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Littelfuse Inc.
202 Series
Littelfuse Inc.
231-Insider-P Series
Littelfuse Inc.
250A Series
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231-Insider-P Series

Single-Phase Pump Monitor

Littelfuse Inc.

The Littelfuse 111-Insider-P single-phase products fit inside 1/3 and 1/2, 115V control boxes and the 231-Insider-P fits inside 1/3, 1/2, 3/4, and 1 hp, 230V control boxes. Both models 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.

  • Circuit:SPST-NO (1 Form A)
  • Contact Rating @ Voltage:17A @ 240VAC
  • Delay Time:Fixed, 4 Sec, 5 Sec
  • Mounting Type:Chassis Mount
  • Operating Temperature:-40°C ~ 55°C
  • Output Type:Relay
  • Trip Range:190 ~ 265V AC
  • Trip Status:Energized High/Low
  • Type:Voltage Sensing AC
  • Voltage - Supply:230VAC

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231-INSIDER-P231-INSIDER-P1-PHASE PUMPSAVERPLUS/230V/ FO Voltage Sensing ACEnergized High/Low190 ~ 265V ACFixed, 4 Sec, 5 SecRoHS

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