JPS59208474A - Earth point detection for dc circuit - Google Patents
Earth point detection for dc circuitInfo
- Publication number
- JPS59208474A JPS59208474A JP8373183A JP8373183A JPS59208474A JP S59208474 A JPS59208474 A JP S59208474A JP 8373183 A JP8373183 A JP 8373183A JP 8373183 A JP8373183 A JP 8373183A JP S59208474 A JPS59208474 A JP S59208474A
- Authority
- JP
- Japan
- Prior art keywords
- current
- earth
- power source
- circuit
- detected
- 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
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Locating Faults (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、接地を発生した直流電源ラインに２ケの抵抗
器を直列に接続し、その中点を断続的に接地することに
より、検出しようとする接地点に断続的な接地電流を流
し、この電流の誘導作用によって発生するパルス電流を
検出することにより、直流電流計では選択的に計測する
ことのできない微少接地電流を、回路を切り開くことな
しに検出することを可能にした直流回路接地点検出方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention connects two resistors in series to the DC power supply line that generates the ground, and intermittently connects the midpoint of the resistors to the ground. By passing a ground current and detecting the pulse current generated by the induction effect of this current, it is possible to detect minute ground currents that cannot be selectively measured with a DC ammeter without cutting the circuit. This invention relates to a DC circuit grounding point detection method that makes it possible.
この方法は従来からある方式のように、交流電源を重畳
したり直流接地電流を交流に変換したりしないので、負
荷回路への接地電流の分流に起因する負荷の誤動作、焼
損の恐れがなく、安全に、かつ簡単に接地故障点の検出
を可能にしたものである。Unlike conventional methods, this method does not superimpose AC power or convert DC ground current to AC, so there is no risk of load malfunction or burnout due to ground current being shunted to the load circuit. This makes it possible to safely and easily detect the ground fault point.
図−１、図−２により本発明を説明する。The present invention will be explained with reference to FIGS. 1 and 2.
図−１に示すように、接地電流断続器１４は抵抗器ｌ及
び２と断続リレー８とで構成され、抵抗器を２つ使うの
は接地故障点が直流回路（電源）のＰ側、Ｎ側どちらで
も、同じように装置を使えるようにするためである。又
、接地電流検出器１６は分割鉄心１０とこれに鎖交する
コイルに接がれた電流計１５とで構成される。As shown in Figure 1, the ground current interrupter 14 is composed of resistors l and 2 and an intermittent relay 8. Two resistors are used because the ground fault point is on the P side of the DC circuit (power supply) and the N side of the DC circuit (power supply). This is so that the device can be used in the same way on either side. The ground current detector 16 is composed of a split core 10 and an ammeter 15 connected to a coil interlinked with the split core 10.
接地が発生した直流電源回路に接地電流断続器１４を接
続（端子５．６）Ｉ、、端子７を接地する。次に断続リ
レー８の′Ｒｆ、源を端子８．９に接続すると接点４が
オンオフを開始し、接ｊｆ［流が破線の経路を通って図
−２−２のように流れる。Connect the grounding current interrupter 14 to the DC power supply circuit where the grounding occurred (terminals 5, 6) I, and ground the terminal 7. Next, when the 'Rf source of the intermittent relay 8 is connected to the terminal 8.9, the contact 4 starts to turn on and off, and the contact jf flows through the broken line path as shown in Figure 2-2.
一万接地を生じている負荷１１の負荷電流は図−艮−１
であるから、回路電流としては図−２−２の断続接地電
流が重畳され図−２−３のようになる。この電流を接地
電流検出器１６で測定すると、断続接地電流の立上り、
立下り時に電磁誘導作用により図−２−４のような電流
が計測され、本来の負荷電流は血流のため検出されずに
負荷電流を重畳された接地電流のみが選択的に検出され
るので、負荷１１．１２等の回路か順次接地電流検出器
を挿入することにより接地電流の流れている回路（接地
故障の発生している回路）を容易に検出することができ
る。The load current of load 11, which is grounded 10,000 times, is shown in Figure-1-1.
