JPS5458845A - Step-out relay - Google Patents
Step-out relayInfo
- Publication number
- JPS5458845A JPS5458845A JP12440677A JP12440677A JPS5458845A JP S5458845 A JPS5458845 A JP S5458845A JP 12440677 A JP12440677 A JP 12440677A JP 12440677 A JP12440677 A JP 12440677A JP S5458845 A JPS5458845 A JP S5458845A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- time
- relay
- level detection
- 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
- 238000001514 detection method Methods 0.000 abstract 6
- 206010044565 Tremor Diseases 0.000 abstract 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To detect exactly step-out with one distance relay by measuring time difference between the first and second D.C. level detection circuits when detecting system tremble impedance from the relay-setting point by using a distance relay.
CONSTITUTION: The current input 22 and the voltage input 24 are converted into each appropriate volatge by the transformers 42 and 40, and the converted valure of voltage is put through the polar inversion circuit 44 into the analog multiplier circuit 48 and that of current is put through the distance-measuring circuit 46 into the circuit 48. They are introduced through the filter circuit 50 to the first D.C. level detection circuit 52 and the second D.C. level detection circuit 54, which detect the operational limitation of mho characteristic, and an output as much as the time difference of output between both is given from the AND circuit 56 to apply to the time circuit 58. Thus, even if a time determined as a step-out detection time in advance has passed, when the output of the AND circuit 56 does not become OFF, a step-out detection output is drawn and thus step-out detection mmde possible by only on distance relay
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12440677A JPS5458845A (en) | 1977-10-19 | 1977-10-19 | Step-out relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12440677A JPS5458845A (en) | 1977-10-19 | 1977-10-19 | Step-out relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5458845A true JPS5458845A (en) | 1979-05-11 |
| JPS615335B2 JPS615335B2 (en) | 1986-02-18 |
Family
ID=14884660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12440677A Granted JPS5458845A (en) | 1977-10-19 | 1977-10-19 | Step-out relay |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5458845A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03127030U (en) * | 1990-03-31 | 1991-12-20 |
-
1977
- 1977-10-19 JP JP12440677A patent/JPS5458845A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS615335B2 (en) | 1986-02-18 |
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