ABB REX 521 - Page 200

200
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
Fig. 11.1.1.-2 Connection overview diagram of the incoming feeder
100V
U12b
VT1
Iob
Io
CT4
CT5
5A 1A
1A 0. 2A
18
16
15
13
14
12
10
11
X1 . 1
REX 521
0 1
A
N
L1
L3 L2
OverviewIncH05
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
OC blocking signal to the
3I>>> stages (3I>-> START)
OC blocking signal to the
HV-side 3I>> stage (3I>>-> START)
X2 . 1
DIFF
Sensor VD3
X2 . 2
DIFF
Sensor VD2
X2 . 3
DIFF
Sensor VD1
X2 . 4
DIFF
Sensor RS3
X2 . 5
DIFF
Sensor RS2
X2 . 6
DIFF
Sensor RS1
2
2
2
2
2
2
3I >
67
f
P
3U
3I
Q
E
pf
TCS
CBCM
0
I
MCS
3I ~har m
000
R
CBF P
*/62
U
0
3I >
50/ 51
SYNC
25