JP2927802B2 - Circuit breaker contact device - Google Patents
Circuit breaker contact deviceInfo
- Publication number
- JP2927802B2 JP2927802B2 JP63241957A JP24195788A JP2927802B2 JP 2927802 B2 JP2927802 B2 JP 2927802B2 JP 63241957 A JP63241957 A JP 63241957A JP 24195788 A JP24195788 A JP 24195788A JP 2927802 B2 JP2927802 B2 JP 2927802B2
- Authority
- JP
- Japan
- Prior art keywords
- fixed contact
- contact
- circuit breaker
- movable
- fixed
- 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
Description
この発明は、過電流引外し装置の作動により開離動作
をする第１の遮断部と、これに直列に接続され固定接触
子と可動接触子との間に働く電磁反発力により開離動作
をする第２の遮断部とを有する２点切り回路遮断器にお
ける接触子構造に関する。According to the present invention, the first breaking part which performs the separating operation by the operation of the overcurrent trip device, and the separating operation which is connected in series to the first breaking part by the electromagnetic repulsive force acting between the fixed contact and the movable contact. The present invention relates to a contact structure in a two-point breaker circuit breaker having a second breaker section.
この種の回路遮断器として、従来、第４図に示すもの
が知られている。第４図は投入状態の回路遮断器（配線
用しゃ断器）の縦断面図で、図示回路遮断器は、第１の
遮断部41と第２の遮断部42とを有している。ここで、第
１の遮断部41はケース43とカバー44とからなる絶縁箱45
内に納められ、固定接触子46と、これに接離可能な作動
接触子47とから構成されている。可動接触子47はケース
43に支持された開閉軸48に取り付けられ、過電流引外し
装置49に対向する引外しクロスバー50の爪50aに係合す
る開閉機構51によって図示投入位置に保持されている。
可動接触子47は可撓導体52により過電流引外し装置49に
接続されている。 一方、第２の遮断部42は、絶縁箱45の背面壁に取り付
けられた絶縁箱53に納められ、固定接触子46に可撓導体
54により直列に接続された固定接触子55とこれに接離す
る可動接触子56とから構成されている。可動接触子56は
軸57により支持され、閉成ばね58により固定接触子55に
平行な図示投入位置に保持されている。 このような構成において、電路に短絡電流のような大
電流が流れると、固定接触子55及び可動接触子56にそれ
ぞれ相反する方向に流れる電流間に発生する電磁反発力
により、閉成ばね58に打ち勝って第２の遮断部42が開離
し、次いで過電流引外し装置49の作動により開閉機構51
と爪50aとの係合が外れて第１の遮断部41が開離する。FIG. 4 shows a known circuit breaker of this type. FIG. 4 is a longitudinal sectional view of a circuit breaker (wiring breaker) in a closed state. The illustrated circuit breaker has a first breaker 41 and a second breaker 42. Here, the first blocking part 41 is an insulating box 45 composed of a case 43 and a cover 44.
It comprises a fixed contact 46 and an operating contact 47 that can be brought into and out of contact therewith. The movable contact 47 is a case
An open / close mechanism 51 is attached to an open / close shaft 48 supported by 43 and is engaged with a claw 50a of a trip crossbar 50 facing the overcurrent trip device 49, and is held at the loading position in the drawing.
The movable contact 47 is connected to an overcurrent trip device 49 by a flexible conductor 52. On the other hand, the second blocking portion 42 is housed in an insulating box 53 attached to the back wall of the insulating box 45, and the fixed contact 46 has a flexible conductor.
It is composed of a fixed contact 55 connected in series by 54 and a movable contact 56 that comes into contact with and separates from the fixed contact 55. The movable contact 56 is supported by a shaft 57 and is held by a closing spring 58 at a loading position shown in the drawing parallel to the fixed contact 55. In such a configuration, when a large current such as a short-circuit current flows in the electric circuit, an electromagnetic repulsion generated between currents flowing in opposite directions to the fixed contact 55 and the movable contact 56 respectively causes the closing spring 58 to The second breaking portion 42 is opened by overcoming, and the opening / closing mechanism 51 is operated by the operation of the overcurrent trip device 49.
And the claw 50a are disengaged, and the first blocking portion 41 is separated.
以上のような従来装置においては、第１の遮断部41及
び第２の遮断部42は、それぞれ別個の絶縁箱45及び53に
納められている。そのため、両遮断部間の電路が長くな
り、回路遮断器が大型化するという問題点があった。 この発明は、２点切り回路遮断器における電路を短縮
して回路遮断器を小型化できる回路遮断器の接触子装置
を提供することを目的とするものである。In the conventional device as described above, the first blocking part 41 and the second blocking part 42 are housed in separate insulating boxes 45 and 53, respectively. Therefore, there is a problem that the electric circuit between the two breaking units becomes long, and the circuit breaker becomes large. SUMMARY OF THE INVENTION An object of the present invention is to provide a contact device of a circuit breaker capable of reducing the size of the circuit breaker by shortening an electric circuit in the two-point circuit breaker.
