JPH02184215A - Power cable path - Google Patents
Power cable pathInfo
- Publication number
- JPH02184215A JPH02184215A JP234489A JP234489A JPH02184215A JP H02184215 A JPH02184215 A JP H02184215A JP 234489 A JP234489 A JP 234489A JP 234489 A JP234489 A JP 234489A JP H02184215 A JPH02184215 A JP H02184215A
- Authority
- JP
- Japan
- Prior art keywords
- metal sheath
- power cable
- resistance
- phase cables
- sheath
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 47
- 239000002184 metal Substances 0.000 claims abstract description 47
- 239000004020 conductor Substances 0.000 claims abstract description 23
- 238000005260 corrosion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Cable Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は電力ケーブル線路、さらに詳細には、線路の途
中に普通接続部と絶縁接続部とを有し、金属シースを異
相ケーブル間でクロスボンドする構造の電力ケーブル線
路に関するものである。Detailed Description of the Invention The present invention relates to a power cable line, and more particularly, to a power cable line having a structure in which a normal connection part and an insulated connection part are provided in the middle of the line, and metal sheaths are cross-bonded between different phase cables. It is related to.
金属シース単心電力ケーブル線路においては、金属シー
スをアルミや鉛で構成し、この金属シースによってケー
ブル内の気密を保つと同時に、金属シースを地絡電流の
帰路に利用している。In a metal sheath single-core power cable line, the metal sheath is made of aluminum or lead, and the metal sheath maintains airtightness within the cable, while at the same time using the metal sheath as a return path for ground fault current.
しかして、金属シースに流れる循環電流を低減するため
には、各電力ケーブルの金属シースを異相ケーブル間で
接続する。所謂クロスボンド方式が採用されている。こ
こで、クロスボンド方式を採用した従来型型カケープル
線路のシース回路を第３図に示す。第３図において、Ｉ
Ａ、ＩＢおよびＩＣは各相ケーブル、ＩＡＳ、ＩＢＳお
よびＩＣＳは上記各相ケーブルＩＡないしＩＣの金属シ
ースである。２ａおよび２ｂは各金属シースＩＡＳない
しＩＣ８ごとに設けられた普通接続箱を示し、普通接続
箱２ａ、２ｂ間に絶縁接続箱３ａおよび３ｂが設けられ
ている。絶縁接続箱３ａ、３ｂの前後においては、異相
ケーブルの金属シースＩＡＳ、ＩＢＳ、ＩＣ３同志がボ
ンディングワイヤ４を介して順次接続される。Therefore, in order to reduce the circulating current flowing through the metal sheath, the metal sheaths of each power cable are connected between different phase cables. A so-called cross bond method is adopted. Here, a sheath circuit of a conventional cable cable line employing the cross-bond system is shown in FIG. In Figure 3, I
A, IB, and IC are the respective phase cables, and IAS, IBS, and ICS are the metal sheaths of the above-mentioned phase cables IA to IC. 2a and 2b indicate normal connection boxes provided for each metal sheath IAS to IC8, and insulating connection boxes 3a and 3b are provided between the normal connection boxes 2a and 2b. Before and after the insulated connection boxes 3a and 3b, the metal sheaths IAS, IBS, and IC3 of the different phase cables are sequentially connected via bonding wires 4.
クロスボンド方式を採用した従来型電力ケープルのシー
ス回路は以上のごとき構成よりなり、金属シースＩＡＳ
ないしＩＣ８を異相ケーブル間でクロスボンドすること
により、各金属シースＩＡＳないしＩＣ５に流れる循環
電流を抑制しようとするものであるが、この構造によれ
ば、シース回路のサージインピーダンスがクロスボンド
部で大幅に変化し、雷サージや開閉サージなどの高周波
電圧がケーブル線路に侵入してくると、上記クロスボン
ド部で異常に高い電圧が発生し、防食層が損壊されるお
それがあるため、高価な防食層保護装置を付設せざるを
得なかった。The sheath circuit of a conventional power cable that uses the cross-bond method has the above configuration, and the metal sheath IAS
By cross-bonding IC8 or IC8 between cables of different phases, the circulating current flowing through each metal sheath IAS or IC5 is suppressed, but according to this structure, the surge impedance of the sheath circuit is significantly reduced at the cross-bond part. When high-frequency voltages such as lightning surges and switching surges enter the cable line, an abnormally high voltage is generated at the cross bond section, which may damage the corrosion protection layer. A layer protection device had to be installed.
