Section 11
Glossary
M14893-1 v6
AC
Alternating current
ACT
Application configuration tool within PCM600
A/D converter
Analog-to-digital converter
ADBS
Amplitude deadband supervision
AI
Analog input
ANSI
American National Standards Institute
AR
Autoreclosing
ASCT
Auxiliary summation current transformer
ASD
Adaptive signal detection
AWG
American Wire Gauge standard
BI
Binary input
BOS
Binary outputs status
BR
External bistable relay
BS
British Standards
CAN
Controller Area Network. ISO standard (ISO 11898) for serial
communication
CB
Circuit breaker
CCITT
Consultative Committee for International Telegraph and Telephony. A
United Nations-sponsored standards body within the International
Telecommunications Union.
CCVT
Capacitive Coupled Voltage Transformer
Class C
Protection Current Transformer class as per IEEE/ ANSI
CMPPS
Combined megapulses per second
CMT
Communication Management tool in PCM600
CO cycle
Close-open cycle
Codirectional
Way of transmitting G.703 over a balanced line. Involves two twisted
pairs making it possible to transmit information in both directions
COMTRADE
Standard format according to IEC 60255-24
Contra-directional
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
CPU
Central processor unit
CR
Carrier receive
CRC
Cyclic redundancy check
CROB
Control relay output block
CS
Carrier send
CT
Current transformer
CVT
Capacitive voltage transformer
DAR
Delayed autoreclosing
1MRK 514 014-UEN A
Section 11
Glossary
650 series
51
Installation manual
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