Table 21: EMC Emission Test Results
RFI filter
type
Conduct emission. Maximum shielded cable length [m
(ft)]
Radiated emission
EN
55011
Class A Group 2
Industrial envi-
ronment
Class A Group 1
Industrial envi-
ronment
Class B
Housing, trades,
and light indus-
tries
Class A Group 2
Industrial envi-
ronment
Class A Group 1
Industrial envi-
ronment
Class B
Housing, trades,
and light indus-
tries
EN/IEC
61800-3
Category C3
Second environ-
ment Industrial
Category C2
First environ-
ment Home and
office
Category C1
First environ-
ment Home and
office
Category C3
Second environ-
ment Industrial
Category C2
First environ-
ment Home and
office
Category C1
First environ-
ment Home and
office
With‐
out ex‐
ternal
filter
With
exter‐
nal
filter
With‐
out ex‐
ternal
filter
With
exter‐
nal
filter
With‐
out
exter‐
nal fil‐
ter
With
exter‐
nal
filter
With‐
out
exter‐
nal fil‐
ter
With
exter‐
nal
filter
With‐
out
exter‐
nal fil‐
ter
With
exter‐
nal
filter
With‐
out
exter‐
nal fil‐
ter
With
exter‐
nal
filter
H4 RFI filter (EN 55011 A1, EN/IEC61800-3 C2)
6.0– 10
kW (8.0–
15 hp)
3x200–
240 V
IP20
–
–
25 (82)
50
(164)
–
20
(66)
–
–
Yes
Yes
–
No
H2 RFI filter (EN 55011 A2, EN/IEC 61800-3 C3)
18–30 kW
(25– 40
hp)
3x380–
480 V
IP20
5 (16.4)
–
–
–
–
–
Yes
–
No
–
No
–
6.4 Special Conditions
6.4.1 Derating for Ambient Temperature and Switching Frequency
Ensure that the ambient temperature measured over 24 hours is at least 5 °C (41 °F) lower than the maximum ambient temperature
that is specified for the drive. If the drive is operated at a high ambient temperature, decrease the constant output current. For derating
curve, see the VLT® Compressor Drive CDS 803 Design Guide.
6.4.2 Derating for Low Air Pressure and High Altitudes
The cooling capability of air is decreased at low air pressure. For altitudes above 2000 m (6562 ft), contact Danfoss regarding PELV.
Below 1000 m (3281 ft) altitude, derating is not necessary. For altitudes above 1000 m (3281 ft), decrease the ambient temperature or
the maximum output current. Decrease the output by 1% per 100 m (328 ft) altitude above 1000 m (3281 ft) or reduce the maximum
ambient temperature by 1 °C (33.8 °F) per 200 m (656 ft).
Specifications
Operating Guide | VLT® Compressor Drive CDS 803
AQ321748767627en-000101 / 130R0570| 45
Danfoss A/S © 2019.12
Summary of Contents for VLT CDS 803
Page 1: ...Operating Guide VLT Compressor Drive CDS 803...
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