JPH0493669A - Short circuit detector - Google Patents
Short circuit detectorInfo
- Publication number
- JPH0493669A JPH0493669A JP2207168A JP20716890A JPH0493669A JP H0493669 A JPH0493669 A JP H0493669A JP 2207168 A JP2207168 A JP 2207168A JP 20716890 A JP20716890 A JP 20716890A JP H0493669 A JPH0493669 A JP H0493669A
- Authority
- JP
- Japan
- Prior art keywords
- current
- earth leakage
- branch
- detection device
- accident
- 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
- 238000004804 winding Methods 0.000 claims abstract description 20
- 238000001514 detection method Methods 0.000 claims description 33
- 230000004907 flux Effects 0.000 abstract description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 6
- 238000013411 master cell bank Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
Description
【発明の詳細な説明】
［概要］
分岐回路を有する配電盤の中で漏電事故か発生した分岐
回路を探し出す漏電検出装置に関し、小型で低コストと
し増設された分岐回路にも容易に追加設置することがで
き、さらに速やかにかつ確実に漏電事故か発生した分岐
配線を探し出すことかできることを目的とし、
磁性管に巻き線を巻回し、その巻き線の両端部間にヒユ
ーズを接続した。[Detailed Description of the Invention] [Summary] To provide an earth leakage detection device that locates a branch circuit in which an earth leakage accident has occurred in a switchboard having branch circuits, which is small and low cost, and can be easily additionally installed in an expanded branch circuit. In order to be able to quickly and reliably locate the branch wiring where an electrical leakage accident has occurred, a wire was wound around a magnetic tube and a fuse was connected between both ends of the winding.
［産業上の利用分野コ
本発明は主幹線に接続された分岐回路の漏電事故を検出
する漏電検出装置に係り、詳しくは多（の分岐回路を有
する配電盤の中で漏電事故が発生した分岐回路を探し出
す漏電検出装置に関するものである。[Industrial Field of Application] The present invention relates to an earth leakage detection device for detecting an earth leakage accident in a branch circuit connected to a main line, and more specifically, for detecting an earth leakage accident in a branch circuit having a large number of branch circuits. The present invention relates to an earth leakage detection device that detects earth leakage.
近年、工場のＦＡ化及び事務所のＯＡ化等の発達により
配電盤の主幹線に対し多（の分岐回路を接続して電力を
供給する配電盤が多く設けられている。そのため、多く
の分岐回路の端末に接続される機器等に漏電事故が発生
したとき、この事故が発生した分岐回路を速やかに確実
に捜し出すことが必要となっている。In recent years, with the development of FA in factories and OA in offices, many switchboards have been installed to supply power by connecting multiple branch circuits to the main line of the switchboard. When an electrical leakage accident occurs in equipment connected to a terminal, it is necessary to quickly and reliably locate the branch circuit where the accident occurred.
［従来の技術］
従来、漏電電流を検出して漏電事故を検出する漏電事故
検出装置におては、零相変流器（ＺＣＴ）とを組み合わ
せた漏電リレー（ＥＬＲ）等が採用されている。[Conventional technology] Conventionally, earth leakage detection devices that detect earth leakage accidents by detecting earth leakage currents employ earth leakage relays (ELRs), etc., which are combined with zero-phase current transformers (ZCTs). .
そのため、配電盤の主幹線に接続される複数の分岐回路
毎に上記の漏電事故検出装置を設け、各分岐回路に発生
する漏電事故を速やかに確実に探し出すことが可能であ
る。Therefore, by providing the above-mentioned earth leakage accident detection device for each of a plurality of branch circuits connected to the main line of the switchboard, it is possible to promptly and reliably find earth leakage accidents that occur in each branch circuit.
［発明が解決しようとする課題］
しかしながら、前記漏電事故検出装置は高価であって装
置そのものが大きいため、前記配電盤の幹線に接続され
る分岐回路毎に漏電事故検出装置を設けると、漏電事故
検出装置を設置する多くのスペースを確保しなければな
らない。さらに、各分岐回路毎に漏電事故検出装置を設
けることはコスト的にも高価なものとなってしまう。[Problems to be Solved by the Invention] However, the earth leakage accident detection device is expensive and the device itself is large, so if an earth leakage accident detection device is provided for each branch circuit connected to the main line of the switchboard, it is difficult to detect an earth leakage accident. A large amount of space must be reserved for installing the equipment. Furthermore, providing an earth leakage accident detection device for each branch circuit would be expensive in terms of cost.
