JPS6270630U - - Google Patents
Info
- Publication number
- JPS6270630U JPS6270630U JP16345085U JP16345085U JPS6270630U JP S6270630 U JPS6270630 U JP S6270630U JP 16345085 U JP16345085 U JP 16345085U JP 16345085 U JP16345085 U JP 16345085U JP S6270630 U JPS6270630 U JP S6270630U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- zero
- output signal
- reverse
- predetermined time
- 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 3
- 230000001105 regulatory effect Effects 0.000 claims 2
- 230000001934 delay Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案に係る地絡方向継電器の回路構
成の一実施例を示すブロツク図、第２図は地絡保
護を説明するための配電系統の一例を示す説明図
、第３図は地絡方向継電器の回路構成の従来例を
示すブロツク図である。
１８……位相比較回路、２１……逆方向電流レ
ベル検出回路、２２……遅延回路、２３……保持
回路、２４……出力回路、Ｖｏ……零相電圧、Ｉ
ｏ……零相電流。
Fig. 1 is a block diagram showing an example of the circuit configuration of a ground fault directional relay according to the present invention, Fig. 2 is an explanatory diagram showing an example of a power distribution system to explain ground fault protection, and Fig. 3 is a block diagram showing an example of the circuit configuration of a ground fault directional relay according to the present invention. 1 is a block diagram showing a conventional example of a circuit configuration of a short-circuit relay. 18... Phase comparison circuit, 21... Reverse current level detection circuit, 22... Delay circuit, 23... Holding circuit, 24... Output circuit, Vo... Zero-phase voltage, I
o...Zero-sequence current.
Claims (1)
形整形された零相電圧を位相比較し、地絡故障に
より流れる零相電流の正逆方向を判別する位相比
較回路と、 該位相比較回路にて逆方向の零相電流が判別さ
れると、その出力信号を設定レベル以上か否かを
検出する逆方向電流レベル検出回路と、 該逆方向電流レベル検出回路の出力信号を所定
の時間遅延させる遅延回路と、 該遅延回路の出力信号を所定の時間だけホール
ドする保持回路と、 該保持回路にてホールドされる所定の時間が経
過するまで出力信号を送出しない出力回路とを含
むことを特徴とする地絡方向継電器。[Claims for Utility Model Registration] A phase comparison for comparing the phases of a current-regulated zero-sequence current and a voltage-regulated and waveform-shaped zero-sequence voltage to determine whether the zero-sequence current flows in the forward or reverse direction due to a ground fault. a reverse current level detection circuit that detects whether the output signal is equal to or higher than a set level when the phase comparison circuit determines a reverse zero-sequence current; and the reverse current level detection circuit. A delay circuit that delays an output signal for a predetermined time; a holding circuit that holds the output signal of the delay circuit for a predetermined time; and an output that does not send out an output signal until the predetermined time held by the holding circuit has elapsed. A ground fault directional relay comprising a circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985163450U JPH0510517Y2 (en) | 1985-10-24 | 1985-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985163450U JPH0510517Y2 (en) | 1985-10-24 | 1985-10-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6270630U true JPS6270630U (en) | 1987-05-06 |
| JPH0510517Y2 JPH0510517Y2 (en) | 1993-03-15 |
Family
ID=31091660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985163450U Expired - Lifetime JPH0510517Y2 (en) | 1985-10-24 | 1985-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0510517Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6055824A (en) * | 1983-09-06 | 1985-04-01 | 東京電力株式会社 | Ground-fault protecting system of high voltage distributing system |
-
1985
- 1985-10-24 JP JP1985163450U patent/JPH0510517Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6055824A (en) * | 1983-09-06 | 1985-04-01 | 東京電力株式会社 | Ground-fault protecting system of high voltage distributing system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0510517Y2 (en) | 1993-03-15 |
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