IEC 61000-4-23-2016 Electromagnetic compatibility (EMC) - Part 4-23 Testing and measurement techniques - Test methods for protective devices for HEMP and other .pdf
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1、 IEC 61000-4-23 Edition 2.0 2016-10 INTERNATIONAL STANDARD Electromagnetic compatibility (EMC) Part 4-23: Testing and measurement techniques Test methods for protective devices for HEMP and other radiated disturbances IEC 61000-4-23:2016-10(en) BASIC EMC PUBLICATION colour inside THIS PUBLICATION IS
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8、w publications released. Available online and also once a month by email. Electropedia - www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French, with equivalent terms in 15 additional languages. Also
9、known as the International Electrotechnical Vocabulary (IEV) online. IEC Glossary - std.iec.ch/glossary 65 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002. Some entries have been collected from earli
10、er publications of IEC TC 37, 77, 86 and CISPR. IEC Customer Service Centre - webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 61000-4-23 Edition 2.0 2016-10 INTERNATIONAL STANDARD Elec
11、tromagnetic compatibility (EMC) Part 4-23: Testing and measurement techniques Test methods for protective devices for HEMP and other radiated disturbances INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.100.99 ISBN 978-2-8322-3687-1 BASIC EMC PUBLICATION Registered trademark of the International El
12、ectrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. colour inside 2 IEC 61000-4-23:2016 IEC 2016 CONTENTS FOREWORD . 6 INTRODUCTION . 8 1 Scope 9 2 Normative references 9 3 Terms and definitions 10 4 HEMP test concepts 15 4.1 General . 15 4
13、.2 Testing of shielding enclosures . 16 4.2.1 General . 16 4.2.2 Buildings . 19 4.2.3 Shelters and shielded rooms 20 4.2.4 Cabinets, racks and boxes . 21 4.3 Testing of shielded cables and connectors 23 4.3.1 General . 23 4.3.2 Testing of cable shields . 23 4.3.3 Testing of cable connectors . 26 4.4
14、 Testing of shielding materials 27 4.4.1 General . 27 4.4.2 Conducting gaskets . 27 4.4.3 Conducting sheets and screens . 29 4.4.4 Cut-off waveguides and honeycombs . 32 4.5 Summary of test concepts . 33 5 Test methods for measuring the shielding effectiveness of HEMP protection facilities . 34 5.1
15、General . 34 5.2 Electromagnetic field testing . 34 5.2.1 General . 34 5.2.2 Pulse field testing 34 5.2.3 CW field testing . 40 5.3 Current injection test procedures 55 5.3.1 General . 55 5.3.2 Injection testing of enclosures . 55 5.3.3 Transfer impedance and admittance of cable shields and connecto
16、rs 57 5.3.4 Testing of gasket material 57 Annex A (informative) HEMP test concepts for electrical systems 60 A.1 Overview. 60 A.2 Types of HEMP tests 60 A.2.1 General . 60 A.2.2 System-level transient tests . 60 A.2.3 CW field illumination tests . 61 A.2.4 Current injection testing . 61 A.2.5 Partia
17、l illumination testing 62 A.2.6 Subsystem and component testing 62 A.3 Definition of the testing interface . 63 A.4 Use of test data 65 A.4.1 General . 65 IEC 61000-4-23:2016 IEC 2016 3 A.4.2 Acceptance of new systems . 65 A.4.3 System assessments . 65 A.4.4 Hardness surveillance monitoring 65 A.4.5
18、 System design . 65 A.5 Testing uncertainties . 66 Annex B (informative) Characterization of shielded cables . 67 B.1 Fundamentals of cable shielding . 67 B.2 Definitions of transfer impedance and transfer admittance 68 B.3 Relative significance of Z tand Y t. 71 Annex C (informative) Equipment for
19、HEMP pulse measurements 72 C.1 General . 72 C.2 Sensors for HEMP measurements . 72 C.2.1 B- and H-field sensors . 72 C.2.2 D- and E-field sensors . 74 C.2.3 Current sensors . 76 C.3 Signal transmission . 77 C.3.1 General . 77 C.3.2 Fibre optic links . 77 C.3.3 Fibre optic transducers 78 C.4 Signal d
20、etection and processing . 78 Annex D (informative) Equipment for CW testing . 80 D.1 General . 80 D.2 Antenna system 80 D.3 Power amplifier . 82 D.4 Receiver (network analyser) 83 D.5 Reference and response sensors 83 D.6 Fibre optic system . 85 D.7 Limitations of measurements 88 Annex E (informativ
21、e) Characterization of a planar shield for HEMP protection 89 E.1 General . 89 E.2 Problem geometry . 90 E.3 Equivalent circuit representation . 91 E.3.1 General . 91 E.3.2 Chain parameter representation of the shield . 92 E.3.3 Circuit responses . 93 Annex F (informative) Inside-to-out measurement
22、method . 97 F.1 Purpose 97 F.2 Comparison of existing SE test methods . 97 F.3 Inside-to-out SE test of shielded rooms . 98 F.3.1 Measurements of the inside-to-out SE . 98 F.3.2 Summary . 101 Bibliography 102 Figure 1 Example of measured magnitude and phase of the transfer function T( ) = H in /H ou
23、tfor a shielded enclosure 17 Figure 2 Electric field and magnetic field shielding effectiveness of a 0,5 mm thick aluminum enclosure 29 . 18 Figure 3 Measured magnetic field shielding effectiveness SE Hfor a building 19 4 IEC 61000-4-23:2016 IEC 2016 Figure 4 Conceptual illustration of the HEMP test
24、 of a building 19 Figure 5 Illustration of a shielded room or enclosure excited by HEMP fields . 21 Figure 6 Illustration of equipment racks, cabinets and box excited by internal HEMP disturbance . 21 Figure 7 A general shield excited by current injection 22 Figure 8 Basic configuration for transfer
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