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 76
Fics. 2,209 and 2,210.—Westinghouse disconnecting switches for pressures over 3,.;o • volts … Figs. 2.211 and 2,212.—Westinghouse selector type disconnecting switch. Fig. 2.211, view-showing both sides closed; fig. 2.212. view with one side open. The selector type ofdisconnecting switch is a transfer switch which does not require the circuit to be inter-rupted while making the change. It…
Electrical engineering
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