DIN EN 61558-2-9-2011 变压器,电抗器,电源装置及其组合的安全.第2-9部分:III级手提钨丝灯用变压器和电源装置的特殊要求和试验(IEC 61558-2-9-2010);德文版本EN
Safety of transformers, reactors, power supply units and combinations thereof - Part 2-9: Particular requirements and tests for transformers and power supply units for class III handlamps for tungsten filament lamps (IEC 61558-2-9:2010); German version EN