kSIST FprEN IEC 61400-40:2025

SLOVENSKI STANDARD
oSIST prEN IEC 61400-40:2024
01-december-2024
Sistemi za proizvodnjo vetrne energije - 40. del: Elektromagnetna združljivost
(EMC) - Zahteve in preskusne metode
Wind energry generation systems - Part 40: Electromagnetic compatibility (EMC) -
Requirements and test methods
Ta slovenski standard je istoveten z: prEN IEC 61400-40:2024
ICS:
27.180 Vetrne elektrarne Wind turbine energy systems
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
oSIST prEN IEC 61400-40:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 61400-40:2024
oSIST prEN IEC 61400-40:2024
88/1045/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61400-40 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-10-11 2025-01-03
SUPERSEDES DOCUMENTS:
88/1001/CD, 88/1037A/CC
IEC TC 88 : WIND ENERGY GENERATION SYSTEMS
SECRETARIAT: SECRETARY:
Denmark Mrs Christine Weibøl Bertelsen
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
CIS/H
ASPECTS CONCERNED:
Electromagnetic Compatibility
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
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TITLE:
Wind energry generation systems - Part 40: Electromagnetic Compatibility (EMC) - Requirements and
test methods
PROPOSED STABILITY DATE: 2027
NOTE FROM TC/SC OFFICERS:
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oSIST prEN IEC 61400-40:2024
88/1045//CDV 2 IEC CDV 61400-40 © IEC 2024
1 INTERNATIONAL ELECTROTECHNICAL COMMISSION
2 ____________
4 WIND ENERGY GENERATION SYSTEMS -
5 Part 40: Electromagnetic compatibility (EMC) - Requirements and test method
8 FOREWORD
9 1) The International Electrotechnical Commission (IEC) is a worldwide organization for
10 standardization comprising all national electrotechnical committees (IEC National
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12 concerning standardization in the electrical and electronic fields. To this end and in
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20 agreement between the two organizations.
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22 possible, an international consensus of opinion on the relevant subjects since each
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36 6) All users should ensure that they have the latest edition of this publication.
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41 publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
42 8) Attention is drawn to the Normative references cited in this publication. Use of the
43 referenced publications is indispensable for the correct application of this publication.
44 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may
45 be the subject of patent rights. IEC shall not be held responsible for identifying any or all
46 such patent rights.
47 International Standard IEC 61400-40 has been prepared by IEC technical committee 88: Wind
48 energy generation systems.
49 The text of this International Standard is based on the following documents:
Enquiry draft Report on voting
XX/XX/FDIS XX/XX/RVD
oSIST prEN IEC 61400-40:2024
IEC CDV 61400-4 © IEC 2024 3 88/1045/CDV
50 Full information on the voting for the approval of this International Standard can be found in
51 the report on voting indicated in the above table.
52 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
53 The committee has decided that the contents of this publication will remain unchanged until
54 the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
55 related to the specific publication. At this date, the publication will be
56 • reconfirmed,
57 • withdrawn,
58 • replaced by a revised edition, or
59 • amended.
oSIST prEN IEC 61400-40:2024
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CONTENTS
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols and units . 7
5 Abbreviations . 7
6 Operating conditions during testing. . 7
7 Emission requirements . 8
7.1 General . 8
7.2 Conducted Emissions . 8
7.3 Radiated Emissions . 8
7.3.1 General . 8
7.3.2 Measurement system . 10
7.3.3 Data recording . 10
7.3.4 Requirements for the wind turbine . 11
7.3.5 Requirements for the measurement site . 11
7.3.6 Weather conditions . 11
7.3.7 Measurement setup . 11
7.3.8 Description of the operating modes . 16
7.3.9 Limit values . 17
7.3.10 Measurement uncertainty . 17
7.4 Harmonics, interharmonics and higher frequency components . 17
7.5 Flicker . 17
8 Immunity requirements . 18
8.1 General . 18
8.2 Electrostatic Discharge . 18
8.3 Immunity to radiated electromagnetic fields . 18
8.4 Immunity to Burst EFT . 18
8.5 Surge tests . 18
8.6 Conducted Immunity . 18
8.7 Immunity to power frequency magnetic field . 18
8.8 Voltage dips, short interruptions and voltage variations . 18
9 Test report. 19
9.1 Test report requirements for emission tests of the wind turbine . 19
9.1.1 Wind turbine . 19
9.1.2 Antenna orientation for each measurement point . 19
9.1.3 Site description . 19
9.1.4 Description of the test setup . 19
9.1.5 Machine parameters . 19
9.1.6 Electrical network conditions . 20
9.1.7 Major components (make/model/serial number) . 20
9.2 Test report requirements for immunity tests . 20
Annex A . 21
Annex B . 22
Annex C . 23
Annex D . 24

