloses that a semiconductor element is connected in series to a fixed contact of a circuit breaker, and the circuit of the semiconductor element is opened by the opening operation of the movable contact when an abnormal current occurs, and the movable contact An arc is generated between the contacts of the child and the fixed contact, and the commutation of this arc closes a shunt circuit that shorts the semiconductor device, thereby protecting the semiconductor device from abnormal current.
ところが、この回路しゃ断器は、半導体素子により負荷
電流を制御するため定格電流は、せいぜい数十アンペア
程度までが一般的である。However, since this circuit breaker controls the load current using a semiconductor element, the rated current is generally several tens of amperes at most.
このような電流領域では駆動機構の引外し手段に使用さ
れる異常電流検出手段たとえばバイメタルは熱容量が非
常に小さいものとなる。In such a current range, the abnormal current detection means used as the tripping means of the drive mechanism, such as a bimetal, has a very small heat capacity.
そのため、大短絡Ｎｓが流れたときには、回路しゃ断器
で速く電流を切らなければ、バイメタルが溶断してしま
うという危険性があった。Therefore, when a large short circuit Ns occurs, there is a risk that the bimetal will melt unless the current is quickly cut off using a circuit breaker.
したがって、この発明の目的は、半導体素子および異常
電流検出手段を大短絡電流より保護することができる回
路しゃ断器を提供することである。Therefore, an object of the present invention is to provide a circuit breaker that can protect a semiconductor element and abnormal current detection means from a large short circuit current.
この発明の回路しゃ断器は、負荷端子および電ａ端子と
、前記負荷端子に接続された固定接点と、この固定接点
に接離する可動接点を有する可動接触子と、この可動接
触子を駆動する駆動機構と、前記固定接点と前記負荷端
子との間に接続され所定の異常電流を検出して前記駆動
機構を動作させることにより前記可動接触子を開極動作
させる異常電流検出手段と、前記電＃端子側に接続され
たアークホーンと、前記固定接点に近接配置されたアー
ク飛び移り部を有するアークランナと、前記アークホー
ンおよび前記アークランナの間に設けられて前記固定接
点と前記可動接点との間に発生したアークを消弧する消
弧装置と、前記固定接点と前記負荷端子との間で前記異
常電流検出手段に直列に接続された半導体素子と、前記
アークランナと前記負荷端子を接続する短絡回路とを備
えたものである。The circuit breaker of the present invention has a load terminal and an electric terminal A, a fixed contact connected to the load terminal, a movable contact having a movable contact that contacts and separates from the fixed contact, and a movable contact that drives the movable contact. a drive mechanism; an abnormal current detection means connected between the fixed contact and the load terminal to detect a predetermined abnormal current and operate the drive mechanism to open the movable contact; # An arc horn connected to the terminal side, an arc runner having an arc jump portion disposed close to the fixed contact, and an arc runner provided between the arc horn and the arc runner and between the fixed contact and the movable contact. an arc extinguishing device for extinguishing an arc generated in the above, a semiconductor element connected in series to the abnormal current detection means between the fixed contact and the load terminal, and a short circuit connecting the arc runner and the load terminal. It is equipped with the following.
この発明の構成によれば、異常電流が流れて可動接点と
固定接点との間にアークが発生するとアークはアークホ
ーンとアークランナ間を走行して消弧装置により消弧さ
れる。この場合、アークがアークラナンに移行したとき
、アークを通して流れる電流は、転流してアークランナ
より短絡回路を介して負荷端子に直接流れる。アークが
アークランナに移行する時間はアークが発生してから極
めて短時間であるため、固定接点と負荷端子の間に接続
される半導体素子と異常電流検出手段にはアークを通し
た電流がほとんど流れなくなる。そのため熱容量の小さ
い異常電流検出手段や過電流耐量の小さい半導体素子を
大短絡電流より保護することができる。According to the configuration of the present invention, when an abnormal current flows and an arc is generated between the movable contact and the fixed contact, the arc travels between the arc horn and the arc runner and is extinguished by the arc extinguishing device. In this case, when the arc transitions to the arc runner, the current flowing through the arc is commutated and flows directly from the arc runner to the load terminal via the short circuit. Since the time for the arc to move to the arc runner is extremely short after the arc occurs, almost no current flows through the arc to the semiconductor element and abnormal current detection means connected between the fixed contact and the load terminal. . Therefore, the abnormal current detection means with a small heat capacity and the semiconductor element with a small overcurrent resistance can be protected from a large short-circuit current.
