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 22
STEMS 1,541 Parallel Circuits.—These are used for constant pressureoperation. Such arrangement provides a separate circuit foreach unit making them independent so that they may vary insize and each one can be started or stopped without interferingwith the others. Parallel circuits are largely used… … Fig. 2,137.—Diagram of parallel series circuit, showing fall of pressure between units. Thissystem is very rarely used; it has the disadvantage that if a lamp filament break, theresistance of the circuit is altered and the strength of the current changed. The volt-meter shows the fall of pressure…
Electrical engineering
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