4-176
08-07=2:
Figure 4.4.61 Motor overload protection curve (example: standard motor)
When using force cooled motors (Special inverter motor), thermal characteristics are independent of the
motor speed, set 08-05 = x1xxb.
When 08-05 = x1xxb, overload protection function is based on motor rated current for output frequencies
between 6 and 60Hz. If the output frequency is lower than 1Hz, the overload protection function uses 83%
of the motor rated current to determine an overload condition.
When 08-05 = x0xxb, overload protection function is based on 70% of the motor rated current for an output
frequency of 20Hz. If the output frequency is lower than 1Hz, the overload protection function uses 40% of
the motor rated current to determine an overload condition.
Refer to Fig.4.4.62 for motor overload rating at different output frequencies.
Figure 4.4.62 Motor overload rating at different output frequencies
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