JPH0669047A - Bushing shield device - Google Patents
Bushing shield deviceInfo
- Publication number
- JPH0669047A JPH0669047A JP4222599A JP22259992A JPH0669047A JP H0669047 A JPH0669047 A JP H0669047A JP 4222599 A JP4222599 A JP 4222599A JP 22259992 A JP22259992 A JP 22259992A JP H0669047 A JPH0669047 A JP H0669047A
- Authority
- JP
- Japan
- Prior art keywords
- bushing
- shield
- diameter
- lead wire
- divided
- 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.)
- Pending
Links
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
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は変圧器、リアクトル等の
静止誘導電器のブッシングシールド装置に係り、特に分
割された複数の単位変圧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 induction electric transformer 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 unit transformers. 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 1500/3 ＭＶＡ〜 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 1000 ｋＶ級の送電用変圧器において
は、単器容量が一相当たり 3000/3 ＭＶＡ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 have tended to have a large capacity and a large size. For example, a transformer used for 500 kV class power transmission has a single unit capacity of 1500/3 MVA to 2000/3 MVA per phase. Due to the size limitation of transportation, a unit transformer in which a single-phase device is divided into two or three is adopted. Moreover, in the 1000 kV class transmission transformer planned for the next generation transmission voltage, the unit capacity will be 3000/3 MVA or more per phase, so in this case as well, the single-phase unit was divided into 2 to 3 parts. The structure consists of a single-phase transformer.
【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 electrostatic shield whose surface is insulated for electric field relaxation. However, multiple electrostatic barriers cover the outside of this electrostatic shield when the voltage is high.
【０００４】例えば特公昭６３−４２８４１号公報記載
のブッシングシールドは図３に示すように、端部に曲率
をもたせた内径寸法、外径寸法とも変わらない円筒状の
シールド電極の表面に絶縁被覆を施した構造が提案され
ている。For example, as shown in FIG. 3, the bushing shield described in Japanese Patent Publication No. 63-42841 has an insulating coating on the surface of a cylindrical shield electrode whose end portion has a curvature and whose inner and outer diameters are the same. The applied structure is proposed.
【０００５】[0005]
【発明が解決しようとする課題】すなわち、従来のブッ
シングシールドは、図３に示すようにブッシング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）からの接続リード線５1，５
2 はブッシング２の下端においてブッシング導体１０と
Ｔ字状に接続される。この接続部とブッシング２の下部
を電界的に保護するため上部ブッシングシールド６およ
び下部ブッシングシールド７が取り付けられている。こ
のようにブッシングシールド６，７を使用した場合、ブ
ッシング２と反対側のブッシングシールド６，７の端部
には、ブッシングシールドの外径の大きさに比べてブッ
シングシールドの端部曲率が小さいため電界が大きく集
中する。従って、必然的にブッシングシールド６，７の
表面にシールド絶縁被覆厚を増大するとか、またブッシ
ングシールド外側の絶縁バーリア８の枚数を増大する等
が行われ、絶縁構造の複雑化が生じる。９はリード絶縁
バーリア、１１はブッシング金具である。That is, in the conventional bushing shield, as shown in FIG. 3, the bushing pocket 3 accommodating the bushing 2 is connected to the unit transformers 1, 1 through the connection duct 4. Also, the connection lead wires 5 1 , 5 from the windings (not shown) of the unit transformers 1 , 1
2 is connected to the bushing conductor 10 at the lower end of the bushing 2 in a T-shape. An upper bushing shield 6 and a lower bushing shield 7 are attached to protect the connection portion and the lower portion of the bushing 2 in an electric field. When the bushing shields 6 and 7 are used in this way, the end curvature of the bushing shields 6 and 7 on the side opposite to the bushing 2 is smaller than the outer diameter of the bushing shield because the curvature of the end portions of the bushing shields is small. The electric field is largely concentrated. Therefore, inevitably, the thickness of the shield insulating coating is increased on the surfaces of the bushing shields 6 and 7, the number of insulating barriers 8 outside the bushing shield is increased, and the insulating structure is complicated. Reference numeral 9 is a lead insulating barrier, and 11 is a bushing fitting.
