Protection Relays
Motor and Pump Protection
111P / 233P SERIES
Single-Phase PumpSaver
®
Description
The 111P (115 volt, ¹⁄³ to 1hp), 233P-1.5 (230 volt, ¹⁄³ to 1.5hp),
and 233P (230 volt, ¹⁄³ to 3hp) single-phase PumpSaver
®
relays
protect pumps from dry-well, dead-head, jammed impeller,
rapid-cycling, and overvoltage/undervoltage, whether the
pressure switch is mounted before or after our unit.
A calibration process allows the relay to be calibrated to your
specific pumping application, 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 relay deactivates its output relay and directly
disconnects the pump motor and begins its user-selectable
“Restart Delay” (dry-well recovery) timer. When the timer
expires or power is removed and reapplied, the unit reactivates
its output relay and allows the pump to turn back on.
An infrared LED communicates directly with a hand-held
diagnostic 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 relay’s
terminal size. In these conditions, a short splice of #10 AWG or
#12 AWG may be a solution at the control box.
*All local, state and national electric codes should be followed when applying this solution.
NOTE: The 111P / 233P Series relays 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.
Wiring Diagram
Features & Benefits
FEATURES
Proprietary
microcontroller based
circuitry
BENEFITS
Constant monitoring of voltage, power factor,
current for reliable pump protection
Calibrates unit to your specific individual pumping
application and reduces nuisance tripping
User adjustable sensitivity knob makes the unit
more adaptable to varying pumping applications
Ordering Information
MODEL
LINE VOLTAGE
DESCRIPTION
Onboard calibration
process
Onboard sensitivity
adjustment
111P
111P-ENCL
233P
233P-ENCL
233P-1.5
233P-1.5-ENCL
115VAC
115VAC
230VAC
230VAC
230VAC
230VAC
Load Range: ¹⁄³ - 1hp
111P with NEMA3R enclosure
Load Range: ¹⁄³ - 3 hp
233P with NEMA3R enclosure
Load Range: ¹⁄³ - 1.5hp
233P-1.5 with NEMA3R enclosure
Accessories
Informer
A hand-held diagnostic tool that uses an infrared
receiver to access information which can be
helpful for troubleshooting the system.
© 2018 Littelfuse Protection Relays & Controls
www.littelfuse.com/111p-233p
www.littelfuse.com/
Rev: 1-B-111518
Protection Relays
Motor and Pump Protection
111P / 233P SERIES
Specifications
Functional Specifications
Adjustments/Settings
Overcurrent
Underload (dry-well)
Overvoltage
111P
233P, 233P-1.5
Undervoltage
111P
233P, 233P-1.5
Number of restarts allowed
in a 60-sec. period
(rapid-cycling)
Trip Delay Times
Overcurrent
Dry-well
Restart Delay Times
Over/Undervoltage
All other faults
Input Characteristics
Supply Voltage
111P
233P-1.5, 233P
Load Range:
111P
233P-1.5
233P
Frequency
125% of calibration point
Adjustable (70 to 90% of calibrated run power)
132.5VAC
265VAC
95VAC
190VAC
4
5 seconds
4 seconds
2 seconds
Manual, 2-225 Minutes
115VAC
230VAC
¹⁄ ³ – 1 hp
¹⁄ ³ – 1.5 hp
¹⁄ ³ – 3 hp
50/60Hz
(Note: 50Hz will increase all delay timers by 20%)
Output Characteristics
Output Contact Rating-SPST
111P
233P-1.5
233P
General Characteristics
Operating Temperature
Maximum Input Power
Wire Gauge
Terminal Torque
Safety Marks
cULus Listed
Dimensions
Weight
Mounting Methods
1hp@120VAC (16 amps max.)
1.5hp@240VAC (10 amps max.)
3hp@240VAC (17 amps max.)
-40º to 55º C (-40º to 131º F)
5W
Solid or Stranded 10 - 22AWG
13 in.-lbs.
UL508, C22.2 No. 14
H
73.66 mm (2.9”);
W
133.35 mm (5.25”);
D
73.99 mm (2.913”)
14 oz.
#8 screws
© 2018 Littelfuse Protection Relays & Controls
www.littelfuse.com/111p-233p
www.littelfuse.com/
Rev: 1-B-111518
汽车电子
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