JP4908302B2

JP4908302B2 - Gas insulated switchgear

Info

Publication number: JP4908302B2
Application number: JP2007117209A
Authority: JP
Inventors: 祐一山地; 直明井上
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2007-04-26
Filing date: 2007-04-26
Publication date: 2012-04-04
Anticipated expiration: 2027-04-26
Also published as: JP2008278593A

Description

この発明は、電力の送配電および受電設備に用いられるガス絶縁開閉装置に関するものである。 The present invention relates to a gas-insulated switchgear used in power transmission / distribution and power reception facilities.

図５は従来の例えば特許文献１に記載されたガス絶縁開閉装置１の構成を示す側面断面図である。母線タンク２、受電ユニットタンク３、及び変圧器ユニットタンク４は、ガス区分をする絶縁スペーサ６で仕切られ、縦方向に積み上げられ、端子を通して相互が電気的に接続されている。中央の母線タンク２には母線ＢＵＳと共に断路器ＤＳが２台搭載されている。母線タンク２の上方の変圧器ユニットタンク４には、遮断器ＣＢと２台の接地開閉器ＥＳが搭載され、遮断器ＣＢから後面の変圧器接続容器１６の端子に接続されている。 FIG. 5 is a side sectional view showing a configuration of a conventional gas insulated switchgear 1 described in, for example, Patent Document 1. As shown in FIG. The bus tank 2, the power receiving unit tank 3, and the transformer unit tank 4 are partitioned by an insulating spacer 6 that separates gases, stacked in the vertical direction, and are electrically connected to each other through terminals. The central bus tank 2 is equipped with two disconnectors DS together with the bus BUS. The transformer unit tank 4 above the bus tank 2 is equipped with a circuit breaker CB and two ground switches ES, and is connected from the circuit breaker CB to a terminal of the transformer connection container 16 on the rear surface.

母線タンク２の下方の受電ユニットタンク３には、遮断器ＣＢ,２台の接地開閉器ＥＳ,断路器ＤＳ,接地開閉器ＥＳ及び避雷器ＬＡが搭載されている。その遮断器ＣＢから断路器ＤＳを介して後面のケーブル引き込み部１５に接続される。ケーブル引き込み部１５には、ケーブルのケーブルヘッドＣＨＤが接続されている。ケーブルには変流器ＣＴが設けられている。ガス絶縁開閉装置１の前面には、操作盤１３が配置されている。 The power receiving unit tank 3 below the bus tank 2 is equipped with a circuit breaker CB, two grounding switches ES, a disconnect switch DS, a grounding switch ES, and a lightning arrester LA. The circuit breaker CB is connected to the cable lead-in portion 15 on the rear surface via the disconnector DS. A cable head CHD of the cable is connected to the cable drawing portion 15. The cable is provided with a current transformer CT. An operation panel 13 is disposed on the front surface of the gas insulated switchgear 1.

上段で後面の変圧器接続容器１６には、アダプタが固定されており、そのアダプタに変圧器に接続されるケーブルを接続することにより、下段のケーブルと干渉しない構造となっている。 An adapter is fixed to the transformer connection container 16 on the rear surface in the upper stage, and the cable connected to the transformer is connected to the adapter so that it does not interfere with the cable in the lower stage.

特開２００４−２１５３９２号公報（図６）JP 2004-215392 A (FIG. 6)

従来のガス絶縁開閉装置は、上段の変圧器ユニットタンク４及び下段の受電ユニットタンク３に、それぞれケーブルが接続される場合、上段のケーブルが下段のケーブルに干渉しないよう上段のケーブル接続部（変圧器接続容器１６）にはアダプタを固定している。したがって、上段のケーブル接続部にアダプタが接続された分、ガス絶縁開閉装置の奥行き方向（前後方向）の寸法が大きくなるという問題点があった。
この発明は、上記のような問題点を解消するためになされたもので、ガス絶縁開閉装置の奥行き寸法を縮小化した装置を得ることを目的とする。 In the conventional gas insulated switchgear, when the cables are connected to the upper transformer unit tank 4 and the lower power receiving unit tank 3, respectively, the upper cable connecting portion (transformer) is arranged so that the upper cable does not interfere with the lower cable. An adapter is fixed to the container connection container 16). Accordingly, there is a problem that the dimension in the depth direction (front-rear direction) of the gas-insulated switchgear is increased by the amount of the adapter connected to the upper cable connection portion.
The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a device in which the depth dimension of a gas insulated switchgear is reduced.

この発明に係わるガス絶縁開閉装置は、絶縁性ガスを封入し内部に断路器と共に母線を収納した中段ガス区画室、絶縁性ガスを封入し前記中段ガス区画室と区画されブッシングを介して前記母線と接続される第１真空遮断器を収納した上段ガス区画室、絶縁性ガスを封入し前記中段ガス区画室と区画されブッシングを介して前記母線と接続される第２真空遮断器を収納した下段ガス区画室、前記上段ガス区画室と前記中段ガス区画室と前記下段ガス区画室を収納する接地電位の筐体、前記上段ガス区画室の前記第１真空遮断器に接続され、前記上段ガス区画室の裏面部に設けられ、計器用変流器が取り付けられた上段ケーブルブッシング、前記下段ガス区画室の前記第２真空遮断器に接続され、前記下段ガス区画室の裏面部に設けられ、計器用変流器が取り付けられる前記上段ケーブルブッシングと同じ大きさの下段ケーブルブッシング、前記上段ケーブルブッシングに接続され、前記筐体内で前記ガス区画室外の一方の側部側に沿わせて配線した第１ケーブル、及び、前記下段ケーブルブッシングに接続され、前記筐体内で前記ガス区画室外の他方の側部側に沿わせて配線した第２ケーブルを備え、前記上段ガス区画室の前記上段ケーブルブッシングの取り付け位置に前記上段ガス区画室内側に窪んだ凹部を設け、この凹部に前記計器用変流器を取り付けた前記上段ケーブルブッシングを取り付けると共に、前記下段ガス区画室の前記下段ケーブルブッシングの取り付け位置に前記下段ガス区画室内側に窪んだ凹部を設け、この凹部に前記計器用変流器を取り付けた前記下段ケーブルブッシングを取り付けるようにしたものである。
また、この発明に係わるガス絶縁開閉装置は、絶縁性ガスを封入し内部に断路器と共に母線を収納した中段ガス区画室、絶縁性ガスを封入し前記中段ガス区画室と区画されブッシングを介して前記母線と接続される第１真空遮断器を収納した上段ガス区画室、絶縁性ガスを封入し前記中段ガス区画室と区画されブッシングを介して前記母線と接続される第２真空遮断器を収納した下段ガス区画室、前記上段ガス区画室と前記中段ガス区画室と前記下段ガス区画室を収納する接地電位の筐体、前記上段ガス区画室の前記第１真空遮断器に接続され、前記上段ガス区画室の裏面部に設けられ、計器用変流器が取り付けられた上段ケーブルブッシング、前記下段ガス区画室の前記第２真空遮断器に接続され、前記下段ガス区画室の裏面部に設けられ、計器用変流器が取り付けられる前記上段ケーブルブッシングと同じ大きさの下段ケーブルブッシング、前記上段ケーブルブッシングに接続され、前記筐体内で前記ガス区画室外の一方の側部側に沿わせて配線した第１ケーブル、及び、前記下段ケーブルブッシングに接続され、前記筐体内で前記ガス区画室外の他方の側部側に沿わせて配線した第２ケーブルを備え、前記上段ガス区画室の前記上段ケーブルブッシングの取り付け位置に開口を設け、前記上段ケーブルブッシングと前記計器用変流器を固定したフレームを前記開口に取り付け、前記フレームで前記開口をシールすると共に、前記下段ガス区画室の前記下段ケーブルブッシングの取り付け位置に開口を設け、前記下段ケーブルブッシングと前記計器用変流器を固定したフレームを前記開口に取り付け、前記フレームで前記開口をシールするようにしたものである。
The gas-insulated switchgear according to the present invention includes an intermediate gas compartment in which an insulating gas is enclosed and a busbar is housed together with a disconnector, an insulating gas is enclosed in the middle gas compartment and the busbar is partitioned through a bushing. The upper gas compartment containing the first vacuum circuit breaker connected to the lower gas chamber, the lower stage containing the second vacuum circuit breaker enclosed with the insulating gas and connected to the bus bar through the bushing. A gas compartment, an upper gas compartment, a middle gas compartment, and a lower-potential housing for housing the lower gas compartment; the upper gas compartment connected to the first vacuum circuit breaker of the upper gas compartment; An upper cable bushing provided with an instrument current transformer, connected to the second vacuum circuit breaker of the lower gas compartment, and provided at the rear face of the lower gas compartment, A lower cable bushing having the same size as the upper cable bushing to which a current transformer is attached, a first cable connected to the upper cable bushing and routed along one side outside the gas compartment in the housing And a second cable connected to the lower cable bushing and routed along the other side outside the gas compartment in the housing, and the upper cable bushing mounting position in the upper gas compartment The upper gas compartment is provided with a recessed portion recessed on the inner side of the upper gas compartment, and the upper cable bushing to which the instrument current transformer is attached is attached to the concave portion, and the lower stage of the lower gas bushing is attached to the lower stage of the lower gas compartment. The lower case is provided with a recessed portion recessed on the gas compartment chamber side, and the current transformer for the instrument is attached to the recessed portion. It is obtained so as to attach the Le bushing.
The gas insulated switchgear according to the present invention includes an intermediate gas compartment chamber in which an insulating gas is enclosed and a bus bar is housed together with a disconnector, and an insulating gas is enclosed in the middle gas compartment chamber, which is partitioned through the bushing. An upper gas compartment containing a first vacuum circuit breaker connected to the bus bar, and a second vacuum circuit breaker enclosed with an insulating gas and separated from the middle gas compartment chamber and connected to the bus bar via a bushing The upper gas compartment, the upper gas compartment, the middle gas compartment, and the lower gas compartment, which are connected to the first vacuum circuit breaker of the upper gas compartment, Provided on the back of the gas compartment, connected to the upper cable bushing with the instrument current transformer attached to the second vacuum circuit breaker of the lower gas compartment, and provided on the back of the lower gas compartment A lower cable bushing having the same size as the upper cable bushing to which the current transformer for the instrument is attached, connected to the upper cable bushing, and wired along one side outside the gas compartment in the casing. 1 cable and a second cable connected to the other side of the gas compartment in the casing and connected to the other side of the gas compartment, the upper cable bushing of the upper gas compartment An opening is provided at the attachment position, a frame to which the upper cable bushing and the current transformer for instrumentation are fixed is attached to the opening, the opening is sealed with the frame, and the lower cable bushing in the lower gas compartment is attached. A frame in which an opening is provided at a position and the lower cable bushing and the current transformer for the instrument are fixed Attached to said opening, in which so as to seal the opening in the frame.

