IEC TR 62271-208:2009

IEC/TR 62271-208 ®
Edition 1.0 2009-10
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
High-voltage switchgear and controlgear –
Part 208: Methods to quantify the steady state, power-frequency electromagnetic
fields generated by HV switchgear assemblies and HV/LV prefabricated
substations
Appareillage à haute tension –
Partie 208: Méthodes de quantification des champs électromagnétiques à
fréquence industrielle en régime établi générés par les ensembles
d’appareillages HT et les postes préfabriqués HT/BT

IEC/TR 62271-208:2009
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IEC/TR 62271-208 ®
Edition 1.0 2009-10
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
High-voltage switchgear and controlgear –
Part 208: Methods to quantify the steady state, power-frequency electromagnetic
fields generated by HV switchgear assemblies and HV/LV prefabricated
substations
Appareillage à haute tension –
Partie 208: Méthodes de quantification des champs électromagnétiques à
fréquence industrielle en régime établi générés par les ensembles
d’appareillages HT et les postes préfabriqués HT/BT

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
X
CODE PRIX
ICS 29.130.10 ISBN 978-2-88910-657-8
– 2 – TR 62271-208 © IEC:2009
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope.7
2 Normative references .7
3 Terms and definitions .8
4 Evaluation requirements .9
4.1 General .9
4.2 Methods of evaluation .9
4.3 Evaluation of electric fields.10
4.3.1 HV switchgear assemblies.10
4.3.2 HV/LV prefabricated substations.10
4.4 Evaluation of magnetic fields.10
4.4.1 HV switchgear assemblies.10
4.4.2 HV/LV prefabricated substations.11
5 Measurements.12
5.1 General .12
5.2 Measuring instruments .12
5.3 Measurement procedures .12
5.3.1 General .12
5.3.2 Electric field .13
5.3.3 Magnetic field .16
5.3.4 Background fields .16
5.3.5 Environmental factors.16
5.4 Measurement set-up.17
5.4.1 General .17
5.4.2 Additional provisions for HV/LV prefabricated substations .20
6 Calculations .20
6.1 General .20
6.2 Software.21
6.3 Calculation procedures.21
6.4 Results.21
6.5 Validation .22
7 Documentation .22
7.1 Characteristics of the HV switchgear assembly or prefabricated substation .22
7.2 Evaluation method.22
7.3 Presentation of the measurement results.22
7.4 Presentation of the calculation results .23
Annex A (informative) Presentation of E or B field measurement data – Example for a
typical HV/LV pre-fabricated substation .24
Annex B (informative) Examples of analytical solutions to benchmark EMF

calculations.27
Bibliography.45

Figure 1 – Example of test circuits configuration to obtain the maximum external
magnetic field of a switchgear assembly and/or a prefabricated substation .11
Figure 2 – Reference surface (RS) for equipment of irregular shape .13

– 3 –
TR 62271-208 © IEC:2009
Figure 3 – Scanning areas to find the hot spots .14
Figure 4 – Determination of the field variation as a function of the distance from the
hot spot locations (perpendicular to the reference surface) .15
Figure 5 – Test set-up of main components, external cables, hot spot locations and
measurement volume.18
Figure 6 – Test circuit for electric and magnetic field measurement .19
Figure A.1 – Hot spot locations representing the field maxima .24
Figure A.2 – Graphical presentation of the field variation .25
Figure A.3 – Example diagram for the field variation at hot spots .26
Figure B.1 – Schematic for 3-phase magnetic field calculation.27
Figure B.2 – Variation of resultant magnetic field around 3-phase cable .30
Figure B.3 – Maximum resultant magnetic field around 3-phase cable .31
Figure B.4 – Schematic for 3-phase electric field calculation.35
Figure B.5 – Variation of resultant electric field around 3-phase cable .38
Figure B.6 – Maximum resultant electric field around 3-phase cable .40

Table A.1 – Listing of the hot spot coordinates.25
Table A.2 – Variation of field values for one hot spot .25
Table A.3 – Background fields .26
Table B.1 – Values of H for spatial angles θ and time angles ωt .30
res
Table B.2 – Values of maximum H for spatial angles θ.32
res
Table B.3 – Values of E for spatial angles θ and time angles ωt.39
res
Table B.4 – Values of maximum E for spatial angles θ .40

– 4 – TR 62271-208 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –

Part 208: Methods to quantify the steady state,
power-frequency electromagnetic fields
generated by HV switchgear assemblies
and HV/LV prefabricated substations

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, gove
...