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COMTRADE
Standard Common Format for Transient Data Exchange format
for Disturbance recorder according to IEEE/ANSI C37.111,
1999 / IEC60255-24
COT
Cause of transmission
CPU
Central processing unit
CR
Carrier receive
CRC
Cyclic redundancy check
CROB
Control relay output block
CS
Carrier send
CT
Current transformer
CU
Communication unit
CVT or CCVT
Capacitive voltage transformer
DAR
Delayed autoreclosing
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
DFC
Data flow control
DFT
Discrete Fourier transform
DHCP
Dynamic Host Configuration Protocol
DI
Digital input
DLLB
Dead line live bus
DNP
Distributed Network Protocol as per IEEE Std 1815-2012
DR
Disturbance recorder
DRAM
Dynamic random access memory
DRH
Disturbance report handler
DTT
Direct transfer trip scheme
EHV network
Extra high voltage network
EIA
Electronic Industries Association
EMC
Electromagnetic compatibility
EMF
Electromotive force
Section 9
1MRK 505 293-UUS A
Glossary
134
Commissioning manual