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Electronic frequency changer used as nonsynchronous tie between A-C power systems

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1 Author(s)
Winograd, Harold ; Allis-Chalmers Manufacturing Company, Milwaukee, Wis.

EARLY in 1943 a 6,667-kw electronic frequency changer, using mercury-arc rectifiers, was installed in the Gary Sheet and Tin Mill of the United States Steel Corporation, at Gary, Ind., to provide a nonsynchronous tie between the 25-cycle and 60-cycle power systems, for the controlled interchange of power in either direction.1 All the 25-cycle power is generated in the steel company's plants in the Chicago district. The 60-cycle system is supplied by the steel company's generating equipment and by the Northern Indiana Public Service Company. The generating capacity of each system is over 200,000 kw.

Published in:

American Institute of Electrical Engineers, Part I: Communication and Electronics, Transactions of the  (Volume:72 ,  Issue: 3 )