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Standard I/O Modules
SICAM A8000 Series, SICAM I/O Modules
Unrestricted
71
DC8-012-2.06, Edition 09.2019
2.9.6.2 Ground Fault Indicator
The current input I2/IN is connected with the LoPo sum current measuring sensor.
In this configuration, the module functions as non-directional ground fault indicator.
2.9.6.3 Fault Detector
The current inputs I1, I2/IN, I3 are connected through the adaptor module CM-8820 with the
corresponding LoPo measuring sensors. Additionally, the voltage inputs U1, U2, U3 are
connected
•
through LoPo voltage transformers of 3.25 V/
√3
with the medium-voltage network
In this configuration, fault information with directional indication is output. Thereby, also all the
measured and calculated measurands are provided.
P1
P2
S1
S2
2
2
5
m
V
N
L3
L2
L1
AI-8511
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
I3
-
I3
+
I1
-
I1
+
D
N
C
D
N
C
D
N
C
N
N
N
D
N
C
I2
-/
IN
+
I2
-/
IN
-
U
3
U
2
U
1
F
E
S
h
ie
ld
C
C
S
h
ie
ld