ABB UNITROL 1020 - Terms and Abbreviations


UNITROL 1020 User Manual 3BHS335648 E82 vii
Terms and Abbreviations
AC
Alternating Current
AIO
Analog Input and Output
AUTO
Automatic Voltage Regulation (Auto Mode)
AVR
Automatic Voltage Regulator
Bat
Battery
CAN
Controller-area network
CB
Circuit Breaker
MAIN
Main Channel in double channel systems.
CT
Current Transformer
DC
Direct Current
DIO
Digital Input and Output
ESD
Electrostatic Discharge
ETH
Ethernet Terminal
EXC
Excitation
FCB
Field Circuit Breaker
GEN
Generator
GFR
Ground Fault Relay (Rotor Ground Fault Protection)
HW
Hardware
IGBT
Insulated Gate Bipolar Transistor
MANUAL
Field Current Regulation (Manual Mode)
MCU
Microcontroller unit
PC
Personal Computer
PCB
Printed Circuit Board
PDF
Portable Document Format
PE
Protective Earth (Protective Ground)
PF
Power Factor Mode
PPE
Personal Protective Equipment
PS
Power Supply
PSS
Power System Stabilizer
PT
Potential Transformer
PWM
Pulse Width Modulation
Q
Reactive Power
RDM
Rotating Diode Monitoring
SW
Software
UMAUX
UM Auxiliary Input Measurement
VAR
Reactive Power Mode
V/Hz
Volt per Hertz (-Limiter)
VDC
Voltage Droop Compensation
VM
Voltage Matching