JPH081551Y2 - Arc breaker for circuit breaker - Google Patents
Arc breaker for circuit breakerInfo
- Publication number
- JPH081551Y2 JPH081551Y2 JP1987158995U JP15899587U JPH081551Y2 JP H081551 Y2 JPH081551 Y2 JP H081551Y2 JP 1987158995 U JP1987158995 U JP 1987158995U JP 15899587 U JP15899587 U JP 15899587U JP H081551 Y2 JPH081551 Y2 JP H081551Y2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- extinguishing
- plate
- insulating plate
- opening
- 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
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この発明は、回路しや断器の消弧装置、特にその消弧
能力の向上に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an arc extinguishing device for a circuit breaker or a breaker, and more particularly to improvement of its arc extinguishing ability.
第7図は例えば実開昭52−2166号や実開昭52−71051
号に開示された形式の消弧装置を備えた従来の回路しや
断器の部分断面側面図、第8図は第7図の消弧装置の平
面図であり、図において、(1)はしや断器ケース、
(2)は開閉機構(図示せず)に連結された可動接触
子、(201)はその接点、(3)は固定接触子(301)は
その接点、(4)は電流しや断時に前記接点(201),
(301)間に生じるアーク(A)を消弧する消弧装置、
(5)は外部導体、(6)は外部導体(5)を固定接触
子(3)に接続するための外部接続端子であって、(60
1)は外部接続端子(6)を固定接触子(3)に取付け
るねじ、(602)は外部導体(5)を外部接続端子
(6)に締付け保持するねじである。(7)は消弧装置
(4)と外部接続端子(6)との間に配設された絶縁隔
壁、(8)は固定接触子(3)に設けられたアークラン
ナである。FIG. 7 shows, for example, No. 52-2166 and No. 71051.
FIG. 8 is a partial cross-sectional side view of a conventional circuit breaker or circuit breaker equipped with an arc extinguishing device of the type disclosed in No. 5, FIG. 8 is a plan view of the arc extinguishing device of FIG. Shiya disconnector case,
(2) is a movable contactor connected to an opening / closing mechanism (not shown), (201) is its contact point, (3) is the fixed contactor (301) its contact point, (4) is the above-mentioned when current is turned on or off. Contact (201),
Arc extinguishing device for extinguishing arc (A) generated between (301),
(5) is an external conductor, (6) is an external connection terminal for connecting the external conductor (5) to the fixed contact (3),
Reference numeral 1) is a screw for attaching the external connection terminal (6) to the fixed contactor (3), and reference numeral (602) is a screw for fastening and holding the external conductor (5) to the external connection terminal (6). (7) is an insulating partition provided between the arc extinguishing device (4) and the external connection terminal (6), and (8) is an arc runner provided on the fixed contactor (3).
消弧装置(4)は接触子(2),(3)側に開口した
ほぼU字形の複数枚の消弧板(401)を側部支持板(40
2)によつて上下方向に互いに間隔を置いて重積関係に
保持してなるものであり、(403)は各消弧板(401)の
両脚部である。(9)はマイカ、アスベスト等の無機質
材料からなる絶縁板であつて、両脚部(403)の内側に
設けられ、消弧板(401)の両脚部(403)を全体的に覆
つている。The arc-extinguishing device (4) includes a plurality of substantially U-shaped arc-extinguishing plates (401) that are open to the side of the contacts (2) and (3), and a side support plate (40
2) are held in a stacking relationship at intervals in the vertical direction by (2), and (403) are both legs of each arc extinguishing plate (401). Reference numeral (9) is an insulating plate made of an inorganic material such as mica or asbestos, which is provided inside both legs (403) and entirely covers both legs (403) of the arc extinguishing plate (401).
次に動作について説明する。接触子(2),(3)が
閉じてその接点(201),(301)も閉じている状態にお
いて過電流等の大電流が流れると開閉機構を介して可動
接触子(2)が固定接触子(3)から離反し、接点(20
1),(301)が開離して接点(201),(301)間にアー
ク(A)が生じる。その時アーク(A)は,そのアーク
電流により消弧板(401)を通して形成される磁束とア
ーク電流との電磁作用により消弧板(401)の奥の方へ
駆動されて引延ばされ、消弧板(401)により分断、冷
却されて消弧される。絶縁板(9)はかかる消弧に際
し、消弧板(401)がアーク熱によつて溶融飛散するの
を防止すると共に前記実開昭51−2166号公報や実開昭52
−71051号公報には積極的には記載されていないが、ア
ークが接点(201)とか可動接触子(2)の先端あるい
は側面から消弧板(401)の脚部(403)に飛ぶのを防止
し、アークが脚部(403)に飛んでその位置に滞留し、
しや断不能になるのを防止する機能をも有する。Next, the operation will be described. When a large current such as an overcurrent flows while the contacts (2) and (3) are closed and the contacts (201) and (301) are also closed, the movable contact (2) is in stationary contact via the opening / closing mechanism. Move away from the child (3) and contact (20
1) and (301) are separated to generate an arc (A) between the contacts (201) and (301). At that time, the arc (A) is driven toward the back of the arc extinguishing plate (401) by the electromagnetic action of the magnetic flux formed through the arc extinguishing plate (401) by the arc current and the arc current to be stretched and extinguished. It is divided by the arc plate (401), cooled, and extinguished. During such arc extinction, the insulating plate (9) prevents the arc extinguishing plate (401) from being melted and scattered by arc heat, and at the same time, the above-mentioned Japanese Utility Model Publication No. 51-2166 and Japanese Utility Model Publication No. 52166.
