本文件规定了两轮电动助力自行车（以下简称EPAC）、完全组装的EPAC和子组件的设计、标记、组装和测试的安全和性能要求，并为制造商提供的信息提供了指南（即此类EPAC的使用和保养说明）。 本文件适用于最大鞍座高度为635 mm或以上且拟用于私人和商业用途的两轮EPAC，但拟从无人值守车站租用的EPAC除外。 本文件旨在涵盖EPACs第5.3条中列出的所有常见重大危险、危险情况和事件，如按预期使用或在制造商可合理预见的误用条件下使用。 本文件规定了发动机电源管理系统、电路（包括充电器）的要求和试验方法，用于评估安全超低电压（SELV）最大电压高达60 V d.c.的系统的EPAC和子组件的设计和组装，包括公差。

This document specifies safety and performance requirements for the design, marking, assembly, and testing of two wheeled electrically power assisted cycles (hereafter EPACs), fully-assembled EPACs and subassemblies, and provides guidelines for information supplied by the manufacturers (i.e. instructions on the use and care of such EPACs). This document applies to two wheeled EPACs that have a maximum saddle height of 635 mm or more and are intended for private and commercial use with exception of EPACs intended for hire from unattended stations. This document is intended to cover all common significant hazards, hazardous situations and events listed in 5.3 of EPACs, when used as intended or under conditions of misuse that are reasonably foreseeable by the manufacturer. This document specifies requirements and test methods for engine power management systems, electrical circuits including the charger for the assessment of the design and assembly of EPACs and sub-assemblies for systems having a Safety Extra Low Voltage (SELV) maximum voltage up to 60 V d.c. including tolerances.