ABB REX 521 - Page 205

1MRS751802-MUM
REX 521
205
Protection Relay
Technical Reference Manual, Standard Configurations
Fig. 11.2.1.-2 Connection overview diagram of the incoming feeder
REX 521
0 1
100V
Uo
A
N
L1
L3 L2
OverviewIncH05
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. 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
Tem pAl arm
CB
DC
CLOSE circuit breaker
Circuit-breaker failure
protection
Internal relay fault
3I> -> TRIP2 to the
HV side circuit breaker
OC blocking signal
from the outgoing feeders
and the bus sectionalizer
to the 3I>> stage
TRIP1 circuit breaker
P1
P2
S1
S2
3I >
67
f
P
3U
3I
Q
E
pf
TCS
CBCM
0
I
MC S
3I ~har m
000
R
3U~har m
CBF P
*/62
U
0
3I >
50/ 51
OC blocking signal to the
3I>> stages (3I>-> START)
OC blocking signal to the
HV-side 3I>> stage (3I> START)