JPH0359653B2 - - Google Patents
Info
- Publication number
- JPH0359653B2 JPH0359653B2 JP7096285A JP7096285A JPH0359653B2 JP H0359653 B2 JPH0359653 B2 JP H0359653B2 JP 7096285 A JP7096285 A JP 7096285A JP 7096285 A JP7096285 A JP 7096285A JP H0359653 B2 JPH0359653 B2 JP H0359653B2
- Authority
- JP
- Japan
- Prior art keywords
- insulating spacer
- high voltage
- voltage conductor
- electric field
- conductor
- 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.)
- Expired
Links
- 125000006850 spacer group Chemical group 0.000 claims description 35
- 239000004020 conductor Substances 0.000 claims description 19
- 230000005684 electric field Effects 0.000 description 13
- 238000009413 insulation Methods 0.000 description 11
- 230000006866 deterioration Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000035936 sexual power Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はガス絶縁機器用絶縁スペーサに係り、
特に金属性異物付着時においても絶縁性能低下の
少ない高絶縁耐力をするガス絶縁機器用絶縁スペ
ーサに関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an insulating spacer for gas insulated equipment,
In particular, the present invention relates to an insulating spacer for gas insulated equipment that has high dielectric strength and exhibits little deterioration in insulation performance even when metallic foreign matter adheres to it.
ガス絶縁機器内で用いられる絶縁スペーサにお
いて、金属異物が付着した場合等を考慮したスペ
ーサの形状に関しては、Cigr′e，1987 Session−
August，30−September ７，15−07，「LONG
DURATION TEST ON EPOXY
INSULATORSIN SF0−GAS」（シグレ、1987
会議−８月30日−９月７日、15−07、「SF6ガス
中のエポキシ樹脂絶縁物についての長期試験」）
において論じられている。
Regarding the shape of the insulating spacer used in gas-insulated equipment, considering the case where metal foreign matter adheres, etc., see Cigr'e, 1987 Session-
August, 30-September 7, 15-07, “LONG
DURATION TEST ON EPOXY
INSULATORSIN SF 0 −GAS” (Shigure, 1987
Conference - August 30-September 7, 15-07, "Long-Term Tests on Epoxy Resin Insulators in SF6 Gas")
It is discussed in
このような、従来技術による絶縁スペーサを用
いたガス絶縁母線の一例を、第２図に示してい
る。円筒状の接地タンク１内に、同心状に高電圧
の中心導体２を配置し、この中心導体２を接地タ
ンク１から絶縁支持するために、取付金具４に絶
縁スペーサ３が設けられている。通常、ガス絶縁
機器は内部に異物が混入しないよう十分注意がは
らわれ、製造組立されているが、万一混入し、絶
縁スペーサ３等に付着した場合には思わぬ絶縁低
下を引き起こす場合がある。このため、これら異
物が付着しても大幅な性能低下を生じないよう、
絶縁スペーサ表面に適宜ひだが設けられ、対策が
施されてきた。 An example of a gas insulated bus bar using such a conventional insulating spacer is shown in FIG. A high-voltage center conductor 2 is disposed concentrically within a cylindrical ground tank 1, and an insulating spacer 3 is provided on a mounting bracket 4 to insulate and support the center conductor 2 from the ground tank 1. Normally, gas insulated equipment is manufactured and assembled with sufficient care to prevent foreign matter from getting inside, but if foreign matter should get mixed in and adhere to the insulation spacer 3, etc., it may cause an unexpected deterioration in insulation. . For this reason, we take precautions to ensure that even if these foreign substances adhere, there will be no significant performance deterioration.
As a countermeasure, appropriate pleats have been provided on the surface of the insulating spacer.
しかしながら、ガス絶縁機器の急速な普及に伴
い、高電圧化、縮小化と共に絶縁信頼性の向上が
一段と要求されている。 However, with the rapid spread of gas insulated equipment, there is a demand for higher voltages, smaller sizes, and further improvements in insulation reliability.
通常、ガス絶縁機器は同心円筒構造が基本とな
る。この場合の電界分布は、平行平板間のような
平等電界分布にはならず、不平等な電界分布とな
る。すなわち、第２図に示すように、接地タンク
１の半径をr0、中心導体２の半径をr1とすると、
機器内の任意の点Ｐ（半径ｒの位置）における電
界Ｅは次式で表わされる。 Gas insulated equipment usually has a concentric cylindrical structure. The electric field distribution in this case does not become an equal electric field distribution like that between parallel plates, but an unequal electric field distribution. That is, as shown in Fig. 2, if the radius of the grounded tank 1 is r 0 and the radius of the center conductor 2 is r 1 , then
The electric field E at any point P (position with radius r) within the device is expressed by the following equation.
