65
9.
Abbreviations
Abbreviation
Description
ANSI
American National Standards Institute
AR
Auto reclosure
ASCII
American Standard Code for Information Interchange
CB
Circuit-breaker
CBFAIL
Circuit-breaker failure protection
CPU
Central processing unit
CT
Current transformer
DI
Digital input
HMI
Human-machine interface
IDMT
Inverse definite minimum time characteristic
IEC
International Electrotechnical Commission
IED
Intelligent electronic device
IRF
Internal relay fault
LCD
Liquid crystal display
LED
Light-emitting diode
PC
Personal computer
PO
Power output, process object
RTU
Remote terminal unit
SGB
Switchgroup for digital inputs
SGF
Switchgroup for functions
SGL
Switchgroup for LEDs
SGR
Switchgroup for output contacts
SO
Signal output
SPA
Data communication protocol developed by ABB
TCS
Trip-circuit supervision
Feeder Protection Relay
Operator's Manual - ANSI Version
REF 610
REF 610
1MRS755539