IEC TS 62271-304:2019适用于符合IEC 62271-200和IEC 62271-201的室内封闭式开关设备和控制设备，旨在用于偏离IEC 62271-1中规定的正常使用条件的冷凝和污染的特殊使用条件。 本文件中详述的测试主要用于对暴露于室内使用条件（主要是存在冷凝）的高压电气绝缘设备的电气绝缘性能进行分类。还考虑了机械部件的评估，如机构、联锁装置和外壳。 这第二版取消并取代了2008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:a)冷凝和污染下的几种使用条件的描述； b)根据测试程序，封闭式开关设备和控制设备的分类不包括污染的使用条件PL和PH； c)附录B中基于ISO/IEC标准对典型室内环境的更广泛描述； d)新的附件C，就改善室内操作条件的预防措施提供指导； e)新的附件D，专门用于机械特性记录等可选项目； f)提供了一个新的附件E，给出了具有冷凝和污染的环境的额外组合，以及老化测试的测试程序提案，以创造关于实验室老化效应和现场条件老化效应之间相关性的经验。

IEC TS 62271-304:2019 applies to indoor enclosed switchgear and controlgear complying with IEC 62271-200 and IEC 62271-201, intended to be used in special service conditions with respect to condensation and pollution deviating from the normal service conditions specified in IEC 62271-1.


The test detailed in this document has been designed primarily to classify the electrical insulation performance of equipment having high-voltage electrical insulation exposed to indoor service conditions, mainly in presence of condensation. The assessment of mechanical components, such as mechanisms, interlocks and enclosure is also considered.
This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous edition:

a) the description of the several service conditions under condensation and pollution;

b) the classification of enclosed switchgear and controlgear, according to the testing procedure does not cover polluted service conditions PL and PH;

c) a wider description in Annex B of typical indoor environments based on ISO/IEC standards;

d) a new Annex C giving guidance on precautions to improve indoor operating conditions;

e) a new Annex D dedicated to the optional items such as records of mechanical characteristics;

f) a new Annex E, giving additional combinations of environments with condensation and pollution, as well as a proposal of testing procedure of ageing test, is provided to create experience on correlation between ageing effects in laboratory and ageing effects at site conditions.