Danfoss vlt aqua, Инструкция по эксплуатации, Страница: 176 / 184

60 AVM - Pulse Width Modulation, 525–600 V
Figure 10.17: Derating of I
out
for different T
AMB, MAX
for en-
closure E at 600 V, using 60 AVM in normal torque mode
(110% over torque).
SFAVM - Stator Frequency Asyncron Vector Modulation
Figure 10.18: Derating of I
out
for different T
AMB, MAX
for en-
closure E at 600 V, using SFAVM in normal torque mode
(110% over torque).
10.2.3 Derating for Low Air Pressure
The cooling capability of air is decreased at a lower air pressure.
At altitudes higher than 6,600 feet [2 km], please contact Danfoss regarding PELV.
At an altitude lower than 3,280 ft [1,000 m], no derating is necessary, but above 3,280 ft [1,000 m], the ambient temperature (T
AMB
) or max. output
current (I
out
) should be derated in accordance with the diagram shown.
Figure 10.19: Derating of output current versus altitude at T
AMB, MAX
. At altitudes above 6,600 feet [2 km], please contact Danfoss regarding
PELV.
An alternative is to lower the ambient temperature at high altitudes and thereby ensure 100% output current at high altitudes.
10 Specifications
VLT
®
AQUA Drive
Instruction Manual
10-20
MG.20.M5.22 - VLT
®
is a registered Danfoss trademark
10