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Water Wastewater

Solutions GuideProviding Efcient, Reliable, and Sustainable Answers

Make the most o your energy

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Wateris the goldo the21st century.

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Its a planetary resource that concerns all countries. Schneider Electric has

the solutions this market needs and will enable you to ace your challenges.

The Schnede Electc neto opartners, distributors, system integrators,

panel builders, electrical contractors, water

process OEMs and consulting engineers

operates in every country.

Schnede Electc boosts yo

podctvty th sevces and

soltons that ct opeatn costs :

power quality and power savings

that reduce energy bills

improved process management

or treatment plants, pumping stations,and distribution systems

increased service lie o

process equipment

Schnede Electc edces the desn

cost o yo nstallatons th :

preerred architectures or both

power and control

design tools ranging rom network

calculations to water- and wastewater-

specic drawing packages repetitive solutions

reduced cabling and size

o equipment

$A worldwide company

$23 billion in revenuein 190 countries

local presence in106 countries

more than 200 actories

*Power & Control

offer complies with

international standards

We devote more

than 4 percent o salesto Research and

Development (R&D).

Our 7,300-memberR&D team is vigilant in

ensuring that the waterand wastewater needs are

incorporated into every aceto design and development.

Schnede Electc systes eetNoth Aecan and ntenatonal

elatons and standads.

Theyre sae, dependable, and

environmentally riendly.

Schnede Electc s cotted to

envonental esponsblty and

sstanable developent.

A water or wastewater acilitys sole

purpose is to prepare water or human

consumption, or or return to the

environment. A dramatic irony is thatthese processes also cause harm to the

environment through greenhouse gas and

hazardous wastes production, as well as

electricity consumption.

Schneider Electric is committed to

sustainable development. We do this in

several ways:

provide an energy plan that helps our

customers use as little grid energy as

possible ensure that our products meet the RoHS

(Reduction o Hazardous Substances)

and REACH (Registration, Evaluation, and

Authorization o Chemicals) directives.

create and provide custom designs that

help you lower your operating costs.

Examples include using variable requency

drives on pumps and blowers, so you are

only using energy when you have to; and

using programmable logic controllers thatmaintain memory without a battery, which

removes lithium hazards and replacement

costs, and protects against SSO and

CSO events.

This commitment to sustainable

development will help you reduce

operation, maintenance, and hazardous

waste disposal costs, as well as reduce

your acilitys carbon ootprint.

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DriNkiNg wATEr

DESALiNATiON

PumP STATiONS

wASTEwATEr

wATEr TOwEr

The right answer or yourwater and wastewater

applications

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You want

to optimize design and construction costs 6

You need

to reduce your operating costs 8

You are

looking or reliable water treatment 14

You want

the advantages o a unifed comprehensive

power and automation solution 18

You have

to distribute water 24/7 22

You have

to manage a network o pumping stations 24

You have

to adapt the process to regulation changes 26

Architecture overview 30

You need services 34

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photo

6

You want to

optimize design andconstruction costs

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Schneider Electric has the means to reduce both design and operating costs.

Optimizing costs requires structured design. To help customers achieve this, Schneider

Electric oers proven power and automation architectures, and the design, calculation,

and checking tools needed to adopt them.

Fo desn

Design tools help you quickly and eciently determine your design parameters and

choose equipment to match your needs. As a consequence, design and installation

costs are reduced, and the dierent solutions are easily compared.

Variable requency drives rom Schneider Electric can be supplied with an embedded

controller. With this Controller Inside, you can develop and load your own application,or use our precongured water applications.

to opeatn tools

Collaborative tools allow design, engineering, and commissioning, rom the sensor

up to the Supervisory Control and Data Acquisition (SCADA) system. Combined with

proven methodologies and predened application know-how, these tools provide

support (including operation and maintenance) throughout a projects lie cycle, and

during expansions and process changes. Their unique design and user interace limit

the need or operator and maintenance training.

Concaton

Motor Control Centers (MCCs) also reduce design costs. Using the latestcommunication technologies, intelligent Motor Control Centers (iMCCs) have

smaller components, and reduced cabling to optimize hardware and labor costs.

