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 213
tio of conversion depend? Ans. Upon the number of phases and method of connecting the windings. For single phase or two phase machines it is 1 to .7; for three phase,1 to .612, or six phase, 1 to .7 or 1 to .613 depending upon the kindof connection used for the transformer. For example, a two phase… … PIG. 2.049.—Commutating pole of Westinghouse commutating pole rotary converter. Thecommutating poles are similar in general construction to the main poles. The coils areof bare copper strap wound on edge. Ventilating spaces are provided between the poleand coil and between turns. The copper winding…
Electrical engineering
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