Control_Flippingbook_JULY 2026

NEMA FULL VOLTAGE POWER DEVICES, CONTROL SECTION 1

1-115

— Plug and play enclosed starters Overload relay product overview

Overload relay selection

HP-rated magnetic starters • Generally require a class 10 overload relay • Please choose the appropriate thermal OLR (TF42 to TF140) for these applications • Thermal OLRs can be used in single-phase applications NEMA-rated magnetic starters • Generally require a class 20 OR 30 overload relay (for heavy-duty applications) • Please choose the appropriate thermal OLR (EF19 to EF146) for these applications • Electronic OLRs can not be used in single phase (120 or 240 V) applications

* It is the client’s responsibility to confirm whether the overload relay suggested is appropriate for their application. Please verify correct overload required for each specific application with the motor’s name plate.