本発明は以上の点を考慮してなされたものであって、そ
の目的とするところは、地絡容量を十分確保する一方で
金属シースに流れる循環電流を大幅に減少することがで
き、しかも雷サージや開閉サージなどの高周波電圧が侵
入してきてもクロスボンド部に異常な高電圧を発生する
ことのない改良された電力ケーブル線路を提供しようと
するものである。The present invention has been made in consideration of the above points, and its purpose is to significantly reduce the circulating current flowing through the metal sheath while ensuring sufficient ground fault capacity. The purpose of the present invention is to provide an improved power cable line that does not generate an abnormally high voltage at the cross bond portion even when high frequency voltages such as surges and switching surges enter.
上記目的を達成するため、本発明は、線路の途中に普通
接続部と絶縁接続部とを有し、金属シースを異相ケーブ
ル間でクロスボンドする構造の電力ケーブル線路におい
て、上記電力ケーブルの金属シースを高抵抗金属シース
と低抵抗外部導体とで構成し、低抵抗外部導体を異相ケ
ーブル間でクロスボンドし、高抵抗金属シースを同相ケ
ーブル間で接続してなることを特徴とするものである。In order to achieve the above object, the present invention provides a power cable line having a normal connection part and an insulated connection part in the middle of the line, and having a structure in which metal sheaths are cross-bonded between cables of different phases. It is characterized by comprising a high-resistance metal sheath and a low-resistance outer conductor, the low-resistance outer conductor being cross-bonded between cables of different phases, and the high-resistance metal sheath being connected between cables of the same phase.
以下、本発明を、第１図および第２図の一実施例にもと
づいて説明すると、第１図は本発明に係る電力ケーブル
線路のシース回路接続部、第２図は第１図の線路を構成
する電力ケーブルの横断面図であって、第１図において
、第３図と同一符号は同一部分、７ａおよび７ｂは第２
図に示すように、金属シース７を構成する高抵抗金属シ
ースと低抵抗外部導体とであり、本発明において、ケー
ブル内の気密は高抵抗金属シース７ａによって保持され
、低抵抗外部導体７ｂは地絡電流の帰路に使用される。Hereinafter, the present invention will be explained based on an embodiment shown in FIGS. 1 and 2. FIG. 1 shows a sheath circuit connection portion of a power cable line according to the present invention, and FIG. 2 shows the line shown in FIG. 1. FIG. 1 is a cross-sectional view of the power cables, in which the same reference numerals as in FIG. 3 indicate the same parts, and 7a and 7b indicate the second
As shown in the figure, the metal sheath 7 is composed of a high-resistance metal sheath and a low-resistance outer conductor. In the present invention, airtightness within the cable is maintained by the high-resistance metal sheath 7a, and the low-resistance outer conductor 7b is grounded. Used as a return path for short circuit current.
ここで、第２図に示す電力ケーブルの内部構造を説明す
ると、５は導体、６は絶縁体、７ａおよび７ｂは既述し
た高抵抗金属シースと低抵抗外部導体、８は防食層であ
って、高抵抗金属シース７ａはステンレス製のコルゲー
ト管で構成されており、また低抵抗外部導体７ｂは複数
本の銅条をねん回して構成されている。Here, to explain the internal structure of the power cable shown in FIG. 2, 5 is a conductor, 6 is an insulator, 7a and 7b are the already mentioned high resistance metal sheath and low resistance outer conductor, and 8 is an anti-corrosion layer. The high-resistance metal sheath 7a is made of a stainless steel corrugated tube, and the low-resistance outer conductor 7b is made of a plurality of twisted copper strips.
しかして、本発明において、高抵抗金属シース７ａと低
抵抗外部導体７ｂとは、第１図からも明らかなように、
三相とも一括して普通接続部で接地されているが、クロ
スボンド区間の絶縁接続部においては、低抵抗外部導体
７ｂがボンディングワイヤ４を介して異相ケーブルの外
部導体に順次接続されており、高抵抗金属シース７ａの
みが同相ケーブル間で接続されている。Therefore, in the present invention, the high-resistance metal sheath 7a and the low-resistance outer conductor 7b are, as is clear from FIG.
All three phases are grounded at the common connection part, but in the insulated connection part of the cross bond section, the low resistance external conductor 7b is sequentially connected to the external conductor of the different phase cable via the bonding wire 4, Only the high resistance metal sheath 7a is connected between the in-phase cables.
