JPH01281634A - Overcurrent taking-off device of circuit breaker - Google Patents
Overcurrent taking-off device of circuit breakerInfo
- Publication number
- JPH01281634A JPH01281634A JP11178088A JP11178088A JPH01281634A JP H01281634 A JPH01281634 A JP H01281634A JP 11178088 A JP11178088 A JP 11178088A JP 11178088 A JP11178088 A JP 11178088A JP H01281634 A JPH01281634 A JP H01281634A
- Authority
- JP
- Japan
- Prior art keywords
- piece
- taking
- tripping
- overcurrent
- overheat
- 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 12
- 230000005284 excitation Effects 0.000 claims description 15
- 239000004020 conductor Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 230000020169 heat generation Effects 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 2
- 210000000078 claw Anatomy 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract 3
- 238000013021 overheating Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005476 soldering Methods 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〕
この発明は一般的に小形から中形の回路遮断器に用いら
れるオイルダッシュポット形過電流引外し装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention generally relates to an oil dashpot type overcurrent trip device used in small to medium sized circuit breakers.
この種の過電流引外し装置としてはたとえば第３図およ
び第４図に示すものが知られている０図においてこの回
路遮断器は３掻形で、上下方向に分割される合成樹脂に
よるケース１およびカバー２内にはケース１の基台ｌａ
上に電源側端子３が延長され固定接点４が固着された固
定接触子５と、固定接点４と接離可能な可動接点６が一
端に固着され他端に可撓導体７が接続された可動接触子
８と、可撓導体７の他端にねじ９により接続され過電流
引外し装置 ３０に巻装された励磁コイル２１と、励磁
コイル２１ の他端に接続された負荷側端子ｌＯとでな
る主電路構成部が配設されている。As this type of overcurrent tripping device, for example, the one shown in Fig. 3 and Fig. 4 is known. And inside the cover 2 is the base la of the case 1.
There is a fixed contact 5 on which the power supply side terminal 3 is extended and a fixed contact 4 fixed to it, and a movable contact 6 which is fixed at one end and has a flexible conductor 7 connected to the other end. The contactor 8, the excitation coil 21 connected to the other end of the flexible conductor 7 by a screw 9 and wound around the overcurrent tripping device 30, and the load side terminal lO connected to the other end of the excitation coil 21. A main electric circuit component is provided.
そしてこれらの主電路構成部の上方側には固定接点４と
可動接点６との接触部を覆う消弧室１１ と、３橿の可
動接触子８を接触ばね１２を介して一括支持し、回動自
在に支承されるとともに開閉ばねｌ３により付勢された
クロスバー１４ と、クロスバー１４に係合し固定接点
４と可動接点６との接離を司る開閉機構１５が設けられ
ている。一方過電流引外し装置３０は前述の励磁コイル
２１が巻枠２２を介して巻装され、Ｌ字の継鉄２３の一
側脚片２３ａに貫通固着されたオイルダッシュポット２
４ と、継鉄２３の他側脚片２３ｂの端部に１１１１３
自在に支承されほぼ直角に折曲げ延長された引外しレバ
ー２５ａを有し、オイルダッシュポット２４の接極子２
４ａに吸引される可動鉄心２５ と、引外しレバー２５
ａと継鉄の他側脚片２３ｂとの間に張架された復帰ばね
２６ とで構成されている。開閉機構１５ と過電流引
外し装置３０ との間にはケースｌに揺動自在に支承さ
れ、種間を貫通して各種の引外しレバー２５ａと係合可
能にして開閉機構１５の係止爪１５ａと孫合し、可動接
点６の固定接点４との閉成状態を保持して可動鉄心２５
の吸引時に開離動作させる引外しクロスバー２７が設け
られている。なお励磁コイル２１ は本体に組込まれる
前にその両端に負荷側端子１０および接続片１６が半田
付けされてユニット化され、種々の定格電流の仕様に対
して即応できる構造になっている。接続片１６ と可撓
導体７との接続は、可撓導体７に半田付けされたリード
板１７をねじ９により継鉄２３のケース１への固定と共
線されるようになっている。また過電流引外し装置３０
と負荷端子ｌＯとの間の仕切り板１８はケースｌへの
カバー２の取付けにより負荷側端子１０ とともに固定
されるようになっている。Above these main circuit components, there is an arc extinguishing chamber 11 that covers the contact area between the fixed contact 4 and the movable contact 6, and a movable contact 8 of three rods is collectively supported via a contact spring 12, and the rotating A cross bar 14 is movably supported and biased by an opening/closing spring l3, and an opening/closing mechanism 15 that engages with the cross bar 14 and controls the contact and separation of the fixed contact 4 and the movable contact 6 are provided. On the other hand, the overcurrent tripping device 30 has an oil dashpot 2 in which the above-mentioned excitation coil 21 is wound through a winding frame 22 and fixed to one side leg piece 23a of an L-shaped yoke 23.
