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Littelfuse.com/233P

©2022 Littelfuse, Inc.

Specifications are subject to change without notice.

Revised: 09/30/2022

Motor and Pump Protection Relays

233P 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

265VAC

Undervoltage

190VAC

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

230VAC

Load Range

233P-1.5

1

⁄3 – 1.5 hp

233P

1

⁄3 – 3 hp

Frequency

50/60Hz (Note: 50Hz will increase all delay timers by 20%)

Output Characteristics

Output Contact Rating-SPST

233P-1.5

1.5 hp @ 240 V ac (10 amps max.)

233P

3 hp @ 240 V ac (17 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.

Dimensions

H 73.66 mm (2.9”); W 133.35 mm (5.25”); D 73.99 mm (2.913”)

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.