JPH11111071A - Submarine power cable - Google Patents
Submarine power cableInfo
- Publication number
- JPH11111071A JPH11111071A JP27463897A JP27463897A JPH11111071A JP H11111071 A JPH11111071 A JP H11111071A JP 27463897 A JP27463897 A JP 27463897A JP 27463897 A JP27463897 A JP 27463897A JP H11111071 A JPH11111071 A JP H11111071A
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- cable
- outer conductor
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Abstract
(57)【要約】
【課題】 従来の電力同軸ケーブルの外部導体の工場同
径接続（ＦＪ）において、接続時の熱によりケーブル絶
縁コアに損傷を与える恐れがあった。本発明は、ＦＪ可
能であって、送電容量向上に最適な海底電力同軸ケーブ
ルを提供することを目的としている。
【解決手段】 海底電力同軸ケーブルの絶縁コア上に、
ケーブル導体断面積の６０〜９０％の断面積とする外部
導体を多数の銅線をＳＺ巻きすることにより形成され、
その上に外部導体として必要な絶縁処理を施しているこ
とを特徴としている。
(57) [Summary] [PROBLEMS] In a conventional same diameter connection (FJ) of an outer conductor of a power coaxial cable, heat at the time of connection may damage a cable insulating core. An object of the present invention is to provide a submarine power coaxial cable that is FJ-capable and is optimal for improving transmission capacity. SOLUTION: On the insulating core of the submarine power coaxial cable,
An outer conductor having a cross-sectional area of 60 to 90% of a cable conductor cross-sectional area is formed by winding a large number of copper wires in an SZ manner,
It is characterized in that necessary insulation treatment as an external conductor is performed thereon.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、帰路外部導体を有
する同軸海底ＣＶケーブルに適用され、外部導体の巻き
方をＳＺ巻き構造を採用した海底電力同軸ケーブルに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submarine power coaxial cable which is applied to a coaxial submarine CV cable having a return outer conductor and employs an SZ winding structure for winding the outer conductor.
【０００２】[0002]
【従来の技術】帰路導体を有する陸上用ＣＶケーブルの
外部導体は同心撚り巻きで構成している。2. Description of the Related Art The outer conductor of a terrestrial CV cable having a return conductor is formed by concentric twisted winding.
【０００３】一般に電力ケーブルは製造設備能力、運搬
上の重量、大きさ等の制限により有限長しか製造出来
ず、一方海底ケーブルでは、総必要長を接続して船積し
て然る後布設するため、ケーブルをフレキシブルジョイ
ントである同径の工場ジョイント（以下ＦＪという）が
必要である。[0003] Generally, power cables can be manufactured only in a finite length due to the limitations of manufacturing equipment capacity, transportation weight, size, etc. On the other hand, in the case of submarine cables, the total required length is connected and loaded, and then laid. In addition, a factory joint (hereinafter referred to as FJ) having the same diameter as a flexible joint is required for the cable.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
電力同軸ケーブル外部導体の同心撚り巻きではＦＪの施
工が困難であった。However, it has been difficult to construct the FJ by the conventional concentric twisting of the power coaxial cable outer conductor.
【０００５】すなわち、ＦＪにおいて従来の同心撚り巻
き構造の場合、ＣＶケーブル絶縁コア外部半導電層上で
外部導体の素線一本づつ接続せねばならず、接続時の熱
の為め、ケーブル絶縁コアに熱的な損傷を及ぼす。That is, in the case of the conventional concentric twisted winding structure in the FJ, the wires of the outer conductor must be connected one by one on the outer semiconductive layer of the CV cable insulating core. Causes thermal damage to the core.
【０００６】そこで外部導体素線をケーブル絶縁コアか
ら離して接続し、接続（溶接）後、元に戻せる構造にす
る必要があり、外部導体はＳＺ巻きにする必要がある。[0006] Therefore, it is necessary to connect the outer conductor strand away from the cable insulating core, and to make the structure returnable after connection (welding), and the outer conductor must be wound in SZ.
