KS C IEC 61558-2-3-2017 Safety of power transformers, power supply units and similar devices-Part 2-3:Particular requirements for ignition transformers for gas and oil burners
2017KS C IEC 61558-2-3:2017 Safety of power transformers, power supply units and similar devices-Part 2-3:Particular requirements for ignition transformers for gas and oil burners
2002KS C IEC 61558-2-3:2002 Safety of power transformers, power supply units and similar devices-Part 2-3:Particular requirements for ignition transformers for gas and oil burners