Ｅ＝Ｖ／rlnr0／r1 ……(1)
ここでlnは自然対数、Ｖは接地タンク１と中心
導体２間に印加される電圧である。 E=V/rlnr 0 /r 1 (1) where ln is the natural logarithm, and V is the voltage applied between the grounded tank 1 and the center conductor 2.
(1)式によれば、Ｐ点が中心導体２に接近すれば
するほど電界Ｅは強くなるわけであり、絶縁スペ
ーサ部も同様のことが言える。 According to equation (1), the closer the point P is to the center conductor 2, the stronger the electric field E becomes, and the same can be said for the insulating spacer portion.
この絶縁スペーサ３の部分における等電位線図
を第３図に示し、各破線は等電位線であり、この
間隔が狭いほど電界Ｅは強くなる。すなわち、従
来構造においては、高電圧中心導体２に比較的接
近した箇所（図中Ｂ，Ｃ点）に電界の強い部分が
存在している。万一、このような部分に異物が付
着した場合には、絶縁耐力が大幅に低下する恐れ
がある。この対策としてはスペーサ全体の電界分
布の均一化をはかり、ひだの効果を十分に発揮さ
せることが重要となる。 An equipotential diagram at this insulating spacer 3 portion is shown in FIG. 3, where each broken line is an equipotential line, and the narrower the interval, the stronger the electric field E becomes. That is, in the conventional structure, a strong electric field exists at a location relatively close to the high voltage central conductor 2 (points B and C in the figure). If foreign matter were to adhere to such a portion, there is a risk that the dielectric strength would be significantly reduced. As a countermeasure to this problem, it is important to make the electric field distribution uniform throughout the spacer and to fully utilize the effect of the pleats.
本発明の目的は、金属異物が付着した場合にお
いても、大幅な絶縁性能低下を引き起こさず、高
耐電圧を有する絶縁信頼性の高い絶縁スペーサを
提供するにある。
An object of the present invention is to provide an insulating spacer that does not cause a significant deterioration in insulation performance even when metal foreign matter is attached, has a high withstand voltage, and has high insulation reliability.
本発明においては、高電圧導体に最も近接した
ひだの形状の変更により、電界分布の均一化を図
れるようにするため、絶縁スペーサは表面に接地
タンクと高電圧導体間を分割するように少なくと
も２枚の略円板状のひだ部を有し、最も高電圧導
体に近いひだ部を半球状に突出させたことを特徴
とするものである。
In the present invention, in order to make the electric field distribution uniform by changing the shape of the fold closest to the high voltage conductor, the insulating spacer has at least two parts on the surface dividing the ground tank and the high voltage conductor. It is characterized by having two approximately disc-shaped folds, with the fold closest to the high-voltage conductor protruding semispherically.
以下、本発明によるガス絶縁機器用絶縁スペー
サを第１図に示す一実施例を用いて説明する。絶
縁スペーサ３は、絶縁支持の主軸となる本体１３
の外側に略円板状を呈したひだ１４ｂ，１４ｃが
取り付けられ、最上部は上面が半球状を呈した厚
ひだ１４ａが取り付けられた構造である。接地タ
ンクあるいは中心導体への取り付けのため、金具
１１，１２が上、下部に埋込まれている。通常、
これらは一体にモールド形成されている。スペー
サの材料としては、絶縁特性あるいは機械的特性
の点から、エポキシ樹脂を主体にしたものが多く
用いられている。このように形成した絶縁スペー
サを、ガス母線へ組み込んだ場合の等電位線図を
第４図に示したもので、従来例と比較すると、最
上部の厚ひだの効果により接地タンク１内の高電
圧中心導体２部近傍の電解が緩和され、全体とし
て電界の均一化がはかれている。なお、若干の電
界集中がひ界間（Ｄ，Ｅ点）で生じるが、ひだに
よるバリヤ効果のため問題にならない。
Hereinafter, an insulating spacer for gas insulated equipment according to the present invention will be explained using an embodiment shown in FIG. The insulating spacer 3 has a main body 13 that is the main axis of insulating support.
It has a structure in which pleats 14b and 14c each having a substantially disk shape are attached to the outer side thereof, and a thick pleat 14a having a hemispherical upper surface is attached to the uppermost part. Metal fittings 11 and 12 are embedded in the upper and lower parts for attachment to a grounded tank or center conductor. usually,
These are integrally molded. As the material for the spacer, materials mainly made of epoxy resin are often used from the viewpoint of insulating properties or mechanical properties. Figure 4 shows an equipotential diagram when the insulating spacer formed in this way is incorporated into the gas bus bar.Comparing with the conventional example, the height inside the grounded tank 1 is reduced due to the effect of the thick folds at the top. The electrolysis near the second part of the voltage center conductor is relaxed, and the electric field is made uniform as a whole. Although some electric field concentration occurs between the folds (points D and E), this does not become a problem due to the barrier effect of the folds.
