SIST-TP IEC/TR 61000-3-6:2016

Electromagnetic compatibility (EMC) - Part 3-6: Limits - Assessment of emission limits for the connection of distorting installations to MV, HV and EHV power systems

This Technical Report, which is informative in its nature, provides guidance on principles which can be used as the basis for determining the requirements for the connection of distorting installations to MV, HV and EHV public power systems (LV installations are covered in other IEC documents). For the purposes of this report, a distorting installation means an installation (which may be a load or a generator) that produces harmonics and/or interharmonics. The primary objective is to provide guidance to system operators or owners on engineering practices, which will facilitate the provision of adequate service quality for all connected customers. In addressing installations, this document is not intended to replace equipment standards for emission limits. The report addresses the allocation of the capacity of the system to absorb disturbances. It does not address how to mitigate disturbances, nor does it address how the capacity of the system can be increased. Since the guidelines outlined in this report are necessarily based on certain simplifying assumptions, there is no guarantee that this approach will always provide the optimum solution for all harmonic situations. The recommended approach should be used with flexibility and judgment as far as engineering is concerned, when applying the given assessment procedures in full or in part. The system operator or owner is responsible for specifying requirements for the connection of distorting installations to the system. The distorting installation is to be understood as the customer's complete installation (i.e. including distorting and non-distorting parts). Problems related to harmonics fall into two basic categories:
/ - Harmonic currents that are injected into the supply system by converters and harmonic sources, giving rise to harmonic voltages in the system. Both harmonic currents and resulting voltages can be considered as conducted phenomena.
- Harmonic currents that induce interference into communication systems. This phenomenon is more pronounced at higher order harmonic frequencies because of increased coupling between the circuits and because of the higher sensitivity of the communication circuits in the audible range.
This report gives guidance for the co-ordination of the harmonic voltages between different voltage levels in order to meet the compatibility levels at the point of utilisation. The recommendations in this report do not address harmonic interference phenomena in communication circuits (i.e. only the first of the above categories is addressed). This second edition cancels and replaces the first edition published in 1996 and constitutes a technical revision. This edition is significantly more streamlined than first edition, and it reflects the experiences gained in the application of the first edition. As part of this streamlining process, this second edition of IEC/TR 61000-3-6 does not address communications circuit interference. Clause 9 on this (section 10) was removed, as this did not suitably address emission limits for telephone interference. The scope has been adjusted to point out that IEC/TR 61000-3-6 does not address communications circuit interference. This edition has also been harmonised with IEC/TR 61000-3-7 and IEC/TR 61000-3-13. This Technical Report has the status of a basic EMC publication in accordance with IEC Guide 107.

Elektromagnetna združljivost (EMC) - 3-6. del: Mejne vrednosti - Ocena oddajnih mej za priklop motečih naprav v SN, VN in EVN elektroenergetska omrežja

