IEC？62888-2:20 18规定了适用于能量测量系统（EMS）的能量测量功能（EMF）的要求，该能量测量系统（EMS）用于车载牵引装置，用于测量直接从接触线系统供应的能量。本文件还给出了电流测量功能（如电流传感器）、电压测量功能（如电压传感器）和能量计算功能（如电能表）的要求。

IEC？62888-2:2018 specifies the requirements applicable to the Energy Measurement Function (EMF) of an Energy Measurement System (EMS) for use on board traction units for measurement of energy supplied directly from/to the Contact Line system. This document also gives requirements for the Current Measurement Function (e.g. current sensor), the Voltage Measurement Function (e.g. voltage sensor) and the Energy Calculation Function (e.g. energy meter).