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Annex E . 25

oSIST prEN IEC 61400-40:2024
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1 1 Scope
2 This part of IEC 61400 provides the EMC requirements and test methods that apply to the
3 individual wind turbine and all the sub systems which are part of the wind turbine.
4 The current document applies to measurements on individual wind turbines and not multiple
5 wind turbines.
6 This standard defines the requirements and test methods for the verification of the wind
7 turbine performance against radiated emissions and the immunity of their components against
8 conducted and radiated phenomena.
9 2 This standard is applicable to wind turbines to be installed at offshore and
10 onshore locations.Normative references
11 The following documents are referred to in the text in such a way that some or all of their
12 content constitutes requirements of this document. For dated references, only the edition
13 cited applies. For undated references, the latest edition of the referenced document (including
14 any amendments) applies.
15 CISPR 11: 2024, Industrial, scientific and medical equipment - Radio-frequency disturbance
16 characteristics - Limits and methods of measurement.
17 IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) - Part 4-2: Testing and
18 measurement techniques - Electrostatic discharge immunity test.
19  IEC 61000-4-3:2020, Electromagnetic compatibility (EMC) - Part 4-3: Testing and
20 measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test.
21  IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
22 measurement techniques – Electrical fast transient/burst immunity test.
23  IEC 61000-4-5:2014+AMD1:2017 CSV, Electromagnetic compatibility (EMC) - Part 4-5:
24 Testing and measurement techniques - Surge immunity test.
25  IEC 61000-4-6:2023, Electromagnetic compatibility (EMC) - Part 4-6: Testing and
26 measurement techniques - Immunity to conducted disturbances, induced by radio-frequency
27 fields.
28  IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
29 measurement techniques – Power frequency magnetic field immunity test.
30  IEC 61000-4-11:2020-COR:2022, Electromagnetic compatibility (EMC) - Part 4-11: Testing
31 and measurement techniques - Voltage dips, short interruptions and voltage variations
32 immunity tests.
33  IEC 61000-4-34:2005+AMD1:2009 CSV, Electromagnetic compatibility (EMC) - Part 4-34:
34 Testing and measurement techniques - Voltage dips, short interruptions and voltage
35 variations immunity tests for equipment with mains current more than 16 A per phase.
36 CISPR 16-2-3: 2016+AMD1:2019+AMD2:2023 CSV, Specification for radio disturbance and
37 immunity measuring apparatus and methods - Part 2-3: Methods of measurement of
38 disturbances and immunity - Radiated disturbance measurements
39 IEC 61000-6-2:2016, Generic standards - Immunity standard for industrial environments
40 CISPR 16-1-1:2019. Radio disturbance and immunity measuring apparatus
41 IEC 61400-1: wind turbines - Part 1: Design requirements
42 IEC 61400-2: wind turbines - Part 2: Small wind turbines.
43 IEC 61400-24:2019, wind turbines - Part 24: Lightning protection.

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44 CISPR TR 16-2-5: 2008, Specification for radio disturbance and immunity measuring
45 apparatus and methods - Part 2-5: In situ measurements for disturbing emissions produced by
46 physically large equipment
47 CISPR 16-4-2: 2011+AMD1:2014+AMD2:2018 CSV, Specification for radio disturbance and
48 immunity measuring apparatus and methods - Part 4-2: Uncertainties, statistics and limit
49 modelling - Measurement instrumentation uncertainty
50 IEC 61400-21-1:2019, Wind energy generation systems - Part 21-1: Measurement and
51 assessment of electrical characteristics – wind turbines
52 3 Terms and definitions
53 For the purposes of this document, the following terms and definitions apply.
54 ISO and IEC maintain terminological databases for use in standardization at the following
55 addresses:
56 • IEC Electropedia: available at www.electropedia.org/
57 • ISO Online browsing platform: available at www.iso.org/obp
58 • IEC 61400-1
59 • IEC 61400-2
60 • CISPR 11
61 4 Symbols and units
62 Only generic symbols and units are used in this document.
63 5 Abbreviations
64 Only generic abbreviations are used in this document.
65 6 Operating conditions during testing.
66 Operating conditions specific for this standard are included in the relevant chapters.