To informativno tehnično poročilo podaja napotke glede načel, ki jih je mogoče uporabiti kot osnovo za določanje zahtev za priklop motečih naprav v javna srednjenapetostna (MV) in visokonapetostna (HV) elektroenergetska omrežja ter elektroenergetska omrežja zelo visoke napetosti (EHV) (nizkonapetostne naprave so obravnavane v drugih dokumentih Mednarodne elektrotehniške komisije). Moteča naprava je za namene tega poročila naprava (ki je lahko obremenitev ali generator), ki proizvaja harmonike in/ali medharmonike. Glavni cilj je operaterjem ali lastnikom sistema zagotoviti napotke za inženirske prakse, kar bo olajšalo zagotavljanje ustrezne kakovosti storitev za vse priklopljene odjemalce. Namen tega poročila v okviru obravnavanja naprav ni nadomestitev standardov opreme za oddajne meje. Poročilo obravnava dodelitev zmogljivosti sistema za namene blaženja motenj. Ne obravnava tega, kako zmanjšati motnje ali kako povečati zmogljivost sistema. Ker napotki v tem poročilu temeljijo na nekaterih predpostavkah poenostavljenosti, ni zajamčeno, da bo ta pristop zagotavljal optimalno rešitev pri vseh primerih harmonikov. Priporočeni pristop mora pri inženiringu vključevati določeno mero prilagajanja in presojanja, ko se uporabljajo podani postopki ocenjevanja v celoti ali delno. Upravljavec ali lastnik sistema je odgovoren za določitev zahtev za priklop motečih naprav v sistem. Moteča naprava se obravnava kot celotna naprava odjemalca (tj. vključno z motečimi in nemotečimi deli). Težave v zvezi s harmoniki spadajo v dve osnovni kategoriji:
/ – Harmonski tokovi, ki jih v napajalni sistem dovajajo pretvorniki in viri harmonikov, zaradi česar v sistemu nastanejo harmonske napetosti. Tako harmonski tokovi kot nastale napetosti se lahko obravnavajo kot prevajani pojavi.
– Harmonski tokovi, ki inducirajo motnje v komunikacijskih sistemih. Ta pojav je izrazitejši pri harmonskih frekvencah višjega reda zaradi močnejše povezave tokokrogov in večje občutljivosti komunikacijskih tokokrogov v slišnem obsegu.
To poročilo podaja napotke za uskladitev harmonskih napetosti med različnimi napetostnimi ravnmi za doseganje ravni združljivosti na točki uporabe. Priporočila v tem poročilu ne obravnavajo pojavov harmonskih motenj v komunikacijskih tokokrogih (tj. obravnava le prvo od zgornjih kategorij). Ta druga izdaja razveljavlja in nadomešča prvo izdajo, objavljeno leta 1996, in predstavlja tehnično popravljeno izdajo. Ta izdaja je precej bolj poenostavljena od prve izdaje in vključuje informacije, pridobljene pri uporabi prve izdaje. Kot del postopka poenostavitve ta druga izdaja standarda IEC/TR 61000-3-6 ne obravnava motenj komunikacijskih tokokrogov. Točka 9 v tej izdaji (razdelek 10) je bila odstranjena, ker ni ustrezno obravnavala oddajnih mej za motnje telefonskih omrežij. Področje uporabe je bilo prilagojeno za prikaz tega, da IEC/TR 61000-3-6 ne obravnava motenj komunikacijskih tokokrogov. Poleg tega je bila ta izdaja usklajena s standardoma IEC/TR 61000-3-7 in IEC/TR 61000-3-13. To tehnično poročilo ima status osnovne objave o elektromagnetni združljivosti v skladu z vodilom 107 Mednarodne elektrotehniške komisije.

General Information

• Status: Published
• Public Enquiry End Date: 31-Aug-2013
• Publication Date: 04-Apr-2016
• ICS: 33.100.10 - Emission
• Technical Committee: EMC - Electromagnetic compatibility
• Current Stage: 6100 - Translation of adopted SIST standards (Adopted Project)
• Start Date: 05-Feb-2019
• Due Date: 04-Feb-2020
• Completion Date: 10-May-2021
• Ref Project: IEC/TR 61000-3-6 - Electromagnetic compatibility (EMC) - Part 3-6: Limits - Assessment of emission limits for the connection of distorting installations to MV, HV and EHV power systems

Relations

• Replaces: SIST-TP IEC/TR3 61000-3-6:2004 - Electromagnetic compatibility (EMC) - Part 3-6: Limits - Assessment of emission limits for the connection of distorting installations to MV, HV and EHV power systems
• Effective Date: 01-May-2013

