Automalic Kilowatt-Hour Meter Readout

AU T OM ATIC KILOW A TT-HO R 1\1

~TER

RE AD OUT

SlAW TIN G \ 'EN

" nivcrs iti Malaysia Sarawak

2003

TJ 151

5562 2003

Borang Penyerahan Tesis Universiti JVlalaysia Sarawak

RU a BORAN _, PENC ESAHAN STATU TESIS

Judui:

Au

tomalic Kilowatt-H

our Meter Readout

S ESI P£NGAJ IAN: _ _ _ _...;2,.,,0"'0-'-'31"'2"'0-'-'04"---_ _ __

Soya SlAW 'rING WEN

(HI.'RUF BESAR)

meni!2kll membenarkan tcsis '" ini disimp:lll di Pusar Khidll1af Makiumal Akadcmik, lIniversiti Malaysia Saraw<l1.; dlo!ngan syarat-syarat kegu!l:lall seperli bl..'rikut:

I. TeS1S adalah hakmihk Uni\ l'rslti MalaYSia Sil l'ClWak.

2. PUSdt Khidmat MaJ.:IuIllHt Akadcmik. UlliVefSiLJ Malaysia Surawak dibt:llarkan men1iJu<ll snlinan 1I1ltuk tujllan pengajlUll sahaja.

3. I'vlelllbuJl pelJdigil<ln unt uk membangullkan Pangkalun Data Kalldungall Tenll ^:11:111.

4. Pusa Khidnut Maklumal Akademik, Univcrsili Mu!aysia Sar~1w~lJ.. dibenarkan IHcmhuat sal ilHtIl tesis iui ~cb;1gai bahan perlukaran anlar<l in::;tltusi pengajian (ill~gi.

S. *8 Sib tandak~m ( ../ ) di kOlak y,lIlg bcrkenaan

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^{SULIT (Mengandungi olRklurnat yang bCJ'daJ'j,dl kc~cb1ll;ltan nlnu}

kepeolingan Mabysi~ scperti Y<lng lenl1riktub di uaLun AKTA RAHS IA RASM I 197 2)

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^{TERHA D} (Mengandungl maklumal TERHAD y:lIlg 1eb h di tl'n lukan okh organisasi/

badan di ma n:'! penyclidikan dijal:lIlKall).

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Tarikh: 17hb OKTOBI. R C"'O",O""--_ __ Tarikh: 17h OKTOBER 2003

CITATAN

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"­

AUTOMAT JC I(lLOWATT-HO UR METER R EADOUT

SIA W TING WEN

Tes is

ini dikelllll

kakan kepada Fakulti Kejllrllteraan , Uni ve rsiti

Malay

sia Saril wilk

sebilgil

i mem enllhi sebahagiall daripada syarat penga

ugerahan Sarjana Muda

dengan

Ke plljian (Kejuruteraa

n Elektronik dan Kompllte

r)

2003

Thi

s

project

report attached here to entitled "

KILOWATT-

HOUR METER READOUT",

prepared and

submitted

by

Siaw Ting Wen as

a partial

fulfillment of the

requirement

ror the Degree of Bachelor of Engineering with

Honours

(Electronics and CO l11puter) is hereby read and approved by:

Mr. Mo

hd. Saufee Muhaml11ad Date

( Supervisor)

11

DE D[CAT£ O J

For my most beloved pa rents.

y ou r support and care will always be in my heart

III

Acknowledgemen t

First and foremost, the author would likc to tbank God whom be reserve the hi gh est of all praise for all his blessings. Without His abundant love, mercy, guidance and comfort, he will have a hard time for the various difficulties he encountered during the preparation of this project.

Next, the author would like to thank his family, especially his parents, for the love and support. Meanwhile, he also likes to express his sincere and deepest gratitude to bis supervisor Mr. Mohd. Saufee Muhammad. for all his time and guidance for tile author's thesis. He awes much to his valuable guidance, encouragement and advice through his project.

Besides, the author also likes to thank Faculty of Engineering for providing the place and equipment that he need for the project especially during the testing time.

Special thanks must be addressed to the lecturers especially Mr. Martin Anyi and Me Wan Azlan Wan Zainal Abidin for providing some useful information, advicc and help.

Author also wish (0 (hank his friends and course mate Loh Chee Wyai, Chia Yong Seng, Allan, Ting Sie King and Ting Tiew Ong who have been offering sincere help, advice and guidance. Also many thanks are addressed (0 his friends who have been showing much love and concern throughout the project,

Last but not least, author would like to take this opportunity to convey my gratitude to everybody else lilal has contributed directly or indirectly duri ng the thesis preparation.

