EN 61000-4-7:2002/A1:2009
(Amendment)Electromagnetic compatibility (EMC) - Part 4-7: Testing and measurement techniques - General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto
Electromagnetic compatibility (EMC) - Part 4-7: Testing and measurement techniques - General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto
Elektromagnetische Verträglichkeit (EMV) - Teil 4-7: Prüf- und Messverfahren - Allgemeiner Leitfaden für Verfahren und Geräte zur Messung von Oberschwingungen und Zwischenharmonischen in Stromversorgungsnetzen und angeschlossenen Geräten
Compatibilité électromagnétique (CEM) - Partie 4-7: Techniques d'essai et de mesure - Guide général relatif aux mesures d'harmoniques et d'interharmoniques, ainsi qu'à l'appareillage de mesure, applicable aux réseaux d'alimentation et aux appareils qui y sont raccordés
Elektromagnetna združljivost (EMC) - 4-7. del: Preskusne in merilne tehnike - Splošno vodilo za meritve in merilno opremo za merjenje harmonikov in medharmonikov v napajalnih omrežjih in nanje priključeno opremo (IEC 61000-4-7:2002/A1:2008)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2009
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PHGKDUPRQLNRYYQDSDMDOQLKRPUHåMLKLQQDQMHSULNOMXþHQRRSUHPR ,(&
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Electromagnetic compatibility (EMC) -- Part 4-7: Testing and measurement techniques -
General guide on harmonics and interharmonics measurements and instrumentation, for
power supply systems and equipment connected thereto
Elektromagnetische Verträglichkeit (EMV) -- Teil 4-7: Prüf- und Messverfahren -
Allgemeiner Leitfaden für Verfahren und Geräte zur Messung von Oberschwingungen
und Zwischenharmonischen in Stromversorgungsnetzen und angeschlossenen Geräten
Compatibilité électromagnétique (CEM) -- Partie 4-7: Techniques d'essai et de mesure -
Guide général relatif aux mesures d'harmoniques et d'interharmoniques, ainsi qu'à
l'appareillage de mesure, applicable aux réseaux d'alimentation et aux appareils qui y
sont raccordés
Ta slovenski standard je istoveten z: EN 61000-4-7:2002/A1:2009
ICS:
33.100.20 Imunost Immunity
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 61000-4-7/A1
NORME EUROPÉENNE
March 2009
EUROPÄISCHE NORM
ICS 33.100.10; 33.100.20
English version
Electromagnetic compatibility (EMC) -
Part 4-7: Testing and measurement techniques -
General guide on harmonics and interharmonics measurements
and instrumentation,
for power supply systems and equipment connected thereto
(IEC 61000-4-7:2002/A1:2008)
Compatibilité électromagnétique (CEM) - Elektromagnetische Verträglichkeit (EMV) -
Partie 4-7: Techniques d'essai Teil 4-7: Prüf- und Messverfahren -
et de mesure - Allgemeiner Leitfaden für Verfahren
Guide général relatif aux mesures und Geräte zur Messung
d'harmoniques et d'interharmoniques, von Oberschwingungen
ainsi qu'à l'appareillage de mesure, und Zwischenharmonischen
applicable aux réseaux d'alimentation in Stromversorgungsnetzen
et aux appareils qui y sont raccordés und angeschlossenen Geräten
(CEI 61000-4-7:2002/A1:2008) (IEC 61000-4-7:2002/A1:2008)
This amendment A1 modifies the European Standard EN 61000-4-7:2002; it was approved by CENELEC on
2009-03-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CENELEC member into its own language and notified to the
Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61000-4-7:2002/A1:2009 E
Foreword
The text of document 77A/645/FDIS, future amendment 1 to IEC 61000-4-7:2002, prepared by SC 77A,
Low frequency phenomena, of IEC TC 77, Electromagnetic compatibility, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 61000-4-7:2002
on 2009-03-01.
The following dates were fixed:
– latest date by which the amendment has to be
implemented at national level by publication of
an identical national standard or by endorsement (dop) 2009-12-01
– latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2012-03-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of amendment 1:2008 to the International Standard IEC 61000-4-7:2002 was approved by
CENELEC as an amendment to the European Standard without any modification.
