ABB REU 523 - Connection Diagram

Combined overvoltage and undervoltage
relay
REU 523
1MRS 751123-MBG
8
Connection
diagram
Fig. 1 Connection diagram of the combined overvoltage and undervoltage relay
L1
L2
L3
ConD1_U_523
U
aux
1
2
3
SGB1
SGB1
SGB1
~
~
X
3
X
3
2
X
2
X
1
X
1
X
X
4
X
4
5 6
3 4
13 14 15
1 2
17 18
1 3 4 6 7 9
SGB1
SGB1
5
6
10 11 12
7 8 9
X2.1
X1.1
100 V 110 V 115 V
3U<
3U<<
SGB1
7
SGB1
8
X
4
X
4
X
3
X
3
2
X
2
X
1
X
1
X
+ -
3U>
3U>>
100 V 110 V 115 V
100 V 110 V 115 V
a
PO1PO2
IRF
BI
SO1SO2
IRF
TRIP
SGR1
SGR2
SGR3
SGR4
START
START
TRIP
START
START
TRIP
TRIP
SGR5
SGR6
SGR7
SGR8
A
n
N
PC
Tx
Rx
1MRS090701
RER 103
1MKC950001-1
4
SGB1
Blocking of stage U>>
Blocking of stage U>
Blocking of stage U<<
Blocking of stage U<
x = Factory Default
Optical
PC-interface
Serial
port
I/O
INDICATIONS CLEARED
OUTP. CONT. UNLATCHED
AND INDIC. CLEARED
SWITCHGROUP SELECTION
MEMORIZED VALUES AND
INDIC. CLEARED; OUTPUT
CONTACTS UNLATCHED