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9. Abbreviations
Abbreviation Description
CAN Controller area network
CB Circuit-breaker
CT Current transformer
DC Direct current
EMC Electromagnetic compatibility
GIS Gas insulated switchgear
GPS Global positioning system
HMI Human-machine interface
IDMT Inverse definite minimum time characteristic
LAG Lon application guide
LCD Liquid crystal display
LED Light-emitting diode
LON Local operating network
LV Low voltage
MC Micro controller
MV Medium voltage
RMS Root mean square
RTU Remote terminal unit
SLD Single-line diagram
SPA Data communication protocol developed by ABB
ST Straight-tip; a connector type for fibre optic cable
TCP Transmission Control Protocol
VDEW Association of German Electrical Utilities
VDN Association of German Electrical Utilities
VT Voltage transformer
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
REF 542plusREF 542plus
1MRS755859
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