KS C IEC 61558-2-12-2017(2022) 变压器、电抗器、电源装置及其组合的安全.第2-12部分:恒压控制电压变压器和电源装置的特殊要求和试验
Safety of Transforemers, Reactors, Power supply units and combination thereof — Part 2-12: Particular requirements and tests for control voltage transformers and power supply units for constant voltag