E-Mon E-PS-A-RTU-N - Manual (Page 22)

Chapter 2 Installation Electrical Installation
22 PowerSmart+ Advanced Power Quality Meter
Wiring Mode = 3LL3 or 3Ln3
This configuration provides accurate power measurements only if the
voltages are balanced.
Figure 2-22 3-Wire Open 2½-Element Delta Connection Using 2 PTs, 3 CTs.
Wiring Mode = 3OP3