4 and 11113 at the end of the other leg piece 23b of the yoke 23.
The armature 2 of the oil dashpot 24 has a tripping lever 25a that is freely supported and bent and extended at a substantially right angle.
The movable iron core 25 that is attracted to 4a and the tripping lever 25
a and a return spring 26 stretched between the other leg piece 23b of the yoke. A locking claw of the opening/closing mechanism 15 is supported between the opening/closing mechanism 15 and the overcurrent tripping device 30 so as to be able to swing freely in the case l, and is made to penetrate through the gap and engage with various tripping levers 25a. 15a, and maintains the closed state of the movable contact 6 with the fixed contact 4, and the movable iron core 25
A tripping cross bar 27 is provided which is operated to open and separate when the suction is performed. The excitation coil 21 is assembled into a unit by soldering the load side terminals 10 and the connecting pieces 16 to both ends thereof before being incorporated into the main body, and has a structure that can be readily adapted to various rated current specifications. The connection between the connecting piece 16 and the flexible conductor 7 is made in parallel with the fixation of the lead plate 17 soldered to the flexible conductor 7 to the case 1 of the yoke 23 with the screw 9. In addition, the overcurrent tripping device 30
The partition plate 18 between the load terminal 10 and the load terminal 10 is fixed together with the load terminal 10 by attaching the cover 2 to the case l.
以上の構成において、励磁コイル２１の電路電流が過電
流になり、オイルダッシュポンド２４が強励磁されて可
動鉄心２５が接極子２４ａに吸引されると、引外しレバ
ー２５ａが引外しクロスバー２７を反時計方向に回動し
て係止爪１５ａとの係合を外し開閉機構１５を引外し動
作すなわち可動接点６を固定接点４から開離させる。In the above configuration, when the circuit current of the excitation coil 21 becomes an overcurrent and the oil dash pond 24 is strongly excited and the movable iron core 25 is attracted to the armature 24a, the tripping lever 25a trips and the crossbar 27 is pulled out. It rotates counterclockwise to disengage the locking pawl 15a and trip the opening/closing mechanism 15, that is, to separate the movable contact 6 from the fixed contact 4.
（発明が解決しようとする課題）
このような従来装置においては、たとえば負荷端子１０
に接続された図示されていない外部導体が変形や腐蝕な
どで接触状態が悪い場合や、端子ねじ１０ａおよびねじ
９の締付力が不足しているような場合に、これら接続部
が異常に発熱し、その熱が励磁コイル２１および継鉄２
３を介してケース１を焼損するようなことがあっても、
過電流にならない限りこの過電流引外し装置２０は引外
し動作しないという問題点があった。(Problem to be Solved by the Invention) In such a conventional device, for example, the load terminal 10
If the contact condition of the external conductor (not shown) connected to the The heat is transferred to the exciting coil 21 and the yoke 2.
Even if case 1 were to be burnt out through 3,
There is a problem in that the overcurrent tripping device 20 does not perform a tripping operation unless an overcurrent occurs.
この発明の目的は前述した従来の欠点を除去し、過電流
にならなくても異常発熱を捉えて引外し動作する回路遮
断器の過電流引外し装置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks and provide an overcurrent tripping device for a circuit breaker that can detect abnormal heat generation and trip the circuit breaker even if an overcurrent does not occur.
この発明は前述の目的を達成するために、回路遮断器の
可動接触子に接続された可撓導体と負両側端子との間に
挿入接続され電路電流が流れる励磁コイルと、咳励磁コ
イルが巻枠を介して巻装されるＬ字状の継鉄の一例脚片
に貫通固着され接触子を有するオイルダッシュポットと
、前記継鉄の他側脚片端に）２動自在に支承され前記可
動接触子の開閉機構と係合する引外し機構と係合可能な
引外しレバーを有し、前記励磁コイルの電流が過大にな
ると前記接極子に吸引されて前記引外し機構の係合を外
す可動鉄心とを備えた過を流用外し装置において、前記
継鉄の他側脚片に一端が固着され電路電流通電部の異常
発熱を捉えて他端が前記引外し機構と係合して開閉機構
を動作させるバイメタルによる過熱引外し片とを設けた
ことである。In order to achieve the above-mentioned object, this invention has an excitation coil inserted and connected between a flexible conductor connected to a movable contact of a circuit breaker and negative side terminals, through which a current flows, and a cough excitation coil wound around the excitation coil. An example of an L-shaped yoke that is wound through a frame; an oil dashpot that is fixed through the leg piece and has a contact; and the movable contact that is movably supported at one end of the other leg of the yoke. A movable iron core has a tripping lever that can be engaged with a tripping mechanism that engages with a child opening/closing mechanism, and when the current of the excitation coil becomes excessive, it is attracted to the armature and disengages the tripping mechanism. In the fault diversion/removal device, one end is fixed to the other leg of the yoke, and the other end engages with the tripping mechanism to operate the opening/closing mechanism by detecting abnormal heat generation in the current-carrying part of the electric circuit. The reason is that a bimetal overheat tripping piece is provided to prevent overheating.
