JPS5841472B2 - The actual cable is not available. - Google Patents
The actual cable is not available.Info
- Publication number
- JPS5841472B2 JPS5841472B2 JP47111847A JP11184772A JPS5841472B2 JP S5841472 B2 JPS5841472 B2 JP S5841472B2 JP 47111847 A JP47111847 A JP 47111847A JP 11184772 A JP11184772 A JP 11184772A JP S5841472 B2 JPS5841472 B2 JP S5841472B2
- Authority
- JP
- Japan
- Prior art keywords
- cable
- alarm
- ground
- insulation resistance
- lower limit
- 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
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Gas Or Oil Filled Cable Accessories (AREA)
Description
【発明の詳細な説明】
本発明は多数条ケーブルの防食層絶縁抵抗の監視を自動
的に行わしめる装置を提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an apparatus for automatically monitoring the insulation resistance of a corrosion protection layer of a multi-filament cable.
従来此種の装置は第２図に示す如く、例えばケブル１か
らケー プル３までを監視するものとすると、これらの
金属じゃへいを一括して判定装置１に導く、一括した金
属しゃへいと大地間には静電容量Ｃが接続されている。Conventionally, this type of device is used to monitor cables 1 to 3, for example, as shown in Figure 2, and to guide these metal shields all at once to the determination device 1, and to connect the metal shield to the ground. A capacitance C is connected to.
判定装置１には測定用電源が大地との間に挿入されてい
て、ケーブル群は常時大地から浮かされている。A power source for measurement is inserted between the determination device 1 and the ground, and the cable group is always suspended from the ground.
全ケーブルの防食層絶縁の並列抵抗値が予め定められた
下限抵抗値を割ると警報を発するようになっている。If the parallel resistance value of the anti-corrosion layer insulation of all cables falls below a predetermined lower limit resistance value, an alarm will be issued.
このようなものは一群のケーブルの金属しゃへいが一括
されて監視されているため、いったん警報が出た時は全
停電をして金属しゃへいの一括結線を解きケーブル−条
宛絶縁抵抗を測定する等の方法で不良ケーブルを見つけ
出すより仕方がないので警報を受けてからどのケーブル
が不良であるかを探し出すことが必要で、それが困難な
作業である。In this type of equipment, the metal shielding of a group of cables is monitored all at once, so once an alarm is issued, the entire power is shut off, the metal shielding is untied all at once, and the insulation resistance between the cables and the strips is measured. There is no other choice than finding the defective cable using the above method, so it is necessary to find out which cable is defective after receiving the alarm, which is a difficult task.
またすべてのケーブルの絶縁抵抗が並列となるので例え
ば夫々のケーブルの絶縁抵抗値は良好でも並列抵抗値は
低くなり、１条のケーブルで必要とする下限抵抗値に接
近する。Furthermore, since the insulation resistances of all the cables are parallel, for example, even if the insulation resistance value of each cable is good, the parallel resistance value becomes low and approaches the lower limit resistance value required for one cable.
すべてのケーブルの下限抵抗値の並列値をもって警報限
界とすると、１条のみの絶縁抵抗値が悪くなっても警報
が出ないことがある。If the alarm limit is set as the parallel value of the lower limit resistance values of all cables, an alarm may not be issued even if the insulation resistance value of only one cable becomes poor.
即ち監視精度が悪く、必要もないのに警報が出たり、必
要な時に警報が出なかったりする。In other words, the accuracy of monitoring is poor, and alarms may be issued even when they are not necessary, or may not be issued when necessary.
またすべてのケーブルの金属じゃへいが常時大地から浮
いており、交流的には静電容量Ｃを通して接地されてい
るに過ぎない、もし１条のケーブルに電気破壊が起れば
その金属しゃへいが直接接地されている場合に比して金
属しゃへい電位の異常上昇は避は難く、しかもその電位
が他のケーブル金属しゃへいにも侵入し、副次的に種々
の好ましくない現象が起り得る。Also, the metal shield of all cables is always floating above the ground, and in terms of AC, it is only grounded through the capacitance C. If an electrical breakdown occurs in one cable, the metal shield will be directly connected to the ground. It is difficult to avoid an abnormal increase in the metal shielding potential compared to the case where the cable is grounded, and moreover, this potential can also invade other cable metal shields, and various undesirable phenomena may occur as a side effect.
、要するにケーブルの運転システムとしてこの様な接地
系態は不都合であり、安全性がない。In short, such a grounding system is inconvenient and unsafe as a cable operating system.
その信地下埋設物に電食障害を与えるおそれがある等の
欠点があった。There were drawbacks such as the risk of electrolytic corrosion damage to the underground underground structures.
