JP2001083203A - Method and apparatus for checking disconnection of hot- line deterioration diagnosing device - Google Patents
Method and apparatus for checking disconnection of hot- line deterioration diagnosing deviceInfo
- Publication number
- JP2001083203A JP2001083203A JP25619899A JP25619899A JP2001083203A JP 2001083203 A JP2001083203 A JP 2001083203A JP 25619899 A JP25619899 A JP 25619899A JP 25619899 A JP25619899 A JP 25619899A JP 2001083203 A JP2001083203 A JP 2001083203A
- Authority
- JP
- Japan
- Prior art keywords
- diagnostic
- live
- line
- disconnection
- cable
- 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.)
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Links
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、電力ケーブルの活
線劣化診断方法および診断用装置に関し、特にはCVケ
ーブルと称される、架橋ポリエチレン絶縁電力ケーブル
の活線状態での絶縁劣化を診断する方法および診断用装
置に関し、さらに詳しくは活線劣化診断における診断用
リード線を含む診断用装置の断線の有無をチェックする
方法と装置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 and a device for diagnosing hot wire deterioration of a power cable, and more particularly to diagnosing insulation deterioration of a crosslinked polyethylene insulated power cable in a live state, which is called a CV cable. The present invention relates to a method and an apparatus for diagnosis, and more particularly, to a method and an apparatus for checking the presence / absence of disconnection of a diagnosis apparatus including a diagnostic lead wire in a live-line deterioration diagnosis.
【0002】[0002]
【従来の技術】電力ケーブルの絶縁材料、特に高分子化
合物の絶縁材料は使用中に経年変化によりその絶縁特性
が劣化する。CVケーブルでは、主に水トリーによる劣
化が起こることが知られており、絶縁破壊による事故を
未然に防止するため、活線状態で絶縁劣化の度合いを診
断する方法が、例えば特開昭59−202074号およ
び特開昭59−202075号等に開示されている。こ
れらの方法は、劣化診断を行う電力ケーブルの遮蔽層と
アースの間に、遮蔽層側とアース側の2本の診断用リー
ド線を介して診断装置を接続し、水トリー等の絶縁体の
劣化部分によりCVケーブルの遮蔽層を流れる電流の直
流成分の大きさおよび極性を診断装置で測定して、水ト
リー等の大きさおよび位置を検知するものである。2. Description of the Related Art Insulating materials of power cables, particularly insulating materials of high molecular compounds, deteriorate in their insulation characteristics due to aging during use. It is known that deterioration due to water trees occurs mainly in CV cables. To prevent an accident due to insulation breakdown, a method of diagnosing the degree of insulation deterioration in a live state is disclosed in, for example, Japanese Patent Application Laid-Open No. 202074 and JP-A-59-202075. In these methods, a diagnostic device is connected between the shield layer of the power cable for performing the deterioration diagnosis and the ground via two diagnostic leads on the shield layer side and the ground side, and an insulator such as a water tree is connected. The magnitude and polarity of the DC component of the current flowing through the shielding layer of the CV cable due to the deteriorated portion are measured by a diagnostic device to detect the size and position of a water tree or the like.
【0003】しかしながら、上記の診断に用いる診断用
リード線には、接続作業や柱上への装架作業の引きまわ
しの際に張力等の機械的負荷が加わるため、導体部分の
断線が生じやすくなる。診断用リード線およびそれと協
同する活線劣化診断装置に断線が起こると、診断装置に
測定電流が流れず、測定対象である電力ケーブルが劣化
していないとの誤った判断がなされ、診断全体が無効な
ものとなる。これを防止するため、診断用リード線の断
線の有無をチェックする種々の方法が提案されてきた。
特に、図3にその概要を示す、特開平7−260849
号に開示されているような、活線劣化診断のために診断
用リード線を柱上に装架し、CVケーブルの遮蔽層に接
続して、絶縁劣化診断の直前に診断用リード線の断線を
その場でチェックすることが行われている。この方法で
は、診断対象の電力ケーブルの遮蔽層18とアースの間
に、診断用リード線17および17’を介して活線劣化
診断装置11を接続し、CVケーブルの遮蔽層18から
見て診断用リード線17および17’、診断装置11と
は並列に断線チェック装置12を挿入して、診断用リー
ド線17および17’、活線劣化診断装置11と共に閉
回路を構成して、断線チェック装置12の直流電源13
から直流電圧を印加し、抵抗器14に応じて閉回路に流
れる直流電流を測定することにより、診断用リード線1
7および17’の断線チェックを行っていた。[0003] However, a mechanical load such as tension is applied to the diagnostic lead wire used for the above-mentioned diagnosis during connection work or mounting work on a pole, so that the conductor is liable to be broken. Become. If a disconnection occurs in the diagnostic lead wire and the live-line degradation diagnostic device that cooperates with the diagnostic lead wire, the measurement current does not flow through the diagnostic device, and an erroneous determination is made that the power cable to be measured has not deteriorated. It will be invalid. In order to prevent this, various methods have been proposed for checking whether or not the diagnostic lead wire is disconnected.
