JPH03102735A - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- JPH03102735A JPH03102735A JP24135589A JP24135589A JPH03102735A JP H03102735 A JPH03102735 A JP H03102735A JP 24135589 A JP24135589 A JP 24135589A JP 24135589 A JP24135589 A JP 24135589A JP H03102735 A JPH03102735 A JP H03102735A
- Authority
- JP
- Japan
- Prior art keywords
- arc
- extinguishing
- arc extinguishing
- contact
- 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.)
- Pending
Links
Landscapes
- Breakers (AREA)
Abstract
Description
［産業上の利用分野］
この発明は２点切り回路遮断器に関するものである。
［従来の技術１
第６図は例えば特公昭５７−４５００７号公報に示され
た従来の２点切り回路遮断器の開閉部分の斜視図である
（筐体、機構部は図示せず）。第６図において、（１）
は第１の固定接触子、（２）は第１の固定接触子（１）
の一端に固着された第１の固定接点、（３）は第１の固
定接点（２）と接離する第ｌの可動接点、（４）は第１
の可動接点（３）を一端に固着した第１の可動接触子、
（５）は第１の可動接触子（４）と並置される第２の可
動接触子、（６）は両可動接触子（４）．（５）を連結
する連結部、（７）は第２の可動接触子（５）の先端に
固着された第２の可動接点、（８）は第２の可動接点（
７）と接離する第２の固定接点、（９）は第２の固定接
点（８）を一端に固着した第２の固定接触子、（１０）
は第１、第２の可動接触子（４）．（５）を支持する回
転軸である。また図示していないが、第１、第２の可動
接触子（４），（５）は各可動接点（３）．（７）と第
１、第２の固定接触子（１）．（９）の各固定接点（２
）．（８）との間に必要な接触圧力が得られるように回
転軸（１０）を中心としたモーメントがかけられている
．
第６図に示す開閉部は実際には第７図に示すような絶縁
物で構成された筐体内に設置される．第７図において、
（ｌ１）は筐体ベース、（ｌ２）は第１のアーク消弧空
間、（ｌ３）は第２のアーク消弧空間、（１４）は第１
、第２の消弧空間（１２）．（１３）を隔てる隔壁、（
１５）は両可動接触子（４）．（５）にそれぞれ回転モ
ーメントを与えるバネである。一般に、回路遮断器は３
相用のため第７図の構造のものが、三つ横に並んで、一
つの筐体内に納まっている。
第７図に示すアーク消弧空間（１２）．（１３）には、
遮断性能を確保するために複数枚の消弧板からなる消弧
装置が必要である。複数枚の消弧板からなる消弧装置と
しては、例えば実開昭６２− １ ５７５０号公報に示
されたものがある。第８図および第９図にこの消弧装置
を示す。第８図および第９図において、（１６）は消弧
板、（１６ａ），（１６ｂ）は消弧板（１６）のカシメ
用突起、（ｌ７）は消弧板（１６）を保持する保持板で
ある。
第１０図および第１１図に、第７図の開閉部の消弧空間
（１２）．（１３）に第８図および第９図の消弧装置を
設置した状態を示す。
次に動作について説明する。通常、電流は第１の固定接
触子（１）、第１の可動接触子（４）、連結部（６）、
第２の可動接触子（５）、第２の固定接触子（９）の順
に流れている。こうした閉状態から機構部（図示せず）
によって、第１、第２の可動接触子（４）．（５）が回
転軸（１ ０）を中心として時計方向へ回動すると、両
接点（２）と（３）、および（７）と（８）が開離し、
各々の接点間にアークが発生する．これらの二つのアー
クは隔壁（ｌ４）によって隔てられているため、電気的
に直列であり、一つのアークに較べてアーク柱の長さは
２倍であり、この構成の開閉部ではアーク電圧を２倍の
速さで高めることができる。さらに、接点間のアークは
消弧板（１６）に吸引されて冷却され、消弧される。こ
の結果、電流は速やかに抑制され、遮断時間も短く、遮
断器の損傷も低減できる。[Industrial Field of Application] This invention relates to a two-point circuit breaker. [Prior Art 1] Fig. 6 is a perspective view of the opening/closing portion of a conventional two-point circuit breaker disclosed in, for example, Japanese Patent Publication No. 57-45007 (the housing and mechanism are not shown). In Figure 6, (1)
is the first fixed contact, (2) is the first fixed contact (1)
A first fixed contact fixed to one end, (3) a l-th movable contact that comes into contact with and separates from the first fixed contact (2), and (4) a first
a first movable contact having a movable contact (3) fixed to one end;
(5) is a second movable contact juxtaposed with the first movable contact (4); (6) is both movable contacts (4). (5), (7) is the second movable contact fixed to the tip of the second movable contact (5), (8) is the second movable contact (
(7) is a second fixed contact that comes into contact with and separates from, (9) is a second fixed contact that has the second fixed contact (8) fixed to one end, (10)
are the first and second movable contacts (4). (5) It is a rotating shaft that supports. Although not shown, the first and second movable contacts (4), (5) are each movable contact (3). (7) and the first and second fixed contacts (1). (9) Each fixed contact (2
). A moment is applied around the rotating shaft (10) to obtain the necessary contact pressure between the shaft and the shaft (8). The opening/closing part shown in Figure 6 is actually installed inside a casing made of insulating material as shown in Figure 7. In Figure 7,
(l1) is the housing base, (l2) is the first arc extinguishing space, (l3) is the second arc extinguishing space, (14) is the first
, second arc-extinguishing space (12). The partition wall separating (13), (