又、配電盤の主幹線に接続される既設の分岐回路毎に漏
電事故検出装置を設けたとしても、その後さらに主幹線
に分岐回路を増設した場合、増設分の分岐回路に漏電事
故検出装置を設けることは漏電事故検出装置の設置スペ
ースの点から困難である。In addition, even if an earth leakage detection device is provided for each existing branch circuit connected to the main line of the switchboard, if a branch circuit is subsequently added to the main line, an earth leakage detection device must be installed on the additional branch circuit. This is difficult in terms of installation space for the earth leakage detection device.
本発明は上記問題点を解決するためになされたものであ
って、その目的は小型で低コストとし増設された分岐回
路にも容易に追加設置することかでき、さらに速やかに
かつ確実に漏電事故か発生した分岐配線を探し出すこと
ができる漏電検圧装置を提供することにある。The present invention has been made in order to solve the above problems, and its purpose is to be small and low-cost, to be able to be easily added to added branch circuits, and to quickly and reliably prevent electric leakage from occurring. An object of the present invention is to provide an earth leakage pressure detection device capable of finding a branch wiring that has occurred.
［課題を解決するための手段］
第１図は本発明の漏電検出装置を説明するための原理図
である。[Means for Solving the Problems] FIG. 1 is a principle diagram for explaining the earth leakage detection device of the present invention.
漏電検出装置３は磁性管４に巻き線５を巻回し、その巻
き線５の両端部間にヒユーズ６を接続して構成した。The earth leakage detection device 3 is constructed by winding a winding 5 around a magnetic tube 4 and connecting a fuse 6 between both ends of the winding 5.
［作用］
上記の構成により、磁性管４の軸心方向に電流が流れる
と、この電流により磁性管４に磁束か発生し、この磁束
は磁性管４に巻回された巻き線５と鎖交する。そのため
、巻き線５に誘導電流か発生し、この誘導電流により巻
き線５の両端に接続されたヒユーズ６が溶断する。[Function] With the above configuration, when a current flows in the axial direction of the magnetic tube 4, a magnetic flux is generated in the magnetic tube 4 by this current, and this magnetic flux interlinks with the winding 5 wound around the magnetic tube 4. do. Therefore, an induced current is generated in the winding 5, and the fuse 6 connected to both ends of the winding 5 is blown by this induced current.
［実施例］
以下、本発明を具体化した漏電検出装置の一実施例を第
２，３図に従って説明する。[Example] Hereinafter, an example of an earth leakage detection device embodying the present invention will be described with reference to FIGS. 2 and 3.
第２図に示すように、配電盤ｌには３相の主幹線２が引
き込まれ、この主幹線２にはメインＭＣＢが設けられて
いる。又、主幹線２において前記メインＭＣＢか設けら
れた負荷側には零相変流器ＺＣＴか取着されている。さ
らに、前記零相変流器ＺＣＴには漏電リレーＥ Ｌ Ｒ
が接続されている。As shown in FIG. 2, a three-phase main line 2 is drawn into the distribution board l, and this main line 2 is provided with a main MCB. Further, a zero-phase current transformer ZCT is attached to the load side of the main line 2 where the main MCB is provided. Furthermore, the zero-phase current transformer ZCT includes an earth leakage relay E L R
is connected.
従って、前記零相変流器ＺＣＴの検出漏電電流に基づい
て漏電リレーＥＬＲが動作し、この動作により配電盤１
に漏電事故が発生したことを図示しない監視室の管理者
に知らせるようになっている。前記配電盤１は各場所に
複数設けられており、監視室によって各配電盤１を集中
監視するようになっている。Therefore, the earth leakage relay ELR operates based on the earth leakage current detected by the zero-phase current transformer ZCT, and this operation causes the switchboard 1
The administrator of a monitoring room (not shown) is notified of the occurrence of an electrical leakage accident. A plurality of the switchboards 1 are provided at each location, and each switchboard 1 is centrally monitored by a monitoring room.
