JPH06284524A - Gas insulated switchgear - Google Patents

Abstract

PURPOSE:To provide a gas insulated switchgear which maintains the degree of freedom for design and contributes to the size reduction of the whole apparatus by a method wherein the arrangement constitution of main bus-bar changeover breakers and main bus-bar arrestors which are connected to the respective three phases of main bus-bars. CONSTITUTION:Among main bus-bar changeover breakers which are connected to main bus-bars 20a and 20b, a first phase breaker 12a is provided outside the main bus-bars and a second phase breaker and a third phase breaker 12b are provided outside the main bus-bars but opposite to the first phase breaker 12a with the main bus-bars 20a and 20b therebetween. Further, the positions of second and third phase breakers 12b are shifted from each other along the axial direction of the main bus-bars 20a and 20b. Moreover, main bus-bar arrestors which are connected to respective bus-bar sections of the main bus-bars 20a and 20b are divided into arrestors 13b which are provided so as to face the first phase breaker 12a with the main bus-bars 20a and 20b therebetween and arrestors 13a which are provided so as to face the second and third phase breakers 12b with the main bus-bars 20a and 20b therebetween.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、超高電圧送電方式にお
ける基幹系統用として適したガス絶縁開閉装置に関する
ものであり、特に、３相の主母線の各相に接続される主
母線切替用遮断器および主母線用避雷器の配置構成に改
良を加えたガス絶縁開閉装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear suitable for use as a backbone system in an ultra-high voltage power transmission system, and more particularly for switching main buses connected to respective phases of three-phase main buses. The present invention relates to a gas-insulated switchgear with an improved arrangement of circuit breakers and lightning arresters for main buses.

【０００２】[0002]

【従来の技術】従来より、大電力送電時に優れた系統安
定度を発揮する送電方式として、超高電圧（以下、ＵＨ
Ｖと呼ぶ）送電方式が注目されており、開発・実用化が
進められている。このＵＨＶ送電方式における基幹系統
用としては、３相の主母線を有するガス絶縁開閉装置が
適している。2. Description of the Related Art Conventionally, an ultra-high voltage (hereinafter referred to as UH
The power transmission method (referred to as V) is drawing attention and is being developed and put to practical use. A gas-insulated switchgear having a three-phase main bus is suitable for the backbone system in this UHV power transmission system.

【０００３】ところで、ＵＨＶ送電方式は、送電ルート
数の削減および送電損失の低減が図れるという利点があ
る反面、電線−電線間、電線−大地間の静電容量に起因
する充電容量が大きくなるので、５００ｋＶ以下の系統
では比較的影響の少なかった過電圧でも問題が顕在化し
てくる。そのため、ＵＨＶ系統では系統に発生する過電
圧を抑制することが極めて重要な技術的課題となってい
る。By the way, the UHV power transmission system has an advantage that the number of power transmission routes and the power transmission loss can be reduced, but on the other hand, the charging capacity due to the capacitance between the electric wires and between the electric wires and the ground becomes large. The problem becomes apparent even with overvoltage, which has a relatively small effect in a system of 500 kV or less. Therefore, in the UHV system, it is a very important technical subject to suppress the overvoltage generated in the system.

【０００４】雷サージや投入・遮断サージなどの過電圧
は、高性能避雷器の採用や断路器の抵抗投入・抵抗遮断
方式の採用により抑制しているが、ＵＨＶ系統では変電
所が大形化し母線長が増大するので、線路側遮断器の開
放時に発生するサージ性過電圧から主母線を保護するた
め主母線上に避雷器を接続する必要がある。Overvoltages such as lightning surges and make-and-break surges are suppressed by adopting a high-performance lightning arrester and a resistance-make and resistance-break system of a disconnector. However, in a UHV system, a substation becomes large and a busbar length increases. Therefore, it is necessary to connect a lightning arrester on the main bus in order to protect the main bus from surge overvoltage that occurs when the circuit breaker is opened.

