JR52(3UA) thermal relay is suitable forAC.50Hz Or 60Hz voltage upto 660-1000V,current up to 630A,General AC motor of long ordisconsinuous long operation.usedas overload protection.temperature compe.And triindication it can automati cally andpassivelygethack it canbe fixed with contactor to gether,also belindependtly fixed.

Phase Failure Acution Property

NO Set Current Times Intial Condition Ambient Temperature Ambient temperature 1 Random two phases 3 Phase >2h Cold State ±20±5℃ 1.0 0.90 2 1.15 0 <2h Thermal State(after No.1)