JPS56108965A - Overcurrent detecting system - Google Patents
Overcurrent detecting systemInfo
- Publication number
- JPS56108965A JPS56108965A JP997780A JP997780A JPS56108965A JP S56108965 A JPS56108965 A JP S56108965A JP 997780 A JP997780 A JP 997780A JP 997780 A JP997780 A JP 997780A JP S56108965 A JPS56108965 A JP S56108965A
- Authority
- JP
- Japan
- Prior art keywords
- voltage drop
- power source
- inputted
- converter
- value
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/15—Indicating the presence of current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE:To perform overcurrent detection by setting to be operated automatically without any adjustment even at the changing of load constitution by storing a voltage drop value of the time when load current reaches to the steady state at every turning on of a power source and comparing the same with the voltage drop value which is being measured at all times. CONSTITUTION:When a power source is turned on, a relay 11 operates to apply an input voltage to a DC power source 1. After a certain time, steady load current flows. A voltage drop is produced between a DC power source 1 and load 2 by this steady load current, and this is inputted to an A/D converter 7 via an amplifier 5, and a filter 6. The voltage drop value (e) digitized by the converter 7 is inputted to a memory 8. The output of the memory 8 is sent to a D/A converter 9, and is converted to an analog value, after which it is inputted to one of a comparator 10. On the other hand, the voltage drop which is being monitored at all times by a detecting electric wire 4 is applied to the other of the comparator 10 through the amplifier 5 and the filter 6. By the timing of sampling pulses, both inputs are compared and if they exceed a set value, an abnormal signal 15 is emitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP997780A JPS56108965A (en) | 1980-02-01 | 1980-02-01 | Overcurrent detecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP997780A JPS56108965A (en) | 1980-02-01 | 1980-02-01 | Overcurrent detecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56108965A true JPS56108965A (en) | 1981-08-28 |
Family
ID=11734962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP997780A Pending JPS56108965A (en) | 1980-02-01 | 1980-02-01 | Overcurrent detecting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56108965A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58155366A (en) * | 1982-03-12 | 1983-09-16 | Hitachi Ltd | Abnormal current detecting circuit |
| CN110854991A (en) * | 2019-11-29 | 2020-02-28 | 苏州浪潮智能科技有限公司 | Power supply control circuit |
-
1980
- 1980-02-01 JP JP997780A patent/JPS56108965A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58155366A (en) * | 1982-03-12 | 1983-09-16 | Hitachi Ltd | Abnormal current detecting circuit |
| CN110854991A (en) * | 2019-11-29 | 2020-02-28 | 苏州浪潮智能科技有限公司 | Power supply control circuit |
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