ABB REX 521 - Page 217

1MRS751802-MUM
REX 521
217
Protection Relay
Technical Reference Manual, Standard Configurations
Fig. 11.4.1.-2 Connection overview diagram of the outgoing feeder
REX 521
C
B
D
C
E
S
0 1
100V
Uo
A
N
O
utgH04
Circuit-breaker failure
protection
Blocking signal to incoming
feeder (START 3I>>)
TRIP circuit breaker
CLOSE circuit breaker
Internal relay fault
Control signal for selecting
the basic angle of Io>-->
(BACTRL)
External reclosure
initialization signal
Definite trip alarm
100V
U12
100V
U23
100V
U31
VT1
CT1
VT2 VT3
VT4
I ob
I o
I L1
I L2
I L3
CT2
CT3
CT4
CT5
5A 1A
5A 1A
5A 1A 5A 1A
1A 0. 2 A
L1
L3 L2
27
25
24
22
21
19
18
16
15
13
14
12
10
11
9
7
8
6
4
5
3
1
2
X1. 1
X4. 2
5
6
7
8
9
10
12
11
14
13
16
15
18
17
X3. 1
2
1
X4. 1
2
1
4
5
3
7
8
6
11
10
9
13
12
14
17
15
18
X4. 2
3
4
1
2
DI1
DI2 DI3
DI4
DI5 DI6
DI7 DI8 DI9
IRF
S01
S02 P01
P02 P03 HSPO1
TCS1
Mains
ACFail
Tem pA la rm
P1
P2
S1
S2
S1
S2
49F
3
I >
46
0
I
79
3I >
50/ 51
I >
0
50N/ 51N
f
P
3U
3I
I
0
Q
E
pf
TCS
CBCM
0
I
MC S
3I ~har m
000
R
3U~har m
CBF P
*/62
I >
0
67N
U
0