Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 304
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 distinct… … 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 PS andPS, respectively. Fig. 221 shows what is called the…
Electrical engineering
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