电气绝缘材料.耐热性能.第6部分:使用固定时间框架法测定绝缘材料的耐热指数(TI和RTE)

[中文适用范围]： IEC 60216 的这一部分规定了使用“固定时间框架法 (FTFM)”得出材料耐热特性、温度指数 (TI) 和相对耐热指数 (RTE) 的实验和计算程序。在该协议中，老化在少数固定时间内进行，每次老化使用适当数量的老化温度，在相关时间间隔结束时测量样品的特性。这与 IEC 60216-1 的程序不同，在 IEC 60216-1 中，老化是在少数固定温度下进行的，性能测量在老化时间后进行，具体取决于老化的进度。固定时间框架法中使用的诊断测试仅限于破坏性测试。该方法尚未应用于非破坏性或验证测试程序。根据 FTFM 协议确定的 TI 和 RTE 均来自根据本标准中修改的 IEC 60216-1 和 IEC 60216-2 的说明获得的实验数据。计算程序和统计测试根据 IEC 60216-3 和 IEC 60216-5 进行了修改。 [外文原描述]： Specifies the experimental and calculation procedures for deriving the thermal endurance characteristics, temperature index (TI) and relative thermal endurance index (RTE) of a material using the "fixed time frame method (FTFM)". In this protocol, the ageing takes place for a small number of fixed times, using the appropriate number of ageing temperatures throughout each time, the properties of the specimens being measured at the end of the relevant time interval. This differs from the procedure of IEC 60216-1, where ageing is conducted at a small number of fixed temperatures, property measurement taking place after ageing times dependent on the progress of ageing. The diagnostic tests employed in the fixed time frame method are restricted to destructive tests. The method has not as yet been applied to non-destructive or proof test procedures. Both the TI and the RTE determined according to the FTFM protocol are derived from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2 as modified in this standard. The calculation procedures and statistical tests are modified from those of IEC 60216-3 and IEC 60216-5. The significant technical changes with respect to the previous edition are as follows. - This new edition has been supplemented by Annex G and the corresponding software.