JPH0518450B2 - - Google Patents
Info
- Publication number
- JPH0518450B2 JPH0518450B2 JP59257923A JP25792384A JPH0518450B2 JP H0518450 B2 JPH0518450 B2 JP H0518450B2 JP 59257923 A JP59257923 A JP 59257923A JP 25792384 A JP25792384 A JP 25792384A JP H0518450 B2 JPH0518450 B2 JP H0518450B2
- Authority
- JP
- Japan
- Prior art keywords
- shield
- coil
- voltage
- curvature
- high voltage
- 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 - Lifetime
Links
- 238000009413 insulation Methods 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 description 8
- 230000005684 electric field Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
Description
【発明の詳細な説明】
［発明の技術分野］
本発明はガス絶縁計器用変圧器に関するもの
で、特にガス絶縁計器用変圧器の高圧コイルの沿
面ストレスを緩和させ、且つ対接地部との電界ス
トレスを緩和する目的で設けられる高圧シールド
の改良に関するものである。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a gas-insulated voltage transformer, and particularly to a gas-insulated voltage transformer that alleviates the creeping stress of a high-voltage coil and reduces the electric field with the grounding part. This invention relates to improvements in high-voltage shields provided for the purpose of alleviating stress.
［発明の技術的背景とその問題点］
第５図及び第６図に示すように従来のガス絶縁
計器用変圧器１は閉磁路に形成された環状の鉄心
２にこれと鎖交するように内側から低圧コイル
３、および高圧コイル４を同軸的に巻装し、高圧
コイル４の外周上には、電界緩和を目的として両
端を１又は２種の曲率半径で270゜丸めた円筒状の
高圧シールド５を設けている。更にこの高圧シー
ルド５と対向する鉄心２を覆うように接地シール
ド６を配置している。このように高圧と接地間の
電界を制御したこれらの変圧要素をベース７にボ
ルト等によつて機械的に固定し、そしてこの変圧
要素を囲うようにタンク８、カバー９、絶縁スペ
ーサ１０をガスケツト等を介して外気と気密にな
るように組立てている。[Technical background of the invention and its problems] As shown in FIGS. 5 and 6, the conventional gas-insulated instrument transformer 1 has an annular iron core 2 formed in a closed magnetic circuit so as to be interlinked with the annular iron core 2. A low-voltage coil 3 and a high-voltage coil 4 are coaxially wound from the inside, and on the outer periphery of the high-voltage coil 4 is a cylindrical high-voltage coil with both ends rounded by 270 degrees with one or two types of radius of curvature for the purpose of mitigating the electric field. A shield 5 is provided. Further, a grounding shield 6 is arranged to cover the iron core 2 facing the high voltage shield 5. These transformer elements, which have controlled the electric field between the high voltage and the ground, are mechanically fixed to the base 7 with bolts, etc., and a tank 8, a cover 9, and an insulating spacer 10 are placed with a gasket to surround the transformer elements. It is assembled so that it is airtight with the outside air through the
高圧コイル４の一端は、絶縁スペーサ１０に固
定されたシールドガイド１１の内部を通して絶縁
スペーサ１０に気密に取付られた高圧端子１２に
リード線で接続され、外部に引出されている。 One end of the high voltage coil 4 is connected to a high voltage terminal 12 airtightly attached to the insulating spacer 10 through a lead wire through the inside of a shield guide 11 fixed to the insulating spacer 10, and is drawn out to the outside.
一方、高圧コイル４の他端はタンク８に設けた
口出ブツシング（図示せず）を経て、外部に引出
され接地されている。また図示しないが低圧コイ
ル３の口出しリード線はタンク８の側壁に設けた
低圧端子板１３に電気的に接続されて外部に引出
されている。 On the other hand, the other end of the high voltage coil 4 is pulled out to the outside through an outlet bushing (not shown) provided on the tank 8 and is grounded. Although not shown, the lead wire of the low-voltage coil 3 is electrically connected to a low-voltage terminal plate 13 provided on the side wall of the tank 8 and drawn out to the outside.
タンク８、カバー９から成る容器の内部には六
弗化硫黄（SF6）ガスのような電気絶縁性に富ん
だ絶縁ガス１４を封入し、ガス絶縁計器用変圧器
１を構成している。 A gas insulated instrument transformer 1 is constructed by sealing an insulating gas 14 with high electrical insulation properties, such as sulfur hexafluoride (SF 6 ) gas, inside a container consisting of a tank 8 and a cover 9 .
