Danfoss VLT AutomationDrive FC 301 Programming Manual page 528

Programming Guide | VLT® AutomationDrive FC 301/FC 302
Current
% of rated
110
105
100
95
~ ~
60s
Desired current>100%
Inverter
load
counter
100
98
90.7
Warning
Figure 90: Output Current in Overload Condition
If the motor is unable to run continuously with the demanded capacity, run it at reduced speed for a while.
Select parameter 14-61 Function at Inverter Overload to automatically reduce motor speed until the output current is below 100% of the
rated current (set in parameter 14-62 Inv. Overload Derate Current). Parameter 14-61 Function at Inverter Overload is an alternative to
letting the drive trip.
The drive estimates the load on the power section with an inverter load counter, which causes a warning at 98% and a reset of the
warning at 90%. At the value 100%, the drive trips and issues an alarm. Status for the counter can be read in parameter 16-35 Inverter
Thermal.
If parameter 14-61 Function at Inverter Overload is set to [3] Derate, the motor speed is reduced when the counter exceeds 98%, and
stays reduced until the counter has dropped below 90.7%. If parameter 14-62 Inv. Overload Derate Current is set to for example 95%, a
steady overload causes the pump speed to fluctuate between values corresponding to 110% and 95% of rated output current for the
drive.
14-60 Function at Over Temperature
Default value: [0] Trip
Setup:
All setups
Data type: Uint8
If either heat sink or control card temperature exceeds a factory-programmed temperature limit, a warning is activated. If the
temperature increases further, select whether the drive should trip (trip lock) or derate the output current.
528 | © 2024.09
Time
Time
Warning
130BA260.10
Parameter type:
Conversion index:
Change during operation:
Parameter Descriptions
Option
–
True
AU275636650261en-003201 / 130R0334