Therefore, the circuit current is superimposed with the intermittent grounding current shown in FIG. 2-2 and becomes as shown in FIG. 2-3. When this current is measured by the grounding current detector 16, the rise of the intermittent grounding current,
At the time of falling, a current as shown in Figure 2-4 is measured due to electromagnetic induction, and the original load current is not detected due to blood flow, and only the ground current superimposed with the load current is selectively detected. By sequentially inserting a ground current detector into circuits such as loads 11, 12, etc., a circuit in which a ground current is flowing (a circuit in which a ground fault has occurred) can be easily detected.
このようにして本発明方法によれば、異種電源回路の混
触点検出等に利用することができる。In this manner, the method of the present invention can be used to detect contact points between different types of power supply circuits.
図−１は本発明の直流回路接地点検出方法の構成を示す
ものである。
１．２ 抵抗器
８ 断続リレー
□：、４ 断続リレー接点
５．６．７．８．９ 端子
１０ 分割鉄心
１１．１２ ’ 負荷
１３ 直流電源
１４ 接地電流断続器
１５ 電流計
１６ 接地電流検出器
図−２は図−１の方法における回路の電流波形を示すも
のである。
１ 負荷電流波形
２ 接地電流波形
３ 回路電流波形
４ 誘導電流波形FIG. 1 shows the configuration of the DC circuit grounding point detection method of the present invention. 1.2 Resistor 8 Intermittent relay □:, 4 Intermittent relay contact 5.6.7.8.9 Terminal 10 Split core 11.12' Load 13 DC power supply 14 Earthing current interrupter 15 Ammeter 16 Earthing current detector diagram -2 shows the current waveform of the circuit in the method of FIG. 1 Load current waveform 2 Ground current waveform 3 Circuit current waveform 4 Induced current waveform
Claims (1)
点を断続的に接地することによって、検出しようとする
接地点に断続的な接地電流を流し、この接地電流の誘導
作用により周囲の磁気的閉回路と鎖交するコイルに発生
するパルス電流を検出することによって接地点を検出す
る方法。By connecting two resistors in series to the DC power supply line and intermittently grounding their midpoints, an intermittent grounding current flows through the grounding point to be detected, and the inductive action of this grounding current causes the surrounding A method of detecting the ground point by detecting the pulse current generated in the coil that interlinks with the magnetic closed circuit of the
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8373183A JPS59208474A (en) | 1983-05-12 | 1983-05-12 | Earth point detection for dc circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8373183A JPS59208474A (en) | 1983-05-12 | 1983-05-12 | Earth point detection for dc circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59208474A true JPS59208474A (en) | 1984-11-26 |
Family
ID=13810663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8373183A Pending JPS59208474A (en) | 1983-05-12 | 1983-05-12 | Earth point detection for dc circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59208474A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4739275A (en) * | 1985-09-06 | 1988-04-19 | Southern California Edison | DC ground fault detection |
| US4837519A (en) * | 1985-09-06 | 1989-06-06 | Southern California Edison Company | Fault detection |
| JPH0217468A (en) * | 1988-07-06 | 1990-01-22 | Tsuken Denki Kogyo Kk | Device for detecting ground fault point of distribution line |
| US4929901A (en) * | 1985-09-06 | 1990-05-29 | Dorr Kimball | DC ground fault detection |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5652754U (en) * | 1979-09-28 | 1981-05-09 |
-
1983
- 1983-05-12 JP JP8373183A patent/JPS59208474A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5652754U (en) * | 1979-09-28 | 1981-05-09 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4739275A (en) * | 1985-09-06 | 1988-04-19 | Southern California Edison | DC ground fault detection |
| US4837519A (en) * | 1985-09-06 | 1989-06-06 | Southern California Edison Company | Fault detection |
| US4929901A (en) * | 1985-09-06 | 1990-05-29 | Dorr Kimball | DC ground fault detection |
| JPH0217468A (en) * | 1988-07-06 | 1990-01-22 | Tsuken Denki Kogyo Kk | Device for detecting ground fault point of distribution line |
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