JPH10214524A - Plastic insulated long ac cable - Google Patents
Plastic insulated long ac cableInfo
- Publication number
- JPH10214524A JPH10214524A JP1553297A JP1553297A JPH10214524A JP H10214524 A JPH10214524 A JP H10214524A JP 1553297 A JP1553297 A JP 1553297A JP 1553297 A JP1553297 A JP 1553297A JP H10214524 A JPH10214524 A JP H10214524A
- Authority
- JP
- Japan
- Prior art keywords
- semiconductive
- layer
- cable
- plastic
- 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.)
- Pending
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、大容量送電ケーブ
ル、特に交流で送電するプラスチック絶縁交流ケーブル
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a large-capacity power transmission cable, and more particularly to a plastic insulated AC cable for transmitting AC power.
【０００２】[0002]
【従来の技術】２７５ｋＶ、５００ｋＶクラスの交流電
力ケーブルでは現場布設時のケーブル接続方式としてＥ
ＭＪ（押し出しモールド接続）が使用されている。この
方式は３相を接続するのに１ヶ月以上と長時間を要す
る。また現地で接続するため異物管理、接続後の電気試
験などが困難なことなどのため、全線路の中で電気的弱
点となっている。そこで、近年工期短縮、信頼性向上の
両面からケーブルを長尺化し、接続部の数を減らすこと
が望まれるようになってきた。しかし、工場の設備の限
界から、単長としては２〜５ｋｍが限界となっている。
従って更に長いケーブルを製造するためには、複数のケ
ーブルを工場内で接続して超長尺ケーブルとする必要が
ある。2. Description of the Related Art For AC power cables of 275 kV and 500 kV class, E is used as a cable connection method at the time of installation on site.
MJ (extrusion mold connection) is used. This method requires a long time of one month or more to connect the three phases. In addition, it is an electrical weak point in all tracks due to difficulties such as foreign matter management and electrical test after connection because it is connected locally. Therefore, in recent years, it has been desired to reduce the number of connection portions by increasing the length of the cable in terms of both shortening the construction period and improving the reliability. However, due to the limitations of the equipment in the factory, the single length is limited to 2 to 5 km.
Therefore, in order to manufacture a longer cable, it is necessary to connect a plurality of cables in a factory to make an ultra-long cable.
【０００３】一般に、電力ケーブルは細い銅線（以下素
線という）を撚り合わせて導体とするため、導体表面に
は凹凸ができる。電力ケーブルの電圧が高くなるとこの
凹凸に電界が集中して絶縁破壊を起こすため、導体外周
に平滑な内部半導電層を設けて電界を緩和している。こ
の内部半導電層の厚さは大容量交流ケーブルの設計条件
に合わせて決定することができる。そこで、設計条件に
合わせた大容量交流ケーブルを製造して電気特性を測定
したところ、所期の目的を達成したケーブルを製造でき
た。しかしながらこの大容量交流ケーブルを工場内で複
数本接続して電気特性を測定したところＩｍｐ（インパ
ルス）破壊電圧が１０００ｋＶ以下、ＡＣ破壊電圧が５
００ｋＶ以下と満足する値が得られない場合が生じた。In general, a power cable is formed by twisting a thin copper wire (hereinafter referred to as an element wire) into a conductor, so that the conductor surface has irregularities. When the voltage of the power cable increases, the electric field concentrates on these irregularities and causes dielectric breakdown. Therefore, a smooth internal semiconductive layer is provided around the conductor to reduce the electric field. The thickness of the internal semiconductive layer can be determined according to the design conditions of the large capacity AC cable. Then, when a large-capacity AC cable was manufactured according to the design conditions and the electrical characteristics were measured, a cable that achieved the intended purpose could be manufactured. However, when a plurality of such large-capacity AC cables were connected in a factory and their electrical characteristics were measured, the imp (impulse) breakdown voltage was 1000 kV or less and the AC breakdown voltage was 5
In some cases, a satisfactory value of 00 kV or less could not be obtained.
