JPH03198615A - Conductor shift detector for power cable connecting box - Google Patents
Conductor shift detector for power cable connecting boxInfo
- Publication number
- JPH03198615A JPH03198615A JP33953489A JP33953489A JPH03198615A JP H03198615 A JPH03198615 A JP H03198615A JP 33953489 A JP33953489 A JP 33953489A JP 33953489 A JP33953489 A JP 33953489A JP H03198615 A JPH03198615 A JP H03198615A
- Authority
- JP
- Japan
- Prior art keywords
- conductor
- cable
- magnetic flux
- power cable
- shift
- 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
- 239000004020 conductor Substances 0.000 title claims abstract description 57
- 230000004907 flux Effects 0.000 claims abstract description 32
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims description 35
- 230000006378 damage Effects 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Landscapes
- Cable Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高置圧電力ケーブル接続箱内の導体移動量を検
出する装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting the amount of conductor movement in a high voltage power cable junction box.
第５図は従来の電力ケーブル接続箱１２の縦断面図であ
る。ケーブル導体１同志が導体接続スリーブ２で電気的
に接続され、その上に補強絶縁層３がケーブル絶縁層４
同志を連絡するように設けられている。補強絶縁層３の
外周には補強遮蔽層６がケーブル遮蔽層５同志を連絡す
るように設けられている。通常補強遮蔽層６の外径はケ
ーブルシース７の外径より大きくなる。更にその外周に
はケーブル接続部全体を保護する接続箱ケース９がケー
ブルシース７同志を連絡するように設けられている。FIG. 5 is a longitudinal sectional view of a conventional power cable junction box 12. The cable conductors 1 are electrically connected to each other by a conductor connection sleeve 2, and a reinforcing insulating layer 3 is formed on the cable insulating layer 4.
Provided to contact like-minded people. A reinforcing shielding layer 6 is provided on the outer periphery of the reinforcing insulating layer 3 so as to connect the cable shielding layers 5 to each other. Normally, the outer diameter of the reinforcing shield layer 6 will be larger than the outer diameter of the cable sheath 7. Furthermore, on the outer periphery, a junction box case 9 is provided to protect the entire cable connection section and connect the cable sheaths 7 to each other.
ケーブルシース７の材質はアルミ、鉛等で接続箱ケース
９の材質は銅等で出来ており、接続箱ケース９とケーブ
ルシース７との接続はノ・ンダ付は等で行われる。ケー
ブルシース７とケーブルコア１０（ケーブルからケーブ
ルシース７を除いた部分を総称する）との間には多少の
隙間がある。この電力ケーブル接続部においては、電カ
ケーフルに通電すると特に導体の接続部である導体接続
スリーブ２のような電気抵抗の高い部分の温度が上昇す
ることによりその外周の補強絶縁層３が軟化し、該補強
絶縁層３と導体接続スリーブ２との間にケーブル長手方
向のズレが生ずることがある。この時に導体接続スリー
ブ２またはケーブル導体１と補強絶縁層３との間にボイ
ドが発生し、そのため部分放電を起して、該補強絶縁層
３の絶縁性能を低下させ最終的に電力ケーブルを絶縁破
壊に至らしめるといった問題があった。The material of the cable sheath 7 is aluminum, lead, etc., and the material of the junction box case 9 is copper, etc., and the connection between the junction box case 9 and the cable sheath 7 is made with a bolt or the like. There is some gap between the cable sheath 7 and the cable core 10 (generally refers to the portion of the cable excluding the cable sheath 7). In this power cable connection part, when the power cable is energized, the temperature rises particularly in parts with high electrical resistance, such as the conductor connection sleeve 2, which is the connection part of the conductor, and the reinforcing insulating layer 3 on the outer periphery softens. Misalignment may occur between the reinforcing insulating layer 3 and the conductor connection sleeve 2 in the longitudinal direction of the cable. At this time, voids occur between the conductor connection sleeve 2 or the cable conductor 1 and the reinforcing insulating layer 3, causing partial discharge, reducing the insulation performance of the reinforcing insulating layer 3, and ultimately insulating the power cable. There was a problem that it led to destruction.
本発明の目的は導体接続スリーブ２またはケーブル導体
】と補強絶縁層３との間のケーブル長手方向のズレ即ち
導体移動量を連続的または定期的に測定しケーブル事故
を未然に防止するための検出装置を提供することにある
。The object of the present invention is to continuously or periodically measure the displacement in the longitudinal direction of the cable, that is, the amount of conductor movement, between the conductor connection sleeve 2 or the cable conductor and the reinforcing insulating layer 3, and to detect it in order to prevent cable accidents. The goal is to provide equipment.
