JPS5654020A - Error compensation type current transformer - Google Patents

Error compensation type current transformer

Info

Publication number
JPS5654020A
JPS5654020A JP12975079A JP12975079A JPS5654020A JP S5654020 A JPS5654020 A JP S5654020A JP 12975079 A JP12975079 A JP 12975079A JP 12975079 A JP12975079 A JP 12975079A JP S5654020 A JPS5654020 A JP S5654020A
Authority
JP
Japan
Prior art keywords
impedance
compensating
winding
generated
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.)
Granted
Application number
JP12975079A
Other languages
Japanese (ja)
Other versions
JPS6136695B2 (en
Inventor
Haruo Takahashi
Teruhiko Ito
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 JP12975079A priority Critical patent/JPS5654020A/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 JPS5654020A publication Critical patent/JPS5654020A/en
Publication of JPS6136695B2 publication Critical patent/JPS6136695B2/ja
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformers For Measuring Instruments (AREA)

Abstract

PURPOSE:To compensate the errors highly accurate by a method wherein an offset voltage equal to the voltage generated by the secondary leak impedance of two windings of main core is generated at both ends of a compensating impedance in the error compensation type current transformer compensating errors by using an active element. CONSTITUTION:One end of the secondary winding 24 at the main core 21 side is connected at the inversion input side of an operational amplifier 26 through a compensating impedance ZC compensating the secondary leak impedance of the winding 24. The other end of the secondary winding 24 is connected at the noninversion input side of the amplifier 26 while being grounded. Both ends of the secondary winding 25 at the auxiliary core 22 side are connected in parallel with the compensating impedance ZC. Fixed currents are flowed through the impedance ZC, and the offset voltage equal to the voltage generated by the secondary leak impedance of the secondary winding 24 at the main core 21 side is generated at the both ends. Thus, errors due to the leak impedance portion of the winding can be compensated highly accurate.
JP12975079A 1979-03-15 1979-10-08 Error compensation type current transformer Granted JPS5654020A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP12975079A JPS5654020A (en) 1979-10-08 1979-10-08 Error compensation 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
JP12975079A JPS5654020A (en) 1979-10-08 1979-10-08 Error compensation type current transformer

Publications (2)

Publication Number Publication Date
JPS5654020A true JPS5654020A (en) 1981-05-13
JPS6136695B2 JPS6136695B2 (en) 1986-08-20

Family

ID=15017268

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12975079A Granted JPS5654020A (en) 1979-03-15 1979-10-08 Error compensation type current transformer

Country Status (1)

Country Link
JP (1) JPS5654020A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4749940A (en) * 1986-12-22 1988-06-07 General Electric Company Folded bar current sensor
RU2647875C2 (en) * 2016-07-05 2018-03-21 Общество с ограниченной ответственностью научно-производственная фирма "Квазар" Method of compensation of current transformer errors in transient modes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0453979Y2 (en) * 1986-06-30 1992-12-18

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4749940A (en) * 1986-12-22 1988-06-07 General Electric Company Folded bar current sensor
RU2647875C2 (en) * 2016-07-05 2018-03-21 Общество с ограниченной ответственностью научно-производственная фирма "Квазар" Method of compensation of current transformer errors in transient modes

Also Published As

Publication number Publication date
JPS6136695B2 (en) 1986-08-20

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