Application: Control & Protect three phase pump, DOL
Our special design makes it a very reliable and sensitive protection against pump dry running without installation of any probe/sensor in the deep well.
Main Features:
Built in function switch:
Applied for water supply by liquid level control or booster
Applied for drainage by liquid level control
- Auto / Manual switch
- Starts and stops the pump in accordance with the different liquid level or pressure setting.
- Push Button Calibration
- Automatically stop the pump in the case of water shortage, protecting it from drying running
Without installing the float switch or liquid probe in the well
- Pump accumulative running time displaying
- Pump last five fault record displaying
- LCD displays pump running information
- Protect the pump against Over /Under Voltage; Over Current; Pump Shaft Rust; Rapid
Cycle ,Open phase ,phase reversal,phase unbalnced protection .
- Grade of Protection IP 54
- Visual & Audio alarm for fault prompt
- Present remote monitor
Main Technical Characteristic
| Control characteristic | double liquid level control/pressure control |
| Control method | Manual/Auto |
| Liquid level control characteristic | pulse electrode probe&float switch |
| Pressure control characteristic | pressure switch(n/c)&pressure tank |
| Rated output power | 0.75-4kw ,5.5-11kw,15kw |
| Trip response time of over load | 5sec-5min |
| Trip response time of open phase | <2sec |
| Trip response tiem of short circuit | <0.1sec |
| Trip response time of dry run | 6sec |
| Liquid level transfer distance | <=1000m |