IEC 62586-2:20 17（E）规定了仪器的功能测试和不确定度要求，这些仪器的功能包括测量、记录和可能监控供电系统中的电能质量参数，其测量方法（A类或S类）在IEC 61000-4-30中定义。 本文件适用于符合IEC 62586-1的电能质量仪表。 根据IEC 61000-4-30指定嵌入A类或S类电能质量功能的设备的其他产品标准（如数字故障记录器、收入表、中压或高压保护继电器）也可参考本文件。 这些要求适用于50 Hz或60 Hz的单相、双相（分相）和三相交流电源系统。 这第二版取消并取代了2013年出版的第一版。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: -增加了RVC和电流的测试程序； -错误已修复。

IEC 62586-2:2017(E) specifies functional tests and uncertainty requirements for instruments whose functions include measuring, recording, and possibly monitoring power quality parameters in power supply systems, and whose measuring methods (class A or class S) are defined in IEC 61000-4-30.
This document applies to power quality instruments complying with IEC 62586-1.
This document can also be referred to by other product standards (e.g. digital fault recorders, revenue meters, MV or HV protection relays) specifying devices embedding class A or class S power quality functions according to IEC 61000-4-30.
These requirements are applicable in single-, dual- (split phase) and 3-phase AC power supply systems at 50 Hz or 60 Hz.
This second edition cancels and replaces the first edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- test procedures for RVC and current have been added;
- mistakes have been fixed.