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 39
Figs. 1.262 and 1.263.—Hydraulic analogy- illustrating three phase alternating current. Threecylinders are here shown with pistons connected through Scotch yokes to cranks placed120° apart. The same action takes place in each cylinder as in the preceding cases, theonly difference being the…
Electrical engineering
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