Analysis of lightning-induced impulse magnetic fields in the building with an insulated down conductor

Ya Ping Du, Qi Bin Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


This paper presents an analysis of lightning-induced magnetic fields in a building. The building of concern is protected by the lightning protection system with an insulated down conductor. In this paper a system model for metallic structure of the building is constructed first using the circuit approach. The circuit model of the insulated down conductor is discussed extensively, and explicit expressions of the circuit parameters are presented. The system model was verified experimentally in the laboratory. The modeling approach is applied to analyze the impulse magnetic fields in a full-scale building during a direct lightning strike. It is found that the impulse magnetic field is significantly high near the down conductor. The field is attenuated if the down conductor is moved to a column in the building. The field can be reduced further if the down conductor is housed in an earthed metal pipe. Recommendations for protecting critical equipment against lightning-induced magnetic fields are also provided in the paper.
Original languageEnglish
Pages (from-to)71-77
Number of pages7
JournalIEEJ Transactions on Fundamentals and Materials
Issue number2
Publication statusPublished - 14 Feb 2006


  • Building
  • Coaxial cable
  • Impulse magnetic field
  • Lightning protection system

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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