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 149
tions. Below 33,000 volts, 1,668 HAWKINS ELECTRICITY the commercial advantages in favor of the series relay are slight,and since it is somewhat difficult to design this device for thelarge current capacities met with at the lower voltage, it isgenerally the practice to use the relay with current…
Electrical engineering
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