JPH06283062A - Bushing shield device - Google Patents

Bushing shield device

Info

Publication number
JPH06283062A
JPH06283062A JP6722493A JP6722493A JPH06283062A JP H06283062 A JPH06283062 A JP H06283062A JP 6722493 A JP6722493 A JP 6722493A JP 6722493 A JP6722493 A JP 6722493A JP H06283062 A JPH06283062 A JP H06283062A
Authority
JP
Japan
Prior art keywords
bushing
electrostatic shield
shield
electrostatic
electric field
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
Application number
JP6722493A
Other languages
Japanese (ja)
Other versions
JP3372984B2 (en
Inventor
Jiro Nakatani
次郎 中谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP6722493A priority Critical patent/JP3372984B2/en
Publication of JPH06283062A publication Critical patent/JPH06283062A/en
Application granted granted Critical
Publication of JP3372984B2 publication Critical patent/JP3372984B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/02Casings
    • H01F27/04Leading of conductors or axles through casings, e.g. for tap-changing arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Insulators (AREA)

Abstract

PURPOSE:To provide a bushing shield device having insulation structure having a little end part electric field concentration though, electrostatic shields are small in outside diameter dimension, and having small number of outside insulating barriers of the electrostatic shields. CONSTITUTION:Connecting lead wires 51, 52 from the winding of a unit transformer are connected in T shape to a bushing conductor 10 at the lower end of a bushing 2. An upper electrostatic shield 6, a lower electrostatic shield 7, and a ring-like electrostatic shield 12 are mounted to electrically protect the connecting part and the lower part of the bushing 2. Electric field concentration at the lower part end is higher than that of the upper electrostatic shield 6. Thus, curvature at the end formed by a combination of the lower electrostatic shield 7 and the ring-like electrostatic shield 12 is increased compared to the upper electrostatic shield 6. The aperture of the ring-like electrostatic shield 12 is reduced to the dimension for allowing checking work for the connection state of the bushing 2 to the connecting lead wires 51, 52.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は変圧器、リアクトル等の
静止誘導器のブッシングシールド装置に係り、特に分割
された複数の静止誘導器における各巻線間の接続リード
線とブッシングとの接続部用のブッシングシールド装置
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bushing shield device for a static inductor such as a transformer or a reactor, and more particularly to a connecting portion between a connecting lead wire and a bushing between a plurality of divided static inductors. Bushing shield device.

【0002】[0002]

【従来の技術】近年、変圧器は大容量、大型化の傾向に
あり、例えば500kV級送電に使用される変圧器は単
器容量が一相当たり1500/3MVA〜2000/3
MVAにもなり、輸送上の寸法の制約から単相器を2〜
3分割した単位変圧器が採用されている。また、次期送
電電圧として計画されている1000kV級の送電用変
圧器においては、単器容量が一相当たり3000/3M
VA以上にもなるので、この場合も単相器を2〜3分割
した単相変圧器からなる構造となる。
2. Description of the Related Art In recent years, transformers tend to have large capacities and large sizes. For example, transformers used for 500 kV class power transmission have a unit capacity of 1500/3 MVA to 2000/3 per phase.
It also becomes an MVA, and the single-phase device is 2
A unit transformer divided into three parts is used. In the 1000 kV class power transmission transformer planned as the next transmission voltage, the unit capacity is 3000 / 3M per phase.
Since it is more than VA, in this case as well, the structure is composed of a single-phase transformer in which the single-phase device is divided into 2 to 3.

【0003】このような単位変圧器の巻線からのリード
線と、各単位変圧器の中間に配設されるブッシングの端
子との接続部には、電界緩和用として表面を絶縁被覆し
た静電シールドが取り付けられているが、電圧が高い場
合には、この静電シールドの外側を多重の絶縁バーリア
で覆っている。
A connecting portion between the lead wire from the winding of the unit transformer and the terminal of the bushing arranged in the middle of each unit transformer has an electrostatically coated surface for the purpose of mitigating an electric field. A shield is attached, but when the voltage is high, the outside of this electrostatic shield is covered with multiple insulating barriers.

