Term Description
ER Engineering Recommendation
FCB Frame Count Bit
FFT Fast Fourier Transform
FIR Finite Impulse Response
FLC Full load current: The nominal rated current for the circuit.
FLT / Flt Fault - typically used to indicate faulted phase selection.
Fn or FN Function
FPGA Field Programmable Gate Array
FPS Frames Per Second
FTP File Transfer Protocol
FWD, Fwd or Fwd. Indicates an element responding to a flow in the "Forward" direction
GIF Graphic Interchange Format – a file format for a computer graphic
GND / Gnd Ground: used in distance settings to identify settings that relate to ground (earth) faults.
GOOSE Generic Object Oriented Substation Event
GPS Global Positioning System
GRP / Grp Group. Typically an alternative setting group.
GSE General Substation Event
GSSE Generic Substation Status Event
GUI Graphical User Interface
HMI Human Machine Interface
HIF High Impedance Fault
HiZ High Impedance (for Restricted Earth Fault)
HSR High-availability Seamless Ring
HTML Hypertext Markup Language
I
Current
I/O Input/Output
I/P Input
ICAO International Civil Aviation Organization
ID Identifier or Identification. Often a label used to track a software version installed.
IDMT
Inverse Definite Minimum Time. A characteristic whose trip time depends on the measured input
(e.g. current) according to an inverse-time curve.
IEC International Electro-technical Commission
IED Intelligent Electronic Device
IEEE Institute of Electrical and Electronics Engineers
IIR Infinite Impulse Response
Inh An Inhibit signal
Inst An element with Instantaneous operation: i.e. having no deliberate time delay.
IP Internet Protocol
IRIG InterRange Instrumentation Group
ISA International Standard Atmosphere
ISA Instrumentation Systems and Automation Society
ISO International Standards Organization
JPEF Joint Photographic Experts Group – a file format for a computer graphic
L Live
Appendix A - Symbols and Glossary MiCOM P747
410 P747-TM-EN-1
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