JPH0212370B2 - - Google Patents
Info
- Publication number
- JPH0212370B2 JPH0212370B2 JP59169391A JP16939184A JPH0212370B2 JP H0212370 B2 JPH0212370 B2 JP H0212370B2 JP 59169391 A JP59169391 A JP 59169391A JP 16939184 A JP16939184 A JP 16939184A JP H0212370 B2 JPH0212370 B2 JP H0212370B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- contact
- fixed
- electrode
- movable
- 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
- 239000012212 insulator Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 210000001015 abdomen Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は、開閉器に関するものであり、もう
少し詳しくいうと、少なくとも１対の接触子が、
アークを冷却する消弧板とともに、絶縁体でなる
包囲体に収納され、かつ、固定接触子にアークラ
ンナが取付けられてなる開閉器に関するものであ
る。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a switch, and more specifically, at least one pair of contacts,
This invention relates to a switch that is housed in an enclosure made of an insulator together with an arc extinguishing plate that cools the arc, and has an arc runner attached to a fixed contact.
第１図および第２図は従来のこの種の開閉器を
示し、対向配置された固定電極１および可動電極
２に、それぞれ固定接点３および可動接点４が取
着されていて、１対の接触子を構成している。操
作機構部５には可動電極２の基端が結合されてい
て、可動電極２が回動動作される。電極１，２の
近傍には、接点３，４間に生じるアークを冷却す
るための消弧板６が配設されている。包囲体７は
絶縁体でなり、開閉器の動作部分を収納してい
る。包囲体７には、アークあるいはホツトガスの
排出口８が設けられている。固定電極１にはアー
クランナ９が取付けられている。
FIGS. 1 and 2 show a conventional switch of this type, in which a fixed electrode 1 and a movable electrode 2 are respectively attached to a fixed contact 3 and a movable contact 4, and a pair of contact constitutes a child. The base end of the movable electrode 2 is coupled to the operating mechanism section 5, and the movable electrode 2 is rotated. An arc extinguishing plate 6 is disposed near the electrodes 1 and 2 to cool the arc generated between the contacts 3 and 4. The enclosure 7 is made of an insulator and houses the operating parts of the switch. The enclosure 7 is provided with an arc or hot gas outlet 8. An arc runner 9 is attached to the fixed electrode 1.
以上の構成により、いま、第３図に示すように
可動接点４が固定接点３に接触していると、電力
は、電源から固定電極１→固定接点３→可動接点
４→可動電極２と経由し、負荷側へ供給される。
この状態のとき、短絡電流のような大電流が接触
子間に流れると、操作機構部５が動作して可動接
点４を固定接点３から開離させる。このとき、第
４図および第５図に示すように、固定接点３と可
動接点４との間にはアークＡが発生し、固定接点
３と可動接点４間にアーク電圧があらわれる。こ
のアーク電圧は、固定接点３に対する可動接点４
の開離距離が増大するに伴つて上昇する。また、
同時に、アークＡは消弧板６側へ磁気力によつて
引付けられて伸長するので、アーク電圧はさらに
上昇する。そうして、アーク電流の電流零点を迎
えてアークＡが消弧され、電流が遮断される。 With the above configuration, when the movable contact 4 is now in contact with the fixed contact 3 as shown in FIG. and is supplied to the load side.
In this state, when a large current such as a short-circuit current flows between the contacts, the operating mechanism section 5 operates to separate the movable contact 4 from the fixed contact 3. At this time, as shown in FIGS. 4 and 5, an arc A is generated between the fixed contact 3 and the movable contact 4, and an arc voltage appears between the fixed contact 3 and the movable contact 4. This arc voltage is applied to the movable contact 4 relative to the fixed contact 3.
increases as the separation distance increases. Also,
At the same time, the arc A is drawn toward the arc-extinguishing plate 6 by the magnetic force and extends, so that the arc voltage further increases. Then, the arc current reaches its zero point, the arc A is extinguished, and the current is interrupted.
