JPS54147875A - Current detector - Google Patents
Current detectorInfo
- Publication number
- JPS54147875A JPS54147875A JP5553978A JP5553978A JPS54147875A JP S54147875 A JPS54147875 A JP S54147875A JP 5553978 A JP5553978 A JP 5553978A JP 5553978 A JP5553978 A JP 5553978A JP S54147875 A JPS54147875 A JP S54147875A
- Authority
- JP
- Japan
- Prior art keywords
- current
- resistance
- light emitting
- protection
- emitting diode
- 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
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
PURPOSE: To protect the elements constituting the current detecting circuit and let the protection of load and the protection of power source operate surely by shunting the increments from where the current flowing in the current detecting circuit exceeds a certain value.
CONSTITUTION: When current flows in a DC detecting resistance 1, current flows in a light emitting diode 3 by a voltage dividing resistance 5 and a current limiting reisitance 9, causing a transistor 2 to conduct. The change in the current flowing in the detecting resistnace 1 is then drawn out as the change of the voltage output across the resitance 6. When the current flowing in the detection resistance 1 increases and the current begins to flow to a diode 10 for constant voltage, the voltage across the series circuit of the light emitting diode 3 and current limiting resistance 9 no longer increases and the current flowing in the light emitting diode 3 no longer exceeds the fixed value and therefore breaking down of the current detecting circuit will not occur and the feedback to and protection of automatic control unit become sure and safe.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5553978A JPS54147875A (en) | 1978-05-12 | 1978-05-12 | Current detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5553978A JPS54147875A (en) | 1978-05-12 | 1978-05-12 | Current detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54147875A true JPS54147875A (en) | 1979-11-19 |
Family
ID=13001514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5553978A Pending JPS54147875A (en) | 1978-05-12 | 1978-05-12 | Current detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54147875A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195573U (en) * | 1983-06-13 | 1984-12-26 | 三洋電機株式会社 | Overcurrent detection circuit |
| JPS63145970A (en) * | 1986-12-09 | 1988-06-18 | Mitsunori Ashimura | Alternating current electrification detector |
| US6671144B1 (en) | 2000-06-26 | 2003-12-30 | Premier Aviation, Inc. | Method and apparatus for detecting ground faults and for isolating power supply from the ground faults |
| US7233463B2 (en) | 2000-06-26 | 2007-06-19 | Premier Aviation, Inc. | Method and apparatus for detecting electrical faults and isolating power source from the electrical faults |
-
1978
- 1978-05-12 JP JP5553978A patent/JPS54147875A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195573U (en) * | 1983-06-13 | 1984-12-26 | 三洋電機株式会社 | Overcurrent detection circuit |
| JPS63145970A (en) * | 1986-12-09 | 1988-06-18 | Mitsunori Ashimura | Alternating current electrification detector |
| US6671144B1 (en) | 2000-06-26 | 2003-12-30 | Premier Aviation, Inc. | Method and apparatus for detecting ground faults and for isolating power supply from the ground faults |
| US7233463B2 (en) | 2000-06-26 | 2007-06-19 | Premier Aviation, Inc. | Method and apparatus for detecting electrical faults and isolating power source from the electrical faults |
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