JPH02138951U - - Google Patents
Info
- Publication number
- JPH02138951U JPH02138951U JP4835689U JP4835689U JPH02138951U JP H02138951 U JPH02138951 U JP H02138951U JP 4835689 U JP4835689 U JP 4835689U JP 4835689 U JP4835689 U JP 4835689U JP H02138951 U JPH02138951 U JP H02138951U
- Authority
- JP
- Japan
- Prior art keywords
- voltage detection
- line voltage
- detection device
- photo coupler
- communication system
- 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 claims description 5
- 238000010586 diagram Methods 0.000 description 2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4835689U JPH02138951U (cs) | 1989-04-25 | 1989-04-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4835689U JPH02138951U (cs) | 1989-04-25 | 1989-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02138951U true JPH02138951U (cs) | 1990-11-20 |
Family
ID=31565089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4835689U Pending JPH02138951U (cs) | 1989-04-25 | 1989-04-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02138951U (cs) |
-
1989
- 1989-04-25 JP JP4835689U patent/JPH02138951U/ja active Pending
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