The Littelfuse models 111P (115 volt, 1⁄3 to 1hp); 233P-1.5 (230 volt, 1⁄3 to 1.5hp); and 233P (230 volt, 1⁄3 to 3hp) are single-phase pump monitors used in a variety of applications to protect from dry-well, dead-head, jammed impeller, rapid-cycling, overvoltage, and undervoltage conditions.
Features & Benefits:
- Proprietary microcontroller-based circuitry: Constant monitoring of voltage, power factor, and current for reliable pump protection
- Onboard calibration process: Calibrates unit to your specific individual pumping application and reduces nuisance tripping
- Onboard sensitivity adjustment: User-adjustable sensitivity knob makes the unit more adaptable to varying pumping applications
