Frequency-Dependent Maximum Current (Ol2) - KEB COMBIVERT F6 Instructions For Use Manual

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UNIT DATA OF THe 400V UNITS

Operation in the range of the thermal overload limit

Due to the high steepness of the overload characteristic, the duration of a permissible

overload in this range cannot be determined exactly. Therefore, the design of the drive

converter should be assumed to have a maximum overload time of 300 s.

3.2.3.2 Frequency-dependent maximum current (OL2)

The characteristics of the maximum currents for a switching frequency which are de-

pending on the output frequency are different for each drive converter, but the following

rules are generally applicable:

•

If error (OL2) shall be triggered on exceeding the maximum currents or if the switching

frequency is automatically reduced (derating) can be adjusted in the drive converter

parameters.

Applies for the rated switching frequency: at 0 Hz output frequency the drive convert-

er can provide at least the rated output current.

Lower maximum currents apply for switching frequencies > rated switching frequency.

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