GB 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
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