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2016
1DGRPHãþD
SIST-TP IEC/TR3 61000-3-6:2004
(OHNWURPDJQHWQD]GUXåOMLYRVW(0&GHO0HMQHYUHGQRVWL2FHQDRGGDMQLK
PHM]DSULNORSPRWHþLKQDSUDYY6191LQ(91HOHNWURHQHUJHWVNDRPUHåMD
Electromagnetic compatibility (EMC) - Part 3-6: Limits - Assessment of emission limits for
the connection of distorting installations to MV, HV and EHV power systems
Ta slovenski standard je istoveten z: IEC/TR 61000-3-6
ICS:
33.100.10 Emisija Emission
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Edition 2.0 2008-02
TECHNICAL
REPORT
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –
Part 3-6: Limits – Assessment of emission limits for the connection of distorting
installations to MV, HV and EHV power systems

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XA
CODE PRIX
ICS 33.100.10 ISBN 2-8318-9605-3

– 2 – TR 61000-3-6 © IEC:2008(E)
CONTENTS
FOREWORD.4
INTRODUCTION.6
ACKNOWLEDGMENT.7

1 Scope.8
2 Normative references .9
3 Terms and definitions .9
4 Basic EMC concepts related to harmonic distortion .13
4.1 Compatibility levels .13
4.2 Planning levels.14
4.3 Illustration of EMC concepts.16
4.4 Emission levels .17
5 General principles .18
5.1 Stage 1: simplified evaluation of disturbance emission .18
5.2 Stage 2: emission limits relative to actual system characteristics.19
5.3 Stage 3: acceptance of higher emission levels on a conditional basis.19
5.4 Responsibilities .19
6 General guidelines for the assessment of emission levels .20
6.1 Point of evaluation.20
6.2 Definition of harmonic emission level.20
6.3 Assessment of harmonic emission levels.21
6.4 System harmonic impedance.22
7 General summation law .24
8 Emission limits for distorting installations connected to MV systems.25
8.1 Stage 1: simplified evaluation of disturbance emission .25
8.2 Stage 2: emission limits relative to actual system characteristics.27
8.3 Stage 3: acceptance of higher emission levels on a conditional basis.31
8.4 Summary diagram of the evaluation procedure .32
9 Emission limits for distorting installations connected to HV-EHV systems .33
9.1 Stage 1: simplified evaluation of disturbance emission .33
9.2 Stage 2: emission limits relative to actual system characteristics.33
9.3 Stage 3: acceptance of higher emission levels on a conditional basis.36
10 Interharmonics .36

Annex A (informative) Envelope of the maximum expected impedance .38
Annex B (informative) Guidance for allocating planning levels and emission levels at
MV .39
Annex C (informative) Example of calculation of global MV+LV contribution .45
Annex D (informative) Method for sharing planning levels and allocating emission
limits in meshed HV – EHV systems .46
Annex E (informative) List of symbols and subscripts.54

Bibliography.57

TR 61000-3-6 © IEC:2008(E) – 3 –
Figure 1 – Illustration of basic voltage quality concepts with time/ location statistics
covering the whole system .17
Figure 2 – Illustration of basic voltage quality concepts with time statistics relevant to
one site within the whole system .17
Figure 3 – Illustration of the emission vector U and its contribution to the measured
hi
harmonic vector at the point of evaluation .20
Figure 4 – Example of a system for sharing global contributions at MV .28
Figure 5 – Diagram of evaluation procedure at MV.32
Figure 6 – Determination of S for a simple HV or EHV system.33
t
Figure 7 – Allocation of planning level to a substation in HV-EHV system .34
Figure A.1 – Example of maximum impedance curve for a 11 kV system .38
Figure B.1 – Example of an MV distribution system showing the MV transformer and
feeders 1-6.42
Figure D.1 – HV-EHV system considered for the connection of a new distorting
installation at node 1 substation .48
Figure D.2 – Harmonic Impedance at node 1 .49
Figure D.3 – Harmonic Impedance at node 5 ‘Uranus 150 kV’, when the capacitor
banks at Jupiter 150 kV are switched off .50

