... as unique over current, stall and torque protection make Kinco VFD work smoothly and safely. ... VFDSmall and light,compact design,easy operationItemDescriptionInput Rated Voltage/Frequency1PH / 3PH AC 220V 50 / 60Hz ... voltage protection level can be setUndervoltage ProtectionUnder voltage protection level can be setOther ProtectionsOverheat protection, short-circuit protection, over current protection, ...