4-17
Base frequency
Base frequency and motor voltage
AVR function
(1) Base frequency and motor voltage
On selection of base frequency and motor voltage, set the output of the inverter (frequency voltage) to the
motor rating.
The Base frequency is the nominal frequency of the motor, this value can be found on the nameplate of the
motor. It is important to match the Base frequency (A003) to this nominal value or there is risk of damage to the
motor.
If a motor has a base frequency higher than 60Hz, it is considered to be a special motor. In this situation, it is
important to make sure the maximum output current of the inverter is higher than the FLC of the motor.
The Motor Voltage Selection is the nominal voltage of the motor, this value can be found on the nameplate of
the motor. It is important to match the Motor Voltage (A082) to this nominal value or there is risk of damage to
the motor.
When changing second base frequency (A203) an intelligent input terminal must be set to 08(SET) and
switched on.
Set item
Function code
Setting limit
Contents
Base frequency
A003/A203
30.-1
st
/2
nd
maximum
frequency
Unit:Hz
200/215/220/230/240
Unit:V When inverter is 200V class,
selection is possible.
Motor voltage
selection
A082
380/400/415/440/460/480
Unit:V When inverter is 400V class,
selection is possible.
(2) AVR function
Even if the incoming voltage changes, this function will keep the output voltage and a constant voltage level.
The output voltage to the motor in this function references to the voltage selected on motor voltage selection.
Select Yes/No of this function on A081 AVR selection.
Function
code
Data
Contents
Description
00
Always ON
This function is effective on acceleration, constant speed, deceleration.
01
Always OFF
This function is ineffective on acceleration,constant speed,
deceleration.
A081
02
On
decelerating
OFF
This increases a loss of motor and reduces the energy regenerated to
inverter on decelerating.
Chapter4 Explanation of function
A003/A203: 1
st
/2
nd
base frequency
A081: AVR selection
A082: Motor voltage selection
Relation code
Output voltage
Motor voltage
selection(%)
Output frequency (Hz)
Base frequency
