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 203
t point and establish a path to earth. When, however, the main cur-rent attempts to flow across, phenomena of electroma^etic repulsion force the arc upwardalong the horns, lengthening and attenuating it, oatil it finally becomes extinguished. Ques. How should lightning arresters be grounded? Ans.… … Fig. l,0-15.^Carbon lightning arrester with fusesas used on telephone lines. The arresterconsists of two blocks of carbon separateda small distance by a thin sheet of insulatingmica, which is perforated with one or moreholes; a high voltage charge on the line willjump through the hole in the mica…
Electrical engineering
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