Danfoss VLT Midi Drive FC 280 Design Guide

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K4 Derating Curve
Switching Frequency [kHz]
Output Current
45C
50C
55C
130BE892.10
Illustration 7.6 K4 Derating Curve
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K5 Derating Curve
Switching Frequency [kHz]
Output Current
45C
50C
55C
130BE893.10
Illustration 7.7 K5 Derating Curve
7.12.2 Automatic Derating
The frequency converter constantly checks for critical
levels:
•
Critical high temperature on the heat sink.
•
High motor load.
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Low motor speed.
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Protection signals (overvoltage/undervoltage,
overcurrent, ground fault, and short circuit) are
triggered.
As a response to a critical level, the frequency converter
adjusts the switching frequency.
Specications Design Guide
MG07B102 Danfoss A/S © 03/2016 All rights reserved. 85
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Danfoss VLT Midi Drive FC 280 Specifications

General

Brand	Danfoss
Model	VLT Midi Drive FC 280
Category	DC Drives
Language	English