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
Legislation related to this standard
WITHDRAWN
EN 50123-1:1995
PUBLISHED
EN 50123-1:2003
90.93
Standard confirmed
Sep 14, 2022