Vlt® Compressor Drive Cds 803 Features; Compressor Features; Secure Start-Up - Danfoss VLT CDS 803 Manual

VLT® Compressor Drive CDS 803
Design Guide
Table 3: Overview of VLT® Compressor Drive CDS 803 Family
Power [kW]
Electrical
Mains voltage [V]
Typical shaft output [hp]
Mechanical
Enclosure size
IP protection rating
(1)
Compliance
RFI filter
UL rating
All CDS 803 drives can be upgraded to IP21/NEMA Type 1 with an IP21/NEMA Type 1 Conversion Kit.
1
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
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.
12 | Danfoss A/S © 2021.05
P6K0 P7K5
3x200–240 3x200–240
3x380–480 3x380–480
8.0 10
H4 H4
H3 H3
IP20 IP20
H4 RFI filter
• EN 55011 A1
• EN/IEC 61800-3 C2
UL Listed
• UL 508C
P10K P18K
3x200–240 3x380–480
3x380–480
15 25
H5 H5
H4
IP20 IP20
H2 RFI filter
• EN 55011 A2
• EN/IEC 61800-3 C3
UL Recognized
• UL 60730-1
Product Overview
P22K P30K
3x380–480 3x380–480
30 40
H5 H6
IP20 IP20
AJ330233902305en-000201 / 130R0596
1.2