电气绝缘材料.热稳定性.第5部分:绝缘材料相对耐热指数(RTE)的测定

[中文适用范围]： IEC 60216的本部分规定了根据IEC 60216-1和IEC 60216-2的说明获得的实验数据推导材料的相对耐热指数的实验和计算程序。计算程序是对 IEC 60216-3 计算程序的补充。还给出了在单个固定时间和温度后评估热老化的指南，无需外推。原则上可以使用破坏性@非破坏性或验证测试来获得实验数据@尽管破坏性测试已得到更广泛的应用。从非破坏性或验证测试中获得的数据可能会受到审查，因为到达终点所需时间的测量可能在中值时间之后但在所有样本到达终点之前的某个点终止（见 3.1） IEC 60216-3）。根据热老化性能为材料初步分配绝缘等级@提供了指导。 [外文原描述]： IEC 60216-5 specifies the experimental and calculation procedures to be used for deriving the relative thermal endurance index of a material from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2. The calculation procedures are supplementary to those of IEC 60216-3. Guidance is also given for assessment of thermal ageing after a single fixed time and temperature, without extrapolation. The experimental data may in principle be obtained using destructive, non-destructive or proof tests, although destructive tests have been much more extensively employed. Data obtained from non-destructive or proof tests may be "censored", in that measurement of times taken to reach the endpoint may have been terminated at some point after the median time but before all specimens have reached end-point (see IEC 60216-1). Guidance is given for preliminary assignment of a thermal class for an insulating material, based upon the thermal ageing performance. The calculation procedures of this standard also apply to the determination of the thermal class of an electrical insulation system when the thermal stress is the prevailing ageing factor. This third edition clarifies and corrects a few items and adds an Annex D which provides criteria for the selection of the reference (or reference EIM). The third edition provides instructions for deriving a provisional estimate of the temperature up to which a material may give satisfactory performance in an application (by comparative thermal ageing with a material of known performance). The contents of the corrigendum of December 2009 have been included in this copy. Please be aware that the computer program provided in this publication is not compatible with the 64-bit version of Windows 7.