JPH03295117A - Switch - Google Patents
SwitchInfo
- Publication number
- JPH03295117A JPH03295117A JP9388590A JP9388590A JPH03295117A JP H03295117 A JPH03295117 A JP H03295117A JP 9388590 A JP9388590 A JP 9388590A JP 9388590 A JP9388590 A JP 9388590A JP H03295117 A JPH03295117 A JP H03295117A
- Authority
- JP
- Japan
- Prior art keywords
- arc
- extinguishing
- contact
- metal arc
- metal
- 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
- 239000002184 metal Substances 0.000 claims abstract description 46
- 229910052751 metal Inorganic materials 0.000 claims abstract description 46
- 230000000750 progressive effect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野コ
この発明は電流の開閉を行う開閉器に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a switch that switches on and off current.
[従来の技術]
従来の開閉器としては、例えば実公昭63−42447
号公報に示された電磁接触器があり第5図はその部分断
面図である。この電磁接触器は左右対称の構造であるの
で、図ではその右φす断面のみを示す。[Prior art] As a conventional switch, for example, the Japanese Utility Model Publication No. 63-42447
There is an electromagnetic contactor shown in the publication, and FIG. 5 is a partial sectional view thereof. Since this electromagnetic contactor has a symmetrical structure, only the right φ cross section is shown in the figure.
図において、(1)はプラスチック等で形成された取付
台、(2)はこの取付台(1)上に硅素鋼板で積層され
た固定鉄心、(3)はこの固定鉄心(2)に対向配置さ
れ、同様に硅素鋼板で積層された可動鉄心、(4)は固
定鉄心(2)と可動鉄心(3)とを引き外しバネ(図示
せず)に抗して吸着させる駆動力を付与するための操作
コイル、(5〉はプラスチックで形成され、かつ角窓を
有するクロスバ−であり、その下端には可動鉄心(3)
が保持されている。(6)は上記クロスバ−(5)の角
窓に挿入され、押しバネ(7)によって保持されている
可動接触子、(6a)は可動接触子(6)に接合された
可動接点、(8)は上記可動接触子(6)に対向して設
けられ、電流通電を行う固定接触子、(8a)はこの固
定接触子(8)に接合された固定接点、(8b)はこの
固定接触子(8)の端子部を示す。(9)は電磁接触器
本体を外部回路に接続するための端子ねじ、(10)は
固定接触子(8)を取付けるベース、(11)は電磁接
触器上面を覆うカバーで、その内部には固定接点(8a
)と可動接点(6a)との間に生じるアーク(12)を
消弧するための板状の磁性金属による複数の板状の金属
消弧グリッド(13)が設けられて消弧室を形成してい
る。この金属消弧グリッド(13)は図より明らかなよ
うに、可動接触子(6)と対向させ、固定接触子(8)
の上方にこれと平行しかつ互に所定間隔を隔てて累積併
設されている。In the figure, (1) is a mounting base made of plastic, etc., (2) is a fixed core laminated with silicon steel plates on this mounting base (1), and (3) is placed opposite this fixed core (2). Similarly, the movable core (4) is laminated with silicon steel plates, and the movable core (4) is used to provide a driving force to attract the fixed core (2) and the movable core (3) against a tripping spring (not shown). The operation coil (5) is a crossbar made of plastic and has a square window, and the movable iron core (3) is located at the lower end of the crossbar.
is retained. (6) is a movable contact inserted into the corner window of the crossbar (5) and held by a push spring (7); (6a) is a movable contact joined to the movable contact (6); ) is a fixed contact that is provided opposite to the movable contact (6) and conducts current flow, (8a) is a fixed contact joined to this fixed contact (8), and (8b) is this fixed contact. (8) shows the terminal section. (9) is a terminal screw for connecting the electromagnetic contactor main body to an external circuit, (10) is a base for attaching the fixed contact (8), and (11) is a cover that covers the top surface of the electromagnetic contactor. Fixed contact (8a
) and the movable contact (6a), a plurality of plate-shaped metal arc-extinguishing grids (13) made of plate-shaped magnetic metal are provided to extinguish the arc (12) generated between the movable contact (6a) and the arc-extinguishing chamber. ing. As is clear from the figure, this metal arc extinguishing grid (13) is placed opposite the movable contact (6), and the fixed contact (8)
They are arranged above and in parallel with each other and spaced apart from each other by a predetermined distance.