【０００６】また、ブッシングシールド端部の電界強度
をこの端部の曲率を大きくして下げる方法では、ブッシ
ングシールドの外径寸法を非常に大きくする必要があ
り、ブッシングシールドとブッシングポケット３間の電
界強度が大きくなる為ブッシングポケット径の拡大、あ
るいはブッシングシールドの外側の絶縁バーリアの枚数
増大による絶縁構造の複雑化が生じる。Further, in the method of lowering the electric field strength at the end of the bushing shield by increasing the curvature of this end, it is necessary to make the outer diameter of the bushing shield very large, and the electric field between the bushing shield and the bushing pocket 3 is increased. Since the strength is increased, the diameter of the bushing pocket is increased, or the number of insulating barriers outside the bushing shield is increased, 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、その目的はブッシングシールドの外径寸法が小さい
にも拘らず端部電界集中が小さく、かつブッシングシー
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, and its object is to reduce the concentration of electric field at the end portion despite the small outer diameter of the bushing shield and to reduce the number of insulating barriers outside the bushing shield. An object is to provide a bushing shield device having an insulating structure.
【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、単相器を少なくとも２台に分割した単位変
圧器相互間を、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変圧器
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、このブッシング
側の分割静電シールドの口径を前記接続リード線と反対
側の端部を複数回曲率を変えて大きく絞り込むととも
に、この口径を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。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention connects unit transformers in which at least two single-phase units are divided by a duct containing a lead wire with an insulating coating. Then, a bushing shield device in which the winding of the unit transformer and the bushing installed in the intermediate portion of the duct are electrically connected by the lead wire, and an electrostatic shield for mitigating an electric field is provided around the connection portion. In the above, the electrostatic shield is divided into two parts on the bushing side and the side opposite to the bushing with respect to the lead wire, and the diameter of the divided electrostatic shield on the bushing side is set to the end part on the opposite side to the connection lead wire. It is characterized in that the diameter is narrowed by changing the curvature a plurality of times and the diameter is made smaller than the diameter of the end portion on the side facing the lead wire.
【０００９】[0009]
【作用】上記したようなシールド構造とすることによ
り、リード線あるいはブッシングのない側のブッシング
シールド端部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、ブッシングシールドの外径寸
法を大きくすることなく、ブッシングシールド端部にお
ける電界集中を大幅に緩和できる。With the shield structure as described above, the curvature of the end portion of the bushing shield on the side without the lead wire or bushing can be increased, and the curvature of the end portion with respect to the diameter of the end portion can be increased. Since the height can be increased, the electric field concentration at the end of the bushing shield can be significantly reduced without increasing the outer diameter of the bushing shield.
【００１０】[0010]
【実施例】以下本発明の実施例を図を参照して説明す
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字状に接続される。この
接続部とブッシング２の下部を電界的に保護するため上
部ブッシングシールド６および下部ブッシングシールド
７が取り付ける。このブッシングシールド６と７は一体
とした方が、静電シールドとしての機能上好ましいが、
ブッシングシールド６および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、穴部表面に絶縁物を被覆すること
は困難であるので、ブッシングシールドは上部ブッシン
グシールド６と下部ブッシングシールド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。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a sectional view of an embodiment of the present invention. As shown in the figure, the connection lead wires 5 1 and 5 2 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 bushing shield 6 and a lower bushing shield 7 are attached to protect the connection portion and the lower portion of the bushing 2 in an electric field. It is preferable that the bushing shields 6 and 7 are integrated, because of their function as an electrostatic shield.
