This part of IEC 61000 provides guidelines to protect commercial facilities from the highpower electromagnetic disturbances of high-altitude electromagnetic pulse (HEMP) and intentional electromagnetic interference (IEMI). These guidelines are developed from the entire body of IEC SC 77C publications.<\/p>\n
This document is applicable to both existing facilities and new buildings when the customer has decided that protection of critical electronics from HEMP and IEMI is important to the function of the facility.<\/p>\n
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | INTRODUCTION <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 3.2 Abbreviated terms 4 General <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 5 Development of the environment levels 5.1 General 5.2 High-altitude electromagnetic pulse (HEMP) <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 5.3 Intentional electromagnetic interference (IEMI) 5.4 Comparison of the HEMP and IEMI radiated fields <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 6 Protection and testing approach for new facilities 6.1 General Figures Figure 1 \u2013 Comparison of IEMI radiated environments with those of E1 HEMP and lightning <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6.2 HEMP protection for new facilities 6.2.1 General 6.2.2 Electromagnetic shield Figure 2 \u2013 Basic high frequency shielding approach for a building <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | Tables Table 1 \u2013 Radiated and conducted environments for early time HEMP and concepts 1 to 6 (IEC 61000-6-6) <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 6.3 IEMI protection for new facilities <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 6.4 HEMP and IEMI protection for new facilities 7 Protection and testing approach for existing facilities 7.1 General 7.2 HEMP protection for existing facilities <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 7.3 IEMI protection for existing facilities <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 7.4 HEMP and IEMI protection for existing facilities <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 8 Method to develop other shield-level examples 9 Hardness maintenance 9.1 General 9.2 General annual maintenance 9.3 PoE filter and MOV maintenance <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Annex A (informative) IEC SC 77C publications A.1 General Figure A.1 \u2013 Organization of the current publications of IEC SC 77C <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | A.2 IEC TR 61000-1-3: General \u2013 The effects of high-altitude EMP (HEMP) on civil equipment and systems A.3 IEC TR 61000-1-5: General \u2013 High power electromagnetic (HPEM) effects on civil systems <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Figure A.2 \u2013 Topological diagram for the simple system <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | A.4 IEC 61000-2: Environment \u2013 Section 9: Description of HEMP environment \u2013 Radiated disturbance Figure A.3 \u2013 Illustration of typical HPEM inadvertent penetration protection methods <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | A.5 IEC 61000-2-10: Environment \u2013 Description of HEMP environment \u2013 Conducted disturbance Figure A.4 \u2013 Complete standard HEMP time waveform with the dashed line indicating a negative value of the E3 HEMP waveform Figure A.5 \u2013 Amplitude spectrum of each HEMP component <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Table A.1 \u2013 Early time HEMP conducted common-mode short-circuit current including the time history and peak value Ipk as a function of severity level, length L in m and ground conductivity in S\/m <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Figure A.6 \u2013 Simple equivalent circuit where E0 is the induced late time HEMP electric field Table A.2 \u2013 Intermediate time HEMP conducted common-mode short-circuit currents including the time history and peak value Ipk as a function of length L in m and ground conductivity in S\/m <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Table A.3 \u2013 E1 HEMP response levels for IL for the loaded vertical monopole antennaa (current values are in kA) <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | A.6 IEC 61000-2-11: Environment \u2013 Classification of HEMP environments Table A.4 \u2013 E1 HEMP response levels for IL for the loaded horizontal dipole antenna a (current values are in kA) <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | A.7 IEC 61000-2-13: Environment \u2013 High-power electromagnetic (HPEM) environments \u2013 Radiated and conducted Table A.5 \u2013 Minimum required attenuation of peak time domain external environments for the six principal protection concepts for E1 HEMP <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Figure A.7 \u2013 Several types of HPEM environments compared with the IEC E1 HEMP waveform Table A.6 \u2013 Definitions for IEMI bandwidth classification <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | A.8 IEC 61000-4-23: Testing and measurement techniques \u2013 Test methods for protective devices for HEMP and other radiated disturbances <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | Figure A.8 \u2013 Typical configuration of a CW test facility Figure A.9 \u2013 Example scan from 9 kHz to 3 GHz for the ambient electromagnetic field from communication signals <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Figure A.10 \u2013 Measurement methods for evaluating shielding effectiveness of high-level shields <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | A.9 IEC 61000-4-24: Testing and measurement techniques \u2013 Test methods for protective devices for HEMP conducted disturbance Table A.7 \u2013 Overview of conducted early time HEMP test requirements defined in other specifications <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | A.10 IEC 61000-4-25: Testing and measurement techniques \u2013 HEMP immunity test methods for equipment and systems Table A.8 \u2013 Performance criteria of a filter against early time HEMP at the AC power port with a nominal load of 2 \u2126 <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | A.11 IEC TR 61000-4-32: Testing and measurement techniques \u2013 High-altitude electromagnetic pulse (HEMP) simulator compendium A.12 IEC 61000-4-33: Testing and measurement techniques \u2013 Measurement methods for high-power transient parameters <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | A.13 IEC TR 61000-4-35: Testing and measurement techniques \u2013 HPEM simulator compendium A.14 IEC 61000-4-36: Testing and measurement techniques \u2013 IEMI immunity test methods for equipment and systems <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | A.15 IEC TR 61000-5-3: Installation and mitigation guidelines \u2013 HEMP protection concepts Figure A.11 \u2013 Representation of typical IEMI radiation and coupling onto systems <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | A.16 IEC TR 61000-5: Installation and mitigation guidelines \u2013 Section 4: Specifications for protective devices against HEMP radiated disturbance Figure A.12 \u2013 Example of penetration from radiated and conducted disturbances through a two-barrier protection <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | A.17 IEC 61000-5: Installation and mitigation guidelines \u2013 Section 5: Specification of protective devices for HEMP conducted disturbance A.18 IEC TR 61000-5-6: Installation and mitigation guidelines \u2013 Mitigation of external EM influences <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Figure A.13 \u2013 Generalised system topology <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | A.19 IEC 61000-5-7: Installation and mitigation guidelines \u2013 Degrees of protection provided by enclosures against electromagnetic disturbances (EM code) <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | A.20 IEC TS 61000-5-8: Installation and mitigation guidelines \u2013 HEMP protection methods for the distributed infrastructure A.21 IEC TS 61000-5-9: Installation and mitigation guidelines \u2013 System-level susceptibility assessments for HEMP and HPEM <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | Figure A.14 \u2013 Assessment methodology flowchart <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | A.22 IEC 61000-6-6: Generic standards \u2013 HEMP immunity for indoor equipment <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | Table A.9 \u2013 Radiated and conducted environments for early time HEMP and concepts 1 to 6 <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Electromagnetic compatibility (EMC) – Installation and mitigation guidelines. Guidance on the protection of facilities against HEMP and IEMI<\/b><\/p>\n |