... kinds of load of the squirrel-cage motor. JJR2 Series low voltage soft start apply to AC ... for strict requirement for starting Current ,the motor current changes waveform- The sudden jump of ... heavy-load 2) Applicable motor : squirrel-cage type three-phase asynchronous motor,motor rated power should match with ... current not balance,over hot,lack phase,motor overload 6) Dynamic fault memory function,easy ...