Although it is not positively described in the −71051 publication, the arc is prevented from flying from the contact (201) or the tip or side of the movable contact (2) to the leg (403) of the arc extinguishing plate (401). Prevent, the arc flies to the leg (403) and stays there,
It also has the function of preventing unintentional disconnection.
しかし、絶縁板(9)は無機質材料からなつているた
め、しや断中はアーク熱によつて絶縁板(9)の表面が
溶融状態になるため電流零点における接点間の絶縁回復
力が小さくなり、しや断不能を起こすことがあり、量産
性がなく、製造コストが高いし、硬度が高いためもろ
く、振動衝撃で破損しやすく、更にアーク発生時に絶縁
板(9)の表面にひび割れが生じるなどヒートシヨツク
に弱い問題点があつた。However, since the insulating plate (9) is made of an inorganic material, the surface of the insulating plate (9) is in a molten state due to arc heat during breaking and breaking, so that the insulation recovery force between the contacts at the current zero point is small. In addition, there is no possibility of mass production, there is no mass productivity, the manufacturing cost is high, the hardness is high, it is fragile, and it is easily damaged by vibration and shock. Furthermore, when an arc occurs, the surface of the insulating plate (9) is cracked. There was a weak problem with the heat shock.
しかして、かかる問題点を解決するために特願昭62−
91202号(特開昭63−257138号)において絶縁板(9)
を樹脂材料で形成することが提案された。かかる樹脂材
料からなる絶縁板は無機質材料の場合のようにアーク熱
によつて表面が溶融状態になることがないので、しや断
中の表面抵抗が高く、しや断性能が良いし、安価に量産
することができ、振動衝撃を受けても破損しにくく、し
かもアークによるヒートシヨツクにも強い利点がある。
また、樹脂材料はアーク熱により加熱されて温度上昇す
ると絶縁性の分解ガスを発生し、この分解ガスの発生の
際にアークのエネルギーが前記分解ガスにより奪われる
と同時にアークが冷却され、更に分解ガスの圧力上昇に
より開閉接触子(2),(3)の開極速度を上昇させる
ので無機質の絶縁板(9)を設ける場合より消弧性能が
改善されるものである。Then, in order to solve such a problem, Japanese Patent Application No. 62-
Insulating plate (9) in 91202 (JP-A-63-257138)
It has been proposed to form the with a resin material. Since the insulating plate made of such a resin material does not have a surface melted by arc heat as in the case of an inorganic material, it has high surface resistance during combing and cutting, good cutting performance and inexpensive. Since it can be mass-produced, it is less likely to be damaged even when subjected to vibration and shock, and has a strong advantage in heat shock due to arc.
In addition, when the resin material is heated by the arc heat and its temperature rises, an insulating decomposition gas is generated, and when the decomposition gas is generated, the energy of the arc is deprived by the decomposition gas and at the same time the arc is cooled and further decomposed. The arc-extinguishing performance is improved as compared with the case where the inorganic insulating plate (9) is provided because the contact opening speed of the switching contacts (2) and (3) is increased by the increase of the gas pressure.
絶縁板(9)として使用するのに適用した樹脂材料に
ついては、特願昭62−91202号で説明されているところ
であるが、ここで改めて説明することにする。The resin material applied for use as the insulating plate (9) is described in Japanese Patent Application No. 62-91202, but it will be described here again.
