JPH0591638A - Detecting method for malfunction of cable connector - Google Patents

Detecting method for malfunction of cable connector

Info

Publication number
JPH0591638A
JPH0591638A JP24975791A JP24975791A JPH0591638A JP H0591638 A JPH0591638 A JP H0591638A JP 24975791 A JP24975791 A JP 24975791A JP 24975791 A JP24975791 A JP 24975791A JP H0591638 A JPH0591638 A JP H0591638A
Authority
JP
Japan
Prior art keywords
connecting portion
detecting
cable
partial discharge
abnormality
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
Application number
JP24975791A
Other languages
Japanese (ja)
Inventor
Jiro Kawai
二郎 川井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SWCC Corp
Original Assignee
Showa Electric Wire and Cable Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Electric Wire and Cable Co filed Critical Showa Electric Wire and Cable Co
Priority to JP24975791A priority Critical patent/JPH0591638A/en
Publication of JPH0591638A publication Critical patent/JPH0591638A/en
Pending legal-status Critical Current

Links

Landscapes

  • Testing Relating To Insulation (AREA)
  • Locating Faults (AREA)
  • Cable Accessories (AREA)

Abstract

PURPOSE:To provide a method of early detecting such a malfunction of a cable connector as an improper construction of the connector. CONSTITUTION:An antenna 16 for detecting an electromagnetic wave to be radiated due to a partial discharge is arranged in a metal body tube 10 constituting a cable connector. If a malfunction such as an improper construction exists at the connector, a partial discharge occurs in the malfunctioned part to generate an electromagnetic wave. This wave is detected by the antenna 16, and its voltage is measured by a measuring instrument 18.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、ケーブル接続部、特に
プレハブ形接続部の主な絶縁破壊原因である施工不良な
どを早期に検出することができるケーブル接続部の異常
検出方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting an abnormality in a cable connecting portion, which is capable of early detecting a construction failure or the like, which is a main cause of dielectric breakdown of a cable connecting portion, particularly a prefabricated type connecting portion. .

【0002】[0002]

【従来の技術】近年、CVケーブル用の中間接続部とし
て、ユニット化された部品を現場で組立てて接続部を完
成させるプレハブ形接続部が実用化されており、このプ
レハブ形接続部は、加熱工程が不要であるため、押出し
モールド形接続部に比べ大幅に施工時間の短縮化が図
れ、かつ施工管理が容易であるといった利点がある。
2. Description of the Related Art In recent years, a prefabricated type connecting portion for assembling unitized parts on site to complete the connecting portion has been put into practical use as an intermediate connecting portion for a CV cable. Since no process is required, there are advantages that the construction time can be greatly shortened and construction management is easy compared with the extrusion mold type connection part.

【0003】[0003]

【発明が解決しようとする課題】ところで、このような
プレハブ形接続部では、施工不良があったり、あるいは
施工の際にエポキシユニットやゴムモールドストレスコ
ーンなどの部品が損傷を受けると、運転状態になったと
きに部分放電が発生し、ついには絶縁破壊事故に至る可
能性がある。したがって、絶縁破壊事故に至る前に、接
続部で発生する部分放電を早期に検出して、絶縁破壊事
故を未然に防止することがケーブル線路の信頼性を高め
る上で重要である。そこで、本発明は、上記実情を考慮
して案出されたものであり、プレハブ形接続部などのケ
ーブル接続部の異常を早期に検出でき、以て、ケーブル
接続部の絶縁破壊事故を未然に防止することができるケ
ーブル接続部の異常検出方法を提供することを目的とし
ている。
By the way, in such a prefabricated type connecting portion, if there is a construction defect or a component such as an epoxy unit or a rubber mold stress cone is damaged during the construction, it will be in an operating state. When this happens, a partial discharge will occur, which may eventually lead to a dielectric breakdown accident. Therefore, it is important to detect the partial discharge occurring at the connection part early and prevent the dielectric breakdown accident before the dielectric breakdown accident, in order to improve the reliability of the cable line. Therefore, the present invention has been devised in consideration of the above circumstances, and it is possible to detect an abnormality in a cable connecting portion such as a prefabricated type connecting portion at an early stage, and thus to prevent an accidental breakdown of the cable connecting portion. It is an object of the present invention to provide a method for detecting an abnormality in a cable connecting portion that can be prevented.