この発明の一実施例を第１図および第２図に基づいて説
明する。すなわち、この回路しゃ断器は、器体１５の両
端に負荷瑞子ｌおよび電源端子２を設けている。固定接
点３は負荷端子１に接続され、固定接点３に接離する可
動接点４を有する可動接触子５は駆動Ｗ１構１０により
駆動される。An embodiment of the present invention will be described based on FIGS. 1 and 2. That is, this circuit breaker is provided with a load terminal 1 and a power supply terminal 2 at both ends of a container body 15. The fixed contact 3 is connected to the load terminal 1, and a movable contact 5 having a movable contact 4 that comes into contact with and separates from the fixed contact 3 is driven by a drive W1 mechanism 10.
この駆動機構１０はハンドル１４で可動接触子５をオン
またはオフに操作可能にするとともに、オン時に異常電
流検出千段１ｌの動作により可動接触子５を強制開極す
る。具体的には、異常電流検出手段１１の動作に応動し
て引外しされる引外し手段（図示せず〉と、引外し手段
にラノチされ釈放されることによりトリ・７プ動作して
可動接触子５を強制開極させるランチリンク（図示せず
）と、ランチ状態のラノチリンクに支持されて可動接触
子５をオンまたはオフ操作するハンドルｌ４とを有する
ものであり、このような構成は公知であるので詳細は省
略する。This drive mechanism 10 allows the movable contact 5 to be turned on or off with a handle 14, and when turned on, the movable contact 5 is forcibly opened by the operation of the abnormal current detection stage 1l. Specifically, a tripping means (not shown) is tripped in response to the operation of the abnormal current detection means 11, and a movable contact is triggered by tripping and being released by the tripping means. It has a launch link (not shown) for forcibly opening the contact 5, and a handle l4 supported by the launch link in the launch state to turn on or off the movable contact 5, and such a configuration is known. Therefore, the details will be omitted.
異常電ｉ検出千段ｌ１は第２図に示すようＣこ固定接点
３と負ｒ＃端子１との間に接続され所定の異常電流を検
出して駆動機構ＩＯを動作させることにより可動接触子
５を開極動作させる。この異常電流検出手段ｌ１は、過
電流検出用のハイメタル１１ａと、短絡検出用の電磁石
装置１ｌｂからなる。The abnormal current i detection stage l1 is connected between the C fixed contact 3 and the negative r# terminal 1 as shown in FIG. 5 is opened. This abnormal current detection means 11 consists of a high metal 11a for overcurrent detection and an electromagnet device 1lb for short circuit detection.
一方、アークホーン６が電ａ端子２側に接続され、これ
に対向するアークランナ８は固定接点３に近接配置され
たアーク飛び移り部７を有する。On the other hand, the arc horn 6 is connected to the electric terminal A 2 side, and the arc runner 8 facing this has an arc jump part 7 disposed close to the fixed contact 3.
消弧装置９はアークホーン６とアークランナ８との間に
設けられて固定接点３と可動接点４との間に発生したア
ークを消弧する。この消弧装置９は、アーク吸引用切欠
（図示せず）を形威したグリソド４Ｍ１６を複１ｂ枚所
定間隔をおいて積層し消弧側板１７により保持してなる
消弧グリノドを実施例としている。The arc extinguishing device 9 is provided between the arc horn 6 and the arc runner 8 to extinguish the arc generated between the fixed contact 3 and the movable contact 4. This arc extinguishing device 9 is an embodiment of an arc extinguishing grid made by laminating a plurality of 4M16 grids having arc suction notches (not shown) at a predetermined interval and holding them by an arc extinguishing side plate 17. .
さらにトライテックまたはサイリスクのような半導体素
子ｌ２を、固定接点３と負荷端子１との間で異常電流検
出手段１１に電気的に直列に接続している。Further, a semiconductor element l2 such as Tritec or Cyrisk is electrically connected in series to the abnormal current detection means 11 between the fixed contact 3 and the load terminal 1.
