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), 1833-1928 · New York : T. Audel & Co. · leaf 199
ssible to instantly stop the current by openingthe switch, consequently the current continues to flow andmomentarily jumps the air gap, resulting in a more or less intensearc which tends to burn the metal of the switch. AUXILIARY APPARATUS 411 Ques. How is this remedied to some extent? Ans. The… … Fig. 463.—A quick break knife switch of the single throw, single break, one pole, type.The contact blade is held between the jaws by their clamping friction until the handlecompresses the spring sufficiently to force the blade out. As soon as it breaks contact withthe jaws, the spring expands and…
Electrical engineering
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