本発明は上記の課題を解決するたぬになされたもので、
電力ケーブル接続箱内の導体接続スリーブ上に設けられ
た永久磁石と、前記導体接続スリーブを覆う補強絶縁層
の外周に設けられ前記永久磁石から発生する磁束を検出
するための磁束検出センサを含む検出部を備えたことを
特徴とするものである。The present invention has been made to solve the above problems,
Detection including a permanent magnet provided on a conductor connection sleeve in a power cable connection box, and a magnetic flux detection sensor provided on the outer periphery of a reinforcing insulating layer covering the conductor connection sleeve for detecting magnetic flux generated from the permanent magnet. It is characterized by having a section.
このように導体接続スリーブ上に永久磁石を設け、前記
導体接続スリーブを覆う補強絶縁層の外周に前記永久磁
石から発生する磁束を検出するための磁束検出センサを
設けると、導体接続スリーブまたはケーブル導体と補強
絶縁層との間のケーブル長手方向のズレ即ち導体移動量
に応じて磁束検出センサの出力が変動する。従ってこの
磁束検出センサの出力の変動を調べることにより逆に導
体接続スリーブ２またはケーブル導体１と＃補強絶縁層
３との間のケーブル長手方向のズレ即ち導体移動量を検
出することが出来る。この導体移動量から電力ケーブル
接続箱１２内のケーブルの絶縁破壊の程度を推量するこ
とが出来るため電力ケーブル接続箱内のケーブルの絶縁
破壊を未然に防止することが出来る。In this way, if a permanent magnet is provided on the conductor connection sleeve and a magnetic flux detection sensor for detecting the magnetic flux generated from the permanent magnet is provided on the outer periphery of the reinforcing insulating layer covering the conductor connection sleeve, the conductor connection sleeve or the cable conductor The output of the magnetic flux detection sensor fluctuates depending on the displacement in the longitudinal direction of the cable between the conductor and the reinforcing insulating layer, that is, the amount of conductor movement. Therefore, by examining the fluctuation in the output of this magnetic flux detection sensor, it is possible to detect the displacement in the longitudinal direction of the cable, that is, the amount of conductor movement between the conductor connection sleeve 2 or the cable conductor 1 and the reinforcing insulating layer 3. Since the degree of dielectric breakdown of the cable in the power cable connection box 12 can be estimated from this amount of conductor movement, dielectric breakdown of the cable in the power cable connection box can be prevented.
本発明の実施例を第１図ないし第４図に基づいて説明す
る。第１図及び第２図は本発明に係る電力ケーブル接続
箱の導体移動量検出装置１１を示し、電力ケーブル接続
箱１２は次のように構成されている。Embodiments of the present invention will be described based on FIGS. 1 to 4. 1 and 2 show a conductor movement detection device 11 for a power cable junction box according to the present invention, and the power cable junction box 12 is constructed as follows.
ケーブル導体１同志が導体接続スリーブ２で電気的に接
続され、その上に補強絶縁層３がケーブル導体１同志を
連絡するように設けられている。The cable conductors 1 are electrically connected to each other by a conductor connection sleeve 2, and a reinforcing insulating layer 3 is provided thereon so as to connect the cable conductors 1 to each other.
補強絶縁層３の外周には補強遮蔽層６がケーブル遮蔽層
５同志を連絡するように設けられている。A reinforcing shielding layer 6 is provided on the outer periphery of the reinforcing insulating layer 3 so as to connect the cable shielding layers 5 to each other.
補強遮蔽層６の外径はケーブルシース７の外径よ１く
り大きくなる。更にその外周ははケーブル接続部全体を
保護する接続箱ケース９がケーブルシース７同志を連絡
するように設けられている。ケーブルシース７の材質は
アルミで接続箱ケース９の材質は銅で出来ており、接続
箱ケース９とケーブルシース７との接続はハンダ付けさ
れている。ケーブルシース７とケーブルコア１０（ケー
ブルからケーブルシース７を除いた部分を総称する）と
の間には多少の隙間がある。The outer diameter of the reinforcing shield layer 6 is one size larger than the outer diameter of the cable sheath 7. Furthermore, a junction box case 9 is provided on the outer periphery of the cable sheath 7 to protect the entire cable connection section. The material of the cable sheath 7 is aluminum, the material of the junction box case 9 is copper, and the connection between the junction box case 9 and the cable sheath 7 is soldered. There is some gap between the cable sheath 7 and the cable core 10 (generally refers to the portion of the cable excluding the cable sheath 7).
