Developments in pumping station control

Developments in pumping station control

L

eve1

switches

times

the

stop pumps

and have the

came

level

pressure.

used since

level

sensors

and

then,

pump. the

relay

brand

-

Pump

to ABS combined

the auxiliary

on

air

start

and

of

a sister

- revolutionized

this

sensing

and

into a simple

unit

relays

are

to

mercury

replaced

type is now

of

drip-shaped

applications

swit-

(Figure

for

providing complete

the input pumping

2). The with

new

indication for

sensors

programmable of levels,

control

of

a

station.

control

advanced

and are built

systems

which

can

he

when

the

pumping

new for

then

different

the to

by

systems

user

the

only

specific

all

such

systems

with

PCs

through

the

remote This different

and

rnakes

them

applications

ured via a dial-up

to directly status,

and

the alarm,

are

according

usable such as:

in

plants

are

system.

need

visit

to check

Pumping

l

Measuring

l

Deposits

Following

l

Irrigation.

current

launched

plants

over

Today

there

is no station

operation

and

to remote

combined

communication

your

pumping

thanks

systems

for

control

the

its

condition,

stations

its

control

with

modern

technologies.

stations

example control

CPU

and

possibilities

real

pumping

Wastewater

PEDE

configurations,

many

achieving

l

to a

the

There

l

very

collect

read

acknowledge

so on.

Water

An excellent

alarm

to and

in

or fixed connection.

signal

l

treatment

is

the com-

It is also possible

to treatment

3). With

he

Internet

visualization

(Figure

‘on-line’

system

Benefits of modern pump control systems

are

can

configured

pany’s PC-based program - UC-COM _ the control system can he config-

30’

is the recently

system from

‘CENTISwedmeter

are just some or possible

future,

Control systems Modern

the

configure

course,

many

and ultrasonic

the

application.

control.

by electro-mechanical

can he combined duties

level has been

where

to he programmed

and

to

enable

and

ches, and piezo-electric sensors

hazardous

defunct

very

(programmable

engineers,

accessed

switch

them

systems,

have

compatible

environmentally

PLC

pre-programmed

Of

20 years ago.

The

making

controller)

needs

the

level

contrast

qualified

the

a part

In

logic controls

a converter

now

Group

1)

register

to

control,

Swedmeter

Cardo

and

with

system,

flexible.

operation

1960s.

(Figure

LISWI

modular

or

stations

hased

were

and a separate

former

the

switches

These

the level

in

way to start

in pumping

been

After

were

only

according

examples

features.

to Joseph

Water

&

Wastewater

Director

at ABS,

In

of the

Azzopardi, Marketing

the imagination

will

he the only restriction.

Start - stop This

is most

pump

common

control.

control

application

A new

of the pumps

option

by measuring

rate of level changes

to avoid

overflow

of pump

stations.

start/stop

method

where

‘water

high

static

the

possible A

soft

is used in situations

hammer’

to an extensive

of

is the

piping

can occur system

due

and/or

head.

Variable speed control ~~~

i:q$_q>~&~*

Ggure 2. Level sensors based on ultrasound.

18

WORLD

PUMPS

December

2002

Here,

level sensors

speed

to meet

sump.

At the

control

inflow lowest

the pump

to the level

pump

the pump

0262 17621021% see front matter 0 2002 Elsev~erScience Ltd. All rights reserved

Figure 4. Local pump controllers

will

stop.

pre-set possible that

By

reducing

lowest

to avoid

can

speed

acceptable build-up

otherwlse

to

value

a

it is

of solids

block

the

in

the

sump

same

cleaning

pump

on

reduces

An

freshwater

pump

Temperatures

for

cleanmg

of the

Electrical by

walls

In pumping

systems

is obtained

can

speed

threshold,

wastage

can

and

At

the

programmed

This

the

pipe

motor

higher

system

is

prices thereby

then

pumping

to meet the

pump

sumps

pump

capacity

dictated

over

the

it would as

energy

energy

energy

between

sump through

by

daily

saving

them

demand.

utilizes

and

parameters

speed

and

to slow down

feature

volume

to stop at this low

to a pre-set

to clean

energy

rate,

costs.

different

also be possible

reservoirs

to

By

This

system

station

with

intelligent

is ideal

in a pumping

two or more system

maximizing the

pumps

and

stops.

running

pumps.

is

time

by alternating

the

will

time

on

the

An

capable

the operating

This

improving pumping

pumps

even each,

reliability

With

knowledge

shape

of the pump

starts

outflow

the

thereby

sation

of

variations

the

station.

curve

regulating

uniform the

flow

the

pump’s

can

be

treatment

trimmed

for

environmental consumption

plant. best

dial-up

performance

to

can

be with

and energy

in mind.

build-up

the pump of grease

sumps

and other

geometric

be

head

these

to avoid materials

pump monitoring

l

Motor

l

In- and outflow

of:

time currents

Pump

Overflow

worldpumps.com

GSM

telephone,

radio

(LAN),

or to a

system

via bi-directional

At the central

whole

system for

com-

command,

is monitored

and

inspection/maintenance personnel.

at start-up,

and head

power input versus flow, it is possible

the

system in

the

calculations.

follow

the changes

time

and

occurred

can for registra-

decide to plan The

of the pump by measuring

of the pumps when

wear

has of

gathered

information

and as foundation

for infrastructure

to

over

for refurbishment

also be used for reporting

authorities

flow capacity

systems

can

planning.

to the load data

n

Joseph Azzopardi ABS PO Box 2056, * S-431 02 Mijlndal, Sweden. Tel: +46-31-836400 Fax: +46-31-184906 E-mail: joseph.azzopardiO abspumps.com www.abspumps.com

rSpecial

www

modem,

CONTACT

control

Running

l

of

the alarms via a fixed line,

a ‘fingerprint’

to authorities.

l

l

of

capable

By making

be

Monitoring Modern

is also

can be made with optimal

report

tion and reporting

unit

of mea-

a transmitter

installation

integrated

making

a logger

and

Compen-

flow can easily

to

cavita-

the inflow,

reported.

Overflow can be measured

provide

Reduction of hydrogen sulphide Controlling

can

the

sump,

impeller

over time.

or Local Area Network

the

according

Overflow a

provided

protection

The

the pumps.

speed

This

alarms.

planning

of the geodetic

program

Uniform flow to the treatment plant By

and

combines

signals

munication.

of

and pump

calculated

unit

to use

Pump flow measurement

of

consumption

suring

control

of all

out

This

transmitting

compensation.

Alternating

by

due to blockage,

Remote control and monitoring

pump

facilitate

windings*

etc.

Energy

Control by energy prices

if the pump

start-up,

accelerated

inflow

hence

be avoided

can be programmed speed.

tion,

a low-

caused

imbalance

with a static head, below

or/and communication.

overload

Vibrations*

also be arranged.

no outflow

in motor

operation

and bearings*

of hydrogen

automatic

spraying

the

the need

and the creation

sulphide.

inlet.

position

walls both

for independent

sensors are required in the pump unit.]

WORLD

PUMPS

December

2002

19