This revision of ANSI C57.12.80 incorporates a substantial number of changes since the last major revision occurred in 1958. In addition to providing many new terms, some of the more significant changes which have been introduced

This standard is a compilation of terminology and definitions primarily related to electrical transformers and associated apparatus included within the scope of ANSI Committee C57, Transformers, Regulators, and Reactors. It also includes similar data relating to power systems and insulation which is commonly involved in transformer technology.