Frequently asked questions
Will the LRD overload relay with single phase sensitivity protect a motor from single phasing?
FA125410
30 September 2021
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.