Danfoss VLT AQUA FC 202 - Page 104

Max.I
out
(%)
at T
AMB, MAX
A
Altitude (km)
enclosure
B and C
enclosure
T
at 100% I
out
D
100%
91%
82%
0 K
-5 K
-9 K
1 km
2 km 3 km
0 K
-3.3 K
-6 K
e30ba418.11
AMB, MAX
(K)
Illustration 57: Derating of Output Current versus Altitude at T
AMB,MAX
for Enclosure Sizes A, B, and C
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
e30
bt866.10
AMB, MAX
Illustration 58: Derating of Output Current Based on Altitude at T
AMB,MAX
At altitudes above 2000 m (6561 ft), contact Danfoss regarding PELV.
Alternatively, lower the ambient temperature at high altitudes and thereby ensure 100% output current at high altitudes. As an ex-
ample of how to read the graph, the situation at 2000 m (6561 ft) is elaborated for an enclosure size B with T
AMB,MAX
= 50 °C (122 °F).
Either the output current has to be reduces to 91% at T
AMB,MAX
, or the maximum temperature has to be reduced by 3.3 K at 100%
I
out
. This means that 100% of the rated output current is available at 41.7 °C (107 °F) continuous and 46.7 °C (116 °F) intermittent.
AJ300847815559en-000101 / 130R0337104 | Danfoss A/S © 2020.09
Mechanical Installation
Considerations
VLT® AQUA Drive FC 202
Design Guide