__________
- 3 - EN 61000-4-7:2002/A1:2009
Replace Annex ZA of EN 61000-4-7:2002 by:
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1) 2) 3)
IEC 60038 - IEC standard voltages HD 472 S1 1989
+ corr. February 2002
A1 1995
1)
IEC 60050-161 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 161: Electromagnetic compatibility
1) 3)
IEC 61000-2-2 - Electromagnetic compatibility (EMC) - EN 61000-2-2 2002
Part 2-2: Environment - Compatibility levels
for low-frequency conducted disturbances and
signalling in public low-voltage power supply
systems
1) 3)
IEC 61000-3-2 - Electromagnetic compatibility (EMC) - EN 61000-3-2 2006
Part 3-2: Limits - Limits for harmonic current
emissions (equipment input current ≤ 16 A per
phase)
1) 3)
IEC 61000-3-12 - Electromagnetic compatibility (EMC) - EN 61000-3-12 2005
Part 3-12: Limits - Limits for harmonic currents
produced by equipment connected to public
low-voltage systems with input current > 16 A
and ≤ 75 A per phase
1)
Undated reference.
2)
The title of HD 472 S1 is: Nominal voltages for low-voltage public electricity supply systems.
3)
Valid edition at date of issue.
IEC 61000-4-7
Edition 2.0 2008-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Electromagnetic compatibility (EMC) –
Part 4-7: Testing and measurement techniques – General guide on harmonics
and interharmonics measurements and instrumentation, for power supply
systems and equipment connected thereto
Compatibilité électromagnétique (CEM) –
Partie 4-7: Techniques d'essai et de mesure – Guide général relatif aux mesures
d'harmoniques et d'interharmoniques, ainsi qu'à l'appareillage de mesure,
applicable aux réseaux d'alimentation et aux appareils qui y sont raccordés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
T
CODE PRIX
ICS 33.100.10; 33.100.20 ISBN 2-8318-9848-X
– 2 – 61000-4-7 Amend. 1 © IEC:2008
FOREWORD
This amendment has been prepared by subcommittee 77A: Low frequency phenomena, of
IEC technical committee 77: Electromagnetic compatibility.
The text of this amendment is based on the following documents:
FDIS Report on voting
77A/645/FDIS 77A/651/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
Page 13
2 Normative references
Insert, in the existing list, the following standards:
IEC 60038, IEC standard voltages
IEC 61000-2-2, Electromagnetic compatibility (EMC) – Part 2-2: Environment – Compatibility
levels for low-frequency conducted disturbances and signalling in public low-voltage power
supply systems
IEC 61000-3-12, Electromagnetic compatibility (EMC) – Part 3-12: Limits – Limits for
harmonic currents produced by equipment connected to public low-voltage systems with input
current >16 A and ≤75 A per phase
Delete from the existing list the following standard:
IEC 61967-1, Integrated circuits – Measurement of electromagnetic emissions, 150 kHz to
1 GHz – Part 1: Measurement conditions and definitions
Pages 15 and 17
3.1 Definitions related to frequency analysis
Replace the entire subclause, including the NOTES, by the following new text:
Notations: The following notations are used in the present guide for the Fourier series
development because it is easier to measure phase angles by observations of the zero
crossings:
61000-4-7 Amend. 1 © IEC:2008 – 3 –
∞
k
⎛ ⎞
()
f t = c + c sin⎜ ω t + ϕ ⎟ (1)
0 ∑ k 1 k
N
⎝ ⎠
k =1
⎧
2 2
c = b + ja = a + b
k k k
⎪ k k
⎪
c
k
⎪
Y =
C,k
⎪
⎪
⎛ a ⎞ ⎛ a ⎞
⎪
k k
⎜ ⎟ ⎜ ⎟
ϕ =π + arctan if b < 0 ϕ = arctan if b > 0
k k k k
⎪ ⎟
⎜ ⎟ ⎜
b b
⎝ k ⎠ ⎝ k⎠
⎪
⎨
with: (2)
π π
⎪
ϕ = if b = 0 and a > 0 ϕ = − if b = 0 and a < 0
k k k k k k
2 2
⎪
⎪
ϕ = 0 if b ≤ ε and a ≤ ε,
k k k
⎪
⎪
with ε = 0,05 % U and ε = 0,15 % I
nom nom
⎪
or ε = 0,15 % U and ε = 0,5 % I
⎪ nom nom
⎪
respectively, see table 1 in IEC 61000-4-7
⎩
T
⎧
N
2 ⎛ k ⎞
⎪
b = f()t × sin ω t dt
⎜ ⎟
k 1
∫
⎪
T N
⎝ ⎠
N
⎪ 0
⎪
T
N
⎪
2 k
⎛ ⎞
a = f()t × cos ω t dt
⎜ ⎟
⎨
and: k 1 (3)
∫
T N
⎝ ⎠
N
⎪
⎪
T
N
⎪
⎪
c = f()t dt
∫
⎪ T
N
⎩
NOTE 1 The above definition setting φ to zero for the cases where b and a have very small values provides
k k k
guidance to instrument manufacturers, as phase measurements of very small amplitudes may result in very large
deviations, hence there is no requirement to measure phase for such small signals.
