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 165
Figs 2 359 to 2,304.—Westinghouse safety spark gaps. Fig. 2,359, indoor type; figs. 2,360to 2 304 outdoor type. It is well known that with transformers, operating on high volt-age lines and having large ratios of transformation, there may occur, on the low tensionside, momentary voltages to ground…
Electrical engineering
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