General requirements for Home and Building Electronic Systems (HBES) and Building Automation and Control Systems (BACS) Part 3: Electrical safety requirements; German version EN 50491-3:2009
家用和建筑电子系统(HBES)以及建筑自动化和控制系统(BACS)的一般要求第3部分:电气安全要求;德文版EN 50491-3:2009