JPS6228013Y2 - - Google Patents
Info
- Publication number
- JPS6228013Y2 JPS6228013Y2 JP1378781U JP1378781U JPS6228013Y2 JP S6228013 Y2 JPS6228013 Y2 JP S6228013Y2 JP 1378781 U JP1378781 U JP 1378781U JP 1378781 U JP1378781 U JP 1378781U JP S6228013 Y2 JPS6228013 Y2 JP S6228013Y2
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- cable
- sheath
- power cable
- wires
- 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
Links
- 229910001220 stainless steel Inorganic materials 0.000 claims description 23
- 239000010935 stainless steel Substances 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
Description
【考案の詳細な説明】
本考案は金属シースにステンレス鋼を使用した
電力ケーブルに関する。[Detailed Description of the Invention] The present invention relates to a power cable using stainless steel for the metal sheath.
従来、電力ケーブルのシースとしてアルミ被が
使用されているがアルミは電気抵抗率が小さいた
めシースの渦電流損失が大きいという欠点があ
る。 Conventionally, aluminum sheathing has been used as the sheath of power cables, but aluminum has a low electrical resistivity, so it has the disadvantage of high eddy current loss in the sheath.
このためアルミに代えて電気抵抗率の高いステ
ンレス鋼を用いることが考えられているが、ステ
ンレス鋼は剛性が大きいためアルミ被のようにケ
ーブル線心上に押出し被覆することは現状技術で
は不可能である。 For this reason, it has been considered to use stainless steel with high electrical resistivity instead of aluminum, but due to the high rigidity of stainless steel, it is impossible to extrude and coat the cable core like aluminum coating with current technology. It is.
したがつて、薄板状のステンレス鋼をケーブル
線心の外周に沿わせるように連続的に成形し合せ
目を溶接した後、波付加工を施こす方法が通信ケ
ーブルの製造などではおこなわれている。 Therefore, in the manufacture of communication cables, thin sheets of stainless steel are continuously formed along the outer circumference of the cable core, the seams are welded, and then a corrugated finish is applied. .
しかし、この方法をそのまま電力ケーブルに適
用しようとすると次のような問題点が生ずる。 However, if this method is applied directly to power cables, the following problems will occur.
(1) 電力ケーブルでは地絡時の電流が金属シース
に流れるためシースの温度が上昇する。この温
度上昇をケーブル絶縁体および防食層に許容さ
れる範囲内に納めるためには金属シースの厚さ
を大きくして、シース抵抗を小さくし、また充
分な熱容量を有するようにしなければならな
い。この結果、ケーブルの屈曲性は著しく損な
われることになり、場合によつてはドラムに巻
取つて輸送することが不可能になるなどの弊害
が生ずる。(1) In power cables, the current flowing through the metal sheath during a ground fault causes the temperature of the sheath to rise. In order to keep this temperature rise within the range allowed by the cable insulation and anti-corrosion layer, the thickness of the metal sheath must be increased, the sheath resistance must be reduced, and the metal sheath must have sufficient heat capacity. As a result, the flexibility of the cable is significantly impaired, and in some cases, it may become impossible to transport the cable by winding it around a drum.
(2) ステンレス鋼の合せ目を溶接する際、ステン
レス鋼が厚いと溶接に必要な熱量も多くなり、
また、ステンレス鋼がケーブル線心に接するた
めケーブル絶縁体を熱的に損傷する危険があ
る。(2) When welding stainless steel joints, the thicker the stainless steel, the more heat is required for welding.
Furthermore, since the stainless steel comes into contact with the cable core, there is a risk of thermal damage to the cable insulation.
本考案は、このような点に鑑み、前記の欠点を
解決したステンレス鋼の金属シースを有する電力
ケーブルを提供しようとするもので、その要旨は
ケーブル線心の外側に複数本のステンレス鋼線を
らせん状に配設し、その上にステンレス鋼板を縦
沿え包被し、その合せ目を溶接してなる電力ケー
ブルにある。 In view of these points, the present invention aims to provide a power cable having a stainless steel metal sheath that solves the above-mentioned drawbacks. This is a power cable that is arranged in a spiral, covered with a stainless steel plate vertically, and welded at the seam.
