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 194
AILS TO EXCITE 613 Speed too Low.—In shunt and compound dynamos there isa certain critical speed below which they will not excite. If thenonnal speed of the machine be known, it can be seen whetherthe failure to excite arises from this cause, by measuring thespeed of the armature with a speed… … 4>0<K> Fig. 692.—Method of testing for break by short circuiting the terminals of the machine. Ifthe external circuit test out apparently all right, and there be no defective contacts inany part of the machine, and all short circuiting switches, etc., be cut out of circuit, themachine…
Electrical engineering
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