JPS5471353A - Protection relay - Google Patents
Protection relayInfo
- Publication number
- JPS5471353A JPS5471353A JP13765877A JP13765877A JPS5471353A JP S5471353 A JPS5471353 A JP S5471353A JP 13765877 A JP13765877 A JP 13765877A JP 13765877 A JP13765877 A JP 13765877A JP S5471353 A JPS5471353 A JP S5471353A
- Authority
- JP
- Japan
- Prior art keywords
- wave
- negative
- positive
- band
- pass filter
- 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
Landscapes
- Protection Of Transformers (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To prevent surely misoperations by detecting reliably an accident and an inrush current when it flows with a digital arithmetic unit.
CONSTITUTION: Input data converted to digital code are applied to a positive rectifying circuit 20 and a negative rectifying circuit 21, separated to a positive wave and a negative wave, and each of them is applied to a positive band-pass filter 22 and a negative band-pass filter 23 respectively to isolate a fundamental wave component only from a positive wave and a negative wave. Each fundamental wave component isolated from both band-pass filters 22, 23 id applied to an arithmetic unit for a positive wave 24 and that for a negative wave 25 respectively to perform a relay decision operation and its result is applied to a logical unit 26 to detect a disagreement.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52137658A JPS5842692B2 (en) | 1977-11-16 | 1977-11-16 | Protective relay device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52137658A JPS5842692B2 (en) | 1977-11-16 | 1977-11-16 | Protective relay device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5471353A true JPS5471353A (en) | 1979-06-07 |
JPS5842692B2 JPS5842692B2 (en) | 1983-09-21 |
Family
ID=15203777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP52137658A Expired JPS5842692B2 (en) | 1977-11-16 | 1977-11-16 | Protective relay device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5842692B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57160324A (en) * | 1981-03-26 | 1982-10-02 | Mitsubishi Electric Corp | Transformer protecting relay unit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5061642A (en) * | 1973-10-01 | 1975-05-27 |
-
1977
- 1977-11-16 JP JP52137658A patent/JPS5842692B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5061642A (en) * | 1973-10-01 | 1975-05-27 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57160324A (en) * | 1981-03-26 | 1982-10-02 | Mitsubishi Electric Corp | Transformer protecting relay unit |
JPS6142492B2 (en) * | 1981-03-26 | 1986-09-22 | Mitsubishi Electric Corp |
Also Published As
Publication number | Publication date |
---|---|
JPS5842692B2 (en) | 1983-09-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS54137649A (en) | Digital protective relay device | |
JPS5471353A (en) | Protection relay | |
JPS564848A (en) | Restart system for computer | |
JPS56141640A (en) | Pulse detection circuit | |
JPS51133747A (en) | Transformer protection relay system of digital type | |
JPS5231629A (en) | Data communiction system | |
JPS5365951A (en) | Multi-terminal protective relay system | |
JPS5624633A (en) | Key input control system | |
JPS5425148A (en) | Pulse filter circuit | |
JPS52153141A (en) | Transformer protective relay system | |
JPS56100547A (en) | Data transmission system | |
JPS5366548A (en) | Grounding fault detector for dc circuit | |
JPS52140843A (en) | System for supervising current differential bus bar protection relay suppressing circuit | |
JPS5275961A (en) | Noise deletion equipment | |
JPS5588150A (en) | Self-check circuit of input-output part | |
JPS5473251A (en) | Protective relay | |
JPS5421550A (en) | Protective relay system | |
JPS5657133A (en) | Fault diagnostic system in decentralized control system | |
JPS52129250A (en) | Function test method for logical circuit | |
JPS5291152A (en) | Protective relay | |
JPS55134465A (en) | Recovery system in system having external memory unit | |
JPS5644945A (en) | Power failure processing system of data processing unit | |
JPS5659328A (en) | Abnormality detection circuit for electric power source | |
JPS5447975A (en) | Control circuit | |
JPS52153142A (en) | Transformer protective relay system |