ABB REX 521 - Page 134

134
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
Fig. 9.1.1.-2 Connection overview diagram of the outgoing feeder
REX 521
CB
DC ES
1
0
0 1
Breaker wear alarm
Circuit-breaker failure
protection
Blocking signal to the incoming
feeder (START 3I>>)
TRIP circuit breaker
CLOSE circuit breaker
Blocking signal from
the residual voltage relay
to the Io>
Internal relay fault
OverviewOutg
*) Power flow direction