IV

Abstra ct

Kilowatt- hour meter is

a ve

ry common device that ex ists in most of the buil ding in our society today. Thr ough kilowatt- hour mete r, the electri

ci

ty s uppl ier will be ab le to measure th e amount of power usage ill a pa rticul ar peri od of ti me, by refenin g to the m e ter readout in the respec ti ve meter location. Th is task ca n be hass le some times whe n the kil owatt -me ter is placed in the bui lding and access to the buil di ng is unavailable.

Th

is

project is to design a

system to capt

ure the kilowatt-meler readout automa ti ca ll

y and

that th e dat

a can be stored

in the co mput er. The data re trie

va

l ca n be done thro ugh the compu ter or through the local Pub li c System Te l

epho

ne Network (PSTN).

This paper co

vers the

fu nda ment als an d charac teri sti c of th

e ava

il ab l e comput er por ts, especia tl y the se ria l po rt s whi ch is used in thi s project. The app li ed programm in g techniq ue for this project, which in

clu

des Graphica l User

[nl~rface

(GU\), Mi

crosoft Co

mm Co ntrol

6.0 (MsCom

m) and Te leph ony App lica ti on Program min g Int

er

face (TAP]) also cove red.

It

also in clude

s

the process that are in

vol

ved in de

signing

the project which co nsists of interface

circuit desig

ning, programmi ng, testing and imp l e mentati on. Result

gai

ned are co mpiled together to all ow

^{(h e}

be ller understand in g the rela ti onship betwee n the kilowatt-h our mete r, computer and the TAP !.

v

Abstra k

Meter kilowatt-jam adalah peralatan yang sangat biasa dan bolch didap

ari

di ke

banyakkan bangunan di kalangan masyarakat hari ini. Melalui meter kilowatt-jam,

pembekal elektrik dapat rnengukur jurnlah kuasa clektrik yang telah digunakan dalam suatu

jall~kdmasa

dengan merujuk kepada bacaan meter di lokasi rnasing-rnasing.

Kadang-kala kerja ini boleh menjadi agak sukar jika meter kilowatt-jam terletak di dalam bangunan dan bangunan tersebut tidak boleh dimasukki.

Projek ini ialah untuk mereka suatu sistem untuk mengambil bacaan meter kilowatt-jam secara automatik dan data tersebut boleh di simpan di da lam komp Li

lcr.

Bacaan meter kilow

dll

-jam tersebut boleh di dapati melalui computer

arau

rnel alui

"Public System Telephone Network" (PSTN).

Kertas kerja ini merangkurni asas-asas dan ciri-ciri "computer ports"

terutamanya "serial ports" yang menghubungi komputer dengan meter kilowatt-jam.

Teknik pernporograman yang digunakan dalam projek ini juga rnerangk

urni "Graphical

User Interface" (GUI), "Microsoft Comm Control 60" dan "Telephony Application Programming Interface" (TAP!). Kertas kerja ini juga rnelibatkan pcrekaan litar antaramuka, pemprograman, pengujian dan penggunaan. Keputusan yang diperolehi dikumpul dan diatur supaya mcmberikan pernahaman yang lebih berkcsan mengcnai hubungan di antara meter kilowatt-jam, kornputer dan TAP!.

VI

Table of Contents

Dedicariol1 ^III

A ckllolViedgemellf ^IV

AbSlracl v

Absfrak ^VI

Table of COil tell ts ^VI]

Ust of Figu res ^XI

Lisl of Tables ^XIII

List of Listings ^XIV

Lisl

if

Abbreviariolls xv

CHAPTER J INTROD UCTION

I. I Project Background

1.2 Objectives 2

1.3 Thesis Outline 4

CHAPT ER 2 LIT ERATURE REVIEW

5

2.1

Introduction 5

2.2 T

ypes of

Ki lowatt-hour Meters 5

2.2.1

ME lzr Kilowa tt-hour Meter

5

2.2.1.1

Features 6

2.2 .2

Carrel Precision

Kilowatt-hour Meter 7

2.2

.2. 1

Basic

Spec

ifi

ca

ti ons 7

2.23 Sin gle Phase Electrom

echanica l Kilo watt-hour

Meter (DD28)