前記メインＭＣＢにより保護された主幹線２には分岐Ｍ
ＣＢを介して分岐配線としての分岐線ＳＩ Ｓ２・・
・・・・５ｎ（ｎは整数）か複数接続されている。又、
この各分岐線５ＩＳ２・・・・・・Ｓｎには負荷が接続
されている。そして、前記分岐ＮＩＣＢと負荷との間に
おける各分岐線３１．Ｓ２・・・・・・Ｓｎには漏電検
圧装置３がそれぞれ装着されている。The main line 2 protected by the main MCB has a branch M
Branch line SI S2 as branch wiring via CB
... 5n (n is an integer) or more than one are connected. or,
A load is connected to each branch line 5IS2...Sn. Each branch line 31. between the branch NICB and the load. An earth leakage pressure detection device 3 is attached to each of S2...Sn.
次に、前記漏電検出装置３の構成について説明する。Next, the configuration of the earth leakage detection device 3 will be explained.
第２図に示すように、前記漏電検出装置３は磁性体によ
り形成された円筒形状の磁性管４と、同磁性管４に巻回
される巻き線としての巻き線５と、同巻き線５の両端に
接続されたヒユーズ６とから構成されている。As shown in FIG. 2, the earth leakage detection device 3 includes a cylindrical magnetic tube 4 made of a magnetic material, a winding 5 as a winding wound around the magnetic tube 4, and a winding 5 as a winding wire wound around the magnetic tube 4. The fuse 6 is connected to both ends of the fuse 6.
前記各分岐線Ｓは第３図に示すように２本のリード線８
ａ、８ｂとから構成され、リート線８ａの一端には接続
端子７ａか、リート線８ｂの一端には接続端子７ｂが圧
着接続されている。そして、この接続端子７ａ、７ｂは
前記３相の主幹線２のうち２相に接続された分岐ＭＣＢ
に接続されている。Each branch line S has two lead wires 8 as shown in FIG.
A and 8b, and a connection terminal 7a is connected to one end of the wire 8a, and a connection terminal 7b is crimped to one end of the wire 8b. The connection terminals 7a and 7b are connected to branch MCBs connected to two phases of the three-phase main line 2.
It is connected to the.
上記のように構成された漏電検出装置３の作用について
説明する。The operation of the earth leakage detection device 3 configured as described above will be explained.
通常、各分岐線ＳＬ、Ｓ２・・・・・・Ｓｎに接続され
る負荷には主幹線２からメインＭＣＢ、分岐ＭＣＢを介
して電力が供給される。そのため、電流Ｉは主幹線２、
分岐ＭＣＢ、接続端子７ａを介してリート線８ａを流れ
、負荷側を通過してリード線８ｂに流れる。そして、こ
の電流Ｉは接続端子７ｂ１分岐ＭＣＢを介して主幹線２
に戻る。Normally, power is supplied from the main line 2 to the loads connected to the branch lines SL, S2, . . . , Sn via the main MCB and the branch MCB. Therefore, the current I is the main line 2,
It flows through the lead wire 8a via the branch MCB and the connection terminal 7a, passes through the load side, and flows into the lead wire 8b. Then, this current I is passed through the main line 2 through the connection terminal 7b1 branch MCB.
Return to
このため、第３図に示すように、分岐線Ｓに流れる電流
Ｉは往復電流となるため、互いの電流Ｉにより発生する
磁束は互いに打ち消される。従って、分岐線Ｓに挿通さ
れた漏電検出装置３の磁性管４には磁束が発生しない。Therefore, as shown in FIG. 3, the current I flowing through the branch line S becomes a reciprocating current, so that the magnetic fluxes generated by the currents I cancel each other out. Therefore, no magnetic flux is generated in the magnetic tube 4 of the earth leakage detection device 3 inserted into the branch line S.
この結果、巻き線５には誘導電流が発生しないため、ヒ
ユーズ６は溶断することはない。As a result, no induced current is generated in the winding 5, so the fuse 6 will not blow out.
又、各分岐線８１．Ｓ２・・・・・・Ｓｎが正常であれ
ば主幹線２における各相の合成電流ベクトルは零となる
ため、主幹線２に取着された零相変流器ＺＣＴは漏電リ
レーＥＬＲへ信号を出力しない。よって、漏電リレーＥ
ＬＲは動作せず、図示しない監視室の管理者は正常であ
ることを認識する。Moreover, each branch line 81. S2...If Sn is normal, the combined current vector of each phase in the main line 2 will be zero, so the zero-phase current transformer ZCT attached to the main line 2 will send a signal to the earth leakage relay ELR. No output. Therefore, earth leakage relay E
The LR does not operate, and the administrator of the monitoring room (not shown) recognizes that it is normal.
