Danfoss VLT CDS 803 User Manual

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Speed
Speed
Start
speed
Start-up sequence
Time
Time
Compressor
start minimum
speed
A18, Start
failed
Compressor start
maximum time to trip
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Illustration 2: Compressor Start-up Sequence
3.2.1.2 Compressor Minimum Speed Detection
To avoid a malfunction inside the compressor due to missing or low lubrication the VLT® Compressor Drive CDS 803 protects the
compressor if the speed drops below the minimum speed detection limit for too long.
In case of excessive low speed the drive issues Alarm 49, Speed limit.
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Speed
Motor speed
low limit
Compressor
minimum
speed for trip
Minimum
speed
detection
timer start
Illustration 3: Minimum Speed Detection
AJ330233902305en-000201 / 130R0596 | 13Danfoss A/S © 2021.05
Product Overview
VLT® Compressor Drive CDS 803
Design Guide

Danfoss VLT CDS 803 Specifications

General

Brand	Danfoss
Model	VLT CDS 803
Category	DC Drives
Language	English