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BS EN 50123-1-2003
Bahnanwendungen. Ortsfeste Anlagen. Gleichstrom-Schalteinrichtungen. Allgemeines Railway applications Fixed installations D.C. switchgear Part 1:General Applications ferroviaires. Installations fixes. Appareillage a courant continu. Generalites
适用范围：The EN 50123 series specifies requirements for d.c. switchgear and controlgear and is intended to be used in fixed electrical installations with nominal voltage not exceeding 3 000 V d.c, which supply electrical power to vehicles for public guided transport, i.e. railway vehicles, tramway vehicles, underground vehicles and trolley-buses. Part 1 specifies general requirements. The other parts are covering Part 2 D.C. circuit breakers, Part 3 Indoor d.c. disconnectors, switch-disconnectors and earthing switches, Part 4 Outdoor d.c. disconnectors, switch-disconnectors and earthing switches, Part 5 Surge arresters and low voltage limiters for specific use in d.c. systems, Part 6 D.C. switchgear assemblies, Part 7-1 Measurement, control and protection devices for specific use in d.c. traction systems -Application guide, Part 7-2 Measurement, control and protection devices for specific use in d.c. traction systems -Isolating current transducers and other current measuring devices, Part 7-3 Measurement, control and protection devices for specific use in d.c. traction systems -Isolating voltage transducers and other voltage measuring devices
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