JP2004266969A

JP2004266969A - Gas insulated switchgear

Info

Publication number: JP2004266969A
Application number: JP2003056589A
Authority: JP
Inventors: Katsuyuki Takada; 勝之高田; Shunji Ito; 俊二伊藤; Shoji Omori; 荘司大森; Masahei Wachi; 雅平和知; Noriyuki Tetsu; 則幸鉄
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 2003-03-04
Filing date: 2003-03-04
Publication date: 2004-09-24

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas insulated switchgear which makes it possible to reduce the height of a cable case and thus the cost, including the cost of a building in which the gas insulating switchgear is installed. <P>SOLUTION: A horizontal branch pipe 15 connecting to a circuit breaker case 10 is formed in the cable case 14. A line-side three-position disconnector 16 of a circuit breaker 11 is housed and installed in the horizontal branch pipe 15 of the cable case. The bus-side three-position disconnectors 7 and 8 of the circuit breaker 11 are installed in the horizontal branch pipes 5 and 6 of bus cases 1 and 2. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は電力の送配電や受配電に用いられるガス絶縁開閉装置に関する。
【０００２】
【従来の技術】
【特許文献１】特開平１０―７５５１３号公報
一般に、ガス絶縁開閉装置は電力の送配電や受配電を行うために電力系統の開閉に多く採用されている。ガス絶縁開閉装置は電力系統から通常２回線を引込み、主母線は電力の安定供給のため２重母線方式にしている。主母線は相分離配置あるいは３相一括配置するようにしている。
【０００３】
ガス絶縁開閉装置は電力系統のケーブルがケーブルヘッドを介してケーブル容器に引込れ遮断器を介して主母線に接続される。遮断器の電力系統側（以後、線路側と称する）と主母線側（以後、母線側と称する）に断路器と接地開閉器を設けている。主母線が２重母線の場合には、遮断器の母線側には両主母線毎に断路器と接地開閉器が設けられる。
【０００４】
このように遮断器の線路側と母線側には遮断器の保守点検のために断路器と接地開閉器が設けられる。この断路器と接地開閉器を１台の３点位置形開閉器で構成するようにしている。３点位置形開閉器は３点位置形接地装置付断路器と呼称されているが、以後、本明細書では３位置形断路器と称する。３位置形断路器を用いると、断路器と接地開閉器間のインタ−ロックを採る必要がなくシステム簡素化、誤操作防止など信頼性を高めることができる。
【０００５】
断路器と接地開閉器を１台の３位置形断路器で構成することは、例えば、上記特許文献１に記載されている。従来、遮断器の線路側の３位置形断路器は円筒形状のケーブル容器に垂直方向（高さ方向）に配置し、また、母線側の３位置形断路器を母線容器の分岐管内に配置している。
【０００６】
【発明が解決しようとする課題】
従来技術は、遮断器線路側の３位置形断路器をケーブル容器内に、ケーブル容器軸線上に垂直方向（高さ方向）に配置しており、ケーブル容器の高さ方向の長さが大きくなる。例えば、３００ｍｍ〜５００ｍｍ程度大きくなる。ガス絶縁開閉装置を建屋の屋内に設置しようとすると建屋を高くしなければならず建屋を含むコストが大になるという問題点を有する。また、天井クレーンの高さにも制限があることからケーブル容器の高さを小さくすることが強く望まれている。
