IEC TS 62257-4:20 15(E)提供了一种描述电气化系统将实现的结果的方法，该结果独立于可以实施的技术解决方案。目的是提供一种方法来帮助项目承包商和项目开发商选择和设计孤立站点的电气化系统，同时满足已确定的需求，例如IEC TS 62257-2中描述的需求。与上一版相比，主要技术变化如下: -将最大AC电压从500V重新定义为1000V，将最大DC电压从750V重新定义为1500V； -取消100千伏安系统规模的限制。 本出版物应与IEC 62257系列一起阅读。

IEC TS 62257-4:2015(E) provides a method for describing the results to be achieved by the electrification system independently of the technical solutions that could be implemented. The purpose is to provide a method to assist project contractors and project developers to select and design the electrification system for isolated sites while matching the identified needs, such as those described in IEC TS 62257-2. The main technical changes with regard to the previous edition are as follows:
- redefine the maximum AC voltage from 500 V to 1 000 V, the maximum DC voltage from 750 V to 1 500 V;
- removal of the limitation of 100 kVA system size.

This publication is to be read in conjunction with IEC 62257 series.