PPT Slide
Calculate the line-to neutral voltage phasors, the line-to-line voltage phasors, the line current phasors and the load’s three-phase complex power given VAN is the reference phasor and the phase sequence is abc.
VAN = (220 V./Ö3)/ 0° » 127/ 0° V. (Ref. Phasor) \ VBN = 127/-120 ° V.
and VCN = 127/+120 ° V. (for abc sequence) and from the voltage “triangle,”
VAB = 220/+30 ° V., VBC = 220/-90 ° V. and VCA = 220/+150 ° V.
The line-current phasors are IA = VAN/Z = 127/ 0° V./(4 - j3) W or
IA = 127/ 0° V./5/-36.87°W » 25.4/+36.87° A. Similarly …
IB = 25.4/+83.13° A. and IC = 25.4/+156.87° A.
Section 11.3: Power in Three-Phase Systems cont.