IEC/TR 61000-5-3

Electromagnetic compatibility (EMC) - Part 5-3: Installation and mitigation guidelines - HEMP protection concepts

This technical report provides elements for:[
]- the design of an adequate protection for civil facilities against the electromagnetic pulse due to a high altitude nuclear explosion, denoted in what follows by HEMP;[
]- the evaluation of already existing protections with respect to stresses imposed by HEMP;[
]- to compare the requirements of HEMP and lightning protection in order to show if they can be combined at low cost;[
]- to emphasise the differences between the requirements of HEMP and lightning protections in order to permit the evaluation of the consequences of HEMP when no additional measures are taken except existing lightning protection.

Compatibilité électromagnétique (CEM) - Partie 5-3: Guides d'installation et d'atténuation - Concepts de protection IEMN-HA

Ce rapport technique fournit des éléments permettant:[
]- de mettre au point un système de protection adéquat des bâtiments publics contre les impulsions électromagnétiques dues aux explosions nucléaires à haute altitude et designées ci-après par IEMN-HA;[
]- d'évaluer les systèmes de protection existants en tenant compte des contraintes imposées par l'IEMN-HA;[
]- de comparer les spécifications de protection contre la foudre et contre l'IEMN-HA pour déterminer si elles peuvent être combinées à faible coût;[
]- de souligner les différences entre les spécifications de protection contre l'IEMN-HA et les spécifications de protection contre la foudre pour permettre d'évaluer les conséquences de l'IEMN-HA quand aucune mesure de protection supplémentaire n'est prise, hormis celles concernant la foudre.

Electromagnetic compatibility (EMC) - Part 5-3: Installation and mitigation guidelines - HEMP protection concepts

General Information

• Status: Not Published
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: SC 77C - High power transient phenomena
• Current Stage: PPUB - Publication issued
• Start Date: 09-Jul-1999
• Ref Project: SIST-TP IEC/TR 61000-5-3:2004 - Electromagnetic compatibility (EMC) - Part 5-3: Installation and mitigation guidelines - HEMP protection concepts

Standards Content (Sample)

SLOVENSKI SIST-TP IEC/TR 61000-5-3:2004

STANDARD
april 2004
Electromagnetic compatibility (EMC) - Part 5-3: Installation and mitigation
guidelines - HEMP protection concepts
ICS 33.100.01 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

RAPPORT CEI
TECHNIQUE IEC
TR 61000-5-3
TECHNICAL
Première édition
REPORT
First edition
1999-07
PUBLICATION FONDAMENTALE EN CEM
BASIC EMC PUBLICATION
Compatibilité électromagnétique (CEM) –
Partie 5-3:
Guides d'installation et d'atténuation –
Concepts de protection IEMN-HA
Electromagnetic compatibility (EMC) –
Part 5-3:
Installation and mitigation guidelines –
HEMP protection concepts
 IEC 1999 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
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microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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Pour prix, voir catalogue en vigueur
For price, see current catalogue

TR 61000-5-3 © IEC:1999 – 3 –
CONTENTS
Page
FOREWORD . 7
INTRODUCTION .9
Clause
1 Scope . 11
2 Reference documents . 11
3 Definitions. 13
4 General. 13
5 Protection principles. 15
5.1 General. 15
5.2 Zoning . 15
5.3 Protection against radiated disturbance . 17
5.4 Protection against conducted disturbance. 17
5.5 Wiring and installation guidelines . 19
5.5.1 Points of entry. 19
5.5.2 Wiring concepts . 19
5.5.3 Cables . 21
5.6 Relation between HEMP and lightning protection principles . 21
5.6.1 HEMP and lightning sources. 23
5.6.2 HEMP and lightning protections . 23
5.6.3 Discussion on the two types of environment. 25
6 Component selection. 27
6.1 Selection of circuit components . 27
6.2 Selection of protective devices against radiated disturbance . 29
6.3 Selection of protective devices against conducted disturbance. 29
6.3.1 General. 29
6.3.2 Device categories. 29
6.3.3 Protection of typical line interfaces . 37
7 Protection concepts. 43
7.1 General considerations . 43
7.2 Topological considerations . 43
7.3 Definition of protection concepts. 45
7.3.1 Building protection concepts . 45
7.3.2 Protection concepts for shielded enclosures . 47
8 Comparison of protection measures against conducted disturbances due to HEMP and
lightning electromagnetic pulse (LEMP) . 49
8.1 General. 49
8.2 Peak current î . 49
8.3 Maximum di/dt . 51
8.4 Maximum du/dt . 51
8.5 Integral i × dt. 51
8.6 Integral i × dt. 51
8.7 Time to half-value . 53
8.8 Conclusions on the comparisons between HEMP and LEMP protection. 53

