111P LITTELFUSE | Alldatasheet

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Technical content

Littelfuse.com/ 111P ©2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/27/2022 Motor and Pump Protection Relays 111p Series

Description

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. Operation A 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 the incoming 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 its user-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-held diagnostics tool called the Informer* (sold separately). The Informer displays parameters including calibration points, trip points, run time and last faults. There are special considerations for pump cables larger than #10 AWG: In some cases where larger motors are installed with deep-set pumps, pump cables are used that exceed the relay’s terminal size. In these conditions, a short splice of #10 AWG or #12 AWG may be a solution at the control box. Note: All local, state, and national electric codes should be followed when applying this solution. Note: The description and operations apply to Littelfuse models 111P (115 V, 1⁄3 to 1 hp); 233P-1.5 (230 V, 1⁄3 to 1.5 hp); and 233P (230 V, 1⁄3 to 3 hp). These models have a sensitivity adjustment for the dry-well trip point. After calibration is complete, you can adjust the sensitivity for the dry-well/dead-head trip point from 70-90 % of the full load. This makes the unit even more adaptable to varying pumping applications. If you have a very low producing well, you increase the sensitivity closer to the 90 % mark, or if you have a very heavy producing well, you should decrease the sensitivity around the 70 % mark. *Informer: A hand-held diagnostic tool that uses an infrared receiver to access information that can be helpful for troubleshooting the system. Features & Benefits 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 Single-Phase Pump Monitor

Littelfuse.com/ 111P ©2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/27/2022 Motor and Pump Protection Relays 111p Series

Applications

  • Pumps: submersible, centrifugal, circulating, cooling, environmental
  • Waterwells: residential, commercial, irrigation
  • Golf course systems
  • Sprinkler systems Specifications Functional Characteristics Adjustments/Settings: Overcurrent 125% of calibration point Underload (dry-well) Adjustable (70 to 90% of calibrated run power) Overvoltage 132.5VAC Undervoltage 95VAC Number of restarts allowed in a 60-sec. period (rapid-cycling) 4 Trip Delay Times Overcurrent 5 seconds Dry-well 4 seconds Restart Delay Times Over/Undervoltage 2 seconds All other faults Manual, 2-225 Minutes Input Characteristics Supply Voltage 115VAC Load Range 1⁄3 – 1 hp Frequency 50/60Hz (Note: 50Hz will increase all delay timers by 20%) Output Characteristics Output Contact Rating-SPST 1hp@120VAC (16 amps max.) General Characteristics Operating Temperature -40º to 55º C (-40º to 131º F) Maximum Input Power 5 W Wire Gauge Solid or Stranded 10 - 22AWG Terminal Torque 13 in.-lbs. Weight 14 oz. Mounting Methods #8 screws Certification & Compliance cULus Listed UL508, C22.2 No. 14 Accessories Informer A hand-held diagnostic tool that uses an infrared receiver to access information which can be helpful for troubleshooting the system.

Ordering Information

MODEL LINE VOLTAGE DESCRIPTION 111P 115VAC Load Range: 1⁄3 - 1hp 111P-ENCL 115VAC 111P with NEMA3R enclosure

Littelfuse.com/ 111P ©2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/27/2022 Motor and Pump Protection Relays 111p Series Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for Simplified Wiring Diagram Dimensions Inches (mm) 111P / 233P / 235P DIMENSIONS 4.03" (102.36) 5.25" (133.35) 4.50" (114.30) 0.375" (9.53) 2.90" (73.66) 2.163" (54.94) 2.913" (73.99) 111P / 233P / 235P DIMENSIONS 4.03" (102.36) 5.25" (133.35) 4.50" (114.30) 0.375" (9.53) 2.90" (73.66) 2.163" (54.94) 2.913" (73.99)