It is necessary to provide a shield insulating coating on the surfaces of the bushing shields 6 and 7 in order to reduce the electric field strength and improve the dielectric breakdown strength, and it is difficult to coat the surface of the hole with an insulator. Is divided into an upper bushing shield 6 and a lower bushing shield 7, and shield insulating coatings 6a and 7a are provided on the respective surfaces.
【００１１】ブッシングシールド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、
ブッシングシールド６，７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、上部ブッ
シングシールド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、ブッシングシールド６とブッ
シング導体１０が大きく離れているため、ブッシングシ
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、下部ブッシングシールド７の下部端部は空間的に大
きく開口していることから、このブッシングシールド７
の下部端部には上部ブッシングシールド６の上部端部よ
りも大きく、電界が集中する。Since the potentials of the bushing shields 6 and 7 and the conductor potentials of the connecting lead wires 5 1 and 5 2 are the same,
The electric field strength of the end portions of the bushing shields 6, 7 on the side facing the connection lead wires 5 1 , 5 2 is small. On the other hand, the upper bushing shield 6 is penetrated by the bushing conductor 10 having the same potential as this shield. However, since the bushing shield 6 and the bushing conductor 10 are widely separated, the electric field is largely concentrated at the upper end portion of the bushing shield 6. To do. Further, since the lower end portion of the lower bushing shield 7 has a large opening spatially, this bushing shield 7
The electric field is concentrated at the lower end of the upper bushing shield 6 than at the upper end thereof.
【００１２】従って、本実施例においては、ブッシング
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、上部ブ
ッシングシールド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行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む。この端部の口径の大
きさは、このブッシング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
り若干大きくする。Therefore, in this embodiment, the electric field concentration at the end portions of the bushing shields 6 and 7 is alleviated by devising the shape of each end portion. That is, in the upper bushing shield 6, the curvature of the end portion on the side where the bushing 2 penetrates is made smaller as it goes upward.
Narrow inward while changing multiple times. The diameter of this end is such that the bushing shield has a bushing fitting 11
Is slightly larger than the outer diameter of the bushing fitting 11.
【００１３】また、下部ブッシングシールド７において
は、下部端部での電界集中が上部ブッシングシールド６
の場合よりも大きいことから、絞り込む曲率を上部ブッ
シングシールド６の場合よりも大きくする。Further, in the lower bushing shield 7, electric field concentration at the lower end portion is caused by the upper bushing shield 6.
Since it is larger than in the case of, the narrowing curvature is made larger than in the case of the upper bushing shield 6.
【００１４】下部ブッシングシールド７の下部端部の口
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ブッシングシールド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
さくする。The diameter of the lower end portion of the lower bushing shield 7 is such that it is possible to check the connection state between the bushing 2 and the connecting lead wires 5 1 , 5 2 and to attach the lower bushing shield 7 to the lower end portion of the bushing. Down to the size of.
【００１５】本実施例は上記したような構造であるの
で、ブッシングシールド６，７の接続リード線５1 ，５
2 に対向しない外側の端部の電界強度は大巾に低減する
ので、ブッシング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。したがって、ブッシング
シールドとシールド絶縁から構成される静電シールドの
製作が容易になる。Since this embodiment has the structure as described above, the connection lead wires 5 1 , 5 of the bushing shields 6, 7 are formed.
Since the electric field strength at the outer end that does not face 2 is greatly reduced, the thickness of the shield insulation applied to the bushing shield surface can also be made small. Therefore, it becomes easy to manufacture an electrostatic shield composed of the bushing shield and the shield insulation.
【００１６】また、シールド絶縁表面の電界強度が大巾
に低減されるため、ブッシング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。
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。Further, since the electric field strength on the shield insulating surface is greatly reduced, the required number of insulating barriers 8 provided outside the bushing shield can be reduced.
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 easy and compact. A bushing shield device can be obtained.
