ABB REX 521 - Application

60
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
Fig. 3.3.9.1.-1 Block diagram of the standard configuration H09
3.3.9.2. Application
The H09 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, residual overvoltage
protection, underfrequency protection and overfrequency protection.
For more detailed information about the configuration, refer to the application
example of the standard configuration H09 on Section 11.8. Incoming feeder, High
H08/H09.
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
H09_a
3U_B
0 I 79
f</f>
81U/81O