The General Electric RT2H is a thermal overload relay designed to protect electric motors from overheating and overload conditions in industrial motor control systems. It monitors motor current and trips when the current exceeds the adjustable range of 54 to 65 amps, preventing damage caused by excessive load. The relay uses bimetallic thermal elements that react to heat generated by current flow and activate the trip mechanism when overload conditions occur. It typically includes one normally open and one normally closed auxiliary contact and supports manual or automatic reset after a trip. The RT2H is commonly used with compatible GE CL-series contactors in motor starter assemblies for industrial machinery and equipment.