JPS648820A - Current-type differential relay - Google Patents
Current-type differential relayInfo
- Publication number
- JPS648820A JPS648820A JP62160874A JP16087487A JPS648820A JP S648820 A JPS648820 A JP S648820A JP 62160874 A JP62160874 A JP 62160874A JP 16087487 A JP16087487 A JP 16087487A JP S648820 A JPS648820 A JP S648820A
- Authority
- JP
- Japan
- Prior art keywords
- current
- differential
- relay
- detecting means
- sensitivity
- 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
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE:To enable the error output of a differential relay to be prevented from being generated, by detecting the change of the scale of difference current before compensating charging current, and by lowering differential detecting sensitivity in case that the scale of the difference current is of a specified value or lese. CONSTITUTION:A current-type differential relay 10 is composed of a charging current compensation quantity computing means 11, a differential current detecting means 12, a change component detecting means 13, and an arithmetic means 14. By the charging current compensation quantity computing means 11, the input of the voltage of a self end is provided and a compensation quantity for charging current is computed. By the differential current detecting means 12, the input of the current of a self end and a remote end is provided and difference current is detected, and it is detected by the detecting means 13 whether the change component of the difference current is of a specified value or more, or not, and according to its result, the sensitivity of the relay is changed. Without lowering the sensitivity of the relay, discrimination output may be locked.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62160874A JPS648820A (en) | 1987-06-30 | 1987-06-30 | Current-type differential relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62160874A JPS648820A (en) | 1987-06-30 | 1987-06-30 | Current-type differential relay |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS648820A true JPS648820A (en) | 1989-01-12 |
Family
ID=15724236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62160874A Pending JPS648820A (en) | 1987-06-30 | 1987-06-30 | Current-type differential relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS648820A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5189589A (en) * | 1989-09-25 | 1993-02-23 | Bodenseewerk Geratetechnik Gmbh | Power controller |
-
1987
- 1987-06-30 JP JP62160874A patent/JPS648820A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5189589A (en) * | 1989-09-25 | 1993-02-23 | Bodenseewerk Geratetechnik Gmbh | Power controller |
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