DIN EN 60216-5-2009 电绝缘材料.耐热特性.第5部分:绝缘材料相对耐热指数(RTE)的测定
Electrical insulating materials - Thermal endurance properties - Part 5: Determination of relative thermal endurance index (RTE) of an insulating material (IEC 60216-5:2008); German version EN 60216-5:2008