IEC TR 61000-5-6:2002

Electromagnetic compatibility (EMC) - Part 5-6: Installation and mitigation guidelines - Mitigation of external EM influences

This Technical Report covers guidelines for the mitigation of external electromagnetic influences impinging upon a facility, 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. More particularly, this technical report is concerned with the arrangement of shielding and screening against radiated disturbances, and with mitigation of conducted disturbances. These arrangements include appropriate electromagnetic barriers for industrial, commercial, and residential installations. Is intended for use by installers, manufacturers and users of sensitive electrical or electronic installations or systems, and of equipment with emission levels that could degrade the overall electromagnetic (EM) environment. It applies primarily to new installations but, where economically feasible, it may be applied to extensions or modifications to existing facilities.

General Information

• Status: Replaced
• Publication Date: 04-Jun-2002
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.100.01 - Electromagnetic compatibility in general
• Technical Committee: SC 77C - High power transient phenomena

Relations

• Revised: IEC 61000-5-6:2024 - Electromagnetic compatibility (EMC) - Part 5-6: Installation and mitigation guidelines - Mitigation of external EM influences
• Effective Date: 12-Apr-2024

Standards Content (Sample)

TECHNICAL IEC
REPORT
TR 61000-5-6
First edition
2002-06
PUBLICATION FONDAMENTALE EN CEM
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –
Part 5-6:
Installation and mitigation guidelines –
Mitigation of external EM influences
Compatibilité électromagnétique (CEM) –
Partie 5-6:
Guides d'installation et d'atténuation –
Atténuation des influences électromagnétiques externes
Reference number
IEC/TR 61000-5-6:2002(E)
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.
Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,
edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the
base publication incorporating amendment 1 and the base publication incorporating
amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
• IEC Web Site (www.iec.ch)
• Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/catlg-e.htm) enables
you to search by a variety of criteria including text searches, technical
committees and date of publication. On-line information is also available on
recently issued publications, withdrawn and replaced publications, as well as
corrigenda.
• IEC Just Published
This summary of recently issued publications (www.iec.ch/JP.htm) is also
available by email. Please contact the Customer Service Centre (see below) for
further information.
• Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:
Email: [e-mail]
Tel: [phone]
Fax: [phone]
TECHNICAL IEC
REPORT
TR 61000-5-6
First edition
2002-06
PUBLICATION FONDAMENTALE EN CEM
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –
Part 5-6:
Installation and mitigation guidelines –
Mitigation of external EM influences
Compatibilité électromagnétique (CEM) –
Partie 5-6:
Guides d'installation et d'atténuation –
Atténuation des influences électromagnétiques externes
 IEC 2002  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
X
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – TR 61000-5-6  IEC:2002(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope and general considerations.6
1.1 Scope.6
1.2 General considerations.6
2 Reference documents.8
3 Terms, definitions and acronyms .10
4 Mitigation of radiated and conducted disturbances .13
4.1 Topological concepts.13
4.2 Mitigation needs .14
4.3 The general concept of enclosure.15
4.4 Interactions at the enclosure boundary.16
5 Shielding .16
5.1 General .16
5.2 Classification of protection zones .18
5.3 Design principles for screening.19
5.4 Implementation of screening.21
6 Filters.26
6.1 General .26
6.2 Fundamental filter characteristics .27
6.3 Functional tasks .29
6.4 Additional filtering concerns .30
6.5 Selection criteria .30
6.6 Filter installation.33
6.7 Filter testing .36
7 Decoupling devices .37
7.1 Isolation transformers.37
7.2 Motor-generator sets .39
7.3 Engine generators .40
7.4 Uninterruptible power supplies (UPS) .40
7.5 Optical links .41
8 Surge-protective devices .41
8.1 General .41
8.2 Direct equipment protection.42
8.3 Installation of multiple SPDs.43
8.4 Side-effects of uncoordinated cascades .44
8.5 Typical protective devices .44
Bibliography.45

TR 61000-5-6  IEC:2002(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMAGNETIC COMPATIBILITY (EMC) –
Part 5-6: Installation and mitigation guidelines –
Mitigation of external EM influences
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 specifications, technical reports 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 61000-5-6, which is a technical report, has been prepared by subcommittee 77C: High
power transient phenomena, 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/110/CDV 77C/122/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 document, which is purely informative, is not to be regarded as an International
Standard.
– 4 – TR 61000-5-6  IEC:2002(E)
The committee has decided that the contents of this publication will remain unchanged until
2007. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
A bilingual version of this technical report may be issued at a later date.

TR 61000-5-6  IEC:2002(E) – 5 –
INTRODUCTION
IEC 61000 is published in separate parts 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 they do not fall under the responsibility of 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
Each part is further subdivided into several parts published either as International Standards
or as technical specifications or technical reports, some of which have already been published
as sections. Others will be published with the part number followed by a dash and a second
number identifying the subdivision (example: IEC 61000-6-1).
This part of IEC 61000 gives guidelines for the mitigation of external electromagnetic
influences.
– 6 – TR 61000-5-6  IEC:2002(E)
ELECTROMAGNETIC COMPATIBILITY (EMC) –
Part 5-6: Installation and mitigation guidelines –
Mitigation of external EM influences
1 Scope and general considerations
1.1 Scope
This part of IEC 61000 covers guidelines for the mitigation of external electromagnetic
influences impinging upon a facility, 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. More particularly, this technical
report is concerned with the arrangement of shielding and screening against radiated
disturbances, and with mitigation of conducted disturbances. These arrangements include
appropriate electromagnetic barriers for industrial, commercial, and residential installations.
The concept of barriers installed for mitigating potentially penetrating and unwanted
electromagnetic noise is applicable even when there is no designed-in electromagnetic shield.
The enclosure through which power and signal (communications, control, etc.) cables must
enter or exit may be considered as a potential electromagnetic barrier that will provide some
level of protection. The concept of enclosure can be understood as the perimeter walls of a
building, the walls of a single room, or the housing of an apparatus, with protection installed
at all points of electromagnetic penetration into the enclosure.
This technical report is intended for use by installers, manufacturers and users of sensitive
electrical or electronic installations or systems, and of equipment with emission levels that
could degra
...

TECHNICAL IEC
REPORT
TR 61000-5-6
First edition
2002-06
PUBLICATION FONDAMENTALE EN CEM
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –
Part 5-6:
Installation and mitigation guidelines –
Mitigation of external EM influences
Compatibilité électromagnétique (CEM) –
Partie 5-6:
Guides d'installation et d'atténuation –
Atténuation des influences électromagnétiques externes

Reference number
IEC/TR 61000-5-6:2002(E)
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,

edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
Further information on IEC publications
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology. Information relating to
this publication, including its validity, is available in the IEC Catalogue of
publications (see below) in addition to new editions, amendments and corrigenda.
Information on the subjects under consideration and work in progress undertaken
by the technical committee which has prepared this publication, as well as the list
of publications issued, is also available from the following:
• IEC Web Site (www.iec.ch)
• Catalogue of IEC publications
The on-line catalogue on the IEC web site (www.iec.ch/catlg-e.htm) enables
you to search by a variety of criteria including text searches, technical
committees and date of publication. On-line information is also available on
recently issued publications, withdrawn and replaced publications, as well as
corrigenda.
• IEC Just Published
This summary of recently issued publications (www.iec.ch/JP.htm) is also
available by email. Please contact the Customer Service Centre (see below) for
further information.
• Customer Service Centre
If you have any questions regarding this publication or need further assistance,
please contact the Customer Service Centre:
Email: [e-mail]
Tel: [phone]
Fax: [phone]
TECHNICAL IEC
REPORT
TR 61000-5-6
First edition
2002-06
PUBLICATION FONDAMENTALE EN CEM
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –
Part 5-6:
Installation and mitigation guidelines –
Mitigation of external EM influences
Compatibilité électromagnétique (CEM) –
Partie 5-6:
Guides d'installation et d'atténuation –
Atténuation des influences électromagnétiques externes

