20 July 2022
How do you calculate the DC bus voltage using the "Mains Voltage" (ULn) displayed in the Monitor menu
ATV61, ATV71, ATV312, ATV12, ATV32
All models and serial numbers
These drives do a calculation using the measured DC bus voltage to estimate the mains voltage (line supply). The drive measures the DC Bus internally and divides it by 1.414 (square root of 2) and then displays it as the Mains Voltage (ULn) In the monitor menu.
So, when given ULn, simply multiply by 1.414 to get the measured DC bus voltage value.