LIGHTNING PROTECTION SYSTEM FOR LIGHT RAIL TRANSIT CASE STUDY: PALEMBANG LIGHT RAIL TRANSIT

• Main Author: DENOV - NIM: 23217065, BRYAN
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26160
• Institution: Institut Teknologi Bandung

<p align="justify">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. <br /> <br /> <br /> With that condition, rolling stock becomes an easy target for lightning strikes. In some viaduct sites, there are BTS towers and other high structures in the vicinity making them susceptible to indirect lightning strikes. This can certainly endanger passengers and equipment on the LRT system. Therefore, an appropriate lightning protection system is needed to be applied to the LRT system of Palembang. <br /> <br /> <br /> 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 having a greater coverage area than conventional air terminals. Down conductor used is double shielded down and single shielded Aluminum tape. The grounding system used is grounding grid, with grounding viaduct performed every pier and connected to ground grid. This is because at the development stage of the LRT system does not consider the foundation grounding which is the best lightning grounding at this moment, so it is necessary to add down the conductor to the grounding system. Then, along the viaduct there is still a risk of direct strain that may harm equipment and humans, so that along the viaduct it is advisable to use overhead ground wire to improve the reliability of the lightning protection system. <br /> <p align="justify">