IEC 61558-2-13:2022 Safety of transformers, reactors, power supply units and combinations thereof - Part 2-13: Particular requirements and tests for auto-transformers and power supply units incorporating auto-transformer
2009IEC 61558-2-13:2009 Safety of transformers, reactors, power supply units and similar products for voltages up to 1100 V - Part 2-13: Particular requirements and tests for auto transformers and power supply units incorporating auto transformers
1999IEC 61558-2-13:1999 Safety of power transformers, power supply units and similar devices - Part 2-13: Particular requirements for auto-transformers for general use