本発明は以上の欠点を解決する目的でなされたものであ
り、以下第１図に示す本発明の実施例について詳述する
。The present invention has been made for the purpose of solving the above-mentioned drawbacks, and an embodiment of the present invention shown in FIG. 1 will be described in detail below.
図においてＡＩ、２，３・・・・・・ｎ−１，ｎは夫々
防食層絶縁抵抗を監視しようとするｎ条のケーブル（金
属じゃへい）を示す。In the figure, AI, 2, 3, .
本発明の主要点は、成る定められた時限に自動的にこれ
らのケーブルの防食層絶縁抵抗を順次スキャンニングし
てチェックし定められた絶縁抵抗値を割るものがあれば
警報を発し不良ケーブルのナンバーを表示させようとす
るものであり、スキャニングが行われる短時間の間のみ
当該ケーブルの金属しゃへいの電位は大地から浮かされ
るがそれ以外の間は常時接地されているものである。The main point of the present invention is to automatically sequentially scan and check the corrosion protection layer insulation resistance of these cables at a predetermined period of time, and if there is any insulation resistance below the predetermined insulation resistance value, an alarm is issued to identify a defective cable. This is to display a number, and the potential of the metal shield of the cable is lifted from the ground only during a short period of time when scanning is performed, but the potential of the metal shield of the cable is kept grounded at all other times.
Ｔは成る定められた時限、例えば毎日午前１０時に１回
というふうに記憶していて、その時限に至れば自動的に
セレクタースイッチ駆動装置Ｍを起動させるタイマーで
ある。T is a timer that stores a predetermined time, for example, once every day at 10 a.m., and automatically starts the selector switch driving device M when the time reaches that time.
もちろんこの時限は任意に変更可能であり、場合によっ
ては手動で装置Ｍを起動させることも出来るものである
。Of course, this time limit can be changed arbitrarily, and depending on the situation, it is also possible to start the device M manually.
ＭはタイマーＴにより励振されて自動的にセレクタース
イッチＳ、Ｓの回動を行わせる駆動装置である。M is a drive device that is excited by a timer T and automatically rotates the selector switches S, S.
Ｓ、Ｓは駆動装置Ｍにより駆動されその都度１回回動す
るセレクタースイッチで、ポジションＯｉ、２，３・・
・・・・ｎ−ｉ、ｎとケーブル条数に見合う数のポジシ
ョンを有し、（イ）、（０）、Ｇ’→の三つの摺動アー
ムと、各ポジション毎に夫々（イ）。S, S are selector switches that are driven by the drive device M and rotate once each time, and have positions Oi, 2, 3, etc.
...has a number of positions corresponding to the number of cable threads (n-i, n), and has three sliding arms (A), (0), and G'→, and (A) for each position.
（ロ）、（ハ）に対応する３つの接点（い）（ろ）（は
）を持っている。It has three contacts (i), (ro), and (ha) corresponding to (b) and (c).
駆動装置Ｍが駆動を始めるとスイッチＳ、Ｓのポジショ
ンは最初の０の位置から１，２゜３・・・・・・ｎ−１
＋ｎの位置に移り、最後に再び０の位置に復帰してその
動きを停止する。When the drive device M starts driving, the positions of the switches S and S change from the initial 0 position to 1.2°3...n-1.
It moves to the +n position, and finally returns to the 0 position and stops its movement.
尚駆動装置ＭとセレクタースイッチＳ、Ｓの間係は上記
説明では機械的な結合により作動される如く説明したが
、これは電子的な結合で作動するようにしても良いこと
は勿論である。In the above description, the relationship between the drive device M and the selector switches S, S has been described as being operated by mechanical coupling, but it goes without saying that this may be operated by electronic coupling.
セレクタースイッチＳ、Ｓの（イ）、（ロ）のアーム間
にはリレーコイルＲＣ駆動用電源が接続されているので
スイッチＳ、Ｓのポジションが１の位置に来るとケーブ
ル１の端末近くに設置したリレーコイルＲＣ１が作動し
、今迄閉じていたｂ１接点が関いて代りにａ１接点が閉
じ、それまで大地に落ちていケーブル１の金属しゃへい
の電位は接点ａ１Ｓｌ。The relay coil RC drive power supply is connected between arms (A) and (B) of selector switches S and S, so when switches S and S are in position 1, they are installed near the end of cable 1. The relay coil RC1 is activated, and the b1 contact, which had been closed until now, is connected and the a1 contact is closed instead, and the potential of the metal shield of the cable 1, which had previously fallen to the ground, becomes contact a1Sl.
接点（は）を通じてスイッチＳ、Ｓのアーム（／→こも
たらされる。The arm (/→) of the switch S, S is brought through the contact ( ).
アーム（／−１と大地間には判定装置１が接続されてい
る。A determination device 1 is connected between the arm (/-1) and the ground.