樹脂材料は熱可塑性樹脂と熱硬化性樹脂とに大別さ
れ、絶縁板(9)に使用する場合の利点を熱可塑性樹脂
と熱硬化性樹脂との間で比較すると、一般に成形性、耐
振動、衝撃性、耐ヒートシヨツク性の点では熱硬化性樹
脂より熱可塑性樹脂の方が優れており、表面抵抗の点で
は熱可塑性樹脂より熱硬化性樹脂の方が優れている。分
解ガスの発生量は両者大差ない。その他、軽量であり、
振動、衝撃で消弧板との間に摩擦が生じても粉が発生し
にくく、たま耐湿性が良いという点で熱硬化性樹脂より
熱可塑性樹脂の方が優れ、熱変形温度が高く、熱膨張力
が小さい点では熱硬化性樹脂の方が優れている。更に、
具体的に述べると絶縁板(9)を形成するのに適した熱
可塑性樹脂としてはシリコーン樹脂およびポリエステル
樹脂を挙げることができ、熱硬化性樹脂としてはシリコ
ーン樹脂、ポリエステル樹脂の他、エポキシ樹脂、フエ
ノール樹脂を挙げることができる。シリコーン樹脂は先
に述べた一般的な特性を有する他、アークに触れて分解
ガスを発生しても、絶縁板(9)の表面に炭素を殆ど析
出することがないので、しや断後の絶縁不良、絶縁劣化
の心配がないという利点を有し、この点で他の樹脂材料
より優れている。Resin materials are roughly classified into thermoplastic resins and thermosetting resins, and when the advantages of using them for the insulating plate (9) are compared between thermoplastic resins and thermosetting resins, they are generally moldable and vibration resistant. The thermoplastic resin is superior to the thermosetting resin in terms of impact resistance and heat shock resistance, and the thermosetting resin is superior to the thermoplastic resin in terms of surface resistance. There is no great difference in the amount of decomposed gas generated. In addition, it is lightweight,
Thermoplastic resin is superior to thermosetting resin in that it does not easily generate powder even if friction with the arc-extinguishing plate is generated due to vibration or impact, and occasionally has good moisture resistance. The thermosetting resin is superior in that the expansion force is small. Furthermore,
Specifically, examples of the thermoplastic resin suitable for forming the insulating plate (9) include silicone resin and polyester resin, and examples of the thermosetting resin include silicone resin, polyester resin, epoxy resin, Mention may be made of phenolic resins. In addition to the general characteristics described above, the silicone resin does not substantially deposit carbon on the surface of the insulating plate (9) even when it decomposes upon contact with an arc to generate a decomposed gas. It has an advantage that there is no fear of insulation failure or insulation deterioration, and is superior to other resin materials in this respect.
また、ポリエステル樹脂、フエノール樹脂の場合に
は、これにガラスフアイバーを混入することによつて機
械的強度を大きくすることができる。なお、絶縁板
(9)の構成としては、通常の樹脂成形体とフアイバー
シートとが挙げられるが、同じ樹脂材料で形成してもフ
アイバーシートは通常の樹脂形成体に比較して分解ガス
量が多く、成形加工性も多く、プレス抜きも非常に容易
にできる利点がある。Further, in the case of polyester resin or phenol resin, the mechanical strength can be increased by mixing glass fiber therein. The structure of the insulating plate (9) includes an ordinary resin molded body and a fiber sheet. However, even if the insulating sheet (9) is formed of the same resin material, the fiber sheet has a decomposition gas amount larger than that of a normal resin formed body. It has many advantages such as high moldability and very easy press punching.
従来の回路しや断器は以上のように構成され、アーク
電流とこれにより形成される磁束との電磁作用により生
じる電磁駆動力によりアーク(A)を消弧装置(4)の
奥の方へ駆動して消弧するようになつており、短絡電流
のような大電流のしや断時には前記電磁駆動力が大きい
ためアーク(A)は消弧装置(4)の奥の方まで駆動さ
れて消弧されるが、過負荷電流のような比較的小さい電
流のしや断時には前記電磁駆動力が弱くて消弧装置
(4)の奥の方まで駆動されず、かつ両側に無機質材料
と樹脂材料とを問わず絶縁板(9)があつて消弧板(40
1)の脚部(403)に接触しえず、アーク(A)は冷却効
果が低いため、アーク(A)は消弧装置(4)の奥の方
まで駆動されないままに消弧不能となる問題点があつ
た。The conventional circuit breaker and circuit breaker are configured as described above, and the arc (A) is moved to the back of the arc extinguishing device (4) by the electromagnetic driving force generated by the electromagnetic action of the arc current and the magnetic flux formed by the arc current. The arc (A) is driven to the back of the arc extinguishing device (4) because the electromagnetic driving force is large when a large current such as a short-circuit current is turned on or off. The arc is extinguished, but when a relatively small current such as an overload current is turned on or off, the electromagnetic driving force is weak and the arc extinguishing device (4) is not driven to the inner side, and both sides are made of an inorganic material and a resin. Insulating plate (9) regardless of material
The arc (A) cannot be extinguished without being driven to the inner part of the arc extinguishing device (4) because the arc (A) cannot cool the leg (403) of 1) and the cooling effect is low. There was a problem.