高圧シールド５は高圧コイル４の沿面ストレス
を緩和させるためおよび対接地部との電界ストレ
スを緩和する目的で、取付けられており接地シー
ルド６、タンク８と対向し、高ストレス部となる
両端は、接地シールド６との絶縁距離ａおよび
ｂ、それとタンク８との絶縁距離ｃにより決まる
曲率半径で外方向に丸められている。 The high-voltage shield 5 is installed for the purpose of alleviating the creeping stress of the high-voltage coil 4 and the electric field stress with respect to the grounding part.The high-voltage shield 5 faces the grounding shield 6 and the tank 8. It is rounded outward with a radius of curvature determined by the insulation distances a and b from the ground shield 6 and the insulation distance c from the tank 8.
この曲率半径は、絶縁距離ａ，ｂ，ｃが短くな
る程大きくする必要がある。また、高圧シールド
５を高圧コイル４に装着する場合は、高圧コイル
４との間のガスギヤツプをできる限り０に近づけ
て、ガスギヤツプ部に電気的ストレスの集中を防
止することと、振動等の外力により高圧シールド
５が振動したりずれたりするのを防止するため堅
固に高圧コイル４に装着することが必要である。 This radius of curvature needs to be increased as the insulation distances a, b, and c become shorter. In addition, when attaching the high voltage shield 5 to the high voltage coil 4, the gas gap between the high voltage coil 4 and the high voltage coil 4 should be kept as close to 0 as possible to prevent electrical stress from concentrating on the gas gap, and to prevent external forces such as vibrations from concentrating on the gas gap. In order to prevent the high voltage shield 5 from vibrating or shifting, it is necessary to firmly attach it to the high voltage coil 4.
高圧シールド５を高圧コイル４に堅固に装着す
る手段として、従来は第７図に示す如く、円筒状
の高圧シールド５を半径方向に２分割し、比較的
電気的ストレスの低い中央部に座１５を固着して
高圧コイル４の外周に添えた後、座１５にボルト
等の締結部品を通して堅固に高圧コイル４に装着
していた。 Conventionally, as a means of firmly attaching the high voltage shield 5 to the high voltage coil 4, as shown in FIG. After fixing and attaching it to the outer periphery of the high voltage coil 4, fastening parts such as bolts were passed through the seat 15 and firmly attached to the high voltage coil 4.
一方、近年、特に機器の小形化、縮小化、軽量
化が要求されており、これらの要求に対応するた
めガス絶縁計器用変圧器では高圧コイル４の縮小
化や高圧シールド５の両端の曲率半径を大きくし
て、接地シールド６、タンク８との絶縁距離ａ，
ｂ，ｃを短縮することが不可欠である。しかしな
がら、従来の高圧シールド５の構成では、両端の
曲率半径を大きくすれば、装着用の座１５を小さ
くしなくてはならず、高圧シールド５を高圧コイ
ル４に堅固に装着することができなくなつたり、
反対に座１５を必要な大きさにすると高圧シール
ド５の幅ｌが大きくあなガス絶縁計器用変圧器１
の小形化、軽量化を阻害する等の問題があつた。 On the other hand, in recent years, there has been a demand for smaller, smaller, and lighter equipment, and in order to meet these demands, in gas-insulated instrument transformers, the high-voltage coil 4 has been reduced in size and the radius of curvature at both ends of the high-voltage shield 5 has been reduced. by increasing the insulation distance a from the grounding shield 6 and tank 8,
It is essential to shorten b and c. However, in the conventional configuration of the high-voltage shield 5, if the radius of curvature at both ends is increased, the mounting seat 15 must be made smaller, making it impossible to securely attach the high-voltage shield 5 to the high-voltage coil 4. Summer,
On the other hand, if the seat 15 is made to the required size, the width l of the high voltage shield 5 becomes large.
There were problems such as hindering miniaturization and weight reduction.
