Overload Characteristic (Ol); Figure 6: Switch-Off Time T Depending On The Overload I/In (Ol) With The Example Of Module A - KEB COMBIVERT T6APD Instructions For Use Manual

SYSTEM AND MODULE DATA

3.2.5.1 Overload characteristic (OL)

All drive inverters can be operated for 60 s at rated switching frequency with an utilization
according to the data from
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 6: Switch-off time t depending on the overload I/IN (OL) with the example of module A
On exceeding a load of 105 % the overload integrator starts. When falling below the
integrator counts backwards. If the integrator reaches the overload characteristic „Error!
overload (OL)" is triggered.
After a cooling down period, the integrator can be reset now. The drive inverter must
remain switched on during the cooling period.
„Table 13: Electrical data of the inverter modules"
The thermal design of the heat sink is based on the rated output 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 inverter can change to overtemperature error before triggering the protective
function OL.
At low output frequencies or switching frequencies higher than the rated switch-
ing frequency, the frequency-dependent maximum current can be exceeded before
and error OL2 can be triggered =>
(OL2)".
Overload characteristic (OC level 180%)
①
120 130 140
Motor current / drive inverter rated currrent / %
„3.2.5.2 Frequency-dependent maximum current
②
150 160 170
.
180
41