ABB Relion 650 Series Commissioning Manual page 102

Section 7
Glossary
94
CT Current transformer
CVT Capacitive voltage transformer
DAR Delayed auto-reclosing
DARPA Defense Advanced Research Projects Agency (The US
developer of the TCP/IP protocol etc.)
DBDL Dead bus dead line
DBLL Dead bus live line
DC Direct current
DFT Discrete Fourier transform
DIP-switch Small switch mounted on a printed circuit board
DLLB Dead line live bus
DNP Distributed Network Protocol as per IEEE/ANSI Std.
1379-2000
DR Disturbance recorder
DRAM Dynamic random access memory
DRH Disturbance report handler
DSP Digital signal processor
DTT Direct transfer trip scheme
EHV network Extra high voltage network
EIA Electronic Industries Association
EMC Electro magnetic compatibility
EMF Electro motive force
EMI Electro magnetic interference
EnFP End fault protection
ESD Electrostatic discharge
FOX 20 Modular 20 channel telecommunication system for speech,
data and protection signals
FOX 512/515 Access multiplexer
FOX 6Plus Compact, time-division multiplexer for the transmission of
up to seven duplex channels of digital data over optical fibers
G.703 Electrical and functional description for digital lines used by
local telephone companies. Can be transported over balanced
and unbalanced lines
GCM Communication interface module with carrier of GPS
receiver module
GDE Graphical display editor within PCM600
1MRK 511 209-UEN -
REC650
Commissioning Manual