Estimation of Lightning Overvoltage in Signalling Equipment on Electrified Railways

抄録

Railway signalling systems have been damaged by lightning. Therefore, effective and economical lightning protection measures are necessary for railway signalling systems. To analyze lightning risk and study countermeasures against lightning damage, the authors therefore observed lightning overvoltage in electrified railway signal cables, electrical power lines and rails. Based on the result of these observations, the correlation between lightning overvoltage and lightning conditions was clarified, a methodology for estimating the probability of lightning hazards occurring was proposed, and it was found that according to statistics, there was no significant variation in overvoltage observed between electrified and non-electrified sections of railway.