以上の動作を、電流遮断時を示す第５図によつ
て、さらに詳しく考察すると、可動電極２は回動
中心１０を中心として回動動作し、開極する。こ
の開極動作において、可動電極２と固定電極１の
間の空間的距離は、可動電極２の腹部２ａと固定
電極１の先端部１ａ間の距離がもつとも短い。一
方、可動接点４と固定接点３の間に生じたアーク
Ａは、固定電極１を流れる電流I1と可動電極２を
流れる電流I2から電磁力を受け、その合成力とし
て矢印Ｆの方向の力を受ける。しかし、この電磁
力は、電極構造が、第３図のように閉成時に電流
が直線状に流れるものであるため比較的小さく、
したがつて、一般には、アークＡは可動電極２の
開極動作に伴い、可動接点４と固定接点３の間の
位置から、可動電極２の腹部２ａと固定電極１の
先端部１ａの間の短い距離の位置に移動し、そこ
で停滞する。そのため、図において、接点３，４
よりも右側に位置する消弧板６にアークＡが接触
せず、アークＡが冷却されないこととなり、所望
の遮断性能が得られないという問題があつた。 Considering the above operation in more detail with reference to FIG. 5, which shows the state when the current is cut off, the movable electrode 2 rotates about the rotation center 10 and opens. In this electrode opening operation, the spatial distance between the movable electrode 2 and the fixed electrode 1 is shorter than the distance between the abdomen 2a of the movable electrode 2 and the tip 1a of the fixed electrode 1. On the other hand, the arc A generated between the movable contact 4 and the fixed contact 3 receives an electromagnetic force from the current I 1 flowing through the fixed electrode 1 and the current I 2 flowing through the movable electrode 2, and as a resultant force, the arc A generates in the direction of arrow F. Receive power. However, this electromagnetic force is relatively small because the electrode structure allows current to flow linearly when closed as shown in Figure 3.
Therefore, in general, as the movable electrode 2 opens, the arc A moves from a position between the movable contact 4 and the fixed contact 3 to between the abdomen 2a of the movable electrode 2 and the tip 1a of the fixed electrode 1. Move to a short distance and stay there. Therefore, in the figure, contacts 3 and 4
There was a problem in that the arc A did not come into contact with the arc extinguishing plate 6 located on the right side, and the arc A was not cooled, making it impossible to obtain the desired interrupting performance.
また、上述したように、特に腹部２ａと先端部
１ａ間の距離が短いものでなくても、アーク経路
が、固定接点３と可動接点４の間の距離がもつと
も短い構造のものが多く、この場合はアークＡが
接点３，４間に停滞する。そうして、アークＡは
消弧板６による冷却は受けられても、接点上のア
ークの停滞による接点消耗が助長され、開閉器遮
断容量の格上げに関して重大な支障を来たしてい
た。 Furthermore, as described above, even if the distance between the abdomen 2a and the tip 1a is not particularly short, there are many structures in which the arc path is short even if the distance between the fixed contact 3 and the movable contact 4 is short. In this case, arc A stagnates between contacts 3 and 4. In this way, even though the arc A was cooled by the arc extinguishing plate 6, contact wear was promoted due to the stagnation of the arc on the contact, which caused a serious problem in upgrading the breaking capacity of the switch.
この発明は、以上のような従来の開閉器にあつ
た欠点を解消することを目的とし、固定接点より
電源側の一部が、固定接点取着面よりも可動接点
側の反対側に凹とした固定電極と、中央部に切欠
き溝を形成したアークランナとにより、アークの
足の電流零点における位置を制御し、消弧板の冷
却効果を効果的に発揮させることによる遮断性能
の向上および接点消弧の軽減を具現しうる開閉器
を提供する。
The purpose of this invention is to solve the above-mentioned drawbacks of conventional switches, and the part of the power supply side of the fixed contact is recessed on the opposite side of the movable contact side from the fixed contact mounting surface. The fixed electrode and the arc runner with a notched groove in the center control the position of the arc foot at the current zero point and effectively utilize the cooling effect of the arc extinguishing plate to improve breaking performance and improve the contact point. A switch capable of reducing arc extinction is provided.
第６図はこの発明の一実施例を示し、固定電極
１１には、固定接点１３より電源側の位置におい
て、固定接点１３の取着面１１ａよりも下方へ、
すなわち可動接点側と反対側へ凹とした凹部１１
ｂが形成されている。アークランナ１９はほぼ横
Ｕ字状をなし、その下辺１９ａと上辺１９ｂにわ
たつて先端中央部に切欠き溝１９ｃが形成されて
おり、下辺１９ａが固定電極１１の凹部１１ｂの
底に締着部材２０によつて固定されている。固定
接点１３は切欠き溝１９ｃに囲まれ、切欠き溝１
９ｃの上面に臨んで位置している。
FIG. 6 shows an embodiment of the present invention, in which the fixed electrode 11 has, at a position closer to the power source than the fixed contact 13, a lower part than the mounting surface 11a of the fixed contact 13.
In other words, the recess 11 is recessed toward the side opposite to the movable contact side.
b is formed. The arc runner 19 has a substantially horizontal U-shape, and a cutout groove 19c is formed at the center of the tip extending between the lower side 19a and the upper side 19b. It is fixed by. The fixed contact 13 is surrounded by a notch groove 19c, and the notch groove 1
It is located facing the top of 9c.
次に動作について、第７図、第８図および第９
図により説明する。 Next, regarding the operation, Fig. 7, Fig. 8, and Fig. 9
This will be explained using figures.
第７図は開閉器の閉成時における電極部を示
し、可動電極１２を延長した先端部１２ａの一部
がアークランナ１９の切欠き溝１９ｃと重なり合
つている。矢印は電流の方向を示している。 FIG. 7 shows the electrode portion when the switch is closed, and a portion of the tip portion 12a, which is an extension of the movable electrode 12, overlaps the notch groove 19c of the arc runner 19. Arrows indicate the direction of current flow.
第８図は電流遮断動作における接触子の開極初
期の態様を示し、開極とともに固定接点１３と可
動接点１４間に生じたアークＡは、固定接点１３
と可動接点１４間にしばらくは膠着している。 FIG. 8 shows the initial state of opening of the contact during the current interrupting operation.
and the movable contact 14 are stuck together for a while.
開極が進行し、固定接点１３と可動接点１４間
の距離よりもアークランナ１９と可動電極１２の
先端部１２ａ間の距離が短くなると、第９図に示
すように、アークＡは即座に、アークランナ１９
と可動電極１２の先端部１２ａとの間に移動す
る。このとき、先端部１２ａは可動接点１４の位
置から延長されてアークホーンを形成しているた
め、アークＡは、第９図のように移動すれば可動
接点１４から遠ざかるので、可動接点１４のアー
クによる消耗が、従来の構成のものに比べて著し
く減少することになる。 As the electrode opening progresses and the distance between the arc runner 19 and the tip 12a of the movable electrode 12 becomes shorter than the distance between the fixed contact 13 and the movable contact 14, the arc A immediately moves to the arc runner as shown in FIG. 19
and the tip 12a of the movable electrode 12. At this time, since the tip portion 12a is extended from the position of the movable contact 14 to form an arc horn, the arc A moves away from the movable contact 14 as shown in FIG. This results in significantly reduced wear and tear compared to conventional configurations.
また、Ｕターン形状のアークランナ１９によ
り、アークＡがアークランナ１９に転移したのち
は、アークランナ１９を通る電流によつてアーク
Ａが電磁反発力を受ける。この反発力は、第９図
において接点１３，１４より右方向に作用し、ア
ークＡを消弧板へ導くことになり、したがつて、
アークＡは十分に冷却される。 Further, after the arc A is transferred to the arc runner 19 by the U-turn shaped arc runner 19, the arc A is subjected to electromagnetic repulsion by the current passing through the arc runner 19. This repulsive force acts to the right from the contacts 13 and 14 in FIG. 9, leading the arc A to the arc extinguishing plate, and therefore,
Arc A is sufficiently cooled.
次に、固定接点１３と可動接点１４の間から可
動電極１２の先端部１２ａとアークランナ１９の
間へアークＡが転移するタイミングは、固定電極
１１の形状に大きく依存する。この実施例のよう
に、固定電極１１に凹部１１ｂを形成したことに
より、凹部１１ｂの部分を流れる電流は、第８図
において、アークＡを左方へ押し込む方向に作用
する。したがつて、この力はアークＡが可動電極
１２の先端部１２ａへ転移するのを妨げる力とな
るから、電流通路、すなわち凹部１１ｂの底辺の
位置を固定接点１３から遠ざけるほど、換言すれ
ば凹部１１ｂが深いほどアークＡの転移が促進さ
れる。 Next, the timing at which the arc A transfers from between the fixed contact 13 and the movable contact 14 to between the tip 12a of the movable electrode 12 and the arc runner 19 largely depends on the shape of the fixed electrode 11. Since the recess 11b is formed in the fixed electrode 11 as in this embodiment, the current flowing through the recess 11b acts in a direction that pushes the arc A to the left in FIG. Therefore, since this force becomes a force that prevents the arc A from transferring to the tip 12a of the movable electrode 12, the farther the current path, that is, the bottom of the recess 11b is from the fixed contact 13, the more the recess becomes The deeper 11b is, the more the transition of arc A is promoted.
第１０図は他の実施例を示し、可動電極１２の
先端部１２ａに、下方へ突出する突出部１２ｂを
形成してなるものである。 FIG. 10 shows another embodiment, in which a protrusion 12b that protrudes downward is formed on the tip 12a of the movable electrode 12.
以上の構成においては、接触子の閉成時には、
第１０図のように、突出部１２ｂがアークランナ
１９の切欠き溝１９ｃの一部と重なり合つてい
る。接触子の開極時には、第１１図のように、突
出部１２ｂとアークランナ１９の一部の間にアー
クＡが転移する。このときアークＡの足は突出部
１２ｂに集中し、アークによる可動接点１４の消
耗は、さらに軽減される。 In the above configuration, when the contactor is closed,
As shown in FIG. 10, the protrusion 12b partially overlaps the notch 19c of the arc runner 19. When the contact is opened, the arc A is transferred between the protrusion 12b and a part of the arc runner 19, as shown in FIG. At this time, the legs of the arc A are concentrated on the protrusion 12b, and the wear and tear on the movable contact 14 due to the arc is further reduced.
なお、接触子が１対のものに限らず、複数対で
あつても同様である。 Note that the present invention is not limited to one pair of contacts, and the same applies even if there are multiple pairs of contacts.
以上の説明から明らかなように、この発明は、
固定電極に凹部を形成し、固定電極に装置するア
ークランナの切欠き溝に固定接点を臨ましめた構
成により、さらには、可動電極の先端を延長して
アークホーンを形成した構成により、遮断性能の
すぐれた、接点消耗の少ない開閉器を具現するこ
とができる。
As is clear from the above explanation, this invention
By forming a recess in the fixed electrode and exposing the fixed contact to the notch groove of the arc runner installed in the fixed electrode, and by extending the tip of the movable electrode to form an arc horn, the breaking performance is improved. It is possible to realize a switch with excellent characteristics and low contact wear.
第１図〜第５図は従来の開閉器を示し、第１図
は一部断面平面図、第２図は第１図の−線に
沿う平面での断面図、第３図は要部側面図、第４
図は動作説明のための一部断面側面図、第５図は
動作説明のための要部側面図である。第６図〜第
９図はこの発明の一実施例を示し、第６図は要部
斜視図、第７図〜第９図はそれぞれ動作説明のた
めの要部側面図である。第１０図および第１１図
は他の実施例を示し、第１０図は要部側面図、第
１１図は動作説明のための要部側面図である。
５……操作機構部、６……消弧板、７……包囲
体、１１……固定電極、１１ｂ……凹部、１２…
…可動電極、１２ａ……先端部、１２ｂ……突出
部、１３……固定接点、１４……可動接点、１９
……アークランナ、１９ｃ……切欠き溝。なお、
各図中、同一符号は同一又は相当部分を示す。
Figures 1 to 5 show a conventional switch. Figure 1 is a partially sectional plan view, Figure 2 is a sectional view taken along the - line in Figure 1, and Figure 3 is a side view of the main part. Figure, 4th
The figure is a partially sectional side view for explaining the operation, and FIG. 5 is a side view of the main part for explaining the operation. 6 to 9 show an embodiment of the present invention, with FIG. 6 being a perspective view of the main part, and FIGS. 7 to 9 being side views of the main part for explaining the operation. 10 and 11 show other embodiments, FIG. 10 is a side view of the main part, and FIG. 11 is a side view of the main part for explaining the operation. 5... Operation mechanism section, 6... Arc-extinguishing plate, 7... Encircling body, 11... Fixed electrode, 11b... Recessed part, 12...
