Applies to three-phase and single-phase transformers including autotransformers. Defines the rating and connection symbols. Gives certain specifications for transformers having a tapped winding. Defines information which shall be marked on the rating plate and the tests to be conducted. Supersedes IEC 60076-1(1976) and IEC 60076-4 (1976). The contents of the corrigendum of June 1997 have been included in this copy. This consolidated version consists of the second edition (1993) and its amendment 1 (1999). Therefore, no need to order amendment in addition to this publication.