Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1314
r trans-formed to a high voltage, which economical distribution dic-tates, alternating current is almost invariably used for allexcept very small electrical power transmissions. Wherever Rotary Converters 1279 direct current is used, as in direct current railway lines, thealternating current must… … Fig. 599 westinghouse 300 k. w. rotary converter, 600 d. c. volts, 500 d. c. amperes, three-phase, 60 cycles higher efficiency and lower cost of the rotary converter ac-counts for the almost universal practice of using it in pref-erence to the motor-generator on low frequencies. Eotary converters…