図面は、本考案にかかる電力ケーブルを示し、
１は導体２にケーブル絶縁体３、絶縁遮蔽層４を
順次設けたケーブル線心を示し、５はその上にら
せん状に配設された複数本のＤ型ステンレス鋼
線、６はステンレス鋼線５上に設けられたステン
レス鋼被覆で波付けが施こされている。 The drawing shows a power cable according to the invention,
Reference numeral 1 indicates a cable core in which a cable insulator 3 and an insulating shielding layer 4 are sequentially provided on a conductor 2, 5 indicates a plurality of D-shaped stainless steel wires arranged in a spiral thereon, and 6 indicates a stainless steel wire. A corrugated stainless steel coating is provided on top of the 5.
なお、７は防食層である。 Note that 7 is an anticorrosive layer.
ここで、ステンレス鋼被覆の厚さとして、通常
の製造技術で容易に被覆できること、ケーブルの
屈曲性を損わないことの条件を満足する範囲であ
ることが肝要である。たとえば、275KV OFケー
ブル線路で35KA、0.2秒程度の地絡容量が必要な
場合、これに必要なステンレス鋼被覆の厚さは約
２mmであるが、本考案においてはこれを１mm程度
あるいはそれ以下とし、地絡電流容量の不足分は
Ｄ型ステンレス鋼線５を所要本数配置することに
より負担させ必要な地絡電流容量を確保するもの
である。 Here, it is important that the thickness of the stainless steel coating be within a range that satisfies the conditions that it can be easily coated using normal manufacturing techniques and that the flexibility of the cable is not impaired. For example, if a 275KV OF cable line requires 35KA and a ground fault capacity of about 0.2 seconds, the thickness of the stainless steel coating required for this is about 2 mm, but in this invention, this is about 1 mm or less. The shortfall in ground fault current capacity is covered by arranging the required number of D-type stainless steel wires 5 to ensure the necessary ground fault current capacity.
したがつて、本考案の電力ケーブルによれば次
のような効果が得られる。 Therefore, the power cable of the present invention provides the following effects.
(1) 波付アルミ被と同等の屈曲性および地絡容量
を有しながら、アルミ被よりも渦電流損失を小
さくすることができる。(1) While having the same flexibility and ground fault capacity as corrugated aluminum sheathing, it can reduce eddy current loss than aluminum sheathing.
(2) ステンレス鋼線を縦沿え成形し、その合せ目
を溶接するので気密性を有する電力ケーブルが
得られる。(2) Stainless steel wires are formed vertically and the joints are welded, resulting in an airtight power cable.
(3) Ｄ型ステンレス鋼線がステンレス鋼板に対し
てスペーサおよび熱容量体となるので、ステン
レス鋼板溶接時のケーブル絶縁体への熱影響を
緩和することができる。(3) Since the D-type stainless steel wire acts as a spacer and a heat capacity body for the stainless steel plate, it is possible to alleviate the thermal influence on the cable insulator during welding of the stainless steel plate.
図面は本考案にかかる電力ケーブルの斜視図で
ある。
１……ケーブル線心、５……Ｄ型ステンレス鋼
線、６……ステンレス鋼板。
The drawing is a perspective view of a power cable according to the present invention. 1... Cable core, 5... D type stainless steel wire, 6... Stainless steel plate.
Claims (1)
をらせん状に配設し、その上にステンレス鋼板を
縦沿え包被し、その合わせ目を溶接してなる電力
ケーブル。 A power cable is made by spirally arranging multiple stainless steel wires on the outside of a cable core, covering the wires with a vertical stainless steel plate, and welding the joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1378781U JPS6228013Y2 (en) | 1981-02-04 | 1981-02-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1378781U JPS6228013Y2 (en) | 1981-02-04 | 1981-02-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57128717U JPS57128717U (en) | 1982-08-11 |
| JPS6228013Y2 true JPS6228013Y2 (en) | 1987-07-18 |
Family
ID=29811861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1378781U Expired JPS6228013Y2 (en) | 1981-02-04 | 1981-02-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6228013Y2 (en) |
-
1981
- 1981-02-04 JP JP1378781U patent/JPS6228013Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57128717U (en) | 1982-08-11 |
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