［発明の目的］
本発明は上記のような問題点に鑑みてなされた
もので、その目的とするところは高圧シールドを
高圧コイルに堅固に装着でき、しかも高圧シール
ドは変圧要素が挿入できる円形断面のタンク径か
ら決まる絶縁距離に対応する必要な曲率半径で構
成することができ、信頼性が高く、より小形化、
軽量化したガス絶縁計器用変圧器を提供すること
にある。[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and its purpose is to enable a high voltage shield to be securely attached to a high voltage coil, and to provide a high voltage shield with a circular cross section into which a transformer element can be inserted. It can be configured with the necessary radius of curvature that corresponds to the insulation distance determined by the tank diameter, making it highly reliable, more compact, and
An object of the present invention is to provide a lightweight gas-insulated instrument transformer.
［発明の概要］
本発明は、以上の目的を達成するため、高圧シ
ールドの断面形状を沿面ストレスの強さに応じて
決まる曲率半径r1部分と、接地シールドとの絶縁
距離から決まる曲率半径r2部分と、タンクとの絶
縁距離から決まる曲率半径r3部分の３種類の異な
る曲率半径より形成し、かつコイルの半径方向お
よび円周方向にそれぞれ２分割した袋状に形成し
たことを特徴とするものである。[Summary of the Invention] In order to achieve the above object, the present invention has a cross-sectional shape of a high-voltage shield with a radius of curvature r1 determined depending on the strength of creeping stress and a radius of curvature r determined based on the insulation distance from the ground shield. It is characterized by being formed with three different radii of curvature: 2 parts and 3 parts with a radius of curvature r determined by the insulation distance from the tank, and it is formed into a bag shape that is divided into two parts in the radial direction and circumferential direction of the coil. It is something to do.
［発明の実施例］
以下、本発明の実施例について図面を参照して
説明する。[Embodiments of the Invention] Examples of the present invention will be described below with reference to the drawings.
第１図及び第２図において高圧シールド１０１
の断面形状は、高圧コイル４の沿面ストレスの強
さに応じて決まる曲率半径部分r1と、接地シール
ド６との絶縁距離ａから決る曲率半径r2部分と、
タンク８との絶縁距離ｃから決まる曲率半径r3部
分の最低３種類の曲率半径を有する袋状の断面形
状を有し半径方向で２分割し、更に曲率半径r2と
r3部分の接点で外周面を分割して合計４ケの部分
に分割されている。 In FIGS. 1 and 2, the high voltage shield 101
The cross-sectional shape of the high-voltage coil 4 has a radius of curvature r1 determined according to the strength of the creeping stress of the coil 4, a radius of curvature r2 determined based on the insulation distance a from the ground shield 6,
It has a bag-like cross-sectional shape with at least three different radii of curvature determined by the insulation distance c from the tank 8, and is further divided into two parts with a radius of curvature r2.
r The outer peripheral surface is divided at the contact points of the 3 parts, resulting in a total of 4 parts.
４ケの分割された部分のうち内周側の部分１０
１ａ，１０１ｂの径方向４個所の切断面には、高
圧シールド１０１の固定用の座１０２を夫々固着
している。固定用座１０２は高圧シールド１０１
を高圧コイル４の外周に添せた後ボルト等の締結
部品を用いて高圧コイルに堅固に固定するための
ものである。 Inner circumference side part 10 of the 4 divided parts
Seats 102 for fixing the high-pressure shield 101 are fixed to four cut surfaces in the radial direction of 1a and 101b, respectively. The fixing seat 102 is a high pressure shield 101
After being attached to the outer periphery of the high-voltage coil 4, it is firmly fixed to the high-voltage coil using fastening parts such as bolts.
又、高圧シールド１０１の内周側部分１０１
ａ，１０１ｂは外周面側にめねじを設けたボス１
０３を各々に２ケ以上設けている。一方、高圧シ
ールド１０１の外周部分１０１ｃ，１０１ｄはボ
ス１０３のめねじに合う位置に穴１０４を設けて
おり外周部分１０１ｃ，１０１ｄを内周部分１０
１ａ，１０１ｂに第３図のように皿頭ネジ１０５
のように、高圧シールド１０１の表面に有害な突
起物が生じない締結部品を用いて固定するもので
ある。 In addition, the inner peripheral side portion 101 of the high voltage shield 101
a, 101b are bosses 1 with female threads on the outer circumference side
Two or more 03 are provided for each. On the other hand, the outer peripheral parts 101c and 101d of the high voltage shield 101 are provided with holes 104 at positions that match the internal threads of the boss 103, and the outer peripheral parts 101c and 101d are connected to the inner peripheral part 101.