Design sotware

To provide water on a long-term basis at a reasonable price or the

population, you need to achieve all o your objectives at the lowest

possible cost. O course, you also need to get the maximum number

o ecient inrastructure retrots/expansions rom the money you

have allocated.

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+

8

Electrical energy represents

1/3 o the total operating

costs or water and

wastewater agencies

and utilities

Our water and wastewater

process and energy

eciency experts

You needto reduce youroperating costs

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=

9

Up to a 30%savings in energy

You can reduce your operating costs through load shiting and high-eciency

motors and drives, as well as power monitoring and process optimization.

Our solutions or power management and control can reduce your energy

consumption by up to 30 percent.

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Electrical energy may account or as much as 30 percent o your operating costs.

Three aspects o energy eciency should be considered or a high level o power quality :

Energy Savings > reduced consumption or all types o operations

Energy Cost Optimization > reduced cost or the energy usedby the dierent operations

Availability and Reliability > coupling design strategy with proper maintenanceand operation can provide enhanced reliability, ewer

outages, and sustained energy savings

Soltons o eney savns

The latest generation o low-loss transormers

and high-perormance motors improves

system eciency by up to ve percent.

When high-power motors are requested

(>500 HP), the use o a medium voltage

(MV) supply reduces line currents, thus

reducing the watts lost in transormers,

cables, and motors. A low voltage (LV)

supply may become cost prohibitive

because o the limited availability o

equipment, or due to that equipments

prohibitive size and need or multiple sets

o cables.

Variable-requency drives are used to great

advantage in pumping applications.

>>>By adjusting the speed o rotation,

the absorbed electrical power may be

reduced by 50 percent at 80 percent onominal fow.

In water and wastewater installations,

harmonics are mainly generated by

variable-requency drives, ozone

generators, and UV electronic ballasts.

These should all be careully managed to

avoid resonance, particularly when power

actor correction capacitors are present.

Increased current demands and nuisance

tripping are the most requent adverse

consequences o harmonics. SchneiderElectric can provide assistance and

solutions or harmonic management

in compliance with utility regulations.

System eciency

improved by up to 5%Cost-saving

evaluation sotware

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Soltons o eney cost optzaton

The cost or energy consumption may

be reduced in dierent ways.

Power actor correction provides

several advantages:

avoids invoicing o reactive energy

by the utility

reduces current demand eliminates transormer oversizing and

allows the ull system capacity to be used

Power factor correction is generally achieved

through the use of capacitor banks.

Power-monitoring devices are used

or three main reasons :

to know which parts o the acility

consume the most power

to monitor energy eciency

to analyze system harmonics

Three types o technologies are available :

stand-alone power monitor

LV and MV protection relays

High-perormance metering units

*Soft starters

are available in a wide

range o power ratings, and

are particularly suitable or

pumping and other water

applications. Multiplexing is

commonly used or cascading

start-ups and decelerations o

multiple motors. This provides

the ollowing advantages:

less mechanical stress

at motor start-up, thus

improving reliability

controlled torque

at motor stoppage,

preventing water hammer

and damage to pipes

power peak shaving,

preventing penalties

reduced losses atmotor start-up

Data rom metering and protection devices,

as well as a suite o other devices can be

transmitted using transparent-ready Web-

enabled power and control equipment rom

Schneider Electric.

Pocess danostcs and optzaton

Detecting problems as early as possible

avoids process downtime and reducesoperating costs. Schneider Electric oers

easy-to-use diagnostic tools that quickly

access important inormation, such as the

root cause and process values needed to

x a problem.

At the SCADA level, tools such as Process

Analyst are available to create reports and

analyze data that can then be used to

optimize the process and reduce

electricity consumption.

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You are lookingor reliable watertreatment

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A variety o technologies is required to make water

produced by springs, aquiers, lakes, rivers, and

oceans drinkable. Available space and the volume

o water to be treated aect technical choices

subsequently made in order to meet water quality

regulations and authorities contracts.

