Abstract
After a half century of operation and growth, the Southern California Edison Company is changing the frequency of its system from 50 cycles to 60 cycles per second. Such a change, involving 700,000 customers, requires detailed advance planning and organization, engineering studies of all equipment that is sensitive to changes of frequency, acquisition of stocks of material, and training of personnel. With the assistance of five contractors, the company expects to complete the change on schedule in October 1948 after two years of actual conversion work. In this instance, many items of equipment could be used at the new frequency with only minor or no change, and the system henceforth can operate at the generally accepted United States standard frequency of 60 cycles.
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