本発明は以上のごとき構成よりなり、本発明においては
、電力ケーブルの金属シース７を高抵抗金属シース７ａ
と低抵抗外部導体７ｂとで構成したから、地絡電流は低
抵抗外部導体７ｂを流れ、十分な地絡容量を確保できる
ものであって、他方、低抵抗外部導体７ｂは異相ケーブ
ル間でクロスボンドされており、高抵抗金属シース７ａ
は自己の抵抗が十分に高いので、高抵抗金属シース７ａ
および低抵抗外部導体７ｂのいずれにも循環電流はほと
んど流れず、回路損の低減化が可能となる。The present invention has the above configuration, and in the present invention, the metal sheath 7 of the power cable is replaced with a high resistance metal sheath 7a.
and the low resistance external conductor 7b, the ground fault current flows through the low resistance external conductor 7b and sufficient ground fault capacity can be secured. bonded, high resistance metal sheath 7a
has a sufficiently high self-resistance, so the high-resistance metal sheath 7a
Almost no circulating current flows through either of the low-resistance external conductor 7b and the low-resistance external conductor 7b, making it possible to reduce circuit loss.
また、既述のごとく、高抵抗金属シース７ａは同相ケー
ブル間で接続されているので、クロスボンド部でのサー
ジインピーダンスはほぼ均一となり、雷サージや開閉サ
ージなどの高周波電圧がケーブル線路に侵入してきても
、クロスボンド部に高電圧が発生することはなく、従来
用いられている高価な防食層保護装置の使用を省略する
ことができる。In addition, as mentioned above, since the high-resistance metal sheath 7a is connected between the same-mode cables, the surge impedance at the cross bond portion is almost uniform, and high-frequency voltages such as lightning surges and switching surges do not enter the cable line. However, high voltage is not generated at the cross bond portion, and the use of the conventionally used expensive anti-corrosion layer protection device can be omitted.
なお、図示を省略したが、本発明の他の実施例として、
高抵抗金属シースを絶縁接続部で接地すれば、当該金属
シースは高抵抗であるが故に循環電流はほとんど流れず
、誘導電圧の低減化とサージ電圧の低減化とをはかるこ
とができる。これに対し、従来においては、絶縁接続部
で金属シースを接地すると、循環電流が金属シースに流
れるため、斯かる構成を採用することはできなかった。Although not shown in the drawings, other embodiments of the present invention include:
If the high-resistance metal sheath is grounded at the insulating connection, since the metal sheath has high resistance, almost no circulating current will flow, and it is possible to reduce induced voltage and surge voltage. On the other hand, in the past, when the metal sheath was grounded at the insulating connection part, a circulating current would flow through the metal sheath, so such a configuration could not be adopted.
以上詳述したように、本発明によれば、地絡容量を十分
確保する一方で金属シースに流れる循環電流を大幅に減
少することができ、しかも雷サージや開閉サージなどの
高周波電圧が侵入してきてもクロスボンド部に異常な高
電圧を発生することのない改良された電力ケーブル線路
を得ることができる。As detailed above, according to the present invention, it is possible to significantly reduce the circulating current flowing through the metal sheath while ensuring sufficient ground fault capacity, and moreover, it is possible to significantly reduce the circulating current flowing through the metal sheath, and moreover, it is possible to significantly reduce the circulating current flowing through the metal sheath. An improved power cable line that does not generate abnormally high voltage at the cross bond portion can be obtained.
