JP2006033931A - Gas insulated switchgear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas insulated switchgear which can reduce the number of parts of the entire gas insulated switchgear by fixing an arrestor separator to a voltage impression port. <P>SOLUTION: The connection 2b of a sealed container 2 is provided, for voltage application test, with a tubular insulator 8, and this tubular insulator 8 keeps the airtightness of the connection 2b of the sealed container 2. This switchgear is provided with a current collector 18 which performs the electric connection with a cable head for voltage application test, inside the tubular insulator 8. Moreover, a fixing part 9 for the arrestor separator 4 is mechanically fixed and supported at the inner end of the sealed container 2 in the tubular insulator 8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、絶縁性ガスを封入した密閉容器内に構成した中性点用避雷器を有するガス絶縁開閉装置に関する。   The present invention relates to a gas-insulated switchgear having a neutral point surge arrester configured in a sealed container filled with an insulating gas.

従来のガス絶縁開閉装置は、そのライン側に中性点用避雷器を有する場合、変圧器などの電気機器に避雷器切り離し装置を介して中性点用避雷器を接続し、これら機器はそれぞれ専用の密閉容器内に収納して構成し、それぞれ絶縁スペーサなどを用いてガス的な区画を形成して構成するのが一般的であった。例えば、図４に示すように変圧器などの他の電気機器のライン側に中性点用避雷器を有する場合、変圧器側の密閉容器２２をウォールブッシング６によって気密に封じ、このウォールブッシング６の中心導体に集電子７を取り付けた接続用密閉容器２３を絶縁スペーサ２４によって気密に封じ、絶縁スペーサ２４の中心導体に避雷器切り離し装置４の固定部９を機械的および電気的に接続して避雷器切り離し密閉容器２５を絶縁スペーサ２６で気密に封じ、さらに、中性点用避雷器を収納した避雷器用密閉容器２７を接続していた。   When a conventional gas insulated switchgear has a neutral point lightning arrester on the line side, the neutral point lightning arrester is connected to an electrical device such as a transformer via a lightning arrester disconnection device, and each of these devices has its own sealed In general, it is configured to be housed in a container, and each is configured by forming a gas compartment using an insulating spacer or the like. For example, when a neutral point lightning arrester is provided on the line side of another electrical device such as a transformer as shown in FIG. 4, the hermetically sealed container 22 on the transformer side is hermetically sealed by the wall bushing 6. The connection sealed container 23 having the current collector 7 attached to the center conductor is hermetically sealed by the insulating spacer 24, and the lightning arrester disconnecting device 4 is mechanically and electrically connected to the center conductor of the insulating spacer 24 to separate the lightning arrester. The hermetic container 25 is hermetically sealed with an insulating spacer 26, and further, a lightning arrester hermetic container 27 containing a neutral point arrester is connected.

このようなガス絶縁開閉装置の現地電圧印加試験は、例えば切り離し部用密閉容器２５の他側に形成した接続部２５ａにブッシング２８を取り付け、その中心導体２９を固定部９に集電子２９を介して接続し、ブッシング２８の中心導体２９に電圧を印加して行っている。この現地電圧印加試験は、避雷器切り離し装置４の接続導体３０を上部を駆動して避雷器切り離し装置４を開いて中性点用避雷器を主回路導体から切り離した状態で行っている（例えば、特許文献１参照）。   In the field voltage application test of such a gas-insulated switchgear, for example, a bushing 28 is attached to a connection part 25a formed on the other side of the separation container 25, and the central conductor 29 is connected to the fixed part 9 via a current collector 29. The voltage is applied to the central conductor 29 of the bushing 28. This on-site voltage application test is performed in a state where the connection conductor 30 of the lightning arrester disconnecting device 4 is driven upward to open the lightning arrester disconnecting device 4 and the neutral point lightning arrester is disconnected from the main circuit conductor (for example, Patent Documents). 1).

特開平９−３２２３４０号公報Japanese Patent Laid-Open No. 9-322340

しかしながら、従来のガス絶縁開閉装置は、避雷器切り離し装置４を収納した密閉容器２５にブッシング２８の接続部２５ａとなる口出し部を形成し、通常この口出し部を封じた蓋を取り外した後にブッシング２８を取り付けているため、この口出し部を有する密閉容器２５は、電圧印加試験後に一度、充填した絶縁性ガスを回収し、ブッシング２８を取り外して蓋を取り付け、真空引きを行ってから再度絶縁性ガスを充填しなければならなかった。また、避雷器切り離し装置４の固定部９の支持のために使用している絶縁スペーサ２４を省略することはできず、構成が複雑化していた。   However, in the conventional gas insulated switchgear, a lead-out part that becomes the connection part 25a of the bushing 28 is formed in the sealed container 25 in which the lightning arrester disconnecting device 4 is housed. Since the airtight container 25 having the opening portion is attached, the filled insulating gas is collected once after the voltage application test, the bushing 28 is removed, the lid is attached, the vacuum is evacuated, and then the insulating gas is supplied again. Had to be filled. Further, the insulating spacer 24 used for supporting the fixing portion 9 of the lightning arrester disconnecting device 4 cannot be omitted, and the configuration is complicated.

本発明の目的は、部品数を削減することができると共に現地電圧印加試験を簡単に行うことができるようにしたガス絶縁開閉装置を提供することにある。   An object of the present invention is to provide a gas-insulated switchgear that can reduce the number of components and can easily perform a field voltage application test.

本発明は上記目的を達成するために、密閉容器内に主回路導体および中性点用避雷器を絶縁保持し、この主回路導体に避雷器切り離し装置の固定部を接続し、この固定部に設けた集電子との電気的接続状態を保持しながら動作する避雷器切り離し装置の接続導体によって上記主回路導体と上記中性点用避雷器間を切り離し可能に接続したガス絶縁開閉装置において、上記避雷器切り離し装置および上記中性点用避雷器を共通の密閉容器内に収納し、この共通の密閉容器の一つの接続部を気密に封じると共に内部を上記共通の密閉容器内とガス的に区分した筒状絶縁物を設け、この筒状絶縁物に設けた中心導体に上記避雷器切り離し装置の上記固定部を機械的に支持固定すると共に電気的に接続し、上記中心導体における筒状絶縁物の内部側に位置する端部に電圧印加用の絶縁導入手段と接続可能な集電子を設けたことを特徴とする。   In order to achieve the above-mentioned object, the present invention insulates and holds a main circuit conductor and a neutral point lightning arrester in a hermetically sealed container, and connects the main circuit conductor to a fixing part of a lightning arrester disconnecting device, and is provided in this fixing part. A gas-insulated switchgear in which the main circuit conductor and the neutral point arrester are detachably connected by a connection conductor of a lightning arrester disconnecting device that operates while maintaining an electrical connection state with a current collector. The neutral point lightning arrester is housed in a common sealed container, and one connecting portion of the common sealed container is hermetically sealed, and a cylindrical insulator in which the inside is gasified from the common sealed container And mechanically supporting and fixing the fixing portion of the lightning arrester disconnecting device to the central conductor provided in the cylindrical insulator, and electrically connecting to the inner side of the cylindrical insulator in the central conductor. Characterized in that a current collector which can be connected to the insulating introducing means for voltage application to the end that location.

また請求項２に記載の本発明は、請求項１記載のものにおいて、上記主回路導体に接続された遮断器および断路器側の導体を保持する他の筒状絶縁物を設け、この他の筒状絶縁物によって支持された上記主回路導体に他の集電子を取り付け、上記避雷器切り離し装置の上記固定部の導体を上記他の集電子内に挿入して電気的に接続し、上記他の集電子のばね力で上記固定部を支持したことを特徴とする。   According to a second aspect of the present invention, in the first aspect of the present invention, the circuit breaker connected to the main circuit conductor and another cylindrical insulator for holding the conductor on the disconnector side are provided. The other current collector is attached to the main circuit conductor supported by the cylindrical insulator, the conductor of the fixed part of the lightning arrester disconnecting device is inserted into the other current collector, and is electrically connected. The fixing portion is supported by the spring force of the current collector.