またアークランナ８と負荷端子ｌとの間に短絡回路１３
を接続している。Also, a short circuit 13 is connected between the arc runner 8 and the load terminal l.
are connected.
Ｅは電源である。E is a power source.
この回路しゃ断器は、ハンドル１４をオンにすると可動
接点４が固定接点３に接触することにより電源端子２と
負荷端子ｌとが導通し、負荷に電源Ｅが接続されること
になる。In this circuit breaker, when the handle 14 is turned on, the movable contact 4 comes into contact with the fixed contact 3, so that the power supply terminal 2 and the load terminal 1 are electrically connected, and the power supply E is connected to the load.
負荷に過電流が流れると過電流検出用のハイメタルｌｌ
ａが動作して駆動機ｉｔｏが強制開極し、アークが発生
しない場合には負荷はただちにしゃ断される。High metal ll for overcurrent detection when overcurrent flows through the load.
When a is activated, the driver ito is forcibly opened, and if no arc is generated, the load is immediately cut off.
負荷に過電流より大きな短絡電流が流れると短絡検出用
の電磁石装置１ｌｂが動作して駆動機構１０が強制開極
し、アークが発生した場合にはアークを通して負荷に電
流が流れようとするが、可動接点４の高速開極動作およ
び可動接触子５と固定接点３例の固定接触子となる電路
が平行に相対向することによりアークが消弧装置９側に
駆動されて、数百μｓの短時間でアークがアークランナ
８のアーク飛び移り部７に移行し、これにより短絡電流
は短絡回路ｌ３に転流し、半導体素子ｌ２や異常電流検
出手段ｌ１に短絡電流が流れなくなその後、アークの可
動接点４側もアークホーン６へ飛び移り、アークがアー
クホーン６とアークランナ８０間を走行して消弧装置９
に吸引され分割され冷却されて消弧に至る。When a short circuit current larger than the overcurrent flows through the load, the electromagnetic device 1lb for short circuit detection operates and the drive mechanism 10 is forcibly opened, and if an arc occurs, current attempts to flow through the arc to the load. Due to the high-speed opening operation of the movable contact 4 and the electric circuits of the movable contact 5 and the fixed contacts facing each other in parallel, the arc is driven toward the arc extinguishing device 9, resulting in a short period of several hundred μs. In time, the arc moves to the arc jump part 7 of the arc runner 8, and as a result, the short circuit current is commutated to the short circuit l3, and the short circuit current no longer flows to the semiconductor element l2 or the abnormal current detection means l1, after which the movable contact of the arc 4 side also jumps to the arc horn 6, the arc travels between the arc horn 6 and the arc runner 80, and the arc extinguishing device 9
The arc is sucked in, divided, and cooled to extinguish the arc.
この実施例によれば、負荷に過電流や短絡電流が流れた
時に可動接触子５の開極後速やかに短絡回路１３に転流
し、熱容量の小さいバイメタル１１ａや、過電流耐量の
小さい半導体素子１２を流れる電流が消滅し、異常電流
より保護することができる．
なお、前記実施例は電磁石装？ｉｉｌｌｂも負荷端子ｌ
と固定接点３との間に接続したが、これは可動接点４と
電源端子２の間に設けてもよい．〔発明の効果〕
この発明の回路しゃ断器によれば、異常電流検出手段と
半導体素子を直列に接続して負荷端子と固定接点との間
に接続するとともに、アークランナと負荷端子との間に
短絡回路を設けたため、熱容量の小さい異常電流検出手
段や過電流耐量の小さい半導体素子を大短絡電流より保
護することができるという効果がある．According to this embodiment, when an overcurrent or a short-circuit current flows through the load, it is immediately commutated to the short-circuit circuit 13 after the movable contact 5 is opened, and the bimetal 11a with a small heat capacity or the semiconductor element 12 with a small overcurrent withstand capacity is used. The current flowing through the terminal disappears, providing protection from abnormal current. By the way, is the above embodiment an electromagnetic system? iiilb is also the load terminal l
Although this is connected between the movable contact 4 and the fixed contact 3, it may also be provided between the movable contact 4 and the power supply terminal 2. [Effects of the Invention] According to the circuit breaker of the present invention, the abnormal current detection means and the semiconductor element are connected in series between the load terminal and the fixed contact, and a short circuit is prevented between the arc runner and the load terminal. The provision of a circuit has the effect of protecting abnormal current detection means with small heat capacity and semiconductor elements with small overcurrent resistance from large short-circuit currents.
