Why is the measured mains voltage does not match the mains voltage readings according to the HMI on ATV61 or ATV71?
Issue:
Why is the measured mains voltage does not match the mains voltage readings according to the HMI on ATV61 or ATV71?
Product line:
Altivar ATV61 and ATV71
Environment:
All models, all serial numbers
Cause:
Flat topping on the input AC waveform.
Resolution:
The HMI's mains votage reading is a measurement of the DC bus not a measurement of L1 L2 L3. Calculate the Mains voltage by taking the DC bus value and divided it by the square root of 2.
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