Danfoss VLT AQUA Drive Operating Instructions Manual page 154

10. Specifications
10.2.5. Derating for Installing Long Motor Cables or Cables with Larger Cross-Section
The maximum cable length for this frequency converter is 300 m unscreened and 150 m screened cable.
The frequency converter has been designed to work using a motor cable with a rated cross-section. If a cable with a larger cross-section is used, reduce
the output current by 5% for every step the cross-section is increased.
(Increased cable cross-section leads to increased capacity to earth, and thus an increased earth leakage current).
10.2.6. Automatic adaptations to ensure performance
The frequency converter constantly checks for critical levels of internal temperature, load current, high voltage on the intermediate circuit and low motor
speeds. As a response to a critical level, the frequency converter can adjust the switching frequency and / or change the switching pattern in order to
ensure the performance of the frequency converter. The capability to automatically reduce the output current extends the acceptable operating conditions
even further.
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MG.20.M4.02 - VLT is a registered Danfoss trademark
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VLT AQUA Drive
Operating Instructions