【００１７】図２は、本発明の他の実施例の接続リード
側からみた正面図である。同図に示すように、接続リー
ド線５1 ，５2 に対して上下に２分割されたブッシング
シールド６と７は、ブッシングシールドの接続リード線
側の端部のうち、この接続リード線５1 ，５2 の近傍の
みを窪ませ、分割されたブッシングシールド６，７間の
接続リードがない部分の離間距離を、接続リードがある
部分の離間距離よりも小さくしたブッシングシールドの
構造を示している。FIG. 2 is a front view of another embodiment of the present invention viewed from the side of the connecting lead. As shown in the figure, the bushing shields 6 and 7 which are vertically divided into two with respect to the connecting lead wires 5 1 and 5 2 are the connecting lead wire 5 1 among the end portions of the bushing shield on the connecting lead wire side. , 5 2 is recessed so that the separation distance between the divided bushing shields 6 and 7 where there is no connection lead is smaller than the separation distance where there is a connection lead. .
【００１８】接続リード線５1 ，５2 の寸法が大きくな
るにつれて、分割されたブッシングシールド６，７間の
離間距離が大きくなるため、接続リードがない部分のブ
ッシングシールド端部の電界集中が大きくなる。ブッシ
ングシールド６，７の接続リードがない部分の離間空間
は、静電シールドとしての機能および接続組立に必要と
されるものではないことから、ブッシングシールド間の
離間距離を小さくしてブッシングシールド端部の電界集
中を小さくすることができ、この端部の絶縁補強をしな
くてもすむ。As the size of the connecting lead wires 5 1 and 5 2 increases, the distance between the divided bushing shields 6 and 7 increases, so that the electric field concentration at the end portion of the bushing shield in the part without the connecting lead increases. Become. Since the separated space of the bushing shields 6 and 7 where the connection leads are not provided is not required for the function as an electrostatic shield and for the connection assembly, the separation distance between the bushing shields is reduced to make the bushing shield end portions smaller. It is possible to reduce the concentration of the electric field on the end, and it is not necessary to reinforce the insulation at this end.
【００１９】[0019]
【発明の効果】以上説明したように、本発明によれば、
ブッシング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、この分割ブッ
シングシールドの接続リード線と反対側の端部を複数回
曲率を変えながら大きく絞り込み、この口径を前記接続
リード線に対向する側の端部の口径よりも小さくするこ
とにより、ブッシングシールドの外径を大きくすること
なく、ブッシングシールドの端部における電界集中を大
巾に低減することができ、従ってブッシングシールド表
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、ブッシン
グ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、すぐれた
効果を奏する。As described above, according to the present invention,
The bushing shield is divided into two parts, the bushing side and the side opposite to the bushing, with respect to the connecting lead wire, and the end of the split bushing shield on the opposite side of the connecting lead wire is narrowed down a number of times while changing the curvature. By making the diameter smaller than the diameter of the end portion on the side facing the connection lead wire, it is possible to greatly reduce the electric field concentration at the end portion of the bushing shield without increasing the outer diameter of the bushing shield. Since the thickness of the insulator covering the bushing shield surface can be reduced, it is easy to manufacture a compact electrostatic shield. Further, since the number of insulating barriers arranged outside the bushing shield can be reduced, the insulating work can be facilitated, which is an excellent effect.
【図１】本発明の一実施例の断面図。FIG. 1 is a sectional view of an embodiment of the present invention.
【図２】本発明の他の実施例の接続リード線側からみた
正面図。FIG. 2 is a front view of the other embodiment of the present invention viewed from the side of a connecting lead wire.
【図３】従来のブッシングシールドの取付状態を示す断
面図。FIG. 3 is a cross-sectional view showing a mounting state of a conventional bushing shield.
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…上部ブッシングシールド、７…下部ブッシング
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。1 ... Unit transformer tank, 2 ... Bushing, 3 ... Bushing pocket, 4 ... Connection duct, 5 1 , 5 2 ... Connection lead wire, 6 ... Upper bushing shield, 7 ... Lower bushing shield, 8 ... Bushing insulation barrier, 9 ... Lead insulation barrier, 10 ... Bushing conductor, 11 ... Bushing fitting.
