The DRP completely protects the X.H3F.DRP complete 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 ZDS Control Box protects the X.H3F.DRP complete pump against overload. In case the pump is partially or totally blocked, the overload protection in the ZDS Control Box stops the pump to protect it.
The DRP protects the X.H3F.DRP complete pump against leaks in the piping system (also when the 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 X.H3F.DRP complete 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.