Standardization of voltage ratings for power systems and equipment

This paper undertakes to analyze the voltage practises and requirements of alternating current power systems with the aim of arriving at voltage standards that adequately correct and extend present standards. Utilization, or receiving terminals, is taken as the point of reference and for designation of system, circuit and equipment voltages. For this analysis and development of voltage standards a comprehensive chart, showing operating voltage limits of representative systems, is given in Plate 1. A tabulation summarizing the proposed standard voltage ratings is given in Table XI.