DIN EN 61558-2-6:1998 Safety of power transformers, power supply units and similar - Part 2-6: Particular requirements for safety isolating transformers for general use (IEC 61558-2-6:1997); German version EN 61558-2-6:1997
2010DIN EN 61558-2-6:2010 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1100 V - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers (
1998DIN EN 61558-2-6:1998 Safety of power transformers, power supply units and similar - Part 2-6: Particular requirements for safety isolating transformers for general use (IEC 61558-2-6:1997); German version EN 61558-2-6:1997