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 206
notburnt out, can generally be located by the baked appearance ofthe varnish or insulation, and by its excessive temperature over ARMATURE TROUBLES 625 the rest of the coils, being detected also by the baked appear-ance of the ^^arnish or insulation. Oues. What should be done if the machine do… … Fig. 701.—Test for break in armature lead. Clean the brushes and commutator, and applycurrent from a few cells of battery having a telephone receiver in circuit as shown in thefigure. If the machine have more than two brushes, connect the leads to two adjoiningbrushes and raise the others. ISow…
Electrical engineering
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