www.hirschmann.com 1 Fieldbus net in the Lötschberg tunnel. Fail safe transmission of protection and obstruction signals in the Lötschberg base tunnel with optical field buses. Tunnels / Bridges A milestone in the extension of the European high speed train network was the commissioning of the Lötschberg base tunnel in 2007. The trains travel at up to 250 km/h through the first high power tunnel under the Alps. In total 36 IC / EC trains

Join for free to read