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 210
Frame or Core of Armature.^Detection of this fault can be effected by themethods described above, and by disconnecting the whole ofthe armature coils from the commutator and from each other,and testing each separately with a battery and galvanometercoupled up as in fig. 705, one mre being connected… … Fig. 705.—Method of locating short circuits between coils through armature core. Thegalvanometer, battery and coil to be tested are connected in series as shown, and then theunconnected terminal of the galvanometer is brought into contact with the shaft. If thensome portion of the insulation of the…
Electrical engineering
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