本発明の導体移動量検出装置１１は電カケーフル接続箱
１２の接続箱ケース９内にある導体接続スリーブ２上に
設けられた永久磁石１３と、前記導体接続スリーブ２を
覆う補強絶縁層３上に設けられ前記永久磁石１３から発
生する磁束を検出するための磁束検出センサ１４を含む
検出部１５とを備えている。The conductor movement amount detection device 11 of the present invention includes a permanent magnet 13 provided on a conductor connection sleeve 2 in a connection box case 9 of an electric cable full connection box 12, and a reinforcing insulating layer 3 covering the conductor connection sleeve 2. A detection section 15 including a magnetic flux detection sensor 14 for detecting the magnetic flux generated from the permanent magnet 13 is provided.
磁束検出センサ１／Ｉは例えばホール効果素子、磁気抵
抗素子またはンレノイドコイルの如き磁気起電力素子か
ら成っている。図示の実施例では複数の磁束検出センサ
をケーブル長手方向に５列それと直角の方向に３列、計
１５ケ配置して各々の磁束検出センサに付属するリード
線１６とともにプラスチックモールドで一体成形して検
出部１５を形成している。検出部１５は補強遮蔽層６」
二に設置されリード線１６を介して、接続箱クース９の
外部に取り付けられて各磁束検出センサ１４の検出出力
を外部の磁束密度表示装置１７に導くためのコネクタ１
８に接続されている。The magnetic flux detection sensor 1/I consists of a magnetoelectromotive force element, such as a Hall effect element, a magnetoresistive element or a lenoid coil. In the illustrated embodiment, a plurality of magnetic flux detection sensors are arranged in 5 rows in the longitudinal direction of the cable and 3 rows in the direction perpendicular to the cable, for a total of 15, and are integrally molded with a lead wire 16 attached to each magnetic flux detection sensor. A detection section 15 is formed. The detection part 15 is a reinforced shielding layer 6.
A connector 1 is installed on the outside of the junction box 9 through a lead wire 16 to guide the detection output of each magnetic flux detection sensor 14 to an external magnetic flux density display device 17.
8 is connected.
次に本発明の電力ケーブル接続箱の導体移動量検出装置
１１の使用状態を説明する。導体接続スリーブ２上に設
けられた永久磁石１３がケーブル長手方向に配置された
磁束検出センサ１４のうちの中央の磁束検出センサＡの
真下にあるときは、第４図実線で示すように該磁束検出
センサＡの検出出力が最大となるような線図が磁束密度
表示装置によって得られる。第４図において横軸はケー
プル長手方向の磁束検出センサの位置を示し、縦軸は検
出出力を示している。この電力ケーブルの導体接続スリ
ーブ２が何らかの要因で補強絶縁層３に対してケーブル
長手方向のズレ（導体移動量）を生ずると、前記線図は
点線で示すように検出出力のピークが前記ケーブル長手
方向のズレの分だけズしたものとなる。従って逆に線図
の検出出力のピークのズレ景を測定することにより導体
接続スリーブ２と補強絶縁層３とのケーブル長手方向の
ズレ（導体移動量）を知ることができる。Next, the usage state of the conductor movement amount detection device 11 of the power cable junction box of the present invention will be explained. When the permanent magnet 13 provided on the conductor connection sleeve 2 is located directly below the central magnetic flux detection sensor A of the magnetic flux detection sensors 14 arranged in the longitudinal direction of the cable, the magnetic flux is A diagram in which the detection output of the detection sensor A is maximized is obtained by the magnetic flux density display device. In FIG. 4, the horizontal axis indicates the position of the magnetic flux detection sensor in the longitudinal direction of the cable, and the vertical axis indicates the detection output. If the conductor connection sleeve 2 of this power cable causes a displacement (amount of conductor movement) in the longitudinal direction of the cable with respect to the reinforcing insulating layer 3 for some reason, the peak of the detection output will be in the longitudinal direction of the cable as shown by the dotted line in the diagram. It will be shifted by the amount of the shift in direction. Therefore, by measuring the deviation of the peak of the detection output in the diagram, it is possible to know the deviation (amount of conductor movement) between the conductor connection sleeve 2 and the reinforcing insulating layer 3 in the cable longitudinal direction.
