Littelfuse 111P, 111P Series, Single-Phase Pump Monitor, Voltage Sensing AC 115VAC, 1 Phase, Load Range: 1 ⁄3 - 1hp

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DescriptionThe 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 singlephase pump monitors used in a variety of applications to protect from dry-well, dead-head, jammed impeller, rapid-cycling,overvoltage, and undervoltage conditions.oltage conditions. OperationA calibration adjustment allows the unit to be calibrated to your specific pumping applications, which reduces the possibility of false or nuisance tripping. A unique microcontroller-based voltage and current-sensing circuit constantly monitor theincoming power for fluctuations, overcurrent, and undercurrent conditions. When an abnormality, such as loss of suction, is detected, the product deactivates its output relay and directly disconnects the pump motor. The relay then begins itsuser-selectable restart delay (dry-well recovery) timer. When the timer counts to zero or power is removed and reapplied, the relay reactivates its output relay and turns the pump back on. The infrared LED communicates with a hand-helddiagnostics tool called the Informer* (sold separately). The Informer displays parameters including calibration points,trip points, run time and last faults. Applications• Pumps: submersible, centrifugal, circulating, cooling, environmental• Waterwells: residential, commercial, irrigation• Golf course systems• Sprinkler systems Specifications Functional Specifications Adjustments/Settings Overcurrent 125 % of calibration point Underload (dry-well) Adjustable (70 to 90 % of calibrated run power Overvoltage 132.5 V ac Undervoltage 95 V ac Number of restarts allowed ina 60-sec. period (rapid-cycling) 4 Trip Delay Times Overcurrent 5 secondsDry-well 4 seconds Restart Delay Times Over/Undervoltage 2 secondsAll other faults Manual, 2–225 minutes Input Characteristics Supply Voltage 115 V ac Load Range 1 ⁄3 – 1 hp Frequency 50/60 Hz (Note: 50 Hz will increase all delay timers by 20 %) Output Characteristics Output Contact Rating-SPST 1hp@120VAC (16 amps max.) General Characteristics Operating Temperature -40 °C to 55 °C (-40 °F to 131 °F) Maximum Input Power 5 W Wire Gauge Solid or Stranded 10 - 22AWG Terminal Torque 13 in.-lbs. Dimensions H 73.66 mm (2.9”)W 133.35 mm (5.25”)D 73.99 mm (2.913”) Weight 14 oz. Mounting Methods #8 screws Certification & Compliance cULus Show more