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What size Field Drives require fusing for short circuit protection?

Issue:
What size Field Drives require fusing for short circuit protection?

Product Line:
Field drive ATV61, ATV71

Environment:
All

Cause:
Short circut protection.

Resolution:
For a field drive rated at 230V single phase input you will have fuses at 30 HP.
For a field drive rated at 230V three phase input you will have fuses starting at 60 HP and larger.
For a field drive rated at 460V three phase input you will have fuses starting at 125 HP and larger.

All other sizes use Circuit Breakers for short circuit protection.

Consult the Altivar 61/71 Field Drive lnstruction Bulletin for details.  Document number 30072-454-01
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