The DRP completely protects the ZDJet.P.DRP complete submersible pump against lack of water in the well, without the aid of other equipment (probes, cables, sensors, control panels etc.). In case of dry running, the DRP automatically stops the pump. the DRP restarts the pump after a programmed cycle time.
The ZDJet.P.DRP complete submersible pump is automatically protected against motor overheating. This can happen because of: the high temperature of the pumped liquid; when the minimum distance between the pump installed and the well bottom isn’t respected; when the pump is installed in well/tanks bigger than 4” without a proper cooling system; when the pump works in shut-off. In such cases, the thermal protection system stops the pump, which automatically restarts as soon as the correct working temperature parameters are restored.
The ZDJet.P.DRP complete submersible pump is protected against against overload. In case the pump is partially or totally blocked, it automatically restarts as soon as the correct working temperature parameters are restored.
The DRP protects the ZDJet.P.DRP complete submersible pump against low voltage, that can damage the motor. Low voltage can occur, for example, if the section of the power cable is not adequate considering the motor power and the distance between the plug and the pump itself; or if a generator is faulty or undersized for the pump.
The DRP protects the ZDJet.P.DRP complete pump against leaks in the piping system (also when the pressure tank is exhausted or its membrane is defective, or when ther is a defective pressure switch) and too frequent starts and stops (for example if the tank is too small for the system). In such cases, to avoid potential damages, the DRP makes the pump enter the stand-by mode.
