Danfoss VLT AutomationDrive FC 300 Design Guide

4.7.3 Automatic Derating
The adjustable frequency drive constantly checks for
critical levels:
•
Critical high temperature on the control card or
heatsink
•
High motor load
•
High DC link voltage
•
Low motor speed
As a response to a critical level, the adjustable frequency
drive adjusts the switching frequency. For critical high
internal temperatures and low motor speed, the adjustable
frequency drives can also force the PWM pattern to
SFAVM.
NOTICE!
The automatic derating is different when 14-55 Output
Filter is set to [2] Sine-Wave Filter Fixed.
Selection Design Guide
MG34S222 Danfoss A/S © Rev. 2014-02-10 All rights reserved. 89
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Danfoss VLT AutomationDrive FC 300 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300
Category	DC Drives
Language	English