判定装置１は内部に測定用電源を持っており、もしケー
ブル１の防食層に欽陥があればその程度に応じた電流が
大地を通じて流れ、その電流に反比例した値として絶縁
抵抗値を自動的に観測し得る。The determination device 1 has an internal power source for measurement, and if the corrosion protection layer of the cable 1 is damaged, a current corresponding to the degree of damage will flow through the ground, and the insulation resistance value will be automatically determined as a value inversely proportional to the current. can be observed.
判定装置１には警報告知装置Ａが接続されており、もし
予め定められた下限絶縁抵抗値を割った場合は判定装置
１より警報装置Ａ−に信号が送られ警報装置Ａから警報
が告知されるものである。An alarm notification device A is connected to the judgment device 1, and if the predetermined lower limit insulation resistance value is exceeded, a signal is sent from the judgment device 1 to the alarm device A-, and the alarm device A issues an alarm. It is something that
警報告知の方法として（まブザー或はターゲット落し等
により保守員の注意を喚起すると同時に不良ケーブルナ
ンバーを表示するものである。As a method of alarm notification, the faulty cable number is displayed at the same time as calling the attention of maintenance personnel by using a buzzer or dropping a target.
このため駆動装置Ｍと警報装置Ａとの間を電気的に連結
し、判定装置１の判定値と当該ケーブルナンバーとの対
応を行なわせる。For this purpose, the drive device M and the alarm device A are electrically connected, and the determination value of the determination device 1 is made to correspond to the cable number.
尚ケーブルにより下限抵抗値を換えて設定しておくこと
も自由である。It is also possible to set the lower limit resistance value differently depending on the cable.
次にセレクタースイッチＳ、Ｓのポジションが２に移る
とリレーコイルＲＣ１の駆動電流はオフになり接点ａ１
が開くと同時に接点ｂ１は閉じてケーブル１の金属じゃ
へいは大地に落され常態に復すると同時にケーブル２が
スキャンニングを受ける順番となり、リレーコイルＲＣ
２に、駆動電流が送られて今迄閉じられていた接点ｂ２
が開き接点ａ２は閉じてケーブル２の金属しゃへいの電
位が判定装置１に送られてその防食層絶縁抵抗値が下限
値以上であるかそれ以下であるかの判定を受け、その結
果により警報装置Ａが作動しなかったり、作動したりす
る。Next, when the selector switches S and S move to position 2, the drive current of relay coil RC1 is turned off and contact a1
At the same time as opens, contact b1 closes and the metal jacket of cable 1 is dropped to the ground and returns to normal state.At the same time, cable 2 is in turn to undergo scanning, and relay coil RC
2, the drive current is sent to contact b2, which has been closed until now.
is opened, contact a2 is closed, and the potential of the metal shield of the cable 2 is sent to the determination device 1, where it is determined whether the insulation resistance value of the corrosion protection layer is above or below the lower limit value, and based on the result, the alarm device is activated. A does not work or works.
以下同様の動作が続いてセレクタースイッチＳ、Ｓの一
巡ですべてのケーブルのスキャンニングが終ると警報装
置Ａでは、もしその時のスキャンニングで１条でも不良
ケーブルがあればブザー等により保守員の注意を引くべ
き信号が作動しているとともに、すべての不良ケーブル
ナンバーが表示されているものである。The same operation continues, and when the scanning of all cables is completed in one cycle of selector switches S and S, alarm device A will issue a buzzer etc. to warn maintenance personnel if even one defective cable is found during scanning. The signal to be pulled is working and all faulty cable numbers are displayed.
これらの信号及び表示は保守員のリセット操作により次
のスキャンニングに備える如く消去する。These signals and displays are erased by a reset operation by maintenance personnel in preparation for the next scanning.
ＣＩ ＋ Ｃ２”””Ｃｎｌ ｒ Ｃｎは静電容量で、
各ケーブルがスキャンニングを受けている間；金属しゃ
へい電位を交流的に低位に保つと同時に直流的には大地
から浮す作用を利用するものである。CI + C2”””Cnl r Cn is the capacitance,
While each cable is being scanned, the metal shielding potential is maintained at a low level in AC terms, and at the same time, the effect of floating from the ground in DC terms is utilized.
しかし−日中殆んど全部の時間は接点すにより静電容量
は短絡され、ケーブルの金属しゃへいの電位は大地に直
接落されているものである。However, during most of the day the capacitance is shorted by the contacts and the potential of the metal shield of the cable is dropped directly to earth.
