JP2000030546A - Stranded wire structure of electric power cable - Google Patents
Stranded wire structure of electric power cableInfo
- Publication number
- JP2000030546A JP2000030546A JP10198805A JP19880598A JP2000030546A JP 2000030546 A JP2000030546 A JP 2000030546A JP 10198805 A JP10198805 A JP 10198805A JP 19880598 A JP19880598 A JP 19880598A JP 2000030546 A JP2000030546 A JP 2000030546A
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- segment
- power cable
- strands
- twist pitch
- 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.)
- Withdrawn
Links
- 239000004020 conductor Substances 0.000 claims abstract description 119
- 230000008602 contraction Effects 0.000 abstract description 6
- 241000270295 Serpentes Species 0.000 abstract description 4
- 239000011295 pitch Substances 0.000 description 49
- 238000010586 diagram Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、分割成形導体を有
する電力ケーブルの撚線構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stranded structure of a power cable having a divided molded conductor.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】一般
に、ＣＶケーブル（架橋ポリエチレン電力ケーブル）、
ＯＦケーブル（油入り電力ケーブル）等の導体は、その
サイズが大サイズ、例えば８００〜１０００mm2以上と
なる場合には、圧縮成形導体であるセグメント導体を撚
り合わした分割成形導体が用いられる。このような分割
成形導体に通電すると、ジュール熱により発熱して当該
分割成形導体の温度が上昇する。この際、分割成形導体
の各セグメント導体を構成する素線の撚りピッチが同一
なので、各セグメント導体はほぼ同じように熱膨張して
長手方向に伸びることが知られている。したがって、電
力ケーブル自体が長手方向に伸びることになる。BACKGROUND OF THE INVENTION Generally, CV cables (crosslinked polyethylene power cables),
When a conductor such as an OF cable (oil-containing power cable) has a large size, for example, 800 to 1000 mm 2 or more, a split molded conductor obtained by twisting a segment conductor that is a compression molded conductor is used. When such a divided molded conductor is energized, heat is generated by Joule heat and the temperature of the divided molded conductor rises. At this time, it is known that since the twist pitches of the wires constituting each segment conductor of the divided molded conductor are the same, each segment conductor thermally expands in substantially the same manner and extends in the longitudinal direction. Therefore, the power cable itself extends in the longitudinal direction.
【０００３】このような分割成形導体が用いられる電力
ケーブルを地中に布設する場合には、図４に示すよう
に、マンホール５０内に電力ケーブル６０の伸び出しを
吸収するためのオフセット部５１を設ける必要があっ
た。そのため、マンホール５０は大きくなり、非常に費
用がかかるという難点があった。また、マンホール５０
内のオフセット部５１を小さくするには、スネーク布設
しなければならなかった。When laying a power cable using such a divided molded conductor underground, as shown in FIG. 4, an offset portion 51 for absorbing the extension of the power cable 60 is provided in a manhole 50. It had to be provided. For this reason, the manhole 50 becomes large and there is a problem that it is very expensive. In addition, manhole 50
In order to reduce the offset portion 51 in the inside, it was necessary to lay a snake.
【０００４】本発明はこのような従来の難点を解決する
ためになされたもので、マンホールを小さくすることが
でき、而もスネーク布設を小さく又は不要にすることが
できる電力ケーブルの撚線構造を提供することを目的と
する。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and there is provided a stranded wire structure of a power cable capable of reducing manholes and reducing or eliminating snake installation. The purpose is to provide.
【０００５】[0005]
【課題を解決するための手段】このような目的を達成す
る本発明の電力ケーブルの撚線構造は、分割成形導体を
有する電力ケーブルの撚線構造において、分割成形導体
の少なくとも１つのセグメント導体を構成する素線の撚
りピッチが他のセグメント導体を構成する素線の撚りピ
ッチと異なるものである。A stranded wire structure of a power cable according to the present invention which achieves the above object is a stranded wire structure of a power cable having a divided molded conductor, wherein at least one segment conductor of the divided molded conductor is provided. The twist pitch of the constituent wires is different from the twist pitch of the wires forming the other segment conductors.
