Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 262
current 7 in each phase of the machine lags the voltageE of that phase by an angle a thenthe power in each phase = EI cos a watts the power in the three phases = 3EI cos a = 3Et ( —t= ) cos a V3V = V3 EJi COS a. since Et = E and h = V32With the same current in the line and the same voltage… … A - Y- Connected B - Delta Connected C- Delta ConnectedLoad Load Load Fig. 269.—Connection of the load to a three-phase circuit,delta as in diagram B. If the lamps shown are 100-watt lampsthen, when Y-connected, the voltage per lamp is 110/V3 or 63.5 1.57 amp. When delta 100 volts and the current…
Electrical engineering
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