KEB COMBIVERT F5, Reference Manual, Page: 39 / 349

39
Overload Curves
30
60
90
120
150
180
210
240
270
300
0 105 110 115 120 125 130 135 140 145 150 160 170 180 190 200

Less than size 24
Time [s]
Load [%]

Size 24 and greater
Time [s]
Load [%]
If the load current exceeds the rated current but is below the overcurrent level, an overload
timer begins counting. The rate at which the timer increments is a function of load current.
The higher the current, the faster the increments. When the counter reaches the limit, the
Error Overload (E.OL) fault is triggered and the output to the motor is shut off. At this point,
the inverter begins a cool-down period where the inverter is allowed to cool before the fault
can be reset. When the drive displays a No Error Overload (E.nOL) message, the inverter
has reached an acceptable temperature level and can be restarted.
The overload curves are
dependent on the inverter
housing size.
30
60
90
120
150
180
210
240
270
300
0 105 110 115 120 125 130 135 140 145 150
2.9 Time dependent overload curve