Satec System 295 Installation And Operation Manual page 29

3) Three Wire Open Delta Connection Using 2 PTs, 3 CTs (2½-
element)
This configuration, shown in Figure 2-7, can be used with either 660V or 120V
input. Readings represent line-to-line voltages. All three line currents are measured.
The common taps of the PT secondaries are connected to terminal 11.
Note the connection between terminals 5 and 11.
Figure 2-7 3-Wire Open Delta Connection Using 2 PTs, 3 CTs (2½-element)
WIRING MODE 3OP3
Installation 21