JPS54111647A - Protective relay apparatus for transformer - Google Patents
Protective relay apparatus for transformerInfo
- Publication number
- JPS54111647A JPS54111647A JP1949478A JP1949478A JPS54111647A JP S54111647 A JPS54111647 A JP S54111647A JP 1949478 A JP1949478 A JP 1949478A JP 1949478 A JP1949478 A JP 1949478A JP S54111647 A JPS54111647 A JP S54111647A
- Authority
- JP
- Japan
- Prior art keywords
- output
- transformer
- harmonic wave
- inrush
- voltage
- 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
Abstract
PURPOSE: To eliminate mulfunctioning otherwise caused by inrush current while free from second harmonic wave when encountering internal trouble by actuating the second harmonic wave control circuit within a specified time requiring a countermeasure against inrush.
CONSTITUTION: This utilizes the nature of the transformer that inrush is generated only when the voltage of the transformer exceeds a certain value as does at the start thereof. The voltage is detected with a voltage detector 1. The output thereof is applied to drive a one shoot multi-vibrator 12 thereby allowing the output V8 of a second harmonic wave detection circuit 8 to pass through a gate. The output 8 is inputted to an inhibit circuit 9 to lock the output V6 of a ratio differential relay. In this manner, mulfunctioning of the transformer protective relay due to the inrush current can be prevented. On the other hand, since the power of the transformer lowers whenever any internal trouble occurs, the voltage detector 11 provides no output. Thus the output V8 of the harmonic wave detection circuit 8 is refused to pass through the gate, so that the protective relay operates normally.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1949478A JPS54111647A (en) | 1978-02-21 | 1978-02-21 | Protective relay apparatus for transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1949478A JPS54111647A (en) | 1978-02-21 | 1978-02-21 | Protective relay apparatus for transformer |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54111647A true JPS54111647A (en) | 1979-09-01 |
JPS5756289B2 JPS5756289B2 (en) | 1982-11-29 |
Family
ID=12000912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1949478A Granted JPS54111647A (en) | 1978-02-21 | 1978-02-21 | Protective relay apparatus for transformer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54111647A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5662031A (en) * | 1979-10-26 | 1981-05-27 | Mitsubishi Electric Corp | Distance relay device |
EP0097321A2 (en) * | 1982-06-23 | 1984-01-04 | Mitsubishi Denki Kabushiki Kaisha | Protective relay with second harmonic suppression |
JPH04364317A (en) * | 1991-06-11 | 1992-12-16 | Mitsubishi Electric Corp | Lock system for current differential relay |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01142596U (en) * | 1988-03-24 | 1989-09-29 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52115347A (en) * | 1976-03-25 | 1977-09-27 | Toshiba Corp | Protecting relay device |
-
1978
- 1978-02-21 JP JP1949478A patent/JPS54111647A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52115347A (en) * | 1976-03-25 | 1977-09-27 | Toshiba Corp | Protecting relay device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5662031A (en) * | 1979-10-26 | 1981-05-27 | Mitsubishi Electric Corp | Distance relay device |
EP0097321A2 (en) * | 1982-06-23 | 1984-01-04 | Mitsubishi Denki Kabushiki Kaisha | Protective relay with second harmonic suppression |
JPH04364317A (en) * | 1991-06-11 | 1992-12-16 | Mitsubishi Electric Corp | Lock system for current differential relay |
Also Published As
Publication number | Publication date |
---|---|
JPS5756289B2 (en) | 1982-11-29 |
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