Siemens SICAM Q80 Operating Instruction page 36

E-36 SICAM Q80 7KG8080
11.2.1.1 Four-wire configuration (star circuit)
U1, U2, U3 lines 1,2,3, U4 – PE (protection ground) line
N neutral
I1,I2,I3,I4 connected or unconnected (U4, I4 can be measured optionally
11.2.1.2 Three-wire configuration (delta connection)
U1, U3 lines 1,3,
N line 2
I1, I3 lines 1 and 3
I2 line 2 optionally possible
Three-wire configuration (delta connection)
11.2.1.3 Single-phase connection
Single-phase connection
Power Quality Recorder SICAM Q80 7KG8080, Operating instruction
E50417-B1074-C419-A2, Release 12.01.2015
Four-Wire configuration