185
Glossary
Chapter 14
Glossary
Contra-directional
Way of transmitting G.703 over a balanced line. Involves four twisted
pairs of with two are used for transmitting data in both directions, and
two pairs for transmitting clock signals
CPU
Central Processor Unit
CR
Carrier Receive
CRC
Cyclic Redundancy Check
CS
Carrier send
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
DR
Disturbance Recorder
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
EMI
Electro magnetic interference
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
FXM
IEC 61850, Optical Ethernet Card
G.703
Electrical and functional description for digital lines used by local tele-
phone companies. Can be transported over balanced and unbalanced
lines
G.711
Standard for pulse code modulation of analog signals on digital lines
GCM
Communication interface module with carrier of GPS receiver module
Summary of Contents for RELION REL670
Page 8: ...Contents ...
Page 72: ...64 About this chapter Chapter 9 Establishing connection and verifying the LON communication ...
Page 174: ...166 Remote communication Chapter 11 Verifying settings by secondary injection ...
Page 190: ...182 Maintenance Chapter 13 Fault tracing and repair ...
Page 198: ...190 Glossary Chapter 14 Glossary ...