JPS57151865A - Abnormal current detecting device - Google Patents

Abnormal current detecting device

Info

Publication number
JPS57151865A
JPS57151865A JP3809481A JP3809481A JPS57151865A JP S57151865 A JPS57151865 A JP S57151865A JP 3809481 A JP3809481 A JP 3809481A JP 3809481 A JP3809481 A JP 3809481A JP S57151865 A JPS57151865 A JP S57151865A
Authority
JP
Japan
Prior art keywords
magnetic path
shaped magnetic
current
detecting device
short 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
JP3809481A
Other languages
Japanese (ja)
Inventor
Takao Onaga
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP3809481A priority Critical patent/JPS57151865A/en
Publication of JPS57151865A publication Critical patent/JPS57151865A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers

Abstract

PURPOSE:To obtain the abnormal current detecting device which is quickly operated at the time of short circuit a compact constitution, by amplifying and applying the current detected through a secondary winding of a ring shaped magnetic path to a coil of a C shaped magnetic path that forms a fixed core together with the ring shaped magnetic path. CONSTITUTION:When an overcurrent flows in a primary winding 7, the magnetic flux in the ring shaped magnetic path A of the fixed core 6 varies and the detected current flows in the primary winding 8. When said current exceeds a specified value owing to the short circuit of the winding 7 and the like, leaked magnetic flux is generated by the current which is applied to the coil 10 of the C shaped magnetic path C that is formed on the core 9, through an amplifier 9. The movable iron piece 11, to which the elastic force of a spring 12 is applied, is attracted to the core 6 by said leaked magnetic flux. In this constitution, wherein a transformer, a relay, and the like are not required, the configuration of the abnormal current detecting device becomes small, and the device is quickly operated at the time of the short circuit.
JP3809481A 1981-03-14 1981-03-14 Abnormal current detecting device Pending JPS57151865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3809481A JPS57151865A (en) 1981-03-14 1981-03-14 Abnormal current detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3809481A JPS57151865A (en) 1981-03-14 1981-03-14 Abnormal current detecting device

Publications (1)

Publication Number Publication Date
JPS57151865A true JPS57151865A (en) 1982-09-20

Family

ID=12515880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3809481A Pending JPS57151865A (en) 1981-03-14 1981-03-14 Abnormal current detecting device

Country Status (1)

Country Link
JP (1) JPS57151865A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016008113A1 (en) * 2014-07-16 2016-01-21 General Electric Company Devices with combined unbalanced current sensor and solenoid coil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016008113A1 (en) * 2014-07-16 2016-01-21 General Electric Company Devices with combined unbalanced current sensor and solenoid coil

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