EN 61558-2-9-2011 变压器,反应堆,供电机组及其组合的安全性.第2-9部分:III类手提式钨丝灯用变压器和供电机组的特殊要求和试验
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