User Manual Instruction Manual

13-14 GV6000 AC Drive User Manual
Operation below 100% current causes the temperature calculation to account for
motor cooling.
Motor OL Hertz (47) defines the frequency where motor overload capacity derate
should begin. The motor overload capacity is reduced when operating below Motor OL
Hertz (47). For all settings of Motor OL Hertz (47) other than zero, the overload
capacity is reduced to 70% at an output frequency of zero.
Motor NP FLA (42) is multiplied by Motor OL Factor (48) to select the rated current for
the motor thermal overload. This can be used to raise or lower the level of current that
will cause the motor thermal overload to trip. The effective overload factor is a
combination of Motor OL Hertz (47) and Motor OL Factor (48).
Motor Overload Curve
100 125 150 175 200 225 250
Full Load Amps (%)
Trip Time (Sec)
Cold
Hot
10
100
1000
10000
100000
Changing Overload Hz
0102030405060708090100
% of Base Speed
Continuous Rating
OL Hz = 10
OL Hz = 25
OL Hz = 50
0
20
40
60
80
100
120
Changing Overload Factor
0102030405060708090100
% of Base Speed
Continuous Rating
OL % = 1.20
OL % = 1.00
OL % = 0.80
0
20
40
60
80
100
120
140