【０００７】本発明は、上記事情を考慮してなされたも
ので、その目的とするところは、ＦＪ可能な送電容量向
上に最適な海底電力同軸ケーブルを提供することにあ
る。[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a submarine power coaxial cable which is optimal for improving the transmission capacity capable of FJ.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明に係る海底電力同軸ケーブルは、中心の導
体の外周に、内部半導電層と、絶縁体と、外部半導電層
とを順次設けてなるケーブル絶縁コア上に、外部導体を
多数の銅線をＳＺ巻きすることにより形成され、その上
に外部導体として必要な絶縁処理を施して形成されてい
ることを特徴としている。In order to achieve the above object, a submarine power coaxial cable according to the present invention comprises an inner semiconductive layer, an insulator, and an outer semiconductive layer around a center conductor. The outer conductor is formed by winding a large number of copper wires by SZ winding on a cable insulating core in which the outer conductors are sequentially provided, and the outer conductor is formed by performing necessary insulation treatment as the outer conductor.
【０００９】また、上記外部導体断面積が、中心導体断
面積の６０％〜９０％であることを特徴としている。[0009] The cross section of the outer conductor is preferably 60% to 90% of the cross section of the center conductor.
【００１０】さらにまた、上記外部導体の線径が３ｍｍ
〜８ｍｍであることを特徴としている。Further, the wire diameter of the outer conductor is 3 mm.
８8 mm.
【００１１】上記の構成を有する本発明においては、海
底電力同軸ケーブルの外部導体銅線の撚り方向をＳＺ巻
きとしているので、ＦＪにおいて外部導体の接続は、前
記銅線の撚りをケーブル絶縁コアから離して溶接接続
し、溶接接続後前記銅線の撚りをケーブル絶縁コア上に
収めることが出来る。In the present invention having the above configuration, the twisting direction of the outer conductor copper wire of the submarine power coaxial cable is SZ winding. Therefore, in the FJ, the connection of the outer conductor is made by twisting the copper wire from the cable insulating core. After the welding connection, the twist of the copper wire can be stored on the cable insulating core.
【００１２】したがって、接続時の熱の為めケーブル絶
縁コアに与える熱的損傷を確実に防止することができ
る。Therefore, it is possible to reliably prevent thermal damage to the cable insulating core due to heat at the time of connection.
【００１３】また、外部導体断面積が中心導体断面積の
６０〜９０％の断面積としているので、下記の理由によ
り直流ケーブル送電容量増大に最適な外部導体断面積と
することができる。Further, since the outer conductor has a cross-sectional area of 60 to 90% of the center conductor cross-sectional area, the outer conductor can have an optimum cross-sectional area for increasing the DC cable transmission capacity for the following reasons.
【００１４】直流ケーブルの外部導体は、ケーブル導体
と同一の逆向きの帰路電流が流れるのであるから基本的
には中心導体と同じ断面積を必要とするわけであるが、
ケーブル構造上外部導体と中心導体とからの熱放散の熱
抵抗の違いから、外部導体の断面積は中心導体の断面積
より小さくてよい。Since the outer conductor of the DC cable carries a return current in the same reverse direction as the cable conductor, it basically requires the same cross-sectional area as the center conductor.
The cross-sectional area of the outer conductor may be smaller than the cross-sectional area of the center conductor due to the difference in thermal resistance of heat dissipation from the outer conductor and the center conductor due to the cable structure.
【００１５】導体断面積＋外部導体断面積＝一定とした
とき、最適な、つまり最大電流を流すことができる導体
断面積と外部導体断面積比は環境条件により０．６〜
０．９の範囲内である。When the sectional area of the conductor and the sectional area of the outer conductor are fixed, the ratio of the sectional area of the conductor and the sectional area of the outer conductor which is optimal, that is, the maximum current can flow, is 0.6 to 0.6 depending on the environmental conditions.
0.9.
【００１６】さらにまた、外部導体線径が３〜８ｍｍで
あっても、従来の同心撚り巻きではＦＪの外部導体接続
が不可能であったが、上記の本発明のＳＺ巻きとするこ
とによりＦＪの外部導体接続を可能とすることができ
る。Further, even if the outer conductor wire diameter is 3 to 8 mm, the connection of the outer conductor of the FJ cannot be performed by the conventional concentric twist winding, but the FZ is formed by the above-mentioned SZ winding of the present invention. Can be connected to the external conductor.
