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ABB Industrial IT enabled REX 521 Technical Reference Manual, General page 42

Protection relay
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5(; 

+
Q0
* )
L3
L1
S1
P1
S2
P2
S1
S2
*) Power flow direction
**) The jumper is not assembled by default
when the protection relay is delivered
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42
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Technical Reference Manual, General
7HUPLQDO GLDJUDP RI 5(;  0HGLXP
L1
L3
A
N
da
dn
X1.1
18
100V
16
15
0,2A
14
1A
13
12
1A
11
5A
10
9
1A
8
5A
7
6
1A
5
5A
4
3
1A
2
5A
1
X4.2
5
-
6
7
8
9
10
11
12
13
14
15
16
17
18
X3.1
1
2
9
10
ACFail
TempAlarm
VT1
U
0
CT5
I
0B
CT4
I
0
CT3
I
L3
CT2
I
L2
CT1
I
L1
HSPO1
TCS1
DI1
DI2
DI3
DI4
DI5
DI6
DI7
DI8
DI9
DATA A
RS-485
DATA B
1MRS 751108-MUM
X4.1
+
1
Mains
2
-
5
I R F
4
3
8
7
6
SO1
10
11
SO2
9
12
13
PO1
14
15
PO2
17
+
18
PO3
X4.2
4
3
**)
2
1
+
X3.2
SERIAL BUS
X3.3
SERIAL BUS
0
-
I
-

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