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 175
er should be wrapped in a woolen rag. Thescrews and nuts securing the different connections and cables should beexamined occasionally, as they frequently work loose through vibration. Instructions for Stopping Dynamos.—When shuttingdown a machine, the load should first be gradually reduced,… … Fig. 684.—Diagram illustrating forces acting on a dynamo armature. In the figure the normalfield magneto-motive force is in the direction of the line 1. 2, produced by the field circuitG,if there were no current in the armature. But as soon as the armature current flows,it produces the opposing…
Electrical engineering
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