JPH07176245A - Puffer gas circuit breaker - Google Patents
Puffer gas circuit breakerInfo
- Publication number
- JPH07176245A JPH07176245A JP32195293A JP32195293A JPH07176245A JP H07176245 A JPH07176245 A JP H07176245A JP 32195293 A JP32195293 A JP 32195293A JP 32195293 A JP32195293 A JP 32195293A JP H07176245 A JPH07176245 A JP H07176245A
- Authority
- JP
- Japan
- Prior art keywords
- puffer
- gas flow
- swirl
- arc
- guide plate
- 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
Landscapes
- Circuit Breakers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、パッファ形ガス遮断
器の消弧室の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an arc extinguishing chamber of a puffer type gas circuit breaker.
【０００２】[0002]
【従来の技術】ガス遮断器において、電流を遮断する動
作を行うと、固定及び可動電極間にアークが発生する。
このアークを消弧する為に、ＳＦ6 ガスなどの消弧性ガ
スを圧縮して絶縁性のノズルに導き、電極間に発生した
アークに吹き付け消弧するパッファ形ガス遮断器が、従
来より存在している。図６は、一般的なパッファ形ガス
遮断器の概略構成を示す模式図である。図６に示すよう
に、ＳＦ6 ガスなどの消弧性ガスを充填した容器61内
に、固定接触子62及び可動接触子63が接離可能に対向配
置されている。可動接触子63部には、パッファシリンダ
64とパッファピストン65が設けられ、これらによってパ
ッファ室66が形成されている。パッファシリンダ64の先
端部外周には、可動接触子63を包囲し、且つ可動接触子
63より大きく突出する形状を有する絶縁性のノズル67が
配置され、パッファシリンダ64の先端部に設けられた開
口部64ａを介して、パッファ室66と連通している。この
図６のパッファ遮断器においては、電流遮断動作時に、
可動接触子63を固定接触子62から開離する方向に移動す
ると共に、パッファシリンダ64の移動により、パッファ
室66を圧縮し、パッファシリンダ64の開口部64ａよりノ
ズル67内にガス流68を導き、固定接触子62・可動接触子
63間に発生したアーク69にガス流68を吹き付けて消弧を
行う。2. Description of the Related Art In a gas circuit breaker, when an operation of cutting off an electric current is performed, an arc is generated between a fixed electrode and a movable electrode.
In order to extinguish this arc, there has been a puffer type gas circuit breaker that extinguishes the arc generated by compressing an arc extinguishing gas such as SF 6 gas to an insulating nozzle and blowing it to the arc generated between the electrodes. is doing. FIG. 6 is a schematic diagram showing a schematic configuration of a general puffer type gas circuit breaker. As shown in FIG. 6, a fixed contact 62 and a movable contact 63 are arranged facing each other in a container 61 filled with an arc extinguishing gas such as SF 6 gas so as to be able to come into contact with and separate from each other. The movable contactor 63 has a puffer cylinder.
64 and a puffer piston 65 are provided, and these form a puffer chamber 66. The movable contactor 63 is surrounded by the outer periphery of the tip of the puffer cylinder 64, and
An insulative nozzle 67 having a shape larger than 63 is arranged, and communicates with the puffer chamber 66 through an opening 64a provided at the tip of the puffer cylinder 64. In the puffer circuit breaker of FIG. 6, during the current interruption operation,
While moving the movable contactor 63 in the direction of separating from the fixed contactor 62, the puffer cylinder 64 is moved to compress the puffer chamber 66, and the gas flow 68 is guided from the opening 64a of the puffer cylinder 64 into the nozzle 67. , Fixed contact 62 / Movable contact
The gas flow 68 is blown to the arc 69 generated between 63 to extinguish the arc.
【０００３】[0003]
【発明が解決しようとする課題】従来、大電流、小電流
遮断に於いても、遮断動作は同じである。300 ｋＡ以上
の大電流遮断の際、アーク近傍は高温、高圧となり、こ
のアークを消弧する為にパッファ室圧をかなり高め、高
速なガス流をアークに吹き付けなければならなかった。
100 Ａ程度の小電流遮断の際、アークは直ぐに消える
が、遮断動作は同じであるから大電流遮断と同じく、パ
ッファ室圧は高圧となり高速なガス流を固定接触子に吹
き付けることになる。そうするとガス流の静圧が低下
し、タンク充填圧以下になると、時として再点弧し遮断
不能の事故へとつながる。Conventionally, the breaking operation is the same for breaking a large current and a small current. When a large current of 300 kA or more was cut off, the temperature in the vicinity of the arc became high temperature and pressure, and in order to extinguish the arc, the puffer chamber pressure had to be raised considerably and a high-speed gas flow had to be blown to the arc.
