Overload Characteristic (Ol) For 400 V Devices; Figure 4: Turn-Off Time T Depending On The Overload I/In At Oc Level 216 - KEB COMBIVERT F6 Series Instructions For Use Manual

DeVIce DATA OF THe 400 V DeVIceS

3.3.3.1 Overload characteristic (OL) for 400 V devices

All drive converters with overload characteristic of 180 % or 216 % 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 4: Turn-off time t depending on the overload I/IN at OC level 216 %
42
The thermal design of the heat sink is based on the rated operation. The following
values are taken into account: Rated output current, ambient temperature, rated
switching frequency, rated voltage.
At high surrounding temperatures and/or high heat sink temperatures (for example,
by preceding utilization nearby 100%) the drive converter can change to overtem-
perature error before triggering the protective function OL.
At low output frequencies or switching frequencies higher than the rated switching fre-
quency, the frequency-dependent maximum current can be exceeded before and error
OL2 can be triggered (=> „Frequency-dependent maximum current (OL2) for 400V de-
vices").
Overload characteristic (OC level 216%)
①
120 130 140 150
Motor current / drive converter rated currrent / %
②
160 170 180 190 200 210