111P / 233P / 233P-1.5 SERIES Protection Relays

PublishTime：2021-08-17

The Littelfuse Models 111P (115 V, ¹⁄³ to 1 hp); 233P-1.5 (230 V, ¹⁄³ to 1.5 hp); and 233P (230 V, ¹⁄³ to 3 hp) protect pumps from dry-well, dead-head, jammed impeller, overvoltage/undervoltage conditions, and rapid-cycle protection whether the pressure switch is mounted before or after our unit.
A calibration adjustment allows the unit to be calibrated to your specific pumping applications, thereby reducing the possibility of false or nuisance tripping. A unique microcontroller-based voltage and current-sensing circuit constantly monitors the incoming power for fluctuations, overcurrent, and undercurrent. When an abnormality, such as loss of suction is detected, the unit deactivates its output relay and directly disconnects the pump motor. The unit then begins its user-selectable restart delay (dry-well recovery) timer. When the timer counts to zero or power is removed and reapplied, the unit reactivates its output relay and turns the pump back on.
The infrared LED 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.
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.
Note: All local, state and national electric codes should be followed when applying this solution.

Brand of Product：	Littelfuse
Part#：	233P-1.5 SERIES 、 233P-1.5 、 233P SERIES 、 233P 、 111P 、 111P SERIES 、 111P-ENCL 、 233P-ENCL 、 233P-1.5-ENCL More Part#
Product Category：	Protection Relays 、 Single-Phase Pump Monitor More
Application：	More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	042619
Version Number：	Rev: 2-C-042619
Data Encoding：
Data Size：	433 KB

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