ABB REX 521 - Application

48
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
H05
Fig. 3.3.5.1.-1 Block diagram of the standard configuration H05
3.3.5.2. Application
The H05 standard configuration for REX 521 is designed to be used in single busbar
systems using one circuit breaker for selective non-directional short-circuit
protection, non-directional time-overcurrent protection, non-directional earth fault
protection, overvoltage protection, undervoltage protection and residual overvoltage
protection.
For more detailed information about the configuration, refer to the application
example of the standard configuration H05 on Section 11.5. Incoming feeder, High
H05.
3U< 27
3U>
59
59N
3I > 50/51
I >
0
50N/51N
U >
0
LO
86
f
P
3U
3I
I
0
U
0
Q
E
pf
TCS
CBCM
0
I
MCS
3I~harm
000
R
3U~harm
CBFP
*/62
3I2f
68
3
49
H05 b