ZDS Three-Phase Dry Running Protection
What is the Pump Protector – DRP?
The Pump Protector – DRP is an innovative electronic device that guarantees optimal protection of the submerged pump from dry running. Additionally, it also protects the motor from burning out in case of repeated starts and stops.
Where is the DRP installed and how does it work?
The DRP is ready for use, integrated into the connection cable and needs no further installation. In case of water shortage, the DRP stops the pump immediately, the water drops below the DRP and restarts the pump automatically a short time after the water rises above the DRP to allow water to flow into the borehole. In contrast to traditional solutions, no additional cables, sensors and control boxes are needed. The DRP device has been developed and tested to make the submerged pump function autonomously in conditions of water shortage.
In case of repeated starting and stopping of the pump, such as when the air in a pressure tank is low or the membrane is damaged, the DRP registers the frequent starts and stops. The DRP will automatically stop the motor from burning out. The DRP may be reset simply by disconnecting the power supply.
What are the technical limitations?
NOW the Pump Protector – DRP is available for Franklin motors single-phase as well as three-phase.
- The blue DRP (https://peelpumps.co.uk/buy/zds-single-phase-dry-running-protection/) for single-phase use has a permissible range of 220-240v at frequency 50/60 Hz. To manage the inductive load of a single-phase motor, the maximum motor power is limited to 2.2 kW.
- The red DRP for three-phase dry running protection has a permissible range of 220-240V at frequency 50/60 Hz maximum motor power is limited to 2.2 kW. For 380v-415v motors at frequency 50/60 Hz maximum motor power is limited to 4 kW.
We can now supply DRP’s for every motor in our range up to and including 4 kW in single & three-phase. It is worth bearing in mind that, to ensure trouble-free operation, the three-phase DRP’s and the single phase 2.2 kW DRP may ONLY be purchased with the appropriate motor. It cannot be bought as a separate unit. Because of the protection they offer to the motors, not just dry-running protection, we believe we are approaching the point where the majority of our motors will be supplied with the DRP already fitted. It is still the case that no other manufacturer is able to match this product. We believe that it gives all of our customers a terrific selling point when they are faced with competition from other brands.