3 Phase, Four Wire Wye
Channels A, B, and C are connected to voltage and current probes. The neutral is
Introduction
connected to common and is the reference for the three channels. The figure also shows
voltage connection using channel D as a differential input for measuring neutral to
ground voltage. Neutral to ground measurements are important but optional.
Connection
diagram
Phasor
diagrams
120º
V
C
0º
V
A
V
B
240º
APPENDIX E/ Common Circuit Connections
120º
I
C
I
B
240º
PX5-903
0º
I
A
E-9