〔作用）
この発明による過電流引外し装置においては、継鉄に継
鉄の異常発熱を捉えて引外しクロスバ−の開閉機構との
係合を外すバイメタルによる過熱引外し片を設けたこと
により、ｉ１！電流によらない異常発熱による焼ｔｉが
防止される。[Function] In the overcurrent tripping device according to the present invention, a bimetallic overheat tripping piece is provided on the yoke to catch abnormal heat generation of the yoke and disconnect the tripping crossbar from the opening/closing mechanism. i1! Burnout due to abnormal heat generation not caused by current is prevented.
第１図および第２図はこの発明による回路遮断器の過電
流引外し装置の一実施例を示す図で、第１図は回路遮断
器に設置された状態を示す側面図、第２図は斜視図であ
る０図において前述した第３図の従来装置と同一部分に
は同一符号を付すことにより対応させ相違点について説
明する。この実施例において従来装置と相違する点は、
継鉄２３の他側脚片２３ｂの外側面に一端が固着され、
他端が変形温度に達すると引外しクロスバー２７に係合
し、可動鉄心２５の吸引動作による引外しレバー２５ａ
による係合と同様に回動させるバイメタルによる過熱用
外し片２８を設けたことである。なお過熱用外し片２８
の一端と継鉄２３の他側脚片２３ｂとの固着は２本のリ
ベット２９のかしめによってなされている。1 and 2 are diagrams showing an embodiment of the overcurrent tripping device for a circuit breaker according to the present invention, FIG. 1 is a side view showing the state installed in the circuit breaker, and FIG. In FIG. 0, which is a perspective view, the same parts as those of the conventional device shown in FIG. The difference between this embodiment and the conventional device is as follows:
One end is fixed to the outer surface of the other leg piece 23b of the yoke 23,
When the other end reaches the deformation temperature, it engages with the tripping crossbar 27, and the tripping lever 25a is pulled out by the suction action of the movable iron core 25.
This is because a bimetallic overheating release piece 28 is provided, which is rotated in the same manner as the engagement. In addition, overheating removal piece 28
One end of the yoke 23 is fixed to the other leg piece 23b by caulking two rivets 29.
以上の構成において、たとえば前述した第３図の従来装
置の場合と同様に、負荷側端子ｌＯおよびリード板１７
や接続片１６ との接続箇所で異常発熱し、その熱が励
磁コイル２１を介して継鉄２３に伝わり、その温度が過
熱用外し片２８の素材であるバイメタルの変形温度に達
すると、過熱用外し片２８が湾曲して引外しクロスバー
２６を反時計方向に回動させ、開閉機構１５の係止爪１
５ａとの係合を外して開閉機構１５を引外し動作させて
電路が遮断される。したがってこのことによりオイルダ
ッシェポット形過電流引外し装置そのものの機能を損ね
ることなく、またそれだけでは保護できない異常発熱に
よる焼ＩＭ防止が可能になる。In the above configuration, for example, as in the case of the conventional device shown in FIG.
Abnormal heat is generated at the connection point with the connecting piece 16 and the excitation coil 21, and the heat is transmitted to the yoke 23 through the excitation coil 21. When the temperature reaches the deformation temperature of the bimetal, which is the material of the overheating removal piece 28, the overheating The removal piece 28 curves and rotates the removal crossbar 26 counterclockwise, thereby locking the locking claw 1 of the opening/closing mechanism 15.
The electric circuit is cut off by disengaging the opening/closing mechanism 15 and tripping the opening/closing mechanism 15. Therefore, this makes it possible to prevent IM burnout due to abnormal heat generation, which cannot be protected by this alone, without impairing the function of the oil dashpot type overcurrent tripping device itself.