【００１７】[0017]
【発明の実施の形態】以下、本発明の実施形態を図面に
基づいて説明する。図１および図２は本発明に係る海底
電力同軸ケーブルの一実施形態を示す。図に示すよう
に、海底電力同軸ケーブル１はケーブル導体２に内部半
導電層３、架橋ポリエチレン絶縁体層４、外部半導電層
５が順次設けられ、通常内部半導電層３、架橋ポリエチ
レン絶縁体層４および外部半導電層５は同時押出法によ
り形成され、内部半導電層３と架橋ポリエチレン絶縁体
層４との間、ならびに架橋ポリエチレン絶縁体層４と外
部半導電層５との間は一体化されている。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of a submarine power coaxial cable according to the present invention. As shown in the figure, a submarine power coaxial cable 1 is provided with an inner semiconductive layer 3, a crosslinked polyethylene insulator layer 4, and an outer semiconductive layer 5 in that order on a cable conductor 2, and usually has an inner semiconductive layer 3, a crosslinked polyethylene insulator. The layer 4 and the outer semiconductive layer 5 are formed by a co-extrusion method, and the inner semiconductive layer 3 and the crosslinked polyethylene insulator layer 4 and the crosslinked polyethylene insulator layer 4 and the outer semiconductive layer 5 are integrally formed. Has been
【００１８】外部半導電層５の外周には多数の銅線から
なる外部導体６が設けられ、この外部導体６は線径３．
０ｍｍ〜８．０ｍｍの銅線をケーブルコアの外周にＳＺ
巻きすることにより形成されている。また、この外部導
体の総断面積は、ケーブル導体２の断面積の６０〜９０
％の断面積に設定されている。これは中心導体断面積と
外部導体断面積の和が一定とした場合の直流ケーブル送
電容量増大に適した断面積割合である。An outer conductor 6 made of a large number of copper wires is provided on the outer periphery of the outer semiconductive layer 5, and the outer conductor 6 has a wire diameter of 3.
A copper wire of 0mm to 8.0mm is SZ around the outer circumference of the cable core.
It is formed by winding. The total cross-sectional area of the outer conductor is 60 to 90 times the cross-sectional area of the cable conductor 2.
% Cross-sectional area. This is a sectional area ratio suitable for increasing the DC cable transmission capacity when the sum of the center conductor sectional area and the outer conductor sectional area is constant.
【００１９】さらに、その上に、半導電層７を介して外
部導体６の絶縁層としてポリエチレン絶縁体層８が設け
られ、その上に鉛被９、防食層１０、鉄線鎧装１１を施
されている。Further, a polyethylene insulator layer 8 is provided thereon as an insulating layer of the outer conductor 6 with a semiconductive layer 7 interposed therebetween, and a lead coating 9, a corrosion protection layer 10, and an iron wire armor 11 are provided thereon. ing.
【００２０】次に、本発明の特徴である上記外部導体６
の作用について説明する。Next, the outer conductor 6 which is a feature of the present invention is described.
The operation of will be described.
【００２１】従来の外部導体は図４に示すように外部導
体１６はケーブル絶縁コア１００の外周に銅線を同心撚
りして巻かれていた。As shown in FIG. 4, a conventional outer conductor is formed by winding a copper wire concentrically around the outer periphery of a cable insulating core 100 as shown in FIG.
【００２２】ＦＪに於て銅線を接続する場合、図４
（イ）に示すケーブル絶縁コア１００上にてケーブル軸
に沿って各銅線を溶接（銅ろうまたは、銀ろう）接続す
るか、図４（ロ）に示すケーブル絶縁コア１００上にて
ケーブル周りに沿って各銅線を溶接接続していた。When connecting a copper wire in the FJ, FIG.
Each of the copper wires is connected by welding (copper brazing or silver brazing) along the cable axis on the cable insulating core 100 shown in (a) or around the cable on the cable insulating core 100 shown in FIG. Along with each copper wire was welded.