【０００５】ここで、主母線用避雷器を備えたガス絶縁
開閉装置の従来例に関して、図４および図５を参照して
具体的に説明する。図４はガス絶縁開閉装置の平面図、
図５は図４の単線結線図である。図中２０ａ，２０ｂ，
２１ａ，２１ｂは、近接して平行に設置された２回線各
３相の主母線である。主母線２０ａ，２０ｂと主母線２
１ａ，２１ｂとは同軸上に配置されている。また主母線
２０ａ，２０ｂの中央付近には、各回線毎に回線用断路
器２５ａ，２５ｂが接続されている。回線用断路器２５
ａ，２５ｂには回線用遮断器１１が接続されている。こ
の回線用遮断器１１は主母線２０ａ，２０ｂに直交して
配置されている。Here, a conventional example of a gas-insulated switchgear equipped with a main bus arrester will be specifically described with reference to FIGS. 4 and 5. FIG. 4 is a plan view of the gas insulated switchgear,
FIG. 5 is a single line connection diagram of FIG. In the figure, 20a, 20b,
Reference numerals 21a and 21b are main busbars of two phases and three phases for each of two lines, which are installed close to each other and in parallel. Main buses 20a, 20b and main bus 2
1a and 21b are arranged coaxially. Line disconnectors 25a and 25b are connected to the respective lines near the centers of the main buses 20a and 20b. Line disconnector 25
A circuit breaker 11 is connected to a and 25b. The circuit breaker 11 is arranged orthogonal to the main buses 20a and 20b.

【０００６】主母線２０ａ，２０ｂの一端部（図中下
側）には、主母線２０ａ，２０ｂの軸方向に沿って主母
線区分用遮断器１０が配置されている。この主母線区分
用遮断器１０の両端部には主母線区分用断路器２３ａ，
２３ｂが接続されており、断路器２３ａが主母線２０
ａ，２０ｂ側に、断路器２３ｂが主母線２１ａ，２１ｂ
側に接続されることにより、主母線区分用遮断器１０を
介して主母線２０ａ，２０ｂと主母線２１ａ，２１ｂと
が接続される。A main busbar section breaker 10 is arranged at one end (lower side in the figure) of the main busbars 20a, 20b along the axial direction of the main busbars 20a, 20b. At both ends of the main bus bar breaker 10, a main bus bar breaker 23a,
23b is connected and the disconnector 23a is connected to the main bus 20.
The disconnector 23b is connected to the main buses 21a and 21b on the a and 20b sides.
By being connected to the side, the main busbars 20a, 20b and the main busbars 21a, 21b are connected via the main busbar section breaker 10.

【０００７】主母線２０ａ，２０ｂの他端部（図中上
側）付近には、主母線切替用断路器２４ａ，２４ｂが接
続されている。これら断路器２４ａ，２４ｂには主母線
２０ａ，２０ｂに直交して配置される接続母線２６ａ，
２６ｂが接続されている。さらに接続母線２６ａ，２６
ｂには主母線切替用遮断器１２が接続されている。すな
わち、主母線切替用遮断器１２は主母線切替用断路器２
４ａ，２４ｂおよび接続母線２６ａ，２６ｂを介して主
母線２０ａ，２０ｂの３相各相に接続される。Main busbar switching disconnectors 24a, 24b are connected near the other ends (upper side in the figure) of the main busbars 20a, 20b. The disconnecting switches 24a and 24b have connection busbars 26a, which are arranged orthogonal to the main busbars 20a and 20b, respectively.
26b is connected. Further, connecting busbars 26a, 26
A main busbar switching breaker 12 is connected to b. That is, the main busbar switching breaker 12 is the main busbar switching disconnector 2
4a, 24b and connection buses 26a, 26b are connected to each of the three phases of main buses 20a, 20b.

【０００８】主母線用避雷器１３ａ，１３ｂは、主母線
区分用断路器２３ａ，２３ｂの近傍つまり主母線区分用
遮断器１０の両端部付近に配置されている。避雷器１３
ａが主母線２０ａ，２０ｂの図中左側に配置され、避雷
器１３ｂが主母線２０ａ，２０ｂの図中右側に配置され
る。主母線用避雷器１３ａ，１３ｂには、主母線２０
ａ，２０ｂに直交して配置される避雷器接続用母線２２
が接続されており、この接続用母線２２を介して主母線
用避雷器１３ａ，１３ｂは主母線２０ａ，２０ｂの３相
各相と接続される。The main busbar arresters 13a, 13b are arranged in the vicinity of the main busbar disconnecting switches 23a, 23b, that is, in the vicinity of both ends of the main busbar breaker 10. Lightning arrester 13
a is arranged on the left side of the main buses 20a and 20b in the drawing, and the arrester 13b is arranged on the right side of the main buses 20a and 20b in the drawing. The main bus arresters 13a and 13b are provided with a main bus 20
Arrester connecting bus bar 22 arranged orthogonal to a and 20b
Are connected, and the main bus arresters 13a and 13b are connected to the three phases of the main buses 20a and 20b via the connecting bus 22.

【０００９】ところが上記の従来例の場合、主母線用避
雷器１３ａ，１３ｂを主母線区分用遮断器１０の両端部
付近に配置したため、主母線用避雷器１３ａ，１３ｂか
ら主母線２０ａ，２０ｂの端部までの距離が長くなっ
た。その結果、主母線２０ａ，２０ｂの長さは５００ｋ
Ｖ以下の系統のガス絶縁開閉装置に用いられる主母線に
比べて、長大化した。したがって、雷サージや投入・遮
断サージなどの過電圧が主母線に侵入した場合、主母線
２０ａ，２０ｂの端部では主母線長に比例して増加する
過電圧と、サージ性過電圧が反射的に生じる過電圧とが
加わることになり、機器の絶縁を確保することが困難と
なった。However, in the above-mentioned conventional example, since the main bus arresters 13a, 13b are arranged near both ends of the main bus bar breaker 10, the main bus arresters 13a, 13b to the main bus ends 20a, 20b end portions. The distance to has become longer. As a result, the length of the main buses 20a and 20b is 500k.
Compared to the main busbars used in gas-insulated switchgear for systems below V, it has become longer. Therefore, when an overvoltage such as a lightning surge or a make-and-break surge enters the main bus, an overvoltage that increases in proportion to the main bus length at the ends of the main buses 20a and 20b and a surge-induced overvoltage are reflected. It became difficult to ensure the insulation of the equipment.

【００１０】このような不具合を解消するものとして、
図６、図７に示した配置構成を有する従来例が提案され
ている。すなわち、この従来例においては主母線２０
ａ，２０ｂの中央付近に主母線用避雷器１３ａ，１３ｂ
を配置している。そのため、主母線用避雷器１３ａ，１
３ｂから主母線２０ａ，２０ｂの端部までの距離を短く
することができる。したがって、主母線２０ａ，２０ｂ
の端部における過電圧が低減し、主母線２０ａ，２０ｂ
の端部でも機器を確実に絶縁することが可能となる。As a solution to such a problem,
A conventional example having the arrangement configuration shown in FIGS. 6 and 7 has been proposed. That is, in this conventional example, the main bus 20
Main busbar arresters 13a, 13b near the center of a, 20b
Are arranged. Therefore, the main bus arresters 13a, 1
The distance from 3b to the ends of the main buses 20a and 20b can be shortened. Therefore, the main buses 20a, 20b
The overvoltage at the ends of the main bus 20a, 20b
It is possible to reliably insulate the device even at the end of.