【０００７】
本発明の目的はケーブル容器の高さを小さくしてガス絶縁開閉装置を設置する建屋を含むコスト低減を図ることができるガス絶縁開閉装置を提供することにある。
【０００８】
【課題を解決するための手段】
本発明の特徴とするところはケーブル容器に遮断器容器と連結する水平分岐管を形成し、このケーブル容器水平分岐管内に遮断器線路側の３位置形断路器を配置するようにしたことにある。
【０００９】
本発明はケーブル容器に形成され遮断器容器と連結する水平分岐管内に遮断器線路側の３位置形断路器を配置しているのでケーブル容器の高さを小さくでき、ガス絶縁開閉装置を設置する建屋を含むコスト低減を図ることができる。
【００１０】
【発明の実施の形態】
図１、２に本発明に一実施例を示す。図１はガス絶縁開閉装置の断面機器配置図で、図２は１回線の平面機器配置構成図である。図１は図２のＡ―Ａ断面図に相当する。図１、２は２重母線の例を示している。
【００１１】
図１、２において、円筒状の母線容器１、２にはそれぞれ３相の主母線３、４が張設されている。３相の主母線３、４には図示を簡略化するため１相の主母線３、４に主回路導体１９を接続している例を示している。母線容器１、２には遮断器容器１０に連結する水平分岐管５、６が形成されている。
【００１２】
水平分岐管５、６内には縦形遮断器１１の母線側の３位置形断路器７、８が収納配置されている。母線容器１と水平分岐管５および母線容器２と水平分岐管６のそれぞれの内部には絶縁ガスが密封して封入されている。
【００１３】
円筒状の遮断器容器１０には縦形遮断器１１が収納配置されている。遮断器容器１０の図示右側（ケーブル容器１４側）には水平分岐管１２が形成されている。遮断器容器１０と水平分岐管１２の内部には絶縁ガスが密封して封入されている。遮断器１１の母線側は主回路導体１９によって３位置形断路器７、８に接続されている。
【００１４】
遮断器容器１０には遮断器１１の母線側電流を検出する変流器２８が配置されている。変流器２８は主回路導体１９に取付けられる。また、遮断器容器１０の水平分岐管１２には遮断器１１の線路側電流を検出する変流器２７が配置されている。変流器２７は主回路導体１９に取付けられる。
【００１５】
円筒状のケーブル容器１４は図示左側（遮断器容器側）に遮断器容器１０と連結する水平分岐管１５が形成されている。水平分岐管１５内には縦形遮断器１１の線路側の３位置形断路器１６が収納配置されている。３位置形断路器１６の母線側端は主回路導体１９により遮断器１１の線路側に接続されている。３位置形断路器１６の線路側端は主回路導体１９によりケ−ブル切離装置２５を介してケ−ブルヘッド２０に接続される。
【００１６】
ケーブル容器１４の水平分岐管１５より下方の図示右側に分岐管１７が形成されている。分岐管１７には電力系統からの引込みケーブルの直流耐圧試験を行うための切離装置２２が設けられており、また、直流耐圧試験端子２３が設けられている。電力系統ケーブルの直流耐圧試験は切離装置２２を「入」にし、ケ−ブル切離装置２５を「切」にして行われる。
【００１７】
ケ−ブル容器１４の上部に計器用変圧器２６が載置して配置され、水平分岐管１５の下方に接地開閉器２４が取付けられている。ケーブル容器１４、水平分岐管１５および分岐管１７の密封容器を構成し、内部には絶縁ガスが封入されている。
【００１８】
このように構成されるガス絶縁開閉装置は図２に示すように母線容器水平分岐管５、遮断器容器１０、ケーブル容器水平分岐管１２およびケーブル容器１４が直線上に配置されている。
【００１９】
ガス絶縁開閉装置の単線接続図は図３のようになる。ケ−ブルヘッド２０を介して導入した主回路導体１９はケ−ブル切離装置２５、３位置形断路器１６を介して遮断器１１の線路側端に接続されている。ケ−ブルヘッド２０とケ−ブル切離装置２５の間には直流耐圧試験用切離装置２２を介して直流耐圧試験口２３の一端と接地開閉器２４の一端が接続されている。
【００２０】
３位置形断路器１６の線路側に計器用変成器２６が接続され、３位置形断路器１６と遮断器１１の間に変流器２７が設けられている。遮断器１１の母線側端は３位置形断路器７、８を介して主母線３または４に接続される。
【００２１】
図４に３位置形断路器１６の一例構成図を示す。図４は１相分を示している。
【００２２】
主回路導体１９に固定側導体３０の一端が接続され、固定側導体３０の他端にブレード３１の回転端（他端）が接触している。ブレード３１の一端は可動側導体３２に回動自在に支持されている。
