Littelfuse 233P-1.5 PumpSaver Plus Production Description

The 233P is a single-phase pump monitor designed to protect single-phase pumps from dry-well, dead-head, jammed impeller, rapid cycle, overvoltage and undervoltage conditions. The 233P protects 230 volt, 2 or 3 wire, 1/3 to 3hp pumps.

A calibration adjustment allows the 233P 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 233P 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 expires or power is removed and reapplied, the relay reactivates its output relay and allows the pump to turn back on.

Littelfuse 233P-1.5 PumpSaver Plus Typical Application

• Well Pump
• Reservoir Pump
• Transfer Pump
• Sewage Pump

Littelfuse 233P-1.5 PumpSaver Plus Technical Details

• Protect Single Phase Pumps From the Following Conditions: Run Dry, Dead Head, Jammed Impeller, Rapid-Cycle, Overvoltage, and Undervoltage
• 230V, Single Phase
• 1/3 - 1.5 HP Pumps
• Calibrated for Specific Pumping Applications
• Automatic Timeout and Pump Restart
• Ideal for Submersible Pumps
• State-of-the-Art Pump Protection
• Infrared LED Communication to SymCom’s Informer
• UL Listed
• 5-Year Warranty

Littelfuse 233P-1.5P Single-Phase PumpSaver Plus Specifications

Adjustments/Settings

• Overcurrent . . . . . . . . . . . . . . . . . . 125% of calibration point
• Underload (dry-well) . . . . . . . . . . . Adjustable (70 to 90% of calibrated run power)

Overvoltage . . . . . . . . . . . . . . . . . . . . . 265VAC

Undervoltage . . . . . . . . . . . . . . . . . . . . 190VAC

Number of Restarts Allowed in a 60-sec. Period (rapid-cycling) . . . . . . . 4

Trip Delay Time

Restart Delay Times

Input Characteristics

Output Characteristics

Maximum Input Power . . . . . . . . . . . . . 5 W

Wire Size . . . . . . . . . . . . . Solid or Stranded 10 - 22AWG

Terminal Torque . . . . . . . . . . . .13 in.-lbs

Safety Marks

• cULus Listed . . . . . . . . . . . . . . . . . . . . . .UL508, C22.2 No. 14

Weight . . . . . . . . . . . . . . . . . . . . . . . . 14 oz.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Littelfuse 233P-1.5 PumpSaver Plus Resources

Littelfuse 233P Product Specifications

Littelfuse 233P Installation Bulletin

Littelfuse 233P Engineering Specifications