1a and 101b as shown in FIG.
The high-voltage shield 101 is fixed using a fastening component that does not produce harmful protrusions on the surface.
なお、上記の実施例では、高圧シールド１０１
の曲率半径r2，r3部分の接点に外周切断面を設け
ているが、第４図の如く、曲率半径の種類を更に
増して、固定用座１０２の幅Ｌ以上の寸法であれ
ば、どこに切断面を設けても機能上何ら影響なく
同じ目的を達成できることは言うまでもない。ま
た、外周切断面は、内周部分１０１ａ，１０１ｂ
と外周部分１０１ｃ，１０１ｄが寸法通りに製作
できなければ、電界を乱し、ストレスが集中する
ことがある。このストレス集中を防止するため外
周切断面に小曲率半径r0部分を設けることによつ
て更に信頼性を向上できることは言うまでもな
い。 Note that in the above embodiment, the high voltage shield 101
An outer circumferential cut surface is provided at the contact point of the curvature radius r 2 and r 3 of , but as shown in FIG. It goes without saying that the same purpose can be achieved no matter where the cut surface is provided without any functional effect. In addition, the outer circumferential cut surface is the inner circumferential portion 101a, 101b.
If the outer peripheral portions 101c and 101d cannot be manufactured to the exact dimensions, the electric field may be disturbed and stress may be concentrated. It goes without saying that reliability can be further improved by providing a small radius of curvature r 0 portion on the outer circumferential cut surface in order to prevent this stress concentration.
［発明の効果］
以上のように本発明によれば、高圧シールドの
断面形状がコイルの半径方向および円周方向にそ
れぞれ２分割した袋状であり、沿面ストレスの強
さに応じて決まる曲率半径r1部分と、接地シール
ドとの絶縁距離から決まる曲率半径r2部分と、タ
ンクとの絶縁距離から決まる曲率半径r3部分の３
種類の異なる曲率半径より構成されているので、
最小限の大きさで、かつ十分に電界緩和効果を上
げることができ、もつて高圧シールドが小形化さ
れるばかりでなく、絶縁距離も最適値まで短縮す
ることができるため、より縮小化、軽量化したガ
ス絶縁開閉器用変圧器を提供することができる。[Effects of the Invention] As described above, according to the present invention, the cross-sectional shape of the high-voltage shield is a bag-like shape divided into two in the radial direction and the circumferential direction of the coil, and the radius of curvature is determined depending on the strength of creeping stress. The r1 part, the curvature radius r2 part determined by the insulation distance from the ground shield, and the curvature radius r3 part determined by the insulation distance from the tank.
Since it is composed of different types of curvature radii,
It is possible to sufficiently increase the electric field mitigation effect with the minimum size, which not only makes the high voltage shield smaller, but also shortens the insulation distance to the optimum value, making it even smaller and lighter. It is possible to provide a gas-insulated switchgear transformer that is
第１図は本発明における高圧シールドの分解斜
視図、第２図はその半径方向切断面図、第３図は
第１図のＸ−Ｘ−Ｘ−Ｘ線に沿つた断面図、第４
図は本発明の他の実施例を示す断面図、第５図は
従来のガス絶縁計器用変圧器の正面断面図、第６
図はその平面断面図、第７図は従来の高圧シール
ドの斜視図である。
１……ガス絶縁計器用変圧器、２……鉄心、３
……低圧コイル、４……高圧コイル、５……高圧
シールド、６……接地シールド、８……タンク、
９……カバー、１４……絶縁ガス、１５……座、
ａ，ｂ，ｃ……絶縁距離、１０１……高圧シール
ド、１０１ａ，１０１ｂ……高圧シールド内周側
部品、１０１ｃ，１０１ｄ……高圧シールド外周
側部品、１０２……固定用座、１０５……皿頭ネ
ジ、r1，r2，r3，r3……高圧シールドの曲率半径。
FIG. 1 is an exploded perspective view of the high-voltage shield according to the present invention, FIG. 2 is a radial cross-sectional view thereof, FIG. 3 is a cross-sectional view taken along the line X-X-X-X in FIG. 1, and FIG.
