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 319
c ic. 2,581.—Westinghouse three phase electrostatic ground detector. 1,838 HAWKIXS ELECTRICITY … Fig. 2,58! — -Jor.es automatic earth leakage cut out. It is an instrument vhich scprotects a direct current circuit that the circuit is broken whenever a leak occurs fromeither main to earth, and so that the circuit cannot be permanently re-established until theleak has been remixed. The instrument…
Electrical engineering
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