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 138
Figs. 2.311 and 2.312.—General Electric alternating current low pressure series overloadrelays. Fig. 2.311, instantaneous time limit relay; fig. 2.312. inverse time limit relay.These relays nave carbon contacts and will make or break a direct current circuit of 10amperes at 125 volts without…
Electrical engineering
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