15) are both movable contacts (4). (5) is a spring that applies rotational moment to each. Generally, circuit breakers are 3
For mutual use, three of the structures shown in Figure 7 are housed side by side in one housing. Arc extinguishing space (12) shown in Figure 7. In (13),
An arc extinguishing device consisting of multiple arc extinguishing plates is required to ensure interrupting performance. An example of an arc extinguishing device comprising a plurality of arc extinguishing plates is disclosed in Japanese Utility Model Application No. 15750/1983. This arc extinguishing device is shown in FIGS. 8 and 9. In Figures 8 and 9, (16) is an arc-extinguishing plate, (16a) and (16b) are protrusions for caulking the arc-extinguishing plate (16), and (l7) is a holder that holds the arc-extinguishing plate (16). It is a board. 10 and 11 show the arc extinguishing space (12) of the opening/closing part of FIG. 7. (13) shows the arc extinguishing device shown in FIGS. 8 and 9 installed. Next, the operation will be explained. Usually, the current flows through the first fixed contact (1), the first movable contact (4), the connecting part (6),
It flows in the order of the second movable contact (5) and the second fixed contact (9). From this closed state, the mechanism (not shown)
The first and second movable contacts (4). When (5) rotates clockwise around the rotation axis (10), both contacts (2) and (3) and (7) and (8) open,
An arc occurs between each contact point. These two arcs are separated by a partition wall (l4), so they are electrically in series, and the length of the arc column is twice that of a single arc. It can be increased twice as fast. Further, the arc between the contacts is attracted to the arc extinguishing plate (16), cooled, and extinguished. As a result, the current can be quickly suppressed, the interruption time can be shortened, and damage to the circuit breaker can be reduced.
従来の２点切り回路遮断器は以上のように構成されてい
るので、一相当９２個の消弧装置、三相用遮断器では計
６個の消弧装置が必要である．従って、筐体に消弧装置
を組み込むのに一点切り遮断器の２倍の手間がかかる。
また一相のスペースに２個の消弧装置を設置しなければ
ならないため、消弧板（ｌ６）のボリュームを大きくで
きず、遮断時における消弧板（ｌ６）の損傷が大きく遮
断器の寿命が小さいという問題点があった。
この発明は上記のような問題点を解消するためになされ
たもので、消弧装置の組み込みの手間を半減し、かつ消
弧板のボリュームを大きくでき寿命の長い回路遮断器を
得ることを目的とする。
〔課題を解決するための手段］
この発明に係る回路遮断器は、隔壁の両側の複数枚の消
弧板からなる消弧装置を、隔壁と一体である保持板とこ
の保持板に保持された消弧板とで構成することにより、
隔壁と２個の消弧装置を一体にしたものである。Since the conventional two-point circuit breaker is constructed as described above, 92 arc extinguishing devices are required per unit, and a total of 6 arc extinguishing devices are required for a three-phase circuit breaker. Therefore, it takes twice as much time and effort to incorporate the arc extinguisher into the casing as compared to a single-break circuit breaker. In addition, since two arc extinguishing devices must be installed in one phase space, the volume of the arc extinguishing plate (l6) cannot be increased, and the arc extinguishing plate (l6) is seriously damaged when the circuit is shut off, thus extending the life of the circuit breaker. The problem was that it was small. This invention was made to solve the above-mentioned problems, and aims to provide a circuit breaker with a long life by halving the effort required to assemble an arc extinguishing device, and increasing the volume of the arc extinguishing plate. shall be. [Means for Solving the Problems] A circuit breaker according to the present invention includes an arc extinguishing device consisting of a plurality of arc extinguishing plates on both sides of a partition wall, and a retaining plate that is integral with the partition wall and is held by the retaining plate. By composing with an arc-extinguishing plate,
It integrates a partition wall and two arc extinguishers.
