oSIST prEN IEC 62271-208:2024

SLOVENSKI STANDARD
01-julij-2024
Visokonapetostne stikalne in krmilne naprave - 208. del: Metode za kvantifikacijo
elektromagnetnih polj v ustaljenem stanju z močjo in frekvenco, ki jih generirajo
visokonapetostne VN omrežne stikalne naprave in VN/NN montažne postaje, tako
za nazivno napetost nad 1 kV kot do vključno 52 kV
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, both for rated voltages above 1 kV and up to and
including 52 kV
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, à la fois pour les tensions assignées
supérieures à 1 kv et inférieures ou égales à 52 kv
Ta slovenski standard je istoveten z: prEN IEC 62271-208:2024
ICS:
29.130.10 Visokonapetostne stikalne in High voltage switchgear and
krmilne naprave controlgear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

17C/932/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62271-208 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-05-03 2024-07-26
SUPERSEDES DOCUMENTS:
17C/893/CD, 17C/915A/CC
IEC SC 17C : ASSEMBLIES
SECRETARIAT: SECRETARY:
Germany Mr Mark Kuschel
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 17,SC 17A
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
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TITLE:
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, both for rated voltages above 1 kV and up to and
including 52 kV
PROPOSED STABILITY DATE: 2033
NOTE FROM TC/SC OFFICERS:
download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National
Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for
any other purpose without permission in writing from IEC.

IEC CDV 62271-208 © IEC 2024 2 17C/932/CDV

1 CONTENTS
3 FOREWORD. 4
4 INTRODUCTION . 6
5 1 Scope . 7
6 2 Normative references . 7
7 3 Terms and definitions . 8
8 4 Evaluation requirements . 9
9 4.1 General . 9
10 4.2 Methods of evaluation . 9
11 4.3 Evaluation of electric fields . 10
12 4.3.1 HV assemblies . 10
13 4.3.2 HV/LV prefabricated substations . 10
14 4.4 Evaluation of magnetic fields . 10
15 4.4.1 HV assemblies . 10
16 4.4.2 HV/LV prefabricated substations . 11
17 5 Measurements . 11
18 5.1 General . 11
19 5.2 Measuring instruments . 12
20 5.3 Measurement procedures . 12
21 5.3.1 General . 12
22 5.3.2 Hot spot measurement procedure . 13
23 5.3.3 Isoline measurement procedure . 17
24 5.4 Measurement set-up . 18
25 5.4.1 General . 18
26 5.4.2 Hot spot measurement set-up . 18
27 5.4.3 Isoline measurement set-up . 20
28 5.4.4 External connections . 21
29 5.4.5 Additional provisions for HV/LV prefabricated substations . 22
30 6 Calculations . 22
31 6.1 General . 22
32 6.2 Software . 22
33 6.3 Calculation procedures . 23
34 6.4 Results . 23
35 6.5 Validation . 23
36 7 Documentation . 24
37 7.1 Characteristics of the HV assembly or prefabricated substation . 24
38 7.2 Evaluation method . 24
39 7.3 Presentation of the measurement results. 24
40 7.4 Presentation of the calculation results . 24
41 Annex A (informative) Presentation of E or B field measurement data – Examples for
42 a typical HV/LV prefabricated substation . 26
43 A.1 Presentation of Hot spot B-field measurement results . 26
44 A.1.1 Hot spot locations . 27
45 A.1.2 Hot spot locations with its E or B field values . 27
46 A.1.3 Variation of the E or B field as a function of the distance . 28
47 A.1.4 Field variation around substation at hot spot locations . 29
48 A.1.5 Background fields . 29
49 A.2 Presentation of Isoline E or B field measurement results . 30

IEC CDV 62271-208 © IEC 2024 3 17C/932/CDV

50 A.2.1 Location of measurement points on Isoline . 30
51 A.2.2 Background fields . 31
52 A.2.3 Example of an Isoline measurement on a 1600 kVA power
53 transformer substation . 31
54 Annex B (informative) Examples of analytical solutions to benchmark EMF
55 calculations . 32
56 B.1 Magnetic field . 32
57 B.2 Electric field . 40
59 Figure 1 – Example of test circuits configuration to obtain the maximum external
60 magnetic field of a switchgear assembly and/or a prefabricated substation. . 11
61 Figure 2 – Reference surface (RS) for equipment of irregular shape. . 13
62 Figure 3 – Scanning areas to find the hot spots. . 14
63 Figure 4 – Determination of the field variation as a function of the distance from the
64 hot spot locations (perpendicular to the reference surface). . 15
65 Figure 5 - Height of measurement plane. . 17
66 Figure 6 – Test circuit for electric and magnetic field measurement. . 19
67 Figure 7 – Test set-up of main components, external cables, hot spot locations and
68 measurement volume. . 20
69 Figure 8 – Test set-up of main components, external cables and measurement
70 volume. . 21
72 Figure A. 1 – Hot spot locations representing the field maxima. . 27
73 Figure A. 2 – Graphical presentation of the field variation. . 28
74 Figure A. 3 – Example diagram for the field variation at hot spots. . 29
75 Figure A. 4 – Graphical presentation of measurement points on Isoline. . 30
76 Figure A. 5 – Isoline of 10 µT for a 1600 kVA substation. . 31
78 Figure B. 1 – Schematic for 3-phase magnetic field calculation. . 32
79 Figure B. 2 – Variation of resultant magnetic field around 3-phase cable. . 35
80 Figure B. 3 – Maximum resultant magnetic field around 3-phase cable. . 36
81 Figure B. 4 – Schematic for 3-phase electric field calculation. . 40
82 Figure B. 5 – Variation of resultant electric field around 3-phase cable. . 43
83 Figure B. 6 – Maximum resultant electric field around 3-phase cable. . 45
85 Table A. 1 – Listing of the hot spot coordinates. . 27
86 Table A. 2 – Variation of field values for one hot spot. . 28
87 Table A. 3 – Background fields. . 29
88 Table A. 4 – Listing of the location (coordinates) of the measurement points . 30
89 Table A. 5 – Background fields ……………………………………………………………………….31
91 Table B. 1 – Values of H [A/m] for spatial angles θ and time angles ωt. . 35
res
92 Table B. 2 – Values of maximum H [A/m] for spatial angles θ. . 37
res
93 Table B. 3 – Values of E [V/m] for spatial angles θ and time angles ωt. . 43
res
94 Table B. 4 – Values of maximum E for spatial angles θ. . 45
IEC CDV 62271-208 © IEC 2024 4 17C/932/CDV

96 INTERNATIONAL ELECTROTECHNICAL COMMISSION
97 ____________
99 HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR –
101 Part 208: Methods to quantify the steady state,
102 power-frequency electromagnetic fields
103 generated by HV switchgear assemblies
104 and HV/LV prefabricated substations,
105 both for rated voltages above 1 kV
106 and up to and including 52 kV
109 FOREWORD
110 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
111 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
112 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
113 this end and in addition to other activities, IEC publishes
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