JPS54110449A - Relay - Google Patents
RelayInfo
- Publication number
- JPS54110449A JPS54110449A JP1714878A JP1714878A JPS54110449A JP S54110449 A JPS54110449 A JP S54110449A JP 1714878 A JP1714878 A JP 1714878A JP 1714878 A JP1714878 A JP 1714878A JP S54110449 A JPS54110449 A JP S54110449A
- Authority
- JP
- Japan
- Prior art keywords
- level detection
- output
- slla
- detection circuits
- sllb
- 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
- 238000001514 detection method Methods 0.000 abstract 9
- 230000007423 decrease Effects 0.000 abstract 2
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To automatically and accurately detect the detection level variation of a realy with level detection circuits and its complete fault mode by checking the output unmatch of the respective level detection circuits.
CONSTITUTION: When the respective level detection values of the level detection circuits SLLA and SLLB are equal, the output of the AND gate AND (A) remains 0 since the input current of the respective level detection circuits SLLA and SLLB is common in the cheching AC power supply ACT. Thus, the input of the timer circuit TA is always set to 0 and no fault output is detected from the relay RYA. If the level detection value of the level detection circuit SLLA rises due to any causes, the duty of this output square wave decreases. Accordingly, the AND gate AND (A) outputs pulses. When these pulse widths exceed the specified value, the timer circuit TA operates and the fault output is detected from the relay RYA. This applies to the case where the level detection where decreases.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1714878A JPS54110449A (en) | 1978-02-17 | 1978-02-17 | Relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1714878A JPS54110449A (en) | 1978-02-17 | 1978-02-17 | Relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54110449A true JPS54110449A (en) | 1979-08-29 |
Family
ID=11935896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1714878A Pending JPS54110449A (en) | 1978-02-17 | 1978-02-17 | Relay |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54110449A (en) |
-
1978
- 1978-02-17 JP JP1714878A patent/JPS54110449A/en active Pending
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