【0004】例えば、特公昭63−42841号公報記
載のブッシングシールド装置は図2に示すように、端部
に曲率を持たせた内径寸法、外径寸法とも変わらない円
筒状の静電シールドの表面に絶縁被覆を施した構造を採
用している。すなわち、この従来のブッシングシールド
装置において、ブッシング2を収納したブッシングポケ
ット3は接続ダクト4を介して単位変圧器1,1と接続
されている。また、単位変圧器1,1の巻線(図示せ
ず)からの接続シード線51,52は、ブッシング2の
下端においてブッシング導体10とT字状に接続されて
いる。この接続部とブッシング2の下部を電気的に保護
するため、上部静電シールド6および下部静電シールド
7が取付けられている。これらの静電シールド6,7の
外側には、絶縁バーリア8が設けられている。なお、9
はリード絶縁バーリア、11はブッシング金具である。
For example, as shown in FIG. 2, the bushing shield device disclosed in Japanese Patent Publication No. 63-42841 has a cylindrical electrostatic shield surface whose end portion has a curvature and whose inner and outer dimensions do not change. A structure with an insulating coating is used. That is, in this conventional bushing shield device, the bushing pocket 3 accommodating the bushing 2 is connected to the unit transformers 1, 1 through the connection duct 4. Further, the connection seed wires 51 and 52 from the windings (not shown) of the unit transformers 1 and 1 are connected to the bushing conductor 10 in a T shape at the lower end of the bushing 2. An upper electrostatic shield 6 and a lower electrostatic shield 7 are attached in order to electrically protect the connecting portion and the lower portion of the bushing 2. An insulating barrier 8 is provided outside the electrostatic shields 6 and 7. 9
Is a lead insulating barrier, and 11 is a bushing fitting.

【0005】[0005]

【発明が解決しようとする課題】このような構造の静電
シールド6,7を使用した従来技術では、静電シールド
の外径の大きさに比べて静電シールドの端部曲率が小さ
いため、ブッシング2と反対側の静電シールド6,7の
端部には電界が大きく集中する。従って、必然的に静電
シールド6,7の表面のシールド絶縁被覆厚を増大する
とか、また静電シールド外側の絶縁バーリア8の枚数を
増大するなどの必要性が生じ、絶縁構造の複雑化が生じ
る。
In the prior art using the electrostatic shields 6 and 7 having such a structure, since the end curvature of the electrostatic shield is smaller than the outer diameter of the electrostatic shield, The electric field is largely concentrated at the ends of the electrostatic shields 6 and 7 on the side opposite to the bushing 2. Therefore, it is necessary to inevitably increase the thickness of the shield insulating coating on the surface of the electrostatic shields 6 and 7, or increase the number of insulating barriers 8 outside the electrostatic shields, which complicates the insulating structure. Occurs.

【0006】また、この端部の曲率を大きくして静電シ
ールド端部の電界強度を下げることも考えられるが、そ
の場合には静電シールドの外径寸法を非常に大きくする
必要がある。その結果、静電シールド6,7とブッシン
グポケット3間の電界強度が大きくなるため、ブッシン
グポケット径の拡大、あるいは静電シールドの外側の絶
縁バーリア8の枚数増大による絶縁構造の複雑化が生じ
る。
It is also conceivable to increase the curvature of this end portion to reduce the electric field strength at the end portion of the electrostatic shield, but in that case, the outer diameter dimension of the electrostatic shield must be made very large. As a result, the electric field strength between the electrostatic shields 6 and 7 and the bushing pocket 3 increases, so that the diameter of the bushing pocket increases or the number of insulating barriers 8 outside the electrostatic shield increases, which complicates the insulating structure.

【0007】本発明は、上記問題点に鑑みてなされたも
ので、その目的は、静電シールドの外径寸法が小さいに
もかかわらず端部電界集中が小さく、かつ静電シールド
の外側の絶縁バーリア枚数の少ない絶縁構造のブッシン
グシールド装置を提供することにある。
The present invention has been made in view of the above problems. An object of the present invention is to reduce the concentration of electric field at the end portion even though the outer diameter of the electrostatic shield is small and to insulate the outside of the electrostatic shield. An object of the present invention is to provide a bushing shield device having an insulating structure with a small number of barriers.

