EN 60044-7:2000

SLOVENSKI STANDARD
01-junij-2000
Instrument transformers - Part 7: Electronic voltage transformers
Instrument transformers -- Part 7: Electronic voltage transformers
Meßwandler -- Teil 7: Elektronische Spannungswandler
Transformateurs de mesure -- Partie 7: Transformateurs de tension électroniques
Ta slovenski standard je istoveten z: EN 60044-7:2000
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60044-7
NORME EUROPÉENNE
EUROPÄISCHE NORM January 2000

ICS 17.220.20
English version
Instrument transformers
Part 7: Electronic voltage transformers
(IEC 60044-7:1999)
Transformateurs de mesure Meßwandler
Partie 7: Transformateurs de Teil 7: Elektronische Spannungswandler
tension électroniques (IEC 60044-7:1999)
(CEI 60044-7:1999)
This European Standard was approved by CENELEC on 1999-12-01. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and
notified to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
CENELEC
© 2000 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

European Committee for Electrotechnical Standardization
Ref. No. EN 60044-7:2000 E
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.

Page 2
Foreword
The text of document 38/242/FDIS, future edition 1 of IEC 60044-7, prepared by IEC TC 38,
Instrument transformers, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60044-7 on 1999-12-01.

The following dates were fixed:

– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2000-10-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2002-12-01

Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annexes A and ZA are normative and annexes B and C are informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60044-7:1999 was approved by CENELEC as a European
Standard without any modification.
__________
Page 3
Annex ZA (normative)
Normative references to international publications
with their corresponding European publications

This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).

NOTE: When an international publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
Publication Year Title EN/HD Year

1)
IEC 60038 (mod) 1983 HD 472 S1 1989
IEC standard voltages
IEC 60044-2 1997 Instrument transformers EN 60044-2 1999
(mod) Part 2: Inductive voltage transformers

IEC 60050-161 1990 International Electrotechnical  - -
Vocabulary (IEV)
Chapter 161: Electromagnetic compatibility

IEC 60050-321 1986 Chapter 321: Instrument transformers - -

IEC 60050-601 1985 Chapter 601: Generation, transmission and - -
distribution of electricity - General

IEC 60050-604 1987 Chapter 604: Generation, transmission and - -
distribution of electricity - Operation

IEC 60060-1 1989 High-voltage test techniques HD 588.1 S1 1991
+ corr. March 1990 Part 1: General definitions and test
requirements
IEC 60071-1 1993 Insulation co-ordination EN 60071-1 1995
Part 1: Definitions, principles and rules

)
IEC 60186 (mod) 1987 Voltage transformers 1992
HD 554 S1
IEC 60255-5 1977 Electrical relays - -
Part 5: Insulation tests for electrical relays

IEC 60255-6 1988 Part 6: Measuring relays and protection EN 60255-6 1994
(mod) equipment + corr. February 1995

IEC 60255-11 1979 Part 11: Interruptions to and alternating - -
component (ripple) in d.c. auxiliary energizing
quantity of measuring relays
Page 4
) The title of HD 472 S1 is: Nominal voltages for low-voltage public electricity supply systems.
) HD 554 S1 includes A1:1988 to IEC 60186, mod.

Publication Year Title EN/HD Year

IEC 60255-22-1 1988 Part 22: Electrical disturbance tests for - -
measuring relays and protection equipment
Section 1: 1 MHz burst disturbance tests

IEC 60270 1981 Partial discharge measurements - -

IEC 60617-1 1985 Graphical symbols for diagrams - -
Part 1: General information, general index,
Cross-reference tables
IEC 60694 1996 Common specifications for high-voltage EN 60694 1996
switchgear and controlgear standards + corr. May 1999

IEC 60721 series Classification of environmental conditions EN 60721 series
HD 478 series
IEC 60815 1986 Guide for the selection of insulators in respect - -
of polluted conditions
IEC 61000-4-1 1992 Electromagnetic compatibility (EMC) EN 61000-4-1 1994
Part 4: Testing and measurement techniques
Section 1: Overview of immunity tests