【００２３】
ブレード３１は絶縁操作ロッド３３を介して回転レバー３４に機械的に連結されている。ケ−ブル容器１４の水平分岐管１５の下面に接地端子３５が取付けられている。
【００２４】
図示しない操作器により回転レバ−３４を回転させると、絶縁操作ロッド３３を介してブレ−ド３１が可動側導体３２の支持点を支点として回転する。図４はブレード３１が固定側導体３０に接触し断路器「入」の状態を示している。図４の状態からブレード３１が時計方向に回転し接地端子３５に接触すると接地開閉器「入」の状態になる。ブレ−ド３１が固定側導体３０と接地端子３５の中間に位置した場合に断路器、接地開閉器が「切」の状態になる。
【００２５】
図５に３位置形断路器７の一例構成図を示す。図５は１相分を示している。３位置形断路器８は３位置形断路器７と同じ構成である。
【００２６】
固定側導体４０は一端を主母線３に接続され、固定側導体４０の他端にブレード４１の回転端（他端）が接触している。ブレード４１の一端は可動側導体４２に回動自在に支持されている。可動側導体４２は主回路導体１９に接続されている。
【００２７】
ブレード４１は絶縁操作ロッド４３を介して回転レバー４４に機械的に連結されている。母線容器１の水平分岐管５の上面に接地端子４５が取付けられている。
【００２８】
３位置形断路器７は図４に示す３位置形断路器１６と同様に図示しない操作器により回転レバ−４４を回転させると、絶縁操作ロッド４３を介してブレ−ド４１が可動側導体４２の支持点を支点として回転する。図５はブレード４１が固定側導体４０に接触し断路器「入」の状態を示している。図５の状態からブレード４１が時計方向に回転し接地端子４５に接触すると接地開閉器「入」の状態になる。ブレ−ド４１が固定側導体４０と接地端子４５の中間に位置した場合に断路器、接地開閉器が「切」の状態になる。
【００２９】
本発明のガス絶縁開閉装置は以上のように構成されており、遮断器１１の保守点検を行う場合には線路側の３位置形断路器１６と母線側の３位置形断路器７、８を接地開閉器「入」の状態あるいは断路器、接地開閉器を「切」の状態にして行われる。
【００３０】
このように本発明のガス絶縁開閉装置はケーブル容器に形成され遮断器容器と連結する水平分岐管内に遮断器線路側の３位置形断路器を配置しているのでケーブル容器の高さを小さくでき、ガス絶縁開閉装置を設置する建屋を含むコスト低減を図ることができる。
【００３１】
また、ケ−ブル容器の長さを短くすることにより、ガス絶縁開閉装置全体の高さを低くできるので、電力ケ−ブルの端末処理作業の空間を確保できるという実用上の効果を奏することができる。
【００３２】
さらに、上述の実施例は遮断器容器に水平分岐管を設け線路側変流器を収納配置しているので、直線状に張設された主回路導体に線路側変流器を取付けることができ線路側変流器の取付けを容易に行うことができる。
【００３３】
なお、上述の実施例は遮断器容器に水平分岐管を設け線路側変流器を収納配置しているが、線路側変流器を遮断器容器本体に収納配置できれば遮断器容器に水平分岐管を設けなくても良いことは明らかなことである。
【００３４】
【発明の効果】
本発明はケーブル容器に形成され遮断器容器と連結する水平分岐管内に遮断器線路側の３位置形断路器を配置しているのでケーブル容器の高さを小さくでき、ガス絶縁開閉装置を設置する建屋を含むコスト低減を図ることができる。
【図面の簡単な説明】
【図１】本発明の一実施例を示す断面機器配置構成図である。
【図２】本発明の一実施例を示す機器配置平面図である。
【図３】本発明の一実施例の単線接続図である。
【図４】３位置形断路器の一例を示す構成図である。
【図５】３位置形断路器の他の一例を示す構成図である。
【符号の説明】
１、２…母線容器、３、４…主母線、５、６…母線容器水平分岐管、７、８、１６…３位置形断路器、１０…遮断器容器、１１…遮断器、１２…遮断器容器水平分岐管、１４…ケ−ブル容器、１５…ケ−ブル容器水平分岐管、１７…分岐管、１９…主回路導体、２０…ケ−ブルヘッド、２２…直流耐圧試験用切離装置、２３…直流耐圧試験用端子、２４…接地開閉器、２５…ケ−ブル切離装置、２６…計器用変圧器、２７、２８…変流器。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a gas insulated switchgear used for power transmission and distribution and power distribution.