この発明によれば継鉄に許容温度上昇を超えると湾曲し
て引外しクロスバ−を引外し動作させるバイメタルによ
る過熱用外し片を設け、過電流に起因しない異常過熱を
含めて動作を可能にしたことにより、信頼性がより向上
した回路遮断器の過電流用外し装置を提供することがで
きる。According to this invention, the yoke is provided with a bimetallic overheating release piece that bends and trips the crossbar when the allowable temperature rise is exceeded, making it possible to operate the yoke even in cases of abnormal overheating that is not caused by overcurrent. As a result, it is possible to provide a circuit breaker overcurrent disconnection device with improved reliability.
第１図および第２図はこの発明に回路遮断器の過電流用
外し装置の一実施例を示す図で、第１図は回路遮断器に
設置された状態を示す側面図、第２図は斜視図、第３図
および第４図は従来の回路遮断器の過電流用外し装置の
一例を示す図で、第３図は回路遮断器に設置された状態
を示す側面図、第４図は斜視図である。
７・・・接続導体、８・・・可動接触子、ｌＯ・・・負
淘側端子、１５・・・開閉機構、２１・・・励磁コイル
、２３・・・継鉄、２３ａ・・・−側脚片、２３ｂ・・
・他側脚片、２４・・・オイルダッシュボット、２５・
・・可動鉄心、２５ａ・・・引外しレバー、２７・・・
引外しクロスバ−１２８・・・過熱用外し片。
２５α５１外しレバ・−
ぢ ２ 閉1 and 2 are diagrams showing an embodiment of the overcurrent release device for a circuit breaker according to the present invention, FIG. 1 is a side view showing the state installed in the circuit breaker, and FIG. A perspective view, FIG. 3, and FIG. 4 are views showing an example of a conventional overcurrent release device for a circuit breaker. FIG. 3 is a side view showing a state installed in a circuit breaker, and FIG. FIG. 7... Connection conductor, 8... Movable contact, lO... Negative side terminal, 15... Opening/closing mechanism, 21... Excitation coil, 23... Yoke, 23a...- Side leg piece, 23b...
・Other side leg piece, 24...Oil Dashbot, 25・
...Movable iron core, 25a...Trip lever, 27...
Tripping crossbar 128...Removal piece for overheating. 25α51 release lever - 2 Close
Claims (1)
荷側端子との間に挿入接続され電路電流が流れる励磁コ
イルと、該励磁コイルが巻枠を介して巻装されるＬ字状
の継鉄の一側脚片に貫通固着され接触子を有するオイル
ダッシュポットと、前記継鉄の他側脚片端に揺動自在に
支承され前記可動接触子の開閉機構と係合する引外し機
構と係合可能な引外しレバーを有し、前記励磁コイルの
電流が過大になると前記接極子に吸引されて前記引外し
機構の係合を外す可動鉄心とを備えた過電流引外し装置
において、前記継鉄の他側脚片に一端が固着され電路電
流通電部の異常発熱を捉えて他端が前記引外し機構と係
合して開閉機構を動作させるバイメタルによる過熱引外
し片とを設けたことを特徴とする回路遮断器の過電流引
外し装置。1) An excitation coil inserted and connected between a flexible conductor connected to a movable contact of a circuit breaker and a load side terminal, through which a circuit current flows, and an L-shape in which the excitation coil is wound through a winding frame. an oil dashpot having a contact that is penetrated and fixed to one leg of the shaped yoke; and a tripping that is swingably supported at one end of the other leg of the yoke and engages with the opening/closing mechanism of the movable contact. In an overcurrent tripping device, the overcurrent tripping device includes a tripping lever that can be engaged with a mechanism, and a movable iron core that is attracted to the armature and disengages the tripping mechanism when the current of the excitation coil becomes excessive. , a bimetallic overheat tripping piece is provided, one end of which is fixed to the other leg of the yoke, and whose other end engages with the tripping mechanism to operate the opening/closing mechanism by detecting abnormal heat generation in the current-carrying part of the electric circuit. An overcurrent tripping device for a circuit breaker, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11178088A JPH01281634A (en) | 1988-05-09 | 1988-05-09 | Overcurrent taking-off device of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11178088A JPH01281634A (en) | 1988-05-09 | 1988-05-09 | Overcurrent taking-off device of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01281634A true JPH01281634A (en) | 1989-11-13 |
Family
ID=14569977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11178088A Pending JPH01281634A (en) | 1988-05-09 | 1988-05-09 | Overcurrent taking-off device of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01281634A (en) |
-
1988
- 1988-05-09 JP JP11178088A patent/JPH01281634A/en active Pending
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