Abstract
Jakarta and surrounding area such as Manggarai, Bogor, Depok, Tanggerang and Bekasi located in the area which has a high lightning density and connected by electric railway system which are transporting more than than 600 thousands people a year. Disturbances on the railway system caused by lightning strike has made a lot of damaged on the equipments of Electric Railway System of Indonesis (KAI) and caused shutdown on this transportation system. Most of disturbance are caused by induced overvoltage coming from 1.5 kV DC overhead contact lines (OHCL) and near by telecommunication tower hit by lightning that damaged the railway signalling system. Since year 2013 improvement are carried out for lightning protection and grounding system at the overhead contact lines and lightning protection system for the telecommunication tower and signalling system. The lightning protection system has greatly improves the performance of equipments and facilities and minimizing the cost of lightning damages.
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