© 2019 Littelfuse, Inc.
Protection Relays
Motor and Pump Protection
www.littelfuse.com/111insiderp-231insiderp
Rev: 2-C-042619
Description
The Littelfuse 111-Insider-P single-phase products fit inside ¹⁄
³
and
½ hp, 115 V control boxes and the 231-Insider-P fits inside ¹⁄
³
, ½,
¾, and 1 hp, 230 V 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 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. By leaving the restart delay knob in the reset
position, the unit 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.
NOTE: The 111/231-Insider-P models 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.
Features & Benefits
FEATURES BENEFITS
Proprietary
microcontroller
based circuitry
Constant monitoring of voltage and current protects
pumps from dry-well, dead-head, jammed impeller,
rapid cycling, and voltage faults
Onboard sensitivity
adjustment
Allows user to adjust the current sensitivity for the
dry-well / dead-head trip point from 70 % - 90 % of
the full load.
Adjustable restart delay
Allows user to select well recovery time delay after a
dry-well condition occurs, or to select manual reset
Built in IR
communications link
Used with the Informer, allows user to see stored
faults, run time, and also troubleshoot the pump while
it’s running
LED indication Provides status and diagnostics for troubleshooting
Wiring Diagrams
See next page.
Accessories
Informer
A hand-held diagnostic tool that uses an infrared
receiver to access information which can be
helpful for troubleshooting the system. Includes
the Informer IR Kit-12
Informer IR Kit-12
12” infrared adapter cable attaches to the face of
the unit to provide remote diagnostics without
opening the panel. Included with the Informer
Ordering Information
MODEL VOLTAGE DESCRIPTION
111-Insider-P 115 V ac ¹⁄
³
- ½ hp, includes IR Kit-12
231-Insider-P 230 V ac ¹⁄
³
- 1 hp, includes IR Kit-12
111-INSIDER-P / 231-INSIDER-P
Single-Phase Pump Monitor
*Pentek, Franklin, Grundfos, Flowise Pro, and Flint and Walling are trademarks of their
respective owners.
© 2019 Littelfuse, Inc.
Protection Relays
Motor and Pump Protection
www.littelfuse.com/111insiderp-231insiderp
Rev: 2-C-042619
Specifications
Functional Specifications
Adjustments/Settings
Overcurrent 125 % of calibration point
Underload (dry-well) Adjustable (70 to 90 % of calibrated run power)
Overvoltage
111-Insider-P 132.5 V ac
231-Insider-P 265 V ac
Undervoltage
111-Insider-P 95 V ac
231-Insider-P 190 V ac
Number of restarts allowed
in a 60-sec. period
(rapid-cycling) 4
Trip Delay Times
Overcurrent 5 seconds
Dry-well 4 seconds
Restart Delay Times
Over/Undervoltage 2 seconds
All other faults Manual, 2-225 minutes
111-INSIDER-P / 231-INSIDER-P
MODEL 231/111
INSIDER-P
BLUE
FIGURE 5: Pentek
®
Control Box with the PumpSaver
®
Plus Installed
PENTEK* CONTROL BOX WIRING DIAGRAM FRANKLIN* CONTROL BOX WIRING DIAGRAM
111-Insider-P/231-Insider-P
in Franklin
™
Control Box
SOLID-STATE
SWITCH
B(MAIN) Y(COMM)
BLK
RED
ORANGE
YEL
R(START) L2 L1
BLUE
111/231
INSIDER-P
Wiring Diagrams
Input Characteristics
Supply Voltage
111-Insider-P 115 V ac
231-Insider-P 230 V ac
Load Range
111-Insider-P ¹⁄
³
– ½ hp
231-Insider-P ¹⁄
³
– 1 hp
Frequency 50/60 Hz (Note: 50 Hz will increase all
delay timers by 20 %)
Output Characteristics
Output Contact Rating-SPST
111-Insider-P ½ hp @ 120 V ac (17 A max.)
231-Insider-P 1 hp @ 240 V ac (17 A max.)
General Characteristics
Operating Temperature -40 °C to 55 °C (-40 °F to 131 °F)
Maximum Input Power 5 W
Safety Marks
cURus* UL 508, C22.2 No. 14
Weight 10 oz.
Mounting Methods Inside a Pentek*, Franklin*, CentriPro*,
Grundfos* (mfg after mid-2014), Flowise Pro*
and Flint and Walling* control box
**The 111-Insider-P and 231-Insider-P are agency approved type 3R control boxes when installed
as described in the installation instructions. The 111-Insider-P and 231-Insider-P are not intended
to provide overload protection, and should be used with thermally or impedance protected
motors only.