【０００６】このような電力ケーブルの撚線構造によれ
ば、分割成形導体に通電すると、ジュール熱により発熱
して熱膨張するが、素線の撚りピッチの異なるセグメン
ト導体同士が撚り合わされているので、熱膨張による伸
び具合が変わってくる。これにより、分割成形導体は螺
旋状に捩れることになる。したがって、電力ケーブルの
熱伸縮を小さくすることができる。[0006] According to such a stranded structure of the power cable, when the divided molded conductor is energized, heat is generated by Joule heat and thermally expanded. However, since the segment conductors having different twist pitches of the strands are twisted together. However, the degree of elongation due to thermal expansion changes. As a result, the divided molded conductor is spirally twisted. Therefore, thermal expansion and contraction of the power cable can be reduced.
【０００７】また、本発明の電力ケーブルの撚線構造に
よれば、分割成形導体を有する電力ケーブルの撚線構造
において、分割成形導体の少なくとも１つのセグメント
導体を構成する複数の層のうちの何れか１つの層の素線
の撚りピッチが、他のセグメント導体を構成する複数の
層のうちの１つのセグメント導体の１つの層と同じ１つ
の層の素線の撚りピッチと異なるものである。また、１
つの層はセグメント導体の最外層であることが好まし
い。このような電力ケーブルの撚線構造によれば、分割
成形導体に通電すると、ジュール熱により発熱して熱膨
張するが、素線の撚りピッチの異なる層を有する分割成
形導体同士が撚り合わされているので、熱膨張による伸
び具合が変わってくる。これにより、分割成形導体は螺
旋状に捩れることになる。したがって、電力ケーブルの
熱伸縮を小さくすることができる。特に、この螺旋状の
捩れは、セグメント導体の最外層の撚りピッチを変える
と顕著に現れる。Further, according to the twisted wire structure of the power cable of the present invention, in the twisted wire structure of the power cable having the divided molded conductor, any one of the plurality of layers constituting at least one segment conductor of the divided molded conductor is used. The twist pitch of the strand of the one layer is different from the twist pitch of the strand of the same one layer as one layer of one of the plurality of layers constituting the other segment conductor. Also, 1
Preferably, one layer is the outermost layer of the segment conductor. According to such a stranded structure of a power cable, when electricity is supplied to the divided molded conductors, heat is generated by Joule heat and thermally expanded, but the divided molded conductors having layers having different twist pitches of the strands are twisted together. Therefore, the degree of elongation due to thermal expansion changes. As a result, the divided molded conductor is spirally twisted. Therefore, thermal expansion and contraction of the power cable can be reduced. In particular, this helical twist appears remarkably when the twist pitch of the outermost layer of the segment conductor is changed.
【０００８】また、本発明の電力ケーブルの撚線構造に
おいて少なくとも１つのセグメント導体の素線の撚りピ
ッチは、他のセグメント導体の素線の撚りピッチの１，
５〜２倍であることが好ましい。これにより、螺旋状の
捩れの径の大きさを小さくすることが可能になる。Further, in the twisted wire structure of the power cable of the present invention, the twist pitch of the strands of at least one segment conductor is one of the twist pitches of the strands of the other segment conductors.
Preferably it is 5 to 2 times. Thereby, it becomes possible to reduce the magnitude of the diameter of the spiral torsion.
【０００９】[0009]
【発明の実施の形態】以下、本発明の電力ケーブルの撚
線構造の実施の一形態を参照して説明する。本発明の撚
線構造が適用される電力ケーブルとしては、例えば図１
（ａ）、（ｂ）に示すように、断面積が２０００mm2以
上の導体２に内部半導電層３を介して架橋ポリエチレン
から成る絶縁体４を被覆し、さらに外部半導電層５、ワ
イヤーシールド６および押えテープ７を介してビニルシ
ース８で被覆したＣＶケーブル１が用いられる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a stranded structure of a power cable according to the present invention will be described with reference to an embodiment. As a power cable to which the stranded structure of the present invention is applied, for example, FIG.
