JP2002152927A - Compound insulation type gas-insulated - Google Patents
Compound insulation type gas-insulatedInfo
- Publication number
- JP2002152927A JP2002152927A JP2000343032A JP2000343032A JP2002152927A JP 2002152927 A JP2002152927 A JP 2002152927A JP 2000343032 A JP2000343032 A JP 2000343032A JP 2000343032 A JP2000343032 A JP 2000343032A JP 2002152927 A JP2002152927 A JP 2002152927A
- Authority
- JP
- Japan
- Prior art keywords
- insulator
- gas
- metal container
- voltage conductor
- insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/066—Devices for maintaining distance between conductor and enclosure
Landscapes
- Installation Of Bus-Bars (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電力機器に使用さ
れるガス絶縁開閉装置に係り、複数種の絶縁媒体を用い
ることによって、耐電圧値を向上させた複合絶縁方式ガ
ス絶縁開閉装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear used in electric power equipment, and more particularly to a composite insulated switchgear having an improved withstand voltage by using a plurality of types of insulating media. It is.
【０００２】[0002]
【従来の技術】現在、電力系統においては、絶縁性ガス
封入した金属容器内に、充電部を収容したガス絶縁開閉
装置が広く用いられている。このガス絶縁開閉装置は、
充電部が密封構造の金属容器内に収容されていることか
ら、相間及び対地間の絶縁距離を縮小できるので、小形
化が容易である。また、外部の影響を受けにくいことか
ら安全性及び信頼性に優れている。従って、その適用範
囲が広がり、今や変電所および発電所に用いられる開閉
装置の主流をなしている。2. Description of the Related Art At present, in a power system, a gas insulated switchgear accommodating a charged part in a metal container filled with an insulating gas is widely used. This gas insulated switchgear
Since the charging unit is housed in the metal container having the sealed structure, the insulation distance between the phases and the ground can be reduced, so that the miniaturization is easy. In addition, they are excellent in safety and reliability because they are not easily affected by outside. Therefore, its application range has expanded, and it is now the mainstream of switchgear used in substations and power plants.
【０００３】このようなガス絶縁開閉装置の内部構造の
一例を、図６を参照して説明する。すなわち、金属容器
２内に、通電用の高電圧導体１が支持絶縁物３によって
絶縁支持されている。この金属容器２に封入される絶縁
ガスとしては、絶縁性能および冷却性能に優れたＳＦ６
ガス（六フッ化硫黄ガス）４０が広く適用されている。An example of the internal structure of such a gas insulated switchgear will be described with reference to FIG. That is, in the metal container 2, the energized high-voltage conductor 1 is insulated and supported by the supporting insulator 3. The insulating gas sealed in the metal container 2 includes SF6 having excellent insulating performance and cooling performance.
Gas (sulfur hexafluoride gas) 40 is widely applied.
【０００４】ところで、ガス絶縁開閉装置は、１１００
ｋＶ級系統への適用も計画され、より一層の高電圧化と
大容量化が進んでいる。これらの大型のガス絶縁開閉装
置を用いた変電所は、社会の電気エネルギーの根幹をな
すことから、非常に高い信頼性が要求されるとともに、
都市部の地下変電所への適用や経済性の観点から、さら
なる縮小化が望まれている。そこで、これらの要求を満
たすため、従来のガス絶縁開閉装置の絶縁構成よりも信
頼性が高く、高ストレスでの使用に耐えうる新規の絶縁
構成が求められている。Incidentally, the gas insulated switchgear is 1100
Application to a kV class system is also planned, and higher voltage and higher capacity are being promoted. Substations using these large gas-insulated switchgears are required to have extremely high reliability because they form the basis of social electric energy.
Further reduction is desired from the viewpoint of application to underground substations in urban areas and economic efficiency. Therefore, in order to satisfy these demands, a new insulating configuration which has higher reliability than the insulating configuration of the conventional gas insulated switchgear and can withstand use under high stress is required.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記の
ような従来のガス絶縁開閉装置を高電圧化すると、高電
圧導体１の電界強度が上昇することになるので、同等の
絶縁性能を維持するためには、機器を大型化して絶縁距
離を確保する手段をとるか、封入するガスの圧力を上昇
させて絶縁性能を向上させる手段をとらなくてはならな
い。ここで、ガス圧力を上昇させる方法は、金属容器２
の圧力容器としての構造、材質を見直す必要があるた
め、現行の製造ラインでは困難が多い。従って、機器を
大型化して絶縁距離を確保する方法をとる必要があり、
設置面積の拡大につながる。However, when the voltage of the conventional gas insulated switchgear as described above is increased, the electric field strength of the high-voltage conductor 1 increases, so that the same insulation performance is maintained. In order to achieve this, it is necessary to take measures to increase the size of the equipment and secure the insulation distance, or to increase the pressure of the gas to be sealed to improve the insulation performance. Here, the method of increasing the gas pressure is as follows.
Because it is necessary to review the structure and material of the pressure vessel, there are many difficulties with the current production line. Therefore, it is necessary to take a method to secure the insulation distance by increasing the size of the equipment,
This leads to an increase in installation area.
【０００６】また、従来のガス絶縁開閉装置は、絶縁性
能が非常に優れたガスを加圧充填することにより、気中
絶縁開閉装置と比べて大幅な縮小化が可能になった反
面、金属容器２内に、例えば数ｍｍ程度の金属異物が存
在するだけで、高電圧導体１と金属容器２との間の絶縁
性能が著しく低下することが知られている。この金属異
物は、運転電圧の下で高電圧導体１と金属容器２との間
を往復運動するが、このような状況下で、金属異物が高
電圧導体１に達すると、高電圧導体１と金属容器２との
間の絶縁空間で絶縁破壊が発生する可能性が高くなる。Further, the conventional gas insulated switchgear can be significantly reduced in size by being filled with a gas having an extremely excellent insulating performance under pressure, as compared with the air insulated switchgear. It is known that the insulation performance between the high-voltage conductor 1 and the metal container 2 is significantly reduced only by the presence of a metal foreign matter of, for example, about several mm in the metal container 2. The metal foreign matter reciprocates between the high-voltage conductor 1 and the metal container 2 under the operating voltage. Under such circumstances, when the metal foreign matter reaches the high-voltage conductor 1, the high-voltage conductor 1 The possibility of dielectric breakdown occurring in the insulating space between the metal container 2 is increased.
【０００７】この金属異物による問題に対処するため、
特許第３０２８９７５号公報において、高電圧導体１ま
たは金属容器２に絶縁被覆６，７を施す技術が提案され
ている。このような絶縁ガスと絶縁被覆による複合絶縁
方式では、例えば、平成１１年電気学会全国大会Ｎｏ．
１５４２「ガス中許容電界を基準とした窒素ガス絶縁Ｇ
ＩＳ断面寸法の考察」に示されているように、絶縁耐力
はＳＦ６ガスのみを用いた場合よりも低下するが、地球
環境に優しい窒素を絶縁ガスとした場合であっても、現
行ＳＦ６ガス絶縁機器と同等のサイズで絶縁構成が可能
となることが示されている。また、高電圧導体１と金属
容器２との間に、筒状のバリア絶縁物５を挿入すること
によって、金属異物の影響を防ぐ方法も考えられてい
る。上記の両方式によれば、放電伸展の抑制、金属異物
の抑制が可能となり、被覆絶縁物やバリア絶縁物の絶縁
耐力が高いため、両絶縁物を貫通しての全路絶縁破壊に
至ることはない。In order to cope with the problem caused by the metallic foreign matter,
Japanese Patent No. 3028975 proposes a technique in which insulating coatings 6 and 7 are applied to the high-voltage conductor 1 or the metal container 2. In such a composite insulating system using an insulating gas and an insulating coating, for example, the 1999 IEEJ National Convention No.
1542 "Nitrogen gas insulation G based on allowable electric field in gas
As shown in “Consideration of IS Cross-sectional Dimensions”, the dielectric strength is lower than when only SF6 gas is used. However, even if the environment-friendly nitrogen is used as the insulating gas, the current SF6 gas insulation is used. It is shown that an insulation configuration is possible with the same size as the device. Further, a method has been considered in which a cylindrical barrier insulator 5 is inserted between the high-voltage conductor 1 and the metal container 2 to prevent the influence of metal foreign matter. According to both of the above methods, it is possible to suppress discharge extension and metal foreign substances, and the insulation strength of the covering insulator and the barrier insulator is high. There is no.
【０００８】ところが、絶縁物の切れ目となる高電圧導
体の継ぎ目部（接続部）に弱点が移行し、絶縁被覆また
は絶縁物表面の沿面放電が、これら弱点部まで伸展して
全路絶縁破壊に至る可能性が考えられる。例えば、支持
絶縁物や絶縁被覆、バリア絶縁物上に金属異物が付着し
た場合には、サージ電圧によって金属異物の放電が生じ
ると、伸展した放電路が、高電圧導体の金属部が露出す
る絶縁被覆の切れ目に達し、放電路は高電圧導体と同電
位となる。この状態では、放電路は接地電位の金属容器
へ向かって伸展し全路絶縁破壊に至る可能性がある。However, the weak point shifts to the joint (connection) of the high-voltage conductor, which is a break in the insulator, and the creeping discharge on the insulating coating or the insulator surface extends to the weak point, causing a breakdown on the entire circuit. It is possible. For example, when metal foreign matter adheres to a supporting insulating material, insulating coating, or barrier insulating material, when a discharge of the metal foreign material occurs due to a surge voltage, the extended discharge path causes the metal part of the high-voltage conductor to be exposed. A break in the coating is reached and the discharge path is at the same potential as the high voltage conductor. In this state, the discharge path may extend toward the metal container at the ground potential, leading to all-path dielectric breakdown.
【０００９】本発明は上記のような従来技術の問題点を
解決するために提案されたものであり、その目的は、大
型化させることなく、高電圧導体及び金属容器間の絶縁
物の沿面距離を大きく取ることにより絶縁破壊を防止で
き、金属異物が付着しても絶縁性能が低下することがな
く、小形で信頼性の高い複合絶縁方式ガス絶縁開閉装置
を提供することにある。The present invention has been proposed to solve the above-mentioned problems of the prior art, and has as its object to increase the creepage distance of an insulator between a high-voltage conductor and a metal container without increasing the size. It is an object of the present invention to provide a small and highly reliable composite insulation type gas insulated switchgear which can prevent the dielectric breakdown by taking a large value, and the insulation performance does not decrease even if metal foreign matter adheres.
【００１０】[0010]
【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、請求項１記載の発明は、絶縁ガスが封入された金
属容器内に、通電用の高電圧導体が挿通され、支持絶縁
物によって絶縁支持された複合絶縁方式ガス絶縁開閉装
置において、前記高電圧導体は接続部を介して複数接続
され、前記高電圧導体の外表面には絶縁被覆が施され、
前記高電圧導体の接続部に対応する前記絶縁被覆の切れ
目から、前記高電圧導体と前記支持絶縁物との接触部ま
での沿面距離が、前記高電圧導体と前記金属容器との間
のガス空間の距離よりも大きいことを特徴とする。以上
のような請求項１記載の発明では、高電圧導体における
絶縁被覆の切れ目から支持絶縁物の沿面を介して金属容
器に至る沿面距離が、高電圧導体と金属容器との間のガ
ス空間の距離であるガスギャップの２倍以上となる。従
って、沿面距離を十分に確保して、沿面放電に対しても
ガス中の放電と同等以上とすることができるので、絶縁
被覆の切れ目の弱点が顕著化することなく、絶縁信頼性
を向上させることができる。さらに、絶縁性能が向上す
るので、絶縁ガスとしてＳＦ６ガス以外のものを用いて
も、従来のガス絶縁開閉装置と同等以上の絶縁性能が確
保できる。このため、高価なＳＦ６ガスの使用量を低減
でき、経済性や環境調和に優れている。In order to achieve the above-mentioned object, according to the first aspect of the present invention, an energizing high-voltage conductor is inserted into a metal container filled with an insulating gas, and a supporting insulator is provided. In the composite insulation type gas insulated switchgear insulated and supported by, a plurality of the high-voltage conductors are connected via a connection portion, and an outer surface of the high-voltage conductor is provided with an insulating coating,
The creepage distance from the cut of the insulating coating corresponding to the connection portion of the high-voltage conductor to the contact portion between the high-voltage conductor and the supporting insulator is a gas space between the high-voltage conductor and the metal container. The distance is greater than the distance. According to the first aspect of the present invention, the creepage distance from the cut of the insulating coating in the high-voltage conductor to the metal container via the creepage of the supporting insulator is equal to the gas space between the high-voltage conductor and the metal container. It is more than twice the gas gap which is the distance. Therefore, the creepage distance can be sufficiently ensured, and the creepage discharge can be made equal to or more than the discharge in the gas, so that the weak point of the cut in the insulating coating does not become noticeable and the insulation reliability is improved. be able to. Furthermore, since the insulation performance is improved, even if a gas other than SF6 gas is used as the insulation gas, insulation performance equal to or higher than that of the conventional gas insulated switchgear can be secured. For this reason, the amount of expensive SF6 gas used can be reduced, which is excellent in economy and environmental harmony.
【００１１】請求項２記載の発明は、請求項１記載の複
合絶縁方式ガス絶縁開閉装置において、前記金属容器は
接続部を介して複数接続され、前記金属容器の内表面に
は絶縁被覆が施され、前記金属容器の接続部に対応する
前記絶縁被覆の切れ目から、前記高電圧導体と前記支持
絶縁物との接触部までの沿面距離が、前記高電圧導体と
前記金属容器との間のガス空間の距離よりも大きいこと
を特徴とする。以上のような請求項２記載の発明では、
沿面距離は、高電圧導体における絶縁被覆の切れ目から
支持絶縁物までの距離と、支持絶縁物の沿面距離と、金
属容器における絶縁被覆の切れ目から支持絶縁物までの
距離との和となるので、ガスギャップの３倍以上とする
ことができ、絶縁信頼性がより一層向上する。According to a second aspect of the present invention, in the composite insulated gas-insulated switchgear according to the first aspect, a plurality of the metal containers are connected via a connection portion, and an insulating coating is applied to an inner surface of the metal container. The creepage distance from the cut of the insulating coating corresponding to the connection portion of the metal container to the contact portion between the high-voltage conductor and the supporting insulator is a gas between the high-voltage conductor and the metal container. It is characterized by being larger than the distance of the space. According to the second aspect of the present invention,
Since the creepage distance is the sum of the distance from the break in the insulating coating in the high-voltage conductor to the support insulator, the creepage distance in the support insulator, and the distance from the cut in the insulating coating in the metal container to the support insulator, The gas gap can be set to three times or more, and the insulation reliability is further improved.
【００１２】請求項３記載の発明は、絶縁ガスが封入さ
れた金属容器内に、通電用の高電圧導体が挿通され、前
記高電圧導体と前記金属容器との間にバリア絶縁物が挿
入され、前記高電圧導体と前記バリア絶縁物との間が第
１の支持絶縁物によって絶縁支持され、前記バリア絶縁
物と前記金属容器との間が第２の支持絶縁物によって絶
縁支持された複合絶縁方式ガス絶縁開閉装置において、
前記バリア絶縁物は接続部を介して複数接続され、前記
バリア絶縁物の接続部から、前記高電圧導体と前記第１
の支持絶縁物との接触部までの沿面距離が、前記高電圧
導体と前記バリア絶縁物との間のガス空間の距離よりも
大きいことを特徴とする。以上のような請求項３記載の
発明では、バリア絶縁物の接続部からバリア絶縁物表
面、第１の支持絶縁物の沿面を介して、高電圧導体に至
る沿面距離が、高電圧導体とバリア絶縁物との間のガス
空間の距離であるガスギャップの距離の２倍以上とな
る。従って、沿面距離を十分に確保して、沿面放電に対
してもガス中の放電と同等以上とすることができるの
で、バリア絶縁物の接続部の弱点が顕著化することな
く、絶縁信頼性を向上させることができる。According to a third aspect of the present invention, an energizing high-voltage conductor is inserted into a metal container filled with an insulating gas, and a barrier insulator is inserted between the high-voltage conductor and the metal container. A composite insulation in which a portion between the high-voltage conductor and the barrier insulator is insulated and supported by a first support insulator, and a portion between the barrier insulator and the metal container is insulated and supported by a second support insulator; Type gas insulated switchgear,
A plurality of the barrier insulators are connected via a connection portion, and the high-voltage conductor and the first
A creepage distance to a contact portion with the supporting insulator is larger than a distance of a gas space between the high-voltage conductor and the barrier insulator. According to the third aspect of the present invention, the creepage distance from the connection portion of the barrier insulator to the high-voltage conductor via the barrier insulator surface and the creepage surface of the first supporting insulator is different from the high-voltage conductor and the barrier. It is at least twice the distance of the gas gap, which is the distance of the gas space between the insulator and the insulator. Therefore, the creepage distance can be sufficiently secured, and the creepage discharge can be made equal to or more than the discharge in the gas, so that the weakness of the connection portion of the barrier insulator does not become noticeable and the insulation reliability is improved. Can be improved.
【００１３】請求項４記載の発明は、請求項３記載の複
合絶縁方式ガス絶縁開閉装置において、前記バリア絶縁
物の接続部から前記第２の支持絶縁物との接続部までの
沿面距離が、前記バリア絶縁物と前記金属容器との間の
ガス空間の距離よりも大きいことを特徴とする。以上の
ような請求項４記載の発明では、バリア絶縁物の接続部
からバリア絶縁物表面、支持絶縁物の沿面を介して、金
属容器に至る沿面距離が、金属容器とバリア絶縁物との
間のガス空間の距離であるガスギャップの距離の２倍以
上となる。従って、沿面距離を十分に確保して、沿面放
電に対してもガス中の放電と同等以上とすることができ
るので、バリア絶縁物の接続部の弱点が顕著化すること
なく、絶縁信頼性を向上させることができる。According to a fourth aspect of the present invention, in the composite insulated gas insulated switchgear according to the third aspect, a creepage distance from a connection portion of the barrier insulator to a connection portion with the second support insulator is: It is characterized in that it is larger than the distance of the gas space between the barrier insulator and the metal container. According to the fourth aspect of the present invention, the creepage distance from the connection portion of the barrier insulator to the metal container via the surface of the barrier insulator and the creepage of the support insulator is smaller than the distance between the metal container and the barrier insulator. Is more than twice the distance of the gas gap, which is the distance of the gas space. Therefore, the creepage distance can be sufficiently secured, and the creepage discharge can be made equal to or more than the discharge in the gas, so that the weakness of the connection portion of the barrier insulator does not become noticeable and the insulation reliability is improved. Can be improved.
【００１４】請求項５記載の発明は、絶縁ガスが封入さ
れた金属容器内に、通電用の高電圧導体が挿通され、前
記高電圧導体と前記金属容器との間にバリア絶縁物が挿
入され、前記高電圧導体と前記バリア絶縁物との間が第
１の支持絶縁物によって絶縁支持され、前記バリア絶縁
物と前記金属容器との間が第２の支持絶縁物によって絶
縁支持された複合絶縁方式ガス絶縁開閉装置において、
前記第１の支持絶縁物と前記第２の支持絶縁物とは、円
周方向に互いに異なる位置に配置されていることを特徴
とする。以上のような請求項５記載の発明では、第１及
び第２の支持絶縁物の取付位置がバリア絶縁物の内外で
異なるため、高電圧導体からバリア絶縁物内及びバリア
絶縁物外の支持絶縁物を介して金属容器に至る沿面距離
が、放電路に対して長くなり、絶縁信頼性を向上させる
ことができる。According to a fifth aspect of the present invention, an energizing high-voltage conductor is inserted into a metal container filled with an insulating gas, and a barrier insulator is inserted between the high-voltage conductor and the metal container. A composite insulation in which a portion between the high-voltage conductor and the barrier insulator is insulated and supported by a first support insulator, and a portion between the barrier insulator and the metal container is insulated and supported by a second support insulator; Type gas insulated switchgear,
The first support insulator and the second support insulator are arranged at positions different from each other in a circumferential direction. In the fifth aspect of the present invention, since the mounting positions of the first and second support insulators are different inside and outside the barrier insulator, the support insulation from the high-voltage conductor inside the barrier insulator and outside the barrier insulator is provided. The creepage distance from the object to the metal container becomes longer than the discharge path, and the insulation reliability can be improved.
【００１５】請求項６記載の発明は、絶縁ガスが封入さ
れた金属容器内に、通電用の高電圧導体が挿通され、支
持絶縁物によって絶縁支持されたガス絶縁開閉装置にお
いて、前記高電圧導体は接続部を介して複数接続され、
前記高電圧導体の外表面及び前記金属容器の内表面の少
なくとも一方には、絶縁被覆が施され、前記絶縁被覆
は、ひだを有していることを特徴とする。以上のような
請求項６記載の発明では、絶縁被覆がひだ付き形状であ
るため、絶縁被覆表面を伸展する放電路に対して、沿面
距離が長くなり、絶縁信頼性を向上できる。According to a sixth aspect of the present invention, in the gas insulated switchgear in which a high-voltage conductor for energization is inserted into a metal container filled with an insulating gas and is insulated and supported by a supporting insulator, Are connected to each other through the connection section,
At least one of the outer surface of the high-voltage conductor and the inner surface of the metal container is provided with an insulating coating, and the insulating coating has a fold. In the invention according to claim 6 described above, since the insulating coating has a pleated shape, the creepage distance becomes longer with respect to the discharge path extending on the surface of the insulating coating, and insulation reliability can be improved.
【００１６】請求項７記載の発明は、絶縁ガスが封入さ
れた金属容器内に、通電用の高電圧導体が挿通され、前
記高電圧導体と前記金属容器との間にバリア絶縁物が挿
入され、前記高電圧導体と前記バリア絶縁物との間が第
１の支持絶縁物によって絶縁支持され、前記バリア絶縁
物と前記金属容器との間が第２の支持絶縁物によって絶
縁支持された複合絶縁方式ガス絶縁開閉装置において、
前記バリア絶縁物は、ひだを有していることを特徴とす
る。以上のような請求項７記載の発明では、バリア絶縁
物にひだを持たせることにより、バリア絶縁物表面を伸
展する放電路に対して沿面距離が長くなり、絶縁信頼性
を向上できる。According to a seventh aspect of the present invention, an energizing high-voltage conductor is inserted into a metal container filled with an insulating gas, and a barrier insulator is inserted between the high-voltage conductor and the metal container. A composite insulation in which a portion between the high-voltage conductor and the barrier insulator is insulated and supported by a first support insulator, and a portion between the barrier insulator and the metal container is insulated and supported by a second support insulator; Type gas insulated switchgear,
The barrier insulator has a fold. According to the seventh aspect of the present invention, by providing the barrier insulator with the folds, the creepage distance with respect to the discharge path extending on the barrier insulator surface is increased, and the insulation reliability can be improved.
【００１７】請求項８の発明では、請求項１〜７のいず
れか１項に記載の複合絶縁方式ガス絶縁開閉装置におい
て、前記支持絶縁物、前記第１の支持絶縁物及び前記第
２の支持絶縁物の少なくとも一つは、ひだを有している
ことを特徴とする。以上のような請求項８記載の発明で
は、支持絶縁物にひだを持たせることにより、支持絶縁
物の表面を伸展する放電路に対して沿面距離が長くな
り、絶縁信頼性を向上できる。According to an eighth aspect of the present invention, in the composite insulated gas insulated switchgear according to any one of the first to seventh aspects, the supporting insulator, the first supporting insulator, and the second supporting insulator are provided. At least one of the insulators has a fold. According to the eighth aspect of the present invention, by providing the supporting insulator with folds, the creepage distance becomes longer with respect to the discharge path extending on the surface of the supporting insulator, and the insulation reliability can be improved.
【００１８】[0018]
【発明の実施の形態】本発明の実施の形態を、図面を参
照して具体的に説明する。なお、図６に示した従来技術
と同一の部材に関しては、同一の符号を付して説明は省
略する。Embodiments of the present invention will be specifically described with reference to the drawings. Note that the same members as those in the related art shown in FIG. 6 are denoted by the same reference numerals, and description thereof will be omitted.
【００１９】（１）第１の実施の形態 ［構成］請求項１及び２記載の発明に対応する実施の形
態を、図１の構成図を参照して説明する。すなわち、高
電圧導体１の外表面及び金属容器２の内表面には、それ
ぞれ厚さ１ｍｍ以上の絶縁被覆６，７が施されている。
絶縁被覆６，７の材質としては、例えば、ＰＦＡ（ぺル
フロロアルコキシフッ化プラスチック）、ＦＥＰ（ポリ
フッ化エチレンプロピレン）、ＰＴＦＥ（ポリ４フッ化
エチレン）などのフッ素樹脂を用いることが考えられ
る。(1) First Embodiment [Configuration] An embodiment corresponding to the first and second aspects of the present invention will be described with reference to the configuration diagram of FIG. That is, the outer surfaces of the high-voltage conductor 1 and the inner surface of the metal container 2 are coated with insulating coatings 6 and 7 each having a thickness of 1 mm or more.
As a material of the insulating coatings 6 and 7, for example, it is conceivable to use a fluororesin such as PFA (perfluoroalkoxyfluoride plastic), FEP (polyethylene propylene), and PTFE (polytetrafluoroethylene).
【００２０】そして、複数の高電圧導体１の接離可能な
接続部に対応する絶縁被覆６の切れ目から、絶縁被覆６
を介して高電圧導体１を絶縁支持する支持絶縁物３との
接触部までの沿面距離をＬ１とし、複数の金属容器２の
接離可能な接続部に対応する絶縁被覆７の切れ目から、
絶縁被覆６を介して接する支持絶縁物３との接触部まで
の沿面距離をＬ２とし、高電圧導体１と金属容器２との
ガス空間の距離であるガスギャップをｇとすると、Ｌ１
＞ｇ、Ｌ２＞ｇとなるように設計されている。さらに、
絶縁ガス４０は、六フッ化硫黄ガス、窒素ガス、乾燥空
気及び炭酸ガスのうちの少なくとも１種を含む単体ガス
もしくは混合ガスによって構成されている。Then, from the cuts in the insulating coating 6 corresponding to the connection portions of the plurality of high-voltage conductors 1 which can be connected and separated, the insulating coating 6
C1 is a creepage distance to a contact portion with a supporting insulator 3 that insulates and supports the high-voltage conductor 1 through the insulating cover 7 corresponding to a connection portion of the plurality of metal containers 2 that can be connected and separated.
Assuming that a creepage distance to a contact portion with the supporting insulator 3 contacting via the insulating coating 6 is L2, and a gas gap which is a distance of a gas space between the high-voltage conductor 1 and the metal container 2 is g, L1
> G, L2> g. further,
The insulating gas 40 is composed of a single gas or a mixed gas containing at least one of sulfur hexafluoride gas, nitrogen gas, dry air and carbon dioxide gas.
【００２１】［作用効果］以上のような本実施の形態の
作用効果は以下の通りである。すなわち、支持絶縁物３
に金属異物８が付着した状態でサージ電圧が印加される
と、金属異物８で放電が生じるが、厚さのある絶縁被覆
６，７は絶縁耐力が高いため、貫通破壊して全路絶縁破
壊に至ることはない。そして、高電圧導体１及び金属容
器２におけるそれぞれの接続部は、絶縁被覆６，７の切
れ目となって裸部分が生じるが、高電圧導体１の絶縁被
覆６の沿面距離Ｌ１、金属容器２の絶縁被覆７の沿面距
離Ｌ２が、サージ電圧に伴う放電伸展速度に比べて十分
に長いため、全路破壊に至ることがない。従って、機器
を大型化させることなく、信頼性を向上させることがで
きる。[Functions and Effects] The functions and effects of the present embodiment as described above are as follows. That is, the supporting insulator 3
When a surge voltage is applied in a state in which the metallic foreign matter 8 is adhered to the metal, a discharge occurs in the metallic foreign matter 8, but since the thick insulating coatings 6, 7 have high dielectric strength, they penetrate and break down, so that the entire circuit is broken down. Do not lead to. The connecting portions of the high-voltage conductor 1 and the metal container 2 are cut off by the insulating coatings 6 and 7 to form a bare portion. However, the creepage distance L1 of the insulating coating 6 of the high-voltage conductor 1 and the metal container 2 Since the creepage distance L2 of the insulating coating 7 is sufficiently longer than the discharge extension speed due to the surge voltage, the entire road is not broken. Therefore, the reliability can be improved without increasing the size of the device.
【００２２】より具体的には、一般にＳＦ６ガスを充填
した送電機器のガス絶縁開閉装置（ＧＩＳ）では、微小
な金属異物の付着等を考慮すると、支持絶縁物の沿面の
設計電界は、高電圧導体表面の設計電界の約半分であ
り、絶縁物の沿面距離はガスギャップよりも長く取る必
要がある。また、送電機器のブッシングでも、気中距離
よりもブッシングの沿面距離は約２倍以上必要としてい
る。More specifically, in general, in a gas insulated switchgear (GIS) of a power transmission device filled with SF6 gas, the design electric field on the creeping surface of the supporting insulator is high voltage in consideration of attachment of minute metallic foreign matter and the like. It is about half of the design electric field on the conductor surface, and the creepage distance of the insulator must be longer than the gas gap. Further, even in the case of the bushing of the power transmission device, the creepage distance of the bushing is required to be about twice or more than the air distance.
【００２３】本実施の形態では、Ｌ１＞ｇ、Ｌ２＞ｇと
なるように設計されているので、高電圧導体１の絶縁被
覆６の切れ目から、絶縁被覆６及び支持絶縁物３の沿面
を介して金属容器２に至る沿面距離Ｌ１＋ｇは、高電圧
導体１と金属容器２との間の距離であるガスギャップの
距離ｇの２倍以上となる。さらに、高電圧導体１の絶縁
被覆６の切れ目から、絶縁被覆６及び支持絶縁物３の沿
面を介して、金属容器２の絶縁被覆７の切れ目に至る沿
面距離Ｌ１＋ｇ＋Ｌ２は、高電圧導体１と金属容器２と
の間の距離であるガスギャップの距離ｇの３倍以上とな
る。従って、沿面放電に対してもガス中の放電と同等以
上となり、絶縁被覆の切れ目の弱点が顕著化することな
く、絶縁信頼性を向上させることができる。In the present embodiment, L1> g and L2> g are designed so that the insulating coating 6 of the high-voltage conductor 1 is cut through the insulating coating 6 and the supporting insulator 3 along the crevice. The creepage distance L1 + g reaching the metal container 2 is at least twice the gas gap distance g, which is the distance between the high-voltage conductor 1 and the metal container 2. Further, the creepage distance L1 + g + L2 from the cut of the insulating coating 6 of the high-voltage conductor 1 to the cut of the insulating coating 7 of the metal container 2 via the insulating coating 6 and the creepage of the supporting insulator 3 is determined by the distance between the high-voltage conductor 1 and the metal. It is at least three times the distance g of the gas gap, which is the distance between the container 2. Therefore, the surface discharge is equal to or higher than the discharge in the gas, and the insulation reliability can be improved without the weak point of the cut of the insulating coating becoming noticeable.
【００２４】また、上述のように絶縁性能を向上させる
ことができるので、ＳＦ６ガス以外の絶縁ガスを用いて
も、従来のガス絶縁開閉装置と同等の絶縁性能が確保で
きる。従って、高価なＳＦ６ガスの使用量を低減でき、
経済性や環境調和に優れている。Further, since the insulation performance can be improved as described above, the insulation performance equivalent to that of the conventional gas insulated switchgear can be ensured even if an insulation gas other than SF6 gas is used. Therefore, the amount of expensive SF6 gas used can be reduced,
Excellent economy and environmental harmony.
【００２５】（２）第２の実施の形態 ［構成］請求項３及び４記載の発明に対応する実施の形
態を、図２の構成図を参照して説明する。すなわち、高
電圧導体１と金属容器２との間には、これと同軸に、円
筒状のバリア絶縁物５が挿入されている。このバリア絶
縁物５の材質としては、例えば、機械強度に優れたＦＲ
Ｐ（ガラス繊維強化プラスチック）を用いることが考え
られる。バリア絶縁物５と高電圧導体１との間、バリア
絶縁物５と金属容器２との間は、それぞれ支持絶縁物３
ａ，３ｂによって絶縁支持されている。(2) Second Embodiment [Configuration] An embodiment corresponding to the third and fourth aspects of the present invention will be described with reference to the configuration diagram of FIG. That is, a cylindrical barrier insulator 5 is inserted coaxially between the high-voltage conductor 1 and the metal container 2. The material of the barrier insulator 5 is, for example, FR having excellent mechanical strength.
It is conceivable to use P (glass fiber reinforced plastic). Between the barrier insulator 5 and the high-voltage conductor 1 and between the barrier insulator 5 and the metal container 2, a supporting insulator 3 is provided.
a and 3b insulated and supported.
【００２６】そして、バリア絶縁物５の接続部から支持
絶縁物３ａとの接触部までの沿面距離をＬ−ｉｎｎｅｒ
とし、高電圧導体１とバリア絶縁物５とのガス空間の距
離であるガスギャップをｇ−ｉｎｎｅｒとすると、Ｌ−
ｉｎｎｅｒ＞ｇ−ｉｎｎｅｒとなるように設計されてい
る。また、バリア絶縁物５の接続部から支持絶縁物３ｂ
との接触部までの沿面距離をＬ−ｏｕｔｅｒとし、金属
容器２とバリア絶縁物５とのガス空間の距離であるガス
ギャップをｇ−ｏｕｔｅｒとすると、Ｌ−ｏｕｔｅｒ＞
ｇ−ｏｕｔｅｒとなるように設計されている。その他の
構成は、上記の第１の実施の形態と同様である。Then, the creepage distance from the connection portion of the barrier insulator 5 to the contact portion with the supporting insulator 3a is L-inner.
Assuming that a gas gap which is a distance of a gas space between the high-voltage conductor 1 and the barrier insulator 5 is g-inner, L-
It is designed so that inner> g-inner. In addition, the connection between the barrier insulator 5 and the support insulator 3 b
Assuming that a creepage distance to the contact portion with the metal container 2 and the gas gap which is a distance of the gas space between the metal container 2 and the barrier insulator 5 is g-outer, L-outer>
It is designed to be g-outer. Other configurations are the same as those in the first embodiment.
【００２７】［作用効果］以上のような本実施の形態の
作用効果は、以下の通りである。すなわち、支持絶縁物
３ａ，３ｂに金属異物が付着した状態でサージ電圧が印
加されると、金属異物で放電が生じるが、厚みのあるバ
リア絶縁物５は絶縁耐力が高いため、貫通破壊して全路
絶縁破壊に至ることはない。[Operation and Effect] The operation and effect of the present embodiment as described above are as follows. That is, when a surge voltage is applied in a state where the metal foreign matter is attached to the supporting insulators 3a and 3b, a discharge occurs in the metal foreign matter. However, since the thick barrier insulator 5 has a high dielectric strength, the barrier insulating material 5 is pierced and destroyed. It does not lead to all-circuit insulation breakdown.
【００２８】また、ＧＩＳ母線のガス中で、金属異物を
起点とする放電形態において、ある長手方向の長さを持
ったバリア絶縁物を挿入した場合の絶縁破壊特性を調査
した結果、雷インパルス電圧では破壊電圧が上昇してい
るが、５０Ｈｚ交流電圧では破壊電圧が上昇しない結果
が得られた。これは、波形の立ち上り時間の長い交流波
形における放電伸展速度に対してバリア絶縁物の有効距
離が短いことに起因している。従って、バリア絶縁物の
沿面絶縁距離を放電伸展距離よりも長く取ることができ
れば、全路破壊を防ぐことができることがわかる。Further, as a result of investigating the dielectric breakdown characteristics when a barrier insulator having a certain length in the longitudinal direction was inserted in a discharge mode starting from a metallic foreign substance in the gas of the GIS bus, the lightning impulse voltage was measured. Although the breakdown voltage was increased, the result that the breakdown voltage was not increased at 50 Hz AC voltage was obtained. This is because the effective distance of the barrier insulator is shorter than the discharge extension speed in an AC waveform having a long rise time of the waveform. Therefore, it can be understood that if the creepage insulation distance of the barrier insulator can be made longer than the discharge extension distance, it is possible to prevent the entire road from being destroyed.
【００２９】本実施の形態では、上記のように、Ｌ−ｉ
ｎｎｅｒ＞ｇ−ｉｎｎｅｒ、Ｌ−ｏｕｔｅｒ＞ｇ−ｏｕ
ｔｅｒとなるように設計されているので、バリア絶縁物
５の接続部から支持絶縁物３ａ，３ｂと接触部までの沿
面距離が、サージ電圧に伴う放電伸展速度に比べて十分
に長く、全路破壊に至ることない。従って、機器を大型
化させることなく、ガス絶縁開閉装置の信頼性を向上さ
せることができる。さらに、バリア絶縁物５により絶縁
性能を向上させることができるので、上記の第１の実施
の形態と同様に、ＳＦ６ガス使用量の低減効果が期待で
きる。In the present embodiment, as described above, Li
nner> g-inner, L-outer> g-ou
ter, the creepage distance from the connection portion of the barrier insulator 5 to the support insulators 3a, 3b and the contact portion is sufficiently longer than the discharge extension speed due to the surge voltage, and the No destruction. Therefore, the reliability of the gas insulated switchgear can be improved without increasing the size of the device. Further, since the insulation performance can be improved by the barrier insulator 5, the effect of reducing the amount of SF6 gas used can be expected as in the first embodiment.
【００３０】（３）第３の実施の形態 ［構成］請求項５記載の発明に対応する実施の形態を、
図３の構成図を参照して説明する。すなわち、本実施の
形態は、基本的には、上記の第２の実施の形態と同様の
構成である。但し、本実施の形態における支持絶縁物３
ａ，３ｂは、ポスト型絶縁物であり、支持絶縁物３ａ，
３ｂの円周方向の取付位置が、バリア絶縁物５の内外で
異なるように千鳥配置されている。(3) Third Embodiment [Configuration] An embodiment corresponding to the invention described in claim 5 is
This will be described with reference to the configuration diagram of FIG. That is, this embodiment has basically the same configuration as the above-described second embodiment. However, the supporting insulator 3 in the present embodiment
a and 3b are post-type insulators and support insulators 3a and 3b;
3b are staggered so that the mounting positions in the circumferential direction are different inside and outside the barrier insulator 5.
【００３１】［作用効果］以上のような本実施の形態に
よれば、上記の第２の実施の形態と同様の作用効果が得
られることに加えて、バリア絶縁物５の内外において、
支持絶縁物３ａ，３ｂの円周方向の取付位置が異なるよ
うに千鳥配置されているため、沿面距離を大きく取るこ
とができ、ガス絶縁開閉装置の信頼性をより一層向上さ
せることができる。[Effects] According to the present embodiment as described above, the same effects as those of the second embodiment can be obtained, and in addition to the above effects, the inside and outside of the barrier insulator 5 can be improved.
Since the supporting insulators 3a and 3b are staggered so that the mounting positions in the circumferential direction are different, the creepage distance can be increased and the reliability of the gas insulated switchgear can be further improved.
【００３２】（４）第４の実施の形態 ［構成］請求項６及び８記載の発明に対応する実施の形
態を、図４の構成図を参照して説明する。すなわち、本
実施の形態は、基本的には、上記の第１の実施の形態と
同様の構成である。但し、本実施の形態における絶縁被
覆６には、ひだ６ａが形成されている。また、支持絶縁
物３にも、ひだ３ｃが形成されている。(4) Fourth Embodiment [Configuration] An embodiment corresponding to the invention described in claims 6 and 8 will be described with reference to the configuration diagram of FIG. That is, the present embodiment has basically the same configuration as the above-described first embodiment. However, a fold 6a is formed on the insulating coating 6 in the present embodiment. Further, the supporting insulator 3 is also provided with a fold 3c.
【００３３】［作用効果］以上のような本実施の形態に
よれば、上記の第１の実施の形態と同様の作用効果が得
られることに加えて、絶縁被覆６がひだ６ａの付いた形
状であるため、沿面距離を大きく取ることができ、沿面
放電伸展を抑制し、ガス絶縁開閉装置の信頼性を向上さ
せることができる。さらに、支持絶縁物３がひだ３ｃの
付いた形状であることによって、より一層沿面距離を大
きく取ることができ、絶縁信頼性が向上する。[Effects] According to the present embodiment as described above, the same effects as those of the first embodiment can be obtained, and in addition, the shape in which the insulating coating 6 has the folds 6a is provided. Therefore, the creepage distance can be increased, the creeping discharge extension can be suppressed, and the reliability of the gas insulated switchgear can be improved. Further, since the supporting insulator 3 has the shape with the folds 3c, the creepage distance can be further increased, and the insulation reliability is improved.
【００３４】（５）第５の実施の形態 ［構成］請求項７記載の発明に対応する実施の形態を、
図５の構成図を参照して説明する。すなわち、本実施の
形態は、基本的には、上記の第２の実施の形態と同様の
構成である。但し、本実施の形態におけるバリア絶縁物
５にひだ５ａが形成されている。(5) Fifth Embodiment [Configuration] An embodiment corresponding to the seventh aspect of the present invention is
This will be described with reference to the configuration diagram of FIG. That is, this embodiment has basically the same configuration as the above-described second embodiment. However, a fold 5a is formed in the barrier insulator 5 in the present embodiment.
【００３５】［作用効果］以上のような本実施の形態に
よれば、上記の第２の実施の形態と同様の作用効果が得
られることに加えて、バリア絶縁物５がひだ５ａの付い
た形状であるため、沿面距離を大きく取ることができ、
沿面放電伸展を抑制し、ガス絶縁開閉装置の信頼性を向
上させることができる。[Effects] According to the present embodiment as described above, in addition to the same effects as those of the second embodiment, the barrier insulator 5 has a fold 5a. Because of the shape, it can take a large creepage distance,
Creepage discharge extension can be suppressed, and the reliability of the gas insulated switchgear can be improved.
【００３６】（６）他の実施の形態 本発明は、上記のような実施の形態に限定されるもので
はなく、各部材の材質、数、大きさ、形状等は適宜変更
可能である。例えば、絶縁被覆や支持絶縁物の材質、絶
縁ガスの種類については、上記の実施の形態で例示され
たものには限定されない。絶縁被覆の厚さも、１ｍｍ以
上であれば自由であり、例えば、高電圧導体の絶縁被覆
を１０〜２０ｍｍ、金属容器の絶縁被覆を１〜５ｍｍと
いうように、それぞれの部材に応じて厚さを変えること
もできる。支持絶縁物の数についても、上記の図面に例
示したものには限定されない。さらに、上記の第５の実
施の形態で示した支持絶縁物３ａ，３ｂにひだを形成し
て、より一層沿面距離を大きく取り、絶縁信頼性を向上
させることもできる。(6) Other Embodiments The present invention is not limited to the above-described embodiments, and the material, number, size, shape, and the like of each member can be appropriately changed. For example, the material of the insulating coating and the supporting insulator and the type of the insulating gas are not limited to those exemplified in the above embodiment. The thickness of the insulating coating is not limited as long as it is 1 mm or more. For example, the insulating coating of the high-voltage conductor is 10 to 20 mm, and the insulating coating of the metal container is 1 to 5 mm. You can change it. The number of supporting insulators is not limited to those illustrated in the above drawings. Furthermore, by forming folds in the supporting insulators 3a and 3b shown in the fifth embodiment, it is possible to further increase the creepage distance and improve insulation reliability.
【００３７】[0037]
【発明の効果】以上のように、本発明によれば、大型化
させることなく、高電圧導体及び金属容器間の絶縁物の
沿面距離を大きく取ることにより絶縁破壊を防止でき、
金属異物が付着しても絶縁性能が低下することがなく、
小形で信頼性の高い複合絶縁方式ガス絶縁開閉装置を提
供することができる。As described above, according to the present invention, insulation breakdown can be prevented by increasing the creepage distance of the insulator between the high-voltage conductor and the metal container without increasing the size.
Even if metal foreign matter adheres, insulation performance does not decrease,
A compact and highly reliable composite insulation type gas insulated switchgear can be provided.
【図１】本発明の第１の実施の形態の構成を示す軸方向
断面図。FIG. 1 is an axial sectional view showing a configuration of a first embodiment of the present invention.
【図２】本発明の第２の実施の形態の構成を示す軸方向
断面図。FIG. 2 is an axial sectional view showing a configuration of a second embodiment of the present invention.
【図３】本発明の第３の実施の形態の構成を示す径方向
断面図。FIG. 3 is a radial sectional view showing the configuration of a third embodiment of the present invention.
【図４】本発明の第４の実施の形態の構成を示す軸方向
断面図。FIG. 4 is an axial sectional view showing a configuration of a fourth embodiment of the present invention.
【図５】本発明の第５の実施の形態の構成を示す軸方向
断面図。FIG. 5 is an axial sectional view showing a configuration of a fifth embodiment of the present invention.
【図６】従来のガス絶縁開閉装置の一例を示す軸方向断
面図。FIG. 6 is an axial sectional view showing an example of a conventional gas insulated switchgear.
１…高電圧導体 ２…金属容器 ３，３ａ，３ｂ…支持絶縁物 ３ｃ，５ａ，６ａ…ひだ ５…バリア絶縁物 ６，７…絶縁被覆 ８…金属異物 ９…放電路 ４０…絶縁ガス DESCRIPTION OF SYMBOLS 1 ... High voltage conductor 2 ... Metal container 3, 3a, 3b ... Support insulator 3c, 5a, 6a ... Fold 5 ... Barrier insulator 6, 7 ... Insulation coating 8 ... Metallic foreign matter 9 ... Discharge path 40 ... Insulating gas
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０２Ｂ 13/06 Ｓ ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H02B 13/06 S
Claims (8)
電用の高電圧導体が挿通され、支持絶縁物によって絶縁
支持されたガス絶縁開閉装置において、 前記高電圧導体は接続部を介して複数接続され、 前記高電圧導体の外表面には絶縁被覆が施され、 前記高電圧導体の接続部に対応する前記絶縁被覆の切れ
目から、前記高電圧導体と前記支持絶縁物との接触部ま
での沿面距離が、前記高電圧導体と前記金属容器との間
のガス空間の距離よりも大きいことを特徴とする複合絶
縁方式ガス絶縁開閉装置。1. A gas insulated switchgear in which an energizing high-voltage conductor is inserted into a metal container filled with an insulating gas and is insulated and supported by a supporting insulator, wherein the high-voltage conductor is connected via a connecting portion. A plurality of the high-voltage conductors are provided with an insulating coating on an outer surface thereof, from a break in the insulating coating corresponding to a connection portion of the high-voltage conductor, to a contact portion between the high-voltage conductor and the supporting insulator. Wherein the creepage distance is larger than the distance of the gas space between the high-voltage conductor and the metal container.
され、 前記金属容器の内表面には絶縁被覆が施され、 前記金属容器の接続部に対応する前記絶縁被覆の切れ目
から、前記高電圧導体と前記支持絶縁物との接触部まで
の沿面距離が、前記高電圧導体と前記金属容器との間の
ガス空間の距離よりも大きいことを特徴とする請求項１
記載の複合絶縁方式ガス絶縁開閉装置。2. A plurality of the metal containers are connected via a connecting portion, an inner surface of the metal container is provided with an insulating coating, and a height of the insulating container corresponding to the connecting portion of the metal container is increased. The creepage distance between a contact portion between a voltage conductor and the supporting insulator is larger than a distance of a gas space between the high-voltage conductor and the metal container.
The composite insulating gas-insulated switchgear according to the above.
電用の高電圧導体が挿通され、前記高電圧導体と前記金
属容器との間にバリア絶縁物が挿入され、前記高電圧導
体と前記バリア絶縁物との間が第１の支持絶縁物によっ
て絶縁支持され、前記バリア絶縁物と前記金属容器との
間が第２の支持絶縁物によって絶縁支持された複合絶縁
方式ガス絶縁開閉装置において、 前記バリア絶縁物は接続部を介して複数接続され、 前記バリア絶縁物の接続部から、前記高電圧導体と前記
第１の支持絶縁物との接触部までの沿面距離が、前記高
電圧導体と前記バリア絶縁物との間のガス空間の距離よ
りも大きいことを特徴とする複合絶縁方式ガス絶縁開閉
装置。3. An energizing high-voltage conductor is inserted into a metal container filled with an insulating gas, and a barrier insulator is inserted between the high-voltage conductor and the metal container. In a compound insulating type gas insulated switchgear in which a gap between the barrier insulator and the metal container is insulated and supported by a first support insulator and a gap between the barrier insulator and the metal container is insulated and supported by a second support insulator. A plurality of the barrier insulators are connected via a connection portion, and a creeping distance from a connection portion of the barrier insulator to a contact portion between the high-voltage conductor and the first support insulator is the high-voltage conductor. A composite insulating type gas insulated switchgear, wherein the distance is greater than a distance of a gas space between the gas barrier and the barrier insulator.
の支持絶縁物との接続部までの沿面距離が、前記バリア
絶縁物と前記金属容器との間のガス空間の距離よりも大
きいことを特徴とする請求項３記載の複合絶縁方式ガス
絶縁開閉装置。4. The method according to claim 1, further comprising:
4. The composite insulated gas insulated switchgear according to claim 3, wherein a creepage distance to a connection portion with the supporting insulator is larger than a distance of a gas space between the barrier insulator and the metal container. .
電用の高電圧導体が挿通され、前記高電圧導体と前記金
属容器との間にバリア絶縁物が挿入され、前記高電圧導
体と前記バリア絶縁物との間が第１の支持絶縁物によっ
て絶縁支持され、前記バリア絶縁物と前記金属容器との
間が第２の支持絶縁物によって絶縁支持された複合絶縁
方式ガス絶縁開閉装置において、 前記第１の支持絶縁物と前記第２の支持絶縁物とは、円
周方向に互いに異なる位置に配置されていることを特徴
とする複合絶縁方式ガス絶縁開閉装置。5. An energizing high-voltage conductor is inserted into a metal container filled with an insulating gas, and a barrier insulator is inserted between the high-voltage conductor and the metal container. In a compound insulating type gas insulated switchgear in which a gap between the barrier insulator and the metal container is insulated and supported by a first support insulator and a gap between the barrier insulator and the metal container is insulated and supported by a second support insulator. The composite insulating type gas insulated switchgear, wherein the first supporting insulator and the second supporting insulator are arranged at positions different from each other in a circumferential direction.
電用の高電圧導体が挿通され、支持絶縁物によって絶縁
支持されたガス絶縁開閉装置において、 前記高電圧導体は接続部を介して複数接続され、 前記高電圧導体の外表面及び前記金属容器の内表面の少
なくとも一方には、絶縁被覆が施され、 前記絶縁被覆は、ひだを有していることを特徴とする複
合絶縁方式ガス絶縁開閉装置。6. A gas-insulated switchgear, in which a high-voltage conductor for electric conduction is inserted into a metal container filled with an insulating gas and is insulated and supported by a supporting insulator, wherein the high-voltage conductor is connected via a connecting portion. A plurality of connected, an insulating coating is applied to at least one of an outer surface of the high-voltage conductor and an inner surface of the metal container, wherein the insulating coating has a pleat; Insulated switchgear.
電用の高電圧導体が挿通され、前記高電圧導体と前記金
属容器との間にバリア絶縁物が挿入され、前記高電圧導
体と前記バリア絶縁物との間が第１の支持絶縁物によっ
て絶縁支持され、前記バリア絶縁物と前記金属容器との
間が第２の支持絶縁物によって絶縁支持された複合絶縁
方式ガス絶縁開閉装置において、 前記バリア絶縁物は、ひだを有していることを特徴とす
る複合絶縁方式ガス絶縁開閉装置。7. An energizing high-voltage conductor is inserted into a metal container filled with an insulating gas, and a barrier insulator is inserted between the high-voltage conductor and the metal container. In a compound insulating type gas insulated switchgear in which a gap between the barrier insulator and the metal container is insulated and supported by a first support insulator and a gap between the barrier insulator and the metal container is insulated and supported by a second support insulator. The composite insulating gas-insulated switchgear, wherein the barrier insulator has a fold.
及び前記第２の支持絶縁物の少なくとも一つは、ひだを
有していることを特徴とする請求項１〜７のいずれか１
項に記載の複合絶縁方式ガス絶縁開閉装置。8. The method according to claim 1, wherein at least one of the supporting insulator, the first supporting insulator, and the second supporting insulator has a fold. 1
Item 9. The composite insulated gas insulated switchgear according to item 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000343032A JP4253434B2 (en) | 2000-11-10 | 2000-11-10 | Compound insulation type gas insulated switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000343032A JP4253434B2 (en) | 2000-11-10 | 2000-11-10 | Compound insulation type gas insulated switchgear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002152927A true JP2002152927A (en) | 2002-05-24 |
| JP4253434B2 JP4253434B2 (en) | 2009-04-15 |
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ID=18817469
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000343032A Expired - Fee Related JP4253434B2 (en) | 2000-11-10 | 2000-11-10 | Compound insulation type gas insulated switchgear |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008271744A (en) * | 2007-04-24 | 2008-11-06 | Mitsubishi Electric Corp | Gas insulated electrical device |
| JP2010081759A (en) * | 2008-09-26 | 2010-04-08 | Toshiba Corp | Gas-blast circuit breaker |
| WO2012137444A1 (en) * | 2011-04-01 | 2012-10-11 | 株式会社 東芝 | Hermetically sealed switchgear |
| CN111948719A (en) * | 2020-08-24 | 2020-11-17 | 国网宁夏电力有限公司电力科学研究院 | GIS internal foreign matter diagnosis device and diagnosis method |
-
2000
- 2000-11-10 JP JP2000343032A patent/JP4253434B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008271744A (en) * | 2007-04-24 | 2008-11-06 | Mitsubishi Electric Corp | Gas insulated electrical device |
| JP2010081759A (en) * | 2008-09-26 | 2010-04-08 | Toshiba Corp | Gas-blast circuit breaker |
| WO2012137444A1 (en) * | 2011-04-01 | 2012-10-11 | 株式会社 東芝 | Hermetically sealed switchgear |
| JP2012217308A (en) * | 2011-04-01 | 2012-11-08 | Toshiba Corp | Closed switchgear |
| CN103444035A (en) * | 2011-04-01 | 2013-12-11 | 株式会社东芝 | Hermetically sealed switchgear |
| CN111948719A (en) * | 2020-08-24 | 2020-11-17 | 国网宁夏电力有限公司电力科学研究院 | GIS internal foreign matter diagnosis device and diagnosis method |
| CN111948719B (en) * | 2020-08-24 | 2024-06-04 | 国网宁夏电力有限公司电力科学研究院 | GIS internal foreign matter diagnosis device and diagnosis method |
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| Publication number | Publication date |
|---|---|
| JP4253434B2 (en) | 2009-04-15 |
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