The DRP completely protects the 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 motor is protected against overload. In case the pump is partially o totally blocked, the DRP, after some automatic re-start attempts, makes it enter the stand-by mode. * Protection not available for O3 motors.
The DRP protects the submersible pump against leaks in the piping system (also when the pressure tank is exhausted or its membrane is damaged, or when there 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.
The DRP protects the 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 pump against phas-loss (for example caused by a brake of a fuse). The DRP protects the motor against damaging.