 IEC 2002  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail]  Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
X
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – TR 61000-5-6  IEC:2002(E)

CONTENTS
FOREWORD.3

INTRODUCTION.5

1 Scope and general considerations.6

1.1 Scope.6

1.2 General considerations.6

2 Reference documents.8

3 Terms, definitions and acronyms .10
4 Mitigation of radiated and conducted disturbances .13
4.1 Topological concepts.13
4.2 Mitigation needs .14
4.3 The general concept of enclosure.15
4.4 Interactions at the enclosure boundary.16
5 Shielding .16
5.1 General .16
5.2 Classification of protection zones .18
5.3 Design principles for screening.19
5.4 Implementation of screening.21
6 Filters.26
6.1 General .26
6.2 Fundamental filter characteristics .27
6.3 Functional tasks .29
6.4 Additional filtering concerns .30
6.5 Selection criteria .30
6.6 Filter installation.33
6.7 Filter testing .36
7 Decoupling devices .37
7.1 Isolation transformers.37
7.2 Motor-generator sets .39
7.3 Engine generators .40
7.4 Uninterruptible power supplies (UPS) .40
7.5 Optical links .41
8 Surge-protective devices .41
8.1 General .41
8.2 Direct equipment protection.42
8.3 Installation of multiple SPDs.43
8.4 Side-effects of uncoordinated cascades .44
8.5 Typical protective devices .44
Bibliography.45

TR 61000-5-6  IEC:2002(E) – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
ELECTROMAGNETIC COMPATIBILITY (EMC) –

Part 5-6: Installation and mitigation guidelines –

Mitigation of external EM influences

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 specifications, technical reports 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 61000-5-6, which is a technical report, has been prepared by subcommittee 77C: High
power transient phenomena, 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/110/CDV 77C/122/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 document, which is purely informative, is not to be regarded as an International
Standard.
– 4 – TR 61000-5-6  IEC:2002(E)

The committee has decided that the contents of this publication will remain unchanged until
2007. At this date, the publication will be

• reconfirmed;
• withdrawn;
• replaced by a revised edition, or

• amended.
A bilingual version of this technical report may be issued at a later date.

TR 61000-5-6  IEC:2002(E) – 5 –

INTRODUCTION
IEC 61000 is published in separate parts 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 they do not fall under the responsibility of 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
Each part is further subdivided into several parts published either as International Standards
or as technical specifications or technical reports, some of which have already been published
as sections. Others will be published with the part number followed by a dash and a second
number identifying the subdivision (example: IEC 61000-6-1).
This part of IEC 61000 gives guidelines for the mitigation of external electromagnetic
influences.
– 6 – TR 61000-5-6  IEC:2002(E)

ELECTROMAGNETIC COMPATIBILITY (EMC) –

Part 5-6: Installation and mitigation guidelines –

Mitigation of external EM influences

1 Scope and general considerations

1.1 Scope
This part of IEC 61000 covers guidelines for the mitigation of external electromagnetic
influences impinging upon a facility, 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. More particularly, this technical
report is concerned with the arrangement of shielding and screening against radiated
disturbances, and with mitigation of conducted disturbances. These arrangements include
appropriate electromagnetic barriers for industrial, commercial, and residential installations.
The concept of barriers installed for mitigating potentially penetrating and unwanted
electromagnetic noise is applicable even when there is no designed-in electromagnetic shield.
The enclosure through which power and signal (communications, control, etc.) cables must
enter or exit may be considered as a potential electromagnetic barrier that will provide some
level of protection. The concept of enclosure can be understood as the perimeter walls of a
building, the walls of a single room, or the housing of an apparatus, with protection installed
at all points of electromagnetic penetration into the enclosure.
This tech
...