本文件规定了电动道路车辆与外部电路导电连接的电气安全要求。外部电路包括外部电源和外部电力负载。本文件提供了IEC 61851-1中定义的充电模式2、3、4和反向功率传输的要求。对于模式4，本文件根据IEC 61851-23提供了与隔离直流电动汽车充电站连接相关的要求。 注1:本版本不提供模式1的要求。 注2:外部电路不是车辆的一部分。 本文件适用于车辆电源电路的车载部分。它还适用于用于将车辆连接到外部电路的专用电源控制功能。 它没有为制造、维护和维修人员提供全面的安全信息。 注3:ISO 6469-3提供了电动道路车辆的一般电气安全要求。 注4:在本文件的本版本中，当车辆与外部电路有导电直流连接时，在单一故障条件下，用于防止电击的y电容限制不再适用于故障保护规定。

This document specifies electric safety requirements for conductive connection of electrically propelled road vehicles to external electric circuits. External electric circuits include external electric power supplies and external electric loads. This document provides requirements for the charging modes 2, 3, 4, as defined in IEC 61851-1, and reverse power transfer. For mode 4, this document provides requirements regarding the connection to an isolated DC EV charging station according to IEC 61851-23. NOTE 1 This edition does not provide requirements for mode 1. NOTE 2 External electric circuits are not part of the vehicle. This document applies to the on-board sections of vehicle power supply circuits. It applies also to dedicated power supply control functions used for the connection of the vehicle to an external electric circuit. It does not provide comprehensive safety information for manufacturing, maintenance and repair personnel. NOTE 3 ISO 6469-3 provides general electrical safety requirements for electrically propelled road vehicles. NOTE 4 With this edition of this document the limitation of y-capacitance for protection against electric shock under single failure conditions is no longer applicable as a fault protection provision when the vehicle has a conductive DC connection to an external electric circuit.