Overload Characteristic (Ol); Figure 3: Switch-Off Time T Depending On The Overload I/In At Oc Level 180% (Ol) - KEB COMBIVERT F6 Series Instructions For Use Manual

DeVIce DATA OF THe 400 V DeVIceS

3.2.3.1 Overload characteristic (OL)

All drive controllers can be operated at rated switching frequency with an utilization of
150 % for 60 s.
Restrictions:
•
•
•
500
400
300
270
240
210
180
150
120
90
60
30
0
110
Legend
① Thermal overload limit
② Limitation by the software current limit (the limit can be set with parameter is35)
Figure 3: Switch-off time t depending on the overload I/IN at OC level 180% (OL)
•
•
•
After a cooling down period, the integrator can be reset now. The drive controller must
remain switched on during the cooling down phase.
34
The thermal design of the heat sinks is based for rated operation. The following
values, among others, are taken into account: rated output current, ambient temper-
ature, rated switching frequency, rated voltage.
At high ambient temperatures and/or high heat sink temperatures (for example, by
preceding utilization nearby 100%) the drive controller can change to overtempera-
ture error before triggering the protective function OL.
At low output frequencies or switching frequencies higher than the rated switching
frequency, the frequency-dependent maximum current can be exceeded before
and error OL2 can be triggered =>
rent (OL2)".
Overload characteristic (OC level 180%)
①
120 130 140
Motor current / drive controller rated currrent / %
On exceeding a load of 105 % the overload integrator starts.
When falling below the integrator counts backwards.
If the integrator achieves the overload characteristic „ERROR overload (OL)" is trig-
gered.
„3.2.3.2 Frequency-dependent maximum cur-
②
150 160 170 180