IEC 60071-2:20 18 RLV包含国际标准及其红线版本。红线版本只有英文版本。Redline版本为您提供了一种快速简单的方法来比较该标准与其前一版本之间的所有变化。红线版本不是IEC官方标准，只有标准的当前版本才被视为官方文件。 ？ IEC 60071-2:20 18构成了应用指南，涉及三相电气系统设备或装置绝缘等级的选择。它为IEC 60071-1范围I和II的额定耐压的确定提供了指导，并证明了这些额定值与设备标准化最高电压的相关性。它涵盖了三个-标称电压高于1 kV的相系统。根据IEC指南108，它具有水平标准的地位。与上一版相比，此版本包括以下重大技术变更: a)由于IEC 60071-1中的附件重叠，删除了关于空气间隙以确保规定的冲击耐受电压安装的附件； b)更新了关于电涌放电器的4.2和4.3； c）修订了4.3.5关于极快前沿过电压。增加了关于特高压变电站极快前沿过电压绝缘配合的附录J； d)增加了关于大气校正-高度校正的附件H。 e)增加了非标准雷电过电压形态评定方法附件一。

IEC 60071-2:2018 RLV contains the International Standard and its Redline version. The Redline version is available in English only. The Redline version provides you with a quick and easy way to compare all the changes between this standard and its previous edition. The Redline version is not an official IEC Standard, only the current version of the standard is to be considered the official document.
？ IEC 60071-2:2018 constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase electrical systems. It gives guidance for the determination of the rated withstand voltages for ranges I and II of IEC 60071-1 and to justify the association of these rated values with the standardized highest voltages for equipment. It covers three-phase systems with nominal voltages above 1 kV. It has the status of a horizontal standard in accordance with IEC Guide 108. This edition includes the following significant technical changes with respect to the previous edition:
a) the annex on clearance in air to assure a specified impulse withstand voltage installation is deleted because the annex in IEC 60071-1 is overlapped;
b) 4.2 and 4.3 on surge arresters are updated;
c) 4.3.5 on very-fast-front overvoltages is revised. Annex J on insulation co-ordination for very-fast-front overvoltages in UHV substations is added;
d) Annex H on atmospheric correction – altitude correction is added.
e) Annex I on evaluation method of non-standard lightning overvoltage shape is added.