Acoustic Noise - Danfoss VLT HVAC Basic Drive FC 100 Series Design Manual

General Specifications and ...
All inputs, outputs, circuits, DC supplies and relay contacts are galvanically isolated from the supply voltage (PELV) and
other high-voltage terminals.
Surroundings
Enclosure
Enclosure kit available
Vibration test
Max. relative humidity
Aggressive environment (IEC 60721-3-3), coated (standard) frame H1-H5
Aggressive environment (IEC 60721-3-3), non-coated frame H6-H10
Aggressive environment (IEC 60721-3-3), coated (optional) frame H6-H10
Test method according to IEC 60068-2-43 H2S (10 days)
Ambient temperature
Derating for high ambient temperature, see section on special conditions
Minimum ambient temperature during full-scale operation
Minimum ambient temperature at reduced performance, enclosure frame H1-H5
Minimum ambient temperature at reduced performance, enclosure frame H6-H10
Temperature during storage/transport
Maximum altitude above sea level without derating
8 8
Maximum altitude above sea level with derating
Derating for high altitude, see section on special conditions
Safety standards
EMC standards, Emission
EMC standards, Immunity

8.3 Acoustic Noise

The acoustic noise from the frequency converter comes
from 3 sources:
1. DC intermediate circuit coils
2. Integral fan
3. RFI filter choke
The typical values measured at a distance of 1m from the
unit:
Frame
H1
H2
H3
H4
H5
H6
H7
H8
88
VLT HVAC Basic Drive Design Guide
5% - 95% (IEC 60721-3-3; Class 3K3 (non-condensing) during operation
EN 61800-3, EN 61000-6-1/2, EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5, EN
Level [dBA]
57.3
59.5
53.8
64
63.7
63.2
67.5 (75kW 71.5 dB)
71.4
®
MG.18.C2.02 - VLT
See max. output current at 40/50°C in the tables mains supply
EN 61800-3, EN 61000-6-3/4, EN 55011, IEC 61800-3
is a registered Danfoss trademark
IP20
IP21, TYPE 1
1.0g
Class 3C3
Class 3C2
Class 3C3
0°C
-20°C
-10°C
-30 - +65/70°C
1000m
3000m
EN/IEC 61800-5-1, UL 508C
61000-4-6