JPS5624618A - Protection circuit of current control circuit using direct current transformer - Google Patents
Protection circuit of current control circuit using direct current transformerInfo
- Publication number
- JPS5624618A JPS5624618A JP10107979A JP10107979A JPS5624618A JP S5624618 A JPS5624618 A JP S5624618A JP 10107979 A JP10107979 A JP 10107979A JP 10107979 A JP10107979 A JP 10107979A JP S5624618 A JPS5624618 A JP S5624618A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- detection
- current transformers
- difference
- direct current
- 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
- Control Of Voltage And Current In General (AREA)
Abstract
PURPOSE: To prevent the overcurrent of the main circuit and permit an effective protecting action of high reliability by using the circuit protecting action together with the protecting action due to the detection difference of the detection output by two or more direct current transformers.
CONSTITUTION: In the load 10, a plurality of direct current transformers 16, 24 for detecting a main circuit current I to be fed is provided, and the current transformer 24 is used for the circuit protection and the detection output (f) is fed to FF22 constituting the protection circuit. The detection output (a), (b) of the current transformers 16, 24 are respectively added to the difference detection circuit 26 constituted for the detection of the difference FF, and the detection output (a) is added to the comparator 18. To this circuit 26 the reference value B is added and when the difference between the output signals (a), (b) exceeds the reference value B, off action signal is fed to the semiconductor switch 12 through the amplifier 20. When either one of the current transformers 16, 24 fails, and exceeds the reference value B, the output signals (a), (b) of the respective current transformers 16, 24 are detected by the comparator 18 or FF22, detecting the overcurrent the main circuit without turning off the switch 12.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10107979A JPS5624618A (en) | 1979-08-08 | 1979-08-08 | Protection circuit of current control circuit using direct current transformer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10107979A JPS5624618A (en) | 1979-08-08 | 1979-08-08 | Protection circuit of current control circuit using direct current transformer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5624618A true JPS5624618A (en) | 1981-03-09 |
Family
ID=14291086
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10107979A Pending JPS5624618A (en) | 1979-08-08 | 1979-08-08 | Protection circuit of current control circuit using direct current transformer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5624618A (en) |
-
1979
- 1979-08-08 JP JP10107979A patent/JPS5624618A/en active Pending
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