BS EN 61558-2-9:2011
電力變壓器,電抗器,供電機組及其組合的安全性.Ⅲ類手用鎢絲燈變壓器和供電機組的詳細要求和試驗
Safety of transformers, reactors, power supply units and combinations thereof. Particular requirements and tests for transformers and power supply units for class III handlamps for tungsten filament lamps