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What is BUF (Braking Unit Fault) in Altivar 71 Drive.

This fault appears only for the drives > 90kW.
This fault appears when there is a short-circuit on the output of the braking transistor (desaturation of the braking IGBT).
Refer to attached file for more detail.

Schneider Electric India

Attachment(s)
ATV71_BUF fault.pdf [104.41 KB]
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