【0004】[0004]

【課題を解決するための手段】前記課題を解決するた
め、本発明は遮蔽導体を有するケーブル相互を接続する
ケーブル接続部の異常検出方法であって、前記接続部を
構成する外部導体内に、部分放電に起因して発生する電
磁波を検出する検出手段を設け、この検出手段の出力に
基づいて前記接続部の異常を検出することを特徴とす
る。
In order to solve the above-mentioned problems, the present invention is a method for detecting an abnormality in a cable connecting portion for connecting cables having shielded conductors, the method comprising: A detecting means for detecting an electromagnetic wave generated due to the partial discharge is provided, and the abnormality of the connecting portion is detected based on the output of the detecting means.

【0005】[0005]

【作用】本発明では、ケーブル接続部の施工不良や部品
の損傷に起因して部分放電が発生すると、この部分放電
に起因して電磁波が生じるため、この電磁波を検出する
ことにより、ケーブル接続部の異常を検出することがで
きる。
According to the present invention, when a partial discharge occurs due to defective construction of the cable connecting portion or damage to parts, an electromagnetic wave is generated due to this partial discharge. Therefore, by detecting this electromagnetic wave, the cable connecting portion can be detected. Can detect abnormalities.

【0006】[0006]

【実施例】以下、本発明の好適一実施例を添付図面に基
づいて説明する。第1図はプレハブ形の絶縁接続部の構
成図である。第1図に示すように、CVケーブル1の端
部は、外部半導電層(不図示)、絶縁体2、内部半導電
層(不図示)が段剥されて導体3が露出しており、この
導体3,3の先端部は、導体接続管5に挿入され、この
導体接続管5が圧縮されて導体3,3が接続されてい
る。尚、第1図において符号4はCVケーブル1の遮蔽
導体を示している。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of a prefabricated type insulation connection portion. As shown in FIG. 1, at the end of the CV cable 1, the outer semiconductive layer (not shown), the insulator 2, and the inner semiconductive layer (not shown) are stepped off to expose the conductor 3. The tip ends of the conductors 3, 3 are inserted into the conductor connecting pipe 5, and the conductor connecting pipe 5 is compressed to connect the conductors 3, 3. In FIG. 1, reference numeral 4 indicates a shield conductor of the CV cable 1.

【0007】導体接続管5の外周には、エポキシユニッ
ト6に埋め込まれた遮蔽電極7が設けられており、ま
た、CVケーブル1の端部には、ゴムモールドストレス
コーン(以下、ストレスコーンと称す)8が挿入されて
いる。ストレスコーン8の傾斜部8aは、エポキシユニ
ット6の傾斜部6aに嵌合しており、エポキシユニット
6の両端部側に設けられたスプリングユニット(不図
示)によってストレスコーン8に押圧力が加えら、この
押圧力によってストレスコーン8の傾斜部8aがエポキ
シユニット6の傾斜部6aに密着して所定の面圧を維持
するように構成されている。
A shield electrode 7 embedded in an epoxy unit 6 is provided on the outer periphery of the conductor connecting tube 5, and a rubber mold stress cone (hereinafter referred to as a stress cone) is provided at the end of the CV cable 1. ) 8 is inserted. The inclined portion 8a of the stress cone 8 is fitted to the inclined portion 6a of the epoxy unit 6, and a pressing force is applied to the stress cone 8 by spring units (not shown) provided on both end sides of the epoxy unit 6. By this pressing force, the inclined portion 8a of the stress cone 8 is in close contact with the inclined portion 6a of the epoxy unit 6 to maintain a predetermined surface pressure.

【0008】一方、エポキシユニット6などを覆う金属
胴管10は、本体部11と、その一端側に配置された端
部12とから構成され、この本体部11と端部12と
は、絶縁筒13を介して絶縁ボルト(不図示)で固定さ
れて縁切部14を構成し、この縁切部14によって本体
部11と端部12とがその長さ方向に電気的に分離され
ている。尚、本体部11の他方の端部および端部12
は、CVケーブル1,1の遮蔽導体4,4に接続されて
いる。
On the other hand, the metal barrel 10 covering the epoxy unit 6 and the like is composed of a main body portion 11 and an end portion 12 arranged at one end side thereof, and the main body portion 11 and the end portion 12 are insulated cylinders. It is fixed with an insulating bolt (not shown) through 13 to form an edge cut portion 14, and the edge cut portion 14 electrically separates the main body portion 11 and the end portion 12 in the length direction. The other end and the end 12 of the main body 11 are
Are connected to the shield conductors 4, 4 of the CV cables 1, 1.

【0009】金属胴管10の本体部11と端部12とで
画成された空間15内には、部分放電に起因して放射す
る電磁波を検出するためのアンテナ16が配設されてお
り、このアンテナ16に誘起された電圧は、絶縁筒13
を径方向に貫通して設けられたリード線17を介して測
定器18に伝送される。
An antenna 16 for detecting electromagnetic waves radiated due to partial discharge is provided in a space 15 defined by the main body 11 and the end 12 of the metal body tube 10. The voltage induced in the antenna 16 is the insulating cylinder 13
Is transmitted to the measuring instrument 18 via a lead wire 17 provided so as to penetrate through the wire in the radial direction.

【0010】以上の構成において、絶縁接続部にストレ
スコーン8の嵌合不全やストレスコーン8の面圧不均一
などの施工不良があったり、あるいは施工の際にエポキ
シユニット6やストレスコーン8などの部品が損傷を受
けていると、ケーブル線路の運転開始後、施工不良部や
損傷部で部分放電が発生し、この部分放電に起因して電
磁波が放射される。この電磁波は、アンテナ16に電圧
を誘起させ、この電圧は、リード線17を介して測定器
18に伝送される。したがって、本実施例によれば、施
工不良部や損傷部で発生する部分放電に起因して生じる
電磁波をアンテナ16で検出し、その電圧を測定器18
で測定することにより絶縁接続部の施工不良や部品の損
傷を早期に検出することができ、以て、ケーブル接続部
の絶縁破壊事故を未然に防止することができる。また、
本実施例によれば、アンテナ16が金属胴管10内に配
設されており、金属胴管10が外来雑音電波の侵入を防
止するシールドととして機能するため、部分放電検出に
おけるS/Nを高めることができ、以て、ケーブル接続
部の異常検出精度を高めることができる。
In the above construction, there is a construction failure such as a failure of fitting of the stress cone 8 in the insulating connection portion or non-uniform pressure of the stress cone 8, or the epoxy unit 6 or the stress cone 8 is not attached during the construction. If the parts are damaged, a partial discharge will occur at the defective construction part or the damaged part after the start of the operation of the cable line, and electromagnetic waves will be emitted due to this partial discharge. This electromagnetic wave induces a voltage in the antenna 16, and this voltage is transmitted to the measuring instrument 18 via the lead wire 17. Therefore, according to this embodiment, the antenna 16 detects an electromagnetic wave generated due to a partial discharge generated at a defective construction portion or a damaged portion, and the voltage thereof is measured by the measuring device 18.
It is possible to detect the construction failure of the insulation connection portion and the damage to the parts at an early stage by measuring with, and thus it is possible to prevent the dielectric breakdown accident of the cable connection portion. Also,
According to the present embodiment, since the antenna 16 is arranged inside the metal barrel 10, and the metal barrel 10 functions as a shield for preventing the intrusion of external noise radio waves, the S / N ratio for detecting partial discharge is reduced. Therefore, the accuracy of detecting an abnormality in the cable connecting portion can be improved.