Claims (1)
変圧器相互間を、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変圧
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、このブッシン
グ側の分割静電シールドの口径を前記接続リード線と反
対側の端部を複数回曲率を変えて大きく絞り込むととも
に、この口径を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 transformer in which a single-phase unit is divided into at least two units is connected to each other by a duct having a lead wire with an insulating coating built therein, and the lead wire and the winding of the unit transformer are connected to each other. In a bushing shield device in which a bushing installed in the middle of the duct is electrically connected, and an electrostatic shield for mitigating an electric field is provided around this connection portion,
The electrostatic shield is divided into two parts on the bushing side and the side opposite to the bushing with respect to the lead wire, and the diameter of the divided electrostatic shield on the bushing side is set a plurality of times at the end part on the opposite side to the connection lead wire. A bushing shield device characterized in that the diameter is made smaller than the diameter of the end portion on the side facing the lead wire while the curvature is changed and the diameter is narrowed down significantly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4222599A JPH0669047A (en) | 1992-08-21 | 1992-08-21 | Bushing shield device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4222599A JPH0669047A (en) | 1992-08-21 | 1992-08-21 | Bushing shield device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0669047A true JPH0669047A (en) | 1994-03-11 |
Family
ID=16785002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4222599A Pending JPH0669047A (en) | 1992-08-21 | 1992-08-21 | Bushing shield device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0669047A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140117435A (en) * | 2012-01-26 | 2014-10-07 | 지멘스 악티엔게젤샤프트 | Shielding device for an electrically conductive connecting element |
| EP2846336A1 (en) * | 2013-09-10 | 2015-03-11 | Siemens Aktiengesellschaft | Connection of at least four electrical conductors |
| CN113478774A (en) * | 2021-06-03 | 2021-10-08 | 武汉露能科技有限公司 | Insulating coating constant voltage synchronous centering coaxial guider of overhead bare conductor |
| KR20230120385A (en) * | 2022-02-09 | 2023-08-17 | 에이치디현대일렉트릭 주식회사 | Shield apparatus for bushing of transformer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5880815A (en) * | 1981-11-10 | 1983-05-16 | Hitachi Ltd | Connection device of stationary induction electric apparatus |
| JPS5837118B2 (en) * | 1980-06-04 | 1983-08-13 | ファナック株式会社 | Industrial robot wrist mechanism |
-
1992
- 1992-08-21 JP JP4222599A patent/JPH0669047A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5837118B2 (en) * | 1980-06-04 | 1983-08-13 | ファナック株式会社 | Industrial robot wrist mechanism |
| JPS5880815A (en) * | 1981-11-10 | 1983-05-16 | Hitachi Ltd | Connection device of stationary induction electric apparatus |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140117435A (en) * | 2012-01-26 | 2014-10-07 | 지멘스 악티엔게젤샤프트 | Shielding device for an electrically conductive connecting element |
| 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 |
| CN105518813A (en) * | 2013-09-10 | 2016-04-20 | 西门子公司 | Connection of at least four electric conductors |
| US9859701B2 (en) | 2013-09-10 | 2018-01-02 | Siemens Aktiengesellschaft | Connection of at least four electric conductors |
| CN113478774A (en) * | 2021-06-03 | 2021-10-08 | 武汉露能科技有限公司 | Insulating coating constant voltage synchronous centering coaxial guider of overhead bare conductor |
| CN113478774B (en) * | 2021-06-03 | 2023-05-09 | 武汉露能科技有限公司 | Insulating coating constant-pressure synchronous centering coaxial guiding device for overhead bare conductor |
| KR20230120385A (en) * | 2022-02-09 | 2023-08-17 | 에이치디현대일렉트릭 주식회사 | Shield apparatus for bushing of transformer |
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