The Model 111P single-phase PumpSaver®Plus is a pump monitor designed to protect single-phase pumps from dry-well, dead-head, jammed impeller, rapid cycle  and overvoltage and undervoltage conditions. The PumpSaver®Plus Model 111P protects 115 volt, 2 or 3 wire, 1/3 to 1 hp pumps.

A calibration adjustment allows the Model 111P to be calibrated to your specific pumping applications, thereby reducing the possibility of false or nuisance tripping. A proprietary microcontroller based voltage, power factor and current-sensing circuit constantly   monitors for power fluctuations, overcurrent and underload conditions. When an abnormality, such as loss of suction, is detected, the PumpSaver® Plus deactivates its output relay and directly disconnects the pump motor. The PumpSaver® Plus then begins its user-selectable “Restart Delay” (dry-well recovery) timer. When the timer expires or power is removed and reapplied, the PumpSaver®Plus reactivates its output relay, allowing the pump to turn back on.