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Why is the measured mains voltage does not match the mains voltage readings according to the HMI on ATV61 or ATV71?

Published date: 24 June 2020

Measured Mains Voltage does not match the Mains Voltage readings of HMI on ATV61/71

Product line:  
Altivar ATV61 and ATV71

All models, all serial numbers

Flat topping on the input AC waveform. 

The HMI's Mains Voltage reading is a calculation of the Mains Voltage, by reading the DC bus. It is calculated by taking the DC bus value and dividing it by the square root of 2.

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