JPS5656616A - Current transformer - Google Patents

Current transformer

Info

Publication number
JPS5656616A
JPS5656616A JP13205679A JP13205679A JPS5656616A JP S5656616 A JPS5656616 A JP S5656616A JP 13205679 A JP13205679 A JP 13205679A JP 13205679 A JP13205679 A JP 13205679A JP S5656616 A JPS5656616 A JP S5656616A
Authority
JP
Japan
Prior art keywords
turns
current
load
amplifier
output terminals
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
JP13205679A
Other languages
Japanese (ja)
Inventor
Ryoji Gamo
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13205679A priority Critical patent/JPS5656616A/en
Publication of JPS5656616A publication Critical patent/JPS5656616A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/32—Circuit arrangements

Abstract

PURPOSE:To obtain the current transformer particularly requiring a large current ratio by taking out a differential current through connecting two sets of secondary side windings different in number of turns each other in antiphase parallel. CONSTITUTION:A primary winding 11 in number of turns N11 is provided on a core 10, windings 21, 22 in number of turns N21, N22 are provided in antiphase parallel connection on secondary side, and a load resistance 25 is connected between common output terminals 23, 24. In this case, a relation between current I2 flowing in the resistance 25 and currents I21, I22 of each winding stands as I2=I21-I22= I11/N21-I11/N22. I21 is greater than I22 when N21 is less than N22, therefore a large current ratio is obtainable with less number of turns from selecting N22 pertinently. Where OP amplifier is incorporated in a load, a load impedance vierwed from the common output terminals works almost at OOMEGA for feedback action of the amplifier, therefore the current can be measured at high precision.
JP13205679A 1979-10-13 1979-10-13 Current transformer Pending JPS5656616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13205679A JPS5656616A (en) 1979-10-13 1979-10-13 Current transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13205679A JPS5656616A (en) 1979-10-13 1979-10-13 Current transformer

Publications (1)

Publication Number Publication Date
JPS5656616A true JPS5656616A (en) 1981-05-18

Family

ID=15072481

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13205679A Pending JPS5656616A (en) 1979-10-13 1979-10-13 Current transformer

Country Status (1)

Country Link
JP (1) JPS5656616A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105006358A (en) * 2015-06-29 2015-10-28 国网山东省电力公司淄博供电公司 Current transformer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5025610A (en) * 1973-03-07 1975-03-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5025610A (en) * 1973-03-07 1975-03-18

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105006358A (en) * 2015-06-29 2015-10-28 国网山东省电力公司淄博供电公司 Current transformer

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