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Water/Wastewater

Robust Protection and Controls for Water/Wastewater Critical Infrastructure

Littelfuse Industrial Products continuously protect critical water/wastewater operations with robust designs that stand up to harsh conditions such as vibration, H2S, extreme temperatures, and humidity. Littelfuse can help you make system upgrades to enhance safety and protect your equipment.

Water/Wastewater Capabilities

Product Categories for Water/Wastewater

Water/Wastewater Applications

A

Lift stations to pump wastewater from municipalities to treatment plants

Safety

Intrinsically Safe Relay

Pump Protection

Notification

B

Water tower pumps to keep tanks full of fresh water

Safety

Motor Protection

C

Water tower pumps to keep tanks full of fresh water

Safety

Motor and Pump Protection

Industrial Controls

D

Odor control systems with switchgear and motors

Safety

Motor and Pump Protection

Notification

Flashers

E

Water wells and pumping stations containing booster pumps, switchgear and MCC to move fresh water, wastewater and treated water

Safety

Motor and Pump Protection

Notification

Flashers

F

Storm-water pumping stations to move water runoff from reservoirs to irrigation systems

Motor and Pump Protection

Notification

Industrial Controls

Protect Valuable Equipment

Motors and Pump Controls are used in lift stations, booster stations, treatment plants, water well pumps, and more. Motor/Pump Protection is used in single- and three-phase water well pumps, center pivot irrigation, and aerators. Timing Controls are used in single- and three-phase motors in water well pumps, center pivot irrigation, and in water and wastewater treatment plants.

Littelfuse Product & Part Number	Benefits	Features	Competitor Part Numbers
201A-AU , 460 Three-phase voltage monitors	Protects motors from adverse voltage conditions, which damage the motor windings.	201A-AU 8-pin plug-in style. DIN-rail or surface mountable via OT08PC octal base. 460 Standard surface or DIN-rail mountable. Protects from phase loss, low and high voltage, voltage unbalance, and phase reversal and rapid cycling conditions. Universal range from 190-480 VAC and 50/60 Hz. Transient protection meets IEEE and IEC standards. Adjustable nominal voltage, trip delay, restart delay, and unbalance trip provide versatility for a variety of applications.	201A-AU Diversified: SLAXXXASA, SUAXXXASA, SLDXXXASA, SLU 100ASA, PRA100AFA Time Mark: 257B, A257B, 258B, A258B, 257BM, A257BM Macromatic: PMPU 460 Diversified: SLBXXXALEA, SLBXXXALER, SLU100ASD, SLA230ALE, SLCXXXALE, SLJXXXALE, SLMXXXASE, SLIXXXALE, SLMXXXASE Time Mark: series 263, 265, 200, 2642, 2652, 2644, 158, 246 Macromatic: PMDU A-1 Components: EAC-800 series Agastat: PMA series Crouzet: UFR2 series Siemens (Furnas): 470A32X1 (=D, E, G, H, R) Watsco: EAC-800 series RK Electronics: PVC400AR
MP8000 Bluetooth* overload relay	Smart, universal, and enhanced overload relay can communicate directly with smartphones and tablets from Bluetooth. Monitor and control the relay without the need to open the panel.	Stand next to motor–not and relay–and monitor motor startup. Improves safety: monitor the motor from up to 30 feet away. Minimal wiring allows for quick setup. One model works on allsingle- and three-phase motors with operating voltages of 90-690 VAC and more than 700 V via the use of potential transformers.	In some applications, MP8000 can replace some of the Siemens Simocode, Eaton C441 Motor Insight, Franklin Submonitor, Square-D TeSys-T, Rockwell E-3 products and some GE Multilin products. Contact technical support for details.
777-KW/HP-P2 Three-phase voltage and current monitors	Protects motors from adverse voltage and current conditions that damage to the motor windings. Provides underload protection depending on power, which is ideal for pumping applications.	Protects from overloads (of any trip class), underloads. (dry running pumps), low and high voltage, phase loss, phase reversal, and unbalanced voltage and currents. Provides Class II ground fault detection. Optional communications to SCADA	In some applications, 777-P2 series can replace some of the Siemens Simocode, Eaton C441 Motor Insight, Franklin Submonitor, Square-D TeSys-T, Rockwell E-3 and some of the GE Multilin products. Contact tech support for details.

Littelfuse Product & Part Number	Benefits	Features	Competitor Part Numbers
ALT115-S-SW Duplex alternating relay for pumps with one float input	Alternates between two pumps within each demand cycle to balance the runtime of each cycle.	Input voltage 95-125 VAC (24 VAC and 230 VAC models available). Compact design saves precious panel space, uses 8 pin base. Cross connected DPDT relay.	Diversified: ARB120ACA, ARA120ACA Time Mark: 261DX120, 261DXT120 Macromatic: ARP120A3R Crouzet: PJRXS110A Motor Protection Electronics: 008-120-11S
ALT115-X-SW Cross-connected duplex alternating relay for pumps with two float inputs	Alternates between two pumps within each demand cycle to balance the runtime of each cycle.	Input voltage 95-125 VAC (24 VAC and 230 VAC models available). Compact design saves precious panel space, uses 8 pin base. Cross connected DPDT relay.	Diversified: ARB120ACA, ARA120ACA Time Mark: 261DX120, 261DXT120 Macromatic: ARP120A3R Crouzet: PJRXS110A Motor Protection Electronics: 008-120-11S Dayton: 6C052 Multicomp: MCY98 Warrick Controls: AM1A2
PC-105 Five-channel multiple pump controller and relay switch	Operates up to four pumps for a variety of configurations. Provides optional high-level, low-level, and out-of sequence alarms are selectable. Saves panel space, and reduces wiring and labor.	Duplex, duplex SPS, triplex and quadplex pump control. Pump up or pump down functions. DIN-rail or surface mountable.	Diversified: ISO-120-AFN

Littelfuse Product & Part Number	Benefits	Features	Competitor Part Numbers
ISS-105-ISO Five-channel intrinsically safe relay switch	Five-channel relay switch designed for applications with switch inputs in hazardous locations.	Five-channel intrinsically-safe switch LEDs provide proof of input and output activation. DIN-rail mounted. 120 VAC input, AC line frequency 50/60 Hz. for a single-channel version, use our ISS-100 or ISS-101.	ISS-105 & ISS-101 Contact technical support for competitor cross references. ISS-100 Single-Channel Model Diversified:ISO-120-AFN
ISS-105 Five-channel intrinsically safe pump controller and relay switch	Operates up to four pumps in a wide variety of configurations, such as duplex, triplex or quadplex, with selectable alarm output options.	DIN-rail or surface mountable. Finger-safe terminals. Duplex, duplex SPS, triplex and quadplex pump control. Pump disable switches and pump up or pump down control.	Diversified: ARM-2003, ARM-2010, ARM-2011, ARM-120-AFE, ARM-120-AFEP, ARM-120-AAE, ARM-120-ABE, RM-120-ACE, ARM-120-ADE, ARM-120-AGE, ARM-120-AHE, ARM-120-AJE.

Littelfuse Product & Part Number	Benefits	Features	Competitor Part Numbers
201-100-SLD Seal-leak detector	Detects seal leaks submersible pumps to prevent damage.	LED Status Indicator. 4.7 k to 100 kΩ adjustable sensitivity. 8-pin plug-in style. DIN-rail/surface mountable via octal base. Use 460-15-100-SLD for a surface or DIN-rail mount application	Time Mark: 409 Macromatic: SFP120A100 Diversified:SPM120AAA100K
PC-102CICI-DL Dual-channel seal-leak detector	Designed for use with two submersible pumps. Detects seal leaks in pumps to prevent damage.	Two form c-isolated contacts with LED status indicator. 4.7k to 100kΩ adjustable sensitivity. DIN-rail or surface mountable.	Macromatic: SFP120C100 (8-pin plug-in) Diversified: SPM120ABA100K (8-pin plug-in) Time Mark: 4092-120 (8-pin plug-in)

Littelfuse Product & Part Number	Benefits	Features	Competitor Part Numbers
FS126 & FS126RC Pump control panel flasher	Flashes an alarm indication light and/or pulse an audible alarm when a high level condition occurs.	Fixed-flash rate 75 FPM. 1A AC, fullwave output. Input voltage 120 VAC. Compact size. CE and CSA Approved; UL Recognized	FS100 series (e.g. FS126, FS126RC) can replace multiple flashers from Airotronics TEKR, Infitec TFS, Artisan 4210, Amperite DF and Diversified’s ETN series. Contact technical support for details.

The FS126 is designed for incandescent and resistive loads, such as lamps or small heating elements. The FS126RC can also be used with inductive loads like electromechanical relays, contactors, small motors, and transformers.

