... function:Overload,phase failuer,block,three phase current unbalance,under-voltahe etc.2,Error display:With phase A,phaseB, ... motor.4,Set function:Can set the rated current value and over-current protect delayingtime on site Normal Service Condition 1, ... Ltd) have more than six years' experience in producing and exporting low voltage electricity, including ac contactor, air pressure switch, magnetic ...