【００２３】その結果、接続時の熱の為、ケーブル絶縁
コア１００に熱的損傷を及ぼすことになる。As a result, the cable insulation core 100 is thermally damaged due to heat at the time of connection.
【００２４】ちなみに、銅線の接続は銅ろう、又は銀ろ
う接続であり、その温度は２００℃以上となり絶縁体の
架橋ポリエチレンの融点を越える。Incidentally, the connection of the copper wire is a copper brazing or silver brazing connection, the temperature of which is 200 ° C. or more, which exceeds the melting point of the crosslinked polyethylene of the insulator.
【００２５】本発明の外部導体は撚り方向をＳＺ巻きと
しているので、ＦＪにおいて銅線を接続する場合、図３
に示すように、外部導体６の銅線をケーブル絶縁コアか
ら離して溶接接続を行い、溶接接続後ケーブル絶縁コア
上に収める（図面の裏面点線の位置に収める）ことがで
きる。Since the twisting direction of the outer conductor of the present invention is SZ winding, when connecting a copper wire in the FJ, FIG.
As shown in (5), the copper wire of the outer conductor 6 can be welded and connected apart from the cable insulating core, and can be housed on the cable insulating core after the welding connection (it can be housed at the position indicated by the dotted line on the back side of the drawing).
【００２６】従って、溶接接続時の熱の影響をケーブル
絶縁コアに及ぼすことはない。Therefore, the effect of heat at the time of welding connection is not exerted on the cable insulating core.
【００２７】なお、この外部導体は直流ＣＶケーブルの
場合は中性線として、交流ＣＶケーブルの場合は帰路電
流用または、充電電流用として使用される。The outer conductor is used as a neutral wire in the case of a DC CV cable, and used for a return current or a charging current in the case of an AC CV cable.
【００２８】直流ケーブルの場合、中心導体と外部導体
に逆向きに同一の電流が流れる。従って、外部導体は、
基本的には中心導体と同じ断面積となるが、ケーブル構
造上中心導体と外部導体とからの熱放散の熱抵抗の違い
から、最適外部導体の断面積は中心導体の断面積より小
さくてよい。その最適断面積比を図５に示す。In the case of a DC cable, the same current flows through the center conductor and the outer conductor in opposite directions. Therefore, the outer conductor
Basically, it has the same cross-sectional area as the center conductor.However, due to the difference in thermal resistance of heat dissipation from the center conductor and the outer conductor due to the cable structure, the cross-sectional area of the optimal outer conductor may be smaller than the cross-sectional area of the center conductor. . FIG. 5 shows the optimum cross-sectional area ratio.
【００２９】図５を求めた計算過程を示すと、直流ケー
ブルにおいて、次の式が成立する。Referring to FIG. 5, the following equation is established for a DC cable.
【数１】 ｒ1 ，ｒ2 の温度特性を無視すれば、導体断面積を
Ａ1 、外部導体断面積をＡ2 として、(Equation 1) If the temperature characteristics of r 1 and r 2 are ignored, the conductor cross-sectional area is A 1 , and the outer conductor cross-sectional area is A 2 .
【数２】 とおいて計算すると（２）式となる。(Equation 2) Then, equation (2) is obtained.
【００３０】[0030]
【数３】 （２）式において、Ｉを最大とする為めには、ΔＴ，Ａ
0 ，Ｋ，Ｒ1 は一定であるからｆ（ｘ）を最小とするｘ
であればよい。(Equation 3) In the equation (2), in order to maximize I, ΔT, A
0, K, R 1 is f (x) is the smallest is constant x
Should be fine.
【００３１】すなわち、導体断面積＋外部導体断面積＝
一定として、外部絶縁体熱抵抗（防食層、土壌等熱抵抗
含む）とケーブル絶縁体熱抵抗との比に対して、最適外
部導体断面積比は０．６〜０．９である。上記熱抵抗の
比はケーブル布設環境により変り標準としてこの熱抵抗
比は２程度とされている。That is, conductor sectional area + outer conductor sectional area =
As a constant, the optimum external conductor cross-sectional area ratio is 0.6 to 0.9 with respect to the ratio between the thermal resistance of the external insulator (including the thermal resistance of the anticorrosion layer and the soil) and the thermal resistance of the cable insulator. The heat resistance ratio varies depending on the cable installation environment, and the heat resistance ratio is about 2 as a standard.
【００３２】[0032]
【発明の効果】以上説明したように、本発明に係る海底
電力同軸ケーブルによれば、海底電力同軸ケーブルのＦ
Ｊの施工が容易であり、ＦＪ部のケーブル機械特性が向
上する。As described above, according to the submarine power coaxial cable according to the present invention, the submarine power coaxial cable F
Construction of J is easy, and the cable mechanical properties of the FJ part are improved.
【００３３】特に、外部導体の線径３．０ｍｍ〜８．０
ｍｍでは従来の同心撚り巻きで溶接接続の熱影響が大き
くＦＪができなかったが、本発明のＳＺ巻き外部導体に
よりＦＪの有効性を一段と発揮できる。In particular, the wire diameter of the outer conductor is 3.0 mm to 8.0.
mm, the thermal effect of the welding connection was large due to the conventional concentric twist winding, and FJ could not be performed. However, the effectiveness of FJ can be further exhibited by the SZ-wound outer conductor of the present invention.
【００３４】また、外部導体断面積を導体断面積の６０
〜９０％としているので、特に直流ＣＶケーブル送電容
量増大に有効である。The outer conductor cross-sectional area is set to 60 times the conductor cross-sectional area.
Since it is set to 90%, it is particularly effective for increasing the transmission capacity of the DC CV cable.
【図１】本発明に係る海底電力同軸ケーブルの一実施形
態を示すケーブルの断面図である。FIG. 1 is a sectional view of a cable showing one embodiment of a submarine power coaxial cable according to the present invention.
【図２】図１に示す海底電力同軸ケーブルの構造を示す
斜視図である。FIG. 2 is a perspective view showing the structure of the submarine power coaxial cable shown in FIG.
【図３】本発明に係る海底電力同軸ケーブルの外部導体
のＦＪにおける接続状態を示す説明図である。FIG. 3 is an explanatory diagram showing a connection state at an FJ of an outer conductor of the submarine power coaxial cable according to the present invention.
【図４】従来の電力同軸ケーブル外部導体のＦＪにおけ
る接続状態を示す説明図である。FIG. 4 is an explanatory diagram showing a connection state of a conventional power coaxial cable outer conductor at an FJ.
【図５】本発明に係る直流ケーブルの最適な外部導体断
面積の導体断面積比を示すグラフである。FIG. 5 is a graph showing a conductor cross-sectional area ratio of an optimum external conductor cross-sectional area of the DC cable according to the present invention.
１ 海底電力同軸ケーブル ２ ケーブル導体 ４ ケーブル絶縁体層 ６，１６ 外部導体 ８ 絶縁体層 ９ 鉛被 １０ 防食層 １１ 鉄線鎧装 １００ ケーブル絶縁コア DESCRIPTION OF SYMBOLS 1 Submarine power coaxial cable 2 Cable conductor 4 Cable insulator layer 6, 16 Outer conductor 8 Insulator layer 9 Lead covering 10 Corrosion protection layer 11 Iron wire armoring 100 Cable insulation core
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【手続補正書】[Procedure amendment]
【提出日】平成９年１１月１８日[Submission date] November 18, 1997
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】発明の名称[Correction target item name] Name of invention
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【発明の名称】 海底電力ケーブル[Title of the Invention] Submarine power cable
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００１[Correction target item name] 0001
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００１】[0001]
【発明の属する技術分野】本発明は、帰路外部導体を有
する同軸海底ＣＶケーブルに適用され、外部導体の巻き
方をＳＺ巻き構造を採用した海底電力ケーブル（海底電
力同軸ケーブルとも称される）に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submarine power cable (also referred to as a submarine power coaxial cable) which is applied to a coaxial submarine CV cable having a return outer conductor and employs an SZ winding structure for winding the outer conductor. .
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平澤 隆行 東京都江東区木場１−５−１ 株式会社フ ジクラ内 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takayuki Hirasawa 1-5-1 Kiba, Koto-ku, Tokyo Inside Fujikura Co., Ltd.
Claims (3)
絶縁体と、外部半導電層とを順次設けてなるケーブル絶
縁コア上に、外部導体を多数の銅線をＳＺ巻きすること
により形成され、その上に外部導体として必要な絶縁処
理を施して形成されていることを特徴とする海底電力同
軸ケーブル。1. An inner semiconductive layer on the outer periphery of a central conductor,
An outer conductor is formed by winding a large number of copper wires by SZ winding on a cable insulating core in which an insulator and an outer semiconductive layer are sequentially provided, and formed thereon by performing necessary insulation processing as an outer conductor. A submarine power coaxial cable characterized in that:
６０〜９０％であることを特徴とする請求項１記載の海
底電力同軸ケーブル。2. The submarine power coaxial cable according to claim 1, wherein the outer conductor cross-sectional area is 60 to 90% of the center conductor cross-sectional area.
あることを特徴とする請求項１記載の海底電力同軸ケー
ブル。3. The submarine power coaxial cable according to claim 1, wherein said outer conductor has a wire diameter of 3 mm to 8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27463897A JPH11111071A (en) | 1997-10-07 | 1997-10-07 | Submarine power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27463897A JPH11111071A (en) | 1997-10-07 | 1997-10-07 | Submarine power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11111071A true JPH11111071A (en) | 1999-04-23 |
Family
ID=17544499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27463897A Pending JPH11111071A (en) | 1997-10-07 | 1997-10-07 | Submarine power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11111071A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007059085A (en) * | 2005-08-22 | 2007-03-08 | Viscas Corp | Coaxial cable for bipolar DC power transmission |
| JP2007325442A (en) * | 2006-06-02 | 2007-12-13 | Viscas Corp | DC coaxial cable connection for power |
| JP2007325441A (en) * | 2006-06-02 | 2007-12-13 | Viscas Corp | Return conductor connection method for DC coaxial cable for electric power |
| JP2007325440A (en) * | 2006-06-02 | 2007-12-13 | Viscas Corp | Return conductor connection method for DC coaxial cable for electric power |
| WO2007142069A1 (en) | 2006-06-02 | 2007-12-13 | Viscas Corporation | Method for connecting return conductors of power supply dc coaxial cables and connection portion between power supply dc coaxial cables |
| CN110781563A (en) * | 2019-09-25 | 2020-02-11 | 重庆泰山电缆有限公司 | Cable core section design method, conductor assembly, cable core and cable |
| CN112397222A (en) * | 2019-08-15 | 2021-02-23 | 中天科技海缆股份有限公司 | Submarine optical cable |
-
1997
- 1997-10-07 JP JP27463897A patent/JPH11111071A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007059085A (en) * | 2005-08-22 | 2007-03-08 | Viscas Corp | Coaxial cable for bipolar DC power transmission |
| JP2007325442A (en) * | 2006-06-02 | 2007-12-13 | Viscas Corp | DC coaxial cable connection for power |
| JP2007325441A (en) * | 2006-06-02 | 2007-12-13 | Viscas Corp | Return conductor connection method for DC coaxial cable for electric power |
| JP2007325440A (en) * | 2006-06-02 | 2007-12-13 | Viscas Corp | Return conductor connection method for DC coaxial cable for electric power |
| WO2007142069A1 (en) | 2006-06-02 | 2007-12-13 | Viscas Corporation | Method for connecting return conductors of power supply dc coaxial cables and connection portion between power supply dc coaxial cables |
| EP3096427A1 (en) | 2006-06-02 | 2016-11-23 | Viscas Corporation | Connection of return conductors in a connecting portion of power direct-current coaxial cable |
| CN112397222A (en) * | 2019-08-15 | 2021-02-23 | 中天科技海缆股份有限公司 | Submarine optical cable |
| CN110781563A (en) * | 2019-09-25 | 2020-02-11 | 重庆泰山电缆有限公司 | Cable core section design method, conductor assembly, cable core and cable |
| CN110781563B (en) * | 2019-09-25 | 2023-03-31 | 重庆泰山电缆有限公司 | Cable core section design method, conductor assembly, cable core and cable |
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