[0002]
[Prior art]
[Patent Document 1] Japanese Patent Application Laid-Open No. H10-75513 Generally, a gas insulated switchgear is often used for opening and closing an electric power system in order to transmit and receive and distribute electric power. The gas insulated switchgear usually draws two lines from the power system, and the main bus is of a double bus type for stable power supply. The main bus is arranged in a phase-separated arrangement or a three-phase arrangement.
[0003]
In the gas insulated switchgear, the cable of the power system is led into the cable container via the cable head and connected to the main bus via the circuit breaker. A disconnector and a grounding switch are provided on the power system side (hereinafter, referred to as a line side) and the main bus side (hereinafter, referred to as a bus side) of the circuit breaker. When the main bus is a double bus, a disconnector and a grounding switch are provided for each main bus on the bus side of the circuit breaker.
[0004]
As described above, the disconnector and the earthing switch are provided on the line side and the bus side of the circuit breaker for maintenance and inspection of the circuit breaker. The disconnecting switch and the grounding switch are constituted by one three-point position switch. The three-point switch is referred to as a three-position switch with a grounding device, but is hereinafter referred to as a three-position switch in the present specification. When a three-position disconnector is used, it is not necessary to take an interlock between the disconnector and the grounding switch, and the reliability can be improved, such as simplification of the system and prevention of erroneous operation.
[0005]
The configuration of the disconnector and the grounding switch with one three-position disconnector is described, for example, in Patent Document 1 described above. Conventionally, a three-position disconnector on the line side of a circuit breaker is disposed vertically (in a height direction) on a cylindrical cable container, and a three-position disconnector on the bus side is disposed in a branch pipe of the bus container. ing.
[0006]
[Problems to be solved by the invention]
In the prior art, the three-position disconnector on the circuit breaker line side is disposed in the cable container in the vertical direction (height direction) on the axis of the cable container, and the length of the cable container in the height direction increases. . For example, it becomes larger by about 300 mm to 500 mm. If the gas insulated switchgear is to be installed inside a building, the building must be raised and the cost including the building increases. In addition, since the height of the overhead crane is limited, it is strongly desired to reduce the height of the cable container.
[0007]
An object of the present invention is to provide a gas insulated switchgear capable of reducing costs including a building in which a gas insulated switchgear is installed by reducing the height of a cable container.
[0008]
[Means for Solving the Problems]
A feature of the present invention is that a horizontal branch pipe connected to the circuit breaker container is formed in the cable container, and the three-position disconnector on the circuit breaker line side is arranged in the horizontal branch pipe of the cable container. .
[0009]
According to the present invention, since the three-position disconnector on the circuit breaker line side is arranged in the horizontal branch pipe formed in the cable container and connected to the circuit breaker container, the height of the cable container can be reduced and the gas insulated switchgear is installed. Costs including the building can be reduced.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
1 and 2 show an embodiment of the present invention. FIG. 1 is a sectional equipment layout of a gas insulated switchgear, and FIG. 2 is a plane equipment layout of one line. FIG. 1 corresponds to a sectional view taken along line AA of FIG. 1 and 2 show examples of a double bus.
[0011]
In FIGS. 1 and 2, three-phase main buses 3 and 4 are stretched over cylindrical busbar containers 1 and 2, respectively. The three-phase main buses 3 and 4 show an example in which the main circuit conductor 19 is connected to the one-phase main buses 3 and 4 to simplify the illustration. Horizontal branch pipes 5 and 6 connected to the circuit breaker container 10 are formed in the busbar containers 1 and 2.
[0012]
In the horizontal branch pipes 5, 6, three-position disconnectors 7, 8 on the bus side of the vertical circuit breaker 11 are housed and arranged. An insulating gas is hermetically sealed in each of the bus container 1 and the horizontal branch pipe 5 and in the bus container 2 and the horizontal branch pipe 6.
