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Why is a line reactor required when using the 575 and 600 vac drives?

Issue:
Why is a line reactor required when using the ATV  575 and 600 vac drives?

Product Line:
Altivar 312, Altivar 61, Altivar 71, Other Altivar legacy drives.

Environment:
All models rated for 575-600VAC main supply, all serial numbers.

Cause:
Clarification of installation requirements.

Resolution:
A line reactor is necessary on 575-600V rated Altivar drives in order to limit the peak inrush current at power up to safe levels.  
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