上記目的を達成するために、この発明は、固定接触子
と可動接触子との間に働く電磁反発力と過電流引外し装
置の作動により開離動作をする第１の遮断部と、これに
直列に接続され固定接触子と可動接触子との間に働く電
磁反発力により開離動作をする第２の遮断部とを有する
回路遮断器において、真直ぐな帯状の平板導体からな
り、その両端の互いに反対側の面にそれぞれ固定接点が
取り付けられた固定接触子を第１及び第２の遮断部に兼
用に設け、この固定接触子の固定接点が取り付けられた
両側にそれぞれ固定接触子と相反する方向に電流が流れ
るように前記第１および第２の可動接触子を配置し、前
記第１及び第２の遮断部は大電流によって固定接触子と
第１及び第２の可動接触子との間に働く電磁反発力が同
一となるように、前記第１及び第２の可動接触子が前記
固定接触子の全長を大電流に基づく電磁反発力の対象長
さとして該固定接触子に重なり合うようにするものとす
る。In order to achieve the above object, the present invention provides a first shut-off unit which performs an opening operation by an electromagnetic repulsive force acting between a fixed contact and a movable contact and the operation of an overcurrent trip device, and A circuit breaker having a second breaking portion that is connected in series and performs a separating operation by an electromagnetic repulsion acting between a fixed contact and a movable contact, comprising a straight band-shaped flat plate conductor, Fixed contacts having fixed contacts attached to opposite surfaces are provided for both the first and second blocking portions, and the fixed contacts are opposed to the fixed contacts on both sides of the fixed contact where the fixed contacts are attached. The first and second movable contacts are arranged so that a current flows in a direction, and the first and second cut-off portions are disposed between the fixed contact and the first and second movable contacts by a large current. So that the electromagnetic repulsion acting on Shall first and second movable contact to overlap in the fixed contact as the target length of the electromagnetic repulsion force based the total length of the fixed contacts a large current.
この発明は第１の遮断部と第２の遮断部とで固定接触
子を兼用化するもので、兼用化された固定接触子の両側
に第１及び第２の遮断部の可動接触子を配置する。した
がって、固定接触子間を結ぶ可撓導体が不要となり電路
が著しく短くなる。また、上記固定接触子は真直ぐな帯
状の平板導体からなるので、その両側に配置された第１
及び第２の可動接触子との間で最大の電磁反発力が得ら
れるとともに、前記２つの可動接触子の間隔距離が狭ま
り遮断部が一層コンパクトになる。According to the present invention, a fixed contact is shared by the first and second blocking portions, and movable contacts of the first and second blocking portions are arranged on both sides of the fixed contact that is combined. I do. Therefore, a flexible conductor for connecting the fixed contacts is not required, and the electric circuit is significantly shortened. Further, since the fixed contact is made of a straight band-shaped flat conductor, the first contacts arranged on both sides thereof are fixed.
A maximum electromagnetic repulsion is obtained between the first movable contact and the second movable contact, and the distance between the two movable contacts is narrowed, so that the blocking portion is further compact.
第１図〜第３図はこの発明の実施例を示し、第１図は
回路遮断器の閉成状態の要部縦断面図、第２図は第１図
の回路遮断器の開離を完了した状態の要部縦断面図、第
３図は固定接触子の斜視図である。 図において、ケース１とカバー２とからなる絶縁箱３
に、第１の遮断部４と第２の遮断部５とが納められてい
る。６は第１及び第２の遮断部に兼用の固定接触子で真
直ぐな帯状の平板導体からなり、ケース１に固定されて
いる。そして、固定接触子６の図の左端上面に第１の遮
断部４の固定接点７が取り付けられ、また右端下面に第
２の遮断部５のための固定接点８が取り付けられてい
る。固定接点７には前方に延びるアークホーン９が設け
られている。 固定接触子６の図の上側には、第１の遮断部４の可動
接触子10が配置されている。この可動接触子10は固定接
点７に接離する固定接点11を備え、軸12により絶縁物の
ホルダ13に回動可能に支持されている。軸12には捩じり
ばねからなる接触ばね14が装着されており、可動接触子
10に図の反時計方向の力を与えている。ホルダ13はこれ
と一体形成された図示しない開閉軸によりケース１に回
動可能に支持されている。また、可動接触子10の尾部は
可撓導体15により一部分を図示した過電流引外し装置16
に接続されている。 固定接触子６の図の下側には、第２の遮断部５の可動
接触子17が配置されている。可動接触子17は固定接点８
に接離する可動接点18を備え、軸19によりケース１に回
動可能に支持されている。可動接触子17の尾部とケース
１との間には閉成ばね20が挿入され、この閉成ばね20に
より可動接触子17には常時図の反時計方向の力が与えら
れている。また、可動接触子17の尾部は、可撓導体21に
より外部接続端子22に接続されている。23及び24はそれ
ぞれ第１及び第２の遮断部の消弧室である。 このように、第１の遮断部４と第２の遮断部５とで固
定接触子６を兼用することにより、この固定接触子６を
通して両方の遮断部4,5がコンパクトに一体化され、一
つの絶縁箱３に収容可能となる。 さて、第１図の閉成状態において、固定接触子６及び
