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BSI BS EN 50122-1:2022+A1:2025

Fixed installations for railway applications. Electrical safety, earthing and the return circuit -- Protective provisions against electric shock
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BSI BS EN 50122-1:2022+A1:2025

Fixed installations for railway applications. Electrical safety, earthing and the return circuit -- Protective provisions against electric shock

PUBLISH DATE 2025
PAGES 114
BSI BS EN 50122-1:2022+A1:2025
This document specifies requirements for the protective provisions relating to electrical safety in fixed installations associated with AC and/or DC traction systems and to any installations that can be endangered by the electric traction power supply system. This also includes requirements applicable to vehicles on electrified lines. It also applies to all aspects of fixed installations which are necessary to ensure electrical safety during maintenance work within electric traction power supply systems. This document applies to new electric traction power supply systems and major revisions to electric traction power supply systems for: a) railways; b) guided mass transport systems such as 1) tramways, 2) elevated and underground railways, 3) mountain railways, 4) trolleybus systems, 5) electric traction power supply systems for road vehicles, which use an overhead contact line system, and 6) magnetically levitated systems, which use a contact line system; c) material transportation systems. This document does not apply to: a) electric traction power supply systems in underground mines, b) cranes, transportable platforms and similar transportation equipment on rails, temporary structures (e.g. exhibition structures) in so far as these are not supplied directly or via transformers from the contact line system and are not endangered by the electric traction power supply system, c) suspended cable cars, d) funicular railways, e) existing vehicles. This document does not specify working rules for maintenance. The requirements within this document related to protection against electric shock are applicable to persons only.
SDO BSI: British Standards Institution
Document Number EN 50122-1
Publication Date Aug. 6, 2025
Language en - English
Page Count 114
Revision Level 1
Supercedes
Committee GEL/9/3
Publish Date Document Id Type View
Nov. 3, 2022 BS EN 50122-1:2022 Revision
May 31, 2011 BS EN 50122-1:2011 Revision
May 15, 1998 BS EN 50122-1:1998 Revision
Aug. 6, 2025 BS EN 50122-1:2022+A1:2025 Consolidated
Nov. 3, 2022 BS EN 50122-1:2022 Consolidated
Feb. 28, 2017 BS EN 50122-1:2011+A4:2017 Consolidated
Feb. 1, 2017 BS EN 50122-1:2011:2017 Consolidated
July 1, 2011 BS EN 50122-1:2011:2011 Consolidated
Jan. 31, 2008 BS EN 50122-1:1998 Consolidated