ω is the angular frequency of the fundamental (ω = 2πf );
1 1 H,1
T is the width (or duration) of the time window; the time window is that time span of a time
N
function over which the Fourier transform is performed;
c is the d.c. component;
k
c is the amplitude of the component with frequency f = f ;
k C,k H,1
N
Y is the r.m.s. value of component c ;
C,k k
f is the fundamental frequency of the power system;
H,1
k is the ordinal number (order of the spectral component) related to the frequency resolution
⎛ ⎞
f = ;
⎜ ⎟
C,1
T
N
⎝ ⎠
N is the number of fundamental periods within the window width;
ϕ is the phase angle of spectral line k.
k
– 4 – 61000-4-7 Amend. 1 © IEC:2008
NOTE 2 Strictly speaking these definitions apply to steady-state signals only. The Fourier series is actually in
most cases performed digitally, i.e. as a Discrete Fourier Transform DFT, or a variant thereof, being the FFT.
The analogue signal f(t) which has to be analyzed is sampled, A/D-converted and stored. Each group of M samples
forms a time window on which DFT is performed. According to the principles of Fourier series expansion, the
window width T determines the frequency resolution f = 1/T (i.e. the frequency separation of the spectral
N C,1 N
components) for the analysis. Therefore the window width T must be an integer multiple N of the fundamental
N
period T of the system voltage: T = N × T . The sampling rate is in this case f = M/(NT ) (where M = number of
1 s
1 N
samples within T ).
N
Before DFT-processing, the samples in the time window are often weighted by multiplying them with a special
symmetrical function ('windowing function'). However, for periodic signals and synchronous sampling it is
preferable to use a rectangular weighting window which multiplies each sample by unity.
The DFT-processor yields the orthogonal Fourier-coefficients a and b of the corresponding spectral-component
k k
frequencies f = k/T , k = 0, 1, 2 . M-1. However, only k values up to and including half of the maximum value are
C,k N
useful, the other half just duplicates them.
Under synchronized conditions, the component of harmonic order h related to the fundamental frequency f
H,1
appears as the spectral component of order k, where k = hN.
NOTE 3 The Fast Fourier Transform FFT is a special algorithm allowing short computation times. It requires that
i
the number of samples M be an integer power of 2, M = 2 , with i ≥ 10 for example.
NOTE 4 The symbol Y is replaced, as required by the symbol I for currents, by the symbol U for voltages. Index C
qualifies the variable as spectral component.
Page 17
3.2 Definitions related to harmonics
Replace the existing terms and definitions 3.2.1 to 3.2.5, including NOTES, if any, by the
following:
3.2.1
harmonic frequency
f
H,h
frequency which is an integer multiple of the fundamental frequency of the power system
(f = h × f )
H,h H,1
NOTE The harmonic frequency f is identical with the component frequency f with k = h × N.
H,h C,k
3.2.2
harmonic order
h
(integer) ratio of a harmonic frequency to the fundamental frequency of the power system. In
connection with the analysis using DFT and synchronisation between f and f (sampling
H,1 s
rate), the harmonic order h corresponds to the spectral component k = h × N (k = number of
the spectral component, N = number of periods of the fundamental frequency in time window
T )
N
3.2.3
r.m.s. value of a harmonic component
Y
H,h
r.m.s. value of one of the components having a harmonic frequency in the analysis of a non-
sinusoidal waveform
For brevity, such a component may be referred to simply as a “harmonic”
NOTE 1 The harmonic component Y is identical with the spectral component Y with k = h×N;
H,h C,k
(Y = Y ). The symbol Y is replaced, as required by the symbol I for currents, by the symbol U for voltages.
H,h C,h×N
The ind
...
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