Hitachi Relion 670 Series Communication Protocol Manual page 50

Section 5
Glossary
CCVT
Class C
CMPPS
CMT
CO cycle
Codirectional
COM
COMTRADE
Contra-directional
COT
CPU
CR
CRC
CROB
CS
CT
CU
CVT or CCVT
DAR
DARPA
DBDL
DBLL
DC
DFC
DFT
DHCP
DIP-switch
DI
DLLB
DNP
DR
DRAM
DRH
DSP
44
Capacitive Coupled Voltage Transformer
Protection Current Transformer class as per IEEE/ ANSI
Combined megapulses per second
Communication Management tool in PCM600
Close-open cycle
Way of transmitting G.703 over a balanced line. Involves two twisted pairs
making it possible to transmit information in both directions
Command
Standard Common Format for Transient Data Exchange format for Disturbance
recorder according to IEEE/ANSI C37.111, 1999 / IEC 60255-24
Way of transmitting G.703 over a balanced line. Involves four twisted pairs, two
of which are used for transmitting data in both directions and two for
transmitting clock signals
Cause of transmission
Central processing unit
Carrier receive
Cyclic redundancy check
Control relay output block
Carrier send
Current transformer
Communication unit
Capacitive voltage transformer
Delayed autoreclosing
Defense Advanced Research Projects Agency (The US developer of the
TCP/IP protocol etc.)
Dead bus dead line
Dead bus live line
Direct current
Data flow control
Discrete Fourier transform
Dynamic Host Configuration Protocol
Small switch mounted on a printed circuit board
Digital input
Dead line live bus
Distributed Network Protocol as per IEEE Std 1815-2012
Disturbance recorder
Dynamic random access memory
Disturbance report handler
Digital signal processor
© 2017 - 2023 Hitachi Energy. All rights reserved
1MRK511391-UUS Rev. L
DNP, 670 series
Communication protocol manual