I.S. EN 50122-1:2011

National Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Contact line zone and current collector zone
5 Protective provisions against direct contact
6 Protective provisions against indirect contact and
   impermissible rail potential
7 Protective provisions for low voltage non traction
   power supplies
8 Protective provisions where track systems, which are
   utilized for carrying traction return current, or/and
   contact line systems pass through hazardous zones
9 Limits for touch voltage and protection against the
   danger of rail potential
10 Additional protective provisions
Annex A (informative) - Typical obstacles
Annex B (normative) - Warning sign
Annex C (informative) - Guiding values for rail potential
        gradient
Annex D (informative) - Effective touch voltage and body
        voltage with respect to the body current
Annex E (normative) - Measurement methods for effective
        touch voltages
Annex F (normative) - The use of voltage-limiting devices
Annex G (normative) - Special national conditions
Annex ZZ (informative) - Relationship between this European
         Standard and the Essential Requirements
         of EU Directive 2008/57/EC
Bibliography

Defines requirements for the protective provisions relating to electrical safety in fixed installations associated with a.c. and/or d.c. traction systems and to any installations that can be endangered by the traction power supply system.