IEC IEEE 60076-57-1202:2017 covers the requirements for phase-shifting transformers of all types. The scope excludes transformers with an unregulated phase shift.
This document is limited to matters particular to phase-shifting transformers and does not include matters relating to general requirements for power transformers covered in existing standards in the IEC 60076 series or IEEE Std C57.12.00™ and IEEE Std C57.12.10™.