Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 289
type of distribu-tion for any other set of voltages, higher or lower, that mightbe required in special cases, and whatever follows in regard tothe 120- to 240-volt system is equally applicable to them. To bring out clearly the underlying ])rinciple of the three-wnre system, let us first give our… … Fig. 300.—Ten lamps connected on three-wire circuit. 500-watt lamps, nuiking the load on each 12 X 500 = 6,000 6,000 .,, , „ , , watts ur = oO amperes when ail the lamps are turned on. 120 The direction of the currents througli the niains .1, A, Y,and B is that indicated by the arrowheads. For…
Electric machinery
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