可動接触子10,17には、隣接する接触子間で相反する方
向の電流が矢印で示すように流れている。そこで、電路
に短絡電流のような大電流が流れると、上記各接触子を
流れる電流間の電磁反発力により、第１及び第２の遮断
部は開離を開始する。それに引き続き、過電流引外し装
置16が動作し、開閉機構25のラッチ25aと図示しない爪
との係合が外れると、トグルリンク25bに対する開閉ば
ね26の力が反転し、第２図に示すように開離が行われ
る。1 to 3 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a main part of a circuit breaker in a closed state, and FIG. 2 is a diagram showing completion of opening of the circuit breaker of FIG. FIG. 3 is a perspective view of the fixed contactor in a longitudinal sectional view of a main part in a state where the contact is made. In the figure, an insulating box 3 composed of a case 1 and a cover 2
In the figure, a first blocking part 4 and a second blocking part 5 are housed. Reference numeral 6 denotes a straight band-shaped flat conductor, which is a fixed contact that is also used for the first and second blocking portions, and is fixed to the case 1. The fixed contact 7 of the first breaking part 4 is attached to the upper surface of the left end of the fixed contact 6 in the drawing, and the fixed contact 8 for the second breaking part 5 is mounted to the lower surface of the right end. The fixed contact 7 is provided with an arc horn 9 extending forward. On the upper side of the fixed contact 6 in the drawing, the movable contact 10 of the first blocking unit 4 is arranged. The movable contact 10 includes a fixed contact 11 that comes into contact with and separates from the fixed contact 7, and is rotatably supported by a shaft 13 on an insulator holder 13. A contact spring 14 composed of a torsion spring is mounted on the shaft 12, and the movable contact
10 is given a counterclockwise force as shown. The holder 13 is rotatably supported by the case 1 by an opening / closing shaft (not shown) integrally formed therewith. Further, the tail of the movable contact 10 is over-current tripping device 16 partially shown by a flexible conductor 15.
It is connected to the. A movable contact 17 of the second blocking unit 5 is disposed below the fixed contact 6 in the drawing. The movable contact 17 is a fixed contact 8
A movable contact 18 is provided on the case 1 so as to be rotatable by a shaft 19. A closing spring 20 is inserted between the tail of the movable contact 17 and the case 1, and the closing spring 20 constantly applies a counterclockwise force to the movable contact 17 in the figure. The tail of the movable contact 17 is connected to an external connection terminal 22 by a flexible conductor 21. Reference numerals 23 and 24 denote arc-extinguishing chambers of the first and second blocking portions, respectively. In this way, by using the fixed contact 6 also as the first blocking part 4 and the second blocking part 5, both the blocking parts 4, 5 are compactly integrated through the fixed contact 6. Can be accommodated in one insulating box 3. In the closed state shown in FIG. 1, currents flowing in opposite directions between adjacent contacts flow through the fixed contact 6 and the movable contacts 10 and 17 as shown by arrows. Then, when a large current such as a short-circuit current flows in the electric circuit, the first and second breaking portions start to be separated by the electromagnetic repulsion between the currents flowing through the contacts. Subsequently, when the overcurrent tripping device 16 is operated and the latch 25a of the opening / closing mechanism 25 is disengaged from the not-shown claw, the force of the opening / closing spring 26 on the toggle link 25b is reversed, as shown in FIG. Separation is carried out.