IEC 61000-4-2 1995 Part 4-2: Testing and measurement EN 61000-4-2 1995
techniques - Electrostatic discharge immunity
test
IEC 61000-4-3 1995 Part 4-3: Testing and measurement EN 61000-4-3 1996
(mod) techniques - Radiated, radio-frequency,
electromagnetic field immunity test

IEC 61000-4-4 1995 Part 4-4: Testing and measurement EN 61000-4-4 1995
techniques - Electrical fast transient/burst
immunity test
IEC 61000-4-5 1995 Part 4-5: Testing and measurement EN 61000-4-5 1995
techniques - Surge immunity test

IEC 61000-4-8 1993 Part 4-8: Testing and measurement EN 61000-4-8 1993
techniques - Power frequency magnetic field
immunity test
IEC 61000-4-9 1993 Part 4-9: Testing and measurement EN 61000-4-9 1993
techniques - Pulse magnetic field immunity
test
IEC 61000-4-10 1993 Part 4-10: Testing and measurement EN 61000-4-10 1993
techniques - Damped oscillatory magnetic
field immunity test
Page 5
Publication Year Title EN/HD Year

IEC 61000-4-11 1994 Part 4-11: Testing and measurement EN 61000-4-11 1994
techniques - Voltage dips, short interruptions
and voltage variations immunity tests

IEC 61000-4-12 1995 Part 4-12: Testing and measurement EN 61000-4-12 1995
techniques - Oscillatory waves immunity test -
Basic EMC publication
CISPR 11 (mod) 1997 Industrial, scientific and medical (ISM) EN 55011 1998
radio-frequency equipment - Radio
disturbance characteristics - Limits and
methods of measurement
Electromagnetic compatibility - Generic EN 50081-2 1993
emission standard
Part 2: Industrial environment

INTERNATIONAL IEC
STANDARD 60044-7
First edition
1999-12
Instrument transformers –
Part 7:
Electronic voltage transformers

 IEC 1999 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
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For price, see current catalogue

60044-7 © IEC:1999 – 3 –
CONTENTS
Page
FOREWORD . 7
Clause
1 General. 9
1.1 Scope . 9
1.2 Normative references. 9
1.3 General block diagram of electronic voltage transformers . 13
2 Definitions. 15
2.1 General definitions. 15
2.2 Additional definitions for single-phase electronic protective voltage
transformers . 27
2.3 Index of symbols. 27
3 General requirements . 31
3.1 General. 29
3.2 Information to be given for enquiries, tenders and orders. 31
4 Normal and special service conditions . 31
4.1 Normal service conditions . 31
4.2 Special service conditions. 35
4.3 Earthing system . 37
5 Ratings . 37
5.1 Standard values of rated voltages. 37
5.2 Standard values of rated output . 39
5.3 Standard values of rated voltage factor. 39
5.4 Standard values of rated auxiliary power supply voltage . 41
5.5 Standard reference values of other influencing parameters. 41
6 Design requirements . 43
6.1 Insulation requirements for primary voltage sensor . 43
6.2 Insulation requirements for low-voltage components . 51
6.3 Short-circuit withstand capability. 53
6.4 Limits of temperature rise . 53
6.5 Radio interference voltage requirements. 53
6.6 Transmitted overvoltage requirements . 55
6.7 Electromagnetic compatibility requirements . 55
6.8 Reliability. 59
6.9 Abnormal conditions withstand capability . 61
6.10 Abnormal conditions signalling. 61
6.11 Mechanical requirements . 61
6.12 Earthing terminals. 63
7 Classification of tests . 63
7.1 Type tests. 63
7.2 Routine tests . 65
7.3 Special tests . 65

60044-7 © IEC:1999 – 5 –
Clause Page
8 Type tests. 65
8.1 Impulse test on primary voltage terminals . 65
8.2 Wet test for
...