【００１１】[0011]

【発明が解決しようとする課題】しかしながら、上記の
ようなガス絶縁開閉装置には、次のような問題点が指摘
されていた。すなわち、図６に示したガス絶縁開閉装置
では主母線用避雷器１３ａ，１３ｂを主母線２０ａ，２
０ｂの中央付近に配置したため、新たに避雷器用の主母
線と避雷器設置用のスペースとを設ける必要が生じた。
その結果、装置を設計する際の自由度が低下し、しかも
ガス絶縁開閉装置全体の大形化を招いた。However, the following problems have been pointed out in the above gas-insulated switchgear. That is, in the gas-insulated switchgear shown in FIG. 6, the main bus arresters 13a and 13b are connected to the main busbars 20a and 2b.
Since it is arranged near the center of 0b, it is necessary to newly provide a main bus bar for the arrester and a space for installing the arrester.
As a result, the degree of freedom in designing the device is lowered, and the size of the entire gas-insulated switchgear is increased.

【００１２】本発明は、上記のような従来技術の持つ問
題点を解決するために提案されたものであり、その目的
は、主母線の３相各相に接続される主母線切替用遮断器
および主母線用避雷器の配置構成を改良することによ
り、設計上の自由度を確保すると共に装置全体の小形化
に貢献し、ＵＨＶ系統送電用として良好なガス絶縁開閉
装置を提供することである。The present invention has been proposed in order to solve the problems of the prior art as described above, and its purpose is to break a main busbar switching circuit breaker connected to each of the three phases of the main busbar. Further, by improving the arrangement configuration of the main bus arrester, it is possible to secure the degree of freedom in design and contribute to downsizing of the entire apparatus, and to provide a gas insulated switchgear which is good for UHV system power transmission.

【００１３】[0013]

【課題を解決するための手段】上記の目的を達成するた
めに、本発明のガス絶縁開閉装置は、主母線に接続され
る３相の主母線切替用遮断器のうち、第１相の遮断器を
主母線の外側に配置し、第２相および第３相の遮断器を
主母線を挟んで前記第１相の遮断器の反対側で、且つ主
母線の軸線に沿う方向に位置をずらして配置すると共
に、主母線の各母線区分毎に接続される主母線用避雷器
を、主母線を挟んで第１相の遮断器と対向して配置され
る避雷器と、主母線を挟んで第２相および第３相の遮断
器と対向して配置される避雷器とに分割することを特徴
とする。In order to achieve the above object, the gas-insulated switchgear of the present invention is a first-phase circuit breaker of a three-phase main busbar switching breaker connected to a main busbar. The circuit breaker is arranged outside the main busbar, and the second-phase and third-phase circuit breakers are arranged on the opposite side of the first-phase circuit breaker across the main busbar and in the direction along the axis of the main busbar. The main busbar arrester connected to each busbar section of the main busbar, the arrester arranged to face the first-phase breaker across the main busbar, and the second arrester located across the main busbar. It is characterized in that it is divided into a three-phase circuit breaker and a third-phase circuit breaker and a lightning arrester arranged to face it.

【００１４】[0014]

【作用】以上のような構成を有する本発明においては、
主母線を挟んで主母線切替用遮断器を、１相の遮断器と
残り２相の遮断器とに分割した遮断器を主母線の軸線に
沿う方向に位置をずらして配置したため、主母線切替用
遮断器に隣接して空きスペースを作ることができる。し
たがって、この空きスペースを主母線用避雷器を配置す
る設置スペースに利用することができ、従来例のように
避雷器用の主母線を設けたり、避雷器用の設置スペース
を新たに確保する必要がなく、設計上の自由度を確保し
つつガス絶縁開閉装置装置全体の小形化を実現すること
ができる。In the present invention having the above construction,
Since the main busbar switching circuit breaker is divided into a one-phase circuit breaker and a remaining two-phase circuit breaker across the main busbar, the circuit breakers are arranged with their positions shifted along the axis of the main busbar. A space can be created adjacent to the circuit breaker. Therefore, this empty space can be used as an installation space for arranging the main bus arrester, and it is not necessary to provide a main bus bar for the arrester as in the conventional example, or to newly secure an installation space for the arrester, The size of the entire gas-insulated switchgear device can be reduced while ensuring the degree of freedom in design.