本実施例によれば、絶縁スペーサ３の沿面の電
界分布の均一化がはかれるため、どの部分に異物
が付着しても同等の性能が確保できる。また、同
一寸法においては絶縁性能の大幅な向上が可能と
なる。一方、従来と同等の性能を確保する上にお
いては、機器寸法の縮小化がはかれる。 According to this embodiment, since the electric field distribution on the creeping surface of the insulating spacer 3 is made uniform, the same performance can be ensured no matter where foreign matter adheres. Furthermore, with the same dimensions, it is possible to significantly improve insulation performance. On the other hand, in order to ensure the same performance as the conventional technology, the size of the equipment can be reduced.
本発明の他の実施例を示す第５図の絶縁スペー
サ３は円板状ひだ１４ｂが１枚だけの低電圧用の
ものである。本図においては、破線で示す従来品
と本発明品とを重ねて図示している。本発明よる
絶縁スペーサは、従来形状における上側円板状ひ
だの上部（図中Ｆ）を肉盛りした形状である。す
なわち、金型を若干変更するのみで、性能の向上
した絶縁スペーサを製作することができる。 An insulating spacer 3 shown in FIG. 5 showing another embodiment of the present invention is for low voltage use and has only one disc-shaped pleat 14b. In this figure, the conventional product and the product of the present invention are shown superimposed on each other, indicated by broken lines. The insulating spacer according to the present invention has a shape in which the upper part (F in the figure) of the upper disc-shaped fold in the conventional shape is built up. That is, an insulating spacer with improved performance can be manufactured by only slightly changing the mold.
本発明の応用例である絶縁スペーサを第６図に
示している。前述したように本発明においては、
絶縁スペーサ３の高電圧部の電界を緩和し、全体
を均一化することにより絶縁性能の向上をはかつ
たわけであるが、上部の沿面形状は比較的滑めら
かな曲面となる。第７図ａに示すように、万一導
電性異物２０が半球状突出部１４ａに付着した場
合には、ひだで抑える場合と異なり曲面に沿つて
放電が進展し易い状況となる。一方、第７図ｂに
示すように突出部１４ａの外形線が複数の直線群
として構成される場合には、屈曲点Ｇで放電進展
が抑制されるため、破壊電圧の向上がはかれる。
この効果を利用し改善をはかつた例が第６図の実
施例である。このような構造を採用することによ
り、絶縁スペーサ３の沿面のいかなる場所に異物
が付着しても、大幅な絶縁性能低下を生じない絶
縁スペーサを得ることができた。 FIG. 6 shows an insulating spacer which is an application example of the present invention. As mentioned above, in the present invention,
The insulation performance is improved by relaxing the electric field in the high voltage part of the insulating spacer 3 and making the whole area uniform, but the creeping shape of the upper part becomes a relatively smooth curved surface. As shown in FIG. 7a, if the conductive foreign matter 20 were to adhere to the hemispherical protrusion 14a, the discharge would be likely to progress along the curved surface, unlike the case where it is suppressed by pleats. On the other hand, when the outline of the protrusion 14a is configured as a group of a plurality of straight lines as shown in FIG. 7b, the progress of discharge at the bending point G is suppressed, so that the breakdown voltage can be improved.
An example of an improvement utilizing this effect is the embodiment shown in FIG. 6. By employing such a structure, it was possible to obtain an insulating spacer that does not cause a significant deterioration in insulation performance even if foreign matter adheres to any part of the creeping surface of the insulating spacer 3.
〔発明の効果〕
本発明によれば、絶縁スペーサのどのような場
所に導電性異物が付着しても、絶縁低下の少ない
高絶縁耐力を有するガス絶縁機器用絶縁スペーサ
が得られるため、絶縁信頼性を向上することがで
きる。また、従来形状の一部を改良することによ
り可能なため経済的にも有利なものである。[Effects of the Invention] According to the present invention, it is possible to obtain an insulating spacer for gas insulated equipment that has high dielectric strength with little insulation deterioration even if conductive foreign matter adheres to any part of the insulating spacer, thereby improving insulation reliability. can improve sexual performance. Moreover, it is economically advantageous because it can be achieved by partially improving the conventional shape.