Automation systems and electrical networks must be

studied to provide high perormance and availability.

The solution must include sotware and hardware

architecture with redundancy at all levels:

relablty aects poe as ell as atoaton

A high level o reliability is required or all parts o an application

identied as critical, and may include redundancy or :

power architecture and standby generators

uninterruptible power supply (UPS required)

motor control and programmable logic controller (PLC)

communication and supervision control

and data acquisition (SCADA)

Poe soltons

Dierent circuit congurations can be selected, as listed here

in increasing order o power availability :

radial single eeder

secondary selective

loop eed (primary selective)

The implementation o backup generators is very common in

water and wastewater treatment plants where water distribution

cannot be interrupted or periods longer than a ew minutes.

Instantaneous throw-over is not necessary, as storage tanks

are generally present. Automatic transer switches are naturally

associated with generators or rapid throw-over and smooth switch

back to normal supply.

Protection coordination is a key tool in improving

supply continuity. It ensures:

isolation between unctional units so

grid problems dont stop biological treatment

coordination o motor protection and control,

minimizing downtime

+Essential to the continuous

operation o water andwastewater treatment

acilities, UPSs protect process

controllers and monitoring

and control rooms rom power

outages. Schneider Electric

provides high power UPSs or

control rooms and small units

or eld automation devices.

For a critical application

such as UV and ozone, a

ully secure power solution

can be engineered, with

relevant redundancies,

UPSs, and switchgear.

APC SMART-UPS RT

1500VA 120V

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Coalaton / Flocclaton Sedentaton

+Redundant PLC, the

heart of a process with

consistent reliability

The hot standby PLC rom

Schneider Electric is designedor your sensitive applications

that require high-control

system reliability, and orwhich interruptions are

unacceptable.

Remarkable perormance,transparent switchover, and

communication ensure your

24/7 services.

Atoaton soltons n ate teatent

ra ate

Programmable logical controllers Variable-requency drive

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Dsnecton

Chlorination

Ozonation

UV radiation

17

Fltaton

Sand

Activated carbon

relablty anly ocses on the ollon thee levels

SCADA On the SCADA side, Schneider Electric oers seamless, integrated, and scalable

redundancy that can be expanded to avoid not only network errors, but also PC

hardware errors. The result is a highly optimized and available solution.

Neto Ethernet, which has proven itsel to be the industry standard, provides the solution

or communication architectures requiring high levels o availability. Communication

can easily be adjusted to the required level, such as redundant media and/or network

interaces, sel-healing ber optic rings, and communication backups.

ContolAdding a redundant processor can increase the system reliability. I the primary

processor experiences an outage, the secondary processor will assume control in

a smooth, seamless action. A dedicated Ethernet ber link is used to keep the two

processors in sync. Further redundancy is achieved by using redundant power supplies

and redundant I/O.

Atoaton coponents o hash envonentsHeadworks, biosolids, chemicalstorage areas, and remote pump stations are some o the harsh environments

encountered in water and wastewater acilities. Unless properly protected, these

environments can shorten the lie o equipment. Conormal coating is one tool Schneider

Electric oers to protect equipment rom chemical and corrosive environments.

Dnn ate

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You want the advantageso a unifed comprehensive

power and automationsolution

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In complex processes such as membrane ltration, integrated solutions

or power and control are required to reach the expected perormance

level. Thereore, a large amount o process inormation must be

exchanged between dierent parts o the plant.

For such applications, Schneider Electric provides dedicated water-

solution architectures and tools covering the complete project lie cycle,

rom design to operation and modernization.

ntellent moto Contol Centes (mCC)

Overall perormance o motor control could be improved by using

type-tested equipment that oers :

seamless integration into the control system

reduced downtime through predictive maintenance

actory-tested solutions

reduction o space, installation time, and maintenance

easy addition or modication o eeders while energized

Collaboatve Contol Syste (CCS)Water and wastewater applications predominantly use the ollowing:

controllers

SCADA systems

instrumentation

drives

sensors and I/Os

All these devices must be integrated, congured, and optimized during commissioning

and operation. Schneider Electric collaborative tools handle each o these while reducing

integration costs. Proven application knowledge has been integrated into libraries, ensuring

excellent quality and standardization which, in turn, provides consistent user interaces,

operating modes, and diagnostic capabilities that reduce training and maintenance costs.

