ABB REX 521 - Application

30
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
M01
Fig. 3.2.1.1.-1 Block diagram of the standard configuration M01
3.2.1.2. Application
The M01 standard configuration for REX 521 is designed to be used in single busbar
systems using one circuit breaker for selective short-circuit, time overcurrent and
directional earth fault protection of radial isolated neutral networks, solidly earthed
networks, resistant earthed networks and resonant earthed networks.
For more detailed information about the configuration, refer to the application
examples of the standard configuration M01 on Chapter 10. Application examples,
Medium and Section 10.2. Incoming feeder, Medium M01.
49F
3
3I > 50/51
I >
0
67N
3I >
2f
68
I >
46
CBFP
62
TCS
CBCM
3I
I
0
U
0
0
I
MCS
3I~harm
000
R
REX 521 M01
LO
86