Instruction manual

• General-purpose motor and inverter motor
Induction motors are classified as general-purpose motors or inverter
motors, based on their cooling capabilities. Therefore, the motor overload
function operates differently between these two motor types.
Example of 200V class motor
88
General-purpose MotorInverter Motor
Cooling Effect Torque Characteristics
Electronic Thermal
overload
Effective when
operated at
50/60Hz from
commercial
power supply.
Effective even
when operated at
low speed
(approx. 6Hz)
Base Frequency 60Hz
(V/f for 60Hz, 220V Input Voltage)
For low-speed operation, torque
must be limited in order to stop
motor temperature rise.
Base Frequency 60Hz
(V/f for 60Hz, 220V Input Voltage)
Use an inverter motor for
continuous operation at low speed.
“OL1 ” error (motor
overload protection)
occurs when
continuously
operated at 50/60Hz
or less at 100% load.
Electronic thermal
overload protection
not activated even
when continuously
operated at 50/60Hz
or less at 100% load.
60 SEC
SHORT-TERM
CONTINUOUS
RATING
180
155
140
100
80
55
38
0
320 60 120
TORQUE
(%)
OPERATION FREQUENCY (Hz)
180
150
100
55
38
0
660120
TORQUE
(%)
OPERATION FREQUENCY (Hz)
60 SEC
SHORT-TERM
CONTINUOUS
RATING