GB/T 19212.2-2012 Safety of power transformers, power supplies, reactors and similar products - Part 2: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications
2012GB 19212.2-2012 Safety of power transformers,power supplies,reactors and similar products.Part 2:Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications
2006GB 19212.2-2006 Safety of power transformers, power supply units and similar. Part 2: Particular requirements for separating transformers for general use