【００１５】[0015]

【実施例】以下、本発明によるガス絶縁開閉装置の一実
施例について、図１、図２を参照して具体的に説明す
る。図１は本実施例の平面図、図２は図１の実施例に対
応するＵＨＶ系統の回線構成の一例を示す単線結線図で
ある。なお、本発明は主母線切替用遮断器および主母線
用避雷器の配置構成に改良を加えたものであり、構成部
材に関しては基本的に従来例と同一の部材を採用してい
る。したがって従来例と同一の部材には関しては従来例
と同一符号を付し、説明は省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the gas-insulated switchgear according to the present invention will be specifically described below with reference to FIGS. FIG. 1 is a plan view of the present embodiment, and FIG. 2 is a single wire connection diagram showing an example of the line configuration of the UHV system corresponding to the embodiment of FIG. The present invention is an improvement in the arrangement of the main busbar switching circuit breaker and the main busbar lightning arrester, and the constituent members are basically the same as those of the conventional example. Therefore, the same members as those in the conventional example are designated by the same reference numerals as those in the conventional example, and the description thereof will be omitted.

【００１６】本実施例の主母線切替用遮断器１２ａ，１
２ｂは、第１相から構成される主母線切替用遮断器１２
ａと、第２相および第３相から構成される主母線切替用
遮断器１２ｂとに分割される。このうち、主母線切替用
遮断器１２ａは、主母線２０ａ，２０ｂの図中左側に配
置され、主母線２０ａ，２０ｂの第１相（各主母線２０
ａ，２０ｂの左端相）に接続される。一方、主母線切替
用遮断器１２ｂは、主母線２０ａ，２０ｂの図中右側
で、且つ主母線切替用遮断器１２ａよりも図中下側にず
れて配置され、主母線２０ａ，２０ｂの第２，第３相
（各主母線２０ａ，２０ｂの中央相，右端相）に接続さ
れる。Main busbar switching circuit breakers 12a, 1 of this embodiment
2b is a main busbar switching breaker 12 composed of the first phase
a and a main busbar switching breaker 12b composed of a second phase and a third phase. Of these, the main busbar switching circuit breaker 12a is arranged on the left side of the main busbars 20a and 20b in the figure, and the first phase of each of the main busbars 20a and 20b (each main busbar 20).
a, 20b left end phase). On the other hand, the main busbar switching breaker 12b is arranged on the right side of the main busbars 20a, 20b in the figure and shifted downward from the main busbar switching breaker 12a in the figure, and the main busbars 20a, 20b , And the third phase (central phase, right end phase of each main bus 20a, 20b).

【００１７】このような主母線切替用遮断器１２ａ，１
２ｂは主母線２０ａ，２０ｂに対して次のような位置に
配置される。すなわち主母線切替用遮断器１２ａは、主
母線２０ａ，２０ｂの外側（図中左側）に配置される。
一方、主母線切替用遮断器１２ｂは、主母線２０ａ，２
０ｂを挟んで主母線切替用遮断器１２ａの反対側（図中
右側）で、且つ主母線２０ａ，２０ｂの軸線に沿って図
中下方に位置をずらして配置される。Such a main busbar switching breaker 12a, 1
2b is arranged at the following positions with respect to the main buses 20a and 20b. That is, the main busbar switching breaker 12a is arranged outside the main buses 20a and 20b (on the left side in the drawing).
On the other hand, the main busbar switching breaker 12b includes the main busbars 20a, 2
It is arranged on the opposite side (right side in the drawing) of the main busbar switching breaker 12a with 0b interposed therebetween, and is displaced downward in the drawing along the axes of the main busbars 20a and 20b.

