... installed as single unit.3UA thermal relay series are suitable for overload and phase-failure protection of ACmotors with frequency of 50 ... ,0.32~0.63,0.63~0.1,0.8~1.25,1~1.6,1.25~2,1.6~2.5,2~3.2,2 ... .25~0.4,0.32~0.63,1.63~1,0.8~1.25,1~1.6,1.25~2,1.6~2.5,2~3.2 ... ,0.32~0.63,0.63~0.1,0.8~1.25,1~1.6,1.25~2,1.6~2.5,2~3.2,2 ...