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6 Programming Features
131
Example for 200 V Class Motors
Cooling Effect
Torque Characteristics
Electronic
Thermal Over-
load
Effective when
operated at
50/60 Hz from
commercial
power supply
Base Frequency 60 Hz
(V/f for 50 Hz, 220 V Input Voltage)
For low-speed operation, torque
must be limited in order to stop mo-
tor temperature rise.
An
er-
ror (motor over-
load protection)
occurs when
continuously
operated at 50/
60 Hz or less at
100% load.
Effective even
when operat-
ed at low
speed (ap-
prox. 6 Hz)
Base Frequency 60 Hz
(V/f for 50 Hz, 220 V Input Voltage)
Use an Inverter motor for continuous
operation at low speed.
Electronic ther-
mal overload
protection is
not activated
even for contin-
uous operation
at 50/60 Hz or
less at a 100%
load.
General-purpose
Torque
(%)
60 s
Short-term
Continuous
rating
Operation Frequency (Hz)
50
Inverter Motor
Torque
(%)
60 s
Short-term
Continuous
rating
Operation Frequency (Hz)
50