IEC 60850:2014 pdf download,Railway applications – Supply voltages of traction systems.

IEC 60850:2014 “Railway applications – Supply voltages of traction systems” specifies the main characteristics of traction system supply voltages used by railway and guided transport applications. It covers traction fixed installations, including auxiliary devices fed from the contact line, as well as the rolling stock that operates with those voltages. The standard is applicable not only to conventional railways, but also to guided mass transport systems such as trams, light rail, elevated and underground railways, and trolleybus systems. It can also be applied to rail-bound material transportation systems (for example, for coal or iron ore). In addition, it applies to low-speed maglev trains and linear motor transport systems.

The document’s role is to harmonize key electrical parameters and ensure that traction power supply characteristics are defined consistently. This supports compatibility, design choices, and safe operation across infrastructure and vehicles. It also documents significant technical updates compared with the previous edition, including clarified definitions in Clause 3, completion of Subclause 4.1, modifications to Table 1, and updates to Annex B with a new Table B.1.