Littelfuse Product & Part Number	Benefits	Features	Competitor Part Numbers
KRDM421 Delay-on-make timer KRDB421 Delay-on-break timer	Provides a debounce delay (for turbulence) and prevent rapid cycling of a pump, or to eliminate contactor chattering, which can be caused by a defective float switch. Extends the runtime of pumps (when necessary) after demand is met.	On-board knob adjusts delays from 1–100 s. 10 A, SPDT output contacts, 2 in. x 2 in. panel-mount package. Input voltages 120 VAC, AC line frequency 50/60 Hz-. Solid-state timing circuit provides excellent repeat accuracy and stability. Fully encapsulated to protect against shock, vibration and humidity	KRDM421 Macromatic: THR-10262-31 Airotronics: TGC10100A1 Ametek NCC: Q1T-00060-341 KRDB421 Macromatic: THR-11662-31T Airotronics: TGML10100A1 Diversified & Time Mark: Several options are available (Contact technical support for details)

Littelfuse Product & Part Number	Benefits	Features	Competitor Part Numbers
FLNR_ID, FLSR_ID, LLNRK, LLSRK_ID, series U L class RK5/RK1 fuses JTD_ID series U L class J fuse CCMR series U L class CC fuse	Allows for motor startups while providing optimal short circuit and overload protection for critical motor and pump applications.	Class R fuses offered in 250 VAC (FLNR_ID/LLNRK) and 600 VAC (FLSR_ID/ LLSRK_ID) options up to 600 A. Class J fuses provide similar protection to Class R but in a physically smaller case. Class CC fuses offer the smallest 600 VAC protection available up to the 30 A size. Extremely current-limiting to help minimize potential damage to equipment in the event of short a circuit.	FLNR_ID / FLSR_ID / LLNRK / LLSRK_ID Eaton Bussmann: FRNR / FRSR / LPNRK(SP) / LPSRK(SP) Mersen: TRNR / TRSR / A2DR / A6DR JTD_ID Eaton Bussmann: LPJ(SP) Mersen: AJT CCMR Eaton Bussmann: LPCC Mersen: ATDR

Littelfuse Product & Part Number	Benefits	Features
Definite Purpose Contactors HCC, HCD	Acting as an on/off switch controlled by thermostats, contactors are designed with consistent silver thickness for increased product life.	Termination options include combo screw, screw w with pressure plate, or lug Universal mounting configuration Four adjustment pots provide versatility for a variety of applications Optional auxiliary switches that attached to the contactor on 3P & 4P

Littelfuse Product & Part Number	Benefits	Features
Transformers HCT	Engineered to run more efficiency, our transformer line consists of power ratings up to 250 VA with a variety of primary and secondary voltages to 575 V ac and frequencies at 50 and 60 Hertz.	Provided in three different versions: Class 2 Transformer, General Purpose Transformer, and Autotransformer Termination options include quick connects and lead. Various mounting options available UL/CUL recognized 5085

Littelfuse Water and Wastewater Capabilities Slideshare

Sizing a Neutral Grounding Resistor

One of the most critical decisions when designing stable and safe electrical systems is system grounding. The key parameter that determines the neutral grounding resistor’s affect on the circuit is the let-through current. This video will focus on how to determine what level of let-through current to specify when designing a resistance-grounded system.

Watch the Video

Water/Wastewater Application Guide

Regardless of their function, water and wastewater facilities share one critical system in common. They all use pumps, whether it’s to move water into a plant, or send treated wastewater back into the environment. The motors inside these pumps are subject to damage from electrical hazards that can cause them to fail, resulting in significant downtime and replacement costs. This guide explains how enhanced protection relays can help

Download the Guide

White Paper: Ground Fault Protection and VFDs

Death and injuries make ground (earth) faults one of the most essential hazards to mitigate. High-resistance grounding provides significant protection for equipment and personnel. Unfortunately, when variable frequency drives (VFDs) are used in resistance-grounded systems, the system may not be able to effectively detect low-level ground faults unless the equipment is adjusted accordingly. This paper explains why using VFDs in high-resistance grounding systems can be problematic and provides an in-depth discussion of how they can be overcome.

Download our White Paper

Application Guide: Surge Protection In Panel Design

This guide is tailored to panel designers who wish to strike the balance of form, function, and cost when choosing an industrial control panel’s surge protective device (SPD). It will teach panel designers how the correct SPD size is determined for each of the seven most common types of systems.

Download the Application Guide

Contact Us Today

Water Wastewater

Littelfuse Industrial Products continuously protect critical water/wastewater operations with robust designs that stand up to harsh conditions such as vibration, H2S, extreme temperatures, and humidity. Littelfuse can help you make system upgrades to enhance safety and protect your equipment.