8

2,2.4 Conclusion

10

VII

2.3 Basic Stamp (BS) MicrocontrolJer

II

2.3. 1 Basic Stamp Microcontroller Background

II

2.3.2 Architectu

re ofa Basic Sta mp ^II

2.3.3 Basic Stamp Hardware Overview

1

2

2.3.4

Comparison Co

nclu

sion

1

3

2.3.5 Basic Stamp 2 Seri

al Port Programming

13 2.4 Serial Co

mmunicati

on

14

2.4.1 Serial Communicatio

n Concept

15

2.4. 1.1 Synchronous 15

2.4.1 .2 Asynchronous

1

6

2.4.1.3 Bit Rate

1

7

2.4.2 Types of Se rial

Co

mmuni

cation Interface

17

2.4.2.1 RS232

1

7

2.4.2.2 RS422

^{.' ~0}

2.4.2.3 Universa

l Se

rial Bus (USB) 20

2.5 Parallel Communication 21

2.5.1

In troduc ti on

21

2.5.2

Hard

ware Propertie

s

21

2.5.3

Parallel

Port Modes 22

2.5.4 Types ofCol1ll1lunicat

ion Chose

n In Tbis Project 23

2.

6

Rev

iew Types of So

ftware Being Used 23

2.6. 1 Microsoft

Visual

Basic 6.0 24

2.6.

1.1

Microsoft Comm Con trol (MsComm) 24

2.6.

1

2 OnC0I11111

Comm

unication 25

2.6

.2

Microsoft T API 28

2.6

.2.1

Device Classes 30

2.6. 2.2 Add ress Assignments

31

2.6.2.3 Media Acc

ess

31

2.6.3 Modems and T API 32

2.6.3.1 Basic Data Modems 32

2.6

.3 .2

Data Modems

wi th Voice

33 2.6.3

.3

Telephony Card

s 33

2.6.4 Microsoft Vis

ual Basic 6,0 TAPI Application

34

2,6.4.1 Making a Ca ll 34

2.6.4

.2

Answering a Ca ll

37

VIII

2.7 Sensors

2.7.1 Light Dependent Resistor (LDR) 2.7.2 Phototransistors

2.7.3

Photodiode

CIIAPTER 3 I'ROJECT DESIGN AND ANALY. IS

3. 1 In

trod

uction

3.2 Hardware Design 3.2. 1

Se

nsor

3.2.1.1 Sensor Transmitter Circuit 3.2.1.2

Sensor Input Ampl ifier

3.2 .2 Power Supply

3.2.3 Seri al

Communication

3J

So ftware

Design

3.3. 1 PBASrC Source Code 3.3.2

Visual Bas

ic Source Code

3.3.2 . 1 3.3.2.2 3.3.2.3 3.3.24

MainOutput FOIm

About

Fo

rm History Form TAPI

CHAPTER 4 RESULTS AND DISCUSSIONS 4.1 Results

4.2

Hardwa

re Testing and Troubleshooting - Interface A 4.2.1

The 5V

Rcgulator Circuit

4.2.2

Se

nsor Receiver Circuit 4.2.3

Se

rial Output to the PC

4.3 Software

Debugging and Tro

ubleshooting 4.3. I

MsCornrn

4.

3.2 Seven Digit Di

splay 4.3.3

TA

P I (Interface B) 4.3 4

Database

Storage

38 38 38

39

40 40

42

42 42

42 43 -14

45 45

47 S I 53

53 S5

S8 58

S8 58 59 60 60

61

61 62 64

IX

CHAPTER 5 ONCLllSIONS AND RECOMMENDATIONS 68

5.

