SEW-Eurodrive MOVITRAC 07, Системное руководство

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System Manual – MOVITRAC® 07
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Overload capacity
Project Planning
5.6 Overload capacity
MOVITRAC
®
07 frequency inverters permanently calculate the load on the inverter out-
put stage (unit utilization). They can output the maximum possible power in any operat-
ing status. The permitted continuous output current depends on the ambient tempera-
ture, heat sink temperature, supply voltage and PWM frequency. The inverter reacts to
a higher than permitted load by outputting the
F-44 Unit utilization
fault message and
performing an immediate switch-off.
The following diagrams show the temperature/time characteristic of the units. The in-
verter automatically reduces its switching frequency if a certain switching frequency
reaches the corresponding limit characteristic curve.
04977BXX
Figure 44: Overload capacity at 40 °C
04978BXX
Figure 45: Overload capacity at 25 °C
Size 0S 0M 0L 1 2S 2 3 4
T (min) 10 23 3 3.5 4 5 4 9