JPS6434131A - Protective relay - Google Patents
Protective relayInfo
- Publication number
- JPS6434131A JPS6434131A JP18762587A JP18762587A JPS6434131A JP S6434131 A JPS6434131 A JP S6434131A JP 18762587 A JP18762587 A JP 18762587A JP 18762587 A JP18762587 A JP 18762587A JP S6434131 A JPS6434131 A JP S6434131A
- Authority
- JP
- Japan
- Prior art keywords
- zero
- voltages
- circuit
- deviation
- transformer
- 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 detect a fault on the secondary side of a potential transformer by a simple circuit by leading a zero-phase electric amount from the secondary and tertiary voltages of the transformer, and generating an output when a deviation is a predetermined value or more. CONSTITUTION:The secondary voltages VR, VS, BT of a potential transformer of a master/slave type connected to 3 phases are fed to a zero-phase electric amount leading circuit 24 to produce a zero-phase voltage V0. The tertiary voltages VR', VS', VT' of the same transformer are fed to another zero-phase electric amount leading circuit 25 to produce a zero-phase voltage V0'. These voltages V0, V0' are input to a deviation circuit 26 to detect a deviation (V0'-V0). If the value is larger than a predetermined value set to a level detector 27, an operation output signal is generated from a protective relay 17.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18762587A JPS6434131A (en) | 1987-07-29 | 1987-07-29 | Protective relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18762587A JPS6434131A (en) | 1987-07-29 | 1987-07-29 | Protective relay |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6434131A true JPS6434131A (en) | 1989-02-03 |
Family
ID=16209382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18762587A Pending JPS6434131A (en) | 1987-07-29 | 1987-07-29 | Protective relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6434131A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013135129A (en) * | 2011-12-27 | 2013-07-08 | Toshiba Corp | Abnormality detection method of instrument transformer and protection method of circuit |
-
1987
- 1987-07-29 JP JP18762587A patent/JPS6434131A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013135129A (en) * | 2011-12-27 | 2013-07-08 | Toshiba Corp | Abnormality detection method of instrument transformer and protection method of circuit |
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