Standard I/O Modules
72 Unrestricted SICAM A8000 Series, SICAM I/O Modules
DC8-012-2.06, Edition 09.2019
2.9.6.3.1 3-Phase Voltage, 3-Phase Current
Through the current inputs I1, I2/IN, I3 the corresponding phase currents are measured. The
value IN is calculated.
This configuration is used for solidly grounded networks. In this configuration, the module
works also as a power meter.
Example: Middle-voltage network
2.9.6.3.2 3-Phase Voltage, 2-Phase Current + Sensitive Ground Current
Through the current inputs I1, I3 the corresponding phase currents are measured, I2/IN is
connected with the sensitive ground current transformer. The value I2 is calculated.
This configuration is used for isolated and resonant grounded networks.
Example: Middle-voltage network
P2P1
P2
P1
P2
P1
S2S1
S2S1
S2
S1
225 mV
225 mV
225 mV
BABA
B
A
baba
b
a
3,25 V/√3
3,25 V/√3
3,25 V/√3
20 kV
20 kV
20 kV
N
L3
L2
L1
AI-8511
X2
1
2
3
4
5
6
7
8
9
X1
1
2
3
4
5
6
7
8
9
10
DNC
I3-
I3+
I1-
I1+
DNC
DNC
DNC
N
N
N
DNC
I2-/IN+
I2-/IN-
U3
U2
U1
FE Shield
CC Shield
P2
P1
P2
P1
P2
P1
S2S1
S2
S1
S2
S1
225 mV
225 mV
225 mV
BABA
B
A
baba
b
a
3,25 V/√3
3,25 V/√3
3,25 V
/√3
20
kV
2
0 k
V
20 kV
N
L3
L2
L1
AI-8511
X2
1
2
3
4
5
6
7
8
9
X1
1
2
3
4
5
6
7
8
9
10
DNC
I3-
I3+
I1-
I1+
DNC
D
NC
DNC
N
N
N
DNC
I2
-/I
N+
I2
-/IN
-
U3
U2
U1
FE Shield
CC Shield
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