>>>

Third-party

Instruments

Intelligent Motor

Control Center

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mebane ltaton

Reverse osmosis is the most common

technique used or desalination, and is an

alternative to distillation. It may also be used

to recycle water to produce drinking water

rom wastewater. Nanoltration is another

method to produce drinking water rom

surace water.

Membrane ltration is an emerging watertreatment technology, or both industrial and

public use. The reduced space needed or

the plant and its ability to treat all types o

raw water are key drivers.

Membrane and other technologies have

led to higher perormance constraints. For

example, reverse osmosis requires high

pressure, and increases electrical energy

use and the need or high power motors.

Electrical distribution and motor control are

thereore signicant parts o the process.

While the cost and eciency o membranes

have greatly improved, working with them

requires special care.

Strict water pre-treatment is necessary

because o their sensitivity to some

pollutants. In addition, membranes may

deteriorate unless they are maintained

under high pressure. Consequently, power

interruptions should be avoided as much

as possible. Power and control are highly

interconnected.

Evolvn technoloes

1 Hair, mold

2 Bacteria, suspended matter, grease

3 Organic matter, proteins, viruses

4 Divalent ions, sugars, coloring agents

5 Monovalent ions, salts

Ln to the nstentaton

An instrumentation link based on

standardized protocols enables

signicantly improved mastery o

complex ltration processes. Extensive

process eedback and access to device

parameters increases perormance

and diagnostic capabilities. Asset

management tools with standardizedinteraces allow access to devices

and a broad range o parameters and

diagnostic inormation. Preventive

maintenance reduces unexpected

downtime and operating costs, and

improves reliability. Service-oriented architectures and open protocols guarantee an ecient solution.

Corporate network

Enterprise

manager

Facility

portal

Computerroommanager

Processmanager

Powermanager

Buildingmanager

Controlnetwork

Devices ancontrollers

Actuatorsand senso

Water

Sand lters

10 m

Microltration

0.1 m

Ultraltration

0.01 m Nanoltration

0.001 mReverse osmosis0.0001 m

2

3

4 5

1

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Increase pumping station reliability and perormance levels

You have todistribute water24/7 . . .

Pumping station andcontainment reservoir

Treatmentplant

Storage oroverpressure station

Consumption

Discharge intothe naturalenvironment

Desalination

plant

Wastewatertreatment

Wastewaterlit station

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Schnede Electc oes addtonal advantaes thoh

a set o nnovatve soltons o ppn statons :

inceased avalablty and peoance th lt-dve

soltons o booste statons

One way to increase system availability is to use multiple, variable-

requency drives. Schneider Electric oers a pre-developed,

constant-pressure system in which one pump has a variable-

requency drive (VFD) with an embedded programmable controllercard. The other motors are constant speed, and use starters or

sot starts. Based on signals rom the VFD, the system will adjust

the drives speed to meet pressure, start additional pumps when

necessary, and provide a runtime-based, lead/lag rotation to

account or constant speed bumps. This solution oers seamless

control and potential cost savings.

Another cost-eective and ready-to-use solution eatures

two pumps (either across-the-line or by sot starts), and an

all-in-one controller with pre-programmed sotware.

Signicant pressure is required to pump water throughout cramped

urban areas and remote rural zones. To get it, drinking water distribution

systems rely on booster stations. Designed to accommodate users

constantly shiting water demands, these stations employ xed- and

variable-technologies, controllers, medium- and low-voltage motor

controls, and power distribution equipment. In all cases, perect

integration into the electrical and automation networks is necessary.