【０００４】[0004]
【発明が解決しようとする課題】そこで本発明者等は複
数本を接続する前のケーブルと、接続した後のケーブル
の種々な状態で電気特性試験を実施、その結果を分析し
たところ、長尺ケーブルを巻き取り、または巻きもどす
等接続部に曲げや捩じれが加わると電気特性が著しく低
下することを見出し、その原因を詳細に検討した。The present inventors conducted electrical characteristic tests in various states of the cable before connecting a plurality of cables and the cable after the connection, and analyzed the results. It has been found that when the connection portion is bent or twisted, for example, by winding or unwinding the cable, the electrical characteristics are remarkably deteriorated, and the cause thereof is examined in detail.
【０００５】超長尺ケーブルの製造は次のようになされ
る。即ち、製造時にドラム等に巻き取られている２本の
ケーブルの一方を大型の巻き取り装置に巻き直し、その
巻き終わり端末からケーブル導体を露出させる。接続す
るもう一方のケーブルはドラム巻きした状態で端部の導
体を露出し、導体相互を先ず溶接接続する。工場におけ
る導体の接続は、接続長を出来るだけ短くすることと、
ケーブルの外径をできるだけケーブル本体と同等とする
ために、主として図１に示すように導体１の先端を両導
体が突き合わされたときにＶ字状になるように斜めにカ
ットし、このＶ字状突き合わせ目を接続するＶカット溶
接方式で接続する。次にこのＶカット溶接部２を覆うよ
うに半導電テープ３と半導電プラスチック層４とで内部
半導電層（以下内部半導電層という）５を設け、更にプ
ラスチック絶縁層６、外部半導電層７を被覆して接続を
完成させ、このように接続したケーブルを大型の巻き取
り装置に巻き取る。この作業を繰り返すことにより超長
尺ケーブルが製造される。[0005] The manufacture of an ultra-long cable is performed as follows. That is, one of the two cables wound around a drum or the like at the time of manufacturing is rewound around a large winding device, and the cable conductor is exposed from the end of the winding. The other cable to be connected exposes the conductor at the end in the state of being wound around the drum, and the conductors are first welded together. The connection of conductors in the factory should be as short as possible,
In order to make the outer diameter of the cable as equal as possible to the cable main body, the tip of the conductor 1 is cut obliquely so as to form a V-shape when both conductors abut, as shown in FIG. The connection is made by a V-cut welding method that connects the joints. Next, an inner semiconductive layer (hereinafter referred to as an inner semiconductive layer) 5 is provided with a semiconductive tape 3 and a semiconductive plastic layer 4 so as to cover the V-cut welded portion 2, and furthermore, a plastic insulating layer 6 and an outer semiconductive layer 7 to complete the connection and the cable thus connected is wound up on a large winding device. By repeating this operation, an ultra-long cable is manufactured.
【０００６】上述のように製造されたケーブルの電気特
性が著しく低下する原因を探るためにケーブルを分解し
て詳細に調査したところ、導体を接続した箇所近傍にお
いて内部半導電層に皺が発生する等の乱れがあり、その
乱れの原因が導体の撚りの緩み（笑い）にあることが判
明した。導体の撚りに緩みが生じる原因は導体相互を溶
接することで、その溶接部分で撚り合わせた導体素線間
の滑りが封じられ、ドラムから巻き戻され、またはドラ
ム等に巻かれる時の伸び又は縮み或いは捩じれを吸収で
きなくなり、その歪みが溶接接続箇所に集中して緩み
（笑い）の原因になっているものと推察される。When the cable manufactured as described above is disassembled and examined in detail to find the cause of the remarkable deterioration of the electrical characteristics of the cable, wrinkles are generated in the inner semiconductive layer near the place where the conductor is connected. It has been found that the cause of the disturbance is loosening of the twist of the conductor (laughing). The cause of the loosening of the twist of the conductor is that the conductors are welded to each other, the slip between the twisted conductor strands is sealed at the welded portion, the unwinding from the drum, or the elongation when winding around the drum etc. It is presumed that shrinkage or torsion cannot be absorbed, and the distortion concentrates on the welded joint and causes looseness (laughter).