以上の如く本発明によれば全く人手を及せず定時刻毎に
多数条ケーブルの防食層の絶縁抵抗のチェックが自動的
に行われ、もし異常がなければ警報装置は何等作動せず
、下限値以下の絶縁抵抗を観測した時のみ保守員の注意
をうながす信号発信と、不良ケーブルナンバーの表示を
行うことが出来る。As described above, according to the present invention, the insulation resistance of the anti-corrosion layer of the multi-strand cable is automatically checked at regular intervals without any manual intervention, and if there is no abnormality, the alarm device will not operate and the lower limit Only when the insulation resistance is observed to be less than the specified value, a signal can be sent to alert maintenance personnel and the defective cable number can be displayed.
従って保守員の監視業務の縮少に寄与することが出来る
と共に、全自動であるからスキャンニングの間隔をいく
らでも縮めることが出来るので監視精度が向上し不良ケ
ーブルをいち早く発見することが出来、ケーブルの金属
しゃへいは常時接地されていて、スキャンニングを受け
る極く短時間の間だけ自動的に開くのみであるので、萬
−ケーブル電気破壊事故があっても金属じゃへいは接地
されているから、その時保守員が本システムに手を触れ
ている可能性はゼロに等しく電気的に安全性大である等
の利点がある。Therefore, it can contribute to reducing the monitoring work of maintenance personnel, and since it is fully automatic, the scanning interval can be shortened as much as possible, improving monitoring accuracy and quickly discovering defective cables. Metal shields are always grounded and only open automatically during a very short period of time when they are scanned, so even if there is an electrical breakdown of a cable, the metal shield is grounded and will not open at that time. There are advantages such as the possibility that maintenance personnel touch this system is almost zero, and it is highly electrically safe.
第１図は本発明を実施した装置の説明図、第２図は従来
のものＳ説明図を示す。
ＡＩ、２，３・・・・・・ｎ−Ｌｎ・・・・・・ケーブ
ル、Ｔ・・・・・・タイマー Ｍ・・・・・・駆動装置
、Ｓ、Ｓ・・・・・セレクタースイッチ、ＲＣ・・・・
・・リレーコイル、ａ、ｂ・・・・・・接点、１・・・
・・・判定装置、Ａ・・・・・・警報装置。FIG. 1 is an explanatory diagram of a device embodying the present invention, and FIG. 2 is an explanatory diagram of a conventional device S. AI, 2,3...n-Ln...Cable, T...Timer M...Driver, S, S...Selector switch , RC...
...Relay coil, a, b...Contact, 1...
... Judgment device, A... Warning device.
Claims (1)
によりセレクタースイッチをその都度１回動させ、その
働きにより多数条のケーブル金属しゃへいの電位をリレ
ーコイルの動作により順次大地から浮かせて防食層絶縁
抵抗値を判定装置により観測させて予め定めた下限値と
比較させ、下限値以下のケーブルがあれば警報告知装置
により警報の発信と不良ケーブルナンバーの表示を行な
わせ、個々のケーブルの金属しゃへい電位はそのケーブ
ルがスキャンニングを受ける時のみ大地から浮かされる
がそれ以外の時は大地に落されることを特徴とする多数
条ケーブルの防食層絶縁抵抗自動監視装置。1 The selector switch is moved once each time by a timer that is activated at a set time and 1 a drive device, and by this action, the potential of the multiple cable metal shields is raised from the ground one by one by the operation of the relay coil, and the anticorrosion layer insulation resistance is increased. The value is observed by a judgment device and compared with a predetermined lower limit value, and if there is a cable below the lower limit value, an alarm is issued by the alarm alarm device and a defective cable number is displayed.The metal shielding potential of each cable is An automatic corrosion protection layer insulation resistance monitoring device for a multi-strand cable, characterized in that the cable is lifted off the ground only when it is subjected to scanning, but is dropped to the ground at other times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP47111847A JPS5841472B2 (en) | 1972-11-08 | 1972-11-08 | The actual cable is not available. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP47111847A JPS5841472B2 (en) | 1972-11-08 | 1972-11-08 | The actual cable is not available. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4968284A JPS4968284A (en) | 1974-07-02 |
| JPS5841472B2 true JPS5841472B2 (en) | 1983-09-12 |
Family
ID=14571645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP47111847A Expired JPS5841472B2 (en) | 1972-11-08 | 1972-11-08 | The actual cable is not available. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5841472B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5423987A (en) * | 1977-07-22 | 1979-02-22 | Showa Electric Wire & Cable Co | Method of monitoring abnormality in cable shielding layer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3399342A (en) * | 1965-06-29 | 1968-08-27 | Northern Electric Co | Automatic high voltage insulation cable test set for testing multiple conductor metal sheathed electrical cables |
-
1972
- 1972-11-08 JP JP47111847A patent/JPS5841472B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3399342A (en) * | 1965-06-29 | 1968-08-27 | Northern Electric Co | Automatic high voltage insulation cable test set for testing multiple conductor metal sheathed electrical cables |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4968284A (en) | 1974-07-02 |
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