【００１８】ところで主母線用避雷器１３ａ，１３ｂ
は、２回線各３相の主母線２０ａ，２０ｂに接続される
ので、合計６相の避雷器から構成されている。本実施例
ではこれら６相の主母線用避雷器１３ａ，１３ｂは、４
相から構成される主母線用避雷器１３ａと、２相から構
成される主母線用避雷器１３ｂとに分割される。主母線
用避雷器１３ａは、主母線２０ａ，２０ｂの図中左側
で、主母線切替用遮断器１２ｂと向い合う位置に配置さ
れ、主母線２０ａの３相各相および主母線２０ｂの第１
相（主母線２０ｂの左端相）に接続される。一方、主母
線用避雷器１３ｂは、主母線２０ａ，２０ｂの図中右側
で、主母線切替用遮断器１２ａと向い合う位置に配置さ
れ、主母線２０ｂの第２，第３相（主母線２０ｂの中央
相，左端相）に接続される。By the way, the main bus arresters 13a, 13b
Is connected to the main buses 20a and 20b of two phases for each of the three phases, and is therefore composed of a total of six-phase lightning arresters. In this embodiment, the six-phase main bus arresters 13a and 13b are four
It is divided into a main bus arrester 13a composed of phases and a main bus arrester 13b composed of two phases. The main bus arrester 13a is arranged on the left side of the main buses 20a and 20b in the figure, at a position facing the main bus switching circuit breaker 12b, and each of the three phases of the main bus 20a and the first main bus 20b.
Phase (the leftmost phase of the main bus 20b). On the other hand, the main bus arrester 13b is arranged on the right side of the main buses 20a and 20b in the figure so as to face the main bus switching circuit breaker 12a, and the second and third phases of the main bus 20b (of the main bus 20b). Central phase, leftmost phase).

【００１９】このような主母線用避雷器１３ａ，１３ｂ
は主母線２０ａ，２０ｂに対して次のような位置に配置
される。すなわち主母線用避雷器１３ａは、主母線２０
ａ，２０ｂを挟んで主母線切替用遮断器１２ａと対向し
て配置される。一方、主母線用避雷器１３は、主母線２
０ａ，２０ｂを挟んで主母線切替用遮断器１２ｂと対向
して配置される。Such a main bus arrester 13a, 13b
Are arranged at the following positions with respect to the main buses 20a and 20b. That is, the main bus arrester 13a is
It is arranged to face the main busbar switching breaker 12a with a and 20b interposed therebetween. On the other hand, the main bus arrester 13
It is arranged so as to face main busbar switching breaker 12b with 0a and 20b interposed therebetween.

【００２０】以上のような構成を有する本実施例におい
ては、主母線切替用遮断器１２ａ，１２ｂを主母線２０
ａ，２０ｂを挟んで左右に分割して配置し、さらに両遮
断器１２ａ，１２ｂを主母線２０ａ，２０ｂの軸線に沿
う方向に位置をずらして配置したため、主母線切替用遮
断器１２ａ，１２ｂに隣接して空きスペースができる。
このスペースを主母線用避雷器１３ａ，１３ｂの設置ス
ペースとして利用することにより、従来例のように避雷
器用の主母線を設けたり、避雷器用の設置スペースを新
たに確保する必要がなく、主母線２０ａ，２０ｂに対し
て主母線用避雷器１３ａ，１３ｂを配置・接続すること
ができる。したがって、設計上の自由度を確保しつつガ
ス絶縁開閉装置全体を小形化することができる。これに
より、ＵＨＶ系統送電用として良好なガス絶縁開閉装置
を提供することができる。In this embodiment having the above structure, the main busbar switching breakers 12a and 12b are connected to the main busbar 20.
Since the circuit breakers 12a and 12b are arranged so as to be separated from each other in the direction along the axis of the main buses 20a and 20b, the circuit breakers 12a and 12b for switching the main buses are arranged. There is a free space next to it.
By using this space as an installation space for the main bus arresters 13a and 13b, it is not necessary to provide a main bus for the arrester or to newly secure an installation space for the arrester unlike the conventional example, and the main bus 20a is not required. , 20b, the main bus arresters 13a, 13b can be arranged and connected. Therefore, the size of the entire gas-insulated switchgear can be reduced while ensuring the degree of freedom in design. This makes it possible to provide a good gas-insulated switchgear for UHV system power transmission.