第１図は本発明に係る電力ケーブル線路のシース回路接
続図、第２図は第１図の線路を構成する電力ケーブルの
横断面図、第３図は従来型型カケープル線路のシース回
路接続図である。
ＩＡ、ＩＢおよびＩＣ二ケーブル、
２ａおよび２ｂ＝普通接続箱、
３ａおよび３ｂ＝絶縁接続箱、
４：ボンディングワイヤ、
５：導体、
６二絶縁体、
７ａ：高抵抗金属シース、
７ｂ：低抵抗外部導体、Fig. 1 is a sheath circuit connection diagram of a power cable line according to the present invention, Fig. 2 is a cross-sectional view of a power cable constituting the line of Fig. 1, and Fig. 3 is a sheath circuit connection diagram of a conventional cable line. It is. IA, IB and IC two cables, 2a and 2b = ordinary junction box, 3a and 3b = insulated junction box, 4: bonding wire, 5: conductor, 6 two insulators, 7a: high resistance metal sheath, 7b: low resistance external conductor,
Claims (1)
属シースを異相ケーブル間でクロスボンドする構造の電
力ケーブル線路において、上記電力ケーブルの金属シー
スを高抵抗金属シースと低抵抗の外部導体とで構成し、
低抵抗外部導体を異相ケーブル間でクロスボンドし、高
抵抗金属シースを同相ケーブル間で接続してなることを
特徴とする電力ケーブル線路。 ２、高抵抗金属シースを絶縁接続部で接地してなること
を特徴とする請求項１記載の電力ケーブル線路。[Claims] 1. In a power cable line having a normal connection part and an insulated connection part in the middle of the line, and having a structure in which metal sheaths are cross-bonded between different phase cables, the metal sheath of the power cable has a high resistance. Consisting of a metal sheath and a low resistance outer conductor,
A power cable line characterized by a low-resistance external conductor cross-bonded between different-phase cables and a high-resistance metal sheath connected between same-phase cables. 2. The power cable line according to claim 1, characterized in that the high resistance metal sheath is grounded at an insulated connection part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP234489A JPH02184215A (en) | 1989-01-09 | 1989-01-09 | Power cable path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP234489A JPH02184215A (en) | 1989-01-09 | 1989-01-09 | Power cable path |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02184215A true JPH02184215A (en) | 1990-07-18 |
Family
ID=11526667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP234489A Pending JPH02184215A (en) | 1989-01-09 | 1989-01-09 | Power cable path |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02184215A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100586448B1 (en) * | 2005-10-18 | 2006-06-08 | 전명수 | A 3-phase network system for suppressing voltage and circulation current of concentric neutral conductor cable |
| WO2013043005A2 (en) * | 2011-09-23 | 2013-03-28 | Jun Myung-Soo | Economical power cable distribution system |
| JP2013138593A (en) * | 2011-07-01 | 2013-07-11 | Nexans | Electrical line furnished with screen-break junctions |
-
1989
- 1989-01-09 JP JP234489A patent/JPH02184215A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100586448B1 (en) * | 2005-10-18 | 2006-06-08 | 전명수 | A 3-phase network system for suppressing voltage and circulation current of concentric neutral conductor cable |
| JP2013138593A (en) * | 2011-07-01 | 2013-07-11 | Nexans | Electrical line furnished with screen-break junctions |
| WO2013043005A2 (en) * | 2011-09-23 | 2013-03-28 | Jun Myung-Soo | Economical power cable distribution system |
| WO2013043005A3 (en) * | 2011-09-23 | 2013-05-30 | Jun Myung-Soo | Economical power cable distribution system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0071435B1 (en) | Electric cable and electric cable installations | |
| US20040104798A1 (en) | Arrangement of an inductive coupler for power line communications | |
| JPH02184215A (en) | Power cable path | |
| US20040011551A1 (en) | Three-phase high voltage cable arrangement having cross-bonded cable screens and cross-bonded water sensing wires | |
| US10411624B2 (en) | Switching transient damper method and apparatus | |
| AU2001254760A1 (en) | Three-phase high voltage cable arrangement having cross-bonded cable screens and cross-bonded water sensing wires | |
| JPS5937551B2 (en) | How to ground a 3-phase line consisting of a single-core cable | |
| RU1814127C (en) | Power network | |
| RU1774421C (en) | Electrical network | |
| JPS6223207Y2 (en) | ||
| JPS60233574A (en) | Accident point detecting device of single core metallic sheath cable | |
| JPH0557804B2 (en) | ||
| JPS5920256B2 (en) | power cable line | |
| JPS6237380Y2 (en) | ||
| JPH03235613A (en) | Arrester unit for transmission steel tower | |
| JP3434166B2 (en) | High-resistance sheath-type sheath interrupter | |
| JPH0127391Y2 (en) | ||
| JPS596106Y2 (en) | insulation junction box | |
| JPS608512Y2 (en) | Cable insulation connection | |
| JPS633535B2 (en) | ||
| JPS6111042B2 (en) | ||
| JPS6053525B2 (en) | Grounding method for power cable sheath | |
| JPS5822518A (en) | Method of bonding sheath of conduit gas cable | |
| JPH0636624A (en) | Solid insulated cable with wire shield layer | |
| JPH05328583A (en) | Cable connection provided with charge condition monitoring function |