Frame Size B (except B2 525–690 V)
For the B and C frames, the derating also depends on the overload mode selected in par. 1-04
Overload Mode
60
º
AVM - Pulse Width Modulation
Figure 4.6: Derating of I
out
for different T
AMB, MAX
for frame
size B, using 60
º
AVM in High torque mode (160% over tor-
que)
SFAVM - Stator Frequency Asyncron Vector Modulation
Figure 4.7: Derating of I
out
for different T
AMB, MAX
for frame
size B, using SFAVM in High torque mode (160% over tor-
que)
Figure 4.8: Derating of I
out
for different T
AMB, MAX
for frame
size B, using 60
º
AVM in Normal torque mode (110% over
torque)
Figure 4.9: Derating of I
out
for different T
AMB, MAX
for frame
size B, using SFAVM in Normal torque mode (110% over
torque)
Frame Size B2, 525–690 V
Figure 4.10: Output current derating with switching fre-
quency and ambient temperature for frame size B2, 60
º
AVM. Note: The graph is drawn with the current as absolute
value and is valid for both high and normal overload.
Figure 4.11: Output current derating with switching fre-
quency and ambient temperature for frame size B2, SFAVM.
Note: The graph is drawn with the current as absolute value
and is valid for both high and normal overload.
4 AutomationDrive FC 300 Selection
FC 300 Design Guide
4-32
MG.33.BC.22 - VLT
®
is a registered Danfoss trademark
4
