H. K. Electric Co.

The LR2 Thermal Overload Relay is an electromechanical protection device used in conjunction with contactors for the protection of AC motors against overload, phase failure, and unbalanced current. It is typically used in motor control circuits and installed beneath contactors like the LC1 series. The relay uses a bimetallic strip that bends under heat caused by excessive current to trip the circuit and stop the motor, preventing damage.