【０００７】[0007]
【課題を解決するための手段】このような推察に基づ
き、ケーブル導体の接続部近傍に設ける内部半導電層を
種々検討した結果、電気特性の優れた大容量交流ケーブ
ルを完成するに至った。即ち、本発明の請求項１のケー
ブルは、導体上に半導電テープ層と半導電プラスチック
層とで内部半導電層を構成し、該内部半導電層の外周に
プラスチック絶縁層、外部半導電層を設けてなるプラス
チック絶縁交流ケーブル複数本を接続してなる長尺の交
流ケーブルにおいて、少なくとも導体が接続されている
箇所近傍の前記半導電テープ層と半導電プラスチック層
の厚さの合計が３ｍｍ以上であることを特徴とするプラ
スチック絶縁交流ケーブルである。Based on the above presumption, various studies have been made on the internal semiconductive layer provided in the vicinity of the connection portion of the cable conductor. As a result, a large capacity AC cable having excellent electric characteristics has been completed. That is, the cable according to claim 1 of the present invention comprises an inner semiconductive layer composed of a semiconductive tape layer and a semiconductive plastic layer on a conductor, and a plastic insulating layer and an outer semiconductive layer around the inner semiconductive layer. In a long AC cable formed by connecting a plurality of plastic insulated AC cables provided with a conductor, the total thickness of the semiconductive tape layer and the semiconductive plastic layer at least near the location where the conductor is connected is 3 mm or more. It is a plastic insulated AC cable characterized by the following.
【０００８】本発明の請求項２のケーブルは、導体上に
半導電テープ層と半導電プラスチック層とで内部半導電
層を構成し、該内部半導電層の外周にプラスチック絶縁
層、外部半導電層を設けてなるプラスチック絶縁交流ケ
ーブル複数本を接続してなる長尺の交流ケーブルにおい
て、導体が接続されている箇所近傍の前記半導電テープ
層と半導電プラスチック層の厚さの合計が３ｍｍ以上で
あり、接続部の存在しない部分の半導電テープ層と半導
電プラスチック層の厚さの合計が２．５ｍｍ以上である
ことを特徴とするプラスチック絶縁交流ケーブルであ
る。According to a second aspect of the present invention, there is provided a cable wherein an inner semiconductive layer is formed by a semiconductive tape layer and a semiconductive plastic layer on a conductor, and a plastic insulating layer and an outer semiconductive layer are formed around the inner semiconductive layer. In a long AC cable formed by connecting a plurality of plastic insulated AC cables provided with layers, the total thickness of the semiconductive tape layer and the semiconductive plastic layer near the location where the conductor is connected is 3 mm or more. Wherein the total thickness of the semiconductive tape layer and the semiconductive plastic layer in a portion where no connection portion exists is 2.5 mm or more.
【０００９】[0009]
【発明の実施の形態】本発明のケーブルは、導体上に半
導電テープ層と半導電プラスチック層とで内部半導電層
を構成し、該内部半導電層の外周にプラスチック絶縁
層、外部半導電層を設けてなるプラスチック絶縁交流ケ
ーブル複数本を接続してなる長尺の交流ケーブルであ
る。そして、少なくとも導体が接続されている箇所近傍
の半導電テープ層と半導電プラスチック層とからなる内
部半導電層の厚さの合計は３ｍｍ以上である。BEST MODE FOR CARRYING OUT THE INVENTION The cable according to the present invention comprises an inner semiconductive layer composed of a semiconductive tape layer and a semiconductive plastic layer on a conductor, a plastic insulating layer and an outer semiconductive layer around the inner semiconductive layer. This is a long AC cable formed by connecting a plurality of plastic insulated AC cables provided with layers. The total thickness of the internal semiconductive layer composed of the semiconductive tape layer and the semiconductive plastic layer at least near the location where the conductor is connected is 3 mm or more.
【００１０】本発明においては、内部半導電層の厚さが
３ｍｍ以上あればケーブル導体の接続部近傍における導
体の撚りの緩み（笑い）に起因する内部半導電層表面の
皺の発生が防止できる。内部半導電層を半導電テープと
半導電プラスチックとで構成するのは、テープを巻くだ
けではテープの幅に沿って表面に凹凸が生じて内部半導
電層表面を平滑にできず、この凹凸に電界が集中して電
気特性の低下を招くためで、半導電プラスチックで表面
を平滑化することにより電気特性を向上させるためであ
る。特に、導体接続部近傍の導体の撚りの緩み（笑い）
を緩和するには弾性に乏しい半導電テープを２回以上巻
くことが好ましく、特に好ましいのは３回以上である。
なお、枚数を多くすれば効果は大きくなるが必要以上に
厚くすることは経済的にも好ましくなく、またケーブル
接続部の外径が大きくなる等の弊害にもなる。In the present invention, if the thickness of the internal semiconductive layer is 3 mm or more, wrinkles on the surface of the internal semiconductive layer due to loosening of the twist (laughing) of the conductor near the connection portion of the cable conductor can be prevented. . When the inner semiconductive layer is composed of semiconductive tape and semiconductive plastic, wrapping the tape alone causes irregularities on the surface along the width of the tape, making it impossible to smooth the inner semiconductive layer surface. This is because the electric field is concentrated and the electric characteristics are lowered, and the electric characteristics are improved by smoothing the surface with semiconductive plastic. In particular, loosening of the twist of the conductor near the conductor connection (laughing)
It is preferable to wind the semiconductive tape having poor elasticity twice or more times, and more preferably three times or more.