Voltae ppn staton

Lo-voltae ppn staton

machne oo

ContolPp 1

ContolPp 2

ContolPp N

Ethenet TCP/iP edndant

med voltae oo

Variable-requency drives

Across-the-line or sot starters

RTU

Pressuretransducer

Optionalfowtransducer

Optionalpressuretransducer

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You have to managea network opumping stations Oten, water sources are ar rom consumption points. In addition,

wastewater collection is required, and coordination between pumping

stations is necessary to manage water fow. This can create unique

problems in remote locations, extensive and/or poor communication

networks, dicult and expensive maintenance, and less-accessibleelectrical energy.

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APC SMART-UPS RT 1500VA 120V

+Schneider Electric

access control and

video security offer

Even beore the heightened

awareness brought on by

terrorist threats, many public

and private institutionshad begun incorporatingvideo security into critical

inrastructures.

Video technology provides

the visual images necessaryto improve situation aware-

ness, deter vandalism,

thet, or other crime, andaccelerate response and

management decisions.

Due to their obvious

importance, water and

wastewater treatmentacilities have increasinglyturned to electronic

security systems.

Teleety syste

Pelco ISCW Sarix Surveillance Camera

25

A teleety syste s the anse

All links between remote sites are periodic and characterized by exchanges triggered by

cyclical polling rom the central system, due either to operator request or the occurrence o

an event :

data transmission between remote sites and the central supervisory system (SCADA)

communication protocols (Modbus/TCP, EtherNet/IP, DNP3, Modbus, etc.)

media (cable, radio, GSM modem, Internet, etc.)

handling o time-stamped events, measurements, and buering o data

in case o interrupted links

reote tenal nt (rTu) nctonalty nteated n odla,

poaable loc contolle (PLC)

RTU unctions and PLC fexibility orm the basis o the integrated Schneider Electric oer.

Oering master and slave communication opens the door to dierent architectures. Our

solutions are based on reliable and industrially proven hardware designed or the harsh

environment o water wastewater pumping stations. The Modicon PLC range oers many

ways to meet the myriad requirements.

SCADA: the cental pont

Due to pumping networks vast size, monitoring, operating, and maintaining them requires

seamless communication integration. Our oer includes standard SCADA eatures such

as scalability, reporting, redundancy, and diagnostics. With specic RTU unctions such

as multiple protocols and the handling o modems, time-stamped alarms and data are

included. For processing using Microsot Oce or standard reporting tools, data can easily

be exchanged in SQL, Oracle, and other ormats.

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You have to adapt theprocess to regulationchanges

Sceenn/Ppn gease and t eoval Pay clacaton

waste dsposalGrit

Grease

gas and eaent njectStorage/Dosing

Compressors

unteated

asteate

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New regulations are raising water quality requirements nationwide.

Meanwhile, the quantity o inormation that must be analyzed, processed,

and acted upon increases constantlyrequiring new or improved

biosolids, air, and biological treatment units in many wastewater treatment

plants. The fexibility and evolution capabilities o PLC-based solutions

rom Schneider Electric make them suitable or the unctional unit

improvements required in the treatment process.

>>>

Bolocal teatentBacteria/Activated sludge

Seconday clacaton

Slde pocessnDigestion

Stabilization

Thickening

Dewatering

Incineration

A teatentVentilation

Scrubbing towers

Qalty

easeents

and dschae

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Dstbted contol achtectes

Distributed control architecture allows OEM-provided packaged plants to easily be

incorporated into the main control system. Its structure o independent unctional

units, each equipped with a modular PLC connected via an industrial network to

the SCADA system, provides a reliable and fexible solution. Such architectures can

easily be modied or expanded by adding new unctional units. Data exchange and

synchronization are based on standard, industrial Ethernet protocols. Our solutions are

based on reliable and industrially proven hardware, designed or the harsh environment

o water and wastewater treatment plants.

Atoaton slands as an nteaton plato

The easy integration o digital and analog signals, motor starters, and variable-requency

drives is the key to improving and adapting water and wastewater process applications

in a fexible way. Compatibility with various networks and eld busses allows device

layout standardization; only the communication interace has to be adapted. This

standardization leads to greater fexibility and cost savings at the engineering, bidding,

and commissioning stages.