In particular, FIG.
The diagnostic lead wire is mounted on a pillar for live line deterioration diagnosis and connected to the shielding layer of the CV cable as disclosed in the above item, and the diagnosis lead wire is disconnected immediately before the insulation deterioration diagnosis. Checking is done on the fly. In this method, the live-line degradation diagnostic device 11 is connected between the shield layer 18 of the power cable to be diagnosed and the ground via diagnostic leads 17 and 17 ′, and the diagnosis is performed from the shield layer 18 of the CV cable. The disconnection check device 12 is inserted in parallel with the diagnostic leads 11 and 17 ′ and the diagnostic device 11 to form a closed circuit together with the diagnostic leads 17 and 17 ′ and the live-line degradation diagnostic device 11. 12 DC power supplies 13
A DC voltage is applied to the diagnostic lead wire 1 by measuring a DC current flowing through a closed circuit according to the resistor 14.
The disconnection check of 7 and 17 'was performed.
【0004】[0004]
【発明が解決しようとする課題】この方法による断線チ
ェックは、CVケーブルの遮蔽層18から見て診断用リ
ード線17および17’、活線劣化診断装置11とは並
列に断線チェック装置12が用いられているため、柱上
の診断対象ケーブルの遮蔽層18に、遮蔽層側診断用リ
ード線17と断線チェック装置12の二つを並列に接続
することが必要で、柱上での作業が煩わしいものであっ
た。またその断線チェックの終了後に、活線劣化診断の
ために断線チェック装置を活線劣化診断装置から切り離
す必要があるが、測定対象の電力ケーブルのところまで
行き柱上の活線劣化診断装置を切り離すことは、活線劣
化診断装置と既設接地線が普通数十m、電力ケーブルの
設置状況によっては数百mも離れているので、大変面倒
なものであった。The disconnection check by this method is performed by the disconnection check device 12 in parallel with the diagnostic lead wires 17 and 17 ′ and the live-line degradation diagnostic device 11 as viewed from the shielding layer 18 of the CV cable. Therefore, it is necessary to connect the shielding layer side diagnostic lead wire 17 and the disconnection check device 12 in parallel to the shielding layer 18 of the cable to be diagnosed on the pillar, and the work on the pillar is troublesome. Was something. After the disconnection check is completed, it is necessary to disconnect the disconnection check device from the hot-line degradation diagnostic device for the hot-line degradation diagnosis, but disconnect the live-line degradation diagnostic device on the pole up to the power cable to be measured. This is very troublesome because the live-line degradation diagnostic device and the existing grounding wire are usually several tens of meters apart, and several hundred meters depending on the installation status of the power cable.
【0005】本発明の目的は、活線劣化診断用リード線
の断線チェックのための、煩瑣で面倒な断線チェック作
業を簡略化し、容易かつ確実に診断用リード線の断線の
有無をチェックすることを可能にする、方法と装置を提
供することである。本発明の他の目的は、活線劣化診断
用リード線の断線チェック装置が組み込まれた、容易か
つ確実に診断用リード線の断線の有無をチェックするこ
とを可能にする活線劣化診断装置を提供することであ
る。SUMMARY OF THE INVENTION It is an object of the present invention to simplify a troublesome and troublesome disconnection check operation for checking a lead wire for diagnosis of live-line deterioration, and to easily and surely check for a disconnection of a diagnostic lead wire. To provide a method and apparatus. Another object of the present invention is to provide a live-line deterioration diagnosis device incorporating a live-line deterioration diagnosis lead wire disconnection check device, which can easily and reliably check for the presence or absence of a break in a diagnosis lead wire. To provide.
