JP2552203Y2 - Power cable connection - Google Patents
Power cable connectionInfo
- Publication number
- JP2552203Y2 JP2552203Y2 JP1991068421U JP6842191U JP2552203Y2 JP 2552203 Y2 JP2552203 Y2 JP 2552203Y2 JP 1991068421 U JP1991068421 U JP 1991068421U JP 6842191 U JP6842191 U JP 6842191U JP 2552203 Y2 JP2552203 Y2 JP 2552203Y2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- tip
- high dielectric
- dielectric constant
- shielding layer
- 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 - Fee Related
Links
Landscapes
- Cable Accessories (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この考案は、プラスチック電力ケ
ーブルのモールド接続部に関するもので、特に電気絶縁
性能の向上のために外導処理部の内側に高誘電率層を配
置した構造の接続部に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded connecting portion of a plastic power cable, and more particularly to a connecting portion having a structure in which a high dielectric constant layer is arranged inside an outer conductor for improving electric insulation performance. Things.
【０００２】[0002]
【従来の技術】図３において、１０はケーブル導体、１
２はケーブル絶縁体、１４はケーブル外部遮蔽層であ
る。１６はモールド工法で製作した補強絶縁体、１８は
接続部の外部遮蔽層である。接続部外部遮蔽層１８の内
側に高誘電率層２０を設け、これによって電界緩和を図
り、電気絶縁性能の向上を図っている。ケーブル外部遮
蔽層１４の先端１４０は、高誘電率層２０の端部の内側
に入り込んでいる。こうすると、弱点となり易い削り残
されたケーブル外部遮蔽層１４の端部（接続部外部遮蔽
層１８との継ぎ目）における電界が緩和され、かつ施工
も容易になる。2. Description of the Related Art In FIG.
2 is a cable insulator and 14 is a cable outer shielding layer. Reference numeral 16 denotes a reinforcing insulator manufactured by a molding method, and reference numeral 18 denotes an external shielding layer of a connection portion. A high dielectric constant layer 20 is provided inside the connection portion external shielding layer 18 to thereby alleviate an electric field and improve electrical insulation performance. The tip 140 of the cable outer shielding layer 14 enters inside the end of the high dielectric constant layer 20. By doing so, the electric field at the end of the cable outer shielding layer 14 (the joint with the connection part outer shielding layer 18), which tends to be a weak point, is eased, and the construction is also facilitated.
【０００３】[0003]
【考案が解決しようとする課題】ケーブル外部遮蔽層１
４の先端１４０は、テーパ状に尖った形をしている（そ
こから先の部分が削り取られるため）。また、一般に電
束は誘電率の高い誘電体の方に集まる性質がある。その
ため、図４のように、ケーブル外部遮蔽層１４の先端１
４０に等電位線が回り込み、先端１４０の電気的ストレ
スが高まる。その結果、先端１４０から絶縁破壊を起こ
し易くなり高誘電率層を設けたために、かえって電気的
性能が低下してしまうという問題が生じる。[Problem to be solved by the invention] Cable outer shielding layer 1
The tip 140 of 4 has a tapered shape (because the tip is cut away). In general, electric flux has a property of gathering toward a dielectric having a high dielectric constant. Therefore, as shown in FIG.
The equipotential line wraps around 40, and the electrical stress at the tip 140 increases. As a result, there is a problem that the dielectric breakdown easily occurs from the tip 140 and the high dielectric constant layer is provided, so that the electric performance is rather deteriorated.
【０００４】[0004]
【課題を解決するための手段】図１のように、先端２２
０に丸みを持たせた半導電層からなる補強層２２を、ケ
ーブル外部遮蔽層１４の先端にかぶせ、その丸みを持つ
先端２２０が、高誘電率層２０端部の内側に入り込むよ
うにする。Means for Solving the Problems As shown in FIG.
A reinforcing layer 22 made of a semiconductive layer having a rounded zero is placed over the tip of the cable outer shielding layer 14 so that the rounded tip 220 enters inside the end of the high dielectric constant layer 20.
【０００５】この補強層２２は、半導電性熱収縮チュー
ブ（架橋剤入り未架橋の）を用いて形成するのが適当で
ある。すなわち、予め先端に丸みを持たせた熱収縮チュ
ーブを作っておいて、ケーブル外部遮蔽層１４の先端部
からケーブル絶縁体１２にかけてかぶせ、熱収縮させて
密着させる。The reinforcing layer 22 is suitably formed using a semiconductive heat-shrinkable tube (uncrosslinked with a crosslinking agent). That is, a heat-shrinkable tube having a rounded end is made in advance, and the heat-shrinkable tube is covered from the front end portion of the cable outer shielding layer 14 to the cable insulator 12 and is thermally contracted and adhered.
【０００６】高誘電率層２０は、その端部が、補強層２
２の先端２２０を覆うように形成する。高誘電率層２０
の上に接続部外部遮蔽層１８を設け、かつその端部と補
強層２２とを電気的に接続する。その後、補強層２２，
高誘電率層２０，接続部外部遮蔽層１８を一括モールド
する。[0006] The high dielectric layer 20 is formed such that its end is the reinforcing layer 2.
The second tip 220 is formed so as to cover the tip 220. High dielectric constant layer 20
A connection portion external shielding layer 18 is provided on the upper surface of the substrate, and the end portion thereof and the reinforcing layer 22 are electrically connected. Then, the reinforcing layer 22,
The high dielectric constant layer 20 and the connection portion external shielding layer 18 are collectively molded.
【０００７】[0007]
【考案の作用効果】ケーブル外部遮蔽層の先端に、先端
に丸みを持たせた半導電層からなる補強層がかぶせら
れ、その丸みを持つ先端が高誘電率層端部の内側に入り
込むようにしているので、図２のように、補強層２２の
先端２２０の等電位線の廻り込みが押えられる。そのた
め、モールド接続部に電界緩和効果を狙って高誘電率層
２０を適用し、かつその内側にケーブル外部遮蔽層１４
の先端１４０を入り込ませて、弱点となり易い削り残さ
れたケーブル外部遮蔽層１４の端部（接続部外部遮蔽層
１８との継ぎ目）における電界を緩和し、かつ施工も容
易にする場合に生じていたケーブル外部遮蔽層先端への
電界集中という問題が解消される。これにより、電力ケ
ーブルモールド接続部の電気的特性の向上あるいは絶縁
厚の低減を画ることができる。[Function and effect of the invention] A reinforcing layer made of a semiconductive layer having a rounded tip is covered on the tip of the cable outer shielding layer so that the rounded tip enters the inside of the end of the high dielectric constant layer. Therefore, as shown in FIG. 2, the wraparound of the equipotential line at the tip 220 of the reinforcing layer 22 is suppressed. Therefore, the high dielectric constant layer 20 is applied to the mold connection part for the purpose of reducing the electric field, and the cable outer shielding layer 14 is provided inside the high dielectric constant layer 20.
Of the cable outer shielding layer 14 (seam with the connecting part outer shielding layer 18) which is easily cut by inserting the tip 140 of the cable outer shield layer 14 which is likely to be a weak point. The problem that the electric field is concentrated on the tip of the cable outer shielding layer is eliminated. As a result, it is possible to improve the electrical characteristics of the power cable mold connection or reduce the insulation thickness.
【図１】本考案実施例の説明図。FIG. 1 is an explanatory view of an embodiment of the present invention.
【図２】本考案実施例における高誘電率層の端部付近の
電界解析図。FIG. 2 is an electric field analysis diagram near an end of a high dielectric constant layer in the embodiment of the present invention.
【図３】従来技術の説明図。FIG. 3 is an explanatory diagram of a conventional technique.
【図４】従来技術における高誘電率層の端部付近の電界
解析図。FIG. 4 is an electric field analysis diagram near the end of a high dielectric constant layer according to a conventional technique.
１０ ケーブル導体 １２ ケーブル絶縁体 １４ ケーブル外部遮蔽層 １４０ ケーブル外部遮蔽層の先端 １６ 補強絶縁体 １８ 接続部の外部遮蔽層 ２０ 高誘電率層 ２２ ケーブル外部遮蔽層の補強層 ２２０ 補強層の先端 REFERENCE SIGNS LIST 10 cable conductor 12 cable insulator 14 cable outer shielding layer 140 tip of cable outer shielding layer 16 reinforcing insulator 18 outer shielding layer of connection part 20 high dielectric constant layer 22 reinforcing layer of cable outer shielding layer 220 tip of reinforcing layer
Claims (1)
高誘電率層が設けられ、ケーブル遮蔽層の先端が前記高
誘電率層の端部の内側に入り込んでいる、電力ケーブル
の接続部において、 前記ケーブル外部遮蔽層の先端に、先端に丸みを持たせ
た半導電層からなる補強層がかぶせられ、その丸みを持
つ先端が前記高誘電率層端部の内側に入り込んでいる、
電力ケーブルの接続部。1. A power cable according to claim 1, wherein a high dielectric constant layer is provided between the reinforcing insulator and the connection portion external shielding layer, and a tip of the cable shielding layer enters inside an end of the high dielectric constant layer. In the connection portion, a reinforcing layer made of a semiconductive layer having a rounded tip is covered on the tip of the cable outer shielding layer, and the rounded tip enters the inside of the end of the high dielectric constant layer. ,
Power cable connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991068421U JP2552203Y2 (en) | 1991-08-02 | 1991-08-02 | Power cable connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991068421U JP2552203Y2 (en) | 1991-08-02 | 1991-08-02 | Power cable connection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0515632U JPH0515632U (en) | 1993-02-26 |
| JP2552203Y2 true JP2552203Y2 (en) | 1997-10-29 |
Family
ID=13373204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991068421U Expired - Fee Related JP2552203Y2 (en) | 1991-08-02 | 1991-08-02 | Power cable connection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2552203Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK132707C (en) * | 1973-07-13 | 1976-07-12 | Schering Ag | ANALOGICAL PROCEDURE FOR THE PREPARATION OF 1,3,16,17-TETRAOXYGENED 8ALFA-OSTRATRIENS |
| JPS58192422A (en) * | 1982-04-30 | 1983-11-09 | 日立電線株式会社 | Insulated junction box for power cable |
-
1991
- 1991-08-02 JP JP1991068421U patent/JP2552203Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0515632U (en) | 1993-02-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |