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 61
2.9% that of the single phase system. 1,580 HAWKINS ELECTRICITY Figs. 2,187 and 2,188 are two examples of three phase four wire sys-tems. The relative amount of copper required as compared with thesingle phase system depends on the cross section of the fourth wire.The arrangement shown in fig. 2,… … PlG. -,1JO.—General Electric stanu^u to>ver tor high tension three phase transmission line.FlG. 2,191.—General Electric transposition tower for high tension thre« phase transmission line. ALTERNATING CURRENT SYSTEMS 1,581 conditions which must be considered in order that the economyof the entire…
Electrical engineering
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