Protection Relays Motor and Pump Protection 111P / 233P / 233P-1.5 SERIES Single-Phase Pump Monitor Description The Littelfuse Models 111P (115 V, to 1 hp) 233P-1.5 (230 V, to 1.5 hp) and 233P (230 V, to 3 hp) protect pumps from dry-well, dead-head, jammed impeller, overvoltage/ undervoltage conditions, and rapid-cycle protection whether the pressure switch is mounted before or after our unit. A calibration adjustment allows the unit to be calibrated to your specific pumping applications, thereby reducing the possibility of false or nuisance tripping. A unique microcontroller-based voltage and current-sensing circuit constantly monitors the incoming power for fluctuations, overcurrent, and undercurrent. When an abnormality, such as loss of suction is detected, the unit deactivates its output relay and directly disconnects the pump motor. The unit then begins its user-selectable restart delay (dry-well recovery) timer. When the timer counts to zero or power is removed and reapplied, the unit reactivates its output Wiring Diagram 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. 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 relays 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 111P/233P/233P-1.5 models have a sensitivity adjustment for the dry-well trip point. After calibration is done, 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 would decrease the sensitivity around the 70 % mark. Features & Benefits FEATURES BENEFITS Proprietary Constant monitoring of voltage, power factor, microcontroller based current for reliable pump protection Ordering Information circuitry Onboard calibration Calibrates unit to your specific individual pumping MODEL LINE VOLTAGE DESCRIPTION process application and reduces nuisance tripping Onboard sensitivity User adjustable sensitivity knob makes the unit 111P 115 V ac Load Range: - 1 hp adjustment more adaptable to varying pumping applications 111P-ENCL 115 V ac 111P with NEMA3R enclosure Accessories 233P 230 V ac Load Range: - 3 hp 233P-ENCL 230 V ac 233P with NEMA3R enclosure Informer A hand-held diagnostic tool that uses an infrared 233P-1.5 230 V ac Load Range: - 1.5 hp receiver to access information which can be helpful for troubleshooting the system. 233P-1.5-ENCL 230 V ac 233P-1.5 with NEMA3R enclosure 2019 Littelfuse, Inc. Rev: 2-C-042619 wwwwwwwwwwww.littelfuse.com/.littelfuse.com/.littelfuse.com/.littelfuse.com/111p-233pProtection Relays Motor and Pump Protection 111P / 233P SERIES Output Characteristics Specifications Output Contact Rating-SPST Functional Specifications 111P 1 hp 120 V ac (16 amps max.) Adjustments/Settings 233P-1.5 1.5 hp 240 V ac (10 amps max.) Overcurrent 125 % of calibration point 233P 3 hp 240 V ac (17 amps max.) Underload (dry-well) Adjustable (70 to 90 % of calibrated run power) General Characteristics Overvoltage Operating Temperature -40 C to 55 C (-40 F to 131 F) 111P 132.5 V ac Maximum Input Power 5 W 233P, 233P-1.5 265 V ac Wire Gauge Solid or Stranded 10 - 22 AWG Undervoltage Terminal Torque 13 in.-lbs. 111P 95 V ac Safety Marks 233P, 233P-1.5 190 V ac cULus Listed UL 508, C22.2 No. 14 Number of restarts allowed Dimensions H 73.66 mm (2.9) W 133.35 mm (5.25) in a 60-sec. period D 73.99 mm (2.913) (rapid-cycling) 4 Weight 14 oz. Trip Delay Times Mounting Methods 8 screws 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 111P 115 V ac 233P-1.5, 233P 230 V ac Load Range: 111P 1 hp 233P-1.5 1.5 hp 233P 3 hp Frequency 50/60 Hz (Note: 50 Hz will increase all delay timers by 20 %) 2019 Littelfuse, Inc. Rev: 2-C-042619 wwwwwwwwwwww.littelfuse.com/111p-233p.littelfuse.com/.littelfuse.com/.littelfuse.com/