ABB REX 521 - Test Mode Operations; I;O and IRF Testing Procedures

1MRS751802-MUM
REX 521
27
Protection Relay
Technical Reference Manual, Standard Configurations
B02
Fig. 3.1.2.1.-1 Block diagram of the standard configuration B02
3.1.2.2. Application
The B02 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, earth fault protection and automatic reclosing. The
configuration can be used in different types of networks such as 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 B02 on Section 9.4. Outgoing feeder, Basic
B02.
49F
3
3I > 50/51
I >
0
50N/51N
3I >
2f
68
I >
46
0
I
79
CBFP
62
TCS
CBCM
3I
I
0
0
I
MCS
3I~harm
000
R
REX 521 B02
LO
86