GB539904A - An improved method and apparatus for estimating electric current in conductors - Google Patents

An improved method and apparatus for estimating electric current in conductors

Info

Publication number
GB539904A
GB539904A GB910840A GB910840A GB539904A GB 539904 A GB539904 A GB 539904A GB 910840 A GB910840 A GB 910840A GB 910840 A GB910840 A GB 910840A GB 539904 A GB539904 A GB 539904A
Authority
GB
United Kingdom
Prior art keywords
sheath
conductors
electric current
spikes
improved method
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.)
Expired
Application number
GB910840A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB910840A priority Critical patent/GB539904A/en
Publication of GB539904A publication Critical patent/GB539904A/en
Expired 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
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers

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

539,904. Current measurements. MARCHANT. E. W. May 23, 1940, No. 9108. [Class 37] The strength of an alternating current flowing in a conductor 1, which may have a non-magnetic metal sheath 2, but otherwise has such a sheath, Fig. 3 (not shown), temporarily applied to it, is measured by measuring the voltage induced in the sheath by Foucault currents by means of a voltmeter 6, which may be calibrated in amperes, between two fixed points whereat spikes 5 are applied, the spikes being insulatingly carried in a magnetic screen 3 preventing direct influence of the conductor-current on the meter circuit. The screen 3 may be only part cylindrical and support the meter, a handle being attached, or may be in the form of co-operating half-sleeves bolted together, Figs. 2 and 3, respectively (not shown).
GB910840A 1940-05-23 1940-05-23 An improved method and apparatus for estimating electric current in conductors Expired GB539904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB910840A GB539904A (en) 1940-05-23 1940-05-23 An improved method and apparatus for estimating electric current in conductors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB910840A GB539904A (en) 1940-05-23 1940-05-23 An improved method and apparatus for estimating electric current in conductors

Publications (1)

Publication Number Publication Date
GB539904A true GB539904A (en) 1941-09-29

Family

ID=9865510

Family Applications (1)

Application Number Title Priority Date Filing Date
GB910840A Expired GB539904A (en) 1940-05-23 1940-05-23 An improved method and apparatus for estimating electric current in conductors

Country Status (1)

Country Link
GB (1) GB539904A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333711A1 (en) * 1986-07-14 1989-09-27 MILLER, John S. Sr. Current detection device having an extended frequency range of response
WO1994010579A1 (en) * 1992-11-05 1994-05-11 N.V. Kema Method and apparatus for measuring partial discharges in cables

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0333711A1 (en) * 1986-07-14 1989-09-27 MILLER, John S. Sr. Current detection device having an extended frequency range of response
EP0333711A4 (en) * 1986-07-14 1990-01-08 Miller John S Sr Current detection device having an extended frequency range of response.
WO1994010579A1 (en) * 1992-11-05 1994-05-11 N.V. Kema Method and apparatus for measuring partial discharges in cables
US5767684A (en) * 1992-11-05 1998-06-16 N.V. Kema Method and apparatus for measuring partial discharges in cables

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