Danfoss VLT AQUA Drive FC 202 Design Manual

9.6.2 Derating for Altitude
The cooling capability of air is decreased at lower air
pressure. No derating is necessary at or below 1000 m
(3281 ft). Above 1000 m (3281 ft), the ambient
temperature (T
AMB
) or maximum output current (I
MAX
)
should be derated. Refer to Figure 9.2.
Max.I
out
(%)
at T
AMB, MAX
Altitude (km)
HO
NO
T
at 100% I
out
100%
96%
92%
0 K
-3 K
-6 K
1 km 2 km 3 km
-5 K
-8 K
-11 K
130BT866.10
AMB, MAX
Figure 9.2 Derating of Output Current Based on Altitude at
T
AMB
,
MAX
Figure 9.2 shows that at 41.7 °C (107 °F), 100% of the rated
output current is available. At 45 °C (113 °F) (T
AMB
, MAX-3
K), 91% of the rated output current is available.
Mechanical Installation Con... Design Guide
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Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English