... ,D40,D80 thermal overload relay LR1 series thermal overload relay are suitable for overload and phase-failure protection of ACmotors with frequency of 50/ ... , 50, 636336157~66CJX2-40, 50, 638036363~80CJX2-40, 50, 63 Thermal Overload Relay/Thermal Relay/LR1 thermal relay