Danfoss VLT AutomationDrive FC 361 Series Design Manual page 38

Mechanical Installation Con...
6.6.2 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
Illustration 6.2.
6 6
Illustration 6.2 Derating of Output Current Based on Altitude at T
Illustration 6.2 shows that at 41.7 °C (107 °F), 100% of the rated output current is available. At 45 °C (113 °F) (T
K), 91% of the rated output current is available.
36
VLT® AutomationDrive FC 361
) or maximum output current (I
AMB
Max.I (%)
out
at T
AMB, MAX
100%
96%
92%
1 km 2 km
AMB
Danfoss A/S © 03/2019 All rights reserved.
) should be derated. Refer to
MAX
T
AMB, MAX
at 100% I
out
HO NO
0 K -5 K
-3 K -8 K
-6 K -11 K
3 km
Altitude (km)
,
MAX
, MAX-3
AMB
MG06K102