1、 IEC 61643-311 Edition 2.0 2013-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Components for low-voltage surge protective devices Part 311: Performance requirements and test circuits for gas discharge tubes (GDT) Composants pour parafoudres basse tension Partie 311: Exigences de performance et circ
2、uits dessai pour tubes dcharge de gaz (TDG) IEC 61643-311:2013 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2013 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechani
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16、ec.ch. IEC 61643-311 Edition 2.0 2013-04 INTERNATIONAL STANDARD NORME INTERNATIONALE Components for low-voltage surge protective devices Part 311: Performance requirements and test circuits for gas discharge tubes (GDT) Composants pour parafoudres basse tension Partie 311: Exigences de performance e
17、t circuits dessai pour tubes dcharge de gaz (TDG) INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE U ICS 31.100; 33.040.99 PRICE CODE CODE PRIX ISBN 978-2-83220-678-2 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commissi
18、on Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 61643-311 IEC:2013 CONTENTS FOREWORD . 4 1 Scope . 6 2 Normative references . 6
19、3 Terms, definitions and symbols 7 3.1 Terms and definitions 7 3.2 Symbols 10 4 Service conditions 10 4.1 Low temperature . 10 4.2 Air pressure and altitude . 10 4.3 Ambient temperature . 10 4.4 Relative humidity . 11 5 Mechanical requirements and materials 11 5.1 Robustness of terminations . 11 5.2
20、 Solderability 11 5.3 Radiation . 11 5.4 Marking . 11 6 General 11 6.1 Failure rates 11 6.2 Standard atmospheric conditions . 11 7 Electrical requirements . 12 7.1 General . 12 7.2 Initial values 12 7.2.1 Sparkover voltages 12 7.2.2 Insulation resistance 13 7.2.3 Capacitance 13 7.2.4 Transverse volt
21、age 13 7.2.5 DC holdover 13 7.3 Requirements after application of load. 13 7.3.1 General . 13 7.3.2 Sparkover voltages 14 7.3.3 Insulation resistance 14 7.3.4 AC follow current . 14 7.3.5 Fail-short (Failsafe) . 15 8 Test and measurement procedures and circuits 15 8.1 DC sparkover voltage 15 8.2 Imp
22、ulse sparkover voltage . 16 8.3 Insulation resistance . 16 8.4 Capacitance 16 8.5 Glow-to-arc transition current, glow voltage, arc voltage 16 8.6 Transverse voltage 18 8.7 DC holdover voltage 19 8.7.1 General . 19 8.7.2 DC holdover voltage values . 21 8.8 Requirements for current-carrying capacity
23、 22 8.8.1 General . 22 61643-311 IEC:2013 3 8.8.2 Nominal alternating discharge current 22 8.8.3 Nominal impulse discharge current, waveshape 8/20 . 23 8.8.4 Life test with impulse currents, waveshape 10/1 000 . 24 8.8.5 AC follow current . 24 8.9 Fail-short (failsafe) 25 Bibliography 27 Figure 1 V
24、oltage and current characteristics of a GDT . 8 Figure 2 Symbol for a two-electrode GDT . 10 Figure 3 Symbol for a three-electrode GDT . 10 Figure 4 Circuit for d.c. sparkover voltage test at 100 V/s 15 Figure 5 Circuit for impulse sparkover voltage at 1 000 V/s 16 Figure 6 Test circuit for glow-to-
25、arc transition current, glow voltage and arc voltage . 17 Figure 7 Voltage-current characteristic of a typical GDT, suitable for measuring for example the glow-to-arc transition current, glow voltage, and arc voltage . 18 Figure 8 Test circuit for transverse voltage 19 Figure 9 Test circuit for dc h
26、oldover voltage, two-electrode GDTs 20 Figure 10 Test circuit for dc holdover voltage, three-electrode GDTs . 20 Figure 11 Circuit for nominal alternating discharge current, two-electrode GDTs 23 Figure 12 Circuit for nominal alternating discharge current, three-electrode GDTs . 23 Figure 13 Circuit
27、 for nominal impulse discharge current, two-electrode GDTs 23 Figure 14 Circuit for nominal impulse discharge current, three-electrode GDTs 23 Figure 15 Circuit for life test with impulse current, two-electrode GDTs 24 Figure 16 Circuit for life test with impulse current, three-electrode GDTs . 24 F
28、igure 17 Test circuit for alternating follow current . 25 Figure 18 Test circuit for fail-short (failsafe), two-electrode GDTs 26 Figure 19 Test circuit for fail-short (failsafe), three-electrode GDTs . 26 Table 1 DC and impulse sparkover voltage requirements, initial . 12 Table 2 Values of sparkove
29、r voltages after the tests of Table 5 14 Table 3 Values for different d.c. holdover voltage tests for two-electrode GDTs . 21 Table 4 Values for different d.c. holdover voltage tests for three-electrode GDTs . 21 Table 5 Different classes of current-carrying capacity 22 4 61643-311 IEC:2013 INTERNAT
30、IONAL ELECTROTECHNICAL COMMISSION _ COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES Part 311: Performance requirements and test circuits for gas discharge tubes (GDT) FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all na
31、tional electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Techni
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40、rences cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for
41、 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. This second edition of IEC 61643-311 cancels and replaces the
42、first edition published in 2001. It constitutes a technical revision. Specific changes with respect to the previous edition are: Addition of performance values. 61643-311 IEC:2013 5 The text of this standard is based on the following documents: FDIS Report on voting 37B/113/FDIS 37B/118/RVD Full inf
43、ormation 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 2. A list of all parts of IEC 61643 series, under the general title Components for low-voltage
44、 surge protective devices can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the pub
45、lication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 6 61643-311 IEC:2013 COMPONENTS FOR LOW-VOLTAGE SURGE PROTECTIVE DEVICES Part 311: Performance requirements and test circuits for gas discharge tubes (GDT) 1 Scope This part of IEC 61643 is applicable to gas discharg
46、e tubes (GDT) used for overvoltage protection in telecommunications, signalling and low-voltage power distribution networks with nominal system voltages up to 1 000 V (r.m.s.) a.c. and 1 500 V d.cThey are defined as a gap, or several gaps with two or three metal electrodes hermetically sealed so tha
47、t gas mixture and pressure are under control. They are designed to protect apparatus or personnel, or both, from high transient voltages. This standard contains a series of test criteria, test methods and test circuits for determining the electrical characteristics of GDTs having two or three electr
48、odes. This standard does not specify requirements applicable to complete surge protective devices, nor does it specify total requirements for GDTs employed within electronic devices, where precise coordination between GDT performance and surge protective device withstand capability is highly critica
49、l. This part of IEC 61643 does not deal with mountings and their effect on GDT characteristics. Characteristics given apply solely to GDTs mounted in the ways described for the tests; does not deal with mechanical dimensions; does not deal with quality assurance requirements; may not be sufficient for GDTs used on high-frequency (30 MHz); does not deal with electrostatic voltages; does no
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