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How Mains voltage (ULn) measured on Altivar 71 drive.

Published date: 13 May 2019

Mains voltage (ULn) is the Line voltage from the point of view of the DC bus, motor running or stopped. 
Actually ULn is calculated from the measured DC bus [ULn = DC bus/root square (2)]. ULn is not directly measured by drive.

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