この発明においては、隔壁と二つ分の消弧装置が一体で
あるため、筐体に消弧装置を組み込むとき、一相当り一
回の手間しかかからない。また消弧板の保持板が隔壁と
一体であるため、隔壁と消弧装置が別々であるものに較
べて、消弧空間のスペースを有効に利用でき、消弧板の
ボリュームを大きくできる。
〔実施例］
以下、この発明の一実施例を第１図および第２図につい
て説明する。第１図および第２図はこの発明による２点
切り遮断器の消弧装置を示している。図において、（１
４Ａ）は隔壁、（１ ７Ａ）は消弧板（１６Ａ）を保
持する保持板で、隔壁（１４Ａ）の両側からそれぞれ突
き出た支持板（ｌ８），（１８）によって隔壁（１ ４
Ａ）の両側に一体的に影成されている。隔壁（１ ４Ａ
）と保持板（１ ７Ａ）との互いに対向する内側面には
、各々溝（ｌ９）が設けられている。消弧板（１ ６Ａ
）はこれらの溝（ｌ９）に端部（１６ｃ）が圧入される
ことにより保持されている。
第３図は、第１図および第２図に示した消弧装置を筐体
（１ｌ）に組み込んだ状態を示している次に動作につい
て説明する。この発明によれば、第１、第２の消弧装置
を隔壁（１４Ａ）の両側に隔壁（１４Ａ）と一体にして
いるため、従来は隔壁（ｌ４）と二つの消弧装置を各々
別々に筐体（１１）に組み込まなければならなかったの
が、１回の作業で済むようになった．すなわち隔壁（１
４Ａ）と消弧装置を筐体（１１）に組み込むのに必要な
手間を３分の１に減らすことが可能になった。
次に、隔壁（１４Ａ）と保持板（１７Ａ）とを一体にし
て、隔壁（１４Ａ）の一部を消弧板（１６Ａ）の保持に
利用できるため、消弧板（１６Ａ）を保持するために必
要なスペースが小さくできる。その結果、消弧板（１６
Ａ）の幅を消弧空間（１２）．（１３）の幅にほぼ等し
くすることができ、消弧板（１ ６Ａ）のボリュームを
増すことができる。これは、大電流遮断時のアークによ
る消弧板（１６Ａ）の損傷を低減することになる。
特に第１図に示す実施例では、保持板（１ ７Ａ）に消
弧板（１６Ａ）を固定するのに、溝（１９）に圧入する
手段を用いているため、カシメ用突起のスペースを保持
板（１７Ａ）の外側に確保する必要がないため、さらに
消弧板（１６Ａ）の幅を広くすることができる．
なお、上記実施例では隔壁（１４Ａ）とそれにほぼ平行
な保持板（１７Ａ）によって消弧板（１６Ａ）を保持し
ているが、第４図および第５図に示すように保持板が隔
壁（１４Ａ）と垂直になるように構或してもよい。第４
図および第５図において、（１ ７Ｂ）．（１ ７Ｃ）
が溝（ｌ９）のある保持板で、隔壁（１ ４Ａ）に垂直
に設けられている。（１７Ｃ）にはアークの消弧板（１
６Ａ）への吸引を妨げないように開孔部（２０）を設け
てある。このような構成にすると、消弧板（１６Ａ）の
幅を消弧空間（１２）．（１３）の幅一杯まで広げられ
るため、アーク遮断時の損傷をさらに低減できる。
［発明の効果］
以上のように、この発明によれば二つの消弧装置を隔壁
と一体にした保持板によって複数枚の消弧板を保持する
ように構成したので、消弧装置の筐体への組み込みの手
間が軽減でき、また消弧板のボリュームも大きくできる
ため電気的耐久性能のよい２点切り回路遮断器が得られ
るという効果がある。In this invention, since the partition wall and the two arc extinguishing devices are integrated, it only takes one effort to incorporate the arc extinguishing device into the housing. Furthermore, since the retaining plate of the arc extinguishing plate is integrated with the partition wall, the space of the arc extinguishing space can be used more effectively and the volume of the arc extinguishing plate can be increased, compared to a case where the partition wall and the arc extinguishing device are separate. [Example] An example of the present invention will be described below with reference to FIGS. 1 and 2. 1 and 2 show an arc extinguishing device for a two-point circuit breaker according to the present invention. In the figure, (1
4A) is a partition wall, and (1 7A) is a holding plate that holds an arc extinguishing plate (16A).
