Abstract
Experiments on the lightning-induced voltage on an overhead wire with a simulated lightning channel have been carried out outdoors. They have advantages because uncertainties of the parameters related to the lightning channel are greatly reduced, and repeated measurements are possible.
In this paper, the influence of the electrical characteristics of the ground on the lightning-induced voltage on an overhead wire, associated with a vertical return stroke channel, is studied with a 1/20 reduced-scale model, together with the influence of the termination of the wire. The conductivity and relative permittivity of the ground are evaluated by the coincidence of the measured horizontal electric field with that calculated from the current on the simulated lightning channel.
Irrespective of the termination of an overhead wire, measurements verify calculated results based on the theory where the inducing sources of the voltages are looked upon as tangential components of electric fields to the wire.
