scope:

This standard covers electrical char¬acteristics and mechanical features of 3-phase, 60- cycle, 2-winding, mineral-oil-immersed indoor transformers rated 250 to 35000 kva, inclusive, high voltage 2400 to 34400 volts, inclusive, used for sup¬plying electric power to direct arc ferrous-melting furnaces.

All characteristics and definitions, ex¬cept as specifically covered in this standard, shall be in accordance with the American Standard Require¬ments, Terminology and Test Code for Distribution, Power and Regulating Transformers, and Reactors Other Than Current-Limiting Reactors, C57.12-1958, or the latest revision thereof approved by the Ameri¬can Standards Association, Incorporated.

Certain information in the American Standard and in this First Report may eventually be included in sections which will be prepared for general require¬ments, terminology and test code for arc furnace transformers.