4” complete solution made of ZDS technopolimer hydraulic part, DRP-dry Running Protection, 2-wire single-phase encapsulated water-cooled with integrated electronic H2E motor and supply cable (different lengths available). These Complete Solutions, manufactured to ISO 9001 standards, are available up to the maximum delivery of 6.000 l/h and 150 m head. Start and run capacitor is already integrated in the motor. The DRP is an electronic device that guarantees optimal protection of the pump against dry-running and other possible installations faults or operation failures. In case of water shortage, the DRP stops the pump immediately when water drops below the DRP and it restarts the pump automatically a short time after the water rises above the DRP. Unlike traditional solutions, there is no need for additional cables, sensors or control boxes. The P.H2.DRP Complete Solutions are designed to be used in the following applications: lifting, distribution, and pressurisation in civil and industrial water systems, garden irrigation systems, filling of pressure vessels and tanks, fire-fighting systems and washing systems, drainage systems, fountains supply.
The DRP completely protects the P.H2.DRP Complete Solution 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 P.H2.DRP Complete Solution 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 P.H2.DRP Complete Solution 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 P.H2.DRP Complete Solution 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 P.H2.DRP Complete Solution 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.
The DRP protects the P.H2.DRP Complete Solution against voltage peaks, which can be caused by electric abnormalities in the supply network or by other various electrical interferences. It reduces overvoltage, keeping the correct operating voltage range.
