Calculation of Internal Electric Fields Induced by Power Frequency Magnetic Fields During Live-Line Working Using Human Models With Realistic Postures

Worker exposure to high-intensity magnetic fields encountered during bare-handed live-line working on a conductor of an overhead transmission line is a major safety concern. In this article, internal (
in situ
) electric fields in a live-line worker induced by power frequency magnetic fields were numerically calculated considering realistic exposure conditions, i.e., different working postures on a conductor bundle of an overhead transmission line. The scalar potential finite difference (SPFD) method was adopted to voxel-based human models with realistic postures to calculate internal electric fields inside the models. The results showed that the internal electric fields were far below the basic restriction for occupational exposure stipulated in the International Commission on Nonionizing Radiation Protection guidelines even when the maximum magnetic field exceeded the reference level in the guidelines.