この考案は従来のもののかかる問題点を解決するため
になされたもので、過負荷電流のような比較的小さい電
流のしや断時にもアークを確実に消弧しうる回路しや断
器の消弧装置を提供することを目的とする。This invention was made in order to solve such problems of the conventional ones, and a circuit or a circuit breaker that can surely extinguish the arc even when a relatively small current such as an overload current is cut or disconnected. An object is to provide an arc device.
この考案に掛かる消弧装置は、絶縁板の開閉接触子側
の縁部を一部切欠いてこの切欠いた部分において消弧板
の脚部をアークに対して露出する一方、開閉接触子とは
反対側の奥の部分は前記消弧板の脚部を全体的に覆うよ
うにしたものである。The arc-extinguishing device according to the present invention cuts out a part of the edge of the insulating plate on the side of the opening / closing contact and exposes the leg of the arc-extinguishing plate to the arc at this cutout portion, while it is opposite to the opening / closing contact. The inner part on the side covers the legs of the arc-extinguishing plate as a whole.
この考案においては、絶縁板の切欠きにより露出され
た消弧板脚部の部分はアークと接触してこれを冷却する
一方、絶縁板の切欠いてない部分はアークが開閉接触子
間で消弧板の脚部を伝つて短絡状態で飛ぶのを防止す
る。特に、しや断電流が過負荷電流のように比較的小さ
い場合、消弧板の奥に向けてアークの電磁駆動力が弱い
のであるが、絶縁板の奥の部分は消弧板の脚部の奥の部
分を全体的に覆うため消弧板の奥の方ではアークは消弧
板の脚部に短絡状態で接触、滞留することがなくなり、
従って前記の絶縁板の切欠き部分によるアークの冷却効
果と奥の方におけるアークの滞留防止効果との相乗効果
により小電流のアークの消弧能力が格段に向上する。In this invention, the arc extinguishing plate leg portion exposed by the cutout of the insulating plate comes into contact with the arc to cool it, whereas the arc extinguishes between the switching contacts in the non-cutout portion of the insulating plate. Prevents jumping in short-circuit condition by following the legs of the board. In particular, when the breaking current is relatively small like the overload current, the electromagnetic driving force of the arc is weak toward the back of the arc-extinguishing plate, but the back part of the insulating plate is the leg of the arc-extinguishing plate. Since the back part of the arc-extinguishing plate is entirely covered, the arc does not contact and stay in the legs of the arc-extinguishing plate in a short-circuited state at the back part,
Therefore, the arc extinguishing ability of a small current is remarkably improved by the synergistic effect of the arc cooling effect due to the cutout portion of the insulating plate and the arc retention preventing effect at the inner side.
以下、この考案の一実施例を第1図乃至第3図につい
て説明する。第1図は、この考案の一実施例による回路
しや断器の消弧装置の一部破断斜視図、第2図は第1図
の平面図、第3図は第2図の線III−IIIに沿つた断面図
であり、前記従来のものと同一部分には同一符号を付し
てその説明は省略する。An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a partially broken perspective view of an arc extinguishing device for a circuit breaker and a circuit breaker according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a line III- of FIG. FIG. 3 is a cross-sectional view taken along line III, in which the same parts as those of the conventional one are designated by the same reference numerals and the description thereof is omitted.
図において、(9A)は従来のものの(9)に対応する
絶縁板であつて、無機質材料あるいは樹脂材料とを問わ
ず、適当な絶縁材料からなるものであり、各消弧板(40
1)の奥の部分(404)に形成した突起(405)と両脚部
(403)との間に挿入し突起(405)をかしめることによ
り両脚部(403)に固定されている。In the figure, (9A) is an insulating plate corresponding to (9) of the conventional one, which is made of an appropriate insulating material regardless of whether it is an inorganic material or a resin material.
1) It is fixed to both legs (403) by inserting it between the protrusion (405) formed on the inner part (404) of the rear part (404) and both legs (403) and caulking the protrusion (405).
絶縁板(9A)の開閉接触子(2),(3)側の縁部
(901)はその上部(902)および下部(903)を残して
中央部(904)が切欠かれており、この切欠かれた中央
部(904)において消弧板(401)の両脚部(403)がア
ーク(A)に対して露出されている。上部(902)およ
び下部(903)では両脚部(403)はアーク(A)と接触
しないように絶縁板(9A)で覆われている。また、絶縁
板(9A)の開閉接触子(2),(3)とは反対側の奥の
部分は消弧板(401)の脚部(403)の奥の部分を全体的
に覆っている。The edge portion (901) of the insulating plate (9A) on the side of the opening / closing contacts (2), (3) is notched in the central portion (904) except for the upper portion (902) and the lower portion (903). Both legs (403) of the arc-extinguishing plate (401) are exposed to the arc (A) in the opened central portion (904). Both legs (403) of the upper part (902) and the lower part (903) are covered with an insulating plate (9A) so as not to come into contact with the arc (A). Further, the inner part of the insulating plate (9A) opposite to the opening / closing contacts (2) and (3) covers the inner part of the leg (403) of the arc extinguishing plate (401) as a whole. .
