Danfoss VLT AQUA Drive FC 202 Design Manual page 73

Mechanical Installation Con...
No derating is necessary at or below 1000 m (3281 ft). Above 1000 m (3281 ft), the ambient temperature (T
maximum output current (I
MAX
Max.I (%)
out
at T
AMB, MAX
100%
96%
92%
1 km 2 km
Illustration 9.2 Derating of Output Current Based on Altitude at T
Illustration 9.2 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.
9.6.3 Derating for Ambient Temperature and Switching Frequency
NOTICE
FACTORY DERATING
Danfoss drives are already derated for operational temperature (55 °C (131 °F) T
Use the graphs in Table 9.3 to Table 9.4 to determine if the output current must be derated based on switching frequency
and ambient temperature. When referring to the graphs, I
indicates the switching frequency.
Enclosure Switching
pattern
E1h–E4h 60 AVM
110
N355 to N560
100
380–480 V
90
80
70
60
0
SFAVM
110
100
90
80
70
60
Table 9.3 Derating Tables for Drives Rated 380–480 V
MG22B102
Design Guide
) should be derated. Refer to Illustration 9.2.
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)
out
High overload HO, 150%
1 2 3 4 5
0 1 2 3
Danfoss A/S © 05/2017 All rights reserved.
,
AMB MAX
AMB,MAX
indicates the percentage of rated output current, and fsw
Normal overload NO, 110%
110
100
90
80
70
50 ˚C (122 ˚F)
60
55 ˚C (131 ˚F)
50
6 7
0 1
110
100
90
80
45 ˚C (113 ˚F)
70
50 ˚C (122 ˚F)
55 ˚C (131 ˚F)
60
4 5
50
0 1
) or
AMB
, MAX-3
AMB
and 50 °C (122 °F) T
).
AMB,AVG
45 ˚C (113 ˚F)
50 ˚C (122 ˚F)
50 ˚C (131 ˚F)
2 3 4 5 6 7
40 ˚C (104 ˚F)
45 ˚C (113 ˚F)
50 ˚C (122 ˚F)
55 ˚C (131 ˚F)
2 3 4 5
9 9
71