... warranty:12 months ZJR1-Z-series soft starter device type can work without three-phase AC motor in the process of starting ... 60 seconds can be arbitrary choice; 5. with the flow, over loading, lack phase, instantaneous stop, and other malfunction protection; ... and reasonable prices; Scope of application: ZJR1-Z series soft starter motor applies to centrifuges, blower, compressor, transport planes, ...