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Table 3: Overview of VLT® Compressor Drive CDS 803 Family
Typical shaft output [hp]
H4 RFI filter
EN 55011 A1
EN/IEC 61800-3 C2
H2 RFI filter
EN 55011 A2
EN/IEC 61800-3 C3
1
All CDS 803 drives can be upgraded to IP21/NEMA Type 1 with an IP21/NEMA Type 1 Conversion Kit.
3.2 VLT® Compressor Drive CDS 803 Features
Various application functions are programmed in the drive for enhanced system performance. The functions require minimum pro-
gramming or setup. For activation of the functions, refer to the VLT® Compressor Drive CDS 803 Programming Guide listed in 1.2
Additional Resources.
3.2.1 Compressor Features
The VLT® Compressor Drive CDS 803 offers various specialized functions for use in combination with compressor systems.
3.2.1.1 Secure Start-up
To ensure that the compressor ramps fast to the defined start speed, the VLT® Compressor Drive CDS 803 always runs a start-up
sequence. The compressor runs at the start speed for a defined fixed time.
If a locked rotor or flooded compressor occurs, it is detected during start-up.
If the drive fails to start the compressor, it trips on Alarm 18, Start failed.
AJ330233902305en-000201 / 130R059612 | Danfoss A/S © 2021.05
Product Overview
VLT® Compressor Drive CDS 803
Design Guide
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