EN 61643-311:2001

SLOVENSKI SIST EN 61643-311:2005

STANDARD
november 2005
Sestavni deli za nizkonapetostne naprave za zaščito pred prenapetostnimi
udari - 311. del: Specifikacije za plinske odvodnike (GDT) (IEC 61643-
311:2001)
Components for low-voltage surge protective devices – Part 311: Specification for
gas discharge tubes (GDT) (IEC 61643-311:2001)
ICS 29.120.50; 29.240.10 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 61643-311
NORME EUROPÉENNE
EUROPÄISCHE NORM December 2001
ICS 31.100;33.040.99
English version
Components for low-voltage surge protective devices
Part 311: Specification for gas discharge tubes (GDT)
(IEC 61643-311:2001)
Composants pour parafoudres basse Bauelemente für
tension Überspannungsschutzgeräte für
Partie 311: Spécifications pour £les tubes Niederspannung
à décharge dans un gaz (TDG) Teil 311: Festlegungen
(CEI 61643-311:2001) für Gasentladungsableiter (ÜsAg)
(IEC 61643-311:2001)
This European Standard was approved by CENELEC on 2001-12-01. 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,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, 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
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61643-311:2001 E
Foreword
The text of document 37B/57/FDIS, future edition 1 of IEC 61643-311, prepared by SC 37B, Specific
components for surge arresters and surge protective devices, of IEC TC 37, Surge arresters, was
submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61643-311 on
2001-12-01.
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) 2002-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2004-12-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61643-311:2001 was approved by CENELEC as a
European Standard with the following editorial modifications:
Throughout the document, replace "a.c." by "AC" and replace "d.c." by "DC".
Delete "µs" in all x/y indications of waveforms:
b)
- 6.1.6 : Table 4 headings (four times) and note ;
- 7.7 : third paragraph (twice) and from "surge generator" in Figures 8 and 9;
- 7.9 : subclause title, in the first paragraph and in the key to Figures 12 and 13;
- 7.10 : subclause title, in the third paragraph and in the key to Figures 14 and 15.
__________
- 3 - EN 61643-311:2001
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 60068-2-1 1990 Environmental testing EN 60068-2-1 1993
Part 2: Tests - Tests A: Cold
1)
IEC 60068-2-20 1979 Part 2: Tests - Test T: Soldering HD 323.2.20 S3 1988
IEC 60068-2-21 1999 Part 2-21: Tests - Test U: Robustness of EN 60068-2-21 1999
terminations and integral mounting
devices
IEC 61000-4-5 1995 Electromagnetic compatibility (EMC) EN 61000-4-5 1995
Part 4-5: Testing and measurement
techniques - Surge immunity test
IEC 61180-1 1992 High-voltage test techniques for low- EN 61180-1 1994
voltage equipment
Part 1: Definitions, test and procedure
requirements
ITU-T 2000 Resistibility of telecommunication--
Recommendation equipment installed in a
K.20 telecommunications centre to
overvoltages and overcurrents

1)
HD 323.2.20 S3 includes A2:1987 to IEC 60068-2-20.

NORME CEI
INTERNATIONALE IEC
61643-311
INTERNATIONAL
Première édition
STANDARD
First edition
2001-10
Composants pour parafoudres basse tension –
Partie 311:
Spécifications pour les tubes à décharge
dans un gaz (TDG)
Components for low-voltage surge
protective devices –
Part 311:
Specification for gas discharge tubes (GDT)
© IEC 2001 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
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE S
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

61643-311 © IEC:2001 – 3 –
CONTENTS
FOREWORD.5
1 Scope.7
2 Normative references.7
3 Definitions and symbols .9
3.1 Definitions .9
3.2 Symbols .13
4 Service conditions.13
4.1 Robustness of terminations.13
4.2 Solderability.13
4.3 Low temperature.13
4.4 Storage conditions.13
4.5 Operating conditions.13
4.6 Radiation.15
5 Marking .15
6 Electrical requirements .15
6.1 Initial values .15
6.1.1 Sparkover voltages .15
6.1.2 Insulation resistance .17
6.1.3 Capacitance.17
6.1.4 Transverse voltage .17
6.1.5 DC holdover voltage.19
6.1.6 Requirements for current-carrying capacity .21
6.1.7 Requirements after application of load .21
6.1.8 Sparkover voltage.23
6.1.9 Insulation resistance .23
6.1.10 Failure rates .23
7 Test methods and circuits .23
7.1 DC sparkover voltage .25
7.2 Impulse sparkover voltage .25
7.3 Insulation resistance.27
7.4 Capacitance .27
7.5 Glow-to-arc transition current, glow voltage, arc voltage.27
7.6 Transverse voltage .31
7.7 DC holdover voltage .31
7.8 Circuits and methods for testing the nominal alternating discharge current .35
7.9 Circuit and methods for testing the nominal impulse discharge current,
waveshape 8/20 µs.35
7.10 Circuits and methods for testing the life test with impulse currents,
waveshape 10/1 000 µs .37
Bibliography .41

61643-311 © IEC:2001 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
Part 311: Specification for gas discharge tubes (GDT)
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 61643-311 has been prepared by subcommittee 37B: Specific
components for surge arresters and surge protective devices, of IEC technical committee 37:
Surge arresters.
The text of this standard is based on the following documents:
FDIS Report on voting
37B/57/FDIS 37B/60/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.
The committee has decided that the contents of this publication will remain unchanged until
June 2003. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61643-311 © IEC:2001 – 7 –
COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES –
Part 311: Specification for gas discharge tubes (GDT)
1 Scope
...