従来の開閉器は上記のように構成され、次のような動作
を行う。操作コイル(4)の励磁により可動鉄心(3)
が固定鉄心(2)に吸着した状態から、操作コイル(4
)を消磁すると、図示しない引き外しバネによって可動
鉄心(3)は固定鉄心(2)より開離し、クロスバ−(
5)は図に示された上位の位置に移る。このとき固定接
点(8a)と可動接点(8a)とが開離して、通電状態
にあった両者の間には図示のような態様のアーク(12
)を生じ、アーク(12)中に電流Iが流れる。第6図
(a)のように電流■が流れる場合、この電流Iにより
磁界が生じ、この磁界はフレミング左手の法則により、
アーク(12)を駆動する力を発生する。この力Fの方
向は可動接点(6a)側では可動接触子(6)と可動接
点(6a)の側のアーク(12)に流れる電流による磁
界の合成によって電磁接触子器の外側方向、固定接点(
8a)側では固定接触子(6)と固定接点(8a)側の
アーク(12)に流れる電流による磁界の合成によって
内側方向となる。また一般に第6図(C)のように電流
路(16)により生じた磁界内に磁性体(15)をおく
と、磁束は磁性体(15)に引き込まれて磁束密度分布
が変化し、図において、左側は密に、右側(磁性体側)
は疎になり、電流路(16)は磁性体(15)の方向に
力Fsを受ける。金属消弧グリッド(13)は上記磁性
体(15)に相当し、アーク(12)は上記電流路(1
6)に相当するから、アーク(12)に対し力Fsを与
えるので、アーク(12)の可動接点(6a)側では力
Fsが加わり、アーク(12)の固定接点(8a)側で
は力Fから力Fsが引かれ、アーク(12)には結果と
して第6図(b)に示すような駆動力が加わる。このた
めアーク(12)は磁性体の金属消弧グリッド(13)
に吸引されて第5図における(12a)のように移行し
、ここで金属消弧グリッド(13)によって冷却されて
電流は遮断される。The conventional switch is configured as described above and operates as follows. The movable iron core (3) is activated by excitation of the operating coil (4).
is attracted to the fixed iron core (2), then the operation coil (4)
), the movable core (3) is separated from the fixed core (2) by a trip spring (not shown), and the crossbar (
5) moves to the upper position shown in the figure. At this time, the fixed contact (8a) and the movable contact (8a) are separated, and an arc (12
) and a current I flows in the arc (12). When current ■ flows as shown in Fig. 6(a), a magnetic field is generated by this current I, and this magnetic field is determined by Fleming's left hand rule as follows:
Generates the force that drives the arc (12). The direction of this force F is directed toward the outside of the electromagnetic contact device on the movable contact (6a) side due to the combination of the magnetic field caused by the current flowing in the movable contact (6) and the arc (12) on the movable contact (6a) side, and toward the outside of the electromagnetic contact device. (
On the 8a) side, the direction is inward due to the combination of magnetic fields caused by the current flowing in the fixed contact (6) and the arc (12) on the fixed contact (8a) side. Generally, when a magnetic body (15) is placed in the magnetic field generated by the current path (16) as shown in Figure 6(C), the magnetic flux is drawn into the magnetic body (15) and the magnetic flux density distribution changes. , the left side is dense, the right side (magnetic material side)
becomes sparse, and the current path (16) receives a force Fs in the direction of the magnetic body (15). The metal arc-extinguishing grid (13) corresponds to the magnetic material (15), and the arc (12) corresponds to the current path (1).
6), the force Fs is applied to the arc (12), so the force Fs is applied to the movable contact (6a) side of the arc (12), and the force Fs is applied to the fixed contact (8a) side of the arc (12). A force Fs is pulled from the arc (12), and as a result, a driving force as shown in FIG. 6(b) is applied to the arc (12). Therefore, the arc (12) is replaced by a magnetic metal arc extinguishing grid (13).
The electric current is attracted by the electric current and moves as shown in (12a) in FIG. 5, where it is cooled by the metal arc-extinguishing grid (13) and the current is cut off.
