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What is a "pass through" overload relay?

A pass through overload relay is a panel mount relay with built in CT's that does not direct mount to a contactor.  Instead, the three leads from the contactor "pass through" the CT openings and then connect to the motor/load.  The C440 versions are for use with NEMA contactors and the XTOE versions are for use with IEC.

 
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