EVS-EN 50463-1:2017

This European Standard describes the primary purpose of the EMS, which is to meter energy consumption for billing and provide compiled energy billing data (CEBD) to a DCS. The EMS may also be used for other functions such as energy management. In addition, this European Standard also describes the primary purpose of a DCS and its interactions with an EMS and settlement system.
This part of EN 50463:
-  gives requirements for the complete Energy Measurement System and also requirements for all devices implementing one or more functions of the Energy Measurement System;
-  applies to newly manufactured Energy Measurement Systems for use on board railway traction units, powered by AC. and/or DC. supply voltages as listed in EN 50163;
-  does not apply to portable Energy Measurement Systems.