Protection Relays
Motor and Pump Protection
232-INSIDER
Single-Phase Pump Monitor
Description
The Model 232-Insider single-phase PumpSaver
®
fits inside ¹/
3
,
1/2, 3/4, and 1hp, 230V Grundfos control boxes. The PumpSaver
®
Model 232-Insider is a current monitor designed to protect
single-phase pumps from dry-well, dead-head, jammed impeller,
overvoltage and undervoltage conditions. Typical applications
include residential water wells, commercial water wells,
irrigation wells, and golf course systems.
A calibration adjustment allows the 232-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 232-Insider deactivates its output relay and
directly disconnects the pump motor. The 232-Insider then
begins its user-selectable restart delay (dry-well recovery)
timer. When the timer counts to zero or power is removed and
reapplied, the 232-Insider reactivates its output relay and turns
the pump back on. By leaving the restart delay knob in the reset
position, the 232-Insider will operate in manual reset mode.
Note: The use of flow restrictors or unusually high head pressures at the time of calibration may
interfere with the detection of dead-head conditions. Contact Littelfuse for information on a
product to fit these applications.
Wiring Diagram
232-INSIDER CONNECTIONS IN GRUNDFOS
®
CONTROL BOX
CAPACITOR
BLK
IND. CONT. EQ.
ORANGE
784X
LISTED
RELAY
www.pumpsaver.com
SymCom Inc. Rapid City, SD
1-800-843-8848
RED
YEL
Features & Benefits
FEATURES
BENEFITS
Constant monitoring of voltage and current protects
pumps from dry-well, dead-head, jammed impeller,
rapid cycling, and voltage faults
Allows user to select well recovery time delay after a
dry-well condition occurs, or to select manual reset
Used with the Informer, allows user to see stored
faults, run time, and also troubleshoot the pump while
it’s running
Provides status and diagnostics for troubleshooting
BLK
YEL
L1
L2
*
Y
R
B
Proprietary
microcontroller
based circuitry
Adjustable restart delay
*Note: Move short yellow wire from the 90° terminal on L2 to the 45° terminal on L2.
Built in IR
communications link
LED indication
For installation instructions see the Fresh Water Pumping Catalog.
Specifications
1 Phase Line Voltage (±10%)
Load Range
Frequency
Operating Points
Overload
High Voltage Reset Point
Low Voltage Reset Point
Trip Delay Time (Overload)
Trip Delay Time (Dry well)
Restart Delay Time
Overvoltage/Undervoltage
Delay
All other faults
(dry-well rec. timer)
Output Contact Rating (SPST)
230VAC
1/3-1hp
50*/60Hz
125% of Cal. Point
265
190
5 sec.
2 sec.**
5 sec.
2-225 min.
1hp @ 240VAC (17 amps max.)
Rev: 1-A-062016
Safety Marks
UL
CSA
Weight
Power Consumption
UL508
C22.2 No.14
10 oz.
5 Watts (max.)
*Note: 50 Hz will increase all delay timers by 20%
**Other trip delays and restart delays are available upon request.
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/232insider
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