The current version, , covers several vital parameters to ensure safety and interoperability: IEC 60850 - iTeh Standards
The standard, titled "Railway applications - Supply voltages of traction systems," is a critical international document published by the International Electrotechnical Commission (IEC) . It defines the main characteristics and parameters for electrical supply systems used in various railway transport applications. Where to Find IEC 60850 iec 60850 pdf free download link
The standard applies to traction fixed installations, rolling stock, and auxiliary devices across a wide range of systems: Both passenger and freight lines. The current version, , covers several vital parameters
The full document is available for purchase and download at the IEC Webstore. The current version
This includes tramways, light rail, trolleybuses, and underground/elevated railways.