JPS627653B2 - - Google Patents
Info
- Publication number
- JPS627653B2 JPS627653B2 JP53098384A JP9838478A JPS627653B2 JP S627653 B2 JPS627653 B2 JP S627653B2 JP 53098384 A JP53098384 A JP 53098384A JP 9838478 A JP9838478 A JP 9838478A JP S627653 B2 JPS627653 B2 JP S627653B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- electrode
- extinguishing fluid
- extinguishing
- fluid
- 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
- 239000012530 fluid Substances 0.000 claims description 32
- 238000005507 spraying Methods 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
Landscapes
- Circuit Breakers (AREA)
Description
【発明の詳細な説明】
この発明は電極間に発生したアークに消弧性流
体を吹き付けもしくは流動させることによつてア
ークを消弧するようにした開閉器に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch that extinguishes an arc by spraying or flowing an arc extinguishing fluid onto the arc generated between electrodes.
一般に機械的圧縮力を利用するパツフア型、高
圧消弧流体の貯気槽を備えた二重圧力式等で代表
される他力型や、アーク自体の発生する圧力を利
用する自力型しや断器においては、電流零点近傍
における消弧性流体の流動によつて生じる消弧作
用により、アークを消弧している。この消弧作用
の強弱は、流動流体の密度、温度、速度の高低
や、流動流体とアークの接触面積の大小等によつ
て、大きく影響を受ける。この接触面積の拡大
は、しや断性能向上につながるものである。 In general, there are the power type, which uses mechanical compression force, the external force type, such as the dual pressure type equipped with a storage tank for high-pressure arc extinguishing fluid, and the self-acting type, which uses the pressure generated by the arc itself. In the arc extinguisher, the arc is extinguished by the arc extinguishing action produced by the flow of the arc extinguishing fluid near the current zero point. The strength of this arc-extinguishing effect is greatly influenced by the density, temperature, and velocity of the flowing fluid, and the contact area between the flowing fluid and the arc. This increase in contact area leads to improved shear cutting performance.
従来、他力型・自力型しや断器においては、流
動流体とアークの接触面積に対する考慮は、ほと
んどなされておらなかつた為、強い流動状態が誘
起されているにも拘らず、アーク時間が延びた
り、時には、しや断性能の著しい低下を示す欠点
があつた。 Conventionally, in externally-powered and self-powered type breakers, little consideration was given to the contact area between the flowing fluid and the arc, so even though a strong flowing state was induced, the arc time was There were drawbacks such as elongation and, in some cases, a significant decrease in shearing performance.
第１図は、従来の中空可動コンタクトを備えた
自力型開閉器の例である。図において、１は固定
電極、２は中空可動電極、３は可動電極２に設け
られた消弧性流体の流通口である。５はアークに
よる昇圧流体を貯る為の貯気槽を形成する筐体で
あり、一般に絶縁物にて構成される。７は筐体５
により形成された貯気槽空間で、内部にSF6ガス
のような消弧性流体を収容している。このような
構成において図示しない操作機構に引外し指令が
与えられると、操作機構に連結された可動電極２
が右方向へ動く事により開極動作が開始される。
ワイピングの間は固定電極１と可動電極２の接触
にて電流通路が確保されており、ワイピングが終
ると固定電極１と可動電極２の間にアーク６が発
生する。このアークの発生したエネルギーは貯気
槽空間７に昇圧されて蓄積され、流通口３を通じ
て外部へ排出される。この際可動電極２に向つて
吹き付ける消弧性流体８がアークを冷却し、電流
零点に到つてアークを消弧するが、中抜き可動電
極上におけるアークの位置は、電極の構造上、電
極周辺部にある。従つてアーク径の大きい大電流
においては消弧性流体流路は閉塞され、昇圧・蓄
積が行なわれるが、小電流においてはアーク径が
小さい故に、消弧性流体流路は閉塞されず、消弧
性流体は昇圧されてもすみやかに排出される為、
充分な昇圧・蓄積が行なわれず、消弧性能の著し
い低下が起るという欠点があつた。 FIG. 1 is an example of a conventional self-powered switch equipped with a hollow movable contact. In the figure, 1 is a fixed electrode, 2 is a hollow movable electrode, and 3 is an arc-extinguishing fluid flow port provided in the movable electrode 2. Reference numeral 5 denotes a housing forming an air storage tank for storing pressurized fluid due to the arc, and is generally made of an insulating material. 7 is the housing 5
This is an air storage tank space formed by a gas tank, which contains an arc-extinguishing fluid such as SF 6 gas. In such a configuration, when a tripping command is given to the operating mechanism (not shown), the movable electrode 2 connected to the operating mechanism
The opening operation is started by moving to the right.
During wiping, a current path is ensured by the contact between the fixed electrode 1 and the movable electrode 2, and when the wiping is finished, an arc 6 is generated between the fixed electrode 1 and the movable electrode 2. The energy generated by this arc is pressurized and stored in the air storage tank space 7, and is discharged to the outside through the communication port 3. At this time, the arc-extinguishing fluid 8 sprayed toward the movable electrode 2 cools the arc and extinguishes the arc when it reaches the current zero point. However, due to the structure of the electrode, the arc is located around the electrode. It's in the department. Therefore, at a large current with a large arc diameter, the arc-extinguishing fluid flow path is blocked and the pressure increases and accumulates, but at a small current, the arc-extinguishing fluid flow path is not blocked and the arc is extinguished because the arc diameter is small. Arc fluid is quickly discharged even if it is pressurized, so
The disadvantage was that sufficient pressure increase and accumulation was not carried out, resulting in a significant decrease in arc extinguishing performance.
この発明は、消弧性流体の流路を防げることな
く、アークの電極表面上の位置を限定することに
より上記欠点を補ない、高いしや断性能のしや断
器を提供することを目的とするものである。以下
この発明の実施例を図について詳細に説明する。 An object of the present invention is to provide an arc breaker with high arc cutting performance that compensates for the above drawbacks by limiting the position of the arc on the electrode surface without blocking the flow path of the arc extinguishing fluid. That is. Embodiments of the present invention will be described in detail below with reference to the drawings.
第２図は、この発明の一実施例による開閉器を
示す断面図で、第３図および第４図は第２図の各
部横断面図である。図において、１は固定電極、
２は金属物にて構成された管状包囲体で、後述す
るアーク電極を包囲すると共にその電極の周囲に
流路を形成し、且つ可動電極を兼ねている。３は
前記包囲体２に穿たれた消弧性流体の流通口であ
る。４は包囲体内に内装されたアーク電極、５は
アーク６による昇圧流体を貯る為の貯気槽を形成
する筐体であり、絶縁物にて構成される。７は筐
体５により形成された貯気槽空間で、内部にSF6
ガスのような消弧性流体８を収容している。この
ような構成において、図の省略された操作機構に
引外し指令が与えられると、操作機構は動作を始
め、これに連結されている可動電極兼包囲体２と
アーク電極４は一体となつて、図の右方向へ動き
始める。ワイピングの間は、固定電極１と可動電
極２の接触にて電流通路が確保されており、ワイ
ピングが終ると固定電極１と可動電極２の間にア
ーク６が発生する。固定電極１と可動電極２の間
のアーク６は、流通口３を通じて排出される消弧
性流体８の流れの影響によつて、固定電極１とア
ーク電極４の間へ転移する。したがつて消弧性流
体８の流路は棒状のアーク電極４の周囲に形成さ
れる為、アークの包囲体２内に生じている部分
は、常にその全外周が、消弧性流体の流動にさら
される事になり、消弧性流体とアークの接触面積
が大巾に増大し、消弧能力が著しく向上する。ま
たアーク６はその一部が包囲体２内の流路に存在
することになるため、このアークの発生する圧力
によつて流路の実効的な断面積は減少する。従つ
て貯気槽空間７からの消弧性流体の流出は抑制せ
られ消弧性流体の昇圧・蓄積は促進されることに
なり、消弧性能は向上する。この際、流路断面径
より大きい径をもつアークは転移せず、小さい径
のアークは転移するから、従来の大電流に対する
消弧性能の劣化をきたす事なく、小電流の性能を
向上させる事が出来る。 FIG. 2 is a sectional view showing a switch according to an embodiment of the present invention, and FIGS. 3 and 4 are cross-sectional views of various parts of FIG. 2. In the figure, 1 is a fixed electrode,
Reference numeral 2 denotes a tubular enclosure made of metal, which surrounds an arc electrode to be described later, forms a flow path around the electrode, and also serves as a movable electrode. Reference numeral 3 designates an arc-extinguishing fluid communication port bored in the enclosure 2. Reference numeral 4 indicates an arc electrode housed within the enclosure, and reference numeral 5 indicates a housing forming an air storage tank for storing pressurized fluid due to the arc 6, and is made of an insulator. 7 is an air storage tank space formed by the casing 5, with SF 6 inside.
It contains an arc-extinguishing fluid 8 such as gas. In such a configuration, when a tripping command is given to the operating mechanism (not shown), the operating mechanism starts operating, and the movable electrode/enveloping body 2 and the arc electrode 4 connected thereto become integral. , it starts moving to the right in the figure. During wiping, a current path is ensured by the contact between the fixed electrode 1 and the movable electrode 2, and when the wiping is finished, an arc 6 is generated between the fixed electrode 1 and the movable electrode 2. The arc 6 between the fixed electrode 1 and the movable electrode 2 is transferred to between the fixed electrode 1 and the arc electrode 4 under the influence of the flow of the arc-extinguishing fluid 8 discharged through the flow port 3. Therefore, since the flow path of the arc-extinguishing fluid 8 is formed around the rod-shaped arc electrode 4, the entire outer periphery of the portion of the arc occurring within the arc enclosure 2 is always covered by the flow of the arc-extinguishing fluid. As a result, the contact area between the arc-extinguishing fluid and the arc is greatly increased, and the arc-extinguishing ability is significantly improved. Furthermore, since a portion of the arc 6 is present in the flow path within the enclosure 2, the effective cross-sectional area of the flow path is reduced by the pressure generated by this arc. Therefore, the outflow of the arc-extinguishing fluid from the air storage tank space 7 is suppressed, the pressure increase and accumulation of the arc-extinguishing fluid is promoted, and the arc-extinguishing performance is improved. At this time, arcs with a diameter larger than the cross-sectional diameter of the flow channel do not transfer, and arcs with a smaller diameter do transfer, so the performance for small currents can be improved without deteriorating the conventional arc extinguishing performance for large currents. I can do it.
なお、実施例においては、自力型の可動電極に
包囲体を適用した例ついて述べているが、他力型
においても同様である。また包囲体２は可動電極
と兼用させているが固定電極と兼用させても同様
である。 In the embodiments, an example in which an enclosure is applied to a self-powered movable electrode is described, but the same applies to a self-powered movable electrode. Furthermore, although the enclosure 2 is used also as a movable electrode, the same effect can be achieved even if it is used also as a fixed electrode.
以上のようにこの発明はアーク電極の周囲に消
弧性流体の流路を形成したから、アークの存在範
囲と流体の流れの相対的位置関係が限定されるの
で、しお断性能の著しい向上が図れる。 As described above, since this invention forms a flow path for arc extinguishing fluid around the arc electrode, the relative positional relationship between the arc existing range and the fluid flow is limited, so the shearing performance is significantly improved. can be achieved.
第１図は従来の自力型開閉器の断面図、第２図
はこの発明の一実施例を示す縦断面図、第３図は
第２図の−線断面図、第４図は第２図の−
線断面図である。なお図中同一符号は同一或は
相当する部分を示す。
図において、１は固定電極、２は可動電極兼包
囲体、３は消弧性流体の流通口、４はアーク電
極、５は筐体、６はアーク、７は貯気槽空間、８
は消弧性流体である。
Fig. 1 is a sectional view of a conventional self-powered switch, Fig. 2 is a longitudinal sectional view showing an embodiment of the present invention, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a sectional view of of-
FIG. Note that the same reference numerals in the figures indicate the same or corresponding parts. In the figure, 1 is a fixed electrode, 2 is a movable electrode and enclosure, 3 is an arc-extinguishing fluid flow port, 4 is an arc electrode, 5 is a housing, 6 is an arc, 7 is an air storage tank space, and 8
is an arc-quenching fluid.
Claims (1)
て、電極間に発生したアークを消弧する開閉器に
おいて、消弧性流体を収容した貯気槽空間を形成
する筐体と、この筐体内で開閉される一対の電極
と、この一対の電極の少なくとも一方の中空部分
に設けられたアーク電極とより構成され、このア
ーク電極が設けられた電極の壁面に、開極動作時
に、この壁面と上記アーク電極との間に形成され
た上記消弧性流体の流路を経てこの消弧性流体が
上記筐体の外部へ流出する流通口を備えている開
閉器。1. In a switch that extinguishes an arc generated between electrodes by spraying or flowing an arc-extinguishing fluid, there is a casing that forms an air storage tank space containing the arc-extinguishing fluid, and a switch that opens and closes within this casing. and an arc electrode provided in the hollow portion of at least one of the pair of electrodes, and the wall surface of the electrode provided with this arc electrode is exposed to the wall surface and the above-mentioned arc during the opening operation. A switch including a flow port through which the arc-extinguishing fluid flows out of the casing through a flow path for the arc-extinguishing fluid formed between the electrode and the arc-extinguishing fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9838478A JPS5525923A (en) | 1978-08-11 | 1978-08-11 | Switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9838478A JPS5525923A (en) | 1978-08-11 | 1978-08-11 | Switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5525923A JPS5525923A (en) | 1980-02-25 |
| JPS627653B2 true JPS627653B2 (en) | 1987-02-18 |
Family
ID=14218363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9838478A Granted JPS5525923A (en) | 1978-08-11 | 1978-08-11 | Switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5525923A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6423742U (en) * | 1987-07-29 | 1989-02-08 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5827936B2 (en) * | 1981-02-23 | 1983-06-13 | 和田精密歯研株式会社 | porous metal denture |
| CH662443A5 (en) * | 1983-10-28 | 1987-09-30 | Bbc Brown Boveri & Cie | EXHAUST GAS SWITCH. |
| JPS60167225A (en) * | 1984-02-10 | 1985-08-30 | 株式会社日立製作所 | Gas breaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3739125A (en) * | 1972-04-27 | 1973-06-12 | Gen Electric | Puffer type gas blast circuit breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4729345U (en) * | 1971-04-26 | 1972-12-04 |
-
1978
- 1978-08-11 JP JP9838478A patent/JPS5525923A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3739125A (en) * | 1972-04-27 | 1973-06-12 | Gen Electric | Puffer type gas blast circuit breaker |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6423742U (en) * | 1987-07-29 | 1989-02-08 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5525923A (en) | 1980-02-25 |
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