Magnetic fields around heavy-current-carrying multi-core cables I. Theoretical model

Zheng Cai Fu, Ya Ping Du, J. Burnett

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)


For understanding and evaluation of such ELF magnetic fields, current-carrying parallel-helix-filament theoretical model was proposed. Based on the model, theoretical and simplified formulas for calculating the magnetic fields were deduced. The patterns of the magnetic fields are disclosed. It is found that the magnetic field decay with the radial distance at rate greater than exponentially. On an observation path parallel to the cable axis, or on a coaxial circular path, both the magnitude and the phase angle of the magnetic field change with the observation position periodically. The magnetic fields around some cables predicted by the proposed simplified formulas were compared with the limits in some international standards. It is found that for most of the cables employed in engineering practices, in the space of 2 meters away from the cable, the magnetic fields are in compliance with the standards.
Original languageEnglish
Pages (from-to)237-242
Number of pages6
JournalShanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University
Issue number2
Publication statusPublished - 1 Feb 2002
Externally publishedYes


  • Electromagnetic compatibility
  • Extremely low frequency (ELF) magnetic field
  • Low voltage distribution system
  • Multi-core power cable

ASJC Scopus subject areas

  • General


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