GB/T 19212.27-2017 Safety of transformers,reactors,power supply units and combinations thereof—Part 27: Particular requirements and tests for transformers and power supply units all for saving energy and other purposes
2017GB/T 19212.27-2017 Safety of transformers,reactors,power supply units and combinations thereof—Part 27: Particular requirements and tests for transformers and power supply units all for saving energy and other purposes