When a small current of about 100 A is cut off, the arc immediately extinguishes, but since the breaking operation is the same, the puffer chamber pressure becomes high and a high-speed gas flow is blown to the fixed contact, as in the case of large current breaking. Then, the static pressure of the gas flow decreases, and when it falls below the tank filling pressure, it sometimes re-ignites, leading to an accident that cannot be shut off.
【０００４】以上のように、従来技術を適用したパッフ
ァ形ガス遮断器では小電流遮断の際の再点弧を押さえる
ことが困難であった。本発明の目的は、パッファ形ガス
遮断器において、ガス流を旋回流にすることによりガス
流の静圧低下を抑え、小電流遮断の際の再点弧を抑制す
ることができる信頼性の高いパッファ形ガス遮断器を提
供するものである。As described above, it is difficult for the puffer type gas circuit breaker to which the prior art is applied to suppress re-ignition at the time of breaking a small current. An object of the present invention is, in a puffer type gas circuit breaker, by suppressing the static pressure drop of the gas flow by making the gas flow a swirl flow, it is possible to suppress re-ignition at the time of breaking a small current with high reliability. A puffer type gas circuit breaker is provided.
【０００５】[0005]
【課題を解決するための手段】本発明のパッファ形ガス
遮断器は、パッファシリンダの開口部とノズル部の間に
案内板を入れ旋回流を作り、ガス流の静圧低下を抑え小
電流遮断の際の再点弧を抑制する。In the puffer type gas circuit breaker of the present invention, a guide plate is inserted between the opening portion of the puffer cylinder and the nozzle portion to create a swirl flow to suppress a decrease in static pressure of the gas flow and cut off a small current. Suppresses re-ignition during
【０００６】[0006]
【作用】本発明による旋回流によって強制対流冷却効果
が増大するので、パッファ室圧を従来の圧力より低く抑
える事ができる。それ故、遮断器消弧室を小型化でき、
且つ、ガス流の静圧低下は従来のものより少ないので、
小電流遮断の際の再点弧を抑制することができる。The swirling flow according to the present invention increases the forced convection cooling effect, so that the puffer chamber pressure can be kept lower than the conventional pressure. Therefore, the breaker arc extinguishing chamber can be downsized,
And since the static pressure drop of the gas flow is less than the conventional one,
It is possible to suppress re-ignition when the small current is cut off.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１は、本発明に係るパッファ形ガス遮断器の一
実施例を示す側面断面図である。図１に示すように、Ｓ
Ｆ6 ガスなどの消弧性ガスを充填した容器１内に、固定
接触子２及び可動接触子３が接離可能に対向配置されて
いる。可動接触子３部には、パッファシリンダ４とパッ
ファピストン５が設けられ、これらによってパッファ室
６が形成されている。パッファシリンダ４の先端部外周
には、可動接触子３を包囲し、且つ可動接触子３より大
きく突出する形状を有する絶縁性のノズル７が配置さ
れ、パッファシリンダ４の先端部に設けられた開口部４
ａを介して、パッファ室６と連通している。ガス流に右
回りの旋回を与える翼断面形状を有する案内板10を、パ
ッファシリンダの開口部４ａとノズル７部の間に環状に
配置している。この図１のパッファ形ガス遮断器におい
ては、電流遮断動作時に、可動接触子３を固定接触子２
から開離する方向に移動すると共に、パッファシリンダ
４の移動により、パッファ室６を圧縮し、パッファシリ
ンダ４の開口部４ａより案内板10を介して、ノズル７内
に旋回ガス流８を導き、固定接触子２・可動接触子３間
に発生したアーク９に、旋回ガス流８を吹き付けて消弧
を行う。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view showing an embodiment of a puffer type gas circuit breaker according to the present invention. As shown in FIG.
