EN 60052:2002

Voltage measurement by means of standard air gaps

Applies to the construction and use of sphere-gaps for measuring the peak value of alternating, direct and both full standard and longer tail impulse voltages. Peak values of the disruptive voltages in air are given in tabular form. Note: - For high-voltage test techniques, see EN 60.

Spannungsmessungen mit Standard-Luftfunkenstrecken

Mesure de tension au moyen des éclateurs à sphères normalisés

Concerne la construction et l'utilisation d'éclateurs à sphères pour la mesure des valeurs de crête des tensions alternatives, des tensions continues et des tensions de choc pleines normales ainsi que des tensions de choc de plus grande durée de queue. Les valeurs de crête des tensions disruptives dans l'air sont données sous forme de tableaux. Note: - Pour les techniques des essais à haute tension voir la EN 60.

Voltage measurement by means of standard air gaps (IEC 60052:2002)

General Information

• Status: Published
• Publication Date: 07-Nov-2002
• Withdrawal Date: 31-Oct-2005
• ICS: 19.080 - Electrical and electronic testing
• Technical Committee: CLC/SR 42 - High-voltage testing techniques
• Drafting Committee: IEC/TC 42 - IEC_TC_42
• Parallel Committee: IEC/TC 42 - IEC_TC_42
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 08-Nov-2002
• Completion Date: 08-Nov-2002
• Ref Project: SIST EN 60052:2004 - Voltage measurement by means of standard air gaps

Standards Content (Sample)

SLOVENSKI SIST EN 60052:2004
STANDARD
april 2004
Voltage measurement by means of standard air gaps (IEC 60052:2002)
ICS 19.080 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60052
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2002

ICS 19.080
English version
Voltage measurement by means of standard air gaps
(IEC 60052:2002)
Mesure de tension au moyen  Spannungsmessungen mit
des éclateurs à sphères normalisés Standard-Luftfunkenstrecken
(CEI 60052:2002) (IEC 60052:2002)

This European Standard was approved by CENELEC on 2002-11-01. 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,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta,
Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60052:2002 E
Foreword
The text of document 42/173/FDIS, future edition 3 of IEC 60052, prepared by IEC TC 42, High-voltage
testing techniques, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC
as EN 60052 on 2002-11-01.
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) 2003-08-01

– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-11-01

Annexes designated "normative" are part of the body of the standard.
Annexes designated "informative" are given for information only.
In this standard, annex ZA is normative and annex A to D are informative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60052:2002 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60052:2002
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
IEC 60060-1 1989 High-voltage test techniques
+ corr. March 1990 Part 1: General definitions and test HD 588.1 S1 1991
requirements
IEC 60060-2 1994 Part 2: Measuring systems EN 60060-2 1994
A11 1998
NORME CEI
INTERNATIONALE IEC
INTERNATIONAL
Troisième édition
STANDARD
Third edition
2002-10
Mesure de tension au moyen des éclateurs
à sphères normalisés
Voltage measurement by means of
standard air gaps
© IEC 2002 Droits de reproduction réservés ⎯ Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
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U
Commission Electrotechnique Internationale PRICE CODE
International Electrotechnical Commission
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Pour prix, voir catalogue en vigueur
For price, see current catalogue

60052 © IEC:2002 – 3 –
CONTENTS
FOREWORD . 5
INTRODUCTION .7
1 Scope . 9
2 Normative references. 9
3 Definitions. 9
4 Standard sphere-gap. 9
4.1 Requirements on shape and surface conditions. 9
4.2 General arrangement of a sphere-gap for measurement.11
4.3 Connections.13
5 Use of the sphere-gap.15
5.1 Condition of the sphere surfaces .17
5.2 Irradiation .17
5.3 Voltage measurements .17
6 Reference values in tables 2 and 3.19
6.1 Accuracy of values in tables 2 and 3.21
6.2 Air density correction factor.21
6.3 Humidity correction factor .23
7 Standard rod-rod gap for measurement of direct voltage.23
7.1 General arrangement of a rod-rod gap .23
7.2 Reference values .23
7.3 Measurement procedure .23
8 Use of standard air gaps for performance checks of approved measuring systems .25
Annex A (informative) Range of experimental calibrations for sphere-gaps.45
Annex B (informative) Procedure by which the values in tables 2 and 3 have been
derived from national standards and other sources .47
Annex C (informative) Sources of irradiation .49
Annex D (informative) Uncertainty and calibration of sphere-gaps .51
Bibliography .53
Figure 1 – Vertical sphere-gap.39
Figure 2 – Horizontal sphere-gap.41
Figure 3 – Arrangement for rod-rod gap .43
Table 1 – Clearance limits .13
Table 2 – Peak values of disruptive discharge voltages (U values in impulse tests) in
kV for alternating voltages at power frequencies, full lightning and switching impulse
voltages of negative polarity and direct voltages of both polarities .27
Table 3 – Peak values of disruptive discharge voltages (U values in impulse tests)
in kV for full lightning and switching impulse voltages of positive polarity.33
Table A.1 – Experimental calibrations of the sphere-gap .45
Table B.1 – Rounding off of values in tables 2 and 3.47

60052 © IEC:2002 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
VOLTAGE MEASUREMENT
BY MEANS OF STANDARD AIR GAPS
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60052 has been prepared by IEC technical committee 42: High-
voltage testing techniques.
This third edition of IEC 60052 cancels and replaces the second edition, published in 1960, and
constitutes a technical revision.
The text of this standard is based on the following documents:
FDIS Report on voting
42/173/FDIS 42/175/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
Annexes A, B, C and D are for information only.
The committee has decided that the contents of this publication will remain unchanged until
2012. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
60052 © IEC:2002 – 7 –
INTRODUCTION
Sphere-gaps have been used as a simple and reliable method for measurement of peak
voltage in many industrial test facilities for 75 years, and the values of tables I and II in the
second edition of IEC 60052 have been accepted as an International Consensus Standard of
Measurements. These tables appear in this standard as tables 2 and 3.
There is no information in the references (e.g. annex A) with regard to traceability to national
standards of measurement. However, the dispersion in the measured values of sparkover
voltages upon which tables 2 and 3 are based, does not exceed 3 % for a 95 % confidence
level.
In view of the long history of IEC 60052 as an International Consensus Standard of
Measurement, the values for disruptive discharge voltage in tables I and II of the second
edition of IEC 60052 are reproduced in this publication as tables 2 and 3. They are to be used
as mean values with an uncertainty of 3 % for a 95 % confidence level.
The material on rod-rod gaps for reliable measurement of high direct voltages has been
included here to form an integrated standard on high voltage measurements using standard
air gaps.
Four informative annexes are included:
Annex A gives the limits of voltage and frequency over which tables 2 and 3 have been derived
from experiments and can be presumed to be accurate within the limits specified in 4.1.
Annex B gives the procedure by which the values in tables 2 and 3 have been derived from
previous national standards and other sources.
Annex C provides information on additional irradiation, which may be needed in certain
situations.
Annex D provides information on the u
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