JPH02128967U - - Google Patents
Info
- Publication number
- JPH02128967U JPH02128967U JP3697689U JP3697689U JPH02128967U JP H02128967 U JPH02128967 U JP H02128967U JP 3697689 U JP3697689 U JP 3697689U JP 3697689 U JP3697689 U JP 3697689U JP H02128967 U JPH02128967 U JP H02128967U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- fault current
- rehabilitation
- detection device
- measurement signal
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
第１図は本考案の故障電流検出装置の回路図、
第２図は第１図の回路の通常時の出力波形図、第
３図は小電流時の出力波形図、第４図は本考案の
故障電流検出装置の変形回路例を示す図である。
図中、１は架空地線、２は変流器、３，１１〜
１４は抵抗、４，５はツエナーダイオード、６は
ＬＥＤ、７〜１０はダイオードを示す。
Figure 1 is a circuit diagram of the fault current detection device of the present invention.
2 is a normal output waveform diagram of the circuit of FIG. 1, FIG. 3 is an output waveform diagram at a small current, and FIG. 4 is a diagram showing an example of a modified circuit of the fault current detection device of the present invention. In the figure, 1 is an overhead ground wire, 2 is a current transformer, 3, 11~
14 is a resistor, 4 and 5 are Zener diodes, 6 is an LED, and 7 to 10 are diodes.
Claims (1)
極性はそのまま計測信号とし、他極性はツエナー
ダイオードで一定レベルにリミツトした更生信号
として取り出すブリツジ回路を有する故障電流検
出装置において、前記ブリツジ回路の計測信号用
の負荷抵抗値と更生信号用の負荷抵抗値を異なら
せ、更生信号がリミツトされる前の小電流時にお
ける更生信号と計測信号を識別が容易な程度に大
きさが異なる二つの信号として取り出すことを特
徴とする送電線の故障電流検出装置。 In a fault current detection device having a bridge circuit that outputs a signal in accordance with a fault current flowing in an overhead ground wire, one polarity is used as a measurement signal as it is, and the other polarity is taken out as a rehabilitation signal limited to a fixed level by a Zener diode. The load resistance value for the measurement signal and the load resistance value for the rehabilitation signal are made different, and the magnitude of the two signals differs to the extent that it is easy to distinguish between the rehabilitation signal and the measurement signal at the time of a small current before the rehabilitation signal is limited. A fault current detection device for a power transmission line, characterized in that the fault current is detected as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3697689U JPH02128967U (en) | 1989-03-30 | 1989-03-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3697689U JPH02128967U (en) | 1989-03-30 | 1989-03-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02128967U true JPH02128967U (en) | 1990-10-24 |
Family
ID=31543679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3697689U Pending JPH02128967U (en) | 1989-03-30 | 1989-03-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02128967U (en) |
-
1989
- 1989-03-30 JP JP3697689U patent/JPH02128967U/ja active Pending
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