JPS63187076U - - Google Patents
Info
- Publication number
- JPS63187076U JPS63187076U JP7735787U JP7735787U JPS63187076U JP S63187076 U JPS63187076 U JP S63187076U JP 7735787 U JP7735787 U JP 7735787U JP 7735787 U JP7735787 U JP 7735787U JP S63187076 U JPS63187076 U JP S63187076U
- Authority
- JP
- Japan
- Prior art keywords
- ground fault
- circuit
- detection
- current
- fault detection
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Description
第１図は本考案の一実施例の地絡箇所検出回路
を示す回路図、第２図、第３図は地絡電流と変流
器の二次側の誘起電圧との関係を示すグラフ、第
４図は他の実施例の地絡箇所検出回路を示す回路
図、第５図はさらに他の実施例の地絡箇所検出回
路を示す回路図、第６図はさらに他の実施例の地
絡箇所検出回路を示す回路図、第７図は従来の変
電設備における各種機器の制御回路を示す回路図
である。
１，６，７……検出接点、２……検出回路、３
……増幅回路、４……スイツチング回路、５……
表示部、８……地絡検知回路、ＺＣＴ……変流器
。
FIG. 1 is a circuit diagram showing a ground fault detection circuit according to an embodiment of the present invention, and FIGS. 2 and 3 are graphs showing the relationship between ground fault current and induced voltage on the secondary side of a current transformer. FIG. 4 is a circuit diagram showing a ground fault detection circuit according to another embodiment, FIG. 5 is a circuit diagram showing a ground fault detection circuit according to another embodiment, and FIG. 6 is a circuit diagram showing a ground fault detection circuit according to another embodiment. FIG. 7 is a circuit diagram showing a circuit for detecting a fault location, and FIG. 7 is a circuit diagram showing a control circuit for various devices in a conventional substation facility. 1, 6, 7...detection contact, 2...detection circuit, 3
...Amplification circuit, 4...Switching circuit, 5...
Display unit, 8...Ground fault detection circuit, ZCT...Current transformer.
Claims (1)
間に２つの地絡検出抵抗または地絡検出コンデン
サを介設して中間点を接地した地絡検知回路に地
絡電流を断続するための検出接点を介設すると共
に、各負荷回路には、当該負荷回路の地絡状態に
おいて前記検出接点の断続に伴う電流変化を拾う
変流器と、この変流器の二次側の誘導電圧を増幅
する増幅回路と、この増幅回路から出力される所
定電圧を感知して表示部に地絡表示信号を供給す
るスイツチング回路とを含む検出回路を接続した
ことを特徴とする直流回路における地絡箇所検出
回路。 P, N of a DC circuit with many loads connected in parallel
A detection contact for connecting and disconnecting the ground fault current is provided in the ground fault detection circuit which has two ground fault detection resistors or ground fault detection capacitors interposed between them and the intermediate point is grounded, and each load circuit has a detection contact for interrupting the ground fault current. A current transformer that picks up the current change due to the disconnection of the detection contact in the ground fault state of the load circuit, an amplifier circuit that amplifies the induced voltage on the secondary side of the current transformer, and a predetermined voltage output from the amplifier circuit. 1. A ground fault detection circuit in a DC circuit, characterized in that a detection circuit including a switching circuit that senses voltage and supplies a ground fault display signal to a display section is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7735787U JPH0623970Y2 (en) | 1987-05-25 | 1987-05-25 | Ground fault detection circuit in DC circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7735787U JPH0623970Y2 (en) | 1987-05-25 | 1987-05-25 | Ground fault detection circuit in DC circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63187076U true JPS63187076U (en) | 1988-11-30 |
| JPH0623970Y2 JPH0623970Y2 (en) | 1994-06-22 |
Family
ID=30925285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7735787U Expired - Lifetime JPH0623970Y2 (en) | 1987-05-25 | 1987-05-25 | Ground fault detection circuit in DC circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0623970Y2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011223801A (en) * | 2010-04-13 | 2011-11-04 | Chugoku Electric Power Co Inc:The | Dc grounding position searching method, grounding current supply device and dc ground monitoring system |
| JP2011227019A (en) * | 2010-04-23 | 2011-11-10 | Chugoku Electric Power Co Inc:The | Dc circuit ground fault search device and dc circuit ground fault accident spot search method |
| JP2013145157A (en) * | 2012-01-13 | 2013-07-25 | Chugoku Electric Power Co Inc:The | Dc earth fault detecting device and dc earth fault detecting method |
| JP2013210246A (en) * | 2012-03-30 | 2013-10-10 | Chugoku Electric Power Co Inc:The | Resistance value calculation device |
-
1987
- 1987-05-25 JP JP7735787U patent/JPH0623970Y2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011223801A (en) * | 2010-04-13 | 2011-11-04 | Chugoku Electric Power Co Inc:The | Dc grounding position searching method, grounding current supply device and dc ground monitoring system |
| JP2011227019A (en) * | 2010-04-23 | 2011-11-10 | Chugoku Electric Power Co Inc:The | Dc circuit ground fault search device and dc circuit ground fault accident spot search method |
| JP2013145157A (en) * | 2012-01-13 | 2013-07-25 | Chugoku Electric Power Co Inc:The | Dc earth fault detecting device and dc earth fault detecting method |
| JP2013210246A (en) * | 2012-03-30 | 2013-10-10 | Chugoku Electric Power Co Inc:The | Resistance value calculation device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0623970Y2 (en) | 1994-06-22 |
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