この発明によれば、第１の遮断部と第２の遮断部とで
固定接触子を兼用化し、固定接触子間を結ぶ可撓導体を
不要とすることにより両遮断部間の電路が著しく短くな
り、２点切りの回路遮断器を極めて小型に構成すること
ができる。また、上記固定接触子を真直ぐな帯状の平板
導体で構成することにより、その両側に配置した第１及
び第２の可動接触子との間で最大の電磁反発力を生じさ
せることができるとともに、前記２つの可動接触子の間
隔距離を狭めて回路遮断器をより小型化することができ
る。しかも、固定接触子と第１及び第２の可動接触子と
の間に働く電磁反発力が同一となるように、第１及び第
２の可動接触子を固定接触子の全長を大電流に基づく電
磁反発力の対象長さとして該固定接触子と重なり合うよ
うにしたので、第１の遮断部および第２の遮断部に同一
の電磁反発力を与えるための構成が簡単となる。According to the present invention, the fixed contact is also used as the first cut-off portion and the second cut-off portion, and the need for a flexible conductor connecting the fixed contacts is eliminated, so that the electric path between both cut-off portions is significantly shortened. Thus, the two-point circuit breaker can be configured to be extremely small. Further, by configuring the fixed contact with a straight strip-shaped flat conductor, it is possible to generate the maximum electromagnetic repulsion between the first and second movable contacts arranged on both sides thereof, The distance between the two movable contacts can be reduced to further reduce the size of the circuit breaker. In addition, the first and second movable contacts are formed based on a large current so that the electromagnetic repulsion acting between the fixed contact and the first and second movable contacts is the same. Since the target length of the electromagnetic repulsion is set so as to overlap the fixed contact, the configuration for applying the same electromagnetic repulsion to the first and second interrupting portions is simplified.
第１図はこの発明の実施例を示す回路遮断器の閉成状態
の要部縦断面図、第２図は第１図の回路遮断器が開離を
完了した状態の要部縦断面図、第３図は第１図の回路遮
断器における固定接触子の拡大斜視図、第４図は従来例
を示す回路遮断器の縦断面図である。４……第１の遮断
部、５……第２の遮断部、６……固定接触子、10……第
１の遮断部の可動接触子、16……過電流引外し装置、17
……第２の遮断部の可動接触子。FIG. 1 is a vertical sectional view of a main part of a closed state of a circuit breaker showing an embodiment of the present invention, FIG. 2 is a vertical sectional view of a main part of a state where the circuit breaker of FIG. FIG. 3 is an enlarged perspective view of a fixed contact in the circuit breaker of FIG. 1, and FIG. 4 is a longitudinal sectional view of a circuit breaker showing a conventional example. 4 first interrupting section, 5 second interrupting section, 6 fixed contact, 10 movable contact of first interrupting section, 16 overcurrent trip device, 17
... A movable contact of the second blocking portion.
Claims (1)
反発力と過電流引外し装置の作動により開離動作をする
第１の遮断部と、これに直列に接続され固定接触子と可
動接触子との間に働く電磁反発力により開離動作をする
第２の遮断部とを有する回路遮断器において、真直ぐな
帯状の平板導体からなり、その両端の互いに反対側の面
にそれぞれ固定接点が取り付けられた固定接触子を前記
第１及び第２の遮断部に兼用に設け、この固定接触子の
固定接点が取り付けられた両側にそれぞれ固定接触子と
相反する方向に電流が流れるように前記第１および第２
の可動接触子を配置し、前記第１及び第２の遮断部は大
電流によって固定接触子と第１及び第２の可動接触子と
の間に働く電磁反発力が同一となるように、前記第１及
び第２の可動接触子が前記固定接触子の全長を大電流に
基づく電磁反発力の対象長さとして該固定接触子に重な
り合うことを特徴とする回路遮断器の接触子装置。1. A first breaking part which is opened by an electromagnetic repulsive force acting between a fixed contact and a movable contact and an overcurrent trip device, and a fixed contact connected in series to the first breaking part. A circuit breaker having a second breaking portion that performs an opening operation by an electromagnetic repulsive force acting between the movable contact and the movable contact, comprising a straight band-shaped flat plate conductor, and having opposite ends at opposite ends thereof. A fixed contact to which a fixed contact is attached is also provided for the first and second breaking portions, and current flows in opposite directions to the fixed contact on both sides of the fixed contact where the fixed contact is attached. The first and second
The first and second breaking parts are arranged so that the electromagnetic repulsive force acting between the fixed contact and the first and second movable contacts by a large current becomes the same. A contact device for a circuit breaker, wherein the first and second movable contacts overlap the fixed contact with the total length of the fixed contact as a target length of an electromagnetic repulsion force based on a large current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63241957A JP2927802B2 (en) | 1988-09-27 | 1988-09-27 | Circuit breaker contact device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63241957A JP2927802B2 (en) | 1988-09-27 | 1988-09-27 | Circuit breaker contact device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0290437A JPH0290437A (en) | 1990-03-29 |
| JP2927802B2 true JP2927802B2 (en) | 1999-07-28 |
Family
ID=17082091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63241957A Expired - Lifetime JP2927802B2 (en) | 1988-09-27 | 1988-09-27 | Circuit breaker contact device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2927802B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10236145B1 (en) * | 2017-11-22 | 2019-03-19 | Carling Technologies, Inc. | High voltage DC circuit breaker with double break contacts |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431884Y2 (en) * | 1975-02-13 | 1979-10-04 |
-
1988
- 1988-09-27 JP JP63241957A patent/JP2927802B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0290437A (en) | 1990-03-29 |
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