かくして、過負荷電流の如き比較的小さい電流をしや
断した場合には、アーク(A)を消弧装置(4)の奥の
方へ駆動する電磁駆動力が小さく、従つてアーク(A)
は消弧装置(4)の奥の方へ駆動されず、入口部付近に
滞留することが多いのであるが、このように入口部付近
に滞留する間に、露出された脚部(403)と接触して有
効に冷却される。一方、開閉接触子(2),(3)に最
も近くアーク(A)が最も飛びやすい上部(902)と下
部(903)とでは両脚部(403)は絶縁板(9A)によつて
アーク(A)に対して覆われているので、これらの部分
にアーク(A)が飛ぶことはなく、アーク(A)が開閉
接触子(2),(3)間を消弧板(401)の脚部(403)
を伝つてほぼ短絡状態で飛ぶのが防止される。上述のよ
うにしや断電流が過負荷電流のように比較的小さい場合
には、消弧板(401)の奥の方に向けてのアーク(A)
の電磁駆動力が必然的に小さくなるのであるが、消弧板
(401)の奥の方では絶縁板(9A)は消弧板(401)の脚
部(403)を全体的に覆っているので、アークは短絡状
態で脚部(403)に接触、滞留することがなくなる。従
つて、上述した脚部(403)の露出部分との接触による
冷却と、開閉接触子(2),(3)間を脚部(403)を
伝つて短絡状態で飛ぶのが防止されることとが合俟っ
て、アーク(A)は消弧装置(4)の奥の方まで駆動さ
れなくとも消弧されるのである。また、短絡電流のよう
な大電流のしや断時にも消弧板(401)の脚部(403)の
露出部分によるアーク(A)の冷却効果は当然ある駅
で、大電流のしや断性能も向上することは改めて説明す
るまでもない。Thus, when a relatively small current such as an overload current is cut off or turned off, the electromagnetic driving force for driving the arc (A) toward the back of the arc extinguishing device (4) is small, and accordingly, the arc (A).
Is not driven toward the back of the arc-extinguishing device (4) and often stays in the vicinity of the entrance, but while staying in the vicinity of the entrance in this way, the exposed leg (403) Contacted and effectively cooled. On the other hand, in the upper part (902) and the lower part (903) where the arc (A) is the closest to the switching contacts (2) and (3) and the arc (A) is most likely to fly, both legs (403) are connected to the arc (9A) by the insulating plate (9A). Since it is covered with respect to A), the arc (A) does not fly to these parts, and the arc (A) passes between the open / close contacts (2) and (3) and the leg of the arc extinguishing plate (401). Division (403)
It is prevented from flying in a short-circuited state. As described above or when the breaking current is relatively small like the overload current, the arc (A) toward the back of the arc extinguishing plate (401).
Inevitably the electromagnetic driving force of the arc is reduced, but in the inner part of the arc extinguishing plate (401), the insulating plate (9A) entirely covers the legs (403) of the arc extinguishing plate (401). Therefore, the arc is prevented from coming into contact with and staying on the leg (403) in the short-circuited state. Therefore, the cooling due to the contact with the exposed portion of the leg portion (403) described above and the prevention of flying in the short circuit state through the leg portion (403) between the opening / closing contacts (2) and (3) are prevented. Therefore, the arc (A) is extinguished even if it is not driven to the back of the arc extinguishing device (4). In addition, even when a large current such as a short-circuit current is turned on or off, the exposed portion of the legs (403) of the arc extinguishing plate (401) naturally has the effect of cooling the arc (A) at a station. It goes without saying that performance will also improve.
なお、(406)は各消弧板(401)の両脚部(403)に
外向きに形成された突起、(407)は突起(406)に対応
して側部支持板(402)に形成された穴であつて、この
穴(407)に突起(406)を嵌めた後、突起(406)をか
しめることにより、消弧板(401)を間隔を置いた重積
関係に保持するものである。In addition, (406) is a protrusion formed outward on both legs (403) of each arc extinguishing plate (401), and (407) is formed on the side support plate (402) corresponding to the protrusion (406). It is a hole that holds the arc extinguishing plate (401) in a stacking relationship with a gap by fitting the protrusion (406) into the hole (407) and then caulking the protrusion (406). is there.
この考案の他の実施例が第4図に一部破断斜視図で示
されている。この実施例が先の実施例と異なるのは、絶
縁板(9A)の縁部(901)の上部(902)を残して他の部
分、即ち中央部(904)および下部(903)を切欠いた点
である。かくして、上部(902)では消弧板(401)の脚
部(403)は絶縁板(9A)によつてアーク(A)と接触
しないように覆われ、切欠かれた部分はアーク(A)に
対して露出されることになる。この実施例では上部の消
弧板(401)の脚部(403)にアーク(A)が飛ぶことが
なく、アーク(A)は可動接触子(2)の先端部へ移行
しアーク(A)の伸長が促進されると共に脚部(403)
の露出部分が多いためアーク(A)がより良く冷却され
る。Another embodiment of the present invention is shown in FIG. 4 in a partially cutaway perspective view. This embodiment differs from the previous ones in that the upper portion (902) of the edge portion (901) of the insulating plate (9A) is left and the other portions, that is, the central portion (904) and the lower portion (903) are notched. It is a point. Thus, in the upper part (902), the leg portion (403) of the arc extinguishing plate (401) is covered by the insulating plate (9A) so as not to come into contact with the arc (A), and the notched portion becomes the arc (A). Will be exposed. In this embodiment, the arc (A) does not fly to the leg (403) of the upper arc extinguishing plate (401), and the arc (A) moves to the tip of the movable contact (2) and the arc (A). The extension of the legs is promoted and the legs (403)
The arc (A) is cooled better because there are many exposed parts of the arc.
この考案の更に別の実施例が第5図に一部破断斜視図
で示されている。この実施例が先の二つの実施例と異な
るのは、絶縁板(9A)の縁部(901)の下部(903)を残
して他の部分、即ち上部(902)および中央部(904)を
切欠いた点である。かくして、下部(903)では消弧板
(401)の脚部(403)は絶縁板(9A)によつてアーク
(A)と接触しないように覆われ、切欠かれた部分はア
ーク(A)に対して露出されることになる。この実施例
では可動接触子(2)が固定接触子(3)から開離した
直後から固定接触子(3)から下部の脚部(403)に飛
ぶことがなく、アーク(A)はアークランナ(8)に沿
つて消弧装置(4)の奥の方へ駆動されやすく、アーク
(A)の伸長が促進されると共に脚部(403)の露出部
分が多いため、アーク(A)がより良く冷却される。Yet another embodiment of the present invention is shown in FIG. 5 in a partially cutaway perspective view. This embodiment differs from the previous two embodiments in that the lower part (903) of the edge part (901) of the insulating plate (9A) is left and the other parts, namely the upper part (902) and the central part (904) are left. It is a cutout point. Thus, in the lower part (903), the leg portion (403) of the arc extinguishing plate (401) is covered by the insulating plate (9A) so as not to come into contact with the arc (A), and the notched portion becomes the arc (A). Will be exposed. In this embodiment, the movable contact (2) does not fly from the fixed contact (3) to the lower leg (403) immediately after the movable contact (2) is separated from the fixed contact (3), and the arc (A) is an arc runner ( It is easy to drive the arc extinguishing device (4) toward the back along 8), the extension of the arc (A) is promoted, and the exposed portion of the leg (403) is large, so that the arc (A) is better. To be cooled.
更に、この考案の他の実施例が第6図に一部破断斜視
図で示されている。この実施例が先の三つの実施例と異
なるのは、絶縁板(9A)の縁部(901)の中央部(904)
を残して他の部分、即ち上部(902)および下部(903)
を切欠いた点である。かくして、中央部(904)では消
弧板(401)の脚部(403)は絶縁板(9A)によつてアー
ク(A)と接触しないように覆われ、切欠かれた上部
(902)および下部(903)はアーク(A)に対して露出
されることになる。しかして、仮に上部(902)および
下部(903)でアーク(A)が脚部(403)に飛んだとし
てもアーク(A)は中央部(904)においては絶縁板(9
A)によつて阻止されて脚部(403)と接触しえないた
め、絶縁板(9A)の中央部(904)の上あるいはその近
くの空間を通らざるを得ず、アーク(A)の中央部が伸
長され消弧装置(4)の奥の方へ駆動されやすい。な
お、第4図乃至第6図の実施例においても、絶縁板(9
A)の開閉接触子(2),(3)とは反対側の奥の部分
は消弧板(401)の脚部(403)の奥の部分を全体的に覆
っており、それにより、消弧板(401)の奥の部分にお
いてアーク(A)が短絡状態で脚部(403)に接触、滞
留するのを防止しうる効果が得られるのは第1図乃至第
3図の実施例の場合と同様である。Further, another embodiment of the present invention is shown in a partially cutaway perspective view in FIG. This embodiment differs from the previous three embodiments in that the central portion (904) of the edge portion (901) of the insulating plate (9A) is
Leaving the other parts, namely the upper (902) and lower (903)
It is the point that cut out. Thus, in the central portion (904), the leg portion (403) of the arc extinguishing plate (401) is covered by the insulating plate (9A) so as not to come into contact with the arc (A), and the notched upper portion (902) and lower portion (902). (903) will be exposed to the arc (A). Then, even if the arc (A) flies to the leg (403) at the upper part (902) and the lower part (903), the arc (A) at the central part (904) becomes an insulating plate (9).
Since it cannot be contacted with the leg (403) by being blocked by A), it must pass through the space above or near the central portion (904) of the insulating plate (9A), and the arc (A) The central part is extended and easily driven toward the back of the arc extinguishing device (4). In the embodiment of FIGS. 4 to 6, the insulating plate (9
The inner part on the side opposite to the open / close contacts (2) and (3) of (A) entirely covers the inner part of the leg (403) of the arc-extinguishing plate (401), and thus In the inner part of the arc plate (401), the effect of preventing the arc (A) from contacting and staying on the leg portion (403) in a short-circuited state is obtained in the embodiment of FIGS. It is similar to the case.
以上のように、絶縁板(9A)の縁部(901)の一部を
切欠いてこの切欠いた部分において消弧板の脚部(40
3)をアーク(A)に対して露出することにより、アー
ク(A)が開閉接触子(2),(3)間で消弧板(40
1)の脚部(403)を伝つて短絡状態で飛ぶのを防止しつ
つアーク(A)の冷却効果を高めてアーク(A)の消弧
能力を高め、アーク(A)を確実に消弧することができ
るようになるのに加えて、絶縁板(9A)が樹脂材料から
なるものにおいては、切欠いた部分だけ分解ガスの発生
量が少なくなり、分解ガスの発生によるしや断器の急激
な圧力上昇によつてしや断器ケースが破壊される事態が
少なくなる。As described above, a part of the edge portion (901) of the insulating plate (9A) is cut out, and the leg part (40
By exposing 3) to the arc (A), the arc (A) causes the arc extinguishing plate (40) between the open / close contacts (2) and (3).
The arc (A) extinguishing ability is enhanced by increasing the arc (A) cooling effect while preventing the short circuit from flying along the leg (403) of 1), and the arc (A) is surely extinguished. In addition, if the insulating plate (9A) is made of a resin material, the amount of decomposed gas generated is reduced only in the notched parts, and the breakage and breakage caused by the generated decomposed gas will be sharp. There is less chance that the breaker case or the breaker case will be destroyed due to the excessive pressure increase.
なお、前記実施例では接触子の一方は固定接触子
(3)である例を示したが、接触子(2),(3)の両
方が可動な反発形回路しや断器にもこの考案は同様に適
用しうるものである。また、絶縁板の切込みは機械加工
により形成しても良いし、切込みをつけた形状に絶縁板
を成形しても良い。In the above embodiment, one of the contacts is the fixed contact (3), but both the contacts (2) and (3) are movable. Are similarly applicable. Further, the notch of the insulating plate may be formed by machining, or the notch may be formed into the insulating plate.
以上のようにこの考案によれば絶縁板の開閉接触子側
の縁部の一部に切込みをつけるという極めて簡単な構成
により、消弧装置の消弧能力を向上しうる効果が得られ
る。As described above, according to the present invention, the arc extinguishing ability of the arc extinguishing device can be improved by a very simple structure in which a part of the edge of the insulating plate on the side of the opening / closing contact is cut.
第1図はこの考案の一実施例による回路しや断器の消弧
装置の一部破断斜視図、第2図は第1図の平面図、第3
図は第2図の線III−IIIに沿つた断面図、第4図,第5
図および第6図はそれぞれこの考案による回路しや断器
の消弧装置の異なる実施例の部分断面斜視図、第7図は
従来の消弧装置を備えた回路しや断器の部分断面側面
図、第8図は第7図の平面図である。 図において、(2),(3)は開閉接触子、(4)は消
弧装置、(401)は消弧板、(403)は消弧板(401)の
脚部、(9A)は絶縁板、(901)は絶縁板(9A)の開閉
接触子側の縁部、(902)は縁部(901)の上部、(90
3)は下部、(904)は中央部、(A)はアークである。 なお、各図中同一符号は同一部または相当部を示す。1 is a partially cutaway perspective view of an arc extinguishing device for a circuit breaker and a circuit breaker according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG.
