1、 IEC 62848-1 Edition 1.0 2016-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Railway applications DC surge arresters and voltage limiting devices Part 1: Metal-oxide surge arresters without gaps Applications ferroviaires Parafoudres et appareils limiteurs de tension pour rseaux courant continu Parti
2、e 1: Parafoudres oxyde mtallique sans clateur IEC 62848-1:2016-06(en-fr) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2016 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
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19、rvice Clients - webstore.iec.ch/csc Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 62848-1 Edition 1.0 2016-06 INTERNATIONAL STANDARD NORME INTERNATIONALE Railway applications DC surge arresters and voltage limiting devi
20、ces Part 1: Metal-oxide surge arresters without gaps Applications ferroviaires Parafoudres et appareils limiteurs de tension pour rseaux courant continu Partie 1: Parafoudres oxyde mtallique sans clateur INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 45.060
21、ISBN 978-2-8322-3452-5 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette
22、 publication via un distributeur agr. 2 IEC 62848-1:2016 IEC 2016 CONTENTS FOREWORD . 5 1 Scope 7 2 Normative references. 7 3 Terms and definitions 8 4 Characteristics 14 4.1 Marking . 14 4.2 Service conditions . 14 4.2.1 Normal service conditions 14 4.2.2 Abnormal service conditions . 15 4.3 Requir
23、ements 15 4.3.1 Insulation withstand of the arrester housing 15 4.3.2 Reference voltage 15 4.3.3 Residual voltages . 16 4.3.4 Internal partial discharges 16 4.3.5 Seal leakage 16 4.3.6 Current distribution in a multi-column arrester . 16 4.3.7 Charge transfer 16 4.3.8 Operating duty . 16 4.3.9 Short
24、 circuit behaviour . 16 4.3.10 Protective characteristics of the arresters . 16 5 Arrester classification 16 6 Type test . 17 6.1 General . 17 6.2 Insulation withstand tests on the arrester housing 18 6.2.1 General . 18 6.2.2 Ambient air conditions during tests . 19 6.2.3 Wet test procedure . 19 6.2
25、.4 Lightning impulse voltage test 19 6.2.5 DC voltage withstand test . 19 6.3 Residual voltage tests . 19 6.3.1 General . 19 6.3.2 Steep current impulse residual voltage test . 20 6.3.3 Lightning impulse residual voltage test . 20 6.3.4 Switching impulse residual voltage test . 20 6.4 Charge transfe
26、r test 21 6.4.1 General . 21 6.4.2 Charge transfer test requirements 21 6.5 Operating duty tests 22 6.5.1 General . 22 6.5.2 Accelerated ageing procedure 23 6.5.3 Operating duty test . 25 6.6 Short-circuit tests 27 6.6.1 General . 27 6.6.2 Preparation of the test samples 28 6.6.3 Testing of porcelai
27、n housed arresters . 29 6.6.4 Testing of polymer housed arresters . 31 IEC 62848-1:2016 IEC 2016 3 6.6.5 Evaluation of test results 33 6.7 Internal partial discharge tests . 34 6.8 Bending moment test . 34 6.8.1 General . 34 6.8.2 Test on porcelain and cast-resin housed arresters 34 6.8.3 Test on po
28、lymer-housed arresters with and without enclosed gas volume . 35 6.8.4 Definition of mechanical loads 38 6.9 Seal leak rate test . 39 6.9.1 General . 39 6.9.2 Definition of seal leak rate 39 6.9.3 Sample preparation 40 6.9.4 Test procedure . 40 6.9.5 Test evaluation 40 6.10 Environmental tests . 40
29、6.10.1 Weather ageing test for polymer-housed surge arresters . 40 6.10.2 Accelerated weathering test for polymer housed surge arresters and cast resin housed surge arresters . 41 6.10.3 Temperature cycling test and salt mist test for porcelain and cast resin- housed arresters 42 6.11 Shock and vibr
30、ation test 43 7 Routine tests and acceptance tests 43 7.1 Routine tests . 43 7.2 Acceptance tests . 43 Annex A (normative) Flowchart of testing procedure of bending moment . 44 Annex B (informative) Direct lightning current impulse withstand test 45 Bibliography . 47 Figure 1 Impulse current Rectang
31、ular 22 Figure 2 Power losses of the metal-oxide resistor at elevated temperatures versus time 24 Figure 3 Short-circuit test setup for porcelain-housed arresters (all leads and venting systems in the same plane) . 29 Figure 4 Short circuit test setup for polymer housed arresters (all leads and vent
32、ing systems in the same plane) . 32 Figure 5 Example of a test circuit for re-applying pre-failing immediately before applying the short-circuit test current . 33 Figure 6 Thermomechanical preconditioning . 36 Figure 7 Example of the arrangement for the thermo-mechanical preconditioning and directio
33、ns of the cantilever load . 37 Figure 8 Water immersion test 38 Figure 9 Definition of mechanical loads (base load = SSL) 39 Figure 10 Surge arrester unit 39 Figure A.1 Flowchart of testing procedure of bending moment 44 Table 1 Arrester classification 17 Table 2 Nominal discharge current . 17 Table
34、 3 Type tests . 18 Table 4 Peak currents for switching impulse residual voltage test 21 4 IEC 62848-1:2016 IEC 2016 Table 5 Parameters for the charge transfer test 21 Table 6 Determination of elevated continuous operating voltage . 25 Table 7 Test procedure of operating duty test . 25 Table 8 Values
35、 for high current impulses 26 Table 9 Required currents for short-circuit tests of porcelain housed arresters 30 Table 10 Required currents for short-circuit tests 32 Table B.1 Parameters for the direct lightning impulse . 45 IEC 62848-1:2016 IEC 2016 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ RA
36、ILWAY APPLICATIONS DC SURGE ARRESTERS AND VOLTAGE LIMITING DEVICES Part 1: Metal-oxide surge arresters without gaps FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Commit
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47、al Standard IEC 62848-1 has been prepared by IEC technical committee 9: Electrical equipment and systems for railways. This International Standard is based on EN 50526-1:2012, the main technical changes with regard to EN 50526-1:2012 are as follows: a) According to Resolution 52/33, taken by IEC tec
48、hnical committee 9, this international standard should apply to both fixed installations and rolling stock, therefore the title is replaced with “Railway applications DC surge arresters and voltage limiting devices Part 1: Metal-oxide surge arresters without gaps”, and the scope of IEC 62848-1 is mo
49、dified so that the standard can be used in both cases. b) As rolling stocks are supplied with many voltages as stated in IEC 60850, the surge arrester will limit voltage surge on DC systems specified in IEC 60850 with nominal voltage up to 3 kV. c) The European standards, listed in the original EN 50526-1:2012, are replaced with international standards, if they have corresponding internat