【００２１】なお、本発明のガス絶縁開閉装置は上記実
施例に限定されるものではなく、各構成部材の形状や寸
法などは適宜変更可能であり、例えば、図３に示すよう
な実施例も包含する。この実施例における主母線切替用
遮断器１２ａ，１２ｂは、第１相および第２相から構成
される主母線切替用遮断器１２ａと、第３相から構成さ
れる主母線切替用遮断器１２ｂとに分割される。このう
ち、２相分の主母線切替用遮断器１２ａは、主母線２０
ａ，２０ｂの図中左側に所定の間隔を設けて配置され
る。一方、１相分の主母線切替用遮断器１２ｂは、主母
線２０ａ，２０ｂの図中右側で、且つ２相分の主母線切
替用遮断器１２ａの間に位置するよう配置される。The gas-insulated switchgear according to the present invention is not limited to the above-mentioned embodiment, but the shape and size of each component can be changed as appropriate. For example, the embodiment shown in FIG. Include. The main busbar switching breakers 12a and 12b in this embodiment include a main busbar switching breaker 12a composed of a first phase and a second phase, and a main busbar switching breaker 12b composed of a third phase. Is divided into Of these, the main busbar switching breakers 12a for two phases are
A predetermined distance is provided on the left side of the a and 20b in the figure. On the other hand, the main busbar switching breaker 12b for one phase is arranged on the right side of the main buses 20a and 20b in the figure and between the main busbar switching breakers 12a for two phases.

【００２２】また、主母線用避雷器１３ａは、主母線２
０ａ，２０ｂの図中左側で、主母線切替用遮断器１２ｂ
と向い合う位置に配置され、主母線２０ａの第１，第２
相に接続する２相の避雷器から構成される。一方、主母
線用避雷器１３ｂは、主母線２０ａ，２０ｂの図中右側
で、主母線切替用遮断器１２ａと向い合う位置に配置さ
れ、主母線２０ａの第３相および主母線２０ｂの第２相
に接続する２相の避雷器と、主母線２０ｂの第１，第３
相に接続する２相の避雷器とから構成される。Further, the main bus arrester 13a is provided with the main bus 2
0a, 20b on the left side in the figure, main busbar switching circuit breaker 12b
The first and second main busbars 20a are arranged at positions facing each other.
It consists of a two-phase lightning arrester connected to each phase. On the other hand, the main bus arrester 13b is arranged on the right side of the main buses 20a and 20b in the position facing the main bus switching circuit breaker 12a, and the third phase of the main bus 20a and the second phase of the main bus 20b. Two-phase lightning arrester connected to the main bus bar 20b and the first and third
It consists of a two-phase lightning arrester connected to each phase.

【００２３】以上のような構成を有する実施例において
は、２相分の主母線切替用遮断器１２ａの遮断器同士の
間隔を大きく取ることができるので、十分な作業用スペ
ースを確保することができる。また、２相分の主母線切
替用遮断器１２ａの遮断器同士の間隔が大きいので、こ
れを多少狭くしても問題がなく、ガス絶縁開閉装置の小
形化を一層進めることができる。In the embodiment having the above-mentioned structure, since the gaps between the main busbar switching breakers 12a for the two phases can be widened, a sufficient working space can be secured. it can. Further, since the interval between the circuit breakers of the main busbar switching circuit breakers 12a for two phases is large, there is no problem even if the circuit breakers are made slightly narrower, and the gas-insulated switchgear can be further downsized.

【００２４】[0024]

【発明の効果】以上説明した通り、本発明によれば、３
相ある母線切替用遮断器のうち、１相分を他の２相分の
遮断器とを主母線を挟んで振り分け、主母線の軸線に沿
う方向に位置をずらして配置するという簡単な構成によ
り、主母線切替用遮断器に隣接して空きスペースを作
り、ここに主母線用避雷器を配置することができるた
め、設計上の自由度を確保し、且つ小形化が進んだ優れ
たガス絶縁開閉装置を提供することができた。As described above, according to the present invention, 3
Of the phase-changed busbar switching circuit breakers, the one-phase circuit breaker and the other two-phase circuit breakers are distributed across the main busbar, and the positions are shifted in the direction along the axis of the main busbar. , An open space is created next to the main busbar switching breaker, and the main bus arrester can be placed here, so design flexibility is secured and excellent gas-insulated switching with advanced miniaturization Equipment could be provided.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明によるガス絶縁開閉装置の一実施例を示
す平面図FIG. 1 is a plan view showing an embodiment of a gas insulated switchgear according to the present invention.