【0008】[0008]

【課題を解決するための手段】本発明は上記目的を達成
するために、単相静止誘導器を少なくとも2台に分割し
た単位静止誘導器相互間を、絶縁被覆を施したリード線
を内蔵したダクトにより連結し、前記リード線により前
記単位静止誘導器の巻線と前記ダクトの中間部に設置し
たブッシングとを電気的に接続し、この接続部の周囲に
電界緩和用の静電シールドを設けたブッシングシールド
装置において、前記静電シールドを前記リード線に対し
てブッシング側とブッシングとは反対側の2つに分割
し、ブッシングとは反対側の前記静電シールド端部の内
周部にリング状静電シールドを配置し、前記リング状静
電シールドの口径を、前記静電シールドにおける前記リ
ード線に対向する側の端部の口径よりも小さくしたこと
を特徴とするものである。
In order to achieve the above object, the present invention incorporates a lead wire having an insulating coating between unit static inductors in which at least two single-phase static inductors are divided. Connected by a duct, the lead wire electrically connects the winding of the unit static inductor and a bushing installed in the middle of the duct, and an electrostatic shield for mitigating an electric field is provided around the connection. In the bushing shield device, the electrostatic shield is divided into two parts, a bushing side and a side opposite to the bushing with respect to the lead wire, and a ring is provided on an inner peripheral portion of the end portion of the electrostatic shield opposite to the bushing. -Shaped electrostatic shield is arranged, and the diameter of the ring-shaped electrostatic shield is smaller than the diameter of the end portion of the electrostatic shield on the side facing the lead wire. That.

【0009】[0009]

【作用】上記したような構成を有する本発明において
は、リング状静電シールドの存在により、ブッシングの
ない側の静電シールド端部の見かけの曲率を大きくする
ことができ、また、端部の口径の大きさに対する端部曲
率の大きさを大きくすることができることから、静電シ
ールドの外径寸法を大きくすることなく、静電シールド
端部における電界集中を大幅に緩和できる。
In the present invention having the above-described structure, the presence of the ring-shaped electrostatic shield makes it possible to increase the apparent curvature of the end of the electrostatic shield on the side without the bushing. Since the size of the end curvature with respect to the size of the aperture can be increased, the electric field concentration at the end of the electrostatic shield can be significantly reduced without increasing the outer diameter of the electrostatic shield.

【0010】[0010]

【実施例】以下、本発明の一実施例を図1を参照して説
明する。図1は本発明の一実施例の断面図である。同図
に示すように、分割された単位変圧器の巻線(図示せ
ず)からの接続リード線51,52は、ブッシング2の
下端においてブッシング導体10とT字状に接続されて
いる。この接続部とブッシング2の下部を電気的に保護
するため、上部静電シールド6,下部静電シールド7お
よびリング状静電シールド12が取付けられている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a sectional view of an embodiment of the present invention. As shown in the figure, the connection lead wires 51 and 52 from the divided windings (not shown) of the unit transformer are connected to the bushing conductor 10 in a T-shape at the lower end of the bushing 2. An upper electrostatic shield 6, a lower electrostatic shield 7, and a ring-shaped electrostatic shield 12 are attached in order to electrically protect the connecting portion and the lower portion of the bushing 2.

【0011】この静電シールド6と7は一体としたほう
が静電シールドとしては機能上好ましいが、静電シール
ド6と7の表面には、電界強度の低減、絶縁破壊強度の
向上を図るためシールド絶縁被覆を設ける必要があり、
接続リード線51,52貫通用の穴部表面に絶縁物を被
覆することは困難であるので、本実施例では、静電シー
ルドは上部静電シールド6と下部静電シールド7に2分
割され、それぞれの表面にシールド絶縁被覆6a,7a
が設けられている。
It is preferable that the electrostatic shields 6 and 7 are integrated in terms of function as an electrostatic shield. However, the electrostatic shields 6 and 7 are shielded on the surface thereof in order to reduce the electric field strength and the dielectric breakdown strength. It is necessary to provide an insulating coating,
Since it is difficult to coat the surface of the hole for penetrating the connecting lead wires 51, 52 with an insulator, in this embodiment, the electrostatic shield is divided into an upper electrostatic shield 6 and a lower electrostatic shield 7. Shield insulation coating 6a, 7a on each surface
Is provided.

