Lightning Protection System for Light Rail Transit Case on Palembang, Indonesia

Palembang Light Rail Transit System (LRT) is a transportation system that carries passengers from Sultan Mahmud Badaruddin II Airport to OPI. The entire LRT track is 23.5 km, which is 12-17 meters above ground level. Meanwhile, Palembang has a fairly high lightning density, where the monsoon wind comes from the north during the rainy season. LRT Palembang is also located along the equatorial line and has the characteristics of tropical lightning. Lightning Flash Density (Lightning Flash Density) in Palembang reaches 10-15 srokes / km2 / year. With that condition, rolling stock becomes an easy target for lightning strikes. Improper application of lightning protection systems can cause the damages to the Light Rail Transit System. Analysis of lightning protection systems to be applied in Indonesia, especially in Palembang area, is carried out to avoid the future damages. The analysis is done by using rolling ball method. The result is the use of the Extended Mast Terminal or Free Standing Mast System with the Early Streamer Emission air terminal, Double Shielded Down Conductor as the Down Conductor, and integrated grounding. For the improvement of Lightning Protection System, the use of foundation grounding and overhead ground wire is recommended.