Abbreviations - ABB RET 54 Series Technical Reference Manual, General

1MRS755225
9.
Transformer Terminal
Technical Reference Manual, General

Abbreviations

AI Analog Input
CB Circuit Breaker
CBFP Circuit Breaker Failure Protection
CPU Central Processing Unit
CT Current Transformer
DI Digital Input
DNP Distributed Network Protocol
DO Digital Output
EMC Electro-Magnetic Compatibility
GND Ground
HMI Human Machine Interface
HSPO High-Speed Power Output
IDMT Inverse Definite Minimum Time
I/O Input/Output
IEC_103 IEC 60870-5-103, communication protocol standardized by
International Electrotechnical Commission
IRF Internal Relay Fault
LCD Liquid-Crystal Display
LED Light-Emitting Diode
LON Local Operating Network
LonMark An independent world-wide industry association, which facilitates the
development and implementation of open, interoperable LonWorks
based control products and systems.
L/R Local/Remote
LV Low Voltage
MIMIC A graphic configuration picture on the LCD of a relay
MV Medium Voltage
NO/NC Normally Open/ Normally Closed
PCB Printed Circuit Board
PLC Programmable Logic Controller
PMT Protocol Mapping Tool
PO Power Output
PS Power Supply
RTD Resistance Temperature Device
SNVT Standard Network Variable Type
SO Signal Output
SMS Substation Monitoring System
SPA Data communication protocol developed by ABB
SPACOM An ABB product family
TCR Thermal Coefficient of Resistance
TCS Trip Circuit Supervision
TLT Transformer Linearization Tool
VT Voltage Transformer
RET 54_
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