IEC TS 60721-4-3:20 23 IEC 60721的这一部分涉及IEC 60721-3-3中给出的条件与IEC 60068-2中定义的环境测试程序的相关性和转换。 本文件为IEC 60721-3-3中规定的产品类别提供了在固定防风雨场所运行的电工设备的测试程序和测试严重性。 本第一版取消并取代IEC TR 60721-4-3:20 01和IEC TR 60721-4-3:20 01/AMD 1:20 03。本版构成技术修订版。 本版本包括以下与IEC TR 60721-4-3:20 01和IEC TR 60721-4-3:20 01/AMD1:2003相关的重大技术变更: a)文件已完全重做； b)除附件A中的数字外，所有数字均已删除； c)严重性已与IEC 60721-3-3:20 19的严重性一致。

IEC TS 60721-4-3:2023 This part of IEC 60721 deals with the correlation and transformation of the conditions given in IEC 60721-3-3 to the environmental test procedures defined in IEC 60068-2.
This document provides test procedures and test severities for electrotechnical equipment operated at stationary weatherprotected locations for the product classes set out in IEC 60721-3-3.
This first edition cancels and replaces IEC TR 60721-4-3:2001 and IEC TR 60721-4-3:2001/AMD1:2003. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to IEC TR 60721-4-3:2001 and IEC TR 60721-4-3:2001/AMD1:2003:
a) the document has been totally reworked;
b) all figures have been removed, except in Annex A;
c) severities have been aligned with those of IEC 60721-3-3:2019.