As shown in (a) and (b), a conductor 2 having a cross-sectional area of 2000 mm 2 or more is covered with an insulator 4 made of crosslinked polyethylene via an inner semiconductive layer 3, and further, an outer semiconductive layer 5, a wire shield A CV cable 1 covered with a vinyl sheath 8 via a holding tape 6 and a holding tape 7 is used.
【００１０】このＣＶケーブル１の導体２には、扇型圧
縮成形導体である５つのセグメント導体２Ａ、２Ｂ、２
Ｃ、２Ｄ、２Ｅが撚り合わされる分割成形導体が用いら
れ、この分割成形導体２の１つのセグメント導体２Ａを
構成する素線の撚りピッチＰは、他の４つのセグメント
導体２Ｂ、２Ｃ、２Ｄ、２Ｅを構成する素線の撚りピッ
チＰよりも大きくなっている。The conductor 2 of the CV cable 1 includes five segment conductors 2A, 2B, 2
C, 2D, and 2E are used, and the twist pitch P of the strands that constitute one segment conductor 2A of the split molded conductor 2 is the other four segment conductors 2B, 2C, 2D, It is larger than the twist pitch P of the strands constituting 2E.
【００１１】このような分割成形導体２が用いられたＣ
Ｖケーブル１を図２（ａ）に示すように、直線状に布設
して通電すると、分割成形導体２はジュール熱により発
熱して熱膨張を開始する。この際、１つのセグメント導
体２Ａを構成する素線の撚りピッチＰが他のセグメント
導体２Ｂ、２Ｃ、２Ｄ、２Ｅを構成する素線の撚りピッ
チＰよりも大きいので、この１つのセグメント導体２Ａ
と他のセグメント導体２Ｂ、２Ｃ、２Ｄ、２Ｅとの熱膨
張による伸び具合が変わってくる。即ち、素線の撚りピ
ッチＰが大きいセグメント導体２Ａの全長が、素線の撚
りピッチＰが小さいセグメント導体２Ｂ、２Ｃ、２Ｄ、
２Ｅの全長よりも長くなるので、分割成形導体２が螺旋
状に捩れることになる。これは、素線の撚りピッチＰが
大きいセグメント導体２Ａは、素線の撚りピッチＰが小
さいセグメント導体２Ｂ、２Ｃ、２Ｄ、２Ｅに比べて長
手方向に伸びやすくなるからである。これにより、ＣＶ
ケーブル１は図２（ｂ）に示すように、波打つことにな
る。したがって、ＣＶケーブル１の熱伸縮を小さくする
ことができる。なお、１つのセグメント導体２Ａを構成
する素線の撚りピッチＰを、他のセグメント導体を構成
する素線の２Ｂ、２Ｃ、２Ｄ、２Ｅの撚りピッチＰの
１，５〜２倍とすれば、螺旋状の捩れ径の大きさを小さ
くすることが可能となる。The C using such a divided molded conductor 2 is
When the V cable 1 is laid straight and energized as shown in FIG. 2A, the split molded conductor 2 generates heat by Joule heat and starts thermal expansion. At this time, the twist pitch P of the strands forming one segment conductor 2A is larger than the twist pitch P of the strands forming the other segment conductors 2B, 2C, 2D, 2E.
And the other segment conductors 2B, 2C, 2D, and 2E change the degree of elongation due to thermal expansion. That is, the total length of the segment conductor 2A having a large strand twist pitch P is equal to the length of the segment conductors 2B, 2C, 2D, having a small strand twist pitch P.
Since it is longer than the entire length of 2E, the divided molded conductor 2 is spirally twisted. This is because the segment conductor 2A having a large strand twist pitch P is more likely to extend in the longitudinal direction than the segment conductors 2B, 2C, 2D, and 2E having a small strand pitch P. Thereby, CV
The cable 1 is wavy as shown in FIG. Therefore, thermal expansion and contraction of the CV cable 1 can be reduced. If the twist pitch P of the wire constituting one segment conductor 2A is 1,5 to 2 times the twist pitch P of the wires 2B, 2C, 2D and 2E constituting the other segment conductor, It is possible to reduce the size of the spiral torsion diameter.
