EN 50122-1:1997

This standard specifies requirements for the protective provisions relating to electrical safety in fixed installations associated with a.c.-and d.c.-traction systems and to any installations that may be endangered by the traction power supply system It also applies to all fixed installations that are necessary to ensure electrical safety during maintenance work within electric traction systems Note: other provisions may be required to protect work sites for maintenance purposes which are not included in this standard This standard applies to all new lines and to all major revisions to existing lines for electric traction systems described in the standard