ABB REX 521 - Application

1MRS751802-MUM
REX 521
33
Protection Relay
Technical Reference Manual, Standard Configurations
Fig. 3.2.2.1.-1 Block diagram of the standard configuration M02
3.2.2.2. Application
The M02 standard configuration for REX 521 is designed to be used in single busbar
systems using one circuit breaker for selective short-circuit protection, time-
overcurrent protection, directional earth fault protection and automatic reclosing.
The configuration can be used in different types of networks such as 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 M02 on Section 10.3. Outgoing feeder,
Medium M02.
49F
3
3I > 50/51
I >
0
67N
3I >
2f
68
I >
46
0
I
79
CBFP
62
TCS
CBCM
3I
I
0
U
0
0
I
MCS
3I~harm
000
R
REX 521 M02
LO
86