The figures are a cross-sectional view showing another embodiment of the present invention, FIG. 5 is a front cross-sectional view of a conventional gas-insulated voltage transformer, and FIG.
The figure is a plan sectional view thereof, and FIG. 7 is a perspective view of a conventional high voltage shield. 1...Gas insulated instrument transformer, 2...Iron core, 3
...Low voltage coil, 4...High voltage coil, 5...High voltage shield, 6...Grounding shield, 8...Tank,
9...Cover, 14...Insulating gas, 15...Seat,
a, b, c... Insulation distance, 101... High voltage shield, 101a, 101b... High voltage shield inner peripheral part, 101c, 101d... High voltage shield outer peripheral part, 102... Fixing seat, 105... Dish Head screw, r 1 , r 2 , r 3 , r 3 ... radius of curvature of high pressure shield.
Claims (1)
コイルおよび高圧コイルと、高圧コイルの外周に
設けられ円筒形の高圧シールドと、前記鉄心、コ
イル、高圧シールドを絶縁ガスと共に密閉収納す
るタンクとから成るガス絶縁計器用変圧器におい
て、前記高圧シールドの断面形状を沿面ストレス
の強さに応じて決まる曲率半径r1部分と、接地シ
ールドとの絶縁距離から決まる曲率半径r2部分
と、タンクとの絶縁距離から決まる曲率半径r3部
分の３種類の異なる曲率半径より形成し、かつコ
イルの半径方向および円周方向にそれぞれ２分割
した袋状に形成したことを特徴とするガス絶縁計
器用変圧器。1. An iron core, a low-voltage coil and a high-voltage coil coaxially wound around the iron core, a cylindrical high-voltage shield provided around the outer periphery of the high-voltage coil, and a tank that hermetically stores the iron core, coil, and high-voltage shield together with an insulating gas. In a gas-insulated instrument transformer, the cross-sectional shape of the high-voltage shield is divided into a curvature radius r 1 part determined according to the strength of creeping stress, a curvature radius r 2 part determined by the insulation distance from the ground shield, and a tank. For gas insulated instruments, the curvature radius r is determined by the insulation distance between the coil and the coil. transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59257923A JPS61135107A (en) | 1984-12-06 | 1984-12-06 | Gas insulated transformer for instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59257923A JPS61135107A (en) | 1984-12-06 | 1984-12-06 | Gas insulated transformer for instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61135107A JPS61135107A (en) | 1986-06-23 |
| JPH0518450B2 true JPH0518450B2 (en) | 1993-03-12 |
Family
ID=17313065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59257923A Granted JPS61135107A (en) | 1984-12-06 | 1984-12-06 | Gas insulated transformer for instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61135107A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180095456A (en) * | 2017-02-17 | 2018-08-27 | 한온시스템 주식회사 | Compressor |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2736686B2 (en) * | 1989-07-28 | 1998-04-02 | 東光電気株式会社 | Mounting method and mounting structure of high voltage shield of transformer |
| JPH04186472A (en) * | 1990-11-21 | 1992-07-03 | Mitsubishi Heavy Ind Ltd | Cargo work managing device |
| CN103107011B (en) * | 2011-11-15 | 2015-12-02 | 华北电力科学研究院有限责任公司 | For the Electric Field Distribution pressure-equalizing device of voltage transformer |
| CN104569898A (en) * | 2015-01-04 | 2015-04-29 | 国家电网公司 | Fixing and voltage sharing device for vehicle-mounted standard voltage transformer used for verifying transformer of 500 kV |
| CN104851573A (en) * | 2015-05-11 | 2015-08-19 | 国家电网公司 | Vehicle-mounted transformer coil fixing and pressure equalizing device for 500kV mutual inductor calibration |
| CN110620000B (en) * | 2019-07-08 | 2021-02-23 | 河南平高电气股份有限公司 | Voltage transformer and shielding case thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5689235U (en) * | 1979-12-10 | 1981-07-16 | ||
| JPS58122422U (en) * | 1982-02-12 | 1983-08-20 | 日新電機株式会社 | Multi-stage wire ring for high voltage |
-
1984
- 1984-12-06 JP JP59257923A patent/JPS61135107A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180095456A (en) * | 2017-02-17 | 2018-08-27 | 한온시스템 주식회사 | Compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61135107A (en) | 1986-06-23 |
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