235P Series - Single-Phase Pump Monitor

External overview image
Roll Over to Zoom
The Littelfuse 235P is designed to protect 5-15 hp, 230V, single-phase pumps from dry-well, dead-head, jammed impeller and overvoltage and undervoltage conditions. A calibration adjustment allows the 235P to be calibrated to your specific pumping applications, thereby reducing the possibility of false or nuisance tripping. A unique microcontrollerbased voltage and current-sensing circuit constantly monitors the incoming power for fluctuations causing overcurrent and undercurrent. When an abnormality, such as loss of suction is detected, the 235P deactivates its output relay and directly disconnects the pump motor.

The 235P 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. An external current transformer is required for operation (sold separately).

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Input Load Range (hp)Output
Form
Termination TypeMounting MethodDimensionsWeight (lbs/g)Overcurrent Trip ClassInput AC Line Frequency (Hz)Maximum Input PowerOutput Load Rating (VA)Overvoltage Trip Voltage (%)Rapid Cycle Timer (s)Restart Delay RangeTrip Delay RangeStockCompare
235P230 Vac5 - 15 (external current transformer required)SPSTTorque: 13 in-lbs; Wire: Solid or stranded 10 - 22 AWG#8 screws2.93 H x 5.25 W x 2.91 D in. (73.7 x 133.4 x 74 mm)0 Kg125% of calibration point50 / 60 (50 will increase all delay timers by 20%)5A300; 720 VA @ 240 Vac (10 A max.)265 Vac4 restarts allowed in 60 s periodOver/Under Voltage: 2 s; All other faults: Manual; 2 - 225 mOvercurrent: 5 s; Dry-well: 4 sCheck
235P-ENCL230 Vac5 - 15 (external current transformer required)SPSTTorque: 13 in-lbs; Wire: Solid or stranded 10 - 22 AWG#8 screws8.3 H x 5.36 W x 3.68 D in. (210.8 x 136.1 x 93.5 mm)0 Kg125% of calibration point50 / 60 (50 will increase all delay timers by 20%)5A300; 720 VA @ 240 Vac (10 A max.)265 Vac4 restarts allowed in 60 s periodOver/Under Voltage: 2 s; All other faults: Manual; 2 - 225 mOvercurrent: 5 s; Dry-well: 4 sCheck
To request product environmental information, please complete the Product Environmental Information Request Form.