JPS5624618A - Protection circuit of current control circuit using direct current transformer - Google Patents

Protection circuit of current control circuit using direct current transformer

Info

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
Application number
JP10107979A
Other languages
Japanese (ja)
Inventor
Masakatsu Ogami
Hidehiko Sugimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP10107979A priority Critical patent/JPS5624618A/en
Publication of JPS5624618A publication Critical patent/JPS5624618A/en
Pending legal-status Critical Current

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
JP10107979A 1979-08-08 1979-08-08 Protection circuit of current control circuit using direct current transformer Pending JPS5624618A (en)

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)

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