JPS5735760A - Current measuring device - Google Patents

Current measuring device

Info

Publication number
JPS5735760A
JPS5735760A JP11258580A JP11258580A JPS5735760A JP S5735760 A JPS5735760 A JP S5735760A JP 11258580 A JP11258580 A JP 11258580A JP 11258580 A JP11258580 A JP 11258580A JP S5735760 A JPS5735760 A JP S5735760A
Authority
JP
Japan
Prior art keywords
current
wavelength
different
filter
kinds
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
JP11258580A
Other languages
Japanese (ja)
Inventor
Tetsuo Taniuchi
Osamu Kamata
Yoshinobu Tsujimoto
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 Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11258580A priority Critical patent/JPS5735760A/en
Publication of JPS5735760A publication Critical patent/JPS5735760A/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
    • G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
    • G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
    • G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Magnetic Variables (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE:To measure current over a wide range at high accuracy by detecting Faraday amount of rotation using two or more rays different in wavelength. CONSTITUTION:Two kinds of magnetooptic bodies 6, 7 different in Verdet constant are put in layers near a wire in which current to be measrued is flowing through a wavelength separation filter 9, and an optical body 21 provided with a mirror 8 is placed on the back side. Two kinds of laser beams 10', 11' different in wavelength are composed by a filter 12 and passed through the optic body 21. Then, it is resolved by a filter 13 and the amount of rotation of polarization is detected by polarization prisms 14, 15 and light receivers 16, 17. By this way, domains of small current and large current can be measured independently, and accurate measurement of current of each domain is made possible.
JP11258580A 1980-08-14 1980-08-14 Current measuring device Pending JPS5735760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11258580A JPS5735760A (en) 1980-08-14 1980-08-14 Current measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11258580A JPS5735760A (en) 1980-08-14 1980-08-14 Current measuring device

Publications (1)

Publication Number Publication Date
JPS5735760A true JPS5735760A (en) 1982-02-26

Family

ID=14590405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11258580A Pending JPS5735760A (en) 1980-08-14 1980-08-14 Current measuring device

Country Status (1)

Country Link
JP (1) JPS5735760A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5839953A (en) * 1981-09-02 1983-03-08 Tokyo Electric Power Co Inc:The Measuring apparatus of electric current
JPS60213875A (en) * 1984-04-07 1985-10-26 Sumitomo Electric Ind Ltd Light-applied magnetic field sensor
JPS6126875A (en) * 1984-07-17 1986-02-06 Toshiba Corp Measuring device for magnetic field
AU671269B2 (en) * 1992-01-29 1996-08-22 Instrument Transformers Limited Electric current measurement
WO2008065196A3 (en) * 2006-11-30 2008-12-11 North Sensor As Faraday effect current sensor
EP2919022A3 (en) * 2007-11-30 2015-10-21 PowerSense A/S Sensor assembly and method for measuring strokes of lightning

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5839953A (en) * 1981-09-02 1983-03-08 Tokyo Electric Power Co Inc:The Measuring apparatus of electric current
JPS60213875A (en) * 1984-04-07 1985-10-26 Sumitomo Electric Ind Ltd Light-applied magnetic field sensor
JPS6126875A (en) * 1984-07-17 1986-02-06 Toshiba Corp Measuring device for magnetic field
AU671269B2 (en) * 1992-01-29 1996-08-22 Instrument Transformers Limited Electric current measurement
WO2008065196A3 (en) * 2006-11-30 2008-12-11 North Sensor As Faraday effect current sensor
US8692539B2 (en) 2006-11-30 2014-04-08 Powersense A/S Faraday effect current sensor
EP2919022A3 (en) * 2007-11-30 2015-10-21 PowerSense A/S Sensor assembly and method for measuring strokes of lightning

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