JPS54114738A - Protective relay - Google Patents
Protective relayInfo
- Publication number
- JPS54114738A JPS54114738A JP2226978A JP2226978A JPS54114738A JP S54114738 A JPS54114738 A JP S54114738A JP 2226978 A JP2226978 A JP 2226978A JP 2226978 A JP2226978 A JP 2226978A JP S54114738 A JPS54114738 A JP S54114738A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- zero
- signal
- circuit
- phase 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 prevent mal-operation due to internal current by the procedure in which even in case where operation is made in multiple terminal system where several terminals are broken, zero-phase voltage is selected automatically from zero-phase voltages transferred from each terminal and then introduced into relay.
CONSTITUTION: The zero-phase voltages VOA to VOC of the plural terminals A to C and the using condition signal S for the breaker or line breaker of the terminal A are logically judged by the logical operation circuits 31A to 31C and 33A to 33C, and when the breaker of one terminal is open-circuit, the zero-phase voltage of the other terminal is used as a criterion, whereas when it is close-circuit, the zero-phase voltage of self-terminal is used. For example, when terminals other than the terminal A are break terminals the using condition S for the terminal A becomes "1", so that the "and" circuits 31B and 31C are locked by the not condition -S for S. Thus, the output signal alone of the circuit 31A becomes square wave signal and by a signal converted the signal into the run "1" signal at the time delay circuit 33A, the gate circuit 35A alone becomes opened state. Accordingly, the zero-phase voltage VOA' of the terminal A is used for internal charge current supplement.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2226978A JPS54114738A (en) | 1978-02-28 | 1978-02-28 | Protective relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2226978A JPS54114738A (en) | 1978-02-28 | 1978-02-28 | Protective relay |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54114738A true JPS54114738A (en) | 1979-09-07 |
JPS6111052B2 JPS6111052B2 (en) | 1986-04-01 |
Family
ID=12078037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2226978A Granted JPS54114738A (en) | 1978-02-28 | 1978-02-28 | Protective relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54114738A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01169652U (en) * | 1988-05-23 | 1989-11-30 | ||
JPH0246351A (en) * | 1988-08-08 | 1990-02-15 | Daishowa Seiki Co Ltd | Epicyclic transmission |
-
1978
- 1978-02-28 JP JP2226978A patent/JPS54114738A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6111052B2 (en) | 1986-04-01 |
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