第１図は本発明のガス絶縁機器用絶縁スペーサ
の一実施例を示す正面図、第２図は従来の絶縁ス
ペーサの使用状態を示す断面図、第３図は第２図
をＡ−Ａ線より見た断面図、第４図は本発明の絶
縁スペーサの使用例を示す断面図、第５図及び第
６図は本発明のガス絶縁機器用絶縁スペーサの他
の実施例を示す部分断面図、第７図ａ及びｂはそ
れぞれ第５図及び第６図の要部詳細図である。
１……接地タンク、２……高電圧中心導体、３
……絶縁スペーサ、１４ａ……厚ひだ突出部、１
４ｂ，１４ｃ……円板状ひだ。
Fig. 1 is a front view showing one embodiment of the insulating spacer for gas insulated equipment of the present invention, Fig. 2 is a sectional view showing the state of use of a conventional insulating spacer, and Fig. 3 is a line taken along the line A-A in Fig. 2. FIG. 4 is a sectional view showing an example of the use of the insulating spacer of the present invention, and FIGS. 5 and 6 are partial sectional views showing other embodiments of the insulating spacer for gas-insulated equipment of the present invention. , FIGS. 7a and 7b are detailed views of the main parts of FIGS. 5 and 6, respectively. 1...Grounding tank, 2...High voltage center conductor, 3
...Insulating spacer, 14a...Thick pleat protrusion, 1
4b, 14c...Disc-shaped folds.
Claims (1)
地タンクより絶縁スペーサにて高電圧導体を絶縁
支持するものにおいて、前記絶縁スペーサはその
表面に接地タンクと高電圧導体間を分割するよう
に少なくとも２枚の略円板状のひだ部を有し、最
も高電圧導体に近い前記円板状ひだ部の高電圧導
体側を略半球状に突出させたことを特徴とするガ
ス絶縁機器用絶縁スペーサ。 ２ 特許請求の範囲第１項において、高電圧導体
に接近した略半球状の突出部の形状は、その外形
線が複数の直線により構成したことを特徴とする
ガス絶縁機器用絶縁スペーサ。[Scope of Claims] 1. A high voltage conductor is arranged in a ground tank, and the high voltage conductor is insulated and supported from the ground tank by an insulating spacer, the insulating spacer having a surface between the ground tank and the high voltage conductor. It is characterized by having at least two approximately disc-shaped folds so as to divide the conductor, and the high voltage conductor side of the disc-shaped folds closest to the high voltage conductor protruding into a substantially hemispherical shape. Insulating spacer for gas insulated equipment. 2. The insulating spacer for gas insulated equipment according to claim 1, wherein the substantially hemispherical protrusion close to the high voltage conductor has an outline formed by a plurality of straight lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7096285A JPS61231820A (en) | 1985-04-05 | 1985-04-05 | Insulating spacer for gas insulated equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7096285A JPS61231820A (en) | 1985-04-05 | 1985-04-05 | Insulating spacer for gas insulated equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61231820A JPS61231820A (en) | 1986-10-16 |
| JPH0359653B2 true JPH0359653B2 (en) | 1991-09-11 |
Family
ID=13446648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7096285A Granted JPS61231820A (en) | 1985-04-05 | 1985-04-05 | Insulating spacer for gas insulated equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61231820A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0687624B2 (en) * | 1986-11-11 | 1994-11-02 | 株式会社日立製作所 | Insulation spacer for gas insulated electrical equipment |
-
1985
- 1985-04-05 JP JP7096285A patent/JPS61231820A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61231820A (en) | 1986-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0359653B2 (en) | ||
| JPH0638689B2 (en) | Gas insulation equipment | |
| JPH0687624B2 (en) | Insulation spacer for gas insulated electrical equipment | |
| JP2000236605A (en) | Gas insulated switchgear and spacer | |
| JPS638686B2 (en) | ||
| JP2530057B2 (en) | Gas insulated transformer | |
| US1166391A (en) | Insulator. | |
| JPH0635300Y2 (en) | Gas bushing for electric power | |
| JP3657890B2 (en) | Gas insulated switchgear | |
| JPH0210725Y2 (en) | ||
| JPH0683524B2 (en) | Gas insulated electrical equipment | |
| JPS594551Y2 (en) | archorn | |
| JPS5924482B2 (en) | butsing | |
| JPH03222621A (en) | Gas-insulated spacer | |
| JPH09149531A (en) | Gas insulated busbar | |
| JPH0686432A (en) | Gas insulated bus | |
| JPS6033695Y2 (en) | gas insulated electrical equipment | |
| JPH0159807B2 (en) | ||
| JP2660025B2 (en) | Cable termination conductor connection device | |
| JPH0229780Y2 (en) | ||
| JPS6013220Y2 (en) | Multi-phase bulk electrical equipment | |
| JPS61117815A (en) | Gas insulated potential transformer | |
| JPS6087611A (en) | Insulating spacer | |
| JPS59220010A (en) | Insulating spacer for electrical equipment | |
| JPS6112325B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |