Earthing
Lightning Protection and Grounding of Railway Systems
What is the importance of lightning protection and grounding in railway systems? Learn effective methods and practices for safe transportation!
\n \n \n Sector Solutions · 07\n
\nRail Systems
\nLightning protection, earthing and surge protection for stations, tunnels and line structures on metro, tram and railway routes.
\n\n \n 25 reference projects\n
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\nThe protection need
\nOn a rail line, protection does not end at the roof of a single building. Stations, tunnels, viaducts, depots and traction buildings operate along the same route, and signalling and communications depend on that chain. In passenger areas, life safety comes first. On the exposed sections of the line, lightning more often enters through the signalling and communications cables than through the power cable. Vibration and moisture also loosen connections over time. We therefore treat air termination, earthing, equipotential bonding and surge protection as one system for the whole line, not as separate packages.
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\n Principal risks and design criteria
- 01
Open line and structures
Viaducts, tunnel mouths, depots and tall station volumes stay exposed to lightning. The air-termination arrangement follows the geometry of the structure.
- 02
Signalling and communications
A surge that affects the service is more likely to arrive on a signalling or communications cable than on the power line. Those circuits are protected separately.
- 03
Crowded stations
If the platform, the steelwork, the cable tray and the earthing are not at the same potential, a touch voltage appears.
- 04
Permanent connections
The line vibrates and gets wet. A mechanical clamp can loosen over time; the joint has to stay low-resistance.
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\n Solution components
- Lightning Protection SystemsExternal and internal protection for stations, depots and line structures
- Earthing SystemsRing and foundation earthing, and equipotential bonding
- Exothermic Welding SystemsPermanent joints on lines subject to vibration
- Surge Protection SystemsFor signalling, communications and power lines
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\n References in this field
- MetroAltunizade - Bosna Bulvarı Metro ProjesiTurkey / İstanbul
- MetroAtaköy - İkitelli Metro HattıTurkey / İstanbul
- MetroBakırköy İDO - Kirazlı Metro HattıTurkey / İstanbul
- MetroÇekmeköy - Sancaktepe – Sultanbeyli Metro HattıTurkey / İstanbul
- MetroDudullu - Bostancı Metro HattıTurkey / İstanbul
- MetroGayrettepe - Yeni Havalimanı Metro HattıTurkey / İstanbul
- MetroHalkalı - Yeni Havalimanı Metro HattıTurkey / İstanbul
- MetroKabataş - Mecidiyeköy – Mahmutbey Metro HattıTurkey / İstanbul
- MetroKadıköy - Kartal Metro HattıTurkey / İstanbul
- MetroLevent - Hacıosman Metro HattıTurkey / İstanbul
- MetroLevent - Hisarüstü Metro HattıTurkey / İstanbul
- MetroLevent - Zincirlikuyu Metro HattıTurkey / İstanbul
- MetroSabiha Gökçen Havalimanı – Tavşantepe Metro HattıTurkey / İstanbul
- MetroÜmraniye - Üsküdar Metro HattıTurkey / İstanbul
- MetroGebze - Darıca Metro HattıTurkey / Kocaeli
- Rail systemAntalya Faz III Raylı Sistem HattıTurkey / Antalya
- TramAlibeyköy - Eminönü Tramvay HattıTurkey / İstanbul
- TramKocaeli Sekapark - Otogar Tramvay HattıTurkey / Kocaeli
- High-speed railAnkara - İzmir Hızlı Tren HattıTurkey
- High-speed railGebze - Halkalı Hızlı Tren HattıTurkey
- High-speed railİstanbul – Ankara Hızlı Tren HattıTurkey
- RailwayMarmaray HattıTurkey / İstanbul
- StationEskişehir Gar ProjesiTurkey / Eskişehir
- RailwayTanzanya Darüsselam – Morogoro Demiryolu ProjesiTanzania
- RailwayTanzanya Morogoro – Makutupora Demiryolu ProjesiTanzania
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