IEC 61000-5-6:2024
(Main)Electromagnetic compatibility (EMC) - Part 5-6: Installation and mitigation guidelines - Mitigation of external EM influences
Electromagnetic compatibility (EMC) - Part 5-6: Installation and mitigation guidelines - Mitigation of external EM influences
IEC 61000-5-6:2024 covers guidelines for the mitigation of external electromagnetic influences impinging upon a facility or installation, aimed at ensuring electromagnetic compatibility (EMC) among electrical and electronic apparatus or systems. These influences include lightning, RF transmitters, power-line and telecom transients, high-altitude electromagnetic pulse (HEMP) and other high-power electromagnetic transients such as those from intentional electromagnetic interference (IEMI). This document is intended for use by installers, manufacturers and users of sensitive electrical or electronic installations or systems. It applies primarily to new installations but, where economically feasible, it can be applied to extensions or modifications to existing facilities. While the technical principles are applicable to individual equipment or apparatus, such application is not included in the scope of this document.
This first edition cancels and replaces the first edition of IEC TR 61000-5-6 published in 2002. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) updating the whole document to include other HPEM environments including IEMI;
b) adding a new Annex A which provides details on the concept of EM resilience and includes information on HPEM detectors, recovery and restoration.
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IEC 61000-5-6 ®
Edition 1.0 2024-04
INTERNATIONAL
STANDARD
Electromagnetic compatibility (EMC) –
Part 5-6: Installation and mitigation guidelines – Mitigation of external EM
influences
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IEC 61000-5-6 ®
Edition 1.0 2024-04
INTERNATIONAL
STANDARD
Electromagnetic compatibility (EMC) –
Part 5-6: Installation and mitigation guidelines – Mitigation of external EM
influences
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100.01 ISBN 978-2-8322-8687-6
– 2 – IEC 61000-5-6:2024 © IEC 2024
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions . 9
3.2 Abbreviated terms . 14
4 Overview and general considerations . 14
4.1 Overview. 14
4.2 General considerations . 15
4.2.1 Elementary interference control . 15
4.2.2 Shields and interfaces . 15
5 Mitigation of radiated and conducted disturbances. 17
5.1 Topological concepts . 17
5.2 Mitigation needs. 18
5.3 The general concept of enclosure . 18
5.4 Interactions at the enclosure boundary. 19
6 Shielding . 19
6.1 General . 19
6.2 Classification of protection zones . 21
6.2.1 General . 21
6.2.2 Zone 1 – Building shield . 22
6.2.3 Zone 2 – Room shield . 22
6.2.4 Zone 3 – Equipment shield . 22
6.2.5 Zone 4 – Apparatus shield . 22
6.3 Design principles for screening . 22
6.3.1 General . 22
6.3.2 Shielding effectiveness . 23
6.3.3 Maintaining shielding effectiveness . 23
6.4 Implementation of screening . 25
6.4.1 General . 25
6.4.2 Sensitive apparatus . 25
6.4.3 Shielding of racks and chassis (zones 4/3 barrier) . 25
6.4.4 Shielding of cabinets (zones 3/2 barrier) . 25
6.4.5 Shielding of rooms (zones 2/1 barrier) . 25
6.4.6 Shielding of buildings (zones 1/0 barrier) . 26
6.4.7 Dealing with apertures . 27
7 Filters . 29
7.1 General . 29
7.2 Fundamental filter characteristics. 30
7.2.1 General . 30
7.2.2 Attenuation and insertion loss . 30
7.2.3 Basic types of filters . 31
7.3 Functional tasks . 32
7.4 Additional filtering concerns . 33
7.4.1 Technical aspects . 33
7.4.2 Economic aspects . 33
7.5 Selection criteria . 34
7.5.1 General . 34
7.5.2 Voltage rating . 34
7.5.3 Current rating . 34
7.5.4 Duty-cycle and overload operating conditions . 34
7.5.5 Operating frequency and range of frequencies to be filtered . 35
7.5.6 Voltage drop and signal loss . 35
7.5.7 Ambient temperature range . 35
7.5.8 Insertion loss and attenuation . 35
7.5.9 Withstand voltage . 36
7.5.10 Attenuation of HF transient disturbances . 36
7.5.11 Leakage current to protective earthing conductor. 36
7.5.12 Permissible reactive current . 37
7.6 Filter installation . 37
7.6.1 General . 37
7.6.2 Installation and mounting techniques . 37
7.6.3 Wiring . 38
7.6.4 Installation of cabinet filters . 38
7.7 Filter testing . 39
7.7.1 General considerations . 39
7.7.2 Insulation to earth and withstand voltage of installed filters . 40
7.7.3 Insertion loss . 40
7.7.4 Attenuation of HF transient disturbances . 40
8 Decoupling devices . 41
8.1 Isolation transformers . 41
8.2 Motor-generator sets . 43
8.3 Engine generators. 43
8.4 Uninterruptible power supply (UPS) . 43
8.5 Optical links . 44
9 Surge-protective devices . 44
9.1 General . 44
9.2 Direct equipment protection . 45
9.3 Installation of multiple SPDs . 46
9.4 Side-effects of uncoordinated cascades . 47
9.5 Typical protective devices . 47
9.5.1 General . 47
9.5.2 Voltage-limiting type SPDs . 47
9.5.3 Voltage-switching type SPDs . 47
Annex A (informative) Resilience-based approach for the mitigation of external high-
power electromagnetic environments . 48
A.1 Overview. 48
A.2 The concept of resilience . 48
A.2.1 General . 48
A.2.2 Discussion on the protection-led approach. 49
A.2.3 Benefits of a resilience-based approach . 50
A.2.4 Affordability and risk . 50
A.2.5 Appropriate application of a resilience-based approach . 51
A.3 EM resilience model and framework . 52
– 4 – IEC 61000-5-6:2024 © IEC 2024
A.3.1 General .
...
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