IEEE C57.12.00-1968

This standard applies to all distribution and power transformers and to shunt reactors ex­cept as indicated below: Instrument Transformers (see USA Standard Requirements, Terminology, and Test Code for Instrument Transformers, C57.13-1968) Constant-Current Transformers of the Moving­ Coil Type (see USA Standard Requirements, Terminology, and Test Code for Constant­ Current Transformers of the Moving-Coil Type, C57.14-1964) Step- Voltage and Induction-Voltage Regulators (see USA Standard Requirements, Terminol­ogy, and Test Code for Step-Voltage and Induc­tion-Voltage Regulators, C57.15-1965) Current-Limiting Reactors (see USA Standard Requirements, Terminology, and Test Code for Current-Limiting Reactors, C57.16-1958) Specialty Transformers (see USA Standard Requirements and Terminology for Specialty Transformers, C89.1-1961) Rectifier Transformer Equipment (see USA Standard Requirements, Terminology, and Test Code for Pool-Cathode Mercury-Arc Rec­tifier Transformers, C57.18-1964) Arc Furnace Transformers (see USA Standard Requirements for Arc Furnace Transformers, C57.17-1965)



Revision Standard - Superseded. This standard was revised and greatly expanded in 1948, 1949, and 1956. The 1956 edition was comprised of a revision and editorial consolidation of the preceding standards on distribution, power , and regulating transformers, namely American Standard Requirements for Distribution, Power , and Regulating Transformers, and Reactors Other Than Current-Limiting Reactors, C57.12-1949, American Standard Test Code for Distribution , Power, and Regulating Transformers , C57.22-1948, and American Standard Requirements for Transformers-67,000 Volts and Below; 501 Through 10,000 kva, 3 Phase ; 501 Through 5,000 kva, 1 Phase, C57.12a-1954. In addition, in order to eliminate cross-references wherever possible, the consolidation contained excerpts from other standards of the C57 family