Detection of DC Current and Three—Phase Ground Fault Current Using a Ferromagnetic Pipe

M. Yamaguchi, A. Hayasaka, K. Murakami, H. Hojo

Research output: Contribution to journalArticle

Abstract

New methods for detecting DC current and ground fault current in a three-phase power line system are described. Two detectors both utilize the skin effect of conducting current in a ferromagnetic pipe. The detectors have no windings. The DC current detector outputs almost sinusoidal voltage whose amplitude corresponds well to the DC current. The detector has a simplified circuit configuration and short response time. There are no contacts between the DC line and the sense circuit. The ground fault detector breaks down the three-phase power line within three drive-frequency cycles, This paper summarizes those results.

Original languageEnglish
Pages (from-to)456-463
Number of pages8
JournalIEEE Translation Journal on Magnetics in Japan
Volume4
Issue number7
DOIs
Publication statusPublished - 1989 Jul

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Engineering(all)

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