The DRP completely protects the H2.DRP motor 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 motor. When the water level is restored in the well, the DRP restarts the motor after a programmed cycle time.
The H2.DRP motor is protected against 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 built-in thermal protection system stops the pump, which automatically restarts as soon as the correct working temperature parameters are restored.
The H2.DRP motor 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 pump against leaks in the piping system (also when the pressure tank is exhausted or its membrane is defective, 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 H2.DRP motor against low voltage, that could damage it. 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 H2.DRP motor 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.