ABB REX 521 - Page 212

212
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
Fig. 11.3.1.-2 Connection overview diagram of the bus sectionalizer
P1
P2
S1
S2
A
N
L1
L3 L2
REX 521
0 1
CB
DC
100V
Uo
OverviewOutgH03
Circuit-breaker failure
protection
Blocking signal to incoming
feeder (START 3I>>)
TRIP circuit breaker
CLOSE circuit breaker
Internal relay fault
Definite trip alarm
100V
U12
100V
U23
100V
U12b
VT1
CT1
VT2 VT3
VT4
Iob
Io
IL1
IL2
IL3
CT2
CT3
CT4
CT5
5A 1A
5A 1A
5A 1A 5A 1A
1A 0.2A
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
TempAlarm
A
N
L1
L3 L2
Blocking signal
from outgoing
feeders
3I> 50/51
P
3U
3I
Q
E
pf
TCS
CBCM
0
I
MCS
3I~harm
000
R
3U~harm
CBFP
*/62
3I >
2f
68
SYNC
25