Issue:
Constant and Variable Torque loads on ATV31.
Product Line:
Altivar 31
Environment:
ATV31 all series
Cause:
N/A
Resolution:
Yes. It can be used for CT & VT applications.
Selection of the voltage/frequency ratio, parameter UFt in the drC menu, determines the torque setup. The available settings are as follows:
L: Constant torque (for motors connected in parallel or special motors)
P: Variable torque (pump and fan applications)
n: Sensorless flux vector control (for constant torque applications)
nLd: Energy savings (for variable torque applications not requiring high dynamics. This behaves in a way similar to the P ratio at no-load and the
n ratio with load.)
Modifying UFt will cause UFr to return to the factory setting of 20%.
Constant and Variable Torque loads on ATV31.
Product Line:
Altivar 31
Environment:
ATV31 all series
Cause:
N/A
Resolution:
Yes. It can be used for CT & VT applications.
Selection of the voltage/frequency ratio, parameter UFt in the drC menu, determines the torque setup. The available settings are as follows:
L: Constant torque (for motors connected in parallel or special motors)
P: Variable torque (pump and fan applications)
n: Sensorless flux vector control (for constant torque applications)
nLd: Energy savings (for variable torque applications not requiring high dynamics. This behaves in a way similar to the P ratio at no-load and the
n ratio with load.)
Modifying UFt will cause UFr to return to the factory setting of 20%.
Released for: Schneider Electric Canada


Need help?
Product Selector
Quickly and easily find the right products and accessories for your applications.
Get a Quote
Start your sales inquiry online and en expert will connect with you.
Where to buy?
Easily find the nearest Schneider Electric distributor in your location.
Help Center
Find support resources for all your needs, in one place.