Calculation model to evaluate effects of lightning protection measures on railway signalling equipment

The development of the effective and economical protection measures is very important for the railway signalling systems because the lightning damages cause the disruption of the railway transportation systems. The authors have conducted the field tests to investigate the surge parameters along the rails and proposed a calculation model of surge propagation characteristics along the rails. In this paper, we propose a calculation model for lightning overvoltages on the railway level crossing system as typical railway signalling equipment. Moreover, this paper indicates the evaluation results of lightning protection effects by using the calculation model.