IEC 60370:2017涵盖了测定用于浸渍目的的电绝缘树脂和清漆的耐热性（温度指数）的测试方法。它是通过浸渍玻璃布并测量热老化前后的电强度或击穿电压来完成的。它涵盖了IEC 60455-3-5和IEC 60464-3-2中描述的材料以及类似材料。这第二版取消并取代了1971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: -本文件现在描述两种方法，现有方法遵循ASTM D1932，新方法遵循IEC 60455-2和IEC 60464-2的要求； -删除了理论背景和计算方法，代之以参考IEC 60216；-更新了布局和编号系统； -为了更好地理解和说明，添加了示例。 关键词:热耐久性试验

IEC 60370:2017 covers methods of test for the determination of thermal endurance (temperature index) of electrical insulating resins and varnishes for impregnation purposes. It is done by means of impregnating glass cloth and measuring electric strength or breakdown voltage before and after heat ageing. It covers the materials described in IEC 60455-3-5 and IEC 60464-3-2 and similar materials. This second edition cancels and replaces the first edition published in 1971. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- this document is now describing two methods, the existing one, following ASTM D1932 and new a method following the requirements of IEC 60455-2 and IEC 60464-2;
- the theoretical background and way of calculation were removed, and replaced by reference to IEC 60216;
- the layout and numbering system was updated;
- for better understanding and illustration purposes examples were added.
Keywords: thermal endurance testing