Is there a way to determine the DC bus voltage from the display?

FA175874

20 July 2022

Issue:
How do you calculate the DC bus voltage using the "Mains Voltage" (ULn) displayed in the Monitor menu
 
Product Line:
ATV61, ATV71, ATV312, ATV12, ATV32
 
Environment:
All models and serial numbers
 
Cause:
None
 
Resolution:
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.
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