Digital Starter Protector – 3Phase, 380V, Generation 2

Our Generation 2 Digital Starter Protector is available in three phase 380V and ranges from 0.37kW to 7.5kW. It can be connected to motors with identical voltage and power to protect the motor and pump, should a scenario occur that may lead to failure. It offers the following protection: Dry run, Over load, Transient surge, Under- & Over Voltage, Open phase, Pump stalled, Short circuit, Over temp, Three phase unbalance, Phase reversal & Repeated start. It works without a probe/sensor and can record the last 5 faults in its memory. With an IP 54 rating this product is protected against dust ingress and water splash, but is not dust tight.



Model L931 has many operation modes by adopting different electric installations. An important feature that makes the difference between Model L931 and common On/Off pump control box is the probe / sensor free in the well. Our special design makes it a very reliable and sensitive protection against pump dry running without installation of a probe / sensor in the well.

Technical parameter & Features:

  1. Built In function switch
    • applied for water supply by liquid level control through float switch or liquid probe;
    • applied for water supply by pressure control through pressure switch and pressure tank;
    • applied for drainage by liquid level control through float switch or liquid probe.
  2. Automatic stops the pump in the case of water shortage, protecting it from dry running without installing float switch or liquid probe in the well.
  3. Auto / Manual switch.
  4. Dynamic LCD displaying pump running state.
  5. Push Button Calibration.
  6. Pump Accumulative Running Time Displaying.
  7. Pump Last Five Fault Record Displaying.
  8. RS485 Communication.
  9. Starts and stops the pump in accordance with the different liquid level or pressure setting.

Additional information




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