JPS5451276A - Power failure detection indicating circuit - Google Patents
Power failure detection indicating circuitInfo
- Publication number
- JPS5451276A JPS5451276A JP11818477A JP11818477A JPS5451276A JP S5451276 A JPS5451276 A JP S5451276A JP 11818477 A JP11818477 A JP 11818477A JP 11818477 A JP11818477 A JP 11818477A JP S5451276 A JPS5451276 A JP S5451276A
- Authority
- JP
- Japan
- Prior art keywords
- power failure
- indicating
- commercial
- timer
- circuit
- 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
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
PURPOSE: To provide an indicating circuit which enables indicating of the genuine failure of commercial power supply during the artificial suspension of the power by connecting a battery of a given voltage to a control end of a given circuit with a commercial power failure indicating element as a load in parallel together with the end of commercial rectified smooth voltage.
CONSTITUTION: When a checkingswitch is opened for inspection, a relay 6 is deenergized to close a normally closed contact 7 thereby actuating a timer 8. At this point, a normally open contact of the timer 8 is opened. This suspends commercial energization of an emergency lamp 3 and with suspension of a relay 14, a contact 15 is closed to allow a battery 13 to turn on an incandescent lamp. At the same time, a checking device not illustrated works to start the measurement of electricity. As a fixed time set by the timer 8 passes by, the related circuit is reenergized to memorize and indicate the results of the checking. If a genuin power failure occur during the checking, the output voltage of a power failure detection indicating circuit is reduced to zero so that the terminal voltage of a smoothing capacitor 19 reduces to zero. This allows a light emitting diode 24 to be energized thereby indicating the power failure
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11818477A JPS5451276A (en) | 1977-09-30 | 1977-09-30 | Power failure detection indicating circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11818477A JPS5451276A (en) | 1977-09-30 | 1977-09-30 | Power failure detection indicating circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5451276A true JPS5451276A (en) | 1979-04-21 |
Family
ID=14730215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11818477A Pending JPS5451276A (en) | 1977-09-30 | 1977-09-30 | Power failure detection indicating circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5451276A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020080629A (en) * | 2001-04-16 | 2002-10-26 | 하임수 | Electric power outage detection circuit for electronic ballasts for fluorescent lamps |
-
1977
- 1977-09-30 JP JP11818477A patent/JPS5451276A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020080629A (en) * | 2001-04-16 | 2002-10-26 | 하임수 | Electric power outage detection circuit for electronic ballasts for fluorescent lamps |
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