本文件旨在收集信息和报告经验，以便为电压水平和相关方面（电能质量、EMC、测量？）的标准化提出建议对于LVDC系统（电压水平低于1500 V直流电的系统）。 给出了建议电压值的基本原理。定义了电压（电能质量）参数的变化及其边界建议。尽管如此，本文件并未对一些技术项目进行详尽解释，并为未来的工作确定了一些差距。购买本文件时可获得的所有当前修订均包含在购买本文件中。

The purpose of this document is to collect information and report experience in order to make recommendations for the standardization of voltage levels and related aspects (power quality, EMC, measurement?) for LVDC systems (systems with voltage level lower than 1 500 V d.c.). Rationale for the proposed voltage values are given. Variation of parameters for the voltage (power quality) and recommendation for their boundaries are defined. Nevertheless, some of the technical items are not exhaustively explained in this document and some gaps are identified for future work.All current amendments available at time of purchase are included with the purchase of this document.