【0006】[0006]
【課題を解決するための手段】上記の課題を解決するた
めに、本発明の請求項1に係る活線劣化診断装置の断線
チェック方法では、高圧CVケーブルの絶縁劣化を活線
下で診断する活線劣化診断試験において、CVケーブル
の遮蔽層から見て診断用リード線と直列に接続した断線
チェック装置により、診断用リード線と既設接地線を含
む閉回路を構成し、直流電圧を印加することを特徴とす
る。また本発明の請求項2に係る活線劣化診断装置の断
線チェック装置では、高圧CVケーブルの絶縁劣化を活
線下で診断する活線劣化診断試験において、CVケーブ
ルの遮蔽層から見て診断用リード線と直列に接続し、診
断用リード線と既設接地線を含む閉回路を構成し、直流
電圧を印加することにより断線チェックを行う断線チェ
ック回路を含むことを特徴とする。According to a first aspect of the present invention, there is provided a method for checking a disconnection of a high-voltage CV cable under a hot line. In the live line deterioration diagnosis test, a closed circuit including the diagnosis lead wire and the existing ground wire is formed by a disconnection check device connected in series with the diagnosis lead wire as viewed from the shielding layer of the CV cable, and a DC voltage is applied. It is characterized by the following. Further, in the disconnection check device of the live-line deterioration diagnosing device according to the second aspect of the present invention, in the live-line deterioration diagnostic test for diagnosing insulation deterioration of the high-voltage CV cable under the live line, the diagnosis is performed as viewed from the shielding layer of the CV cable. A closed circuit including a diagnostic lead and an existing ground line is connected in series with the lead, and a disconnection check circuit that performs a disconnection check by applying a DC voltage is included.
【0007】かかる構成により、本発明の請求項1また
は2に係る活線劣化診断装置の断線チェック方法または
断線チェック装置では、活線劣化診断装置の断線チェッ
ク装置が、CVケーブルの遮蔽層から見て遮蔽層側およ
びアース側の2本の診断用リード線と直列に接続されて
いるので、活線劣化診断のために遮蔽層側診断用リード
線を柱上のCVケーブルの遮蔽層に接続し、アース側診
断用リード線をアース側に接続するのみで、活線状態で
劣化診断を行うCVケーブルの遮蔽層と接続された遮蔽
層側診断用リード線およびアース側診断用リード線、既
設接地線および断線チェック装置が閉回路を構成するの
で、断線チェック装置に含まれる電源がこの閉回路に直
流電圧を印加すると、2本の診断用リード線および上記
閉回路を構成するその他の要素に断線があれば直流電流
が流れず、それらに断線がなければ印加電圧と回路の抵
抗値に応じた直流電流が流れる。このことにより、柱上
に断線チェック装置を装架する必要が無く、また断線チ
ェック終了後のチェック装置の切り離しのため診断対象
の電力ケーブルにアクセスする必要もなく、手元のスイ
ッチ操作で断線チェック装置の切り離しが可能な、きわ
めて容易かつ確実に診断用リード線の断線の有無を知る
ことができる。[0007] With this configuration, in the disconnection check method or the disconnection check device of the hot-line degradation diagnosis device according to claim 1 or 2 of the present invention, the disconnection check device of the hot-line degradation diagnosis device is viewed from the shield layer of the CV cable. The diagnostic lead is connected in series with the two diagnostic leads on the shield layer side and the ground side, so the diagnostic lead on the shield layer side is connected to the shield layer of the CV cable on the pole for live line deterioration diagnosis. The diagnostic lead and the diagnostic lead connected to the shield layer and the diagnostic lead connected to the shield layer of the CV cable for performing deterioration diagnosis in the live state only by connecting the ground diagnostic lead to the ground. Since the line and disconnection check device form a closed circuit, when a power supply included in the disconnection check device applies a DC voltage to the closed circuit, two diagnostic leads and the closed circuit are formed. Other elements are not direct current flows if disconnected, the DC current corresponding to the resistance value of the applied voltage and the circuit if there is disconnection thereof. As a result, there is no need to mount the disconnection check device on the pole, and it is not necessary to access the power cable to be diagnosed to disconnect the check device after the disconnection check is completed, and the disconnection check device can be operated with the switch at hand. It is possible to know very easily and surely whether the diagnostic lead wire is disconnected or not.
【0008】また本発明の請求項3に係る活線劣化診断
装置では、高圧CVケーブルの絶縁劣化を活線下で診断
する活線劣化診断試験において、CVケーブルの遮蔽層
から見て診断用リード線と直列に接続し、診断用リード
線と既設接地線を含む閉回路を構成し、直流電圧を印加
することにより断線チェックを行う断線チェック回路を
含む断線チェック装置、を組み込んだことを特徴とす
る。かかる構成により、本発明の請求項3に係る活線劣
化診断装置では、活線劣化診断に用いる診断用リード線
および既設接地線の回路配線の断線をチェックする装置
を診断装置自身に組み込んでいるので、特に別途の断線
チェック装置を携行しなくとも、活線劣化診断装置と診
断対象ケーブルの遮蔽層の間に2本の診断用リード線を
装架するのみで、活線劣化診断の直前に診断用リード線
および既設接地線またはそれらと活線劣化診断装置の断
線の有無をきわめて容易かつ確実にチェックすることが
できる。According to a third aspect of the present invention, there is provided an apparatus for diagnosing a deterioration of a high-voltage CV cable under a hot wire in a live-line deterioration diagnosis test, wherein the diagnostic lead is viewed from a shielding layer of the CV cable. A disconnection check device that includes a disconnection check circuit that performs a disconnection check circuit that performs a disconnection check by applying a DC voltage is connected, forming a closed circuit that includes a diagnostic lead wire and an existing ground wire connected in series with the wire. I do. With this configuration, in the live-line deterioration diagnostic apparatus according to the third aspect of the present invention, a diagnostic lead itself used for live-line deterioration diagnosis and a device for checking the disconnection of the circuit wiring of the existing ground line are incorporated in the diagnostic device itself. Therefore, without carrying a separate disconnection check device, only two diagnostic leads are mounted between the live wire deterioration diagnostic device and the shielding layer of the cable to be diagnosed. It is possible to check very easily and surely whether there is a disconnection between the diagnostic lead wire and the existing ground wire, or between them and the hot-line degradation diagnostic device.
【0009】[0009]
【発明の実施の形態】以下本発明に係る、活線劣化診断
装置の断線チェック方法および装置の実施の形態を、図
面に基づいて詳細に説明する。図1および図2は、本発
明に係る活線劣化診断装置の断線チェック装置による断
線チェックの実施の一例を示す、一部をブロック化した
活線劣化診断と断線チェックの説明図である。図1の例
では、断線チェック装置は活線劣化診断用リード線とは
直列に、在来品と同様の活線劣化診断装置とは並列に接
続され、一つの筐体内に一体化して組み込まれている。
図2の例では、断線チェック装置は活線劣化診断用リー
ド線とは直列、在来品と同様の活線劣化診断装置とは直
列に接続され、一つの筐体内に一体化して組み込まれて
いる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method and an apparatus for checking disconnection of a live-line deterioration diagnosis apparatus according to the present invention will be described below in detail with reference to the drawings. FIG. 1 and FIG. 2 are explanatory diagrams of a partly blocked live-line degradation diagnosis and a disconnection check, showing an example of the implementation of the disconnection check by the disconnection check device of the live-line degradation diagnostic device according to the present invention. In the example of FIG. 1, the disconnection check device is connected in series with the lead wire for live line deterioration diagnosis, and in parallel with the live line deterioration diagnostic device similar to a conventional product, and is integrated into one housing. ing.
In the example of FIG. 2, the disconnection check device is connected in series with the lead wire for live-line deterioration diagnosis, and connected in series with the live-line deterioration diagnostic device similar to a conventional product, and is integrated and integrated into one housing. I have.
【0010】図1において、活線劣化診断装置1内に組
み込まれた断線チェック装置2は、直流電源3、抵抗器
4、スイッチ5および直流電流計6を直列に配置した、
断線チェック回路を含んで構成されている。また活線劣
化診断の遮蔽層側診断用リード線7およびアース側診断
用リード線7’が、活線状態で劣化診断を行う診断対象
ケーブルの遮蔽層8、既設接地線9、および活線劣化診
断装置1内に組み込まれた断線チェック装置2と共に接
続されて閉回路を構成し、断線チェック装置2が診断用
リード線7および7’とは直列、活線劣化診断装置1と
は並列に接続されている。上記の構成により、図1に示
された断線チェック装置を用いて、診断対象のCVケー
ブルの絶縁劣化診断に先だち、それに用いる診断用リー
ド線7の断線チェックが実施される。そのため活線下に
おいて既設接地線9はオフにしたまま、断線チェック装
置2のスイッチ5をオフにすると、診断対象ケーブルの
遮蔽層8に接続された、診断用リード線7および7’、
断線チェック装置2が既設接地線9と共に閉回路を構成
する。このとき、断線チェック装置2が含む直流電源3
により、直流電圧を印加して上記閉回路に流れる電流を
直流電流計6で測定することで、診断用リード線7およ
び7’の断線の有無が判明する。即ち、断線がなければ
断線チェック装置2の抵抗器4の値に応じた電流が上記
の閉回路に流れ、断線があれば上記の閉回路に流れる電
流は0となる。本発明の図1の断線チェック装置2は活
線劣化診断装置1とは並列に接続され、かつスイッチ5
を含んでいるので、活線劣化診断時にはそのスイッチ5
を開放にすることにより、きわめて容易に断線チェック
装置2を活線劣化診断装置1から切り離すことができ
る。このため、断線チェック用の抵抗器4の値は断線チ
ェックの目的のためのみに随意に選択することができ、
直流電源3は携帯と入手の便を考え1.5Vの乾電池と
してもよく、適宜必要に応じ選択することができる。In FIG. 1, a disconnection check device 2 incorporated in a live-line deterioration diagnosis device 1 has a DC power supply 3, a resistor 4, a switch 5, and a DC ammeter 6 arranged in series.
