E-Mon E-PS-E-RTU-N - Manual (Page 27)

Chapter 2 Installation Electrical Installation
PowerSmart+ Power Quality Meter 27
This configuration provides accurate power measurements only if the voltages are balanced.
Figure 2-13 4-Wire Wye 2½-Element Connection Using 2 PTs, 3 CTs (Wiring Mode = 3LL3 or 3Ln3)
Figure 2-14 3-Wire 2½-Element Open Delta Connection Using 2 PTs, 3 CTs (Wiring Mode = 3OP3)