Alternating-current machinery: a practical treatise on alternating-current principles and systems, commercial types of alternators, synchronous motors, transformers, converters, induction motors, switchboard and station appliances, etc. (1912)
American School (Chicago, Ill.), Esty, William, 1868-1928 · Chicago, American School of Correspondence · leaf 278
stem sion systems of which the separate and distinct electromotive forcesor currents are maintained in definite phase relations with each other bymechanical connections in the generator. Step-up or step-down trans-formation in a polyphase system is accomplished, in general, by aseparate and… … Fig. 222. Connections for Three Transformers with Primaries Con-nected to Three-Wire Three-Phase Mains entirely independent circuit, and the electromotive force of eachphase is stepped down (or up) by an ordinary transformer P/S andPS, respectively. Fig. 221 shows what is called the…
Electric machinery -- Alternating current
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