This International Standard specifies the main characteristics of the supply voltages c traction systems, such as traction fixed installations, including auxiliary devices fed by thi contact line, and rolling stock, for use in the following applications:
- guided mass transport systems such as tramways, elevated and underground railway mountain railways, and trolleybus systems;
- material transportation systems.
This standard does not apply to
- mine traction systems in underground mines;
- cranes, transportable platforms and similar transportation equipment on rails, temporar structures (e.g. exhibition structures) insofar as these are not supplied directly or vi;
transformers from the contact line system and are not endangered by the traction powe supply system;
- suspended cable cars;
- funicular railways.
This standard deals with long term overvoltages as shown in Annex A.