PPT Slide
Calculate the magnitude of the phase voltage and the total three-phase complex power supplied to the load.
|Vph| = |Vln| = |Vll| /Ö3= 220 V. / Ö3 » 127 V. (answer)
Z = 3 + j4 W » 5/ 53.13° W \ q » 53.13° so that …
|Il| = |Iph| = |Vln|/|Z| » 127 V./ 5 W » 25.4 A. so that ...
S3ph = Ö3|Vll||Il|(cosq + jsinq) = Ö3 ´ 220 V. ´ 25.4 A. ´ (0.6 + j0.8)
S3ph » 5.81 KW + j7.74 KVAR (answer) » 9.68/ 53.13° KVA
Section 11.3: Power in Three-Phase Systems cont.
Example 11.2 (pp. 462-463)