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Standard I/O Modules
SICAM A8000 Series, SICAM I/O Modules
Unrestricted
59
DC8-012-2.06, Edition 09.2019
2.8.6
External Circuitry
The following circuitry variants are examples and not related exclusively to the shown values.
Danger
Works on the circuitry may be performed in de-energized state only!
During electrical installation, all the rules and regulations of power systems must be considered.
2.8.6.1 Short-Circuit Indicator
The current inputs I1, I2/IN, I3 are connected via the adaptor module CM-8820 with the
measuring transformers of the corresponding phase currents.
In this configuration, the module functions as short-circuit indicator. Fault information on the
direction is not provided.
Note
With this connection scheme, the accuracy of ground current measurements for isolated/resonant ground
connections cannot be assured.
1
2
3
4
5
6
7
8
9
1
0
X
1
AI-8510
2
2
5
m
V
2
2
5
m
V
2
2
5
m
V
P2
P1
P2
P1
P2
P1
S2
S1
S2
S1
S2
S1
1
A
1
A
1
A
1
2
3
4
5
6
X
1
1
2
3
4
5
6
7
8
9
1
0
I1
_
P
I1
_
N
I2
_
P
I2
_
N
I3
_
P
I3
_
N
D
N
C
I3
-
D
N
C
D
N
C
I1
+
I1
-
I3
+
CM-8820
X
2
F
E
S
h
ie
ld
I2
-/
IN
-
I2
-/
IN
+
1
2
3
4
5
6
7
8
9
1
0
X
1
CM-8820
2
2
5
m
V
2
2
5
m
V
2
2
5
m
V
AI-8510
X
2
1
2
3
4
5
6
7
8
9
X
1
1
2
3
4
5
6
7
8
9
1
0
D
N
C
N
N
N
D
N
C
D
N
C
I3
-
D
N
C
D
N
C
I1
+
I1
-
I3
+
I2
-/
IN
-
I2
-/
IN
+
U
3
U
2
U
1
F
E
S
h
ie
ld
C
C
S
h
ie
ld