[発明が解決しようとする課題]
従来の開閉器は以上のように構成され、複数の板状の金
属消弧板(13)が所定間隔で固定接触子(6)の上方
に累積併設されているので、電流遮断時に発生し、これ
ら金属消弧板(13)に移行したアーク(12a)がく
の字状となっても、そのアーク(12a)のアーク長は
、はぼ金属消弧グリッド(13)の間隔に限定されるた
め、これを十分長くすることかでざず、遮断性能が劣る
という問題点があった。またアーク(12) 、(12
a)に伴うホットガスの冷却も複数の板状の金属消弧グ
リッド(13)ではホットガスの流れる方向が一定とな
り、流量制限されるため十分になされないという問題点
があった。[Problems to be Solved by the Invention] The conventional switch is configured as described above, and a plurality of plate-shaped metal arc-extinguishing plates (13) are cumulatively installed above the fixed contact (6) at predetermined intervals. Therefore, even if the arc (12a) that occurs when the current is cut off and migrates to the metal arc-extinguishing plate (13) becomes dogleg-shaped, the arc length of the arc (12a) is longer than that of the metal arc-extinguishing grid ( Since the interval is limited to 13), there is a problem that the interrupting performance is poor even if this interval is made sufficiently long. Also, arc (12), (12
There is also a problem in that the hot gas cannot be cooled sufficiently with the plurality of plate-shaped metal arc-extinguishing grids (13) because the hot gas flows in a constant direction and the flow rate is restricted.
本発明は上記のような課題を解決するためになされたも
ので、遮断性能が優れ、かつホットガスを効率よく冷却
することができる開閉器を得ることを目的としている。The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to obtain a switch that has excellent shutoff performance and can efficiently cool hot gas.
[課題を解決するための手段]
本発明に係る開閉器は、固定接点が接合された固定接触
子に接離する可動接点が接合された可動接触ヂと対向さ
せられ、固定接触子の上方にこれと平行して累積併設さ
れた複数の板状の金属消弧グリッドを、それぞれ可動接
触子の開離時に発生するアークの進行方向に垂直に、少
くとも2つ以上に分割するようにしたものである。[Means for Solving the Problems] A switch according to the present invention is arranged to face a movable contact to which a movable contact that approaches and separates the fixed contact is joined, and is arranged above the fixed contact. A plurality of plate-shaped metal arc-extinguishing grids installed in parallel in parallel are each divided into at least two or more pieces perpendicular to the traveling direction of the arc generated when the movable contact is opened. It is.
[作用コ
本発明における開閉器は板状の各金属消弧グリッドを可
動接触子の開離時に発生するアークの進行方向に対し垂
直に少なくとも2つ以上に分割し・たことにより、これ
ら分割された金属消弧グリッドに移行したアークは弓状
となり、内側の磁界は外側の磁界より強いため、次第に
アークをくの字状のアークへと移行させる。このくの字
状のアークは分割された各金属消弧グリッド間を横方向
にも渡るため、その分板状の金属消弧グリッドよりアー
ク長か長くなり、アーク電圧を上昇させる。[Operation] The switch according to the present invention is constructed by dividing each plate-shaped metal arc-extinguishing grid into at least two parts perpendicularly to the traveling direction of the arc generated when the movable contact is opened. The arc that has transitioned to the metal arc-extinguishing grid becomes bow-shaped, and since the magnetic field on the inside is stronger than the magnetic field on the outside, the arc gradually transitions to a dogleg-shaped arc. Since this dogleg-shaped arc also crosses laterally between the divided metal arc-extinguishing grids, the arc length becomes longer than that of the divided metal arc-extinguishing grids, increasing the arc voltage.
その結果、アークのエネルギとなる電流がしぼられ、消
弧がスムーズに行われることになり、遮断性能が向上す
る。また、分断された金属消弧グリッドではアークによ
って生じたホットガスが上下にも流れることができ、ガ
スの流れがスムーズとなり、しかも板状の金属消弧板に
比べて表面積が大きいため、ホットガスの冷却効果も増
大する。As a result, the current that provides the energy for the arc is reduced, the arc is extinguished smoothly, and the interrupting performance is improved. In addition, with the divided metal arc-extinguishing grid, the hot gas generated by the arc can flow up and down, making the gas flow smoother.Furthermore, the hot gas The cooling effect is also increased.
[実施例]
第1図は本発明の一実施例による開閉器の金属消弧グリ
ッドの斜視図である。この金属消弧グリッドは第5図の
従来の開閉器における板状の金属消弧グリッド(13)
に代わり、これを可動接触子の開離時に発生するアーク
の進行方向に対し垂直に複数に分割した形状のものであ
って、各金属消弧グリッドの断面形状は角形、円形等任
意である。[Embodiment] FIG. 1 is a perspective view of a metal arc-extinguishing grid of a switch according to an embodiment of the present invention. This metal arc-extinguishing grid is a plate-shaped metal arc-extinguishing grid (13) in the conventional switch shown in Fig. 5.
Instead, this metal arc-extinguishing grid is divided into a plurality of parts perpendicular to the traveling direction of the arc generated when the movable contact is opened, and the cross-sectional shape of each metal arc-extinguishing grid can be arbitrary, such as square or circular.