A) is integrally shaded on both sides. Bulkhead (1 4A
) and the holding plate (17A) are each provided with a groove (19) on their opposing inner surfaces. Arc-extinguishing plate (1 6A
) are held by the ends (16c) being press-fitted into these grooves (19). FIG. 3 shows a state in which the arc extinguisher shown in FIGS. 1 and 2 is assembled into a housing (1l).Next, the operation will be explained. According to the present invention, the first and second arc extinguishing devices are integrated with the partition wall (14A) on both sides of the partition wall (14A). The work that used to have to be assembled into the housing (11) can now be done in one go. That is, the partition wall (1
4A) and the arc extinguishing device into the housing (11) can now be reduced to one-third. Next, by integrating the partition wall (14A) and the holding plate (17A), a part of the partition wall (14A) can be used for holding the arc-extinguishing plate (16A). The space required can be reduced. As a result, arc extinguishing plate (16
The width of A) is the arc extinguishing space (12). (13) can be made almost equal to the width of arc extinguishing plate (16A), and the volume of arc extinguishing plate (16A) can be increased. This reduces damage to the arc extinguishing plate (16A) due to arcing when a large current is interrupted. In particular, in the embodiment shown in Fig. 1, the arc-extinguishing plate (16A) is fixed to the holding plate (17A) by press-fitting it into the groove (19), so the space for the caulking protrusion is maintained. Since there is no need to secure it on the outside of the plate (17A), the width of the arc-extinguishing plate (16A) can be further increased. In the above embodiment, the arc-extinguishing plate (16A) is held by the partition wall (14A) and the holding plate (17A) that is substantially parallel to the partition wall (14A), but as shown in FIGS. 4 and 5, the holding plate is attached to the partition wall ( 14A). Fourth
In the figure and FIG. 5, (1 7B). (1 7C)
is a retaining plate with a groove (19) and is provided perpendicularly to the partition wall (14A). (17C) has an arc extinguishing plate (1
An opening (20) is provided so as not to impede suction to 6A). With such a configuration, the width of the arc extinguishing plate (16A) can be adjusted to the arc extinguishing space (12). Since it can be expanded to the full width of (13), damage during arc interruption can be further reduced. [Effects of the Invention] As described above, according to the present invention, two arc extinguishing devices are configured so that a plurality of arc extinguishing plates are held by a retaining plate integrated with a partition wall, so that the casing of the arc extinguishing device This has the effect that a two-point circuit breaker with good electrical durability can be obtained because the effort required for assembling the circuit breaker can be reduced and the volume of the arc-extinguishing plate can be increased.
第１図はこの発明の一実施例による消弧装置の側面図、
第２図は第１図の線ｎ − ｘｆの断面図、第３図は第
１図の消弧装置を筐体に組み込んだ状態を示す平面図、
第４図はこの発明の他の実施例を示す消弧装置の側面図
、第５図は第４図を右からみた図、第６図は従来の２点
切り回路遮断器の開閉部の斜視図、第７図は第６図の開
閉部を筐体に組み−込んだ状態を示す斜視図、第８図は
従来の消弧装置を示す側面図、第９図は第８図の線ＩＸ
−ＩＸの断面図、第１０図は第８図の消弧装置を筐体に
組み込んだ状態を示す平面図、第１１図は第１０図の線
ＸＩ−ＸＩの断面図である。
図において、（１）は第１の固定接触子、（２）は第１
の固定接点、（３）は第１の可動接点、（４）は第１の
可動接触子、（５）は第２の可動接触子、（７）は第２
の可動接点、（８）は第２の固定接点、（９）は第２の
固定接触子、（１１）は筐体、（１４Ａ）は隔壁、（１
６Ａ）は消弧板、（１７Ａ）は保持板を示す。
なお、FIG. 1 is a side view of an arc extinguishing device according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along line n-xf in FIG. 1, and FIG. 3 is a plan view showing the arc extinguishing device in FIG.
