Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 142
A Complete switchFig. 137. B Dismantled switch-Contactor switch. 138. Horn Gaps.—The intense heat of an arc causes convectioncurrents of air to flow upward so that, if the switch jaws areshaped as shown in Fig. 138, the arc stream will be blown upwardand will finally break between the arcing tips… … / V arc chute of such shape that the gases; expanding suddenly, canpass out only through the switch contacts. Such arc chutes, asfor example that in diagram A, Fig. 137, when combined withmagnetic blow-out coils, are very effective. 139. Fuses are used to protect electric circuits from overloads.A…
Electrical engineering
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