235P-ENCL - 235P Series

Series: 235P Questions? Contact Littelfuse Support
littelfuse Motor and Pump Protection Relays
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).

Property (Mouseover for details) Value
Input Voltage (V) 230VAC
Maximum Input Power 5W
Input AC Line Frequency (Hz) 50/60Hz (50Hz will increase all delay timers by 20%.)
Input Load Range (hp) 5 - 15 hp (external current transformer required)
Output Form SPST
Output Load Rating (VA) A300 720VA @ 240VAC (10 amps max.)
Rapid Cycle Timer (s) 4 restarts allowed in 60s period
Restart Delay Range Over/Under Voltage: 2s; All other faults: Manual 2 - 225m
Trip Delay Range Overcurrent: 5s; Dry-well: 4s
Overvoltage Trip Voltage (%) 265VAC
Undervoltage Reset Voltage (%) 190VAC
Overcurrent Trip Class 125% of calibration point
Underload (%) Adjustable (70 to 90% of calibrated run power)
Termination Type Torque: 13 in-lbs; Wire: Stranded or solid 10-22AWG
Mounting Method #8 screws
Operating Temperature -40° to 55°C (-40° to 131°F)
Dimensions 8.30î H x 5.36î W x 3.68î D (210.8 x 136.1 x 93.5 mm)
Weight (lbs/g) 3 lbs. (36 oz. 1 020.6g)