Lightning discharges and discharges from overhead power lines with human burn injuries as consequences

Abstract

Discharges from overhead power lines and lightning discharges may severely endanger human life and health. If non-lethal, burn injuries may also last for a lifetime, so as Lichtenberg figures caused by lightning discharges. Some accidents with burns are discussed in this paper and recommendations given for safety reasons. Specific energy transferred by typical lightning strokes currents given in the standard IEC 62305 is calculated. The aim of the paper is to suggest a simple expression for the estimation of safe approach distances to overhead lines, especially if high temperatures and changes in terrain reduced the secure height above ground, or if carrying elevated objects. Results of these calculations are compared to safe approach distances given in regulations of different countries. Safe distances from railway power lines are also considered.nema