It is configured to include a disconnection check circuit. In addition, the shielding layer side diagnostic lead 7 and the ground side diagnostic lead 7 ′ for the live line deterioration diagnosis are provided with the shield layer 8, the existing ground line 9, and the live line deterioration of the cable to be diagnosed for performing the deterioration diagnosis in the live state. It is connected with the disconnection check device 2 incorporated in the diagnostic device 1 to form a closed circuit, and the disconnection check device 2 is connected in series with the diagnostic leads 7 and 7 ′ and in parallel with the hot-line degradation diagnostic device 1. Have been. According to the above configuration, the disconnection check of the diagnostic lead wire 7 used for the diagnosis is performed before the insulation deterioration diagnosis of the CV cable to be diagnosed, using the disconnection check device shown in FIG. Therefore, when the switch 5 of the disconnection check device 2 is turned off while the existing ground wire 9 is turned off under the live line, the diagnostic lead wires 7 and 7 ′ connected to the shielding layer 8 of the cable to be diagnosed,
The disconnection check device 2 forms a closed circuit together with the existing ground wire 9. At this time, the DC power supply 3 included in the disconnection check device 2
By applying a DC voltage and measuring the current flowing through the closed circuit with the DC ammeter 6, the presence or absence of disconnection of the diagnostic leads 7 and 7 'can be determined. That is, if there is no disconnection, a current corresponding to the value of the resistor 4 of the disconnection check device 2 flows through the closed circuit, and if there is a disconnection, the current flowing through the closed circuit becomes zero. The disconnection check device 2 of FIG. 1 of the present invention is connected in parallel with the
Is included in the switch 5 at the time of live line deterioration diagnosis.
, The disconnection check device 2 can be very easily separated from the hot-line degradation diagnosis device 1. For this reason, the value of the resistor 4 for disconnection check can be arbitrarily selected only for the purpose of disconnection check,
The DC power supply 3 may be a 1.5V dry battery in consideration of the convenience of carrying and obtaining, and can be appropriately selected as needed.
【0011】図2において、活線劣化診断装置1の断線
チェック装置2は、直流電源3、抵抗器4、スイッチ5
および直流電流計6を直列に配置した、断線チェック回
路を含んで構成されている。また活線劣化診断の診断用
リード線7および7’が、活線状態で劣化診断を行う診
断対象ケーブルの遮蔽層8、既設接地線9、および活線
劣化診断装置1と共に接続されて閉回路を構成し、断線
チェック装置2が診断用リード線7および7’、活線劣
化診断装置1と直列に接続されている。上記の構成によ
り、図2に示された断線チェック装置を用いて、診断対
象のCVケーブルの絶縁劣化診断に先だち、それに用い
る診断用リード線7および活線劣化診断装置1の断線チ
ェックが実施される。そのため活線下において既設接地
線9はオフにしたまま、断線チェック装置2のスイッチ
5を断線チェック装置側に切り替えると、診断対象ケー
ブルの遮蔽層8に接続された診断用リード線7と、活線
劣化診断装置1および断線チェック装置2が既設接地線
9と共に閉回路を構成する。このとき、断線チェック装
置2が含む直流電源3により、直流電圧を印加して上記
閉回路に流れる電流を測定することで、診断用リード線
7および活線劣化診断装置1の断線の有無が判明する。
即ち、断線がなければ断線チェック装置2の抵抗器4の
値に応じた電流が上記の閉回路に流れ、断線があれば上
記の閉回路に流れる電流は0となる。本発明の図2の断
線チェック装置2は活線劣化診断装置1とは直列に接続
され、かつスイッチ5を含んでいるので、活線劣化診断
時にはそのスイッチ5を診断装置側に切り替えることに
より、きわめて容易に断線チェック装置2を活線劣化診
断装置1から切り離すことができる。このため、断線チ
ェック用の抵抗器4の値は断線チェックの目的のための
みに随意に選択することができ、直流電源3は携帯と入
手の便を考え1.5Vの乾電池としてもよく、適宜選択