In a container 1 filled with an arc-extinguishing gas such as F 6 gas, a fixed contact 2 and a movable contact 3 are arranged so as to be able to come into contact with and separate from each other. The movable contactor 3 is provided with a puffer cylinder 4 and a puffer piston 5, which form a puffer chamber 6. An insulating nozzle 7 having a shape surrounding the movable contactor 3 and projecting more than the movable contactor 3 is arranged on the outer periphery of the tip end portion of the puffer cylinder 4, and an opening provided at the tip end portion of the puffer cylinder 4. Part 4
It communicates with the puffer chamber 6 via a. A guide plate 10 having a blade cross-sectional shape that imparts a clockwise swirl to the gas flow is arranged annularly between the opening 4a of the puffer cylinder and the nozzle 7. In the puffer type gas circuit breaker of FIG. 1, the movable contactor 3 is connected to the fixed contactor 2 during the current interruption operation.
The puffer chamber 6 is compressed by the movement of the puffer cylinder 4 while being moved in the direction of separating from, and the swirling gas flow 8 is guided into the nozzle 7 from the opening 4a of the puffer cylinder 4 through the guide plate 10, The arc 9 generated between the fixed contact 2 and the movable contact 3 is blown with a swirling gas flow 8 to extinguish the arc.
【０００８】ガス流に右回りの旋回を与える案内板10部
の断面図を、図２に示す。案内板10の断面形状として、
図３の翼及び図４の矩形が使用できる。図３の翼断面形
状の方が、図４の矩形断面形状より流体抵抗は低い。FIG. 2 shows a sectional view of a portion of the guide plate 10 which imparts a clockwise swirl to the gas flow. As the cross-sectional shape of the guide plate 10,
The wings of Figure 3 and the rectangle of Figure 4 can be used. The blade cross-sectional shape of FIG. 3 has lower fluid resistance than the rectangular cross-sectional shape of FIG.
【０００９】他の実施例としては、ガス流に左回りの旋
回を与える案内板を、パッファシリンダの開口部４ａと
ノズル７部の間に環状に配置しても、同様な効果を期待
できる。ガス流に左回りの旋回を与える案内板11部の断
面図を、図５に示す。案内板11の断面形状として、図３
の翼及び図４の矩形が使用できる。As another embodiment, the same effect can be expected by arranging a guide plate for giving a counterclockwise swirl to the gas flow in an annular shape between the opening 4a of the puffer cylinder and the nozzle 7. FIG. 5 shows a cross-sectional view of 11 parts of the guide plate that imparts a counterclockwise swirl to the gas flow. The cross-sectional shape of the guide plate 11 is shown in FIG.
Wings and the rectangle of FIG. 4 can be used.
【００１０】旋回流よって強制対流冷却効果が増大する
ので、パッファ室圧を従来の圧力より低く抑える事がで
きる。それ故、遮断器消弧室を小型化でき、且つ、ガス
流の静圧低下は従来のものより少ないので、小電流遮断
の際の再点弧を抑制することができる。Since the forced convection cooling effect is increased by the swirling flow, the puffer chamber pressure can be kept lower than the conventional pressure. Therefore, the breaker arc extinguishing chamber can be downsized, and the static reduction of the gas flow is smaller than that of the conventional one, so that re-ignition at the time of breaking a small current can be suppressed.
【００１１】[0011]
【発明の効果】以上のように、この発明のパッファ形ガ
ス遮断器によれば、旋回流によって強制対流冷却効果が
増大するので、パッファ室圧を従来の圧力より低く抑え
る事ができる。それ故、遮断器消弧室を小型化でき、且
つ、ガス流の静圧低下は従来のものより少ないので、小
電流遮断の際の再点弧を抑制することができるので、小
型で高性能なパッファ形ガス遮断器が得られる効果があ
る。As described above, according to the puffer type gas circuit breaker of the present invention, since the forced convection cooling effect is increased by the swirling flow, the puffer chamber pressure can be kept lower than the conventional pressure. Therefore, the circuit breaker arc extinguishing chamber can be downsized, and the static pressure reduction of the gas flow is less than that of the conventional one, so that re-ignition at the time of interruption of a small current can be suppressed, which is small and high performance. This is effective in obtaining a puffer type gas circuit breaker.
【図１】本発明の第１の実施例のパッファ形ガス遮断器
の側面断面図FIG. 1 is a side sectional view of a puffer type gas circuit breaker according to a first embodiment of the present invention.