The figure is a cross-sectional view along the line III-III in FIG. 2, FIG. 4, and FIG.
FIG. 6 and FIG. 6 are partial sectional perspective views of different embodiments of an arc extinguishing device for a circuit breaker and a circuit breaker according to the present invention, and FIG. 7 is a partial sectional side view of a circuit breaker and a circuit breaker equipped with a conventional arc extinguishing device. 8 and 9 are plan views of FIG. In the figure, (2) and (3) are opening / closing contacts, (4) is an arc extinguishing device, (401) is an arc extinguishing plate, (403) is a leg of the arc extinguishing plate (401), and (9A) is an insulation. Plate, (901) is the edge of the insulating plate (9A) on the side of the open / close contact, (902) is the upper part of the edge (901), (90
3) is the lower part, (904) is the central part, and (A) is the arc. In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (5)
流しや断時に前記開閉接触子間に生じるアークを消弧す
る回路しや断器の消弧装置であって、前記開閉接触子側
に開口したほぼU字形の消弧板を複数枚互いに間隔を置
いて重積関係に保持してなり、前記消弧板の両脚部の内
側に絶縁板を設けて消弧板の両脚部を覆うようにしたも
のにおいて、前記絶縁板の開閉接触子側の縁部を一部切
欠いてこの切欠いた部分において前記消弧板の脚部を前
記アークに対して露出する一方、開閉接触子とは反対側
の奥の部分は前記消弧板の脚部の奥の部分を全体的に覆
うようにしたことを特徴とする回路しや断器の消弧装
置。1. An arc extinguishing device for a circuit or a breaker, which is arranged so as to face a pair of open / close contacts, and which extinguishes an arc generated between the open / close contacts when the current is turned off or turned off. A plurality of substantially U-shaped arc-extinguishing plates that are open to the contact side are held in a stacking relationship at intervals from each other, and insulating plates are provided inside both legs of the arc-extinguishing plate to provide both legs of the arc-extinguishing plate. A part of the insulating plate on the side of the opening / closing contact is notched, and the leg of the arc extinguishing plate is exposed to the arc at the notched part, while the opening / closing contact is made. An arc extinguishing device for a circuit or a breaker, characterized in that the inner part on the side opposite to the above part entirely covers the inner part of the leg of the arc extinguishing plate.
下部を残して中央部を切欠いたことを特徴とする実用新
案登録請求の範囲第1項記載の回路しや断器の消弧装
置。2. The utility model registration as claimed in claim 1, characterized in that the central portion is cut out leaving the upper and lower edge portions of the insulating plate on the side of the opening and closing contacts. Arc device.
て他の部分を切欠いたことを特徴とする実用新案登録請
求の範囲第1項記載の回路しや断器の消弧装置。3. An extinguishing circuit or breaker according to claim 1, characterized in that the upper part of the edge of the insulating plate on the side of the opening / closing contact is left and the other part is notched. apparatus.
て他の部分を切欠いたことを特徴とする実用新案登録請
求の範囲第1項記載の回路しや断器の消弧装置。4. An extinguishing circuit or disconnection arc according to claim 1, characterized in that a lower part of an edge of the insulating plate on the side of the opening / closing contact is left and the other part is notched. apparatus.
して他の部分を切欠いたこととを特徴とする実用新案登
録請求の範囲第1項記載の回路しや断器の消弧装置。5. A utility model registration circuit as claimed in claim 1, characterized in that a central portion of an edge portion of the insulating plate on the side of the opening / closing contact is left and other portions are cut away. Arc extinguishing device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987158995U JPH081551Y2 (en) | 1987-10-15 | 1987-10-15 | Arc breaker for circuit breaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1987158995U JPH081551Y2 (en) | 1987-10-15 | 1987-10-15 | Arc breaker for circuit breaker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0163043U JPH0163043U (en) | 1989-04-24 |
JPH081551Y2 true JPH081551Y2 (en) | 1996-01-17 |
Family
ID=31439814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1987158995U Expired - Lifetime JPH081551Y2 (en) | 1987-10-15 | 1987-10-15 | Arc breaker for circuit breaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH081551Y2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200460487Y1 (en) * | 2011-02-22 | 2012-05-24 | 엘에스산전 주식회사 | Circuit breaker with an arc extinguishing device |
JP6078378B2 (en) * | 2013-03-01 | 2017-02-08 | 株式会社日立産機システム | Circuit breaker |
KR102196740B1 (en) * | 2019-04-05 | 2020-12-30 | 엘에스일렉트릭(주) | Arc extinguishing unit for air circuit breaker for direct current |
-
1987
- 1987-10-15 JP JP1987158995U patent/JPH081551Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0163043U (en) | 1989-04-24 |
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