JNN 1.5KW 2.2KW 4KW 220V 380V Intelligent VFD Pump Control Cabinet Controller for Motors and Water Pumps

▘Protective functions: Over current,over-voltage,low-voltage,over heat,phase failure,and overload,and no load.
▘Control Mode: Constant pressure,constant differential pressure,manual ▘Power On Restart: Running automatically when power on
▘Master Fault Shift Automatically: keep on working when the master breaks down
▘Alternate Running: Balance every pump’s running time,prolong service life of the whole unit machine
▘Linkage Mode: Synchronize,master-slave,big-small pump combination,one duty one standby
▘Terminal Control Mode: Electronic contact gauge control,manual/auto control,terminal run/stop,automatic water level control
▘One Duty One Standby Day-part Function: 3 independent day-part time section control
▘Various of Water Supply Fault Alarm Function: High-pressure,low-pressure,low-level,transducer error etc.
▘Many Fault Protection Function: Over-current,over-voltage,low-voltage,phase-failure,overload etc.