It should be noted that increasing the number of sheets increases the effect, but increasing the thickness more than necessary is not economically preferable, and also has an adverse effect such as an increase in the outer diameter of the cable connection portion.
【００１１】本発明においては、ケーブル本体の内部半
導電層の厚さと導体接続部近傍の内部半導電層との厚さ
に差を設けてもよい。ケーブル本体部分の導体素線に撚
りの緩み（笑い）が発生する危険性はほとんどなく、従
って、内部半導電層の厚さは２．５ｍｍ以上あれば十分
であり、接続部近傍における内部半導電層の厚さは前記
理由により３ｍｍ以上とする。In the present invention, a difference may be provided between the thickness of the internal semiconductive layer of the cable body and the thickness of the internal semiconductive layer near the conductor connection portion. There is almost no danger of twisting (laughing) occurring in the conductor strands of the cable body. Therefore, it is sufficient if the thickness of the internal semiconductive layer is 2.5 mm or more. The thickness of the layer is 3 mm or more for the above reason.
【００１２】本発明における半導電プラスチック層の厚
さは、前記半導電テープ巻層で生じる凹凸を平滑化でき
る程度の厚さがあれば足り、その厚さは２ｍｍ以上が好
ましい。半導電プラスチック層の厚さが薄い場合は半導
電テープ巻きの凹凸を完全に消すことができず、僅かに
凹凸が残存していてもその箇所から絶縁破壊する危険性
があるためで、２ｍｍ以上あればその危険性が解消す
る。また、ケーブル本体の内部半導電層を構成する半導
電プラスチック層の厚さは、整備された工場で押し出し
成形するため薄くすることが可能であるが、少なくとも
１．６ｍｍ以上の厚さとすることが安全上好ましい。な
お、厚くすることは経済的にも好ましくなく、またケー
ブルの外径が大きくなる等の弊害にもなる。The thickness of the semiconductive plastic layer in the present invention is sufficient if it can smooth the unevenness generated in the semiconductive tape winding layer, and the thickness is preferably 2 mm or more. When the thickness of the semiconductive plastic layer is thin, the irregularities of the semiconductive tape winding cannot be completely eliminated, and even if there is a slight irregularity, there is a risk of dielectric breakdown from that location. If there is, the danger is eliminated. The thickness of the semiconductive plastic layer constituting the inner semiconductive layer of the cable body can be reduced because it is extruded at a serviced factory, but the thickness should be at least 1.6 mm or more. Preferred for safety. It should be noted that increasing the thickness is not economically preferable, and also causes adverse effects such as an increase in the outer diameter of the cable.
【００１３】本発明において導体相互の接続はＶカット
溶接接続が好ましい。Ｖカット溶接にすることで接続部
の長さを短くすることが可能となり、本発明によりＶカ
ット溶接接続による欠点を内部半導電層でカバーできる
ために、短い接続長さの接続部を提供できるようにな
る。In the present invention, the connection between the conductors is preferably a V-cut welding connection. By using V-cut welding, it is possible to shorten the length of the connection portion, and the present invention can provide a connection portion with a short connection length because the defect caused by the V-cut welding connection can be covered by the internal semiconductive layer. Become like
【００１４】本発明の大容量交流ケーブルによれば、ケ
ーブル導体接続部近傍の内部半導電層を、半導電テープ
の巻き回数を多くし、または半導電プラスチック層の厚
さを増やして厚くすることにより、例えケーブル導体溶
接接続部近傍で導体素線間に緩み（笑い）が生じても、
この緩みを内部半導電層内で吸収して半導電層外表面の
平滑度を損なうことがなくなるため、内部半導電層外表
面に電界集中が起こらず、電気特性を著しく改善でき
る。According to the high-capacity AC cable of the present invention, the internal semiconductive layer in the vicinity of the cable conductor connection portion is made thicker by increasing the number of turns of the semiconductive tape or increasing the thickness of the semiconductive plastic layer. Therefore, even if loosening (laughing) occurs between conductor strands near the cable conductor welding connection,
Since this looseness is not absorbed in the inner semiconductive layer and the smoothness of the outer surface of the semiconductive layer is not impaired, electric field concentration does not occur on the outer surface of the inner semiconductive layer, and the electric characteristics can be remarkably improved.
