DIN EN 60034-5:2007
旋转电机.第5部分:旋转电机总体设计给出的保护等级(IEC 60034-5:2000 + Corrigendum 2001 + A1:2006)
Rotating electrical machines - Part 5: Degrees of protection provided by integral design of rotating electrical machines (IP code) - Classification (IEC 60034-5:2000 + Corrigendum 2001 + A1:2006); German version EN 60034-5:2001 + A1:2007