LRD- series thermal overload relay is used in the power network of AC 50Hz or 60Hzvoltage up to 660V,current of 93A and below, it protectsthe circuit and electromotor from overload, phase loss, long starting duration, and long blocking duration, With the diferental mechanism, temperaturecompensation ,adjustable seting curent,and optional auto or manual resetting, t can be working individually or assembled with CJX2 AC contactor.