Historical
IEC 61378-1 Ed. 1.0 b:1997
Convertor transformers - Part 1: Transformers for industrial application
Deals with specifications, design and testing of power transformers and reactors which are intended for integration within semiconductor convertor plants. It is limited to applications of power convertors of any power rating for local distribution and for equipment not exceeding 36kV. It is not applicable to transformers for HVDC power transmission.
International Electrotechnical Commission [iec]