[0013]
A vertical circuit breaker 11 is accommodated in a cylindrical circuit breaker container 10. A horizontal branch pipe 12 is formed on the right side of the circuit breaker container 10 in the figure (on the cable container 14 side). An insulating gas is hermetically sealed inside the circuit breaker container 10 and the horizontal branch pipe 12. The bus side of the circuit breaker 11 is connected to the three-position disconnectors 7 and 8 by a main circuit conductor 19.
[0014]
A current transformer 28 for detecting a bus-side current of the circuit breaker 11 is arranged in the circuit breaker container 10. Current transformer 28 is attached to main circuit conductor 19. A current transformer 27 for detecting a line-side current of the circuit breaker 11 is disposed in the horizontal branch pipe 12 of the circuit breaker container 10. Current transformer 27 is attached to main circuit conductor 19.
[0015]
A horizontal branch pipe 15 connected to the circuit breaker container 10 is formed on the left side of the cylindrical cable container 14 (on the circuit breaker container side) in the drawing. A three-position disconnector 16 on the line side of the vertical circuit breaker 11 is housed in the horizontal branch pipe 15. The bus-side end of the three-position disconnector 16 is connected to the line side of the circuit breaker 11 by a main circuit conductor 19. The line-side end of the three-position disconnector 16 is connected to a cable head 20 via a cable disconnecting device 25 by a main circuit conductor 19.
[0016]
A branch pipe 17 is formed on the right side in the drawing below the horizontal branch pipe 15 of the cable container 14. The branch pipe 17 is provided with a disconnecting device 22 for performing a DC withstand voltage test of a cable drawn from the power system, and a DC withstand voltage test terminal 23 is provided. The DC withstand voltage test of the power system cable is performed with the disconnecting device 22 turned on and the cable disconnecting device 25 turned off.
[0017]
An instrument transformer 26 is mounted and arranged above the cable container 14, and a grounding switch 24 is mounted below the horizontal branch pipe 15. A sealed container of the cable container 14, the horizontal branch pipe 15, and the branch pipe 17 is formed, and an insulating gas is sealed therein.
[0018]
As shown in FIG. 2, the gas insulated switchgear configured as described above has a bus vessel horizontal branch pipe 5, a circuit breaker vessel 10, a cable vessel horizontal branch pipe 12, and a cable vessel 14 arranged in a straight line.
[0019]
FIG. 3 shows a single-line connection diagram of the gas-insulated switchgear. The main circuit conductor 19 introduced through the cable head 20 is connected to the line side end of the circuit breaker 11 via a cable disconnecting device 25 and a three-position disconnector 16. One end of a DC withstand voltage test port 23 and one end of a grounding switch 24 are connected between the cable head 20 and the cable disconnection device 25 via a DC withstand voltage test disconnection device 22.
[0020]
An instrument transformer 26 is connected to the line side of the three-position disconnector 16, and a current transformer 27 is provided between the three-position disconnector 16 and the circuit breaker 11. The bus-side end of the circuit breaker 11 is connected to the main bus 3 or 4 via three-position disconnectors 7 and 8.
[0021]
FIG. 4 shows an example of a three-position disconnector 16. FIG. 4 shows one phase.
[0022]
One end of the fixed-side conductor 30 is connected to the main circuit conductor 19, and the other end of the fixed-side conductor 30 is in contact with the rotating end (the other end) of the blade 31. One end of the blade 31 is rotatably supported by the movable-side conductor 32.
[0023]
The blade 31 is mechanically connected to a rotary lever 34 via an insulating operation rod 33. A ground terminal 35 is attached to the lower surface of the horizontal branch pipe 15 of the cable container 14.
[0024]
When the rotary lever 34 is rotated by an operating device (not shown), the blade 31 rotates around the support point of the movable-side conductor 32 via the insulating operating rod 33. FIG. 4 shows a state in which the blade 31 is in contact with the fixed-side conductor 30 and the disconnector is “ON”. When the blade 31 rotates clockwise from the state of FIG. 4 and comes into contact with the ground terminal 35, the state of the ground switch “ON” is established. When the blade 31 is located between the fixed-side conductor 30 and the ground terminal 35, the disconnector and the grounding switch are turned off.
[0025]
FIG. 5 shows an example of a three-position disconnector 7. FIG. 5 shows one phase. The three-position disconnector 8 has the same configuration as the three-position disconnector 7.
[0026]
One end of the fixed-side conductor 40 is connected to the main bus 3, and the other end of the fixed-side conductor 40 is in contact with the rotating end (the other end) of the blade 41. One end of the blade 41 is rotatably supported by the movable conductor 42. The movable conductor 42 is connected to the main circuit conductor 19.
[0027]
The blade 41 is mechanically connected to a rotating lever 44 via an insulating operation rod 43. A ground terminal 45 is attached to the upper surface of the horizontal branch pipe 5 of the busbar 1.
[0028]
When the rotary lever 44 is rotated by an operating device (not shown) in the same manner as the three-position disconnector 16 shown in FIG. Rotate around the support point of. FIG. 5 shows a state in which the blade 41 is in contact with the fixed-side conductor 40 and the disconnector is “ON”. When the blade 41 rotates clockwise from the state of FIG. 5 and comes into contact with the ground terminal 45, the ground switch is turned on. When the blade 41 is located between the fixed side conductor 40 and the ground terminal 45, the disconnecting switch and the grounding switch are turned off.
[0029]
The gas insulated switchgear of the present invention is configured as described above. When performing maintenance and inspection of the circuit breaker 11, the three-position disconnector 16 on the track side and the three-position disconnectors 7 and 8 on the bus side are connected. This is performed with the grounding switch "on" or with the disconnector and grounding switch "off".
[0030]
As described above, in the gas insulated switchgear of the present invention, since the three-position disconnector on the circuit breaker line side is arranged in the horizontal branch pipe formed in the cable container and connected to the circuit breaker container, the height of the cable container can be reduced. Further, it is possible to reduce costs including a building in which the gas insulated switchgear is installed.
[0031]
Also, by shortening the length of the cable container, the overall height of the gas insulated switchgear can be reduced, so that there is a practical effect that a space for terminal processing work of the power cable can be secured. it can.
[0032]
Further, in the above-described embodiment, since the horizontal branch pipe is provided in the circuit breaker container and the line-side current transformer is housed and arranged, the line-side current transformer can be attached to the main circuit conductor stretched linearly. Installation of the line side current transformer can be easily performed.
[0033]
In the above-described embodiment, the horizontal branch pipe is provided in the circuit breaker container and the line side current transformer is housed and arranged. However, if the line side current transformer can be housed and arranged in the circuit breaker container body, the horizontal branch pipe is provided in the circuit breaker container. It is clear that there is no need to provide.
[0034]
【The invention's effect】
According to the present invention, since the three-position disconnector on the circuit breaker line side is arranged in the horizontal branch pipe formed in the cable container and connected to the circuit breaker container, the height of the cable container can be reduced and the gas insulated switchgear is installed. Costs including the building can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional device arrangement configuration diagram showing an embodiment of the present invention.
FIG. 2 is a plan view of a device arrangement showing an embodiment of the present invention.
FIG. 3 is a single-wire connection diagram of one embodiment of the present invention.
FIG. 4 is a configuration diagram illustrating an example of a three-position disconnector.
FIG. 5 is a configuration diagram showing another example of a three-position disconnector.
[Explanation of symbols]
1, 2 ... bus container, 3, 4 ... main bus, 5, 6 ... bus container horizontal branch pipe, 7, 8, 16 ... 3-position disconnector, 10 ... circuit breaker container, 11 ... circuit breaker, 12 ... circuit breaker Container horizontal branch pipe, 14 ... cable container, 15 ... cable container horizontal branch pipe, 17 ... branch pipe, 19 ... main circuit conductor, 20 ... cable head, 22 ... disconnection device for DC withstand voltage test, 23: DC withstand voltage test terminal, 24: Ground switch, 25: Cable disconnecting device, 26: Instrument transformer, 27, 28: Current transformer.

