Satec EM132 Installation And Operation Manual page 40

‎ C hapter 2
Electrical Installation
Installation
Figure ‎ 2 -15b 3-Wire 2-Element Open Delta Connection Using 3 PTs, 2 CTs (Wiring Mode = 3OP2)
This configuration provides accurate power measurements only if the voltages are balanced.
Figure ‎ 2 -16 4-Wire Wye 2½-Element Connection Using 2 PTs, 3 CTs (Wiring Mode = 3LL3 or 3Ln3)
40 EM13x Series SMART MULTIFUNCTION METER