新的！IEC 60071-2:20 18作为IEC 60071-2:20 18 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 60071-2:20 18构成应用指南，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。它涵盖了标称电压在1 kV以上的三相系统。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。

NEW!IEC 60071-2:2018 is available as IEC 60071-2:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

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.