この発明のガス絶縁開閉装置によれば、上段ガス区画室の裏面部に設けられた上段ケーブルブッシングと、下段ガス区画室の裏面部に設けられる下段ケーブルブッシングとを同じ大きさにし、上段ケーブルブッシングに接続される第１ケーブルを筐体内でガス区画室外の一方の側部側に沿わせて配線し、下段ケーブルブッシングに接続される第２ケーブルを筐体内でガス区画室外の他方の側部側に沿わせて配線したので、第１ケーブルが第２ケーブルと干渉することを防ぎ、ガス絶縁開閉装置の奥行き寸法を縮小化することができる。そして、前記上段ガス区画室の前記上段ケーブルブッシングの取り付け位置に前記上段ガス区画室内側に窪んだ凹部を設け、この凹部に計器用変流器を取り付けた前記上段ケーブルブッシングを取り付けると共に、前記下段ガス区画室の前記下段ケーブルブッシングの取り付け位置に前記下段ガス区画室内側に窪んだ凹部を設け、この凹部に計器用変流器を取り付けた前記下段ケーブルブッシングを取り付けるものであり、これにより、ガス絶縁開閉装置の奥行き寸法をさらに縮小化することができる。
又は、前記上段ガス区画室の前記上段ケーブルブッシングの取り付け位置に開口を設け、前記上段ケーブルブッシングと計器用変流器を固定したフレームを前記開口に取り付け、前記フレームで前記開口をシールすると共に、前記下段ガス区画室の前記下段ケーブルブッシングの取り付け位置に開口を設け、前記下段ケーブルブッシングと計器用変流器を固定したフレームを前記開口に取り付け、前記フレームで前記開口をシールするものであり、これにより、ガス絶縁開閉装置の奥行き寸法をさらに縮小化することができる。 According to the gas insulated switchgear of the present invention, the upper cable bushing provided on the back surface portion of the upper gas compartment and the lower cable bushing provided on the back surface of the lower gas compartment are made the same size, The first cable connected to the cable is routed along one side outside the gas compartment in the casing, and the second cable connected to the lower cable bushing is arranged outside the gas compartment in the casing on the other side. Therefore, the first cable can be prevented from interfering with the second cable, and the depth dimension of the gas insulated switchgear can be reduced. Then, a concave portion recessed in the upper gas compartment chamber is provided at the attachment position of the upper cable bushing in the upper gas compartment, and the upper cable bushing with the instrument current transformer is attached to the concave portion, and the lower stage The lower cable bushing in the gas compartment is provided with a recessed portion recessed in the lower gas compartment, and the lower cable bushing with the instrument current transformer attached is attached to the recessed portion. The depth dimension of the insulated switchgear can be further reduced.
Or, an opening is provided at the attachment position of the upper cable bushing in the upper gas compartment, and a frame in which the upper cable bushing and an instrument current transformer are fixed is attached to the opening, and the opening is sealed with the frame, An opening is provided at the attachment position of the lower cable bushing in the lower gas compartment, the frame in which the lower cable bushing and the current transformer for instrument are fixed is attached to the opening, and the opening is sealed with the frame. Thereby, the depth dimension of the gas insulated switchgear can be further reduced.

実施の形態１．
図１はこの発明の実施の形態１であるガス絶縁開閉装置を示す図で、その（ａ）は側面断面図、その（ｂ）は筐体の裏板を取り除いたときの様子を示す裏面図である。ガス絶縁開閉装置２１は、接地電位の筐体２２内にＳＦ_６，乾燥空気，窒素，二酸化炭素などの絶縁性ガスを封入したガス区画室を有している。ガス区画室は上下方向に上段ガス区画室２３、中段ガス区画室２４、下段ガス区画室２５を有し、それらは、絶縁スペーサ２６，２７で区画されている。中段ガス区画室２４には、絶縁性ガスが封入され、母線２８と共に断路器／接地開閉器２９，３０が収納されている。母線２８の両端には、断路器／接地開閉器２９，３０が接続され、図では、両断路器／接地開閉器２９，３０とも中立状態を示し、枢軸３１を中心にバーを紙面に向かって右側に回動すると断路器が閉じ、左側に回動すると接地開閉器ＥＳが閉じる。３２は両断路器／接地開閉器２９，３０の操作機である。 Embodiment 1 FIG.
1 is a view showing a gas insulated switchgear according to Embodiment 1 of the present invention, in which (a) is a side sectional view, and (b) is a back view showing a state when a back plate of a housing is removed. It is. The gas insulated switchgear 21 has a gas compartment in which an insulating gas such as SF ₆ , dry air, nitrogen, carbon dioxide, etc. is sealed in a casing 22 having a ground potential. The gas compartment has an upper gas compartment 23, a middle gas compartment 24, and a lower gas compartment 25 in the vertical direction, which are partitioned by insulating spacers 26 and 27. The middle gas compartment 24 is filled with an insulating gas, and a disconnector / grounding switch 29, 30 is accommodated together with the bus 28. Disconnectors / grounding switches 29, 30 are connected to both ends of the bus bar 28. In the figure, both disconnectors / grounding switches 29, 30 are in a neutral state, with the bar centering on the pivot 31 toward the paper surface. When it is turned to the right, the disconnect switch is closed, and when it is turned to the left, the ground switch ES is closed. Reference numeral 32 denotes an operating device for both disconnectors / grounding switches 29 and 30.

上段ガス区画室２３には、絶縁性ガスが封入され、絶縁スペーサ２６に設けたブッシング３３を介して、母線２８と接続される第１真空開閉器３４が収納される。上段ガス区画室２３の裏面部には、第１真空開閉器３４と接続される上段ケーブルブッシング３５が設けられている。３６は上段ケーブルブッシング３５を囲んで設けた計器用変流器である。
４１は第１真空開閉器３４の操作機である。 The upper gas compartment 23 is filled with an insulating gas, and a first vacuum switch 34 connected to the bus bar 28 via a bushing 33 provided on the insulating spacer 26 is accommodated. An upper cable bushing 35 connected to the first vacuum switch 34 is provided on the back surface of the upper gas compartment 23. Reference numeral 36 denotes an instrument current transformer provided so as to surround the upper cable bushing 35.
Reference numeral 41 denotes an operating device for the first vacuum switch 34.

下段ガス区画室２５には、絶縁性ガスが封入され、絶縁スペーサ２７に設けたブッシング３７を介して、母線２８と接続される第２真空開閉器３８が収納される。下段ガス区画室２５の裏面部には、第２真空開閉器３８と接続される下段ケーブルブッシング３９が設けられている。下段ケーブルブッシング３９は上段ケーブルブッシング３５と同一サイズで同規格のものである。４０は下段ケーブルブッシング３９を囲んで設けた計器用変流器である。４２は第２真空開閉器３８の操作機である。 The lower gas compartment 25 contains a second vacuum switch 38 that is filled with an insulating gas and connected to the bus bar 28 via a bushing 37 provided on the insulating spacer 27. A lower cable bushing 39 connected to the second vacuum switch 38 is provided on the back surface of the lower gas compartment 25. The lower cable bushing 39 has the same size and the same standard as the upper cable bushing 35. Reference numeral 40 denotes an instrument current transformer provided to surround the lower cable bushing 39. Reference numeral 42 denotes an operating device for the second vacuum switch 38.

４３は上段ケーブルブッシング３５に接続された第１ケーブルで、裏面図（ｂ）に示すように、筐体２２内で上中下段ガス区分室２３，２４，２５外の裏面４５と筐体２２の裏板４６との空間に筐体２２内の一方の側部側に沿わせて配線され保持されている。４７は筐体２２の裏板４６に固定したフレーム４８に取付けた第１ケーブル４３の保持金具である。第１ケーブル４３は筐体２２内で上中下段ガス区分室２３，２４，２５外の上中下段ガス区分室２３，２４，２５の側面の一方に沿わせて配線され保持されていてもよい。第１ケーブル４３は筐体２２の底部から外部に出て変圧器（図示せず）又は負荷に接続される。 Reference numeral 43 denotes a first cable connected to the upper cable bushing 35. As shown in a rear view (b), the rear surface 45 outside the upper, middle, and lower gas compartments 23, 24, and 25 in the housing 22 and the housing 22 are provided. Wiring is held in the space with the back plate 46 along one side in the housing 22 and held. Reference numeral 47 denotes a holding bracket for the first cable 43 attached to a frame 48 fixed to the back plate 46 of the housing 22. The first cable 43 may be wired and held along one of the side surfaces of the upper, middle, and lower gas compartments 23, 24, and 25 outside the upper, middle, and lower gas compartments 23, 24, 25 in the housing 22. . The first cable 43 exits from the bottom of the housing 22 and is connected to a transformer (not shown) or a load.

４４は下段ケーブルブッシング３９に接続された第２ケーブルで、裏面図（ｂ）に示すように、筐体２２内で上中下段ガス区分室２３，２４，２５外の裏面４５と筐体２２の裏板４６との空間に筐体２２内の他方の側部側に沿わせて配線され保持されている。４９は筐体２２の裏板４６に固定したフレーム５０に取付けた第２ケーブル４４の保持金具である。５５は零相変流器である。第２ケーブル４４は筐体２２内で上中下段ガス区分室２３，２４，２５外の上中下段ガス区分室２３，２４，２５の側面の他方に沿わせて配線され保持されていてもよい。第２ケーブル４４は筐体２２の底部から外部に出て負荷に接続される。図１（ａ）では、第１ケーブル４３と第２ケーブル４４は一部破線で示し、ケーブルブッシングの先端を示すようにしている。図１（ｂ）では、第１ケーブル４３と第２ケーブル４４とケーブルブッシングとの接続を省略して示している。 Reference numeral 44 denotes a second cable connected to the lower cable bushing 39. As shown in the rear view (b), the rear surface 45 of the upper, middle and lower gas compartments 23, 24, 25 outside the casing 22 and the casing 22 are provided. Wiring is held in the space with the back plate 46 along the other side of the housing 22 and held. Reference numeral 49 denotes a holding fitting for the second cable 44 attached to the frame 50 fixed to the back plate 46 of the housing 22. 55 is a zero phase current transformer. The second cable 44 may be wired and held along the other of the side surfaces of the upper, middle, and lower gas compartments 23, 24, and 25 outside the upper, middle, and lower gas compartments 23, 24, 25 in the housing 22. . The second cable 44 exits from the bottom of the housing 22 and is connected to the load. In FIG. 1 (a), the first cable 43 and the second cable 44 are partially shown by broken lines so as to indicate the tips of the cable bushings. In FIG. 1B, the connection between the first cable 43, the second cable 44, and the cable bushing is omitted.

