Displaying the phase voltage in 3P3W (delta) configuration on the PQ3198/PW3198

A

Yes, it is possible.  First set 3P3W3M wiring. Then, select "PHASE-N"  for "Urms type" in the "SYSTEM-MAIN" screem.  If you select "LINE-LINE", the voltage between phases (line-to-line) can be displayed.