111-Insider-P Series - Single-Phase Protection for Submersible Pumps

231 Insider P Series
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The Littelfuse 111-Insider-P single-phase products fit inside 1/3 and 1/2 115V 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.

Access specifications, certifications, check availability and order parts below

Catalog #Input
Voltage (V)
Input Load Range (hp)Output
Mounting MethodWeight (lbs/g)Overcurrent Trip ClassMaximum Input PowerOutput Load Rating (VA)Overvoltage Trip Voltage (%)Rapid Cycle Timer (s)Restart Delay RangeTrip Delay RangeUnderload (%)Undervoltage Reset Voltage (%)
111-INSIDER-P115VAC1/3 - 1/2 hpSPSTInside a Franklin™ Pente® or CentriPro™ control box0.63 lbs. (10.0 oz. 283.5g)125% of calibration point5W1/2 hp @ 120VAC (17 amps max.)132.5VAC4 restarts allowed in 60s periodOver/Undervoltage: 2s; All other faults: Manual 2 - 225mOvercurrent: 5s; Dry-well: 4sAdjustable (70 to 90% of calibrated run power)95VAC
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