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1MRS751802-MUM
REX 521
157
Protection Relay
Technical Reference Manual, Standard Configurations
Fig. 9.3.1.-2
Connection overview diagram of the incoming feeder
RE
X
521
CB
DC
1
0
0
1
Ove
rvi
e
wT
ra
n
s
Circuit-breaker failure
protection
TRIP circuit breaker
CLOSE circuit breaker
Internal relay fault
OC blocking signal from
the MV relay to the 3I>> stage
Summary of Contents for REX 521
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