Danfoss VLT Aqua Drive FC 202 Operating Instructions Manual page 138

9. Specifications
B enclosures
60 PWM - Pulse Width Modulation
Illustration 9.5: Derating of I
MAX
que mode (110% over torque)
C enclosures
60 PWM - Pulse Width Modulation
9
Illustration 9.7: Derating of I
MAX
que mode (110% over torque)
9.2.3. Derating for Low Air Pressure
The cooling capability of air is decreased at lower air pressure.
At altitudes higher than 2 km, please contact Danfoss Drives regarding PELV.
Below 1000 m altitude no derating is necessary but above 1000 m the ambient temperature
(T
AMB
138
for different T
out
for enclosure B, using 60 PWM in Normal tor-
for different T
out
for enclosure C, using 60 PWM in Normal tor-
) or max. output current (I
out
MG.20.M2.02 - VLT
SFAVM - Stator Frequency Asyncron
Vector Modulation
AMB,
Illustration 9.6: Derating of I
for enclosure B, using SFAVM in Normal torque
MAX
mode (110% over torque)
SFAVM - Stator Frequency Asyncron
Vector Modulation
AMB,
Illustration 9.8: Derating of I
for enclosure C, using SFAVM in Normal torque
MAX
mode (110% over torque)
) should be derated in accordance with the shown diagram.
®
is a registered Danfoss trademark
®
VLT AQUA Drive
Operating Instructions
for different T
out AMB,
for different T
out AMB,