Eectve SCADA syste to onto, analyze, and optze the ate pocess

To reach the quality levels set by regulations, the SCADA system has to log and treat all

relevant process inormation used to monitor a plant. SCADA systems rom Schneider

Electric log data in standard ormats such as SQL and Oracle. Also, our ProcessAnalyst is the perect tool or analyzing data such as measurements, alarms, and digital

data sources in a single environment. The intuitive user interace quickly provides the

operator with the relevant inormation.

Electcal dstbton and oto contol etots

Schneider Electric oers electrical distribution equipment retrots to meet the

increased quality requirements. For example, modern equipment with embedded

power monitoring and communication can be implemented or better, and easier,

energy management. And adaptive, variable-requency drives allow or easier process

adjustment and more accurate process control.

Latest PLC technoloesScalable migration is one o the key eatures o Schneider Electrics PLC range:

Existing inputs/outputs can be kept; a new generation o processor provides new

services and increases the perormance o the application.

Even when all the hardware has to be changed, the sotware can be converted and

reused with the latest hardware to benet rom the new eatures. All these retrot

eatures provide fexibility, high perormance, and cost eectiveness or the process

control, and protect previous investments.

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Inhabitants 1,000 10,000

Million gallons per day (MGD) 0.22

Motors 16

Power demand 15150 kW

Instruments 10


Million gallons per day (MGD) 220

Motors 50


Instruments 100


Million gallons per day (MGD) 20200

Motors 200

Power demand 1.515 MW

Instruments 300

Inhabitants 500,000 and up

Million gallons per day (MGD) 200 and up

Motors 500

Power demand 15+MW and up

Instruments 1,000

Architecture overview

Water treatment plants

From an automation and

power system designstandpoint, the size o a

treatment acility oten is

more important than whetherit is used or water or

wastewater.

Thus, we can divide the

plant type into our broadcategories based on daily fow

and the number o equivalentinhabitants.

Each category shows asuggested automation

philosophy or a acilityo that size.

T1Small treatment acility

T2Medium treatment acility

T3

Large treatment acility

T4Extra large treatment acility

30

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Remote pump station

Pump stations can be

categorized into three

types. These types are

broken down by the

number of pumps.

For each pump station type,

Schneider Electric has an

integrated power and

automation architecture.

Number o pumps 2Power demand < 500 kW

Instruments 4

Number o pumps 4


Instruments 12

Number o pumps 5+Power demand 500+ kWInstruments 50

Water pumping stationsoverviewarchitectures P1

Small liting, pumping, and tank station

P2Pumping and small booster station

P3

Booster or complex pumping station

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You needservices

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Our network o qualied partners, distributors, and service centers are

at your disposalable to provide a unique power and control services

oer in any country. Wherever you happen to be, we are ully able to

support your water process throughout its lie cycle, rom the design

stage through operation and modernization.

Desn sevces

To ensure ecient solutions or your project

and high-perormance operation:

consultancy and expert services

energy eciency solutions

critical power solutions

Opeatn sevces

To reduce operating costs, avoid application downtime,

and maintain perormance level:

maintenance and spare parts management

site audits and repairs training

Eney and etot sevces

To reduce risks ater a long period o operation and improve the perormance

o applications, we oer services to redesign and modernize your power and

control base:

diagnostics and easibility studies

retrot expertise and consultancy

project support

energy audits

A fexble appoach

Our systematic approach to retrots is the key to extending equipment lie at a raction o

the replacement cost. We can replace or recondition LV and MV circuit breakers, develop

switchgear retrot solutions, and replace or repair drivesregardless o the

original manuacturer.

We conduct power quality and harmonic studies to identiy criteria that can reduce

equipment lie and interere with reliable operation. As the upgrades come online, our

installation services veriy that the new equipment is properly installed and ready to meet

optimum perormance standards.

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Schneider ElectricNorth American Operating Division

1010 Airpark Center Drive

Nashville TN 37217

2009 Schneider Electric, All Rights Reserved. Schneider Electric,

APC Make the most o your energy Pelco Modbus/TCP DNP3

9510 sm 0901

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