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Will the LRD overload relay with single phase sensitivity protect a motor from single phasing?

FA125410

26/07/2018

Issue:
Does the LRD overload relay line protect the motor from single phasing?

Product Line:
IEC contactors and starters

Environment:
Products sold and used in the United States

Cause:
Identifying product characteristics

Resolution:
These overloads meet the definition and requirements of single phase sensitivity as stated in IEC 60947. For the best protection if single phasing is likely to be present, use a phase failure relay in addition to the overload.