Danfoss VLT AutomationDrive FC 361 Series

6.6.3 Derating for Ambient Temperature and Switching Frequency
NOTICE
FACTORY DERATING
Danfoss drives are already derated for operational temperature (55 °C (131 °F) T
AMB,MAX
and 50 °C (122 °F) T
AMB,AVG
).
Use the graphs in Table 6.3 to determine if the output current must be derated based on switching frequency and ambient
temperature. When referring to the graphs, I
out
indicates the percentage of rated output current, and fsw indicates the
switching frequency.
Enclosure Switching
pattern
High overload HO, 150% Normal overload NO, 110%
J8–J9
380–480 V
60 AVM
130BX473.11
Iout [%]
fsw [kHz]
70
80
90
1
60
100
110
2 3 4 5 6 7 8
9
0
50 ˚C (122 ˚F)
55 ˚C (131 ˚F)
130BX474.11
70
80
90
1
60
100
110
2 3 4 5 6 7 8 90
50
Iout [%]
fsw
[kHz]
45 ˚C (113 ˚F)
50 ˚C (122 ˚F)
55 ˚C (131 ˚F)
SFAVM
130BX475.11
Iout [%]
fsw
[kHz]
70
80
90
60
100
110
2 4 60
31 5
45 ˚C (113 ˚F)
50 ˚C (122 ˚F)
55 ˚C (131 ˚F)
130BX476.11
Iout [%]
fsw
[kHz]
70
80
90
60
100
110
2 4
60
50
1
3
5
40 ˚C (104 ˚F)
45 ˚C (113 ˚F)
50 ˚C (122 ˚F)
55 ˚C (131 ˚F)
Table 6.3 Derating Tables for Drives Rated 380–480 V
Mechanical Installation Con... Design Guide
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