本発明によるガス絶縁開閉装置は、中性点用避雷器を収納した密閉容器を筒状絶縁物によって気密に封じているため、現地電圧印加試験のために筒状絶縁物の内部側に位置した集電子を用いて電圧印加試験のために取り付けるブッシングなどの絶縁導入手段を接続することができ、電圧印加試験後も中性点用避雷器を収納した密閉容器内の絶縁性ガスを回収したり、真空引きを行ってから再度絶縁性ガスを充填する必要はなくなり、現地電圧印加試験を簡単に行うことができ、また、このために設けた筒状絶縁物によって避雷器切り離し装置の固定部を支持しているため、従来の絶縁スペーサを省略して部品数を削減することができる。   In the gas insulated switchgear according to the present invention, the airtight container containing the neutral point arrester is hermetically sealed by the cylindrical insulator, so that the collector is located on the inner side of the cylindrical insulator for the field voltage application test. Insulation introduction means such as bushings attached for voltage application tests can be connected using electrons, and after the voltage application test, the insulating gas in the sealed container containing the neutral point arrester can be collected or vacuumed. It is no longer necessary to refill the insulating gas after pulling, and the on-site voltage application test can be easily performed, and the fixed part of the lightning arrester disconnecting device is supported by the cylindrical insulator provided for this purpose. Therefore, the number of parts can be reduced by omitting the conventional insulating spacer.

また請求項２に記載の本発明によるガス絶縁開閉装置は、避雷器切り離し装置の固定部を支持するために電気的な接続を行う他の集電子のばね力を利用することによって、一層、同固定部を確実に保持することができるようになる。   The gas insulated switchgear according to the second aspect of the present invention is further fixed by using the spring force of another current collector for electrical connection to support the fixing part of the lightning arrester disconnecting device. The part can be securely held.

以下，本発明の実施の形態を図面に基づいて説明する。
図１は、本発明の一実施の形態によるガス絶縁開閉装置を示す要部断面図である。
中性点用避雷器１を収納した密閉容器２をほぼ十字状に構成し、水平部左方は図示を省略した変圧器などの他の電気機器側との接続部２ａとし、水平部右方は後述する電圧印加用ケーブル３の接続部２ｂとし、垂直部上方は避雷器切り離し装置４の機構部５の接続部２ｃとしており、また、垂直部下方は中性点用避雷器１の収納部２ｄとしている。他の電気機器側に接続したウォールブッシングなどの筒状絶縁物６内には主回路導体が支持され、この主回路導体の端部に集電子７が取り付けられている。接続部２ｂのフランジ部には筒状絶縁物８が耐気密接続されており、この筒状絶縁物８の自由端部に避雷器切り離し装置４の固定部９が支持固定されている。この避雷器切り離し装置４の固定部９は、上述した集電子７内に導体１０を挿入して電気的な接続を行うと共に、集電子７例えばチューリップ形接触子の接触圧を与えるばね力によって導体１０を介して固定部９を保持している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of an essential part showing a gas insulated switchgear according to an embodiment of the present invention.
The airtight container 2 containing the neutral point lightning arrester 1 is configured in a substantially cross shape, and the left side of the horizontal part is a connection part 2a with other electrical equipment such as a transformer (not shown), and the right side of the horizontal part is The connecting portion 2b of the voltage application cable 3 described later is used, the upper portion of the vertical portion is the connecting portion 2c of the mechanism portion 5 of the lightning arrester disconnecting device 4, and the lower portion of the vertical portion is the housing portion 2d of the neutral point lightning arrester 1. . A main circuit conductor is supported in a cylindrical insulator 6 such as a wall bushing connected to another electric device side, and a current collector 7 is attached to an end of the main circuit conductor. A cylindrical insulator 8 is airtightly connected to the flange portion of the connecting portion 2b, and the fixing portion 9 of the lightning arrester separating device 4 is supported and fixed to the free end portion of the cylindrical insulator 8. The fixing portion 9 of the lightning arrester separating device 4 inserts the conductor 10 into the current collector 7 to make an electrical connection, and at the same time, the conductor 10 is applied by a spring force that applies the contact pressure of the current collector 7 such as a tulip contact. The fixing portion 9 is held via

避雷器切り離し装置４の固定部９における中性点用避雷器１側には集電子１１が取り付けられ、この集電子１１との電気的な接触状態を保持しながら上下動可能な接続導体１２が設けられている。この接続導体１２は、定常状態で中性点用避雷器１の上部に取り付けた集電子１３と接触状態にあるが、切り離し状態とするために避雷器切り離し装置４の機構部５によって駆動されるロッド１４に絶縁物１５を介して連結されている。機構部５は電気的にあるいは手動によって駆動され、ロッド１４を上下動することによって接続導体１２を集電子１３から切り離した状態と、接続導体１２を集電子１３に接続した接続状態とに切り替えることができる。   A current collector 11 is attached to the neutral point lightning arrester 1 side of the fixing portion 9 of the lightning arrester disconnecting device 4, and a connection conductor 12 that can move up and down while maintaining an electrical contact state with the current collector 11 is provided. ing. The connection conductor 12 is in contact with the current collector 13 attached to the upper part of the neutral point lightning arrester 1 in a steady state, but the rod 14 is driven by the mechanism unit 5 of the lightning arrester disconnecting device 4 in order to be in a disconnected state. Are connected to each other through an insulator 15. The mechanism unit 5 is electrically or manually driven to switch between a state in which the connection conductor 12 is disconnected from the current collector 13 and a connection state in which the connection conductor 12 is connected to the current collector 13 by moving the rod 14 up and down. Can do.

図２は、電圧印加用ケーブル３との接続部２ｂを拡大して示す断面図である。
筒状絶縁物８の右端は、密閉容器２の接続部２ｂに形成したフランジ１６に耐気密接続されている。筒状絶縁物８の左端部には中心導体１７が埋め込まれ、この中心導体１７の左端が避雷器切り離し装置４の固定部９にボルトなどによって固定されている。従って、避雷器切り離し装置４の固定部９は中心導体１７および筒状絶縁物８を介して密閉容器２に支持されている。中心導体１７の右端には集電子１８が取り付けられており、ケーブル３のケーブルヘッド１９に設けた導体２０が接触している。 FIG. 2 is an enlarged cross-sectional view showing the connection portion 2b with the voltage application cable 3. As shown in FIG.
The right end of the cylindrical insulator 8 is airtightly connected to a flange 16 formed in the connection portion 2 b of the sealed container 2. A center conductor 17 is embedded in the left end portion of the cylindrical insulator 8, and the left end of the center conductor 17 is fixed to the fixing portion 9 of the lightning arrester disconnecting device 4 with a bolt or the like. Therefore, the fixing portion 9 of the lightning arrester separating device 4 is supported by the hermetic container 2 via the center conductor 17 and the cylindrical insulator 8. A current collector 18 is attached to the right end of the center conductor 17, and a conductor 20 provided on the cable head 19 of the cable 3 is in contact with the current collector 18.

ここで、ケーブル３はガス絶縁開閉装置の現地耐電圧試験のために電圧印加部として取り付けられている。この耐電圧試験に先だって、中性点用避雷器１を主回路導体から切り離すが、これは機構部５を駆動してロッド１４を上方に移動し絶縁物１５を介して接続導体１２を集電子１３から切り離し、この切り離し状態を保持しながら、ケーブル３側から所定の電圧を印加して行う。   Here, the cable 3 is attached as a voltage application part for the field withstand voltage test of the gas insulated switchgear. Prior to this withstand voltage test, the neutral point lightning arrester 1 is disconnected from the main circuit conductor, but this drives the mechanism unit 5 to move the rod 14 upward and connect the connecting conductor 12 through the insulator 15 to collect the current 13. This is performed by applying a predetermined voltage from the cable 3 side while maintaining the disconnected state.

この耐電圧試験後は、図３に示すようにケーブルヘッド１９を筒状絶縁物８から引き抜いてケーブル３を取り外し、適当な絶縁物２９を嵌合した後、密閉容器２の接続部２ｂに形成したフランジ１６に蓋板２１を耐気密接続する。この蓋板２１と筒状絶縁物８とで形成される空間に絶縁性ガスや乾燥空気などを封入しても良い。   After this withstand voltage test, as shown in FIG. 3, the cable head 19 is pulled out from the cylindrical insulator 8, the cable 3 is removed, a suitable insulator 29 is fitted, and then formed on the connecting portion 2b of the sealed container 2. The lid plate 21 is connected to the flange 16 in an airtight manner. An insulating gas, dry air, or the like may be enclosed in a space formed by the lid plate 21 and the cylindrical insulator 8.

現地の組立では、他の電気機器側の重量物部分が付設面に支持され、その後、中性点用避雷器１を含む密閉容器２を接続することになる。ここで、他の電気機器側に設けた筒状絶縁物６に集電子７を支持し、筒状絶縁物６と避雷器切り離し装置４における固定部９とは機械的には分離しているため、既に他の電気機器側の重量物部分が付設面に支持されていても、この集電子７による接続を行いながら密閉容器２を付設面の所定の位置に容易に支持することができる。この組立後、密閉容器２内に乾燥空気を送り込んだ後、真空引きを行い、絶縁性ガスを充填する。中性点用避雷器１を含む密閉容器２内が一つのガス空間となっているため、この作業を簡単に行なうことができる。   In on-site assembly, the heavy parts on the other electrical equipment side are supported by the attached surface, and then the sealed container 2 including the neutral point arrester 1 is connected. Here, the current collector 7 is supported on the cylindrical insulator 6 provided on the other electric device side, and the cylindrical insulator 6 and the fixing portion 9 in the lightning arrester separating device 4 are mechanically separated. Even if the heavy object portion on the other electric device side is already supported on the attachment surface, the sealed container 2 can be easily supported at a predetermined position on the attachment surface while being connected by the current collector 7. After this assembly, dry air is fed into the sealed container 2 and then evacuated to fill with an insulating gas. Since the inside of the sealed container 2 including the neutral point lightning arrester 1 is a single gas space, this operation can be easily performed.

その後、図３の状態から蓋板２１および絶縁物２９を取り外して、図２に示すようにケーブル３およびケーブルヘッド１９をガス絶縁開閉装置の主回路導体に接続し、上述したように避雷器切り離し装置４を切り離し状態にするが、この避雷器切り離し装置４の切り離し操作は密閉容器２内の絶縁性ガスを回収したりすることなく行える。また、電圧印加試験のために密閉容器２の接続部２ｂに筒状絶縁物８を設けると共に、この筒状絶縁物８によって密閉容器２の接続部２ｂの気密を保持するようにしているため、ケーブルヘッド１９をガス絶縁開閉装置の主回路導体に接続して電圧印加試験を行う場合でも、密閉容器２内の絶縁性ガスを回収したりすることなく行える。   Thereafter, the cover plate 21 and the insulator 29 are removed from the state shown in FIG. 3, and the cable 3 and the cable head 19 are connected to the main circuit conductor of the gas insulated switchgear as shown in FIG. 4, the lightning arrester disconnecting device 4 can be disconnected without collecting the insulating gas in the sealed container 2. Moreover, since the cylindrical insulator 8 is provided in the connection portion 2b of the sealed container 2 for the voltage application test, and the airtightness of the connection portion 2b of the sealed container 2 is maintained by the cylindrical insulator 8, Even when the voltage application test is performed by connecting the cable head 19 to the main circuit conductor of the gas insulated switchgear, the insulation gas in the hermetic container 2 can be recovered without being collected.

さらに、このように電圧印加試験のために密閉容器２の接続部２ｂに設けた筒状絶縁物８の一端部で避雷器切り離し装置４の固定部９を機械的に支持固定し、この筒状絶縁物８を常設としているため、絶縁スペーサを省略しても避雷器切り離し装置４の固定部９を良好に支持することができる。この固定部９は集電子７内に挿入した導体１０によってさらに補強される。また接続導体１２と集電子１３も同様の構成であるから、集電子１３と、この集電子１３内に挿入した接続導体１２によって中性点用避雷器１の上端部を集電子１３のばね力を利用して補強支持することができる。   Further, the fixing portion 9 of the lightning arrester separating device 4 is mechanically supported and fixed at one end of the cylindrical insulator 8 provided at the connection portion 2b of the hermetic container 2 for the voltage application test. Since the object 8 is permanently installed, the fixing portion 9 of the lightning arrester separating device 4 can be favorably supported even if the insulating spacer is omitted. The fixing portion 9 is further reinforced by a conductor 10 inserted into the current collector 7. Further, since the connecting conductor 12 and the current collector 13 have the same configuration, the spring force of the current collector 13 is applied to the upper end of the neutral point arrester 1 by the current collector 13 and the connecting conductor 12 inserted into the current collector 13. It can be reinforced and supported.

上述した実施の形態では、ケーブル３によって電圧印加試験を行っているが、図４に示したようなブッシングを用い、このブッシングの中心導体を図２に示した集電子１８に接続し、ブッシングから試験電圧を印加しても良い。また密閉容器２に形成したほぼ水平な接続部２ｂに電圧印加試験用のケーブル３を接続したが、避雷器切り離し装置４の機構部５と、接続部２ｂの位置を入れ替えて構成したり、筒状絶縁物８を図１における固定部９の前後の位置に配置した接続部２ｂとしても良い。いずれにしても、電圧印加試験用のケーブル３やブッシングなどの電圧印加試験用絶縁導入手段と接続するために筒状絶縁物８を設け、この筒状絶縁物８を利用して避雷器切り離し装置４の固定部９を機械的に支持固定すれば良い。   In the above-described embodiment, a voltage application test is performed using the cable 3. A bushing as shown in FIG. 4 is used, and the central conductor of this bushing is connected to the current collector 18 shown in FIG. A test voltage may be applied. In addition, the voltage application test cable 3 is connected to the substantially horizontal connection portion 2b formed in the hermetic container 2. However, the mechanism portion 5 of the lightning arrester disconnecting device 4 and the position of the connection portion 2b are interchanged. It is good also as the connection part 2b which has arrange | positioned the insulator 8 in the position before and behind the fixing | fixed part 9 in FIG. In any case, a cylindrical insulator 8 is provided for connection with a voltage application test cable 3 and a voltage application test insulation introducing means such as a bushing, and the lightning arrester disconnecting device 4 is provided using this cylindrical insulator 8. The fixing portion 9 may be mechanically supported and fixed.

本発明のガス絶縁開閉装置は、上述した実施の形態に限らず他のガス絶縁開閉装置にも適用することができる。   The gas insulated switchgear of the present invention can be applied not only to the above-described embodiments but also to other gas insulated switchgears.

本発明の一実施の形態によるガス絶縁開閉装置の要部断面図である。It is principal part sectional drawing of the gas insulated switchgear by one embodiment of this invention. 図１に示したガス絶縁開閉装置の要部を拡大した断面図である。It is sectional drawing to which the principal part of the gas insulated switchgear shown in FIG. 1 was expanded. 図１に示したガス絶縁開閉装置の電圧印加試験後の要部を拡大した断面図である。It is sectional drawing to which the principal part after the voltage application test of the gas insulated switchgear shown in FIG. 1 was expanded. 従来のガス絶縁開閉装置の要部断面図である。It is principal part sectional drawing of the conventional gas insulated switchgear.

符号の説明Explanation of symbols

１ 中性点用避雷器
２ 密閉容器
２ａ，２ｂ，２ｃ，２ｄ 接続部
３ ケーブル
４ 避雷器切り離し装置
６ 筒状絶縁物
７ 集電子
８ 筒状絶縁物
９ 固定部
１２ 接続導体
１３ 集電子
１７ 中心導体
１８ 集電子
１９ ケーブルヘッド
２１ 蓋板
DESCRIPTION OF SYMBOLS 1 Lightning arrester for neutral points 2 Sealed container 2a, 2b, 2c, 2d Connection part 3 Cable 4 Lightning arrester disconnecting device 6 Cylindrical insulator 7 Current collector 8 Cylindrical insulator 9 Fixed part 12 Connection conductor 13 Current collector 17 Central conductor 18 Current collector 19 Cable head 21 Cover plate

Claims (2)

密閉容器内に主回路導体および中性点用避雷器を絶縁保持し、この主回路導体に避雷器切り離し装置の固定部を接続し、この固定部に設けた集電子との電気的接続状態を保持しながら動作する避雷器切り離し装置の接続導体によって上記主回路導体と上記中性点用避雷器間を切り離し可能に接続したガス絶縁開閉装置において、上記避雷器切り離し装置および上記中性点用避雷器を共通の密閉容器内に収納し、この共通の密閉容器の一つの接続部を気密に封じると共に内部を上記共通の密閉容器内とガス的に区分した筒状絶縁物を設け、この筒状絶縁物に設けた中心導体に上記避雷器切り離し装置の上記固定部を機械的に支持固定すると共に電気的に接続し、上記中心導体における筒状絶縁物の内部側に位置する端部に電圧印加用の絶縁導入手段と接続可能な集電子を設けたことを特徴とするガス絶縁開閉装置。   The main circuit conductor and neutral point lightning arrester are insulated and held in the sealed container, and the fixed part of the lightning arrester disconnecting device is connected to this main circuit conductor, and the electrical connection state with the current collector provided in this fixed part is maintained. A gas-insulated switchgear in which the main circuit conductor and the neutral point lightning arrester are detachably connected by a connection conductor of a lightning arrester separating device that operates while the lightning arrester disconnecting device and the neutral point lightning arrester are connected to a common sealed container A cylindrical insulator that is housed inside and hermetically seals one connection portion of the common sealed container and that is internally separated from the inside of the common sealed container is provided, and a center provided on the cylindrical insulator is provided. Insulation for voltage application is introduced into the end portion of the central conductor located inside the cylindrical insulator, while mechanically supporting and fixing the fixing portion of the lightning arrester disconnecting device to the conductor and electrically connecting it. Gas-insulated switchgear apparatus characterized in that a current collector connectable to stage. 請求項１記載のものにおいて、上記主回路導体に接続された遮断器および断路器側の導体を保持する他の筒状絶縁物を設け、この他の筒状絶縁物によって支持された上記主回路導体に他の集電子を取り付け、上記避雷器切り離し装置の上記固定部の導体を上記他の集電子内に挿入して電気的に接続し、上記他の集電子のばね力で上記固定部を支持したことを特徴とするガス絶縁開閉装置。
2. The main circuit according to claim 1, further comprising a circuit breaker connected to the main circuit conductor and another cylindrical insulator for holding the disconnector side conductor, and supported by the other cylindrical insulator. Attach another current collector to the conductor, insert the conductor of the fixed part of the lightning arrester disconnecting device into the other current collector and connect it electrically, and support the fixed part with the spring force of the other current collector A gas insulated switchgear characterized by that.

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