JPS548849A - Electric source trouble detecting lock device - Google Patents
Electric source trouble detecting lock deviceInfo
- Publication number
- JPS548849A JPS548849A JP7402677A JP7402677A JPS548849A JP S548849 A JPS548849 A JP S548849A JP 7402677 A JP7402677 A JP 7402677A JP 7402677 A JP7402677 A JP 7402677A JP S548849 A JPS548849 A JP S548849A
- Authority
- JP
- Japan
- Prior art keywords
- lock device
- electric source
- trouble detecting
- detecting lock
- source trouble
- 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 prevent error operation of a protective relay device, by detecting abnormal state of controlled voltage of an operational amplifier in a protective relay device which has the operational amplifier.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7402677A JPS548849A (en) | 1977-06-21 | 1977-06-21 | Electric source trouble detecting lock device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7402677A JPS548849A (en) | 1977-06-21 | 1977-06-21 | Electric source trouble detecting lock device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS548849A true JPS548849A (en) | 1979-01-23 |
Family
ID=13535194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7402677A Pending JPS548849A (en) | 1977-06-21 | 1977-06-21 | Electric source trouble detecting lock device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS548849A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4924002A (en) * | 1972-06-24 | 1974-03-04 |
-
1977
- 1977-06-21 JP JP7402677A patent/JPS548849A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4924002A (en) * | 1972-06-24 | 1974-03-04 |
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