ABB REX 521 - Page 234

234
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
Fig. 11.7.1.-2 Connection overview diagram of the single busbar motor feeder
REX 521
CB
DC ES
0 1
100V
Uo
A
N
OverviewOutgH07
100V
U1 2
100V
U2 3
100V
U3 1
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
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
P1
P2
S1
S2
S1
S2
1
0
M
49
3
60
F
3I <
37
I2>
46
46R
3I 3I
48, 14, 66
Is2t,n<
3I >
50/ 51
I >
0
50N/ 51N
f
P
3U
3I
I
0
U
0
Q
E
pf
TCS
CBCM
0
I
MCS
3I ~har m
000
R
3U~har m
CBF P
*/62
3U< 27
Circuit-breaker failure
protection
RESTART enable
TRIP circuit breaker
CLOSE circuit breaker
Internal relay fault
Speed Switch
Definite trip alarm
Mains
ACFail
Tem pA la rm
Prior alarm