IEC 60172:2020作为IEC 60172:2020 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 60172:2020规定了根据IEC 60216-1的规定，通过定期监测响应于交流耐压测试的变化，在大气压力下评估涂有或未涂有浸渍剂的漆包线以及胶带缠绕的圆形和矩形线的温度指数的方法。本程序不适用于纤维绝缘电线或用含有无机纤维的胶带覆盖的电线。注:根据本测试程序获得的数据为设计者和开发工程师提供了选择绕组线的信息，以进一步评估绝缘系统和设备测试。这第五版取消并取代了2015年出版的第四版。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: -修订3.1，热指数的定义； -3.3修订版，失效时间； -为清楚起见，修订5.1.1并减少测试适用的导线尺寸范围； -为清楚起见，对5.1.2进行了修订，涉及胶带缠绕的圆线和漆包线或胶带缠绕的矩形线； -修订第9条，在报告中加入相关系数r。

IEC 60172:2020 is available as IEC 60172:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60172:2020 specifies, in accordance with the provisions of IEC 60216-1, a method for evaluating the temperature index of enamelled wire, varnished or unvarnished with an impregnating agent, and of tape wrapped round and rectangular wire, in air at atmospheric pressure by periodically monitoring changes in response to AC proof voltage tests. This procedure does not apply to fibre-insulated wire or wire covered with tapes containing inorganic fibres. NOTE The data obtained according to this test procedure provide the designer and development engineer with information for the selection of winding wire for further evaluation of insulation systems and equipment tests. This fifth edition cancels and replaces the fourth edition published in 2015. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- revision of 3.1, definition of thermal index;
- revision of 3.3, time to failure;
- revisions to 5.1.1 for clarity and to reduce the range wire size range to which the test applies;
- revisions to 5.1.2 for tape wrapped round and enamelled or tape wrapped rectangular wire for clarity;
- revision to Clause 9 to add the correlation coefficient, r to the report.