I

Co

nclu sions

68

5.2

Recommendations

69

5.2. 1 Custo

mi ze th

e

Database Storage

69 5.2.2 Moni

to!" More Than One Kilowatt-hour Me ter

70 5.2.3

Monitor Power Consumpti on for Singl

e Devi

ce

70 APPE;\fDI X A I\ IS VB 6.0 SOURCE CO DE

71

APPENDIX B BS2 SO URCE CODE 85

REF ERENC ES 86

x

List of Figures

Figure 1. 1.1 Electricity Distributions 2

Figure 2.2.1 ME I zr kilowatt-hour meter 6

Figure 2.2.2 Cancl Prccision kilowatt-hour meter

7

Figure 2.2.3 D28 kilowatt

-hour

J11cter 8

Figure 2.2.4 FraJ11e and brake magnet 9

Figure 2.2.5 Register

10

Figure 2.3.I(a) BS I I I

Fig ure 2.3. 1 (b) BS2

Jl

Fig ure 2.3.2(a) BS I Archi tec ture 1 2

Figure 2.3.2( b) BS2 Archit ec ture !2

Figure 2.3.3 Co nnecti on BS2 pins to serial port !4

Figure 2.4. 1 Synchronous Data Format 15

Figure 2.4.2 Asynchronous Serial Data Frame 16

Figure

2.4.3 RS232 Connectors 18

Figure 2.4.4 RS232 Pin

Configura

tion

19

Figure 2.4.5 USB Symbol 20

Figure 2.4.6 USB Con nectors 2 1

Figure 2.5. 1 Printer Interface to PC Interface 21

Figure 2.6. 1 MsComl11 co ntrol used for seri al progra mmin g 25

Figure 2.6.2 Co nnect ion of Windows TAP] 29

Figure 2.6.3 The TAP! architecture

, shows

that multiple se rvice providers ca n

interact with the

sa

me application 30

Figure 2.64 Voic e-da to modem

supp

ort for TAPl services 33 Figu re 2.6.5 Telephony cards ca n support all levels ofTAPI servi ces 34

Xl

38 Figure 2.7.2 Phototran

sislor appli

cation

figu re 2.7. 1 LOR

39

Fi

gure 2.7.3

Dimension of ph

otod

iode 39

Figure 3. 1.1 Project Block Diagram 40

Figure 3.1.2 The comp onen ts in HPMO 41

Figure 3.2.

1 Se

nso r Tra nsmitter Circuit 42

Figure 3.2

.3 Block diag

ram

of

the sensor input amplifi

er

43

Figure 3.24 A 5Y regulator circuit 44

Figure 3.2.5 Programm ing th

e

BS2 Microcontroll

er

44 Figure 3.2.6

Se

rial pO

l

t

connect

ion for da ta acq uisi

ti

on

45

Figure 3.3

.1

BS prog ramm ing t

e

rminal 46

Figure 3.3.2 Sensor Circuit is conn ected to BS2 I/O Pi n 9 46 Figure 3.3.3 Flow chart for mi

croco

ntroller program 47

Figure 3.3 4 FiowchaI1 ofHP MD program (Part I) 49

Figu

re 3.3.5

Fl

owchart

of HPM

D prog

ram (Part2 - TAP !) 50

Figure 3.3.6 List

of fO

l

m s applied

in

the project 51

Figure 3.3 .7 Main Form 52

Figure 3.3

.8 About for

m 53

Figure 3.3.9 Histo ry Form 54

Figure 4.2.1

LOR input and BS2

I/O pin in put sign al. 60

Figure 4.2.2 The BS2

Output

Data

to

PC 60

Figure 4.3

.

1 Acc umulat

ed data fro

m BS2 microco nt ro ll er output 6 1

Figure 4.3.2 TAPI interfac

e 63

Figure 4.3

.3

Database s torage 65

X LI

Li t of Tables

Tab

le 2.2. 1

MElz

r features

6

Table 2.2.1 0028 Kilowatt-

hour

meter techn

ical specification

10

Table 2.3.1 Co

mpari so n of BS I and BS2

13

Tab

le 2.3.2

Co

nn ection of

BS

pin

and

seria l pOli

13

Tab

le 2.4. 1

Parity Types

17

Table 2.4.2 RS422 Technical Data

19

Tab

le 2.4.3 US B T

echnical Da

ta

20

Table 2.5. 1 Para

ll el

Pin Defi ni tion 22

Table 2.6. 1 Handshaking eve

nts and

desc ripti ons

²⁷

Tab le 3.3. 1 Wa

ve fil e pla

ying me

thod 56

Tab

le 4.2. 1 In

put vo lt

age and

outp

ut

vo

ltage for Regul ator 78M05

59 Tab

le 4.3. I

Some examp

les of

tested crit ical va

lues

62

Table 4.3 .2 TAP

l troubl eshooting

64

Table 4.33

Databa se storage

in Ms Access fo nnat 67

X III

Li t of Listi ngs

Listing

2.6.1 Declarat ions req uired accessing an external TAPl.dl1 funct ion

35

Lis tin g 2.6.2 Code to ca ll a numbe r prov id ed on tbe co mmand lin

e

35 Li

sting 3.3. 1 Increment

and

storing the captured data

55 Listing 3.3.2 Co nve rt the data va ri ab le into

string and store in

da tabase 55 Li

sti ng 3.3.3

Pla

yin

g th e la

st wave

file and drop the call 57

Li

st

ing 4.3.1 Bac k String Adjustment 66

Li

sting 4.3.2

Front Stri ng Adjustment

66

X IV

List of Abbre viations

API

BI

OS

BS

CTI

0028 DSR

ICP

EEPROM

EPP

GU I HPMD ISDN Kbps kWh LED LOR LSB MC

I

Ms MsComm

MWh

PC PSTN RAD

App li

cation

Programm

er Inte

rface Basic Input Output

Sys

tem

Bas ic Stamp

Computer Telephon

y Integra

tion

Single

Phase Elec trom

echanical Kilowatt-h

our meter Data Signal

Ready

Extended

Capabi li

ty Port

Elec trica l Erasab

le

Progra mmab

le Read

Onl y Memory

En

hanced Paral le l Port

Graphi

c User

Interface

House Power Monitoring Devi

ce

Integrated

Serv

i

ce

Digit

al Ne

two rk ki l obytc per second

kilowatt

-hour

Li

ght Emittin g

Diode Lig ht Dependen t Resis

tor

Least Signiti

cant

Bit Med ia Co ntr

ol Interface

Mic

rosoft

Microsoft Comm

Contro

l mega wa tt -hour

Perso nal

computer

Pub

lic Syste

m Telephone Network Rapid

Appli

cation Deve lopment

xv

RTS SESCo SPP

TAP!

UART USB VB 6.0 WOSA

Request to

send

Sarawak Electricity Supply Cooperati on Standard

Parallel Port

Telephony Appli ca tion Programming Interface

Uni ve

rsal Asynchronous Receiver and Transmitter Uni versa l Seria l Bus

Visual Basic 6.0

Window Open Service Architecture

XVI

CHAPTER I

INTRODUCTION

1.1 Project Ilackground

Electri ca l pow er that is generated from steam turbin e or water dam is being ste p up to hi ghe r po wer by transfolln er for tran smiss ion. Upo n reaching the consumer areas, th e power is brough t dow n from the hi gh vol

tage

tran

smissi

on towers to substation transformers. Substation transformers lowe r down the vo ltag e for loca l di stributi on via powe r poles . Th e po wer pole lin e can come all the way to consumer's ho use or be converted to an un derground di stribution sys tem for the fin al distribu tio n to the con su mer's house.

An ot her trans form er ste p s the volt age dow n to the two

240V

c;'·cLlits, plu

s a

neutral wire, to co nsumer 's house. Figure 1.1 .1

shows

the vo lt

age

supplies to co nsum er

Th e power meter or kilo watt-hour meter is much like the wa ter mete r in

.

Iine with th e water suppl y to th e consum er' s house

. Th

e power me ter is in

line with

the power feed hom the neares t transform er and is rea d by the power meler read er. The meter meas ures th e total current pass ing through th e meter and co nverts to power (in kilowatt) in the dur ation of 1 hour. One kil owatt-hou r ( 1 kW h) i s equivalent to the use or 1000 wa tts of e lectr icity (ten 1 00-wat t bul bs) that operates fo r on e hour. One kil ow att-h our is call ed "one

lillit ".

The norm al pra ctice is that the elect ri

city

powe r suppli er (in Sa rawak ca lled

Sa rawak Electric ity Supp ly Cooperati on, SESCo) e mpl oyee will come once a month

to read each kilow at t-hour meter in order to es timate tot al po wer co nsumed by each

house. This task is very troublesome and is prone to error as the worker might miss out some houses, exposed to the attack of danger of residence guard dog for example, or en'or in reading the meter.

Substation

Tlanst~~n"(ler

~.

Distnoution Lilli, ~1

I ,

~ ,.(l

,­

^~

^r-- - /

~ ^llkV

:~-

! / /

, / /

./~

>

I~

^I

TliLILSfolI(cef I'

" .j .I

.-

^{. /} -"," ^'1 .[

/-­

I ^I / ( _'

. / /

Ivletef

/

.I I '

, J

¹¹

//

' I

/ /

/

2401,1

TI,,-ILSfOl1tcef

24011

FIgure I 1.1 Electricity Distributions

1.2 Objectives

The main objective of this project is to design a mechanism that will be able to automatically capture kilowatt-hour meter readout via a personal computer (PC) through the phone line from the central office at any particular instant of time. The reading of the meter are then stored in a PC and the different between two successive

2

meter rea dout for an interv al time can be computed for manipul ati on. Retrieving of th e meter re ading data can also be done through the Pc. With thi s idea , meter reading ta sk wi ll much more simpl er and efficient, where total power used by one parti cul ar rcsidence ca n be known acc urately at any instant of tim e.

