Overload Characteristic (Ol); Figure 1: Switch-Off Time T Depending On The Overload I/In (Ol) - KEB COMBIVERT F6 Instructions For Use Manual

UNIT DATA OF THe 400V UNITS

3.2.3.1 Overload characteristic (OL)

All drive converters of housing size 6 can be operated at rated switching frequency with
an utilization of 150 % for 60 s.
Restrictions:
•
•
300
270
240
210
180
150
120
90
60
30
0
110
Figure 1: Switch-off time t depending on the overload I/IN (OL)
On exceeding a load of 105 % the overload integrator starts. When falling below the inte-
grator counts backwards. If the integrator achieves the overload characteristic „ERROR
module overload (I²t)" is triggered.
After a cooling period the message „Reset ERROR module overload (I
The error can be reset now. The drive converter must remain switched on during the
cooling period.
The thermal design of the heat sink is based on the rated current and the maximum
surrounding temperature. At high surrounding temperatures and/or high heat sink
temperatures (for example, by preceding utilization nearby 100%) the drive convert-
er can change to overtemperature 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
Overload characteristic (OC Level 180%)
120 130 140
Motor current / drive converter rated current in %
(=> 3.2.3.2).
30
25
20
15
10
5
0
155 160 165 170
150 160
175 180
170 180
t)" is displayed.
2
31