Claims

A circuit breaker container in which a circuit breaker is housed and arranged; a bus container in which a main bus is stretched and connected to the circuit breaker container through a horizontal branch tube; and three positions housed and arranged in the bus line container horizontal branch tube A cable container which is formed with a horizontal branch pipe connected to the circuit breaker container and draws a cable from an electric power system, and a three-position disconnector housed in the horizontal branch pipe for the cable container. A gas-insulated switchgear, comprising:

A circuit breaker container in which a circuit breaker is housed and arranged; a bus container in which a main bus is stretched and connected to the circuit breaker container through a horizontal branch tube; and three positions housed and arranged in the bus line container horizontal branch tube A cable container which is formed with a horizontal branch pipe connected to the circuit breaker container and draws a cable from an electric power system, and a three-position disconnector housed in the horizontal branch pipe for the cable container. A gas insulated switchgear, comprising: the busbar vessel horizontal branch pipe, the circuit breaker vessel, the cable vessel horizontal branch pipe, and the cable vessel arranged in a straight line.

A circuit breaker container in which a vertical circuit breaker is housed and arranged, a bus container in which a main bus is stretched and housed and connected to the circuit breaker container through a horizontal branch tube, and housed in the bus container horizontal branch tube A cable container having a three-position disconnector on the vertical circuit breaker bus side, a cable branch having a horizontal branch pipe connected to the circuit breaker container, and having a cable head for drawing a cable from an electric power system; A gas insulated switchgear comprising: a three-position disconnector on the side of the vertical circuit breaker line housed and arranged in a branch pipe.

A vertical circuit breaker is housed and arranged, a circuit breaker container in which a horizontal branch pipe is formed, a current transformer on the vertical circuit breaker bus side housed and arranged in the circuit breaker container, and the circuit breaker container horizontal branch pipe. A current transformer on the side of the vertical circuit breaker line to be housed and arranged; a bus container in which a main bus is stretched and housed and connected to the circuit breaker container via a horizontal branch tube; and a housing arranged in the bus container horizontal branch tube And a horizontal branch pipe connected to the horizontal branch pipe of the circuit breaker vessel, and a power transformer in which an instrument transformer is mounted on the upper part. A gas insulated switchgear comprising: a cable container into which a cable is drawn; and a three-position disconnector on the side of the vertical circuit breaker line housed and disposed in the horizontal branch pipe of the cable container.

A circuit breaker container in which a vertical circuit breaker is housed and arranged and a horizontal branch tube is formed, and two bus line containers in which main buses are respectively stretched and housed and connected to the circuit breaker container via the horizontal branch tube, respectively. And two three-position disconnectors on the vertical circuit breaker bus side respectively housed and arranged in the two busbar vessel horizontal branch pipes, and a horizontal branch pipe connected to the circuit breaker vessel horizontal branch pipe, A cable container having a cable head for drawing a cable from an electric power system, and a three-position disconnector on the side of the vertical circuit breaker line accommodated in the horizontal branch pipe of the cable container. Gas insulated switchgear.

A vertical circuit breaker is housed and arranged, a circuit breaker container in which a horizontal branch pipe is formed, a current transformer on the vertical circuit breaker bus side housed and arranged in the circuit breaker container, and the circuit breaker container horizontal branch pipe. The current transformers on the side of the vertical circuit breaker track to be housed and arranged, two buses housing main buses stretched and housed respectively, and each connected to the circuit breaker housing via a horizontal branch pipe; Two 3-position disconnectors on the bus side of the vertical circuit breaker respectively housed and arranged in the horizontal branch pipe of the bus container, and a horizontal branch pipe connected to the horizontal branch pipe of the circuit breaker container are formed. A cable container on which a cable is mounted and at least a cable disconnecting device, a grounding switch, and a cable head are housed and arranged, and a cable container for drawing a cable from an electric power system is housed and arranged in the horizontal branch pipe of the cable container. The vertical circuit breaker Gas-insulated switchgear apparatus characterized by comprising a three-position type disconnector roadside.