UNE-EN 61558-2-12:2011 Safety of transformers, reactors, power supply units and combinations thereof -- Part 2-12: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage
2011UNE-EN 61558-2-12:2011 Safety of transformers, reactors, power supply units and combinations thereof -- Part 2-12: Particular requirements and tests for constant voltage transformers and power supply units for constant voltage