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67 7 Emission requirements
68 7.1 General
69 The wind turbine shall fulfil the emission requirements of this standard.
70 All subsystems shall fulfil the emission requirements of their product standard, product family
71 standards or the relevant generic standard.
72 7.2 Conducted Emissions
73 For radio protection purposes the magnetic field emissions of the whole wind turbine
74 enclosure are measured in this frequency range.
75 7.3 Radiated Emissions
76 7.3.1 General
77 Due to continuous variation of wind speed and other external influences the emissions of wind
78 turbines may vary during the measurements. Ambient signals and noise shall be distinguished from
79 emissions of the wind turbine.
80 An overview of a recommended test sequence is given in Figure 1 and Table 1.
81 Description of Figure 1:
82 The measurements shall be executed under the following conditions:
83 • Reference points and orientations of the antenna are given in 7.3.7.
84 • The adjustments of the EMI-Receiver are given in 7.3.7
85 • The operation modes of the wind turbine are given in 7.3.8.
86 • To distinguish the emission of the wind turbine from prevailing ambient emissions, all
87 measurements on one reference point of the antenna should be executed in sequence in
88 one (short time) block like shown in table 1. This to ensure minimum natural ambient
89 emissions variations influencing the measurements. The assessment for ambient
90 emission detection given in CISPR 16-2-3 Annex A4.3 to A5 shall be used.
91 • Discontinuous disturbances which occur sporadically shall be disregarded, like described
92 in CISPR 16-2-3 chapter 6.5.1.
93 • All measurements can be repeated multiple times.
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97 Figure 1: Flow chart of EMI measurement

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98 Table 1: Summary of measurements for each reference point of the antenna.
Id Operating mode Type of Frequency Antenna Antenna
measurement range elevation Polarization
Radial
1 Disconnected from the Magnetic field 150 kHz-30 MHz -
grid
2 Disconnected from the Electric field 30 MHz-1 GHz Tower base Vertical
grid
3 Disconnected from the Electric field 30 MHz-1 GHz Tower base Horizontal
grid
4 Disconnected from the Electric field 30 MHz-1 GHz Nacelle Vertical
grid
5 Disconnected from the Electric field 30 MHz-1 GHz Nacelle Horizontal
grid
Radial
6 Standby mode Magnetic field 150 kHz-30 MHz -
7 Standby mode Electric field 30 MHz-1 GHz Tower base Vertical
8 Standby mode Electric field 30 MHz-1 GHz Tower base Horizontal
9 Standby mode Electric field 30 MHz-1 GHz Nacelle Vertical
10 Standby mode Electric field 30 MHz-1 GHz Nacelle Horizontal
Radial
11 Medium load operation Magnetic field 150 kHz-30 MHz -
12 Medium load operation Electric field 30 MHz-1 GHz Tower base Vertical
13 Medium load operation Electric field 30 MHz-1 GHz Tower base Horizontal
14 Medium load operation Electric field 30 MHz-1 GHz Nacelle Vertical
15 Medium load operation Electric field 30 MHz-1 GHz Nacelle Horizontal
Radial
16 Increased load operation Magnetic field 150 kHz-30 MHz -
17 Increased load operation Electric field 30 MHz-1 GHz Tower base Vertical
18 Increased load operation Electric field 30 MHz-1 GHz Tower base Horizontal
19 Increased load operation Electric field 30 MHz-1 GHz Nacelle Vertical
20 Increased load operation Electric field 30 MHz-1 GHz Nacelle Horizontal
100 7.3.2 Measurement system
101 7.3.2.1 General
102 Antenna calibration at 10 m distance is acceptable for the testing.
103 CISPR 16-1-4 and CISPR 16-1-6 provides precise information for the calibration of antennas.
104 The EMC receiver shall fulfil requirements specified in CISPR 16-1-1 and CISPR 16-2-3.
105 7.3.2.2 Auxiliary measurement equipment
106 Auxiliary measurement equipment does not have to be calibrated as values are informative.
107 NOTE  The following are examples of the auxiliary measurement equipment: distance meter,
108 clock, compass, sensors of wind turbine data and sensor of meteorological data.
109 The sensor of meteorological data shall be placed in close vicinity of the selected measurement
110 points.
111 7.3.3 Data recording
112 Operation data of the wind turbine that are helpful to replicate the measurement should be recorded.
113 At least the active power values and the yaw angle shall be documented in the test report in 10
114 minutes RMS values.
115 Required operation data of the wind turbine shall be recorded at least in 10 min average values with a
116 time stamp.
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