Abbreviations - ABB REJ 525 Operator's Manual

REJ 525
9.
36
Combined Overcurrent and 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 Switchgroup for binary input
SGF Switchgroup for functions
SGR Switchgroup for output contacts
1MRS 752137-MUM