【0012】静電シールド6と7の電位と接続リード線
51,52の導体電位は同電位であることから、静電シ
ールド6と7の接続リード線51,52に対向する側の
端部の電界強度は小さい。他方、上部静電シールド6に
は、このシールドと同電位のブッシング導体10が貫通
するが、静電シールド6とブッシング導体10が大きく
離れているため、静電シールド6の上部側端部には電界
が大きく集中する。さらに、下部静電シールド7の下部
端部は空間的に大きく開口していることから、この静電
シールド7の下部端部には上部静電シールド6の上部端
部よりも大きく、電界が集中する。
Since the potentials of the electrostatic shields 6 and 7 and the conductor potentials of the connecting lead wires 51 and 52 are the same, the end portions of the electrostatic shields 6 and 7 on the side facing the connecting lead wires 51 and 52 are the same. The electric field strength is small. On the other hand, the bushing conductor 10 having the same potential as this shield penetrates through the upper electrostatic shield 6, but since the electrostatic shield 6 and the bushing conductor 10 are widely separated from each other, the upper side end portion of the electrostatic shield 6 is The electric field is largely concentrated. Further, since the lower end portion of the lower electrostatic shield 7 has a large spatial opening, the lower end portion of the electrostatic shield 7 is larger than the upper end portion of the upper electrostatic shield 6 and the electric field is concentrated. To do.

【0013】従って、本実施例においては、静電シール
ド6と7の各端部の形状を工夫することによってこの端
部の電界集中を緩和している。すなわち、上部静電シー
ルド6においては、ブッシング2が貫通する側の端部の
曲率を上側にいくほど小さくなるように、複数回変えな
がら内側に絞り込んで形成されている。この端部の口径
の大きさは、この静電シールドがブッシング金具11に
挿入できるように、ブッシング金具11の外径寸法より
若干大きくなっている。
Therefore, in this embodiment, the electric field concentration at the ends of the electrostatic shields 6 and 7 is alleviated by devising the shape of each end. That is, in the upper electrostatic shield 6, the curvature of the end portion on the side through which the bushing 2 penetrates is narrowed inward while being changed a plurality of times so as to become smaller toward the upper side. The diameter of the end portion is slightly larger than the outer diameter of the bushing fitting 11 so that the electrostatic shield can be inserted into the bushing fitting 11.

【0014】一方、下部静電シールド7においては、下
部端部での電界集中が上部静電シールド6の場合よりも
大きいことから、下部静電シールド7の下部端部内周に
リング状静電シールド12を配置して下部静電シールド
7とリング状静電シールド12の組み合わせによる端部
曲率を、上部静電シールド6の場合よりも大きくしてい
る。また、リング状静電シールド12の口径はブッシン
グ2と接続リード線51,52との接続状態のチェック
やこの下部静電シールド7のブッシング下端部への取付
作業が可能な程度の大きさまで小さくなっている。
On the other hand, in the lower electrostatic shield 7, the electric field concentration at the lower end portion is larger than that in the upper electrostatic shield 6, so that the ring-shaped electrostatic shield is formed on the inner periphery of the lower end portion of the lower electrostatic shield 7. 12 is arranged to make the end curvature due to the combination of the lower electrostatic shield 7 and the ring-shaped electrostatic shield 12 larger than that of the upper electrostatic shield 6. Further, the diameter of the ring-shaped electrostatic shield 12 is reduced to such a size that it is possible to check the connection state between the bushing 2 and the connecting lead wires 51 and 52 and to attach the lower electrostatic shield 7 to the lower end portion of the bushing. ing.

【0015】本実施例は上記したような構造であるの
で、静電シールド6,7の接続リード線51,52に対
向しない外側の端部の電界強度は大幅に低減するので、
静電シールド表面に施すシールド絶縁の厚さも小さくす
ることができる。従って、静電シールドとシールド絶縁
から構成されるブッシングシールドの製作が容易にな
る。また、シールド絶縁表面の電界強度が大幅に低減さ
れるため、静電シールドの外側に設ける絶縁バーリア8
の必要枚数を少なくすることができる。特に、この絶縁
バーリア8は所定のギャップ寸法を保持しつつ取付ける
必要があるため、絶縁バーリアの枚数が多くなるほど絶
縁作業が複雑になることから、本実施例によれば、絶縁
作業が容易となり、コンパクトなブッシングシールド装
置を得ることができる。
Since this embodiment has the above-mentioned structure, the electric field strength at the outer ends of the electrostatic shields 6 and 7 which do not face the connecting lead wires 51 and 52 is greatly reduced.
The thickness of the shield insulation applied to the surface of the electrostatic shield can also be reduced. Therefore, it is easy to manufacture the bushing shield including the electrostatic shield and the shield insulation. Further, since the electric field strength on the shield insulating surface is significantly reduced, the insulating barrier 8 provided outside the electrostatic shield 8 is provided.
The required number of sheets can be reduced. In particular, since the insulating barrier 8 needs to be attached while maintaining a predetermined gap size, the insulating work becomes more complicated as the number of insulating barriers increases. Therefore, according to the present embodiment, the insulating work becomes easier. A compact bushing shield device can be obtained.

【0016】[0016]

【発明の効果】以上説明したように本発明によれば、静
電シールドを接続リード線に対してブッシング側とブッ
シングと反対側の2つに分割し、この分割静電シールド
の接続リード線と反対側の端部にリング状静電シールド
を配置することにより、静電シールドの外径を大きくす
ることなく、静電シールドの端部における電界集中を大
幅に低減することができ、従って静電シールド表面に被
覆する絶縁物の厚さを小さくできるため、コンパクトな
静電シールドの製作が容易になる。また、静電シールド
の外側に配置する絶縁バーリアの枚数を少なくできるた
め、絶縁作業も容易になるという優れた効果を奏する。
その結果、本発明によれば、小形で絶縁特性に優れたブ
ッシングシールド装置の提供が可能になる。
As described above, according to the present invention, the electrostatic shield is divided into two parts, that is, the bushing side and the side opposite to the bushing with respect to the connecting lead wire. By arranging the ring-shaped electrostatic shield at the opposite end, it is possible to significantly reduce the electric field concentration at the end of the electrostatic shield without increasing the outer diameter of the electrostatic shield. Since the thickness of the insulator covering the shield surface can be reduced, it is easy to manufacture a compact electrostatic shield. Moreover, since the number of insulating barriers arranged outside the electrostatic shield can be reduced, an excellent effect that the insulating work is facilitated is achieved.
As a result, according to the present invention, it is possible to provide a small bushing shield device having excellent insulating characteristics.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明のブッシングシールド装置の一実施例を
示す断面図。
FIG. 1 is a sectional view showing an embodiment of a bushing shield device of the present invention.

【図2】従来のブッシングシールド装置の一例を示す断
面図。
FIG. 2 is a sectional view showing an example of a conventional bushing shield device.

【符号の説明】[Explanation of symbols]

1…単位変圧器タンク 2…ブッシング 3…ブッシングポケット 4…接続ダクト 51,52…接続リード線 6…上部静電シールド 7…下部静電シールド 8…ブッシング絶縁バーリア 9…リード絶縁バーリア 10…ブッシング導体 11…ブッシング金具 12…リング状静電シールド 1 ... Unit transformer tank 2 ... Bushing 3 ... Bushing pocket 4 ... Connection duct 51, 52 ... Connection lead wire 6 ... Upper electrostatic shield 7 ... Lower electrostatic shield 8 ... Bushing insulation barrier 9 ... Lead insulation barrier 10 ... Bushing conductor 11 ... Bushing fitting 12 ... Ring-shaped electrostatic shield

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】単相静止誘導器を少なくとも2台に分割し
た単位静止誘導器相互間を、絶縁被覆を施したリード線
を内蔵したダクトにより連結し、前記リード線により前
記単位静止誘導器の巻線と前記ダクトの中間部に設置し
たブッシングとを電気的に接続し、この接続部の周囲に
電界緩和用の静電シールドを設けたブッシングシールド
装置において、 前記静電シールドを前記リード線に対してブッシング側
とブッシングとは反対側の2つに分割し、ブッシングと
は反対側の前記静電シールド端部の内周部にリング状静
電シールドを配置し、前記リング状静電シールドの口径
を、前記静電シールドにおける前記リード線に対向する
側の端部の口径よりも小さくしたことを特徴とするブッ
シングシールド装置。
1. A unit static inductor in which at least two single-phase static inductors are divided is connected to each other by a duct having a lead wire with an insulation coating, and the lead wire of the unit static inductor is connected. In a bushing shield device in which a winding and a bushing installed in an intermediate portion of the duct are electrically connected, and an electrostatic shield for relaxing an electric field is provided around the connection portion, the electrostatic shield is connected to the lead wire. On the other hand, it is divided into two parts, one on the bushing side and the other on the opposite side to the bushing, and a ring-shaped electrostatic shield is arranged on the inner peripheral part of the end of the electrostatic shield on the opposite side to the bushing. The bushing shield device is characterized in that a diameter thereof is made smaller than a diameter of an end portion of the electrostatic shield on a side facing the lead wire.
JP6722493A 1993-03-26 1993-03-26 Bushing shield device Expired - Fee Related JP3372984B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6722493A JP3372984B2 (en) 1993-03-26 1993-03-26 Bushing shield device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6722493A JP3372984B2 (en) 1993-03-26 1993-03-26 Bushing shield device

Publications (2)

Publication Number Publication Date
JPH06283062A true JPH06283062A (en) 1994-10-07
JP3372984B2 JP3372984B2 (en) 2003-02-04

Family

ID=13338731

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6722493A Expired - Fee Related JP3372984B2 (en) 1993-03-26 1993-03-26 Bushing shield device

Country Status (1)

Country Link
JP (1) JP3372984B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050221A (en) * 2012-12-31 2013-04-17 湖北省电力公司宜昌供电公司 Voltage-sharing voltage-surge-resistant hollow electric reactor
EP2846336A1 (en) * 2013-09-10 2015-03-11 Siemens Aktiengesellschaft Connection of at least four electrical conductors
CN107644730A (en) * 2016-07-21 2018-01-30 特变电工沈阳变压器集团有限公司 A kind of 750kV converter power transformers net side outgoing line device
CN112666401A (en) * 2020-12-15 2021-04-16 广东电网有限责任公司电力科学研究院 Transformer insulating sleeve frequency domain dielectric spectrum field testing device, cavity conductor and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104376988B (en) * 2014-12-09 2016-08-17 南车株洲电机有限公司 The attachment means of bushing and high-voltage connection and method of attachment

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050221A (en) * 2012-12-31 2013-04-17 湖北省电力公司宜昌供电公司 Voltage-sharing voltage-surge-resistant hollow electric reactor
CN103050221B (en) * 2012-12-31 2015-08-19 湖北省电力公司宜昌供电公司 All press proof voltage impingement air core reactor
EP2846336A1 (en) * 2013-09-10 2015-03-11 Siemens Aktiengesellschaft Connection of at least four electrical conductors
WO2015036248A1 (en) * 2013-09-10 2015-03-19 Siemens Aktiengesellschaft Connection of at least four electric conductors
US9859701B2 (en) 2013-09-10 2018-01-02 Siemens Aktiengesellschaft Connection of at least four electric conductors
CN107644730A (en) * 2016-07-21 2018-01-30 特变电工沈阳变压器集团有限公司 A kind of 750kV converter power transformers net side outgoing line device
CN107644730B (en) * 2016-07-21 2019-03-29 特变电工沈阳变压器集团有限公司 A kind of 750kV converter power transformer net side outgoing line device
CN112666401A (en) * 2020-12-15 2021-04-16 广东电网有限责任公司电力科学研究院 Transformer insulating sleeve frequency domain dielectric spectrum field testing device, cavity conductor and method

Also Published As

Publication number Publication date
JP3372984B2 (en) 2003-02-04

Similar Documents

Publication Publication Date Title
JPH0213445B2 (en)
US7737814B1 (en) Electrostatic shield and voltage transformer
EP2057644B1 (en) High voltage bushing
US4604673A (en) Distribution transformer with surge protection device
JPH06283062A (en) Bushing shield device
HU200029B (en) High-voltage transformer
US4540967A (en) Molded transformer with grounded electrically conductive layer
JPH02132809A (en) Multiplex cylindrical winding
JPH0669047A (en) Bushing shield device
US4042900A (en) Electrostatic shielding of disc windings
US4055825A (en) Voltage transformer for high voltage
US2316558A (en) Transformer
JPS61135107A (en) Gas insulated transformer for instrument
JP2000164435A (en) Stationary induction apparatus
KR200217073Y1 (en) A transformer for reducing a surge valtage
JPH06132145A (en) Filament transformer for x-ray tube
JP3160889B2 (en) Transformer
JPS60193316A (en) Direct current oil filled electric apparatus
JPS63211710A (en) Multiplex cylindrical coil winding
JPS62229916A (en) Transformer winding
JPS6138171Y2 (en)
JP2002164226A (en) Transformer for transducer
JPS60193314A (en) Direct current electric apparatus filled with oil
US5710534A (en) Electrical apparatus including electric field control means
JPH0917259A (en) Bushing for direct current

Legal Events

Date Code Title Description
S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313113

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees