Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 143
mentary diagrams 1.372 and 1.373 for two phasecurrent, and 6% I md 1.375 for three phase current. Ques. What use is made of two and three phasecurrent ? They are employed rather for power purposes than forlighting, but such systems are often installed for both services. ALTERNATORS 1,131 Ques. How… … phase c Fig. 1.374.—Elementary four pole three phase alternator. There are three sets of inductors,each set connected in series and spaced on the drum with respect to each other two-thirdspole pitch apart. As shown, six collector rings are used, but on actual three phase machinesonly three rings…
Electrical engineering
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