E-Mon E-PS-E-RTU-N - Manual (Page 26)

Chapter 2 Installation Electrical Installation
26 PowerSmart+ Power Quality Meter
Figure 2-11 4-Wire Wye 3-Element Connection Using 3 PTs, 3 CTs (Wiring Mode = 4LL3 or 4Ln3)
Figure 2-12 3-Wire 2-Element Open Delta Connection Using 2 PTs, 2 CTs (Wiring Mode = 3OP2)