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 75
nder running conditions. These switches are designed to meet thisdifficulty and are used without auto-starters to control motors up to 5 horse power rating. 1,894 HAWKINS ELECTRICITY Ques. What is the objection to open air break? Ans. The relatively long gap required to extinguish the arc,limiting… … Fig. 2,208.—Wcstinghouse single pole disconnecting switch. Discor. bes are used primarily for isolating apparatus from the circuit for purposes of inspection and repair;also for sectionalizing feeders. They are not designed for opening under load, and there-fore no attempt should be made to open…
Electrical engineering
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