【0011】尚、上記実施例では、プレハブ形の絶縁接
続部の異常検出を例示したが、本発明は、絶縁接続部だ
けでなくプレハブ形の普通接続部の異常検出に適用する
こともできる。この場合は、第1図において縁切部14
を省略すればよい。すなわち、第1図において絶縁筒1
3を省略するか、または、本体部11と端部12とをリ
ード線で接続すればよい。また、本発明は、プレハブ形
以外の接続部の異常検出に適用することもできるのは勿
論である。
In the above embodiment, the abnormality detection of the prefabricated type insulation connection portion is illustrated, but the present invention can be applied to the abnormality detection of the prefabricated type normal connection portion as well as the insulation connection portion. In this case, the edge cut portion 14 in FIG.
Can be omitted. That is, the insulating cylinder 1 in FIG.
3 may be omitted, or the main body 11 and the end 12 may be connected by a lead wire. The present invention can of course be applied to the detection of an abnormality in a connection portion other than the prefabricated type.

【0012】[0012]

【発明の効果】以上説明したように、本発明によれば、
プレハブ形接続部などのケーブル接続部の異常を早期に
検出でき、これにより、ケーブル接続部の絶縁破壊事故
を未然に防止することができる。
As described above, according to the present invention,
It is possible to detect an abnormality in the cable connection portion such as the prefabricated connection portion at an early stage, and thereby prevent an accidental breakdown of the cable connection portion.

【図面の簡単な説明】[Brief description of drawings]

【図1】プレハブ形の絶縁接続部の構成図。FIG. 1 is a configuration diagram of a prefabricated insulating connection portion.

【符号の説明】[Explanation of symbols]

1…………CVケーブル 3…………導体 4…………遮蔽導体 6…………エポキシユニット 8…………ストレスコーン 10………金属胴管 11………本体部 12………端部 13………絶縁筒 14………縁切部 16………アンテナ 18………測定器 1 ………… CV cable 3 ………… conductor 4 ………… shielding conductor 6 ………… epoxy unit 8 ………… stress cone 10 ………… metal shell 11 ………… main body 12 …… … End 13 ………… Insulation cylinder 14 ………… Edge cutoff 16 ………… Antenna 18 ………… Measuring instrument

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】遮蔽導体を有するケーブル相互を接続する
ケーブル接続部の異常検出方法であって、 前記接続部を構成する外部導体内に、部分放電に起因し
て発生する電磁波を検出する検出手段を設け、この検出
手段の出力に基づいて前記接続部の異常を検出すること
を特徴とするケーブル接続部の異常検出方法。
1. A method for detecting abnormality in a cable connecting portion for connecting cables having shield conductors, wherein the detecting means detects an electromagnetic wave generated in the outer conductor forming the connecting portion due to partial discharge. And detecting the abnormality of the connecting portion based on the output of the detecting means.
【請求項2】前記ケーブル接続部は、プレハブ形接続部
であることを特徴とする請求項1記載のケーブル接続部
の異常検出方法。
2. The method for detecting an abnormality in a cable connecting portion according to claim 1, wherein the cable connecting portion is a prefabricated type connecting portion.
JP24975791A 1991-09-27 1991-09-27 Detecting method for malfunction of cable connector Pending JPH0591638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24975791A JPH0591638A (en) 1991-09-27 1991-09-27 Detecting method for malfunction of cable connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24975791A JPH0591638A (en) 1991-09-27 1991-09-27 Detecting method for malfunction of cable connector

Publications (1)

Publication Number Publication Date
JPH0591638A true JPH0591638A (en) 1993-04-09

Family

ID=17197779

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24975791A Pending JPH0591638A (en) 1991-09-27 1991-09-27 Detecting method for malfunction of cable connector

Country Status (1)

Country Link
JP (1) JPH0591638A (en)

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