ここで、分岐線Ｓに接続された負荷に漏電事故が発生す
ると、第２図にしめすように漏電事故箇所に向かって事
故電流（漏電電流）Ｉｇが主幹線２、分岐ＭＣＢ、接続
端子７ａ（又は７ｂ）及びリード線８ａ（又は８ｂ）を
介して流れ込んでくる。Here, when an earth leakage accident occurs in the load connected to the branch line S, the fault current (earth leakage current) Ig flows toward the earth leakage accident location as shown in Figure 2. or 7b) and the lead wire 8a (or 8b).
そのため、リード線８ａ（又は８ｂ）に流れる事故電流
Ｉｇは一方向となるので、この事故電流Ｉｇにより磁性
管４に磁束が発生する。すると、この磁束が磁性管４に
巻回された巻き線５に誘導電流Ｉｏを発生させる。Therefore, since the fault current Ig flowing through the lead wire 8a (or 8b) is unidirectional, magnetic flux is generated in the magnetic tube 4 due to the fault current Ig. Then, this magnetic flux generates an induced current Io in the winding 5 wound around the magnetic tube 4.
この誘導電流■０により巻き線５の両端に接続されたヒ
ユーズ６が溶断し、漏電事故による事故電流Ｉｇが流れ
たことを表示する。This induced current (2) causes the fuse 6 connected to both ends of the winding 5 to melt, indicating that a fault current Ig due to an earth leakage fault has flowed.
一方、漏電事故により主幹線２にも事故電流工ｇが流れ
るため、各相の合成電流ベクトルが零とはならす、３相
の主幹線２に取着された零相変流器ＺＣＴはこの事故電
流１ｇにより誘導電流■○が発生する７、この誘導電流
■○は漏電リレーＥＬＲに出力され、漏電リレーＥＬＲ
はこの誘導電流Ｉｏに基ついて動作し、漏電事故か発生
したことを監視室の管理者に知らせる。On the other hand, because the fault current g flows in the main line 2 due to the earth leakage fault, the composite current vector of each phase is not zero.The zero-phase current transformer ZCT attached to the three-phase main line 2 An induced current ■○ is generated by 1 g of current 7. This induced current ■○ is output to the earth leakage relay ELR,
operates based on this induced current Io and notifies the supervisor of the monitoring room that a leakage accident has occurred.
又、−時的に瞬時に発生した漏電事故は漏電リレーＥＬ
Ｒでは継続した事故の検出ができないので事故分岐線の
特定ができない。この漏電検出装置３のヒユーズ６の溶
断を探しださせば当該分岐線Ｓにおいて一時的な漏電が
生じたことを簡単に発見することができる。In addition, - In case of an electric leakage accident that occurs instantaneously, the earth leakage relay EL
Since R cannot detect continuous accidents, it is not possible to identify the accident branch line. If the fuse 6 of the earth leakage detection device 3 is found to be blown, it can be easily discovered that a temporary earth leak has occurred in the branch line S.
この結果、漏電リレーＥＬＲの動作により管理者は複数
あるなかのどの配電盤１に漏電事故が発生したかを監視
室にて確認し、その配電盤１か設置されている場所に行
ってヒユーズ６か溶断している漏電検出装置３を見つけ
だせば容易に漏電事故が発生した分岐線Ｓを特定するこ
とができる。As a result, due to the operation of the earth leakage relay ELR, the administrator can check in the monitoring room which of the multiple switchboards 1 has experienced a leakage accident, go to the location where the switchboard 1 is installed, and blow the fuse 6. If the earth leakage detection device 3 is found, it is possible to easily identify the branch line S where the earth leakage accident has occurred.
そして、この分岐線Ｓ及びこれに接続された負荷の検査
を行い漏電事故の原因を除去をし、再度漏電事故か発生
しないようにすることかできる。Then, the branch line S and the load connected thereto are inspected to eliminate the cause of the earth leakage accident, thereby making it possible to prevent the earth leakage accident from occurring again.
この結果、漏電事故発生により各種の測定器を使用しな
くても分岐線Ｓに装着された漏電検出装置３のヒユーズ
６の溶断を見るたけで速やかにかつ、確実に漏電事故か
発生した分岐線Ｓを探し出すことができ、労力の無駄か
防止できる。As a result, it is possible to quickly and reliably detect the occurrence of an earth leakage accident by simply observing the fuse 6 of the earth leakage detection device 3 attached to the branch line S without using various measuring instruments. S can be found, and wasted effort can be prevented.
