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System Manual – MOVITRAC® 07
Load capacity of the units at low output frequencies
Project Planning
5.7
Load capacity of the units at low output frequencies
The thermal model in MOVITRAC
®
07 implements dynamic limiting of the maximum out-
put current. Consequently, the thermal model only permits less than 100 % output cur-
rent at output frequencies less than 2 Hz if the capacity utilization is high.
This can occur in the case of:
•
Electrically stopping hoists
•
Torque control at low speeds or when stopped
In such operating states, configure the average output current of the inverter to max. 70
% of the rated current of the inverter.
Guaranteed continuous currents depending on the output frequency
04991BXX
Figure 46: Continuous output currents at low output frequencies