【００１２】なお、上述した分割成形導体２の実施の一
形態によれば、１つのセグメント導体２Ａを構成する素
線の撚りピッチＰを、他のセグメント導体２Ｂ、２Ｃ、
２Ｄ、２Ｅを構成する素線の撚りピッチＰよりも大きく
していたが、これに限らず、１つのセグメント導体２Ａ
を構成する素線の撚りピッチＰを、他のセグメント導体
２Ｂ、２Ｃ、２Ｄ、２Ｅを構成する素線の撚りピッチＰ
より小さくしても、同様の効果を得ることができる。ま
た、素線の撚りピッチＰを変えるセグメント導体は、分
割成形導体２を螺旋状に捩ることができれば１つに限ら
ない。According to the above-described embodiment of the divided molded conductor 2, the twist pitch P of the wire constituting one segment conductor 2A is changed by the other segment conductors 2B, 2C,
Although the twist pitch was larger than the twist pitch P of the wires constituting the 2D and 2E, the present invention is not limited to this.
The twist pitch P of the strands constituting the other segment conductors 2B, 2C, 2D, 2E
The same effect can be obtained with a smaller size. Further, the number of segment conductors for changing the twist pitch P of the strands is not limited to one as long as the divided molded conductor 2 can be spirally twisted.
【００１３】さらに、図３に示すように、分割成形導体
２′の１つのセグメント導体２′Ａの例えば最外層２０
の素線の撚りピッチＰを、他のセグメント導体２′Ｂ、
２′Ｃ、２′Ｄ、２′Ｅの最外層２０の素線の撚りピッ
チＰより大きくしてもよい。ここで、「層」とは、素線
を同心円上に配置して順次積重ねるような形で撚り合わ
せた際の、各々の同心円内の素線群のことをいう。ま
た、１つのセグメント導体２′Ａの他の層２１、２２、
２３、２４の素線の撚りピッチＰは、他の４つのセグメ
ント導体２′Ｂ、２′Ｃ、２′Ｄ、２′Ｅの他の層２
１、２２、２３、２４の素線の撚りピッチＰと同一とす
る。Further, as shown in FIG. 3, for example, the outermost layer 20 of one segment conductor 2'A of the divided molded conductor 2 '
The twist pitch P of the element wire of the other segment conductor 2'B,
The twist pitch P of the strands of the outermost layer 20 of 2′C, 2′D, and 2′E may be larger. Here, the “layer” refers to a group of strands in each concentric circle when the strands are arranged on concentric circles and twisted in such a manner as to be sequentially stacked. Further, the other layers 21 and 22 of one segment conductor 2'A,
The twist pitch P of the strands 23, 24 is the same as that of the other layers 2 of the other four segment conductors 2'B, 2'C, 2'D, 2'E.
The twist pitch P of the element wires 1, 22, 23, and 24 is the same.
【００１４】このように構成された分割成形導体２′に
通電すると、ジュール熱により発熱して熱膨張するが、
１つのセグメント導体２′Ａの最外層２０の撚りピッチ
Ｐが他のセグメント導体２′Ｂ、２′Ｃ、２′Ｄ、２′
Ｅの最外層２０の素線の撚りピッチＰより大きいので、
この１つのセグメント導体２′Ａの最外層２０と他のセ
グメント導体２′Ｂ、２′Ｃ、２′Ｄ、２′Ｅの最外層
２０との熱膨張による伸び具合が変わってくる。即ち、
上述した分割成形導体２と同様に、素線の撚りピッチＰ
が大きいセグメント導体２′Ａの最外層２０の全長が、
素線の撚りピッチＰが小さいセグメント導体２′Ｂ、
２′Ｃ、２′Ｄ、２′Ｅの最外層２０の全長よりも長く
なるので、分割成形導体２が螺旋状に捩れることにな
る。これにより、ＣＶケーブル１は図２（ｂ）に示すよ
うに、波打つことになる。したがって、ＣＶケーブル１
の熱伸縮を小さくすることができる。特に、この螺旋状
の捩れは、１つのセグメント導体２′Ａの最外層２０の
撚りピッチＰを大きくすると顕著に現れる。When the divided molded conductor 2 'thus constructed is energized, it generates heat due to Joule heat and thermally expands.
The twist pitch P of the outermost layer 20 of one segment conductor 2'A is different from that of the other segment conductors 2'B, 2'C, 2'D, 2 '.
Since it is larger than the twist pitch P of the strand of the outermost layer 20 of E,
The degree of expansion of the outermost layer 20 of this one segment conductor 2'A and the outermost layer 20 of the other segment conductors 2'B, 2'C, 2'D, 2'E due to thermal expansion changes. That is,
Similarly to the above-described split molded conductor 2, the twist pitch P of the strand is
The total length of the outermost layer 20 of the segment conductor 2'A having a large
A segment conductor 2′B having a small strand twist pitch P,
Since the length of the outermost layer 20 of 2'C, 2'D, and 2'E is longer than that of the outermost layer 20, the divided molded conductor 2 is spirally twisted. As a result, the CV cable 1 is wavy as shown in FIG. Therefore, CV cable 1
Can be reduced in thermal expansion and contraction. In particular, this helical twist becomes conspicuous when the twist pitch P of the outermost layer 20 of one segment conductor 2'A is increased.
【００１５】なお、上述した分割成形導体２′の実施の
一形態によれば、１つのセグメント導体２′Ａを構成す
る最外層２０の素線の撚りピッチＰを、他のセグメント
導体２′Ｂ、２′Ｃ、２′Ｄ、２′Ｅを構成する最外層
２０の素線の撚りピッチＰよりも大きくしていたが、こ
れに限らず、１つのセグメント導体２′Ａを構成する最
外層２０の素線の撚りピッチＰを、他のセグメント導体
２′Ｂ、２′Ｃ、２′Ｄ、２′Ｅを構成する最外層２０
の素線の撚りピッチＰより小さくしても、同様の効果を
得ることができる。また、層の素線の撚りピッチＰを変
えるセグメント導体は、分割成形導体２を螺旋状に捩る
ことができれば１つに限らない。According to the above-described embodiment of the divided molded conductor 2 ', the twist pitch P of the strands of the outermost layer 20 forming one segment conductor 2'A is changed to the other segment conductor 2'B , 2'C, 2'D, and 2'E, the twist pitch of the strands of the outermost layer 20 is larger than the pitch P. However, the present invention is not limited to this. The twist pitch P of the 20 strands is changed to the outermost layer 20 constituting the other segment conductors 2'B, 2'C, 2'D, 2'E.
The same effect can be obtained even if it is smaller than the twist pitch P of the element wire. Further, the number of segment conductors for changing the twist pitch P of the strands of the layer is not limited to one as long as the divided molded conductor 2 can be spirally twisted.
【００１６】また、上述した本発明の電力ケーブルの撚
線構造の各実施の一形態においては、分割成形導体とし
て５分割の扇型圧縮導体が用いられていたが、これに限
らず、分割数はいくつでもよく、また、導体は円形圧縮
導体でもよく、さらに、１つのセグメント導体の層は何
層でもよい。また、本発明の撚線構造が適用される電力
ケーブルはＣＶケーブルに限らず、分割成形導体を用い
る電力ケーブルならば、どのようなものでもよい。Further, in each embodiment of the above-described stranded wire structure of the power cable of the present invention, a five-segment fan-shaped compressed conductor is used as the divided molded conductor, but the invention is not limited to this. And the conductor may be a circular compression conductor, and the number of layers of one segment conductor may be any number. Further, the power cable to which the stranded structure of the present invention is applied is not limited to the CV cable, but may be any power cable using a divided molded conductor.
【００１７】[0017]
【実施例】以下、本発明の撚線構造が適用される電力ケ
ーブルの導体の一実施例について説明する。本発明の撚
線構造が適用される電力ケーブルの導体は、５分割の扇
型圧縮導体で、各セグメント導体は５層から成る。この
５分割の扇型圧縮導体のうちの４つのセグメント導体の
諸元は、中心となる１層は素線数が１、素線径が３，２
mm、素線の撚りピッチが０mm、１層に積重ねられる２層
は素線数が６、素線径が３，２mm、素線の撚りピッチが
１１７mm、２層に積重ねられる３層は素線数が１２、素
線径が３，２mm、素線の撚りピッチが１６４mm、３層に
積重ねられる４層は素線数が２１、素線径が２，７mm、
素線の撚りピッチが２７４mm、４層に積重ねられる５層
は素線数が２７、素線径が２，７mm、素線の撚りピッチ
が３５２mmとする。また、残りの１つのセグメント導体
の各層の素線の撚りピッチは、４つのセグメント導体の
各層の撚りピッチの２倍とし、それ以外の諸元は同一と
する。なお、素線の材質は軟銅とする。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a conductor of a power cable to which the stranded structure of the present invention is applied will be described below. The conductor of the power cable to which the stranded structure of the present invention is applied is a five-part fan-shaped compressed conductor, and each segment conductor is composed of five layers. The specifications of the four segment conductors of the five-segment fan-shaped compressed conductor are as follows.
mm, the strand twist pitch is 0 mm, the two layers stacked on one layer have six strands, the strand diameter is 3.2 mm, the strand twist pitch is 117 mm, and the three layers stacked on two layers are strands The number is 12, the wire diameter is 3.2 mm, the twist pitch of the wires is 164 mm, and the four layers stacked in three layers have 21 wires, the wire diameter is 2.7 mm,
The twisting pitch of the wires is 274 mm, and the five layers stacked in four layers have the number of wires of 27, the wire diameter of 2.7 mm, and the twisting pitch of the wires of 352 mm. The twist pitch of the strands of each layer of the remaining one segment conductor is set to twice the twist pitch of each layer of the four segment conductors, and other specifications are the same. The material of the strand is soft copper.
【００１８】このように構成される各セグメント導体
は、上述のような素線の撚りピッチになるようにそれぞ
れ撚線機で撚られた後、圧縮ダイスで扇型に圧縮され、
この扇型に圧縮された各セグメント導体を撚り合せ機で
撚り合わすことにより、本発明の電力ケーブルの撚線構
造に形成させることができる。したがって、電力ケーブ
ルの導体に通電した時に、１つのセグメント導体と４つ
のセグメント導体との熱膨張による伸び具合を変えるこ
とができるので、この電力ケーブルの導体を螺旋状に捩
ることができるようになる。Each of the segment conductors configured as described above is twisted by a twisting machine so as to have the above-described strand twist pitch, and then compressed into a fan shape by a compression die.
By twisting each of the segment conductors compressed in the fan shape with a twisting machine, the twisted wire structure of the power cable of the present invention can be formed. Therefore, when power is supplied to the conductor of the power cable, the degree of expansion of the one segment conductor and the four segment conductors due to thermal expansion can be changed, and the conductor of the power cable can be twisted in a helical manner. .
【００１９】[0019]
【発明の効果】以上説明したように、本発明の電力ケー
ブルの撚線構造によれば、電力ケーブルの熱伸縮を小さ
くすることができる。これにより、マンホール内のオフ
セット部を小さく又は不要にできるので、マンホールを
小さくすることができる。また、スネーク布設を小さく
又は不要にすることができる。As described above, according to the stranded structure of the power cable of the present invention, the thermal expansion and contraction of the power cable can be reduced. Thus, the offset portion in the manhole can be made small or unnecessary, so that the manhole can be made small. In addition, the snake installation can be made small or unnecessary.
【図1】本発明の電力ケーブルの撚線構造の実施の一形
態を示す図で、（ａ）はＣＶケーブルの断面図、（ｂ）
はセグメント導体における撚りピッチの説明図。FIG. 1 is a view showing one embodiment of a stranded structure of a power cable of the present invention, wherein (a) is a cross-sectional view of a CV cable, and (b)
FIG. 4 is an explanatory diagram of a twist pitch in a segment conductor.
【図2】本発明の撚線構造が適用された電力ケーブルを
示す図で、（ａ）は布設状態の説明図、（ｂ）は（ａ）
の電力ケーブルを通電した状態の説明図。FIGS. 2A and 2B are diagrams showing a power cable to which the stranded wire structure of the present invention is applied, wherein FIG. 2A is an explanatory diagram of a laid state, and FIG.
Explanatory drawing of the state which energized the power cable of FIG.
【図3】本発明の電力ケーブルの撚線構造の他の実施の
一形態を示す部分断面図。FIG. 3 is a partial cross-sectional view showing another embodiment of the stranded structure of the power cable of the present invention.
【図4】従来の電力ケーブルの地中への布設状態を示す
説明図。FIG. 4 is an explanatory diagram showing a state in which a conventional power cable is laid underground.
１・・・・・ＣＶケーブル（電力ケーブル） ２・・・・・分割成形導体 ２Ａ、２′Ａ・・・・・１つのセグメント導体 ２Ｂ、２Ｃ、２Ｄ、２Ｅ、２′Ｂ、２′Ｃ、２′Ｄ、
２′Ｅ・・・・・他のセグメント導体 ２０・・・・・最外層 ２１、２２、２３、２４・・・・・層 Ｐ・・・・・素線の撚りピッチ1 ... CV cable (power cable) 2 ... Divided molded conductor 2A, 2'A ... 1 segment conductor 2B, 2C, 2D, 2E, 2'B, 2'C , 2'D,
2'E... Other segment conductor 20... Outermost layer 21, 22, 23, 24... Layer P.
Claims (4)
構造において、前記分割成形導体の少なくとも１つのセ
グメント導体を構成する素線の撚りピッチが他のセグメ
ント導体を構成する素線の撚りピッチと異なることを特
徴とする電力ケーブルの撚線構造。In a stranded wire structure of a power cable having a divided molded conductor, a twist pitch of a wire constituting at least one segment conductor of the divided molded conductor is equal to a twist pitch of a wire constituting another segment conductor. A twisted wire structure of a power cable, which is different.
構造において、前記分割成形導体の少なくとも１つのセ
グメント導体を構成する複数の層のうちの何れか１つの
層の素線の撚りピッチが、他のセグメント導体を構成す
る複数の層のうちの前記１つのセグメント導体の前記１
つの層と同じ１つの層の素線の撚りピッチと異なること
を特徴とする電力ケーブルの撚線構造。In a stranded wire structure of a power cable having a divided molded conductor, a twist pitch of a strand of one of a plurality of layers constituting at least one segment conductor of the divided molded conductor is: The one of the one segment conductors among the plurality of layers constituting the other segment conductors
A stranded wire structure for a power cable, wherein the stranded pitch is different from the stranded pitch of the strand of the same one layer as the one layer.
外層であることを特徴とする請求項２記載の電力ケーブ
ルの撚線構造。3. The power cable stranded structure according to claim 2, wherein each one layer is an outermost layer of the segment conductor.
線の撚りピッチは、前記他のセグメント導体の素線の撚
りピッチの１，５〜２倍であることを特徴とする請求項
１、２または３記載の電力ケーブルの撚線構造。4. The twist pitch of the strands of the at least one segment conductor is 1.5 to 2 times the twist pitch of the strands of the other segment conductor. 3. The stranded structure of the power cable according to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10198805A JP2000030546A (en) | 1998-07-14 | 1998-07-14 | Stranded wire structure of electric power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10198805A JP2000030546A (en) | 1998-07-14 | 1998-07-14 | Stranded wire structure of electric power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000030546A true JP2000030546A (en) | 2000-01-28 |
Family
ID=16397212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10198805A Withdrawn JP2000030546A (en) | 1998-07-14 | 1998-07-14 | Stranded wire structure of electric power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000030546A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360588A (en) * | 2011-09-09 | 2012-02-22 | 江苏圣安电缆有限公司 | 3000 mm<2> aluminum core segmental conductor |
-
1998
- 1998-07-14 JP JP10198805A patent/JP2000030546A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360588A (en) * | 2011-09-09 | 2012-02-22 | 江苏圣安电缆有限公司 | 3000 mm<2> aluminum core segmental conductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20051004 |