以上説明したように本発明は、電力ケーブル接続箱内の
導体接続スリーブ上に設けられた永久磁石と、前記導体
接続スリーブを覆う補強絶縁層の外周に前記永久磁石か
ら発生する磁束を検出するための磁束検出センサを含む
検出部を備えているため、磁束検出センサで検出される
磁束密度の変動から導体接続スリーブと補強絶縁層との
間のズレ（導体移動量）を測定することができ、従って
電力ケーブル接続箱内の損傷の可能性を推量することが
出来るから電力ケーブル接続箱の損傷を未然に防止する
ことが出来る。As explained above, the present invention includes a permanent magnet provided on a conductor connection sleeve in a power cable connection box, and a magnetic flux generated from the permanent magnet on the outer periphery of a reinforcing insulating layer covering the conductor connection sleeve. Since it is equipped with a detection section including a magnetic flux detection sensor, it is possible to measure the misalignment (conductor movement amount) between the conductor connection sleeve and the reinforcing insulating layer from the fluctuation in magnetic flux density detected by the magnetic flux detection sensor. Therefore, it is possible to estimate the possibility of damage within the power cable connection box, thereby making it possible to prevent damage to the power cable connection box.
第１図及び第２図はそれぞれ本発明に係る導体移動量検
出装置を備えた電力ケーブル接続箱の要部の縦断面図及
び横断面図、第３図は本発明に用いられる検出部の平面
図、第４図は本実施例の装置によって検出される磁束密
度の分布状態を示す線図、第５図は従来の電力ケーブル
の接続箱の縦断面図である。
１・・ケーブル導体、２・・導体接続スリーブ、３・・
・補強絶縁層、４・・ケーブル絶縁層、５〜・・ケーブ
ル遮蔽層、６・・・補強遮蔽層、７・・・ケーブルシー
ス、° ９・・・接続箱ケース、ｌＯ・・・ケー
ブルコア、１１・・導体移動量検出装置、１２電カケ−
プル接続箱、１３・永久磁石、１４・・磁束検出センサ
、１５・・検出部、１６・・リード線、１７・・・磁束
密度表示装置、１８・・コネクタ。1 and 2 are a vertical cross-sectional view and a cross-sectional view, respectively, of a main part of a power cable junction box equipped with a conductor movement amount detection device according to the present invention, and FIG. 3 is a plan view of a detection section used in the present invention. 4 is a diagram showing the distribution of magnetic flux density detected by the device of this embodiment, and FIG. 5 is a longitudinal sectional view of a conventional power cable junction box. 1... Cable conductor, 2... Conductor connection sleeve, 3...
- Reinforcement insulating layer, 4... Cable insulating layer, 5 -... Cable shielding layer, 6... Reinforcing shielding layer, 7... Cable sheath, ° 9... Junction box case, lO... Cable core , 11... Conductor movement amount detection device, 12 Electric cable
Pull connection box, 13. Permanent magnet, 14. Magnetic flux detection sensor, 15. Detection unit, 16. Lead wire, 17. Magnetic flux density display device, 18. Connector.
Claims (1)
た永久磁石と、前記導体接続スリーブを覆う補強絶縁層
の外周に設けられ前記永久磁石から発生する磁束を検出
するための磁束検出センサを含む検出部を備えたことを
特徴とする電力ケーブル接続箱の導体移動量検出装置。Detection including a permanent magnet provided on a conductor connection sleeve in a power cable connection box, and a magnetic flux detection sensor provided on the outer periphery of a reinforcing insulating layer covering the conductor connection sleeve for detecting magnetic flux generated from the permanent magnet. A device for detecting the amount of conductor movement in a power cable junction box, characterized by comprising: a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33953489A JPH03198615A (en) | 1989-12-27 | 1989-12-27 | Conductor shift detector for power cable connecting box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33953489A JPH03198615A (en) | 1989-12-27 | 1989-12-27 | Conductor shift detector for power cable connecting box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03198615A true JPH03198615A (en) | 1991-08-29 |
Family
ID=18328388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33953489A Pending JPH03198615A (en) | 1989-12-27 | 1989-12-27 | Conductor shift detector for power cable connecting box |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03198615A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5502280A (en) * | 1993-07-30 | 1996-03-26 | Etcon Corporation | Cable splice protector |
-
1989
- 1989-12-27 JP JP33953489A patent/JPH03198615A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5502280A (en) * | 1993-07-30 | 1996-03-26 | Etcon Corporation | Cable splice protector |
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