JPH0236204Y2 - - Google Patents
Info
- Publication number
- JPH0236204Y2 JPH0236204Y2 JP1984034282U JP3428284U JPH0236204Y2 JP H0236204 Y2 JPH0236204 Y2 JP H0236204Y2 JP 1984034282 U JP1984034282 U JP 1984034282U JP 3428284 U JP3428284 U JP 3428284U JP H0236204 Y2 JPH0236204 Y2 JP H0236204Y2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- fixed
- contact
- conductor
- 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
Links
- 239000004020 conductor Substances 0.000 claims description 29
- 238000009413 insulation Methods 0.000 description 6
- 230000006866 deterioration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000002923 metal particle Substances 0.000 description 3
- 239000010953 base metal Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Breakers (AREA)
Description
【考案の詳細な説明】 〔考案の技術分野〕 この考案は回路しや断器に関するものである。[Detailed explanation of the idea] [Technical field of invention] This invention relates to circuits and disconnectors.
第1図〜第3図は従来の回路しや断器を示す部
分断面図で、それぞれに異なつた動作状態を示し
ている。
1 to 3 are partial cross-sectional views of conventional circuits and disconnectors, each showing different operating states.
同図において、1は容器を構成している筐体、
2は固定接触子で、その固定導体3の一端には固
定接点4を有し、他端は外部導体(図示せず)に
接続されるように端子ねじ5が設けられている。
6は可動接触子で、その可動導体7の先端には固
定接点4に対向した可動接点8を有している。9
は操作機構であり、上記筐体1の上面より突出し
ているハンドル10の操作により可動接触子6を
動作させて固定接点4と可動接点8とを第1図の
ような閉極状態もしくは第2図のような開極状態
に動作させたり、あるいは過電流引外し装置11
の作用により第1図の閉極状態より第3図に示す
開極状態に自動的に動作させるものである。 In the figure, 1 is a casing that constitutes a container;
A fixed contact 2 has a fixed contact 4 at one end of a fixed conductor 3, and a terminal screw 5 is provided at the other end so as to be connected to an external conductor (not shown).
A movable contact 6 has a movable contact 8 at the tip of a movable conductor 7 facing the fixed contact 4. 9
1 is an operating mechanism, which operates a movable contact 6 by operating a handle 10 protruding from the top surface of the housing 1, and places the fixed contact 4 and the movable contact 8 in the closed state as shown in FIG. 1 or in the second state. Operate in the open state as shown in the figure, or overcurrent trip device 11
By this action, the closed state shown in FIG. 1 is automatically changed to the open state shown in FIG. 3.
12は外部導体(図示せず)に接続されるよう
に端子ねじ13を設けた接続導体であり、而して
電路は固定導体3−固定接点4−可動接点8−可
動導体7−過電流引き外し装置11−接続導体1
2のように形成される。いま第1図の閉極状態に
おいて過電流が流れると、過電流引き外し装置1
1が作用して操作機構9の動作により、可動導体
7が動き開極して電流をしや断するものである。
14は消弧板、15は筐体1に設けられた排気孔
である。 Reference numeral 12 denotes a connecting conductor provided with a terminal screw 13 so as to be connected to an external conductor (not shown), and the electrical path is fixed conductor 3 - fixed contact 4 - movable contact 8 - movable conductor 7 - overcurrent draw. Removal device 11 - connection conductor 1
It is formed like 2. If an overcurrent flows in the closed state shown in Fig. 1, the overcurrent tripping device 1
1 acts and the operation of the operating mechanism 9 causes the movable conductor 7 to move and open, thereby cutting off the current.
14 is an arc extinguishing plate, and 15 is an exhaust hole provided in the housing 1.
つぎに、回路しや断器が電流しや断時に発生す
るアークの振舞いについて説明する。 Next, the behavior of the arc that occurs when the circuit or breaker interrupts the current flow will be explained.
いま、可動接点8と固定接点4とが接触してい
る場合においては、その電力は電源側より固定導
体3、固定接点4、可動接点8および可動導体7
を経由して負荷側へ供給される。この状態におい
て短絡電流等の大電流がこの回路へ流れると、前
述したように可動接点8が固定接点4から開離さ
れる。この際、上記固定および可動接点4,8間
にはアーク16(第4図)が発生し、固定および
可動接点4,8間にはアーク電圧が発生する。こ
のアーク電圧は、固定接点4からの可動接点8の
開離距離が増大するに従つて上昇し、また、同時
にアーク16が消弧板14の方向へ磁気力によつ
て引きつけられ伸長するため、さらに上昇する。 Now, when the movable contact 8 and the fixed contact 4 are in contact, the power is transferred from the power source to the fixed conductor 3, the fixed contact 4, the movable contact 8, and the movable conductor 7.
is supplied to the load side via. When a large current such as a short circuit current flows into this circuit in this state, the movable contact 8 is separated from the fixed contact 4 as described above. At this time, an arc 16 (FIG. 4) is generated between the fixed and movable contacts 4 and 8, and an arc voltage is generated between the fixed and movable contacts 4 and 8. This arc voltage increases as the separation distance of the movable contact 8 from the fixed contact 4 increases, and at the same time, the arc 16 is attracted and expanded in the direction of the arc extinguishing plate 14 by magnetic force. It rises further.
このようにして、アーク電流は電流零点を迎え
てアーク16を消弧し、しや断が完結する。この
ようなしや断動作中において、可動接点8と固定
接点4との間には、アーク16によつて短時間、
すなわち数ミリ秒のうちに大量のエネルギーが発
生する。そのために、筐体1内の気体の温度は上
昇し、かつ圧力も急激に上昇するが、この高温高
圧の気体は上記筐体に形成された排気孔15より
大気中に放出される。 In this way, the arc current reaches a current zero point and the arc 16 is extinguished, completing the shearing. During such disconnection and disconnection operations, the arc 16 causes a short period of time between the movable contact 8 and the fixed contact 4.
In other words, a large amount of energy is generated within a few milliseconds. Therefore, the temperature of the gas inside the housing 1 rises and the pressure also rises rapidly, but this high-temperature, high-pressure gas is released into the atmosphere from the exhaust hole 15 formed in the housing.
上記のような回路しや断器の動作において、一
般にアーク抵抗Rはつぎのような式で与えられ
る。すなわち、
R=ρ/S
ただし、R:アーク抵抗(Ω)
ρ:アーク抵抗率(Ω・cm)
:アーク長さ(cm)
S:アーク断面積(cm2)
しかるに、一般に数kA以上の大電流でかつア
ーク長さが50mm以下の短いアーク16において
は、アーク空間は金属粒子によつて占められてし
まうものである。しかも、この金属粒子の放出
は、接点表面に直角方向に起こるものである。ま
た、この放出された金属粒子は、放出時において
は接点の金属の沸点近くの温度を有し、さらにア
ーク空間に注入されるや否や電気的エネルギーの
注入を受けて高温高圧化される。そしてこのアー
ク16は第4図に示すように固定接点4と可動接
点8の空間に広がりを見せる。 In the operation of a circuit or disconnector as described above, arc resistance R is generally given by the following formula. In other words, R = ρ/S where R: arc resistance (Ω) ρ: arc resistivity (Ω・cm): arc length (cm) S: arc cross-sectional area (cm 2 ) However, generally large scales of several kA or more In a short arc 16 with a current and an arc length of 50 mm or less, the arc space is occupied by metal particles. Moreover, this release of metal particles occurs in a direction perpendicular to the contact surface. Further, the ejected metal particles have a temperature near the boiling point of the metal at the contact point at the time of ejection, and furthermore, as soon as they are injected into the arc space, they are heated to high temperature and high pressure by being injected with electrical energy. As shown in FIG. 4, this arc 16 spreads into the space between the fixed contact 4 and the movable contact 8.
このような状況下に上記接点4,8が長時間さ
らされると、接点4,8の溶融や筐体1の内部壁
面の焼損による絶縁抵抗の劣化を招くことにな
る。このため、第5図A,Bに示すように上記固
定導体3の先端にアークランナ17を配設するこ
とが実施されている。これは上記接点4,8間に
生じたアーク16の上記固定接点4側の足を速か
にアークランナ17に移行させることにより、ア
ーク16を速かに消弧板14に吸引しやすくする
ことを主目的としている。 If the contacts 4 and 8 are exposed to such conditions for a long time, the contacts 4 and 8 will melt and the inner wall surface of the casing 1 will be burnt out, resulting in deterioration of the insulation resistance. For this reason, an arc runner 17 is disposed at the tip of the fixed conductor 3 as shown in FIGS. 5A and 5B. This is to quickly transfer the leg of the arc 16 generated between the contacts 4 and 8 on the fixed contact 4 side to the arc runner 17, thereby making it easier to quickly attract the arc 16 to the arc extinguishing plate 14. It is the main purpose.
しかるに上記のものは、アークの転位が速やか
に行なわれず、前述の欠点、すなわち、接点4,
8の溶融や筐体1の絶縁抵抗の劣化を生じ易い欠
点があつた。 However, in the above method, the arc dislocation does not occur quickly, and the above-mentioned drawbacks occur, namely, the contact points 4,
However, there were drawbacks such as melting of the casing 8 and deterioration of the insulation resistance of the casing 1.
また、他の従来例として、たとえば実公昭52−
20348号に開示されているように、固定接点の端
子板(固定導体)に、グリツド(消弧板)に固定
された板バネを弾性的に接触させることにより、
固定接点と可動接点との接触圧を安定化させるも
のが知られている。 In addition, as another conventional example, for example,
As disclosed in No. 20348, by elastically contacting the terminal plate (fixed conductor) of a fixed contact with a leaf spring fixed to a grid (arc extinguishing plate),
There are known devices that stabilize the contact pressure between a fixed contact and a movable contact.
ところが、この従来例では、端子板はグリツド
と離間しているため、アークの転位が速やかに行
われない。つまり、上記端子板に接触する板バネ
は、端子板の固定接点とは反対面に設けられてお
り、アークをグリツド側に導く構成となつていな
い。このため、両接点間で生じたアークは消弧さ
れにくく、上記第1図の従来例と同様に、やはり
両接点の消耗や筐体の絶縁抵抗の劣化を生じると
いう欠点があつた。 However, in this conventional example, since the terminal plate is separated from the grid, the arc does not displace quickly. That is, the leaf spring that contacts the terminal plate is provided on the opposite side of the terminal plate from the fixed contact, and is not configured to guide the arc toward the grid. For this reason, the arc generated between both contacts is difficult to extinguish, and as with the conventional example shown in FIG. 1, there are also disadvantages in that both contacts are worn out and the insulation resistance of the casing is deteriorated.
[考案の概要]
この考案は上記従来の課題に鑑みてなされたも
ので、固定導体の先端に固着したアークランナの
自由端部を、可動接触子の先端の動作軌跡に近づ
くように延出するとともに、その自由端部を固定
導体に最も近い消弧板に接触させることにより、
接点の消耗と筐体の絶縁劣化を防止し、しや断性
能の向上を図ることができる回路しや断器を提供
することを目的とする。[Summary of the invention] This invention was made in view of the above-mentioned conventional problems, and it extends the free end of the arc runner fixed to the tip of the fixed conductor so as to approach the operating locus of the tip of the movable contact. , by touching its free end to the arc-extinguishing plate closest to the fixed conductor.
It is an object of the present invention to provide a circuit breaker that can prevent wear of contacts and deterioration of insulation of a casing, and improve disconnection performance.
[考案の実施例]
第6図はこの考案に係る回路しや断器の一例を
示すもので、第1図ないし第5図A,Bと同一箇
所には同一符号を付して説明を省略する。[Embodiment of the invention] Fig. 6 shows an example of a circuit breaker according to this invention, and the same parts as in Figs. 1 to 5 A and B are given the same reference numerals and explanations are omitted. do.
同図において、2は固定接触子であり、固定導
体3およびリベツト状の台金21に固着された接
点4からなる。 In the figure, reference numeral 2 denotes a fixed contact, which consists of a fixed conductor 3 and a contact 4 fixed to a rivet-shaped base metal 21.
22はアークランナであり、上記固定導体3の
先端に第7図のように接点4の台金21によりか
しめ付けられている。このアークランナ22は、
その自由端部がL字状に折り曲げられ、その自由
端部の先端は、可動導体7の先端の移動する動作
軌跡(第6図の一点鎖線Aで示す。)と狭い間隙
(約1mm)をもつて略平行するように延出されて、
固定導体3に最も近い消弧板14と接触してい
る。 Reference numeral 22 denotes an arc runner, which is caulked to the tip of the fixed conductor 3 by the base metal 21 of the contact 4 as shown in FIG. This arc runner 22 is
Its free end is bent into an L-shape, and the tip of the free end forms a narrow gap (approximately 1 mm) between the locus of movement of the tip of the movable conductor 7 (indicated by the dashed line A in FIG. 6). The two extend substantially parallel to each other,
It is in contact with the arc extinguishing plate 14 closest to the fixed conductor 3.
つぎに、上記構成の動作について説明する。固
定および可動接触子2,6の開閉動作そのものは
従来のものと同じであり、説明を省略する。 Next, the operation of the above configuration will be explained. The opening/closing operations of the fixed and movable contacts 2 and 6 are the same as those of the prior art, and their explanation will be omitted.
上記可動接触子6の開極動作にともなつて、接
点4,8間には第8図Aのようにアーク16が発
生する。このアーク16は消弧板14の磁気力、
あるいは固定導体3を流れる電流の電磁力によ
り、消弧板14の方向に伸張されはじめるが、こ
の際、アークランナ22が前述のように設けられ
ているので、固定接点4上のアークスポツトは極
めて早くアークランナ22上に移動し、さらに固
定導体3に最も近い消弧板14上に移動する。ア
ーク16は第8図Bに示すように最も近い消弧板
14と可動接点8の間に生じ、アークスポツトの
位置が最も近い消弧板14上になることによつ
て、アーク16は消弧板14の磁気力を強く受
け、極めて早く引きつけられて伸張され第8図C
に示すようにアーク長が長くなる。このあと、電
流零点でアーク電圧が上昇してアーク16は消弧
されてしや断が完結する。 With the opening operation of the movable contactor 6, an arc 16 is generated between the contacts 4 and 8 as shown in FIG. 8A. This arc 16 is caused by the magnetic force of the arc extinguishing plate 14,
Alternatively, due to the electromagnetic force of the current flowing through the fixed conductor 3, it begins to extend in the direction of the arc extinguishing plate 14, but at this time, since the arc runner 22 is provided as described above, the arc spot on the fixed contact 4 is quickly removed. It moves onto the arc runner 22 and then onto the arc extinguishing plate 14 closest to the fixed conductor 3. The arc 16 is generated between the nearest arc extinguishing plate 14 and the movable contact 8 as shown in FIG. It is strongly affected by the magnetic force of the plate 14, and is attracted and stretched extremely quickly, as shown in Fig. 8C.
The arc length becomes longer as shown in . Thereafter, the arc voltage increases at the current zero point, the arc 16 is extinguished, and the burnout is completed.
ここで、固定導体3の先端にアークランナ22
を固着し、かつアークランナ22の自由端部を、
上記固定導体3に最も近い消弧板14に接触させ
たから、上記接点4,8間に生じたアーク16が
アークランナ22を経て消弧板14へ極めて早急
に移行するため、接点4の消耗が軽減され、また
アーク16が極めて早く消弧板14へ吸引され筐
体1の内部にて操作機構9にアーク16が近づく
ことが少なくなるため、絶縁抵抗の劣化が少なく
なり、またアーク16が極めて早く消弧板14に
吸引されるので、アーク16の伸張状態が大き
く、したがつてしや断性に優れたものとなる。 Here, an arc runner 22 is attached to the tip of the fixed conductor 3.
and the free end of the arc runner 22,
Since the fixed conductor 3 is brought into contact with the arc-extinguishing plate 14 closest to it, the arc 16 generated between the contacts 4 and 8 is transferred very quickly to the arc-extinguishing plate 14 via the arc runner 22, reducing wear and tear on the contact 4. In addition, since the arc 16 is attracted to the arc extinguishing plate 14 very quickly and the arc 16 is less likely to approach the operating mechanism 9 inside the housing 1, deterioration of insulation resistance is reduced, and the arc 16 is drawn very quickly to the arc extinguishing plate 14. Since the arc 16 is attracted by the arc extinguishing plate 14, the arc 16 is expanded to a large extent and has excellent breakability.
[考案の効果]
以上のように、この考案によれば、固定導体の
先端に固着したアークランナの自由端部を、可動
接触子の先端の動作軌跡に近づくように延出する
とともに、その自由端部を固定導体に最も近い消
弧板に接触させたから、アークの駆動および伸長
を速やかに行させるため、固定接点の消耗や筐体
内部の絶縁抵抗の劣化を軽減できるとともに、し
や断性能を向上させ得る回路しや断器を提供する
ことができる。[Effects of the invention] As described above, according to this invention, the free end of the arc runner fixed to the tip of the fixed conductor is extended so as to approach the motion locus of the tip of the movable contact, and the free end is Since the contact point is brought into contact with the arc-extinguishing plate closest to the fixed conductor, the arc is driven and extended quickly, reducing wear on the fixed contact and deterioration of the insulation resistance inside the casing, and improving the shearing performance. It is possible to provide circuit breakers and disconnectors that can be improved.
第1図〜第3図は従来の回路しや断器の異なる
状態での部分断面図、第4図は従来の回路しや断
器において、アークランナを有しないばあいの接
触子のアークの状態図、第5図A,Bはそれぞれ
従来の回路しや断器の部分断面図およびアークラ
ンナの作用説明図、第6図はこの考案に係る回路
しや断器の一例を示す部分断面図、第7図は第6
図のものの固定接触子を示す斜視図、第8図A〜
Cは同回路しや断器の動作説明図である。
1……容器、3……固定導体、4……固定接
点、7……可動導体、8……可動接点、16……
アーク、14……消弧板、22……アークラン
ナ、A……可動接触子の動作軌跡。なお、図中同
一符号は同一もしくは相当部分を示す。
Figures 1 to 3 are partial cross-sectional views of conventional circuit breakers and breakers in different states, and Figure 4 is a state diagram of the arc of the contact in a conventional circuit breaker without an arc runner. , FIGS. 5A and 5B are a partial cross-sectional view of a conventional circuit breaker and an explanatory diagram of the action of an arc runner, respectively. FIG. The figure is number 6
A perspective view showing the fixed contact in the figure, Figure 8A~
C is an explanatory diagram of the operation of the circuit breaker. 1... Container, 3... Fixed conductor, 4... Fixed contact, 7... Movable conductor, 8... Movable contact, 16...
Arc, 14... Arc extinguishing plate, 22... Arc runner, A... Operation locus of movable contact. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
れた少なくとも1対の固定および可動電気接触子
と、この両電気接触子の開閉動作時に発生したア
ークを消弧する消弧板と、上記固定導体の消弧板
側の先端に固着されたアークランナとを具備し、
このアークランナの自由端部を、可動接触子の先
端の動作軌跡に近づくように延出させるととも
に、その自由端部の先端を上記固定導体に最も近
い消弧板に接触させてなる回路しや断器。 At least one pair of fixed and movable electrical contacts constituted by a conductor and a contact fixed thereto; an arc-extinguishing plate for extinguishing an arc generated during the opening/closing operations of the two electrical contacts; Equipped with an arc runner fixed to the tip of the arc plate side,
The free end of this arc runner is extended so as to approach the operating locus of the tip of the movable contact, and the tip of the free end is brought into contact with the arc-extinguishing plate closest to the fixed conductor to create a circuit or break. vessel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3428284U JPS60147053U (en) | 1984-03-08 | 1984-03-08 | circuit break |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3428284U JPS60147053U (en) | 1984-03-08 | 1984-03-08 | circuit break |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60147053U JPS60147053U (en) | 1985-09-30 |
JPH0236204Y2 true JPH0236204Y2 (en) | 1990-10-02 |
Family
ID=30537505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3428284U Granted JPS60147053U (en) | 1984-03-08 | 1984-03-08 | circuit break |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60147053U (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5220348U (en) * | 1975-07-25 | 1977-02-14 | ||
JPS5495368A (en) * | 1978-01-14 | 1979-07-27 | Matsushita Electric Works Ltd | Exhaust plate for arc extinguishing apparatus |
JPS565774U (en) * | 1979-06-27 | 1981-01-19 |
-
1984
- 1984-03-08 JP JP3428284U patent/JPS60147053U/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5220348U (en) * | 1975-07-25 | 1977-02-14 | ||
JPS5495368A (en) * | 1978-01-14 | 1979-07-27 | Matsushita Electric Works Ltd | Exhaust plate for arc extinguishing apparatus |
JPS565774U (en) * | 1979-06-27 | 1981-01-19 |
Also Published As
Publication number | Publication date |
---|---|
JPS60147053U (en) | 1985-09-30 |
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JPH0351879Y2 (en) | ||
JPS645341Y2 (en) | ||
JPH0124328B2 (en) | ||
JPH01122538A (en) | Circuit breaker | |
JPS6072131A (en) | Swtich | |
JPH0218515Y2 (en) | ||
JPS6072130A (en) | Swtich | |
JPS6072135A (en) | Switch | |
JP3394600B2 (en) | Circuit breaker | |
JPH0218513Y2 (en) | ||
JPS6072127A (en) | Circuit breaker | |
JPH0586009B2 (en) | ||
JPH0142924Y2 (en) | ||
JPS645339Y2 (en) | ||
JPH0142917Y2 (en) | ||
JPS6054132A (en) | Circuit breaker | |
JPS6072124A (en) | Swtich | |
JPH06283091A (en) | Circuit breaker | |
JPS6054131A (en) | Circuit breaker | |
JPS6337453B2 (en) | ||
JPS6070627A (en) | Circuit breaker |