JPS55123116A - Error compensating type current transformer - Google Patents

Error compensating type current transformer

Info

Publication number
JPS55123116A
JPS55123116A JP3046379A JP3046379A JPS55123116A JP S55123116 A JPS55123116 A JP S55123116A JP 3046379 A JP3046379 A JP 3046379A JP 3046379 A JP3046379 A JP 3046379A JP S55123116 A JPS55123116 A JP S55123116A
Authority
JP
Japan
Prior art keywords
impedance
load
secondary windings
main core
current transformer
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
JP3046379A
Other languages
Japanese (ja)
Inventor
Teruhiko Ito
Haruo Takahashi
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 JP3046379A priority Critical patent/JPS55123116A/en
Priority to GB8007357A priority patent/GB2045952B/en
Priority to US06/128,300 priority patent/US4309652A/en
Priority to FR8005744A priority patent/FR2451621B1/en
Publication of JPS55123116A publication Critical patent/JPS55123116A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
    • H01F27/422—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers
    • H01F27/427—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers for current transformers

Abstract

PURPOSE:To compensate errors at high precision by setting the value of a feedback impedance at a value obtainable through multiplying the sum of each impedance of secondary windings for a load and a main core by a given number. CONSTITUTION:In an equivalent circuit on secondary side, leakage impedances of secondary windings for a main core 20, an auxiliary core 21 are indicated by ZM, ZS, current sources IM, IS, and currents I2, aI2 are generated at number of turns a=N2/N3. Assuming a compensating feedback impedance be ZFO, a condition with ZF for compensation of an influence of ZM will be obtained at -I2ZM= ZF.I2(1-a)+ZL.I2 through a simple calculation. ZL is a load and ZF=ZFO+ ZM, in this case, Therefore, ZF=(ZL+ZM)/(a-1). By selecting at a=2, for example, the influence of ZM can be compensated by setting the feedback impedance ZF equal to the sum of each impedance of secondary windings on load and main core side, ZL+ZM.
JP3046379A 1979-03-15 1979-03-15 Error compensating type current transformer Pending JPS55123116A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP3046379A JPS55123116A (en) 1979-03-15 1979-03-15 Error compensating type current transformer
GB8007357A GB2045952B (en) 1979-03-15 1980-03-04 Current transforming circuits
US06/128,300 US4309652A (en) 1979-03-15 1980-03-07 Current transforming circuits
FR8005744A FR2451621B1 (en) 1979-03-15 1980-03-14 IMPROVEMENTS TO CURRENT TRANSFORMATION CIRCUITS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3046379A JPS55123116A (en) 1979-03-15 1979-03-15 Error compensating type current transformer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP58135415A Division JPS5931457A (en) 1983-07-25 1983-07-25 Electronic watthour meter

Publications (1)

Publication Number Publication Date
JPS55123116A true JPS55123116A (en) 1980-09-22

Family

ID=12304572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3046379A Pending JPS55123116A (en) 1979-03-15 1979-03-15 Error compensating type current transformer

Country Status (1)

Country Link
JP (1) JPS55123116A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5645011A (en) * 1979-09-20 1981-04-24 Toshiba Corp Error compensated current transformer
CN103105525A (en) * 2011-11-15 2013-05-15 华北电力科学研究院有限责任公司 Precision compensation method of current clamp, detection method and detection system using current clamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5645011A (en) * 1979-09-20 1981-04-24 Toshiba Corp Error compensated current transformer
CN103105525A (en) * 2011-11-15 2013-05-15 华北电力科学研究院有限责任公司 Precision compensation method of current clamp, detection method and detection system using current clamp

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