することができる。In FIG. 2, a disconnection check device 2 of a live-line deterioration diagnosis device 1 includes a DC power supply 3, a resistor 4, a switch 5,
And a disconnection check circuit in which the DC ammeter 6 is arranged in series. The diagnostic lead wires 7 and 7 ′ for the live-line deterioration diagnosis are connected together with the shield layer 8, the existing ground line 9, and the live-line deterioration diagnosis device 1 of the cable to be diagnosed for performing the deterioration diagnosis in the live state and closed circuit. The disconnection check device 2 is connected in series with the diagnostic lead wires 7 and 7 ′ and the live-line degradation diagnostic device 1. According to the above configuration, before the insulation deterioration diagnosis of the CV cable to be diagnosed is performed, the disconnection check of the diagnostic lead wire 7 and the live-line deterioration diagnosis device 1 is performed using the disconnection check device shown in FIG. You. Therefore, when the switch 5 of the disconnection check device 2 is switched to the disconnection check device side while the existing ground wire 9 is turned off under the live line, the diagnostic lead wire 7 connected to the shielding layer 8 of the cable to be diagnosed is connected to the active wire. The line deterioration diagnosis device 1 and the disconnection check device 2 constitute a closed circuit together with the existing ground line 9. At this time, the DC power supply 3 included in the disconnection check device 2 applies a DC voltage and measures the current flowing in the closed circuit to determine whether the diagnostic lead wire 7 and the hot-line degradation diagnostic device 1 are disconnected. I do.
That is, if there is no disconnection, a current corresponding to the value of the resistor 4 of the disconnection check device 2 flows through the closed circuit, and if there is a disconnection, the current flowing through the closed circuit becomes zero. Since the disconnection check device 2 of FIG. 2 of the present invention is connected in series with the hot-line deterioration diagnostic device 1 and includes the switch 5, the switch 5 is switched to the diagnostic device side at the time of hot-line deterioration diagnosis. The disconnection check device 2 can be very easily separated from the live-line deterioration diagnosis device 1. For this reason, the value of the resistor 4 for disconnection check can be arbitrarily selected only for the purpose of disconnection check, and the DC power supply 3 may be a 1.5 V dry battery in consideration of convenience in carrying and obtaining. You can choose.
【0012】活線劣化診断の実施に際しては、本発明に
係る断線チェックを実施して活線劣化診断用リード線7
または活線劣化診断用リード線と活線劣化診断装置1に
異常がないことを確認した後、図1の場合は上記のスイ
ッチ5を開にする事で、また図2の場合は上記のスイッ
チ5を活線劣化診断装置側に切り替えることで、断線チ
ェック装置2を活線劣化診断装置1から切り離し、既設
接地線9を開放して従来通りの通常の活線劣化診断を行
えばよい。本発明に係る断線チェック装置に必要な回路
要素は、活線劣化診断装置に必要な回路要素と共通して
いるので断線チェック時と活線劣化診断時に転用が可能
である。例えば、断線チェック装置の直流電源は、通常
活線劣化診断装置がシース絶縁抵抗の測定用に内蔵して
いる直流電源を転用することができ、図2に示された活
線劣化診断装置においては、断線チェック装置と活線劣
化診断装置とが直列に接続されているので、本例では断
線チェック装置に別途に配置した直流電流計6を、劣化
診断用の直流電流計で代用して断線チェック装置のコス
トダウンを図ることができる。When performing the hot-line deterioration diagnosis, a disconnection check according to the present invention is performed to determine the live-line deterioration diagnosis lead wire 7.