第1図において、(13)は分割された複数の金属消弧
グリッド、(14)はこれら金属消弧グリッド(13)
を保持する保持板である。第2図は金属消弧グリッド(
13)と接触子(6) 、 (8)との相対的な位置を
示す電磁接触器の部分側面図である。第2図において、
(6)は可動接触子、(6a)は可動接触子(6)に接
合された可動接点、(8)は上記可動接触子(6)に対
向して設けられ電流の通電を行う固定接触子、(8a)
は固定接触器(8)に接合された固定接点である。In FIG. 1, (13) is a plurality of divided metal arc-extinguishing grids, and (14) is the metal arc-extinguishing grid (13).
This is a holding plate that holds the Figure 2 shows the metal arc extinguishing grid (
FIG. 13 is a partial side view of the electromagnetic contactor showing the relative positions of the contacts (6) and (8). In Figure 2,
(6) is a movable contact, (6a) is a movable contact joined to the movable contact (6), and (8) is a fixed contact that is provided opposite to the movable contact (6) and conducts current. , (8a)
is a fixed contact joined to the fixed contactor (8).
このように構成された電磁接触器において、可動接触子
(6)が作動して可動接点(6a)と固定接点(8a)
とか開離すると、第2図に示すようにアーク(12)が
両接点<8a) 、 (8a)間に発生する。複数の金
属消弧グリッド(13)は、このアーク(12)の進行
方向に対し垂直になるように位置させられているので、
従来例で説明したように、アーク(12)は外側方向に
引かれて弓状のアーク(12b)となり、ここで内側の
磁界は外側の磁界より強く、アークはくの字状のアーク
(L2c)へと移行し、金属消弧グリッド(13)によ
り冷却されて消弧する。この移行したくの字状のアーク
(12c)は各金属消弧グリッド(13)間を第2図に
示すように横方向にも渡るため、従来例の第5図に示す
ような板状の金属消弧グリッド(13)を介する場合よ
り横方向にも渡る分アーク長が長くなる。そのため、ア
ーク電圧が上昇しくこれは接点間の抵抗が高くなったこ
とになる)電流がしぼられる。従って、アークのエネル
ギ12Rは殆ど電流lに依存していたので、電流lか小
さくなれば、アークエネルギが小さくなり、消弧がスム
ーズに行われて遮断性能が向上する。In the electromagnetic contactor configured in this way, the movable contactor (6) operates to connect the movable contact (6a) and the fixed contact (8a).
When the contacts open, an arc (12) is generated between both contacts <8a) and (8a) as shown in FIG. Since the plurality of metal arc extinguishing grids (13) are positioned perpendicular to the traveling direction of the arc (12),
As explained in the conventional example, the arc (12) is drawn outward to form a bow-shaped arc (12b), where the inner magnetic field is stronger than the outer magnetic field, and the arc becomes a dogleg-shaped arc (L2c). ) and is cooled by the metal arc-extinguishing grid (13) to extinguish the arc. This transitional dogleg-shaped arc (12c) crosses between each metal arc extinguishing grid (13) in the horizontal direction as shown in Fig. 2, so the plate-shaped arc (12c) as shown in Fig. The length of the arc becomes longer because it also extends in the lateral direction than when using the metal arc-extinguishing grid (13). As a result, the arc voltage increases (which means that the resistance between the contacts has increased) and the current is throttled. Therefore, since the arc energy 12R was mostly dependent on the current 1, if the current 1 becomes smaller, the arc energy becomes smaller, the arc is extinguished smoothly, and the interrupting performance is improved.
またアークにより生じたホットガスは金属消弧グリッド
(13)間を通って流れるが、従来例のような板状の金
属消弧グリッド(13)の場合は流れが一定方向でかつ
流量も制限されるのに対し、この場合は上下方向にも流
れることでガスの胤れはスムーズとなり、金属消弧グリ
ッドの表面積も従来の板状の金属消弧板に比べて大きい
ため、ホットガスの冷却効率も向上した。In addition, the hot gas generated by the arc flows between the metal arc extinguishing grids (13), but in the case of a plate-shaped metal arc extinguishing grid (13) like the conventional example, the flow is in a fixed direction and the flow rate is limited. In contrast, in this case, the gas flows in the vertical direction as well, making the flow of gas smoother, and the surface area of the metal arc-extinguishing grid is larger than that of conventional plate-shaped metal arc-extinguishing plates, which improves hot gas cooling efficiency. has also improved.
なお、上記実施例においては、均等分割した金属消弧グ
リッド(13)を設けた例について説明したが、第3図
のように交互にずらせた配置の金属消弧グリッド([3
)とするもの、あるいは第4図のように各金属消弧グリ
ッド(13)の幅を任意に選んで配置した構成にしても
よい。In the above embodiment, an example was explained in which the metal arc-extinguishing grids (13) were equally divided; however, as shown in Fig. 3, metal arc-extinguishing grids ([3]
), or as shown in FIG. 4, the width of each metal arc-extinguishing grid (13) may be arbitrarily selected and arranged.
また、上記実施例では電磁開閉器の場合について説明し
たが、遮断器、断路器その他の開閉器であってもよく、
上記実施例と同様の効果を奏する。Further, in the above embodiment, the case of an electromagnetic switch was explained, but it may be a circuit breaker, a disconnector, or other switch.
The same effects as in the above embodiment are achieved.
[発明の効果]
以上のように本発明によれば、金属消弧グリッドを可動
接触子の開離時に発生するアークの進行方向に対し垂直
に少なくとも2つ以上に分割したので、アーク長を長く
でき、消弧がよりスムーズとなって遮断性能が向上し、
ホットガスの流れを上下方向にも流してガスの流れをス
ムーズにし、表面積も太き(なって冷却効果が向上する
という効果を有する。[Effects of the Invention] As described above, according to the present invention, the metal arc-extinguishing grid is divided into at least two parts perpendicularly to the traveling direction of the arc generated when the movable contact is opened, so that the arc length can be increased. arc extinguishing becomes smoother and interrupting performance is improved.
It has the effect of making the flow of hot gas smooth in the vertical direction, and increasing the surface area (thus improving the cooling effect).
第1図は本発明の一実施例による金属消弧グリッドの斜
視図、第2図は金属消弧グリッドと接触子との相対位置
を示す電磁接触器の部分側面図、第3図と第4図は本発
明の他の実施例を示す金属消弧グリ・ノドの断面図、第
5図は従来の電磁接触器の部分断面図、第6図(a)
、(b) 、 (c)はアークが磁界によって受ける力
を説明するための説明図である。
図において、(6)は可動接触子、(6a)は可動接点
、(8)
アーク、
消弧グリ
なお、
す。
は固定接触子、(8a)は固定接点、(12)は(12
b) 、 (12c)は移行アーク、(13)は金属ラ
ドである。FIG. 1 is a perspective view of a metal arc-extinguishing grid according to an embodiment of the present invention, FIG. 2 is a partial side view of an electromagnetic contactor showing the relative positions of the metal arc-extinguishing grid and the contacts, and FIGS. The figure is a sectional view of a metal arc extinguishing grill/nod showing another embodiment of the present invention, FIG. 5 is a partial sectional view of a conventional electromagnetic contactor, and FIG. 6(a)
, (b) and (c) are explanatory diagrams for explaining the force that an arc receives from a magnetic field. In the figure, (6) is a movable contact, (6a) is a movable contact, and (8) is an arc. is a fixed contact, (8a) is a fixed contact, (12) is (12
b) , (12c) is a transitional arc, and (13) is a metal rad.
Claims (1)
離する可動接点が接合された可動接触子と、前記可動接
触子と対向させられ、前記固定接触子の上方にこれと平
行して累積併設された複数の板状の金属消弧グリッドと
を備えた開閉器において、前記各金属消弧グリッドを前
記可動接触子の開離時に発生するアークの進行方向に対
し垂直に少くとも2つ以上に分割したことを特徴とする
開閉器。a fixed contact to which a fixed contact is joined; a movable contact to which a movable contact that comes into contact with and separates from the fixed contact is joined; In a switch equipped with a plurality of plate-shaped metal arc-extinguishing grids arranged side by side, each of the metal arc-extinguishing grids is arranged perpendicularly to the traveling direction of the arc generated when the movable contactor is opened and closed. A switch characterized by being divided into the above parts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9388590A JPH03295117A (en) | 1990-04-11 | 1990-04-11 | Switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9388590A JPH03295117A (en) | 1990-04-11 | 1990-04-11 | Switch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03295117A true JPH03295117A (en) | 1991-12-26 |
Family
ID=14094936
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9388590A Pending JPH03295117A (en) | 1990-04-11 | 1990-04-11 | Switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03295117A (en) |
-
1990
- 1990-04-11 JP JP9388590A patent/JPH03295117A/en active Pending
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