Fig. 4 is a side view of an arc extinguishing device showing another embodiment of the present invention, Fig. 5 is a view of Fig. 4 seen from the right, and Fig. 6 is a perspective view of the opening/closing part of a conventional two-point circuit breaker. Figure 7 is a perspective view showing the opening/closing part shown in Figure 6 incorporated into the housing, Figure 8 is a side view showing a conventional arc extinguishing device, and Figure 9 is line IX in Figure 8.
-IX is a sectional view, FIG. 10 is a plan view showing the arc extinguishing device shown in FIG. 8 assembled into a housing, and FIG. 11 is a sectional view taken along line XI-XI in FIG. In the figure, (1) is the first fixed contact, (2) is the first
(3) is the first movable contact, (4) is the first movable contact, (5) is the second movable contact, (7) is the second movable contact.
(8) is the second fixed contact, (9) is the second fixed contact, (11) is the housing, (14A) is the partition wall, (1
6A) shows an arc-extinguishing plate, and (17A) shows a holding plate. In addition,
Claims (1)
、前記第１の固定接点に接離可能な第１の可動接点が固
着された第１の可動接触子と、この第１の可動接触子と
略Ｕ字状に連結されかつ第２の可動接点が固着された第
２の可動接触子と、前記第２の可動接点に接離可能な第
２の固定接点が固着された第２の固定接触子と、前記第
１、第２の可動接触子の各可動接点の固着されている端
部の空間にそれぞれ設置されている複数枚の消弧板から
なる第１、第２の消弧装置と、前記二つの可動接触子の
開閉時の軌跡が作る平面が互いに略平行でかつこれらの
平面の中間にこれらの平面にほぼ平行な前記２組の接触
子、消弧空間を隔てる絶縁物からなる隔壁と、前記２組
の接触子、消弧装置、隔壁を収納する絶縁物の筐体とか
ら成る回路遮断器において、 前記隔壁に一体的に形成される保持板に、前記複数枚の
消弧板を固定することによって前記二つの消弧装置が前
記隔壁と一体に構成されることを特徴とする回路遮断器
。(1) A first fixed contact to which a first fixed contact is fixed; a first movable contact to which a first movable contact that can come into contact with and separate from the first fixed contact; a second movable contact that is connected to the first movable contact in a substantially U-shape and has a second movable contact fixed thereto, and a second fixed contact that can come into contact with and separate from the second movable contact is fixed. a second fixed contact, and a plurality of arc-extinguishing plates each installed in a space at the fixed end of each movable contact of the first and second movable contacts; The arc extinguishing device of No. 2 and the planes formed by the trajectories of the two movable contacts when opening and closing are substantially parallel to each other, and the two sets of contacts and the arc extinguishing space are located between these planes and are substantially parallel to these planes. A circuit breaker comprising a partition made of an insulating material that separates the circuit breaker, and an insulating casing that houses the two sets of contacts, the arc extinguisher, and the partition, and a retaining plate integrally formed with the partition, A circuit breaker characterized in that the two arc extinguishing devices are configured integrally with the partition wall by fixing the plurality of arc extinguishing plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24135589A JPH03102735A (en) | 1989-09-18 | 1989-09-18 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24135589A JPH03102735A (en) | 1989-09-18 | 1989-09-18 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03102735A true JPH03102735A (en) | 1991-04-30 |
Family
ID=17073063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24135589A Pending JPH03102735A (en) | 1989-09-18 | 1989-09-18 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03102735A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5589672A (en) * | 1994-06-14 | 1996-12-31 | Fuji Electric Co., Ltd. | Circuit breaker with arc quenching device and vent |
| JP2009009840A (en) * | 2007-06-28 | 2009-01-15 | Fuji Electric Assets Management Co Ltd | Circuit breaker |
-
1989
- 1989-09-18 JP JP24135589A patent/JPH03102735A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5589672A (en) * | 1994-06-14 | 1996-12-31 | Fuji Electric Co., Ltd. | Circuit breaker with arc quenching device and vent |
| JP2009009840A (en) * | 2007-06-28 | 2009-01-15 | Fuji Electric Assets Management Co Ltd | Circuit breaker |
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