231-INSIDER-P - 231-Insider-P Series

Series: 231
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Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The Littelfuse 231-Insider-P fits inside 1/3, 1/2, 3/4, and 1 hp, 230V control boxes and are designed to protect single-phase pumps from dry-well, dead-head, jammed impeller, rapid-cycle, overvoltage, and undervoltage conditions.

A calibration adjustment allows the Insider 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 product deactivates its output relay and directly disconnects the pump motor. The relay then begins its user-selectable restart delay (dry-well recovery) timer. When the timer counts to zero or power is removed and reapplied, the relay reactivates its output relay and turns the pump back on. By leaving the restart delay knob in the reset position, the relay will operate in manual reset mode.

The Insider 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 IR Kit-12 (12” fiber optic kit) is included with each Insider, allowing the Informer to access these parameters even when the Insider is enclosed in a control box. This is valuable for troubleshooting the pump while it is running.

Property (Mouseover for details) Value
Input Voltage (V) 230 Vac
Maximum Input Power 5
Input AC Line Frequency (Hz) 50 / 60 (50 will increase all delay timers by 20%)
Input Load Range (hp) 1/3 - 1
Output Form SPST
Output Load Rating (VA) 1 hp @ 240 Vac (17 A max.)
Rapid Cycle Timer (s) 4 restarts allowed in 60 s period
Restart Delay Range Over/Under Voltage: 2 s; All other faults: Manual; 2 - 225 m
Trip Delay Range Overcurrent: 5 s; Dry-well: 4 s
Overvoltage Trip Voltage (%) 265 Vac
Undervoltage Reset Voltage (%) 190 Vac
Overcurrent Trip Class 125% of calibration point
Underload (%) Adjustable (70 to 90% of calibrated run power)
Mounting Method Inside a Franklin™; Pente®; or CentriPro™ control box
Operating Temperature -40° to 55°C (-40° to 131°F)
Weight (lbs/g) 0 Kg
Check Stock Yes
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