SATEC PM174 Manual - Manual (Page 23)

Chapter 2 Installation Electrical Installation
Series PM174 Powermeters 23
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
Figure 2-23 4-Wire 3-Element Delta Direct Connection Using 3 CTs.