ABB RELION REX640 - Page 73

• Connect the wires from the CTs/VTs to the correct device according to the phase
order and the connection diagram.
Sensors (non-conventional instrument transformers)
Current measurement is based on Rogowski coil and voltage measurement is based
on voltage divider. Both current and voltage measurements interface the relay
via one RJ45 connector per phase. There are two different sensor input modules
available, supporting different IEC standards and having different RJ45 connector
pin lay-out.
• SIM1901 supporting IEC 60044
• SIM1902 supporting IEC 61869
There are a number of sensor interface adapters available which can be used to
connect the sensors to the relay, supporting different scenarios both in green field
and retrofit cases. More information can be found in Sensor accessories .
57-240V
N
VT1
57-240V
N
VT2
57-240V
N
VT3
57-240V
N
VT4
57-240V
N
VT5
1/5A
N
CT1
N
CT2
N
CT3
N
CT4
N
CT5 (for residual
X1
X2
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1/5A
1/5A
1/5A
0.2/1A
S1
S2
P2
P1
S1
P1
P2
S2
Positive
Load flow
Direction
AIM1001
n
a
da
dn
A
n
L1 L2 L3
L1
L2
L3
current only)
Figure 67: AIM1001 module
1MRS759115 E
Connecting
REX640
Installation Manual
73