IEC 62110:2009

IEC 62110 ®
Edition 1.0 2009-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric and magnetic field levels generated by AC power systems –
Measurement procedures with regard to public exposure

Champs électriques et magnétiques générés par les systèmes d’alimentation à
courant alternatif – Procédures de mesure des niveaux d’exposition du public

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IEC 62110 ®
Edition 1.0 2009-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric and magnetic field levels generated by AC power systems –
Measurement procedures with regard to public exposure

Champs électriques et magnétiques générés par les systèmes d’alimentation à
courant alternatif – Procédures de mesure des niveaux d’exposition du public

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 17.220.20; 29.240 ISBN 2-8318-1059-3
– 2 – 62110  IEC:2009
CONTENTS
FOREWORD. 5
INTRODUCTION . 7
1 Scope . 8
2 Normative reference . 8
3 Terms and definitions . 8
4 Measurement principle for electric and magnetic fields . 9
4.1 General . 9
4.2 Instruments . 9
4.3 Harmonic content . 10
4.4 Record of measurement result . 10
4.5 Measurement considerations . 11
4.5.1 Field orientation . 11
4.5.2 Measurement locations . 12
4.5.3 Perturbing effects of an operator in electric field measurement . 12
4.5.4 Effects from other sources in magnetic field measurement . 12
4.5.5 Humidity condition in electric field measurement . 12
5 Fundamental measurement procedures for electric and magnetic fields . 12
5.1 General procedure . 12
5.2 Single-point measurement . 13
5.3 Three-point measurement . 13
5.4 Five-point measurement . 14
6 Measurement procedures for finding the maximum exposure level to an electric
field . 15
6.1 Overhead lines . 15
6.2 Underground cables . 15
6.3 Substations and power system equipment . 15
7 Measurement procedures for finding the maximum exposure level to a magnetic
field . 16
7.1 Overhead lines . 16
7.2 Underground cables . 16
7.3 Substations and power system equipment . 16
Annex A (informative) Characteristics of electric fields generated by AC overhead
lines . 18
Annex B (informative) Characteristics of magnetic fields generated by AC power
systems . 30
Annex C (informative) Concept of the three-point measurement with regard to the
average exposure level . 42
Annex D (informative) Example of a reporting form for field measurement . 47
Bibliography . 50

Figure 1 – Heights of the three-point measurement . 13
Figure 2 – Five-point measurement . 14
Figure A.1 – Linear charge distribution above ground . 19
Figure A.2 – General n-phase system with ground . 20
Figure A.3 – Electric field levels under an overhead transmission line . 22

62110  IEC:2009 – 3 –
Figure A.4 – Electric field levels under an overhead transmission line with bundled
conductors . 22
Figure A.5 – Electric field levels and non-uniformity under a 77 kV overhead
transmission line – Effect of heights of conductors . 24
Figure A.6 – Electric field levels and non-uniformity under a 500 kV overhead
transmission line – Effects of the heights of conductors . 25
Figure A.7 – Electric field levels under a 77 kV overhead transmission line – Effect of
separation between conductors . 26
Figure A.8 – Electric field levels and non-uniformity under a 500 kV overhead
transmission line – Effect of separation between conductors . 27
Figure A.9 – Vertical and horizontal components of electric field levels under a 77 kV
overhead transmission line . 27
Figure A.10 – Vertical and horizontal components of electric field levels under a
500 kV overhead transmission line . 28
Figure A.11 – Electric field contour of a 25 kV overhead line . 28
Figure A.12 – Electric field profile along the wall of a building and at 1 m above ground
level . 29
Figure B.1 – Magnetic field levels under a 77 kV overhead transmission line . 32
Figure B.2 – Magnetic field levels under a 500 kV overhead transmission line . 33
Figure B.3 – Magnetic field levels and non-uniformity under a 77 kV overhead
transmission line – Effect of heights of conductors . 34
Figure B.4 – Magnetic field levels and non-uniformity under a 500 kV overhead
transmission line – Effect of heights of conductors . 35
Figure B.5 – Magnetic field levels and non-uniformity under a 77 kV overhead
transmission line – Effect of separation between conductors . 36
Figure B.6 – Magnetic field levels under a 500 kV overhead transmission line – Effect
of separation between conductors . 37
Figure B.7 – Values of semi-major and semi-minor components (r.m.s.) of magnetic
field levels under a 77 kV overhead transmission line . 38
Figure B.8 – Values of semi-major and semi-minor components (r.m.s.) of magnetic
field levels under a 500 kV overhead transmission line . 38
Figure B.9 – Magnetic field levels and non-uniformity under an overhead distribution
line (6 600 V / 100 V) . 39
Figure B.10 – Magnetic field levels and non-uniformity above underground cables –
Effect of buried depth . 40
Figure B.11 – Magnetic field levels and non-uniformity above underground cables –
Effect of separation between conductors . 40
Figure B.12 – Measured magnetic field levels and non-uniformity around a 6 600 V
pad-mounted transformer . 41
Figure B.13 – Measured mag
...