【図２】図１におけるガス流に右回りの旋回を与える案
内板部の断面図FIG. 2 is a cross-sectional view of a guide plate portion that imparts a clockwise swirl to the gas flow in FIG.
【図３】案内板の断面図FIG. 3 is a sectional view of the guide plate.
【図４】案内板の断面図FIG. 4 is a sectional view of the guide plate.
【図５】本発明の他の実施例のガス流に左回りの旋回を
与える案内板部の断面図FIG. 5 is a cross-sectional view of a guide plate portion that imparts a counterclockwise swirl to a gas flow according to another embodiment of the present invention.
【図６】従来のパッファ形ガス遮断器の側面断面図FIG. 6 is a side sectional view of a conventional puffer type gas circuit breaker.
２…固定接触子 ３…可動接触子 ４…パッファシリンダ ５…パッファピストン ６…パッファ室 ７…ノズル 10…案内板 2 ... Fixed contactor 3 ... Movable contactor 4 ... Puffer cylinder 5 ... Puffer piston 6 ... Puffer chamber 7 ... Nozzle 10 ... Guide plate
Claims (4)
な固定接触子及び可動接触子を有し、可動接触子部に設
けられたパッファシリンダとパッファピストンとからな
るパッファ室を圧縮することによって消弧性ガスを圧縮
してノズルに導き、固定・可動接触子間に発生したアー
クに吹き付けて消弧を行う消弧室を有するパッファ形ガ
ス遮断器において、ガス流に右回りの旋回を与える翼断
面形状を有する案内板を、パッファシリンダの開口部と
ノズル部の間に環状に入れたことを特徴とするパッファ
形ガス遮断器。1. A puffer chamber comprising a puffer cylinder and a puffer piston provided in a movable contactor portion, having a fixed contactor and a movable contactor capable of coming into contact with and separating from a container filled with an arc-extinguishing gas, and compressing the puffer chamber. In the puffer type gas circuit breaker having an arc extinguishing chamber that extinguishes the arc by compressing the arc extinguishing gas to guide it to the nozzle and blowing it to the arc generated between the fixed and movable contacts, A puffer-type gas circuit breaker, characterized in that a guide plate having a blade cross-sectional shape that gives swirl is annularly inserted between the opening of the puffer cylinder and the nozzle.
形状を有する案内板を、パッファシリンダの開口部とノ
ズル部の間に環状に入れたことを特徴とする請求項１記
載のパッファ形ガス遮断器。2. A puffer shape according to claim 1, wherein a guide plate having a rectangular cross-sectional shape for giving a clockwise swirl to the gas flow is inserted in an annular shape between the opening portion of the puffer cylinder and the nozzle portion. Gas circuit breaker.
状を有する案内板を、パッファシリンダの開口部とノズ
ル部の間に環状に入れたことを特徴とする請求項１記載
のパッファ形ガス遮断器。3. A puffer shape according to claim 1, wherein a guide plate having a blade cross-sectional shape that imparts a counterclockwise swirl to the gas flow is inserted in an annular shape between the opening portion and the nozzle portion of the puffer cylinder. Gas circuit breaker.
形状を有する案内板を、パッファシリンダの開口部とノ
ズル部の間に環状に入れたことを特徴とする請求項１記
載のパッファ形ガス遮断器。4. A puffer shape according to claim 1, wherein a guide plate having a rectangular cross-sectional shape that imparts a counterclockwise swirl to the gas flow is inserted in an annular shape between the opening portion of the puffer cylinder and the nozzle portion. Gas circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32195293A JPH07176245A (en) | 1993-12-21 | 1993-12-21 | Puffer gas circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32195293A JPH07176245A (en) | 1993-12-21 | 1993-12-21 | Puffer gas circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07176245A true JPH07176245A (en) | 1995-07-14 |
Family
ID=18138266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32195293A Pending JPH07176245A (en) | 1993-12-21 | 1993-12-21 | Puffer gas circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07176245A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10727013B2 (en) | 2016-06-20 | 2020-07-28 | Abb Schweiz Ag | Gas-insulated low- or medium-voltage switch with swirling device |
-
1993
- 1993-12-21 JP JP32195293A patent/JPH07176245A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10727013B2 (en) | 2016-06-20 | 2020-07-28 | Abb Schweiz Ag | Gas-insulated low- or medium-voltage switch with swirling device |
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