【図２】図１の単線結線図FIG. 2 is a single line connection diagram of FIG.

【図３】本発明によるガス絶縁開閉装置の他の一実施例FIG. 3 is another embodiment of the gas insulated switchgear according to the present invention.

【図４】従来のガス絶縁開閉装置の一例を示す平面図FIG. 4 is a plan view showing an example of a conventional gas-insulated switchgear.

【図５】図４の従来例の単線結線図FIG. 5 is a single line connection diagram of the conventional example of FIG.

【図６】従来のガス絶縁開閉装置の一例を示す平面図FIG. 6 is a plan view showing an example of a conventional gas-insulated switchgear.

【図７】図６の従来例の単線結線図FIG. 7 is a single line connection diagram of the conventional example of FIG.

【符号の説明】[Explanation of symbols]

１１…回線用遮断器 １２，１２ａ，１２ｂ…主母線切替用遮断器 １３ａ，１３ｂ…主母線用避雷器 ２０ａ，２０ｂ，２１ａ，２１ｂ…主母線 ２２ａ，２２ｂ…避雷器接続用母線 ２４ａ，２４ｂ…主母線切替用断路器 ２５ａ，２５ｂ…回線用断路器 ２６ａ，２６ｂ…接続母線 11 ... Circuit breaker 12, 12a, 12b ... Main busbar switching circuit breaker 13a, 13b ... Main busbar lightning arrester 20a, 20b, 21a, 21b ... Main busbar 22a, 22b ... Lightning arrester connecting busbar 24a, 24b ... Main busbar Switching disconnectors 25a, 25b ... Circuit disconnectors 26a, 26b ... Connection busbars

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 １または２回線以上の３相の主母線と、
該主母線に直交して配置され、且つ前記主母線に接続さ
れる３相の主母線切替用遮断器と、前記主母線の各母線
区分毎に接続される主母線用避雷器とを有するガス絶縁
開閉装置において、 前記主母線切替用遮断器を第１相の遮断器と、第２相お
よび第３相の遮断器とに分割し、このうち、第１相の遮
断器を前記主母線の外側に配置し、第２相および第３相
の遮断器を前記主母線を挟んで前記第１相の遮断器の反
対側で、且つ前記主母線の軸線に沿う方向に位置をずら
して配置すると共に、 前記主母線用避雷器を、前記主母線を挟んで前記第１相
の遮断器と対向して配置される避雷器と、前記主母線を
挟んで第２相および第３相の遮断器と対向して配置され
る避雷器とに分割することを特徴とするガス絶縁開閉装
置。1. A three-phase main bus with one or more lines,
Gas insulation having a three-phase main busbar switching breaker arranged orthogonal to the main busbar and connected to the main busbar, and a main busbar surge arrester connected to each busbar section of the main busbar In the switchgear, the main busbar switching circuit breaker is divided into a first-phase circuit breaker and second-phase and third-phase circuit breakers, of which the first-phase circuit breaker is located outside the main busbar. And disposing the second-phase and third-phase circuit breakers on the opposite side of the first-phase circuit breaker with the main bus bar sandwiched therebetween and in a position along the axis of the main bus bar. An arrester arranged to face the first-phase circuit breaker with the main bus bar interposed therebetween, and a second-phase and third-phase circuit breaker disposed to face the first-phase circuit breaker with the main bus bar interposed therebetween. A gas-insulated switchgear, characterized in that it is divided into a lightning arrester that is arranged as a unit.