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 215
transrrittingpower relatively long distances,600volt,= is usually employed.Where there is a demand for480 volt service, a 480 volt al-ternator should be selected andif lower voltages arealso desiredan auto-transformer may befurnished by means of which 240 volts can be obtained. When 120 volt… … Fig. 1.474.—Western Electric station-ary armature. In this type ofarmature, the core upon which thewinding is placed, is built into theframe as shown, the core teeth pro-jecting inwardly like internal gearteeth, forming a cylindrical cham-ber for the revolving field. The coreis built up of iron,…
Electrical engineering
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