JPS5550168A - Overcurrent detector for electric circuit - Google Patents

Overcurrent detector for electric circuit

Info

Publication number
JPS5550168A
JPS5550168A JP12357778A JP12357778A JPS5550168A JP S5550168 A JPS5550168 A JP S5550168A JP 12357778 A JP12357778 A JP 12357778A JP 12357778 A JP12357778 A JP 12357778A JP S5550168 A JPS5550168 A JP S5550168A
Authority
JP
Japan
Prior art keywords
resistor
magnetic
circuit member
load current
magnetic circuit
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
JP12357778A
Other languages
Japanese (ja)
Inventor
Yasuo Kasahara
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.)
TOKYO KINZOKU KK
Original Assignee
TOKYO KINZOKU KK
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 TOKYO KINZOKU KK filed Critical TOKYO KINZOKU KK
Priority to JP12357778A priority Critical patent/JPS5550168A/en
Publication of JPS5550168A publication Critical patent/JPS5550168A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To execute anti-timing operation as to a weak current, by providing an electroconductive magnetic resistor between a contactor and a leg of a U-shaped magnetic circuit member, coupling the resistor to the leg and passing a load current through the magnetic resistor.
CONSTITUTION: A load current I, which is detected, flows through an external terminal, contacts 5, 6, a lead wire 6a and a magnetic resistor 7 so that the resistor heats. When the heat generated by the resistor is more than that transferred therefrom, the temperature of the resistor rises gradually. As a result, the magnetic flux density of the resistor 7 and an U-shaped magnetic circuit member 2 falls sharply. When the magnetic flux density falls below a prescribed level, the magnetic attractive force is overcome by the force of a spring 9 so that a contactor 3 is separated from the magnetic circuit member 2, the contact 6 is brought out of touch with the contact 5 and the load current I is cut off. An anti-timing property is thus attained.
COPYRIGHT: (C)1980,JPO&Japio
JP12357778A 1978-10-09 1978-10-09 Overcurrent detector for electric circuit Pending JPS5550168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12357778A JPS5550168A (en) 1978-10-09 1978-10-09 Overcurrent detector for electric circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12357778A JPS5550168A (en) 1978-10-09 1978-10-09 Overcurrent detector for electric circuit

Publications (1)

Publication Number Publication Date
JPS5550168A true JPS5550168A (en) 1980-04-11

Family

ID=14864020

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12357778A Pending JPS5550168A (en) 1978-10-09 1978-10-09 Overcurrent detector for electric circuit

Country Status (1)

Country Link
JP (1) JPS5550168A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60143542A (en) * 1983-12-28 1985-07-29 株式会社トーキン Overcurrent breaking switch
JPS60182634A (en) * 1984-02-29 1985-09-18 武井　信子 Circuit protector
JPH01157026A (en) * 1987-09-03 1989-06-20 Merlin Gerin Electromagnetic tripping apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60143542A (en) * 1983-12-28 1985-07-29 株式会社トーキン Overcurrent breaking switch
JPH0457055B2 (en) * 1983-12-28 1992-09-10 Tokin Corp
JPS60182634A (en) * 1984-02-29 1985-09-18 武井　信子 Circuit protector
JPH0228217B2 (en) * 1984-02-29 1990-06-22 Takei Nobuko
JPH01157026A (en) * 1987-09-03 1989-06-20 Merlin Gerin Electromagnetic tripping apparatus

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