【００１５】[0015]
【実施例】以下に本発明を実施例により具体的に説明す
る。 実施例１ ３０００ｓｑ（ｍｍ2 ）サイズの導体上に布にカーボン
入りゴムを含浸させた半導電布テープを１／２ラップで
３回巻き（テープの厚さ０．１５ｍｍ、巻きあがりの厚
さ０．９ｍｍ）、次いで導電性カーボンブラック入りエ
チレン酢酸ビニル共重合体で半導電プラスチック層（比
抵抗１×１０3 Ω−ｃｍ）を１．６ｍｍの厚さに、その
外周にポリエチレン絶縁層を２０ｍｍの厚さに、更にそ
の外周に外部半導電層（前記半導電プラスチック層と同
一材料）を３層同時押し出しで製造した長さ２０ｍの交
流ケーブルを２本用意し、この２本のケーブルを図１に
示すように接続した。即ち、両ケーブルの端末から導体
１、１を露出させてＶカット溶接２した。この溶接接続
した導体上に布にカーボン入りゴムを含浸させた半導電
布テープを１／２ラップで４回巻き（巻きあがり厚さ
１．２ｍｍ）その両端をケーブル本体の内部半導電層に
接続して半導電テープ層３を構成した。次に、ケーブル
を接続する前に挿入しておいた熱収縮性未架橋半導電プ
ラスチックチューブを前記半導電テープ層３上に戻して
熱収縮させ布テープと密着させると同時にその両端はケ
ーブル本体の内部半導電層と接続し、厚さ２．０ｍｍの
半導電プラスチック層４を構成した。このようにして構
成した内部半導電層５の外周に金型を覆せて溶融ポリエ
チレンを注入（厚さ２０ｍｍ）、更に外部半導電層を設
けて未架橋内部半導電チューブ４、ポリエチレン絶縁層
６、外部半導電層７を架橋して接続部を完成した。次い
で、金属遮蔽層、保護層を設けて試験用接続ケーブルと
した。The present invention will be specifically described below with reference to examples. Example 1 A semiconductive cloth tape in which cloth was impregnated with carbon-containing rubber was wound on a 3000 sq (mm 2) size conductor three times in 1/2 wraps (tape thickness 0.15 mm, roll thickness 0.1 mm). 9 mm), then a semiconductive plastic layer (resistivity 1 × 10 3 Ω-cm) made of ethylene vinyl acetate copolymer containing conductive carbon black to a thickness of 1.6 mm, and a polyethylene insulating layer of 20 mm thickness around its periphery. Further, two AC cables each having a length of 20 m prepared by simultaneously extruding three layers of an external semiconductive layer (the same material as the semiconductive plastic layer) on the outer periphery thereof are prepared, and these two cables are shown in FIG. Connected as shown. That is, the conductors 1 and 1 were exposed from the ends of both cables, and V-cut welding 2 was performed. A semi-conductive cloth tape in which cloth is impregnated with carbon-containing rubber is wound four times (1/2 roll-up thickness: 1.2 mm) on the welded conductor with 1/2 wrap, and both ends are connected to the inner semi-conductive layer of the cable body. Thus, a semiconductive tape layer 3 was formed. Next, the heat-shrinkable uncrosslinked semiconductive plastic tube inserted before connecting the cable is returned to the semiconductive tape layer 3 to be heat-shrinked and adhered to the cloth tape, and at the same time both ends of the cable body are connected. The semiconductive plastic layer 4 having a thickness of 2.0 mm was connected to the internal semiconductive layer. The outer periphery of the inner semiconductive layer 5 thus constructed is covered with a mold and molten polyethylene is injected (thickness: 20 mm). Further, an outer semiconductive layer is provided to provide an uncrosslinked inner semiconductive tube 4, a polyethylene insulating layer 6, The external semiconductive layer 7 was crosslinked to complete the connection. Next, a metal connection layer and a protection layer were provided to obtain a test connection cable.
【００１６】実施例２〜７、比較例１１、１２ 表１に示すサイズのケーブルを実施例１と同様に製造
し、表１に示す条件で実施例１と同様手法により接続し
た。Examples 2 to 7, Comparative Examples 11 and 12 Cables having the sizes shown in Table 1 were manufactured in the same manner as in Example 1, and were connected in the same manner as in Example 1 under the conditions shown in Table 1.
【００１７】実施例１〜７、比較例１１、１２それぞれ
の接続ケーブルに捩じれ試験を行い、電気特性並びに接
続部近傍における半導電層の状態を観察した。その結果
を表２に示す。Each of the connection cables of Examples 1 to 7 and Comparative Examples 11 and 12 was subjected to a torsion test, and the electrical characteristics and the state of the semiconductive layer near the connection portion were observed. Table 2 shows the results.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】表２から明らかなように、実施例において
は内部半導電層に皺の発生は見られず電気特性も良好で
あったのに対し、比較例１１では内部半導電層に皺が生
じ、インパルス破壊値、ＡＣ破壊値がいずれも本発明の
１／３程度でしかなく、電気特性は著しく低下した。比
較例１２はケーブル本体の内部半導電層を構成する半導
電テープ層の厚さを厚くした例であり、厚くすることで
ケーブル本体側の内部半導電層に小さな皺が見られた
が、電気特性を劣化するまでには至っていなかった。As is clear from Table 2, wrinkles were not observed in the inner semiconductive layer in Example and electric characteristics were good, whereas wrinkles were generated in the inner semiconductive layer in Comparative Example 11. , Impulse breakdown value and AC breakdown value were only about 1/3 of the present invention, and the electrical characteristics were remarkably deteriorated. Comparative Example 12 is an example in which the thickness of the semiconductive tape layer constituting the internal semiconductive layer of the cable main body was increased. By increasing the thickness, small wrinkles were observed in the internal semiconductive layer on the cable main body side. The properties were not deteriorated.
【００２１】[0021]
【発明の効果】以上の結果より少なくとも導体接続部近
傍の内部半導電層の厚さを接続されるケーブル導体の捩
じれに対処できる半導電テープ巻き数および／または半
導電プラスチック層の厚さを増加して施すことにより、
大容量交流ケーブルの電気特性を大幅に改善した超長尺
ケーブルを提供することができる。From the above results, at least the thickness of the inner semiconductive layer near the conductor connection portion is increased by increasing the number of turns of the semiconductive tape and / or the thickness of the semiconductive plastic layer which can cope with the twist of the cable conductor to be connected. By applying
It is possible to provide an ultra-long cable in which the electrical characteristics of a large-capacity AC cable are significantly improved.
【図１】図１は本発明の一実施態様を示す説明図であ
る。FIG. 1 is an explanatory diagram showing one embodiment of the present invention.
１ ケーブル導体 ２ Ｖカット溶接部 ３ 半導電テープ層 ４ 半導電プラスチック層 ５ 内部半導電層 ６ 絶縁層 ７ 外部半導電層 DESCRIPTION OF SYMBOLS 1 Cable conductor 2 V cut welding part 3 Semi-conductive tape layer 4 Semi-conductive plastic layer 5 Inner semi-conductive layer 6 Insulating layer 7 External semi-conductive layer
Claims (7)
チック層とで内部半導電層を構成し、該内部半導電層の
外周にプラスチック絶縁層、外部半導電層を設けてなる
プラスチック絶縁交流ケーブル複数本を接続してなる長
尺の交流ケーブルにおいて、少なくとも導体が接続され
ている箇所近傍の内部半導電層の厚さを３ｍｍ以上とし
たことを特徴とするプラスチック絶縁長尺交流ケーブ
ル。1. A plastic insulating AC comprising an inner semiconductive layer formed of a semiconductive tape layer and a semiconductive plastic layer on a conductor, and a plastic insulating layer and an outer semiconductive layer provided around the inner semiconductive layer. A plastic-insulated long AC cable, comprising a long AC cable formed by connecting a plurality of cables, wherein the thickness of the internal semiconductive layer at least in the vicinity of the location where the conductor is connected is 3 mm or more.
チック層とで内部半導電層を構成し、該内部半導電層の
外周にプラスチック絶縁層、外部半導電層を設けて成る
プラスチック絶縁交流ケーブル複数本を接続してなる長
尺の交流ケーブルにおいて、導体が接続されている箇所
近傍の前記半導電テープ層と半導電プラスチック層の厚
さの合計が３ｍｍ以上であり、接続部の存在しない部分
の半導電テープ層と半導電プラスチック層の厚さの合計
が２．５ｍｍ以上であることを特徴とするプラスチック
絶縁長尺交流ケーブル。2. A plastic insulating AC comprising an inner semiconductive layer formed by a semiconductive tape layer and a semiconductive plastic layer on a conductor, and a plastic insulating layer and an outer semiconductive layer provided around the inner semiconductive layer. In a long AC cable formed by connecting a plurality of cables, the total thickness of the semiconductive tape layer and the semiconductive plastic layer near the location where the conductor is connected is 3 mm or more, and there is no connection portion. A plastic insulated long AC cable, wherein the total thickness of the semiconductive tape layer and the semiconductive plastic layer in a portion is 2.5 mm or more.
あって、少なくとも導体が接続されている箇所近傍に設
ける半導電テープ層は半導電テープが３回以上巻回され
ていることを特徴とするプラスチック絶縁長尺交流ケー
ブル。3. The AC cable according to claim 1, wherein the semiconductive tape layer provided at least in the vicinity of a portion where the conductor is connected has a semiconductive tape wound three or more times. Plastic insulated long AC cable.
あって、少なくとも導体が接続されている箇所近傍に設
ける半導電プラスチック層が２ｍｍ以上の厚さであるこ
とを特徴とするプラスチック絶縁長尺交流ケーブル。4. The plastic cable according to claim 1, wherein the semiconductive plastic layer provided at least in the vicinity of a portion to which the conductor is connected has a thickness of 2 mm or more. AC cable.
あって、少なくとも導体が接続されている箇所近傍に設
ける半導電テープ層は半導電テープが３回以上巻回さ
れ、半導電プラスチック層が２ｍｍ以上の厚さであるこ
とを特徴とするプラスチック絶縁長尺交流ケーブル。5. The AC cable according to claim 1, wherein the semiconductive tape layer provided at least in the vicinity of a portion where the conductor is connected is formed by winding a semiconductive tape three or more times, and A plastic insulated long AC cable having a thickness of 2 mm or more.
あって、導体が接続されている箇所近傍の前記半導電プ
ラスチック層の厚さが２ｍｍ以上であり、接続部の存在
しない部分の半導電プラスチック層の厚さが１．６ｍｍ
以上であることを特徴とするプラスチック絶縁長尺交流
ケーブル。6. The AC cable according to claim 1, wherein the thickness of the semiconductive plastic layer in the vicinity of the place where the conductor is connected is 2 mm or more, and the semiconductive material in a portion where no connection exists. 1.6mm thick plastic layer
A plastic insulated long AC cable characterized by the above.
ケーブルであって、導体相互の接続がＶカット溶接で接
続されていることを特徴とするプラスチック絶縁長尺交
流ケーブル。7. The plastic insulated long AC cable according to claim 1, wherein the conductors are connected by V-cut welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1553297A JPH10214524A (en) | 1997-01-29 | 1997-01-29 | Plastic insulated long ac cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1553297A JPH10214524A (en) | 1997-01-29 | 1997-01-29 | Plastic insulated long ac cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10214524A true JPH10214524A (en) | 1998-08-11 |
Family
ID=11891431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1553297A Pending JPH10214524A (en) | 1997-01-29 | 1997-01-29 | Plastic insulated long ac cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10214524A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008300093A (en) * | 2007-05-30 | 2008-12-11 | Viscas Corp | Dc coaxial power cable |
-
1997
- 1997-01-29 JP JP1553297A patent/JPH10214524A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008300093A (en) * | 2007-05-30 | 2008-12-11 | Viscas Corp | Dc coaxial power cable |
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