KS C IEC 61558-2-13:2017 Safety of power transformers, power supply units and similar devices-Part 2-13:Particular requirements for auto-transformers for general use
2017KS C IEC 61558-2-13:2017 Safety of power transformers, power supply units and similar devices-Part 2-13:Particular requirements for auto-transformers for general use
2002KS C IEC 61558-2-13:2002 Safety of power transformers, power supply units and similar devices-Part 2-13:Particular requirements for auto-transformers for general use