Alternatively, after confirming that there is no abnormality in the hot-wire deterioration diagnosis lead wire and the hot-line deterioration diagnosis device 1, the switch 5 is opened in the case of FIG. 1 and the switch 5 in the case of FIG. By switching 5 to the hot-line degradation diagnostic device side, the disconnection check device 2 may be separated from the hot-line degradation diagnostic device 1, the existing ground wire 9 may be opened, and a conventional normal hot-line degradation diagnosis may be performed. The circuit elements required for the disconnection check device according to the present invention are common to the circuit elements required for the hot-line degradation diagnosis device, so that they can be diverted at the time of disconnection check and hot-line degradation diagnosis. For example, the DC power supply of the disconnection check device can be diverted from the DC power supply that is usually incorporated in the live-line deterioration diagnosis device for measuring the sheath insulation resistance. In the live-line deterioration diagnosis device shown in FIG. Since the disconnection check device and the live-line degradation diagnosis device are connected in series, in this example, the disconnection check is performed by substituting the DC ammeter 6 separately provided for the disconnection check device with the DC ammeter for degradation diagnosis. The cost of the device can be reduced.
【0013】[0013]
【発明の効果】以上に説明したように、本発明に係る活
線劣化診断装置の断線チェック方法および装置では、C
Vケーブルの遮蔽層から見て診断用リード線とは直列、
活線劣化診断装置とは並列または直列に断線チェック装
置を接続したので、活線劣化診断用リード線の断線チェ
ックのために柱上の診断対象ケーブルの遮蔽層に断線チ
ェック装置を装架する必要がなく、断線チェックの終了
後に活線劣化診断のために測定対象のCVケーブルのと
ころまで行き柱上の断線チェック装置を切り離す必要も
ないので、煩瑣で面倒な断線チェック作業を簡略化し、
容易かつ確実に診断用リード線の断線の有無をチェック
することを可能にする、方法と装置が提供される。ま
た、本発明に係る活線劣化診断装置の断線チェック装置
は、CVケーブルの遮蔽層から見て診断用リード線とは
直列に接続されているので、断線チェック装置が一体化
して組み込まれた、容易かつ確実に診断用リード線の断
線の有無をチェックすることを可能にする活線劣化診断
装置が提供される。As described above, according to the method and the apparatus for checking the disconnection of the apparatus for diagnosing hot-line deterioration according to the present invention, the C
As seen from the V cable shield layer, it is in series with the diagnostic lead wire,
Since the disconnection check device is connected in parallel or in series with the hot-line deterioration diagnosis device, it is necessary to mount the disconnection check device on the shield layer of the cable to be diagnosed on the pole to check the disconnection of the lead wire for live-line deterioration diagnosis. There is no need to disconnect the disconnection check device on the pole up to the CV cable to be measured after the completion of the disconnection check for live-line deterioration diagnosis, simplifying the troublesome and troublesome disconnection check work.
A method and apparatus are provided that enable easy and reliable checking of diagnostic leads for disconnections. In addition, the disconnection check device of the live-line deterioration diagnostic device according to the present invention is connected in series with the diagnostic lead wire as viewed from the shielding layer of the CV cable. An apparatus for diagnosing live-line deterioration that enables easy and reliable checking of the presence or absence of disconnection of a diagnostic lead wire is provided.
【図1】本発明の断線チェック装置の一例を含む、活線
劣化診断の説明図。FIG. 1 is an explanatory diagram of a live-line deterioration diagnosis including an example of a disconnection check device of the present invention.
【図2】本発明の断線チェック装置の他の例を含む、活
線劣化診断の説明図。FIG. 2 is an explanatory diagram of a live-line deterioration diagnosis including another example of the disconnection check device of the present invention.
【図3】従来の断線チェック装置の一例。FIG. 3 is an example of a conventional disconnection check device.
1 活線劣化診断装置 1’ 活線劣化診断回路 2 断線チェック装置 3 直流電源 4 抵抗器 5 スイッチ 6 直流電流計 7 遮蔽層側診断用リード線 7’ アース側診断用リード線 8 診断対象ケーブルの遮蔽層 9 既設接地線 DESCRIPTION OF SYMBOLS 1 Hot-line deterioration diagnostic device 1 'Hot-line deterioration diagnostic circuit 2 Disconnection check device 3 DC power supply 4 Resistor 5 Switch 6 DC ammeter 7 Shielding layer side diagnostic lead wire 7' Earth side diagnostic lead wire 8 Shielding layer 9 Existing ground wire
───────────────────────────────────────────────────── フロントページの続き (72)発明者 堀田 昌弘 静岡県沼津市大岡2771 矢崎電線株式会社 内 Fターム(参考) 2G014 AA02 AB34 AC19 2G015 AA27 BA05 BA09 CA20 DA04 2G028 AA02 AA03 BB20 BF10 DH03 LR01 MS01 MS03 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masahiro Hotta 2771 Ooka, Numazu-shi, Shizuoka Yazaki Electric Wire Co., Ltd. F-term (reference) 2G014 AA02 AB34 AC19 2G015 AA27 BA05 BA09 CA20 DA04 2G028 AA02 AA03 BB20 BF10 DH03 LR01 MS01 MS03
Claims (3)
診断する活線劣化診断試験において、CVケーブルの遮
蔽層から見て診断用リード線と直列に接続した断線チェ
ック装置により、診断用リード線と既設接地線を含む閉
回路を構成し、直流電圧を印加することを特徴とする活
線劣化診断装置の断線チェック方法。In a live-line deterioration diagnosis test for diagnosing insulation deterioration of a high-voltage CV cable under a live line, a diagnostic lead is connected by a disconnection check device connected in series with a diagnostic lead as viewed from a shielding layer of the CV cable. A method for checking disconnection of a live-line deterioration diagnostic device, comprising forming a closed circuit including a wire and an existing ground wire, and applying a DC voltage.
