JPH0341927B2

JPH0341927B2 -

Info

Publication number: JPH0341927B2
Application number: JP57015747A
Authority: JP
Priority date: 1982-02-03
Filing date: 1982-02-03
Publication date: 1991-06-25
Also published as: JPS58133708A

Description

【発明の詳細な説明】この発明は電力開閉装置に係り、特にアークラ
ンナの改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power switchgear, and particularly to an improvement of an arc runner.

従来の電力開閉装置は、第１図、第２図、第３
図のように構成されている。図において、１は耐
熱性の材料よりなるアークボツクスを示し、磁性
金属よりなる消弧グリツド２および転流板３が開
閉する電路の相数に対応して配設固定されてい
る。４はクロスバー、５は可動接触子、６は可動
接触子５の両端に取り付けられた可動接点、７は
可動接触子押え、８は押えばね支え、９は接触子
ばね、１０はストツパーである。上記接触子ばね
９はストツパー１０の下部と押えばね支え８の下
端部との間に圧縮固定されており、押えばね支え
８の上端部と可動接触子押え７の上面および可動
接触子５の上面と可動接触子押え７の下面とは当
接して組立てられている。１２はベース１１の上
部にねじで固定された端子、１３は端子１２の上
面にねじ締めされたコの字形状の固定接触子で、
その上面には固定接点１４が取付けられている。
１５は固定接触子１３に固定されたアークランナ
ーである。かかる可動接触子５は接触子ばね９を
介して内蔵された周知の電磁駆動装置に接続され
る。 Conventional power switchgears are shown in Figures 1, 2, and 3.
It is configured as shown in the figure. In the figure, reference numeral 1 denotes an arc box made of a heat-resistant material, and an arc extinguishing grid 2 and a commutation plate 3 made of magnetic metal are arranged and fixed in correspondence with the number of phases of the electrical circuit to be opened and closed. 4 is a cross bar, 5 is a movable contact, 6 is a movable contact attached to both ends of the movable contact 5, 7 is a movable contact holder, 8 is a presser spring support, 9 is a contact spring, and 10 is a stopper. . The contact spring 9 is compressed and fixed between the lower part of the stopper 10 and the lower end of the presser spring support 8, and the upper end of the presser spring support 8, the upper surface of the movable contact holder 7, and the upper surface of the movable contact 5. and the lower surface of the movable contact holder 7 are assembled so as to be in contact with each other. 12 is a terminal fixed to the top of the base 11 with a screw, 13 is a U-shaped fixed contact screwed to the top surface of the terminal 12,
A fixed contact 14 is attached to its upper surface.
15 is an arc runner fixed to the fixed contact 13. The movable contactor 5 is connected via a contactor spring 9 to a well-known electromagnetic drive device incorporated therein.

このような接点機構はＡ−Ａ断面を中心に左右
対称に設けられるとともに紙面に直行する方向に
開閉する電路の相数に対応して配設されている。 Such contact mechanisms are provided symmetrically with respect to the A-A cross section, and are arranged in correspondence with the number of phases of the electrical circuits that open and close in the direction perpendicular to the plane of the paper.

第２図は第１図の要部である転流板３、可動接
触子５、可動接点６を模写的に示す斜視図であ
り、また、第１図における固定接触子１３、固定
接点１４およびアークランナ１５の部分を模写的
に拡大すると第３図ａ，ｂのようになつている。 FIG. 2 is a perspective view schematically showing the commutation plate 3, movable contact 5, and movable contact 6, which are the main parts of FIG. 1, and also shows the fixed contact 13, fixed contact 14, and When the portion of the arc runner 15 is schematically enlarged, it looks as shown in FIGS. 3a and 3b.

かかる電力開閉装置において、固定接点１４と
可動接点６とが開離された場合、両接点間に生じ
たアークの一端は、可動接点６から転流板３へ転
移する一方、その他端は固定接点１４からアーク
ランナ１５へ転移する。転移したアークの他端
は、アークランナ１５上を端部方向へ移動し、最
終的にはアークランナ１５の垂直部分と、これに
対向する転流板３との間でアークは消弧される。 In such a power switchgear, when the fixed contact 14 and the movable contact 6 are opened, one end of the arc generated between the two contacts is transferred from the movable contact 6 to the commutation plate 3, while the other end is transferred to the fixed contact. Transfer from 14 to arc runner 15. The other end of the transferred arc moves toward the end on the arc runner 15, and finally the arc is extinguished between the vertical portion of the arc runner 15 and the commutation plate 3 facing thereto.

ところで、上記アークランナ１５においては、
第３図に示すように、固定接点１４からアークラ
ンナ１５のＰ点へアークの一端が転移すると、今
Ｐ点はちようどアークランナ１５の巾方向の中間
点近傍であるため、アークランナの両端Ａ、Ｂか
ら点Ｐへ向けて流れる電流i₁、i₂が互いに等しく
なる。この電流i₁、i₂による磁界から生じる力Ｆ
は、図面上で固定接点方向に生じるため、アーク
はアークランナの端部方向へ走らずＰ点に留ま
り、そのためアークの膠着が起り、電流のしや断
不能となる欠点があつた。 By the way, in the arc runner 15,
As shown in FIG. 3, when one end of the arc is transferred from the fixed contact 14 to point P of the arc runner 15, the point P is now near the midpoint in the width direction of the arc runner 15, so both ends A, B of the arc runner The currents i ₁ and i ₂ flowing from to point P become equal to each other. Force F generated by the magnetic field due to these currents i ₁ and i ₂
Since this occurs in the direction of the fixed contact in the drawing, the arc does not run toward the end of the arc runner and remains at point P, which causes the arc to stagnate, resulting in a drawback that the current cannot be cut.

そこで、この発明はアークランナにＶ字状の切
欠き溝をアークランナの長手方向に設けることに
より、固定接点からアークランナへ転移したアー
クの膠着現象によるしや断不能を防止した電力開
閉装置を提供することを目的としている。 SUMMARY OF THE INVENTION Therefore, the present invention provides a power switchgear which prevents the inability to cut the arc due to the sticking phenomenon of the arc transferred from the fixed contact to the arc runner by providing a V-shaped notch groove in the arc runner in the longitudinal direction of the arc runner. It is an object.

第４図ａ，ｂは、この発明の一実施例を示す模
写的構成図である。 FIGS. 4a and 4b are schematic diagrams showing an embodiment of the present invention.

図中、１３〜１５は第１図、第３図と同一構成
である。１３ａは固定接点１４が接合された第１
の片、１３ｂは第１の片１３ａに連なり反可動接
点側に延在する第２の片、１３ｃは第２の片１３
ｂに連なり第１の片１３ａと並行状に設けられた
第３の片であり、固定接触子１３はこれら第１〜
第３の片１３ａ〜１３ｃによりコ字状に構成され
ている。１５ａは第２の片１３ｂあるいは第３の
片１３ｃの少なくとも一方（この例では第３の片
１３ｃ）と電気的に接続された第４の片、１５ｂ
は第４の片１５ａに連なり第１の片１３ａの可動
接点側に第１の片１３ａと空間を隔てて設けられ
た第５の片、１５ｃは可動接触子１３と空間を隔
てて設けられ第５の片１５ｂの反固定接点側に連
なつて可動接点開離方向と並行に延びる第６の片
であり、アークランナ１５はこれら第４〜第６の
片１５ａ〜１５ｃから構成されている。また、ア
ークランナの第５の片１５ｂには可動接点が上下
動できるＶ字状の切欠き溝１６が長手方向に設け
られている。 In the figure, 13 to 15 have the same configuration as in FIGS. 1 and 3. 13a is the first contact to which the fixed contact 14 is connected.
The piece 13b is a second piece that is connected to the first piece 13a and extends toward the side opposite to the movable contact, and the piece 13c is the second piece 13.
b, and is a third piece provided in parallel with the first piece 13a, and the fixed contact 13 is connected to the first piece 13a.
The third pieces 13a to 13c form a U-shape. 15a is a fourth piece 15b electrically connected to at least one of the second piece 13b or the third piece 13c (in this example, the third piece 13c);
15c is a fifth piece connected to the fourth piece 15a and provided on the movable contact side of the first piece 13a with a space between the first piece 13a and the movable contact 13a. The arc runner 15 is made up of these fourth to sixth pieces 15a to 15c. Further, the fifth piece 15b of the arc runner is provided with a V-shaped cutout groove 16 in the longitudinal direction in which the movable contact can move up and down.

このように構成されたアークランナ１５を備え
た電力開閉装置では、固定接点１４と可動接点６
とが開離されて両接点間に生じたアークの一端
は、固定接点からアークランナ１５のＰ点へ転移
する。ここで、アークランナ１５の第５の片１５
ｂにはＶ字状の切欠き溝１６が形成されているた
め、上記アークの一端は従来のようにアークラン
ナ１５の巾方向の中間点に転移することはなく、
必ずその中間点以外の点に転移することになる。
この転移点Ｐは第４図に示すとおりである。 In the power switchgear equipped with the arc runner 15 configured in this way, the fixed contact 14 and the movable contact 6
One end of the arc generated between the two contacts when they are separated is transferred from the fixed contact to point P of the arc runner 15. Here, the fifth piece 15 of the arc runner 15
Since the V-shaped notch groove 16 is formed in b, one end of the arc does not move to the midpoint in the width direction of the arc runner 15 as in the conventional case.
It will always be transferred to a point other than the intermediate point.
This transition point P is as shown in FIG.

さて、この点Ｐにアークが転移した場合、アー
クランナ１５の両端Ａ、Ｂから点Ｐまでの電流パ
ス長を比べると、Ａ端からの電流パス長に比べＢ
端からの電流パス長の方が長くなるため、これら
の電流パスを通る電流とこの電流により生じる磁
界とにより誘起される力は、従来のように固定接
点の方向を向くのではなく、その方向と反対方
向、つまりアークランナ１５の第６の片１５ｃが
ある端部方向へ向き、この力はアークをアークラ
ンナ１５上で端部方向に走らせる作用を持つこと
になる。これによつて、アークの一端がアークラ
ンナ１５上にとどまり、膠着現象を起こすことが
なくなる。すなわち、アークランナ１５の材料は
特に限定していないが、アークランナ１５の材料
としてたとえば磁性金属を用いると、アークｃの
作る磁力線は、第５図に太さの異なる破線で示し
ているように、アークの右側で疎になるので、ア
ークはアークランナ１５の第６の片１５ｃの方向
へ速やかに駆動され、優れたしや断性能を得るこ
とができる。 Now, when the arc transfers to this point P, comparing the current path length from both ends A and B of the arc runner 15 to point P, we find that B
Since the current path length from the end is longer, the force induced by the current passing through these current paths and the magnetic field generated by this current is directed towards the fixed contact, rather than pointing towards it as before. In other words, the sixth piece 15c of the arc runner 15 is directed toward a certain end, and this force has the effect of causing the arc to run on the arc runner 15 toward the end. As a result, one end of the arc remains on the arc runner 15, and no sticking phenomenon occurs. That is, although the material of the arc runner 15 is not particularly limited, if a magnetic metal is used as the material of the arc runner 15, the lines of magnetic force created by the arc c will be similar to the arc as shown by broken lines of different thickness in FIG. Since the arc becomes sparse on the right side of the arc runner 15, the arc is quickly driven in the direction of the sixth piece 15c of the arc runner 15, and excellent shear cutting performance can be obtained.

以上本発明をマグネツトで接点を開閉する電力
開閉装置、すなわち電磁開閉器に適用した場合に
ついて述べたが、配線用しや断器などの他の電力
開閉装置に適用できることは言うまでもない。 Although the present invention has been described above as being applied to a power switchgear that uses magnets to open and close contacts, that is, an electromagnetic switch, it goes without saying that it can also be applied to other power switchgears such as wiring switches and disconnectors.

以上のように本発明によれば、アークランナに
可動接点が溝内空間を上下動できるＶ字状の切欠
き溝を設けたので、アークはアークランナに短時
間で転移し、しかもアークは速やかに駆動される
結果、膠着現象がなくなり、しや断性能の優れた
電力開閉装置を得ることができる。 As described above, according to the present invention, since the arc runner is provided with a V-shaped notch groove that allows the movable contact to move up and down in the groove space, the arc is transferred to the arc runner in a short time, and the arc is quickly driven. As a result, the sticking phenomenon is eliminated, and a power switchgear with excellent shearing performance can be obtained.

[Brief explanation of drawings]

第１図は従来の電力開閉装置の一部断面を示す
構成図、第２図、第３図ａは第１図の一部を模式
的に示す斜視図、第３図ｂは第３図ａのＡ−Ａ断
面図、第４図ａはこの発明の一実施例を示す構成
図、第４図ｂは第４図ａのＡ−Ａ断面図、第５図
はアークの磁力を示す図である。図中、１３は固定接触子、１４は固定接点、１
５はアークランナ、１６は切欠き溝である。な
お、図中、同一符号は同一または相当部分を示
す。 Fig. 1 is a configuration diagram showing a partial cross section of a conventional power switchgear, Figs. 2 and 3 a are perspective views schematically showing a part of Fig. 1, and Fig. 3 b is a schematic diagram showing a part of Fig. 3 a. 4A is a configuration diagram showing an embodiment of the present invention, FIG. 4B is a sectional view taken along A-A of FIG. 4A, and FIG. 5 is a diagram showing the magnetic force of the arc. be. In the figure, 13 is a fixed contact, 14 is a fixed contact, 1
5 is an arc runner, and 16 is a notch groove. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims

[Claims]

1 A movable contact to which a movable contact is joined, a first piece to which a fixed contact is joined to which the movable contact contacts and separates, and a second piece that is connected to this first piece and extends on the side opposite to the movable contact. , a U-shaped fixed contact consisting of a third piece connected to the second piece and provided in parallel with the first piece; a second piece or a third piece of the fixed contact; a fourth piece electrically connected to at least one side; and a fourth piece connected to the fourth piece;
a fifth piece having a V-shaped notch groove provided on the movable contact side of the piece so as to be spaced apart from the first piece and allowing the movable contact to move up and down in the space within the groove; and the movable contact. and a sixth piece that is spaced apart from and connected to the side opposite to the fixed contact of the fifth piece and extends parallel to the movable contact opening direction; 6. A power switchgear characterized by comprising an arc extinguishing grid disposed between the piece No. 6 and the movable contact.