...Movable electrode, 12a...Tip, 12b...Protrusion, 13...Fixed contact, 14...Movable contact, 19
...Arc runner, 19c...Notch groove. In addition,
In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
閉成時に電流経路がほぼ直線状になるように配置
された固定電極および可動電極と、アークを冷却
する消弧板と、前記固定電極に取付けられたアー
クランナと、これらを収納している絶縁体でなる
包囲体とを備えた開閉器において、 前記固定接点よりも電源側の部位であつて、前
記固定接点の取着面に対し前記可動接点と反対側
に凹部が形成されている前記固定電極と、 横Ｕ字状をなして下辺が前記凹部の底に固定さ
れ、前記下辺と上辺にわたつて先端中央部に前記
固定接点が臨む切欠き溝が形成されている前記ア
ークランナと、 を備えてなることを特徴とする開閉器。 ２ 閉成時に切欠き溝と重なり合うアークホーン
が先端部に形成された可動電極を備えた特許請求
の範囲第１項記載の開閉器。[Scope of Claims] 1. A fixed electrode and a movable electrode to which a fixed contact and a movable contact are respectively attached and arranged so that a current path becomes approximately straight when closed; an arc extinguishing plate for cooling an arc; In a switch equipped with an arc runner attached to a fixed electrode and an enclosure made of an insulator that houses these, a part on the power supply side of the fixed contact, and on the mounting surface of the fixed contact. On the other hand, the fixed electrode has a recess formed on the side opposite to the movable contact, the lower side is fixed to the bottom of the recess in a horizontal U-shape, and the fixed electrode is connected to the central part of the tip across the lower side and the upper side. A switch comprising: the arc runner having a notched groove facing the arc runner; 2. The switch according to claim 1, comprising a movable electrode having a tip portion formed with an arc horn that overlaps the notch groove when closed.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59169391A JPS6149338A (en) | 1984-08-15 | 1984-08-15 | Switch |
| FR858506594A FR2569304B1 (en) | 1984-08-15 | 1985-04-30 | CIRCUIT SWITCH |
| ZA853436A ZA853436B (en) | 1984-08-15 | 1985-05-07 | Circuit interrupter |
| US06/732,071 US4642428A (en) | 1984-08-15 | 1985-05-09 | Circuit interrupter |
| CH2096/85A CH677045A5 (en) | 1984-08-15 | 1985-05-15 | |
| GB08514651A GB2163293B (en) | 1984-08-15 | 1985-06-10 | Circuit-breaker arc control |
| IT67560/85A IT1199890B (en) | 1984-08-15 | 1985-06-14 | SWITCH FOR LOW VOLTAGE ELECTRIC CIRCUITS |
| IT5351385U IT8553513V0 (en) | 1984-08-15 | 1985-06-14 | SWITCH FOR LOW VOLTAGE ELECTRIC CIRCUITS |
| KR1019850004257A KR890003377B1 (en) | 1984-08-15 | 1985-06-15 | Circuit interrupter |
| DE19853528196 DE3528196A1 (en) | 1984-08-15 | 1985-08-06 | DISCONNECTOR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59169391A JPS6149338A (en) | 1984-08-15 | 1984-08-15 | Switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6149338A JPS6149338A (en) | 1986-03-11 |
| JPH0212370B2 true JPH0212370B2 (en) | 1990-03-20 |
Family
ID=15885726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59169391A Granted JPS6149338A (en) | 1984-08-15 | 1984-08-15 | Switch |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6149338A (en) |
| ZA (1) | ZA853436B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799369B (en) * | 2017-11-30 | 2020-01-10 | 厦门理工学院 | Ablation-resistant static contact assembly and arc extinguishing system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814441A (en) * | 1981-07-17 | 1983-01-27 | 三菱電機株式会社 | Circuit breaker |
| JPS5828151A (en) * | 1981-08-12 | 1983-02-19 | 三菱電機株式会社 | Circuit breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5431874Y2 (en) * | 1974-10-11 | 1979-10-04 |
-
1984
- 1984-08-15 JP JP59169391A patent/JPS6149338A/en active Granted
-
1985
- 1985-05-07 ZA ZA853436A patent/ZA853436B/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814441A (en) * | 1981-07-17 | 1983-01-27 | 三菱電機株式会社 | Circuit breaker |
| JPS5828151A (en) * | 1981-08-12 | 1983-02-19 | 三菱電機株式会社 | Circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6149338A (en) | 1986-03-11 |
| ZA853436B (en) | 1985-12-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |