JPH0530626A - Composite insulation system bus - Google Patents
Composite insulation system busInfo
- Publication number
- JPH0530626A JPH0530626A JP3180073A JP18007391A JPH0530626A JP H0530626 A JPH0530626 A JP H0530626A JP 3180073 A JP3180073 A JP 3180073A JP 18007391 A JP18007391 A JP 18007391A JP H0530626 A JPH0530626 A JP H0530626A
- Authority
- JP
- Japan
- Prior art keywords
- voltage conductor
- metal container
- insulating
- coating
- foreign matter
- 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
Landscapes
- Gas-Insulated Switchgears (AREA)
- Installation Of Bus-Bars (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、絶縁媒体として絶縁性
ガスを使用してなるガス絶縁母線に係り、特に、絶縁性
ガスに加えて第２の絶縁媒体を使用してなる複合絶縁方
式母線に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated bus bar using an insulating gas as an insulating medium, and more particularly to a composite insulating-type bus bar using a second insulating medium in addition to the insulating gas. Regarding
【０００２】[0002]
【従来の技術】一般に、絶縁媒体として絶縁性ガスを使
用してなるガス絶縁母線は、図６に示すように、例えば
ＳＦ6 ガス１のような絶縁性能の優れた絶縁性ガスを圧
縮充填した金属容器２内に、高電圧導体３を挿通し、こ
の高電圧導体３を支持絶縁物４にて金属容器２から絶縁
支持する構造となっている。そして、支持絶縁物４に
は、高電圧導体３側に高電圧電極４ａが、金属容器２側
に接地電極４ｂが、それぞれ埋め込まれている。支持絶
縁物４は、これらの高電圧電極４ａ、接地電極４ｂを介
して高電圧導体３と金属容器２の間に保持されている。2. Description of the Related Art In general, a gas-insulated bus bar using an insulating gas as an insulating medium is compressed and filled with an insulating gas having an excellent insulating performance such as SF 6 gas 1 as shown in FIG. The high-voltage conductor 3 is inserted into the metal container 2, and the high-voltage conductor 3 is insulated and supported from the metal container 2 by the support insulator 4. Then, in the supporting insulator 4, a high voltage electrode 4a is embedded on the high voltage conductor 3 side and a ground electrode 4b is embedded on the metal container 2 side. The supporting insulator 4 is held between the high-voltage conductor 3 and the metal container 2 via the high-voltage electrode 4a and the ground electrode 4b.
【０００３】このようなＳＦ6 ガス１が封入されたガス
絶縁母線において、高電圧導体３と金属容器２間の絶縁
強度は、絶縁媒体であるＳＦ6 ガス１の高い絶縁性能
と、支持絶縁物４の形状により維持されている。そのた
め、ガス絶縁母線は通常、高い絶縁強度を有する。In such a gas-insulated bus bar filled with SF 6 gas 1, the insulation strength between the high-voltage conductor 3 and the metal container 2 depends on the high insulation performance of the SF 6 gas 1 as an insulating medium and the supporting insulator. It is maintained by the shape of 4. Therefore, the gas-insulated busbar usually has high insulation strength.
【０００４】ところで、図６に示すようなガス絶縁母線
において、何らかの原因により、金属異物が金属容器２
内に混入すると、高電圧導体３に課電されている運転電
圧による静電気力の影響で金属異物が浮遊する。もし、
異物が針状金属であれば起立してしまい、高電圧導体３
または支持絶縁物４に付着し、場合によってはガス絶縁
母線の絶縁性能を著しく低下させる恐れがある。そのた
め、このような金属異物対策として、従来、種々のトラ
ップ装置を設け、強制的に低電界部に異物を捕獲してし
まう構造や、金属容器２内表面に絶縁材料を塗布して絶
縁被覆を形成し、この絶縁被覆を第２の絶縁媒体として
使用し、複合絶縁方式母線とする方法が提案されてい
る。この場合、図７は、後者の方法を採用してなる複合
絶縁方式母線の具体的構造を示すもので、金属容器２の
内表面には、固有抵抗の高い材料によって数１００μｍ
程度の絶縁被覆５が施されている。このような絶縁被覆
５を施した場合には、運転電圧に対しても、金属異物が
浮遊することはなく、絶縁被覆５上に保持される。By the way, in a gas-insulated bus bar as shown in FIG.
If mixed in, the foreign metal particles float due to the influence of the electrostatic force due to the operating voltage applied to the high-voltage conductor 3. if,
If the foreign matter is a needle-shaped metal, it will stand up and the high voltage conductor 3
Alternatively, it may adhere to the supporting insulator 4, and depending on the case, the insulating performance of the gas-insulated bus bar may be significantly reduced. Therefore, as a countermeasure against such metal foreign matter, conventionally, various trap devices are provided to forcibly capture the foreign matter in the low electric field portion, or an insulating material is applied to the inner surface of the metal container 2 to form an insulating coating. A method of forming a composite insulation type bus bar by using this insulation coating as a second insulation medium has been proposed. In this case, FIG. 7 shows a specific structure of the composite insulation type bus bar adopting the latter method, in which the inner surface of the metal container 2 is several hundred μm due to a material having a high specific resistance.
A degree of insulating coating 5 is applied. When such an insulating coating 5 is applied, the metallic foreign matter does not float even with respect to the operating voltage and is retained on the insulating coating 5.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上述し
たような従来技術には、次のような問題点が存在してい
る。すなわち、図７に示すような複合絶縁方式母線にお
いては、通常の運転電圧に対しては、前述した通り、金
属異物が絶縁被覆５上に保持される反面、金属容器２に
機械的振動が加わった場合には、その機械的衝撃力によ
り、金属異物がわずかに動き、その反動で起立・浮上し
てしまう恐れがある。このような状態になると、絶縁被
覆５による前述の金属異物抑制効果が完全に損われ、複
合絶縁方式母線の絶縁耐力の低下を生じる問題がある。
このような絶縁耐力の低下は、さらに、ガス絶縁母線の
高電圧導体３と金属容器２の径方向の寸法を拡大させ、
母線の縮小化の障害となっている。However, the above-mentioned conventional techniques have the following problems. That is, in the composite insulation type bus bar as shown in FIG. 7, with respect to the normal operating voltage, as described above, the metal foreign matter is held on the insulating coating 5, but the metal container 2 is subjected to mechanical vibration. In that case, the mechanical impact force may cause the metallic foreign matter to slightly move, and the reaction may cause the metallic foreign matter to stand and float. In such a state, there is a problem in that the above-described effect of suppressing the metallic foreign matter by the insulating coating 5 is completely impaired, and the dielectric strength of the composite insulation type bus bar is lowered.
Such a decrease in dielectric strength further increases the radial dimensions of the high-voltage conductor 3 of the gas-insulated busbar and the metal container 2,
This is an obstacle to the downsizing of busbars.
【０００６】また、この種のガス絶縁母線に用いられて
いる支持絶縁物４は、ほとんどエポキシ樹脂による注型
品である。近年、エポキシ注型品の耐熱性向上の他の樹
脂開発が盛んであるが、現在の実使用状態において、エ
ポキシ注型品の耐熱温度は１３０℃程度と低い。そのた
め、前述の絶縁的な問題と同様に、ガス絶縁母線の高電
圧導体３の温度を１３０℃に抑えるべく、高電圧導体３
と金属容器２の径方向寸法が拡大し、母線の縮小化の障
害となっている。The supporting insulator 4 used in this type of gas-insulated bus bar is almost a cast product made of epoxy resin. In recent years, other resins have been developed to improve the heat resistance of epoxy cast products, but in the current actual use state, the heat resistant temperature of epoxy cast products is as low as about 130 ° C. Therefore, similar to the above-mentioned insulation problem, in order to keep the temperature of the high voltage conductor 3 of the gas insulated bus bar at 130 ° C, the high voltage conductor 3
And the radial dimension of the metal container 2 increases, which is an obstacle to the reduction of the busbar.
【０００７】本発明は、上記のような従来技術の課題を
解決するために提案されたものであり、その目的は、絶
縁性ガスに加えて使用する第２の絶縁媒体の構成を改善
して金属異物の挙動を確実に抑制可能とすることによ
り、高い耐電圧性能及び耐熱性を有し、しかも、縮小化
に貢献し得るような複合絶縁方式母線を提供することで
ある。The present invention has been proposed in order to solve the problems of the prior art as described above, and its object is to improve the structure of the second insulating medium used in addition to the insulating gas. It is an object of the present invention to provide a composite insulation type bus bar that has high withstand voltage performance and heat resistance and can contribute to reduction in size by reliably suppressing the behavior of metallic foreign matters.
【０００８】[0008]
【課題を解決するための手段】本発明の複合絶縁方式母
線は、第１の絶縁媒体として絶縁性ガスが充填された金
属容器と、この金属容器内に配置された高電圧導体と、
この高電圧導体を金属容器から絶縁支持する支持絶縁物
と、第２の絶縁媒体を備えた複合絶縁方式母線におい
て、第２の絶縁媒体が、高電圧導体の外表面及び金属容
器の内表面にそれぞれ設けられたフッ素樹脂被覆であ
り、高電圧導体が、金属容器に対して、金属容器のフッ
素樹脂被覆、支持絶縁物、及び高電圧導体のフッ素樹脂
被覆を介して絶縁支持されたことを特徴としている。A composite insulation type bus bar of the present invention comprises a metal container filled with an insulating gas as a first insulating medium, and a high-voltage conductor arranged in the metal container.
In a composite insulation type busbar including a supporting insulator for insulating and supporting the high-voltage conductor from the metal container, and a second insulating medium, the second insulating medium is provided on the outer surface of the high-voltage conductor and the inner surface of the metal container. Each is a fluororesin coating provided, and the high-voltage conductor is insulated and supported on the metal container through the fluororesin coating of the metal container, the supporting insulator, and the fluororesin coating of the high-voltage conductor. I am trying.
【０００９】また、高電圧導体の外表面に設けるフッ素
樹脂被覆の厚さが１０〜２０ｍｍの範囲とされることが
望ましい。これに対し、金属容器の内表面に設けるフッ
素樹脂被覆の厚さは、１〜５ｍｍの範囲とされることが
望ましい。Further, it is desirable that the thickness of the fluororesin coating provided on the outer surface of the high voltage conductor is in the range of 10 to 20 mm. On the other hand, the thickness of the fluororesin coating provided on the inner surface of the metal container is preferably in the range of 1 to 5 mm.
【００１０】[0010]
【作用】本発明の複合絶縁方式母線によれば、高電圧導
体と金属容器を、絶縁耐力及び振動吸収特性の優れたフ
ッ素樹脂で被覆することにより、運転電圧の静電気力ま
たは何らかの機械的衝撃力に対して、金属異物を保持で
き、その起立・浮上を防止できる。そして、これらの静
電気力または機械的衝撃力に対して、仮に、金属異物が
起立・浮上しても、この金属異物は、高電圧導体のフッ
素樹脂被覆に付着し、この状態で金属異物とフッ素樹脂
被覆の間に静電吸引力が作用するため、金属異物をその
場所にトラップすることができる。さらにまた、仮に、
金属異物が支持絶縁物に付着し、サ―ジ電圧の侵入によ
って金属異物で放電が生じても、高電圧導体と金属容器
にそれぞれ設けられたフッ素樹脂被覆の優れた絶縁耐力
により、全路破壊を防ぐことができる。According to the composite insulation type bus bar of the present invention, by coating the high-voltage conductor and the metal container with a fluororesin having excellent dielectric strength and vibration absorption characteristics, the electrostatic force of the operating voltage or some mechanical impact force is applied. On the other hand, the metallic foreign matter can be held and its rising and floating can be prevented. Even if the metallic foreign matter stands up or floats up against these electrostatic force or mechanical impact force, the metallic foreign matter adheres to the fluororesin coating of the high-voltage conductor, and in this state, the metallic foreign matter and the fluorine Since the electrostatic attraction acts between the resin coatings, it is possible to trap the metallic foreign matter at that location. Furthermore, if
Even if metal foreign matter adheres to the supporting insulator and discharge occurs due to the penetration of surge voltage, the high voltage conductor and the fluororesin coating provided on the metal container respectively have excellent dielectric strength and destroy the entire road. Can be prevented.
【００１１】その上、フッ素樹脂は、優れた耐熱特性を
有しており、具体的には、２００℃以上もの高い連続使
用温度を有している。従って、絶縁耐力の向上に合わせ
て、耐熱性を向上できるため、高電圧導体と金属容器の
径方向寸法を縮小でき、母線の縮小化に貢献できる。In addition, the fluororesin has excellent heat resistance characteristics, and specifically has a high continuous use temperature of 200 ° C. or higher. Therefore, since the heat resistance can be improved along with the improvement of the dielectric strength, the radial dimension of the high-voltage conductor and the metal container can be reduced, which contributes to the reduction of the busbar.
【００１２】また、高電圧導体の外表面に設けるフッ素
樹脂被覆の厚さを１０〜２０ｍｍの範囲とした場合に
は、金属異物が、高電圧導体の外表面から１０〜２０ｍ
ｍ以内に接近できないため、フラッシオーバ電圧の低下
を確実に防止でき、絶縁耐力を向上できる。これに対
し、金属容器の内表面に設けるフッ素樹脂被覆の厚さを
１〜５ｍｍの範囲とした場合には、支持絶縁物の沿面の
金属異物による放電進展を有効に防止できる。Further, when the thickness of the fluororesin coating provided on the outer surface of the high-voltage conductor is in the range of 10 to 20 mm, metal foreign matter is 10 to 20 m from the outer surface of the high-voltage conductor.
Since it is not possible to approach within m, it is possible to reliably prevent the decrease of the flashover voltage and improve the dielectric strength. On the other hand, when the thickness of the fluororesin coating provided on the inner surface of the metal container is in the range of 1 to 5 mm, it is possible to effectively prevent the discharge development due to the metallic foreign matter on the surface of the supporting insulator.
【００１３】[0013]
【実施例】以下、本発明による複合絶縁方式母線の一実
施例を、図１に基づいて具体的に説明する。なお、図６
及び図７に示した従来技術と同一部材には、同一符号を
付し、説明は省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the composite insulation type bus bar according to the present invention will be specifically described below with reference to FIG. Note that FIG.
The same members as those of the conventional technique shown in FIG. 7 are designated by the same reference numerals, and the description thereof will be omitted.
【００１４】本実施例においては、図１に示すように、
高電圧導体３の外表面と金属容器２の内表面に、ＰＦ
Ａ、ＦＥＰ、ＰＴＦＥなどのフッ素樹脂によって、高電
圧導体フッ素樹脂被覆６、金属容器フッ素樹脂被覆７が
設けられている。この場合、高電圧導体フッ素樹脂被覆
６の被覆厚さは１０〜２０ｍｍ、金属容器フッ素樹脂被
覆７の被覆厚さは１〜５ｍｍとされている。そして、こ
れらの高電圧導体フッ素樹脂被覆６と金属容器フッ素樹
脂被覆７の間に、支持絶縁物８が設けられている。すな
わち、高電圧導体３は、金属容器２に対して、金属容器
フッ素樹脂被覆７、支持絶縁物８、及び高電圧導体フッ
素樹脂被覆６を介して絶縁支持されている。また、金属
容器２内には、従来と同様に、絶縁性ガスとしてＳＦ6
ガス１が封入されている。従って、図１の実施例におい
ては、第１の絶縁媒体として、ＳＦ6 ガス１というガス
絶縁材料が使用されると共に、第２の絶縁媒体として、
高電圧導体フッ素樹脂被覆６及び金属容器フッ素樹脂被
覆７という固体絶縁材料が使用されており、これら２種
類の絶縁媒体の複合によって高電圧導体３と金属容器２
間の絶縁が保持されるようになっている。以上のような
構成を有する本実施例の複合絶縁方式母線においては、
以下に述べるような作用効果が得られる。In this embodiment, as shown in FIG.
On the outer surface of the high voltage conductor 3 and the inner surface of the metal container 2, the PF
A high-voltage conductor fluororesin coating 6 and a metal container fluororesin coating 7 are provided with a fluororesin such as A, FEP, or PTFE. In this case, the high-voltage conductor fluororesin coating 6 has a coating thickness of 10 to 20 mm, and the metal container fluororesin coating 7 has a coating thickness of 1 to 5 mm. A supporting insulator 8 is provided between the high-voltage conductor fluororesin coating 6 and the metal container fluororesin coating 7. That is, the high-voltage conductor 3 is insulated and supported with respect to the metal container 2 via the metal-container fluororesin coating 7, the supporting insulator 8, and the high-voltage conductor fluororesin coating 6. Further, in the metal container 2, as in the conventional case, SF 6 is used as an insulating gas.
Gas 1 is enclosed. Therefore, in the embodiment of FIG. 1, a gas insulating material called SF 6 gas 1 is used as the first insulating medium, and as the second insulating medium,
A high-voltage conductor fluororesin coating 6 and a metal container fluororesin coating 7 are used as solid insulating materials, and the high-voltage conductor 3 and the metal container 2 are formed by combining these two types of insulating media.
The insulation between them is maintained. In the composite insulation type bus bar of the present embodiment having the above configuration,
The following operational effects can be obtained.
【００１５】まず、図２は、ガス絶縁母線において、高
電圧導体３と金属容器２間のギャップ空間に金属異物が
位置する状態で、サ―ジ電圧が印加された場合の金属異
物の浮上高さｇとフラッシオ―バ電圧の関係を示す説明
図である。この図２からわかるように、金属異物に対す
るフラッシオ―バ電圧は、金属異物が高電圧導体３の表
面から約５ｍｍ以内の位置に接近した場合に、著しく低
下する。そして、金属異物が高電圧導体３の表面から約
５ｍｍ以上離れると、フラッシオ―バ電圧は急激に上昇
する。従って、ガス絶縁母線におけるギャップ空間での
フラッシオ―バ電圧は、金属異物が位置する電界分布に
影響される。First, FIG. 2 shows the floating height of the metallic foreign matter when a surge voltage is applied to the gas insulated busbar in the state where the metallic foreign matter is located in the gap space between the high voltage conductor 3 and the metal container 2. It is an explanatory view showing the relation between the degree g and the ratio-bar voltage. As can be seen from FIG. 2, the flood ratio bar voltage with respect to the metallic foreign matter drops significantly when the metallic foreign matter approaches a position within about 5 mm from the surface of the high-voltage conductor 3. Then, when the metallic foreign matter is separated from the surface of the high-voltage conductor 3 by about 5 mm or more, the ratio ratio voltage rapidly rises. Therefore, the flood ratio bar voltage in the gap space of the gas insulated bus is affected by the electric field distribution in which the metallic foreign matter is located.
【００１６】これに対し、本実施例の複合絶縁方式母線
は、高電圧導体３にフッ素樹脂が１０〜２０ｍｍ被覆さ
れているため、金属異物は、高電圧導体３表面から１０
〜２０ｍｍ以内に近付くことがない。そして、図３に示
すように、本実施例において、金属異物９が高電圧導体
フッ素樹脂被覆６に到達すると、この金属異物９は、そ
の付着面積が最大になる形で、高電圧導体フッ素樹脂被
覆６に付着する。金属異物９がこのような状態で高電圧
導体フッ素樹脂被覆６に付着した場合には、フラッシオ
―バ電圧は、ほとんど低下しない。従って、本実施例に
おいては、従来技術に比べて、絶縁耐性を格段に向上で
き、絶縁信頼性が維持できる。On the other hand, in the composite insulation type bus bar of the present embodiment, since the high voltage conductor 3 is covered with the fluororesin in an amount of 10 to 20 mm, the metallic foreign matter is separated from the surface of the high voltage conductor 3 by 10 mm.
There is no approach within ~ 20 mm. Then, as shown in FIG. 3, when the metallic foreign matter 9 reaches the high-voltage conductor fluororesin coating 6 in this embodiment, the metallic foreign matter 9 has a maximum adhesion area, and the high-voltage conductor fluororesin is formed. Adhere to coating 6. When the metallic foreign matter 9 adheres to the high-voltage conductor fluororesin coating 6 in such a state, the flat ratio voltage hardly decreases. Therefore, in this embodiment, the insulation resistance can be remarkably improved and the insulation reliability can be maintained as compared with the prior art.
【００１７】次に、支持絶縁物８の沿面に金属異物９が
付着した場合について考えてみる。この場合、図４に示
すように、金属異物９が支持絶縁物８の沿面に垂直に付
着することがあり得る。この状態で過大なサ―ジ電圧が
印加されると、金属異物９で放電が生じるが、高電圧導
体フッ素樹脂被覆６と金属容器フッ素樹脂被覆７の絶縁
耐力が高いため、全路絶縁破壊に至ることはない。Next, let us consider the case where the metallic foreign matter 9 adheres to the surface of the supporting insulator 8. In this case, as shown in FIG. 4, the metallic foreign matter 9 may adhere vertically to the creeping surface of the supporting insulator 8. If an excessive surge voltage is applied in this state, discharge will occur due to the foreign metal 9, but since the high voltage conductor fluororesin coating 6 and the metal container fluororesin coating 7 have high dielectric strength, all-way dielectric breakdown will occur. It never arrives.
【００１８】ここで、本実施例における金属容器フッ素
樹脂被覆７の作用を明確化するために、本実施例に対す
る比較例として、例えば、高電圧導体３のみに絶縁耐力
を有する厚さのフッ素樹脂被覆を施し、金属容器２内表
面には全く絶縁被覆を施さない複合絶縁方式母線や、あ
るいは、従来技術のように、金属容器２の内表面に、数
１００μｍ程度の絶縁被覆を施しただけの複合絶縁方式
母線の支持絶縁物８の沿面に、金属異物が付着した場合
について説明する。すなわち、サ―ジ電圧によって金属
異物９の放電が生じると、金属容器２に絶縁被覆がない
場合、進展した放電路は接地電位になる。また、図５に
示すように、金属容器２の内表面に絶縁被覆５が施され
ていても、この絶縁被覆５が従来技術のように数１００
μｍ程度であると、放電進展と共に絶縁破壊する可能性
があり、この場合も、放電路は接地電位になる。このよ
うな状態になると、放電は、高電圧導体フッ素樹脂被覆
６の沿面を進展し、最終的に全路絶縁破壊に至る恐れが
ある。これに対し、本実施例の金属容器フッ素樹脂被覆
７は、１〜５ｍｍの厚さを有しており、高い絶縁耐圧を
有するため、支持絶縁物８の沿面の金属異物による放電
進展を有効に防止することができる。Here, in order to clarify the action of the metal container fluororesin coating 7 in this embodiment, as a comparative example to this embodiment, for example, only the high-voltage conductor 3 has a thickness of fluororesin having dielectric strength. A composite insulation type bus bar that is coated and has no inner coating on the inner surface of the metal container 2, or, as in the prior art, only the inner surface of the metal container 2 is coated with an insulating coating of about several hundred μm. A case where a metallic foreign substance adheres to the surface of the support insulator 8 of the composite insulation type busbar will be described. That is, when the foreign metal 9 is discharged by the surge voltage, the developed discharge path becomes the ground potential unless the metal container 2 has an insulating coating. Further, as shown in FIG. 5, even if the inner surface of the metal container 2 is coated with the insulating coating 5, the insulating coating 5 is several hundreds as in the conventional technique.
If the thickness is about μm, dielectric breakdown may occur as the discharge progresses, and in this case also, the discharge path becomes the ground potential. In such a state, the discharge may progress along the creeping surface of the high-voltage conductor fluororesin coating 6 and eventually lead to all-way dielectric breakdown. On the other hand, since the metal container fluororesin coating 7 of the present embodiment has a thickness of 1 to 5 mm and has a high withstand voltage, it effectively discharges due to foreign metal particles on the surface of the supporting insulator 8. Can be prevented.
【００１９】さらに、本実施例の複合絶縁方式母線にお
ける熱的な作用について説明する。すなわち、高電圧導
体３の外表面に被覆を設けた場合、一般的に考えれば、
この被覆によって高電圧導体３で発生する熱の放散が悪
くなり、高電圧導体３の温度上昇が生じ、その高温によ
って被覆が劣化する恐れがある。しかしながら、本発明
で使用しているフッ素樹脂は耐熱性に優れ、連続最高使
用温度が他の絶縁物に比べて格段に高いという優れた特
徴を有している。例えば、ＰＦＡが２６０℃、ＦＥＰが
２００℃、ＰＴＦＥが２６０℃の連続使用温度に耐え
る。従って、高電圧導体３の温度がある程度上昇して
も、本発明に従う高電圧導体フッ素樹脂被覆６は、その
温度に十分耐えることができるため、被覆の劣化を生じ
ることはなく、信頼性が高い。Further, the thermal action of the composite insulation type bus bar of this embodiment will be described. That is, when a coating is provided on the outer surface of the high-voltage conductor 3, generally speaking,
Due to this coating, the dissipation of heat generated in the high-voltage conductor 3 is deteriorated, the temperature of the high-voltage conductor 3 rises, and the high temperature thereof may deteriorate the coating. However, the fluororesin used in the present invention is excellent in heat resistance and has an excellent feature that the continuous maximum operating temperature is significantly higher than that of other insulators. For example, it withstands continuous use temperatures of 260 ° C. for PFA, 200 ° C. for FEP, and 260 ° C. for PTFE. Therefore, even if the temperature of the high-voltage conductor 3 rises to some extent, the high-voltage conductor fluororesin coating 6 according to the present invention can sufficiently withstand the temperature, so that the coating does not deteriorate and the reliability is high. ..
【００２０】以上説明したように、本実施例の複合絶縁
方式母線においては、高電圧導体フッ素樹脂被覆６及び
金属容器フッ素樹脂被覆７の作用により、従来に比べて
格段に高い絶縁耐力及び耐熱性を得られる。このことに
よってまた、高電圧導体と金属容器の径方向寸法を従来
に比べて大幅に縮小できるため、母線の縮小化に貢献で
きる利点もある。As described above, in the composite insulation type bus bar of this embodiment, due to the actions of the high-voltage conductor fluororesin coating 6 and the metal container fluororesin coating 7, the dielectric strength and heat resistance are remarkably higher than in the conventional case. Can be obtained. This also has the advantage that the radial dimensions of the high-voltage conductor and the metal container can be significantly reduced as compared with the conventional one, which can contribute to the reduction of the busbar.
【００２１】[0021]
【発明の効果】上記の通り、本発明によれば、絶縁性ガ
スに加えて、第２の絶縁媒体として、高電圧導体の外表
面及び金属容器の内表面に、フッ素樹脂被覆を設けるこ
とにより、金属容器内に存在する金属異物の挙動を確実
に抑制可能であり、サ―ジ電圧に対しても絶縁性能を維
持できるため、従来に比べて格段に高い耐電圧性能及び
耐熱性を有し、しかも、縮小化に貢献し得るような複合
絶縁方式母線を提供することができる。As described above, according to the present invention, in addition to the insulating gas, as the second insulating medium, the outer surface of the high-voltage conductor and the inner surface of the metal container are provided with the fluororesin coating. Since it is possible to reliably suppress the behavior of foreign metal particles existing in the metal container and maintain the insulation performance against serge voltage, it has much higher withstand voltage performance and heat resistance than before. Moreover, it is possible to provide a composite insulation type bus bar that can contribute to reduction in size.
【図１】本発明による複合絶縁方式母線の一実施例を示
す模式的断面図。FIG. 1 is a schematic sectional view showing an embodiment of a composite insulation type bus bar according to the present invention.
【図２】ガス絶縁母線における金属異物とフラッシオ―
バ電圧の関係を示す説明図。[Fig.2] Metal foreign matter and ratio in gas insulated busbar
Explanatory drawing which shows the relationship of voltage.
【図３】図１の複合絶縁方式母線において、高電圧導体
フッ素樹脂被覆への金属異物の付着状態を示す模式的断
面図。FIG. 3 is a schematic cross-sectional view showing a state of adhesion of metallic foreign matter to a high-voltage conductor fluororesin coating in the composite insulation type bus bar of FIG.
【図４】図１の複合絶縁方式母線において、支持絶縁物
沿面への金属異物の付着状態を示す模式的断面図。FIG. 4 is a schematic cross-sectional view showing a state in which metal foreign matter adheres to the surface of a supporting insulator in the composite insulation type bus bar of FIG.
【図５】高電圧導体のみにフッ素樹脂被覆を施し、金属
容器の内表面には数１００μｍ程度の絶縁被覆を施した
だけの複合絶縁方式母線において、支持絶縁物沿面に金
属異物が付着した場合の放電進展を説明する説明図。FIG. 5: When a foreign metal adheres to the surface of the supporting insulator in a composite insulation type busbar in which only the high-voltage conductor is coated with fluororesin and the inner surface of the metal container is provided with an insulation coating of about several hundred μm Explanatory diagram for explaining the discharge progress of FIG.
【図６】従来の複合絶縁方式母線ではないガス絶縁母線
の一例を示す模式的断面図。FIG. 6 is a schematic cross-sectional view showing an example of a gas-insulated bus bar that is not a conventional composite insulation-type bus bar.
【図７】従来の複合絶縁方式母線の一例を示す模式的断
面図。FIG. 7 is a schematic cross-sectional view showing an example of a conventional composite insulation type bus bar.
１ … ＳＦ6 ガス ２ … 金属容器 ３ … 高電圧導体 ４ … 支持絶縁物 ４ａ … 高電圧電極 ４ｂ … 接地電極 ５ … 支持絶縁被覆 ６ … 高電圧導体フッ素樹脂被覆 ７ … 金属容器フッ素樹脂被覆 ８ … 支持絶縁物 ９ … 金属異物1 ... SF 6 gas 2 ... metal container 3 ... high voltage conductor 4 ... supporting insulator 4a ... high voltage electrode 4b ... ground electrode 5 ... supporting insulating coating 6 ... high voltage conductor fluororesin coating 7 ... metal container fluorocarbon resin coating 8 ... Supporting insulator 9 ... Metal foreign matter
Claims (1)
された金属容器と、この金属容器内に配置された高電圧
導体と、この高電圧導体を金属容器に対して絶縁支持す
る支持絶縁物と、第２の絶縁媒体を備えた複合絶縁方式
母線において、 前記第２の絶縁媒体が、高電圧導体の外表面及び金属容
器の内表面にそれぞれ設けられたフッ素樹脂被覆であ
り、高電圧導体が、金属容器に対して、金属容器のフッ
素樹脂被覆、支持絶縁物、及び高電圧導体のフッ素樹脂
被覆を介して絶縁支持されたことを特徴とする複合絶縁
方式母線。Claim: What is claimed is: 1. A metal container filled with an insulating gas as a first insulating medium, a high-voltage conductor arranged in the metal container, and the high-voltage conductor with respect to the metal container. In a composite insulation method busbar comprising a support insulator for insulating and supporting by means of a second insulating medium, the second insulating medium is a fluororesin provided on an outer surface of a high-voltage conductor and an inner surface of a metal container, respectively. And a high-voltage conductor, which is insulated and supported on the metal container through the fluororesin coating of the metal container, the supporting insulator, and the fluororesin coating of the high-voltage conductor. ..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3180073A JP3028975B2 (en) | 1991-07-22 | 1991-07-22 | Composite insulation bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3180073A JP3028975B2 (en) | 1991-07-22 | 1991-07-22 | Composite insulation bus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0530626A true JPH0530626A (en) | 1993-02-05 |
| JP3028975B2 JP3028975B2 (en) | 2000-04-04 |
Family
ID=16076990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3180073A Expired - Fee Related JP3028975B2 (en) | 1991-07-22 | 1991-07-22 | Composite insulation bus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3028975B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007274822A (en) * | 2006-03-31 | 2007-10-18 | Toshiba Corp | Gas insulated instrument |
| US7742283B2 (en) | 2005-05-16 | 2010-06-22 | Mitsubishi Denki Kabushiki Kaisha | Gas-insulated equipment |
| WO2014097729A1 (en) | 2012-12-21 | 2014-06-26 | 三菱電機株式会社 | Gas insulated electric equipment |
| CN104937796A (en) * | 2013-01-21 | 2015-09-23 | 三菱电机株式会社 | Gas-insulated switchgear |
| JPWO2016006137A1 (en) * | 2014-07-10 | 2017-06-01 | 三菱電機株式会社 | Gas insulated electrical device and method for manufacturing gas insulated electrical device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6071209B2 (en) | 2012-02-21 | 2017-02-01 | 株式会社東芝 | Gas insulated switchgear and gas insulated bus |
| JP6293474B2 (en) | 2013-01-18 | 2018-03-14 | 株式会社東芝 | Non-linear resistance paint, busbar and stator coil |
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1991
- 1991-07-22 JP JP3180073A patent/JP3028975B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7742283B2 (en) | 2005-05-16 | 2010-06-22 | Mitsubishi Denki Kabushiki Kaisha | Gas-insulated equipment |
| US7848084B2 (en) | 2005-05-16 | 2010-12-07 | Mitsubishi Denki Kabushiki Kaisha | Gas-insulated equipment |
| JP2007274822A (en) * | 2006-03-31 | 2007-10-18 | Toshiba Corp | Gas insulated instrument |
| WO2014097729A1 (en) | 2012-12-21 | 2014-06-26 | 三菱電機株式会社 | Gas insulated electric equipment |
| JP5859142B2 (en) * | 2012-12-21 | 2016-02-10 | 三菱電機株式会社 | Gas insulated electrical equipment |
| US9508507B2 (en) | 2012-12-21 | 2016-11-29 | Mitsubishi Electric Corporation | Gas insulated electrical equipment |
| CN104937796A (en) * | 2013-01-21 | 2015-09-23 | 三菱电机株式会社 | Gas-insulated switchgear |
| JPWO2016006137A1 (en) * | 2014-07-10 | 2017-06-01 | 三菱電機株式会社 | Gas insulated electrical device and method for manufacturing gas insulated electrical device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3028975B2 (en) | 2000-04-04 |
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