KS C IEC 61558-2-1-2017 Safety of power transformers, power supply units and similar-Part 2:Particular requirements for separating transformers for general use
2022KS C IEC 61558-2-1:2022 Safety of transformers, reactors, power supply units and combinations thereof — Part 2-1: Particular requirements and tests for separating transformers and power supply units incorporating separating
2017KS C IEC 61558-2-1:2017 Safety of power transformers, power supply units and similar-Part 2:Particular requirements for separating transformers for general use
2002KS C IEC 61558-2-1:2002 Safety of power transformers, power supply units and similar-Part 2:Particular requirements for separating transformers for general use