又、漏電検出装置３は磁性管４、巻き線５及びヒユーズ
６による簡単な構成により、小型化することかできると
ともに、コストを安くすることかできる。さらに、主幹
線２に分岐線Ｓを増設しても増設した分岐線Ｓに漏電検
出装置３を容易に設置することができる。Moreover, the earth leakage detection device 3 has a simple structure consisting of the magnetic tube 4, the winding 5, and the fuse 6, so that it can be made smaller and the cost can be reduced. Furthermore, even if a branch line S is added to the main line 2, the earth leakage detection device 3 can be easily installed on the added branch line S.
［発明の効果］
以上詳述したように、本発明は小型化、低コストを図る
ことかできるとともに、増設した分岐配線にも容易に追
加設置することかでき、さらにはヒユーズの溶断の有無
により漏電事故の発生した分岐配線を速やかに確実に特
定できる優れた効果を有する。[Effects of the Invention] As described in detail above, the present invention can achieve miniaturization and low cost, can be easily added to additional branch wiring, and can also be easily installed depending on whether fuses are blown or not. This has the excellent effect of quickly and reliably identifying the branch wiring where an earth leakage accident has occurred.
第１図は本発明に係る漏電検出装置の原理図、第２図は
配電盤の各分岐線に漏電検出装置を設置した構成図、
第３図は漏電検出装置に挿通ずる分岐線の構成図である
。
図において、
１よ配電盤、
２は主幹線、
３は漏電検出装置、
４よ磁性管、
５は巻き線、
６まヒユーズ
Ｓｔ分岐配線としての分岐線である。
第１図
本発明ＵＬ係る漏電検出装置の原理図
第３図Fig. 1 is a principle diagram of the earth leakage detection device according to the present invention, Fig. 2 is a configuration diagram of the earth leakage detection device installed in each branch line of the switchboard, and Figure 3 is a configuration diagram of the branch line inserted into the earth leakage detection device. be. In the figure, 1 is a switchboard, 2 is a main line, 3 is an earth leakage detection device, 4 is a magnetic tube, 5 is a winding, and 6 is a branch line as a fuse St branch wiring. Fig. 1 Principle diagram of the earth leakage detection device according to the UL of the present invention Fig. 3
Claims (1)
（５）の両端部間にヒューズ（６）を接続したことを特
徴とする漏電検出装置。 ２、配電盤において主幹線に対して多数分岐された各分
岐配線に対して磁性管（４）を挿通するとともに、その
各磁性管（４）に巻き線（５）を巻回し、その巻き線（
５）の両端部間にヒューズ（６）を接続したことを特徴
とする漏電検出装置。[Claims] 1. An earth leakage detection device characterized in that a winding (5) is wound around a magnetic tube (4), and a fuse (6) is connected between both ends of the winding (5). 2. At the switchboard, insert the magnetic tube (4) into each of the many branch wirings that branch out from the main line, and wind the winding wire (5) around each magnetic tube (4).
5) A leakage detection device characterized in that a fuse (6) is connected between both ends of the earth leakage detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2207168A JPH0493669A (en) | 1990-08-03 | 1990-08-03 | Short circuit detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2207168A JPH0493669A (en) | 1990-08-03 | 1990-08-03 | Short circuit detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0493669A true JPH0493669A (en) | 1992-03-26 |
Family
ID=16535358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2207168A Pending JPH0493669A (en) | 1990-08-03 | 1990-08-03 | Short circuit detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0493669A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007263663A (en) * | 2006-03-28 | 2007-10-11 | Chugoku Electric Power Co Inc:The | Electric leakage detector |
| JP2010197172A (en) * | 2009-02-24 | 2010-09-09 | Toshiba Mitsubishi-Electric Industrial System Corp | Current detector |
-
1990
- 1990-08-03 JP JP2207168A patent/JPH0493669A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007263663A (en) * | 2006-03-28 | 2007-10-11 | Chugoku Electric Power Co Inc:The | Electric leakage detector |
| JP2010197172A (en) * | 2009-02-24 | 2010-09-09 | Toshiba Mitsubishi-Electric Industrial System Corp | Current detector |
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