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1MRS 752179-MUM
9.
Earth-Fault Relay
Operator's Manual
Abbreviations
CBFP
Circuit-breaker failure protection
CPU
Central processing unit
IDMT
Inverse definite minimum time characteristic
IRF
Internal relay fault
LCD
Liquid Crystal Display
LED
Light-emitting diode
HMI
Human-Machine Interface
SGB
Switchgroups for binary input
SGF
Switchgroups for functions
SGR
Switchgroups for output contacts
REJ 521
35
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