診断する活線劣化診断試験において、CVケーブルの遮
蔽層から見て診断用リード線と直列に接続し、診断用リ
ード線と既設接地線を含む閉回路を構成し、直流電圧を
印加することにより断線チェックを行う断線チェック回
路を含むことを特徴とする活線劣化診断装置の断線チェ
ック装置。2. A live-line deterioration diagnosis test for diagnosing insulation deterioration of a high-voltage CV cable under a live line, connecting the diagnostic lead in series with a diagnostic lead viewed from a shielding layer of the CV cable, and connecting the diagnostic lead to an existing ground. A disconnection check device for a live-line deterioration diagnosis device, comprising a disconnection check circuit that forms a closed circuit including a wire and performs a disconnection check by applying a DC voltage.
診断する活線劣化診断試験において、CVケーブルの遮
蔽層から見て診断用リード線と直列に接続し、診断用リ
ード線と既設接地線を含む閉回路を構成し、直流電圧を
印加することにより断線チェックを行う断線チェック回
路を含む断線チェック装置を組み込んだことを特徴とす
る活線劣化診断装置。3. A live-line deterioration diagnostic test for diagnosing insulation deterioration of a high-voltage CV cable under a live line, connecting the diagnostic lead in series with a diagnostic lead viewed from a shielding layer of the CV cable, and connecting the diagnostic lead to an existing ground. A live-line deterioration diagnosis device comprising a closed-circuit check device including a closed-circuit check circuit for forming a closed circuit including a wire and performing a disconnection check by applying a DC voltage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25619899A JP2001083203A (en) | 1999-09-09 | 1999-09-09 | Method and apparatus for checking disconnection of hot- line deterioration diagnosing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25619899A JP2001083203A (en) | 1999-09-09 | 1999-09-09 | Method and apparatus for checking disconnection of hot- line deterioration diagnosing device |
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Publication Number | Publication Date |
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JP2001083203A true JP2001083203A (en) | 2001-03-30 |
Family
ID=17289283
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JP25619899A Pending JP2001083203A (en) | 1999-09-09 | 1999-09-09 | Method and apparatus for checking disconnection of hot- line deterioration diagnosing device |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009012595A (en) * | 2007-07-04 | 2009-01-22 | Nippon Densetsu Kogyo Co Ltd | Earthing wire mounting confirmation device |
JP2011075279A (en) * | 2009-09-29 | 2011-04-14 | Ud Trucks Corp | Inspection device and inspection method |
KR101206554B1 (en) | 2011-09-29 | 2012-11-29 | 한국전력공사 | Apparatus for checking reliability of partial discharge diagnosing equipment |
JP2018164358A (en) * | 2017-03-25 | 2018-10-18 | 東京電力ホールディングス株式会社 | Disconnection discrimination device and wiring discrimination device of DC power supply circuit |
-
1999
- 1999-09-09 JP JP25619899A patent/JP2001083203A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009012595A (en) * | 2007-07-04 | 2009-01-22 | Nippon Densetsu Kogyo Co Ltd | Earthing wire mounting confirmation device |
JP2011075279A (en) * | 2009-09-29 | 2011-04-14 | Ud Trucks Corp | Inspection device and inspection method |
KR101206554B1 (en) | 2011-09-29 | 2012-11-29 | 한국전력공사 | Apparatus for checking reliability of partial discharge diagnosing equipment |
JP2018164358A (en) * | 2017-03-25 | 2018-10-18 | 東京電力ホールディングス株式会社 | Disconnection discrimination device and wiring discrimination device of DC power supply circuit |
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