JPS5454255A - Protective relay device - Google Patents
Protective relay deviceInfo
- Publication number
- JPS5454255A JPS5454255A JP11944477A JP11944477A JPS5454255A JP S5454255 A JPS5454255 A JP S5454255A JP 11944477 A JP11944477 A JP 11944477A JP 11944477 A JP11944477 A JP 11944477A JP S5454255 A JPS5454255 A JP S5454255A
- Authority
- JP
- Japan
- Prior art keywords
- output
- relay
- adder
- converter
- relay device
- 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
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To enhance reliability by preventing the operation of relay alone deemed to be making maloperation, but not excessibely, by detecting exactly error due to noise, etc. of converter.
CONSTITUTION: The converter 1 which converts current flowing in the transmission line L to be protected into a predetermined value consists of the converters TA to TC, the adder AD1 which calculates and outputs input sum, and the converter TZ which converts the output from the adder. The converters contain filter, etc. by which higher harmonic wave contained in input is removed. The relay device 2 consists of the relay devices RAB to RCA which operate in response to the output of the device 1, and the monitoring device 3 consists of the subtracting circuit SU which uses as input the output of the device 1 and calculates the difference between the output of the adder AD2 and one of the outputs of the device 1 and the comparators AB CPAB to CPCA which compare the output of the substacting circuit and according to the value compared, send a rejection signal to the relay device. Thus, exact rejection to the relay device is made possible
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11944477A JPS5454255A (en) | 1977-10-06 | 1977-10-06 | Protective relay device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11944477A JPS5454255A (en) | 1977-10-06 | 1977-10-06 | Protective relay device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5454255A true JPS5454255A (en) | 1979-04-28 |
JPS611976B2 JPS611976B2 (en) | 1986-01-21 |
Family
ID=14761548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11944477A Granted JPS5454255A (en) | 1977-10-06 | 1977-10-06 | Protective relay device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5454255A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6118311A (en) * | 1984-07-04 | 1986-01-27 | 三菱電機株式会社 | Digital protective relaying device |
JPH06169529A (en) * | 1992-12-01 | 1994-06-14 | Tokyo Electric Power Co Inc:The | Protection circuit in system interconnection inverter |
-
1977
- 1977-10-06 JP JP11944477A patent/JPS5454255A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6118311A (en) * | 1984-07-04 | 1986-01-27 | 三菱電機株式会社 | Digital protective relaying device |
JPH06169529A (en) * | 1992-12-01 | 1994-06-14 | Tokyo Electric Power Co Inc:The | Protection circuit in system interconnection inverter |
Also Published As
Publication number | Publication date |
---|---|
JPS611976B2 (en) | 1986-01-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57142568A (en) | Earth trouble detecting device for dc power transmission system | |
JPS5454255A (en) | Protective relay device | |
JPS56150340A (en) | Semiconductor detector for nitrogen oxide | |
JPS5232655A (en) | Logic low-pass filter circuit | |
JPS5370653A (en) | Digital output unit | |
JPS54115745A (en) | Distance relay | |
JPS55154808A (en) | Phase difference detecting circuit | |
JPS5630656A (en) | Digital signal sn measuring apparatus | |
JPS6116756Y2 (en) | ||
JPS5635222A (en) | Position control device | |
JPS53133470A (en) | Convergence value detecting system | |
JPS54152952A (en) | A-d converter | |
JPS53101968A (en) | Modulating converter for pcm-forecast code | |
JPS5330258A (en) | Analog-digital conversion circuit | |
JPS5797221A (en) | Peak-to-peak value detecting circuit | |
JPS52151842A (en) | Trouble detecting device of cyclo converter | |
JPS5377412A (en) | Noise eliminating circuit | |
JPS5465905A (en) | Circuit for detecting loose contact | |
JPS52111642A (en) | Input converter | |
JPS5434670A (en) | Freqency discriminator | |
JPS55693A (en) | Tuner | |
JPS5444738A (en) | Stack direction relay device | |
JPS52110450A (en) | Protective relaying equipment | |
JPS5461580A (en) | Watt meter | |
JPS54150655A (en) | Detecting trouble of induction motor |