このように、上段ガス区分室２３の裏面部に設けた上段ケーブルブッシング３５と下段ガス区分室２５の裏面部に設けた下段ケーブルブッシング３９を同じ規格で長さも同じにすることで、部品の共用化が図られる。筐体２２内で第１ケーブル４３を上中下段ガス区分室２３，２４，２５外の一方の側部側に沿わせて配線され保持させ、筐体２２内で第２ケーブル４４を上中下段ガス区分室２３，２４，２５外の他方の側部側に沿わせて配線され保持させているので、第１ケーブル４３が第２ケーブル４４に干渉することを防止でき、ガス絶縁開閉装置の奥行き寸法を縮小化することができる。 In this way, the upper cable bushing 35 provided on the rear surface of the upper gas compartment 23 and the lower cable bushing 39 provided on the rear surface of the lower gas compartment 25 have the same standard and the same length, so that parts can be shared. Is achieved. The first cable 43 is wired and held along one side of the upper, middle, and lower gas compartments 23, 24, and 25 in the housing 22, and the second cable 44 is held in the housing 22 at the upper, middle, and lower stages. The first cable 43 can be prevented from interfering with the second cable 44 because it is wired and held along the other side of the gas compartments 23, 24, 25, and the depth of the gas insulated switchgear can be reduced. The dimensions can be reduced.

実施の形態２．
図２は実施の形態２であるガス絶縁開閉装置を示す側面断面図である。なお、各図中同一符号は同一又は相当部分を示す。実施の形態２において、実施の形態１に対して異なる部分を主に説明する。上段ガス区画室２３の上段ケーブルブッシング３５の取り付け位置に上段ガス区画室２３内側に窪んだ凹部５１を設け、この凹部５１に計器用変流器３６を取り付けた上段ケーブルブッシング３５を取り付ける。同様に、下段ガス区画室２５の下段ケーブルブッシング３９の取り付け位置に下段ガス区画室２５内側に窪んだ凹部５２を設け、この凹部５２に計器用変流器４０を取り付けた下段ケーブルブッシング３９を取り付ける。 Embodiment 2. FIG.
FIG. 2 is a side sectional view showing a gas insulated switchgear according to the second embodiment. In the drawings, the same reference numerals indicate the same or corresponding parts. In the second embodiment, differences from the first embodiment will be mainly described. A recessed portion 51 that is recessed inside the upper gas compartment 23 is provided at the attachment position of the upper cable bushing 35 of the upper gas compartment 23, and the upper cable bushing 35 to which the current transformer 36 is attached is attached to the recessed portion 51. Similarly, a recessed portion 52 that is recessed inside the lower gas compartment 25 is provided at the mounting position of the lower gas bushing 39 of the lower gas compartment 25, and the lower cable bushing 39 to which the current transformer 40 is attached is attached to the recessed portion 52. .

このように、ガス区画室内側に窪んだ凹部５１，５２を設け、この凹部５１，５２に計器用変流器を取り付けたケーブルブッシング３５，３９を取り付けることにより、計器用変流器を取り付けたケーブルブッシング３５，３９の固定位置が正面側に寄り、ケーブル４３，４４の接続位置も正面側に寄せることが可能となる。これにより、ガス絶縁開閉装置の奥行き寸法をさらに縮小化することができる。 As described above, the recessed portions 51 and 52 that are recessed on the gas compartment chamber side are provided, and the cable current bushing 35 and 39 with the instrumental current transformer are attached to the recessed portions 51 and 52, thereby attaching the instrumental current transformer. The fixing positions of the cable bushings 35 and 39 are closer to the front side, and the connection positions of the cables 43 and 44 can be closer to the front side. Thereby, the depth dimension of the gas insulated switchgear can be further reduced.

実施の形態３．
図３は実施の形態３であるガス絶縁開閉装置を示す側面断面図である。実施の形態３において、実施の形態１に対して異なる部分を主に説明する。上段ガス区画室２３の裏面部の上段ケーブルブッシング３５の取り付け位置に開口６１を設け、上段ケーブルブッシング３５と計器用変流器３６をフレーム６２に固定し、上段ケーブルブッシング３５と計器用変流器３６を固定したフレーム６２を開口６１に取り付け、開口６１の周囲をフレーム６２に設けたシール部でシールする。そして、フレーム６２は上段ガス区画室２３内側に窪んでいる。 Embodiment 3 FIG.
FIG. 3 is a side sectional view showing a gas insulated switchgear according to a third embodiment. In the third embodiment, differences from the first embodiment will be mainly described. An opening 61 is provided at the attachment position of the upper cable bushing 35 on the back surface of the upper gas compartment 23, the upper cable bushing 35 and the instrument current transformer 36 are fixed to the frame 62, and the upper cable bushing 35 and the instrument current transformer are fixed. A frame 62 to which 36 is fixed is attached to the opening 61, and the periphery of the opening 61 is sealed with a seal portion provided on the frame 62. The frame 62 is recessed inside the upper gas compartment 23.

図４は実施の形態３による上段ケーブルブッシング３５の取り付け位置の拡大断面図である。上段ケーブルブッシング３５と計器用変流器３６を固定したフレーム６２は、開口６１の周縁部に溶接されたスタッド６５にフレーム６２の対応箇所に設けた孔を嵌め込んで、ナット６６で固定されている。６７はガイド板であり、６８はパッキンで開口６１の周縁部とフレーム６２の周縁部間をシールする。 FIG. 4 is an enlarged cross-sectional view of the attachment position of the upper cable bushing 35 according to the third embodiment. The frame 62 to which the upper cable bushing 35 and the instrument current transformer 36 are fixed is fixed by a nut 66 by fitting a hole provided at a corresponding position of the frame 62 into a stud 65 welded to the peripheral edge of the opening 61. Yes. 67 is a guide plate, and 68 is a packing that seals between the peripheral edge of the opening 61 and the peripheral edge of the frame 62.

同様に、下段ガス区画室２５の裏面部の下段ケーブルブッシング３９の取り付け位置に開口６３を設け、下段ケーブルブッシング３９と計器用変流器４０をフレーム６４に固定し、下段ケーブルブッシング３９と計器用変流器４０を固定したフレーム６４を開口６３に取り付け、開口６３の周囲をフレーム６４に設けたシール部でシールする。そして、フレーム６４は下段ガス区画室２５内側に窪んでいる。 Similarly, an opening 63 is provided at the attachment position of the lower cable bushing 39 on the rear surface of the lower gas compartment 25, the lower cable bushing 39 and the instrument current transformer 40 are fixed to the frame 64, and the lower cable bushing 39 and the instrument A frame 64 to which the current transformer 40 is fixed is attached to the opening 63, and the periphery of the opening 63 is sealed with a seal portion provided on the frame 64. The frame 64 is recessed inside the lower gas compartment 25.

このように構成することにより、実施の形態２と同様にガス絶縁開閉装置の奥行き寸法を縮小化することができると共に、ケーブルブッシングと計器用変流器を先にフレームに固定することができ、組立性を改善することができる。 By configuring in this way, the depth dimension of the gas insulated switchgear can be reduced as in the second embodiment, and the cable bushing and the current transformer for the instrument can be fixed to the frame first, Assemblability can be improved.

この発明の実施の形態１であるガス絶縁開閉装置を示す図で、（ａ）は側面断面図、（ｂ）は筐体の裏板を取り除いたときの様子を示す裏面図をある。BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the gas insulated switchgear which is Embodiment 1 of this invention, (a) is side sectional drawing, (b) is a back view which shows a mode when the backplate of a housing | casing is removed. 実施の形態２であるガス絶縁開閉装置を示す側面断面図である。It is side surface sectional drawing which shows the gas insulated switchgear which is Embodiment 2. FIG. 実施の形態３であるガス絶縁開閉装置を示す側面断面図である。It is side surface sectional drawing which shows the gas insulated switchgear which is Embodiment 3. 実施の形態３による上段ケーブルブッシングの取り付け位置の拡大断面図である。FIG. 9 is an enlarged cross-sectional view of an attachment position of an upper cable bushing according to Embodiment 3. 従来のガス絶縁開閉装置の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of the conventional gas insulated switchgear.

Explanation of symbols

２１ガス絶縁開閉装置２２筐体
２３上段ガス区画室２４中段ガス区画室
２５下段ガス区画室２６絶縁スペーサ
２７絶縁スペーサ２８母線
２９断路器／接地開閉器３０断路器／接地開閉器
３１枢軸３２操作機
３３ブッシング３４第１真空開閉器
３５上段ケーブルブッシング３６計器用変流器 DESCRIPTION OF SYMBOLS 21 Gas insulation switchgear 22 Case 23 Upper gas division chamber 24 Middle gas division chamber 25 Lower gas division chamber 26 Insulation spacer 27 Insulation spacer 28 Bus 29 Disconnector / earthing switch 30 Disconnector / grounding switch 31 Axis 32 Operating machine 33 Bushing 34 First vacuum switch 35 Upper cable bushing 36 Current transformer for instrument

３７ブッシング３８第２真空開閉器
３９下段ケーブルブッシング４０計器用変流器
４１操作機４２操作機
４３第１ケーブル４４第２ケーブル
５１凹部５２凹部
６１開口６２フレーム
６３開口６４フレーム
６５スタッド６６ナット
６７ガイド板６８パッキン 37 Bushing 38 Second Vacuum Switch 39 Lower Cable Bushing 40 Current Transformer for Instrument 41 Operating Unit 42 Operating Unit 43 First Cable 44 Second Cable 51 Concave 52 Concave 61 Opening 62 Frame 63 Opening 64 Frame 65 Stud 66 Nut 67 Guide Board 68 Packing

Claims

Middle gas compartment with encapsulating insulating gas and containing busbar with disconnector inside,
An upper gas compartment containing an insulating gas and containing a first vacuum circuit breaker that is partitioned from the middle gas compartment and connected to the bus via a bushing;
A lower gas compartment containing an insulating gas and containing a second vacuum circuit breaker that is partitioned from the middle gas compartment and connected to the bus via a bushing;
A ground potential housing that houses the upper gas compartment, the middle gas compartment, and the lower gas compartment, connected to the first vacuum circuit breaker of the upper gas compartment, and a back surface portion of the upper gas compartment An upper cable bushing with a current transformer attached to the instrument,
A lower cable bushing of the same size as the upper cable bushing connected to the second vacuum circuit breaker of the lower gas compartment, provided on the back surface of the lower gas compartment, and attached with a current transformer for an instrument,
A first cable connected to the upper cable bushing and routed along one side of the casing outside the gas compartment; and
A second cable connected to the lower cable bushing and wired along the other side of the casing outside the gas compartment ;
A concave portion recessed in the upper gas compartment chamber side is provided at the attachment position of the upper gas bushing in the upper gas compartment, and the upper cable bushing to which the current transformer for instrumentation is attached is attached to the concave portion,
A gas insulation in which a recessed portion that is recessed toward the lower gas compartment chamber side is provided at an attachment position of the lower cable bushing in the lower gas compartment, and the lower cable bushing to which the current transformer for instrumentation is attached is attached to the recessed portion. Switchgear.

Middle gas compartment with encapsulating insulating gas and containing busbar with disconnector inside,
An upper gas compartment containing an insulating gas and containing a first vacuum circuit breaker that is partitioned from the middle gas compartment and connected to the bus via a bushing;
A lower gas compartment containing an insulating gas and containing a second vacuum circuit breaker that is partitioned from the middle gas compartment and connected to the bus via a bushing;
A ground potential housing that houses the upper gas compartment, the middle gas compartment, and the lower gas compartment, connected to the first vacuum circuit breaker of the upper gas compartment, and a back surface portion of the upper gas compartment An upper cable bushing with a current transformer attached to the instrument,
A lower cable bushing of the same size as the upper cable bushing connected to the second vacuum circuit breaker of the lower gas compartment, provided on the back surface of the lower gas compartment, and attached with a current transformer for an instrument,
A first cable connected to the upper cable bushing and routed along one side of the casing outside the gas compartment; and
A second cable connected to the lower cable bushing and routed along the other side outside the gas compartment in the housing
With
Together with the openings provided in the mounting position of the upper cable bushing of the upper gas compartment, attaching the frame to secure the current transformer for the said upper cable bushing instrument into the opening, sealing the opening in said frame,
Wherein an opening is provided in the mounting position of the lower cable bushing of the lower gas compartment, attaching the frame to fix the current transformer for the said lower cable bushing instrument into the opening, and adapted to seal said opening in said frame Gas insulated switchgear.

The gas insulated switchgear according to claim 2 , wherein the frame is recessed toward the gas compartment.