JPS56140263A - Electric current measuring apparatus - Google Patents

Electric current measuring apparatus

Info

Publication number
JPS56140263A
JPS56140263A JP4280680A JP4280680A JPS56140263A JP S56140263 A JPS56140263 A JP S56140263A JP 4280680 A JP4280680 A JP 4280680A JP 4280680 A JP4280680 A JP 4280680A JP S56140263 A JPS56140263 A JP S56140263A
Authority
JP
Japan
Prior art keywords
electric wire
passed
electric current
light
laser
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
JP4280680A
Other languages
Japanese (ja)
Inventor
Nobuaki Kiyokuni
Tatsuo Take
Kazusane Morita
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP4280680A priority Critical patent/JPS56140263A/en
Publication of JPS56140263A publication Critical patent/JPS56140263A/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 Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

PURPOSE:To detect a small quantity of electric current stably without cutting down a measured electric wire by inserting magneto-optical materials into the spacer of an iron coil and by drilling the hole of conducting light in near proximity. CONSTITUTION:The lower part of the circular iron coil where the measured electric wire 24 is passed through is so cut out as the surfaces of the cutting become parallel. The Faradey rotational glass 46 is fixed into this space 44. The drilled holes 48, 50 are dug out horizontally from the surfaces of the cutting of the circular iron coil 40. By arranging Laser equipment 56, Laser is passed through the polarizer 54 to emit straight polarized light. This light passes through an optical fiber 52 and reaches the Faradey rotational glass 46. The polarized surface of laser is rotated by the predetermined angle in accordance with the strength of magnetic field H, that is, the amount of electric current passed through the measured electric wire 42. Rotary polarized baser beam is supplied to the measuring equipment 66 via a polarizer 60, light receiving diode 62, light receiving circuit 64. By this, the distance to the electric wire is always constant. So, the measurement is easy and the accuracy of measurement can be improved.
JP4280680A 1980-04-03 1980-04-03 Electric current measuring apparatus Pending JPS56140263A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4280680A JPS56140263A (en) 1980-04-03 1980-04-03 Electric current measuring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4280680A JPS56140263A (en) 1980-04-03 1980-04-03 Electric current measuring apparatus

Publications (1)

Publication Number Publication Date
JPS56140263A true JPS56140263A (en) 1981-11-02

Family

ID=12646195

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4280680A Pending JPS56140263A (en) 1980-04-03 1980-04-03 Electric current measuring apparatus

Country Status (1)

Country Link
JP (1) JPS56140263A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161661A (en) * 1981-03-31 1982-10-05 Yutaka Ono Measuring device by use of optical fiber
JPS58169903A (en) * 1982-03-30 1983-10-06 Nissin Electric Co Ltd Current transformer
JPS5927266A (en) * 1982-08-05 1984-02-13 Hitachi Cable Ltd Current measuring apparatus using polarization plane-preserving optical fiber
JPS5938663A (en) * 1982-08-27 1984-03-02 Hitachi Cable Ltd Current measuring apparatus using optical fiber
JPS6033060A (en) * 1983-08-02 1985-02-20 Hitachi Ltd Photocurrent probe
EP0327619A1 (en) * 1987-07-22 1989-08-16 Square D Company Electric current sensor using the faraday effect
JPH0255960A (en) * 1988-08-20 1990-02-26 Fujikura Ltd Photoelectric current sensor
WO2023282271A1 (en) * 2021-07-05 2023-01-12 シチズンファインデバイス株式会社 Magnetic field sensor head and magnetic field sensor device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161661A (en) * 1981-03-31 1982-10-05 Yutaka Ono Measuring device by use of optical fiber
JPS58169903A (en) * 1982-03-30 1983-10-06 Nissin Electric Co Ltd Current transformer
JPS5927266A (en) * 1982-08-05 1984-02-13 Hitachi Cable Ltd Current measuring apparatus using polarization plane-preserving optical fiber
JPS5938663A (en) * 1982-08-27 1984-03-02 Hitachi Cable Ltd Current measuring apparatus using optical fiber
JPS6033060A (en) * 1983-08-02 1985-02-20 Hitachi Ltd Photocurrent probe
EP0327619A1 (en) * 1987-07-22 1989-08-16 Square D Company Electric current sensor using the faraday effect
EP0327619A4 (en) * 1987-07-22 1990-06-28 Square D Co Electric current sensor using the faraday effect.
JPH0255960A (en) * 1988-08-20 1990-02-26 Fujikura Ltd Photoelectric current sensor
WO2023282271A1 (en) * 2021-07-05 2023-01-12 シチズンファインデバイス株式会社 Magnetic field sensor head and magnetic field sensor device

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