GB/T 19212.14-2012 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 14: Particular requirements and tests for auto transformers and power supply units incorporating auto transformers
2012GB/T 19212.14-2012 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 14: Particular requirements and tests for auto transformers and power supply units incorporating auto transformers