第Ｆ図はこの発明の一実施例の断面図、第２図はその内
部回路図である。
１・・・負荷端子、２・・・電ｔＡ端子、３・・・固定
接点、４・・・可動接点、５・・・可動接触子、６・・
・アークホーン、７・・・アーク飛び移り部、８・・・
アークランナ、９・・・消弧装置、１０・・・駆動機構
、１ｌ・・・異常電流検出手段、１２・・・半導体素子
、ｌ３・・・短絡回路第
１
図
異電電，毘検出＋桟１１
１４
第
２
図
９
８
４
７
３
１３
手続補
正
書
（自の
平威
２年
２月
９日
平成
１年
特
許
順第３０６８０３号
２．
発明の名称
回路しゃ断器
３．
補正をする者
事件との関係FIG. F is a sectional view of one embodiment of the present invention, and FIG. 2 is an internal circuit diagram thereof. 1... Load terminal, 2... Electric tA terminal, 3... Fixed contact, 4... Movable contact, 5... Movable contact, 6...
・Arc horn, 7...Arc jump part, 8...
Arc runner, 9... Arc extinguishing device, 10... Drive mechanism, 1l... Abnormal current detection means, 12... Semiconductor element, l3... Short circuit Figure 1 Different electric current, Bi detection + crosspiece 11 14 2 Figure 9 8 4 7 3 13 Procedural amendment (Own February 9, 1999 Patent Order No. 306803 2. Title of invention Circuit breaker 3. Person making the amendment Relationship to the case)
Claims (1)
固定接点と、この固定接点に接離する可動接点を有する
可動接触子と、この可動接触子を駆動する駆動機構と、
前記固定接点と前記負荷端子との間に接続され所定の異
常電流を検出して前記駆動機構を動作させることにより
前記可動接触子を開極動作させる異常電流検出手段と、
前記電源端子側に接続されたアークホーンと、前記固定
接点に近接配置されたアーク飛び移り部を有するアーク
ランナと、前記アークホーンおよび前記アークランナの
間に設けられて前記固定接点と前記可動接点との間に発
生したアークを消弧する消弧装置と、前記固定接点と前
記負荷端子との間で前記異常電流検出手段に直列に接続
された半導体素子と、前記アークランナと前記負荷端子
を接続する短絡回路とを備えた回路しゃ断器。A load terminal and a power supply terminal, a fixed contact connected to the load terminal, a movable contact having a movable contact that contacts and separates from the fixed contact, and a drive mechanism that drives the movable contact.
abnormal current detection means connected between the fixed contact and the load terminal to detect a predetermined abnormal current and operate the drive mechanism to open the movable contact;
an arc horn connected to the power terminal side; an arc runner having an arc jump portion disposed close to the fixed contact; and an arc runner provided between the arc horn and the arc runner to connect the fixed contact and the movable contact. an arc extinguishing device for extinguishing an arc generated between the two, a semiconductor element connected in series to the abnormal current detection means between the fixed contact and the load terminal, and a short circuit connecting the arc runner and the load terminal. A circuit breaker with a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30680389A JPH03167729A (en) | 1989-11-27 | 1989-11-27 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30680389A JPH03167729A (en) | 1989-11-27 | 1989-11-27 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03167729A true JPH03167729A (en) | 1991-07-19 |
Family
ID=17961448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30680389A Pending JPH03167729A (en) | 1989-11-27 | 1989-11-27 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03167729A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08185784A (en) * | 1994-12-27 | 1996-07-16 | Nitto Kogyo Kk | Circuit breaker for wiring |
-
1989
- 1989-11-27 JP JP30680389A patent/JPH03167729A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08185784A (en) * | 1994-12-27 | 1996-07-16 | Nitto Kogyo Kk | Circuit breaker for wiring |
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