Derating For Temperature - Danfoss VLT AutomationDrive FC 302 Instruction Manual

Specifications
4) The typical power loss is at nominal load conditions and expected to be within ±15% (tolerance relates to
variances in voltage and cable conditions). Values are based on a typical motor efficiency (IE2/IE3 border line).
Motors with lower efficiency will also add to the power loss in the adjustable frequency drive and vice-versa. If the
switching frequency is increased to the default setting, the power losses may rise significantly. LCP and typical
control card power consumptions are included. Further options and customer load may add up to 30 W to the
losses. (Though typical only 4 W extra for a fully loaded control card, or options for slot A or slot B, each).
Although measurements are made with state-of-the-art equipment, some measurement inaccuracy must be
allowed for (±5%).

11.1.2 Derating for Temperature

The adjustable frequency drive automatically derates the switching frequency, switching type, or output current under
certain load or ambient conditions as described below. The derating curves in Figure 11.1 and Figure 11.2 apply to both
SFAVM and 60 AVM switching modes.
110
100
90
80
70
60
0.0
Figure 11.1 Derating Frame Sizes D, E, and F 380–500 V (T5) High Overload 150%
11 11
110
100
90
80
70
60
50
0.0
Figure 11.2 Derating Frame Sizes D, E, and F 380–500 V (T5) Normal Overload 110%
152
0.5 1.0 1.5 2.0 2.5
0.5 1.0 1.5 2.0 2.5
Danfoss A/S © Rev. 2014-02-07 All rights reserved.
Instruction Manual
o
45 C
o
50 C
o
55 C
3.0 3.5 4.0
o
40 C
o
45 C
o
50 C
o
55 C
3.0 3.5 4.0
MG37A222