Danfoss VLT 5000 Series Instruction Manual page 215

Derating for ambient temperature
The ambient temperature (T
temperature allowed. The average (T
ured over 24 hours must be at least 5ºC lower.
•
The current of VLT 5122-5552, 380-500 V
and VLT 5042-5352, 525-690 V, is to be de-
rated 1% / ºC above 45ºC maximum (160%
overload) and 40ºC maximum (110% over-
load). Max. temperature is 55° C.
Derating for Air Pressure
At altitudes above 6,600 feet [2000 m],
please contact Danfoss Drives regarding
PELV.
Below an altitude of 3280 ft. [1000 m], no derating is
necessary.
Above 3280 ft. [1000 m], the ambient temperature
(T ) or max. output current (I
AMB
ed in accordance with the diagram below:
212
) is the maximum
AMB,MAX
) meas-
AMB,AVG
) must be derat-
VLT,MAX
®
VLT 5000 Series
If the adjustable frequency drive is operated at tem-
peratures above 45 ºC, a derating of the continuous
output current is necessary.
•
The current of VLT 5402-5602, 525-690 V,
is to be derated 1.5% / ºC above 45ºC max-
imum (160% overload) and 40ºC maxi-
mum (110% overload). Max. temperature
is 55° C.
1. Derating of output current versus altitude at
T = max. 113° F [45° C]
AMB
2. Derating of max. T
100% output current.
MG.51.C5.22 - VLT is a registered Danfoss trademark.
versus altitude at
AMB