The first stage is to develop the student's know ledge and understanding of the chara cteri

stic of

a kilo watt-hour meter, PC int erfac ing, Basic Stamp 2 (BS2) mi crocont roller 's properti es function s and PC programmi ng. The properties of th e

seri

al commu nica ti on will be re vised too .

The

second

stage of th e project

^IS

to build

student skill in

des

ign

ing, deve loping, constructing and impl emen ting the hard ware

-

that is to capture th e meter reading output and store the reading in the PC aut omatica ll y, a nd re tri eve th e data from the PC it self or through a phone call (advance stage) so th at th e captured data can be co mpute for billing or monitoring purposes.

Tec hni ca lly, objectives of this project in order of prefe renc e as di sc ussed and agreed wi th the supervisor, are:

I. To study the function ofkil owatl-h our meter and dete lm ine how its wo rk.

2. To stud y the different types of PC serial communi ca tion.

3. To stud y the va rious kind of programming

so

ft ware th at ca n be used to capture the meter rea dout through the mos t

suitab

le PC serial communi ca ti on method .

4. To man ipulate the captured da ta, comput e the units and costs usage.

3

1.3 Thesis O utline

This document is organized systematically to portray the development stages that concluded the whole project. The repor1 can be divided into two stages. First stage includes the Chapter 1 and 2 and the second stage covers Chapter 3, 4 and 5.

Chapter 1 includes introduction to the project and the objective. In Chapter 2, the focus is more on studies and research that has been carried out on the basic fundamental and characteristic of PC serial interfacing and programming software.

Chapter 2 also covers types of kilowatt-hour meter being used in the market as well as the properties of Basic Stamp (BS) microcontroller.

In Chapter 3, the discussion focuses on the idea of how the hardware and software can be designed. Eve!)' block of the project design is explained thoroughly in the respective sub chapters.

Chapter 4 concentrate 011 the realization of the entire project design (hardware and software) where the testing and troubleshooting is carried out to detect any potential faults in the design. Discussions on modifications and improvement of the design are also included. Procedures involved in the implementation of the hardware and software is explained comprehensively.

Finally, Chapter 5 concludes the achievement of tbe project as a whole. In addition, some recommendations on improvements that can be made to the project in particular are also included.

4

CHAPTER 2

LITERA TURE REVIEW

2. 1 Introduction

General

ly,

thi

s con

tains the definition, the concept

and

so me of the tec hnica l data of each compo nen t and tool s for captur

ing

and processing the data ( in kilowatt per ho ur). It includ

es

types of kilowatt-h

our meters,

the data communication protocols and database app lications.

2.2

Types .,r Ki

lowatt -hour Me ters

There are 3 types of kilowa tt-hour meI er be ing studied in thi s project ME lzr kilowatt-bour meter, Carre l Precision kilowatt-hour meter and

single

phase elec tromechanica l ki lowatt-hour meter (0028)

.

ME I zr and Call'el Precision is digi tal kilowatt-hour meter 0028 is analog kilowatt-hour meter.

2.2.1 MElzr Kilowatt -hour Meter

MElzr kilowatt-hour meter, class 2, wilh digital display, is de;l

..c

ned for sub ­ di

stribution

metering

. ME

l

zr measures acti ve

electrica l power

consun ·~t;on,

on one pbase (single-phase ME). Figure 2.2

.

1 shows

the ME

l

zr.

ME I zr is eq ui pped with a total meter, a yellow metering indicator ligbt (flashing) and with additional functions a ll ow ing:

j.

Remote transfer

to

an impulse counter or a programmable logic con tro ll er 2 Ca bling enor indi

ca

tion

.

5

- i

; - r ^s6sf­

J

Figure 2.2.1 ME I zr kilowatt-hour meter

ME 1 zr aJlow monitoring of the consumption of electrical installation.

J. A range of 8 products for all network types: single-phase, three-phase, three- phase + neutral.

2. Complies with standard fEC 1036 (with sealable enclosure).

3. Compact dimensions:

I. 4 modules of9 mm: lP+N (MEl),

II. 8 modules of 9 mm: 3P and 3P+N (ME3IME4).

2.2.1.1 Features

Table 2.2.1 shows MEl zr features

Frequency

50/60

Hz

Consumption 2.5YA

Capacity 999,99MWh

Display In kWh or megawatt-hour (MWh) with 5 significant digits

insulation voltage 4 kY, 50 Hz

Metering indicator light 1000 flashes per kWh

Table 2.2.1 MElzr features

6