PPT Slide
Calculate the magnitude of the line current and the total three-phase complex power supplied to the load.
|Iph| = |Vll| / |Z| = 220 V. / |3 + j4| W = 220 V. / 5 W = 44 A.
|Il| = Ö3|Iph| = Ö3 ´ 44 A. » 76.21 A. (answer)
Z = 3 + j4 W » 5/ 53.13° W \ q » 53.13° so that …
S3ph = Ö3|Vll||Il|(cosq + jsinq) = Ö3 ´ 220 V. ´ 76.21 A. ´ (0.6 + j0.8)
S3ph » 17.4 KW + j23.2 KVAR (answer) » 29/ 53.13° KVA
Section 11.3: Power in Three-Phase Systems cont.