TR 61000-5-3 © IEC:1999 – 5 –
Page
Annex A Early-time HEMP and lightning radiated environments. 55
Annex B Arrangement showing the use of a distribution transformer with a primary delta
winding . 75
Annex C Transmission characteristics of protective measures . 77
Figure 1 – Example of penetration of radiated and conducted disturbances through
a two-barrier protection. . 15
Figure 2 – Voltage and current flowing through a gas arrester during a surge event. 19
Figure 3 – Concepts for wiring systems. 21
Figure 4 – Typical protection circuit. 35
Figure 5 – Solution to prevent surge current from radiating into protected area. 53
Table 1 – Building protection concepts. 45
Table 2 – Protection concepts for shielded enclosures . 47
Table 3 – Lightning and HEMP current waveforms which can be used for tests. 49

TR 61000-5-3 © IEC:1999 – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMAGNETIC COMPATIBILITY (EMC) –
Part 5-3: Installation and mitigation guidelines –
HEMP protection concepts
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports, technical specifications or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this technical report may be the subject of
patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
Technical reports do not necessarily have to be reviewed until the data they provide are
considered to be no longer valid or useful by the maintenance team.
IEC 61000-5-3, which is a technical report, has been prepared by subcommittee 77C: Immunity
to high altitude nuclear electromagnetic pulse (HEMP), of IEC technical committee 77:
Electromagnetic compatibility.
It has the status of a basic EMC publication in accordance with IEC Guide 107.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
77C/58/CDV 77C/69/RVC
Full information on the voting for the approval of this technical report 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 3.
This document, which is purely informative is not to be regarded as an International Standard.

TR 61000-5-3 © IEC:1999 – 9 –
INTRODUCTION
IEC 61000-5 is a part of the IEC 61000 series, according to the following structure:
Part 1: General
General considerations (introduction, fundamental principles)
Definitions, terminology
Part 2: Environment
Description of the environment
Classification of the environment
Compatibility levels
Part 3: Limits
Emission limits
Immunity limits (in so far as these limits do not fall under the responsibility of the product
committees)
Part 4: Testing and measurement techniques
Measurement techniques
Testing techniques
Part 5: Installation and mitigation guidelines
Installation guidelines
Mitigation methods and devices
Part 6: Generic standards
Part 9: Miscellaneous
TR 61000-5-3 © IEC:1999 – 11 –
ELECTROMAGNETIC COMPATIBILITY (EMC) –
Part 5-3: Installation and mitigation guidelines –
HEMP protection concepts
1 Scope
This part of IEC 61000 defines and gives information on protection concepts against
electromagnetic pulse due to a high altitude nuclear explosion (denoted in what follows by the
abbreviation HEMP).
The aim of this technical report is to provide elements for
– the design of an adequate protection for civil facilities against HEMP;
– the evaluation of already existing protections with respect to stresses imposed by HEMP;
– the comparison of the requirements of HEMP and lightning protection in order to show if
they can be combined at low cost;
– an emphasis of the differences between the requirements of HEMP and lightning protection
in order to permit an evaluation of the consequences of HEMP when no additional
measures are taken beyond existing lightning protection.
2 Reference documents
IEC 60050(161):1990, International Electrotechnical Vocabulary (IEV) – Chapter 161:
Electromagnetic compatibility
IEC 60060-2:1994, High voltage test techniques – Part 2: Measuring systems
IEC 60099-1:1991, Surge arresters – Part 1: Non-linear resistor type gapped arresters for a.c.
systems
IEC 61000-2-9:1996, Electromagnetic compatibility (EMC) – Part 2: Environment – Section 9:
Description of HEMP environment – Radiated disturbance. Basic EMC publication
IEC 61000-2-10:1998, Electromagnetic compatibility (EMC) – Part 2-10: Environment –
Description of HEMP environment – Conducted disturbance. Basic EMC publication
IEC 61000-2-11, Electromagnetic compatibility (EMC) – Part 2-11: Environment – Description
1)
of HEMP environment – Classification of HEMP environments
IEC 61000-4-5:1995, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 5: Surge immunity test
___________
1)
To be published.
TR 61000-5-3 © IEC:1999 – 13 –
IEC 61000-4-23, Electromagnetic compatibility (EMC) – Part 4-23: Testing and measurement
techniques – Test methods for protective devices for HEMP and other radiated disturbance.
1)
Basic EMC publication
IEC 61000-4-24:1997, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section
...