Siemens SIMEAS Q80 7KG8080 Operating Instruction page 124

The selections for the configuration are presented in the description of the user interface in the system manual.
3-phase current
4-wire system
3-phase current
3-wire system
Terminal Channels
designation displayed
3xU, 3xI
U = U
U
1
L1
U = U
U
2
L2
U = U
U
3
L3
N
U = U
12
U = U
23
U = U
31
I
L1
I
L2
I
L3
Terminal Channels
designation displayed
circuit
3xU, 2xI - ARON
U
U
L1
U
U
U
L3
N
N= U
U
12
U
23
U
31
I
L1
I
I
L3
3 phase power measurement
-N for Lines n= 1,2,3 each
L1
S =U * I
-N
n nRMS
L2
-N
L3
-U
L1 L2
-U
L2 L3
-U
L3 L1
P,Q,S,cos phi for each of 1st..50th harmonics
=
I I
1 L1
Total power
=
I I
2 L2
=
I I
3 L3
3 phase power measurement
= U
1 L1
= leer
2
= U
3 L3
L2
= U -N
L1
= N-U
L3
= -
U U
U is computed
L3 L1
3
=
I I
1 L1
= -
I I
I is computed
2 1 3
2
=
I I
3 L3
Power Quality Recorder SIMEAS Q80 7KG8080, Operating instruction
Computations
Power computation
nRMS
Power computation
E50417-B1074-C419-A1, Release 07.05.2010
E-47