FRESH WATER PUMPING CATALOG
SUBMERSIBLE PUMP PROTECTION LIQUID LEVEL PROTECTION
SINGLE-PHASE & THREE-PHASE PUMP PROTECTION
Fault Damage
Equipment Replacement
Calibration Costs
Compliance Citations
Motor Rewinds
Shock Hazard
Injury to Personnel
Arc-Flash Hazards
Open-CT Hazards
Failed Resistors
Replacement Time
Nuisance Tripping
Intermittent Faults
Unreliable Protection
Calibration Time
CostSafety Downtime
Cover photo of pump (top center) is courtesy of the Department of Water Resources
For All Types of
Environments
Mining
Petrochemical, Oil and Gas
Power Generation
Pipelines and Transportation
Aggregate and Cement
Pulp and Paper
Water and Wastewater
Shore-to-Ship Power
Data Centers
Semiconductor Equipment
Hospitals
Alternative Energy
Manufacturing
We Improve Electrical Safety and Increase Productivity
The Industrial Business Unit of Littelfuse delivers vital products to address
customer needs for protection, safe control and distribution of electrical power in
industrial applications. Our electrical safety product portfolio includes a
comprehensive line of fuses, fuse holders, protection relays, and custom-
engineered electrical products to minimize electrical safety hazards, limit
equipment damage, improve productivity, and safeguard personnel from injury
due to electrical faults.
Technically speaking, professionals in construction, manufacturing, mining, oil &
gas, solar, and many more industries rely on Littelfuse for rugged, lasting
protection for their designs.
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1
Fresh Water Pumping
TABLE OF CONTENTS
SUBMERSIBLE PUMPS - OPTIMIZED PROTECTION
111-Insider-P / 231-Insider-P with Control Box ...................................... 2
Single-Phase Pump Monitor
111P / 233P / 233P-1.5 ..................................................................................5
Single-Phase Pump Monitor
235P ................................................................................................................. 7
Single-Phase Pump Monitor
Abbreviated Installation Instructions .......................................................9
111P / 233P / 233P-1.5 / 235P in Enclosure ............................................11
Single-Phase Pump Monitor in a NEMA box
SINGLE-PHASE & THREE-PHASE PUMP PROTECTION
MP8000 .........................................................................................................12
Bluetooth* Overload Relay
SINGLE-PHASE PUMP PROTECTION
77C-KW/HP (2-800 A) ................................................................................16
Programmable
77C-LR-KW/HP (1-9 A) ..............................................................................16
Low-Range Programmable
THREE-PHASE PUMP PROTECTION
777-P2 Series ..............................................................................................21
Fully Programmable Electronic Overload Relay
777-KW/HP-P2 Series ................................................................................23
Programmable Electronic Power Monitor
LIQUID LEVEL PROTECTION
460-15-100-LLS ............................................................................................32
Liquid Level Sensor Relay (DIN-rail or surface mount)
PC-XXX-LLC-CZ / PC-XXX-LLC-GM Series ............................................34
Liquid Level Control Relays (8-pin plug-in)
TIMERS AND ALTERNATING RELAYS
T10 .................................................................................................................38
Solid-State On-Delay Timer
ALT ................................................................................................................39
Alternating Relay Series
50R-400-ALT .................................................................................................41
Alternating Relay
ACCESSORIES
NEMA-3R-L Enclosure ............................................................................... 42
Metal Electric Box
Informer ....................................................................................................... 43
Hand-Held Diagnostic Tool
*Bluetooth is a trademark of its respective owner.