... be installed as single unit.3UA thermal relay series are suitable for overload and phase-failure protection of ACmotors with frequency of ... duty. It is used to protect AC three-phase asynchronous motor against overload and open-phase. The current setting value can be regulated and ... ~2,1.6~2.5,2~3.2,2.5~4,3.2~5,4~6.3,5~8,6.3~10,8~12.5 3UA52 ... ~2,1.6~2.5,2~3.2,2.5~4,3.2~5,4~6.3,5~8,6.3~10,8~12.5,10 ...