... ,D40,D80 thermal overload relay LR1 series thermal overload relay are suitable for overload and phase-failure protection of ACmotors with ... 8-hours duty or uninterrupted duty.Functions provided by these relays, are phase-failure protection, ON/OFF indication, temperaturecompensation ... GB 14048. International Standards: IEC 60947-4-1The relays can be mounted onto contactors or installed as single units ...