Table 1 – Compatibility levels for individual harmonic voltages in low and medium
voltage networks (percent of fundamental component) reproduced from
IEC 61000-2-2 [5] and IEC 61000-2-12 [6].14
Table 2 – Indicative planning levels for harmonic voltages (in percent of the
fundamental voltage) in MV, HV and EHV power systems.15
Table 3 – Summation exponents for harmonics (indicative values).25
Table 4 – Weighting factors W for different types of harmonic producing equipments.27
j
Table 5 – Indicative values for some odd order harmonic current emission limits
relative to the size of a customer installation .28
Table B.1 – Feeder characteristics for the system under consideration .43
Table B.2 – Determination of F and Sxℓ values for the feeders.43
Table C.1 – Acceptable global contribution G of the MV and LV installations to
hMV+LV
the MV harmonic voltages if the transfer coefficient from the HV-EHV system is
considered to be unity .45
Table D.1 – Influence coefficients K between node j and node 1 .49
hj-1
Table D.2 – Reduction factors.51
Table D.3 – Global contributions G at node 1.52
hB1
– 4 – TR 61000-3-6 © IEC:2008(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROMAGNETIC COMPATIBILITY (EMC) –

Part 3-6: Limits –
Assessment of emission limits for the connection of distorting
installations to MV, HV and EHV power systems

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
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
frequency phenomena, of IEC technical committee 77: Electromagnetic compatibility.
This Technical Report forms Part 3-6 of IEC 61000. It has the status of a basic EMC
publication in accordance with IEC Guide 107 [29] .
This second edition cancels and replaces the first edition published in 1996 and constitutes a
technical revision.
___________
Figures in square brackets refer to the Bibliography.

TR 61000-3-6 © IEC:2008(E) – 5 –
This edition is significantly more streamlined than first edition, and it reflects the experiences
gained in the application of the first edition. As part of this streamlining process, this second
edition of IEC/TR 61000-3-6 does not address communications circuit interference. Clause 9
on this (section 10) was removed, as this did not suitably address emission limits for
telephone interference. The scope has been adjusted to point out that IEC/TR 61000-3-6 does
not address communications circuit interference. This edition has also been harmonised with
IEC/TR 61000-3-7 [30] and IEC/TR 61000-3-13 [31].
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
77A/575/DTR 77A/637/RVC
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
A list of all parts of the IEC 61000 series, un
...

SIST-TP IEC/TR 61000-3-6
SLOVENSKO
TEHNIČNO  maj 2016
POROČILO
Elektromagnetna združljivost (EMC) – 3-6. del: Mejne vrednosti –
Ocena mejnih vrednosti oddajanja za priklop motečih naprav v SN-, VN- in
EVN-elektroenergetska omrežja
Electromagnetic compatibility (EMC) – Part 3-6: Limits – Assessment of emission
limits for the connection of distorting installations to MV, HV and EHV power
systems
Referenčna oznaka
ICS 33.100.10 SIST-TR IEC/TR3 61000-3-6:2016 (sl)

Nadaljevanje na straneh od 2 do 58

© 2021-05. Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno.

SIST-TP IEC/TR 61000-3-6 : 2016
NACIONALNI UVOD
Tehnično poročilo SIST-TP IEC/TR 61000-3-6 (sl), Elektromagnetna združljivost (EMC) – 3-6. del:
Mejne vrednosti – Ocena oddajnih mej za priklop motečih naprav v SN-, VN- in EVN-elektroenergetska
omrežja, 2016, ima status slovenskega tehničnega poročila in je istovetno mednarodnemu tehničnemu
poročilu IEC/TR 61000-3-6 (en), Electromagnetic compatibility (EMC) – Part 3-6: Limits – Assessment
of emission limits for the connection of distorting installations to MV, HV and EHV power systems, 2008.

To tehnično poročilo nadomešča SIST-TP IEC/TR3 61000-3-6:2004.

NACIONALNI PREDGOVOR
Mednarodno tehnično poročilo IEC/TR 61000-3-6:2008 je pripravil tehnični odbor IEC/TC 77A
Nizkofrekvenčni pojavi. Slovensko tehnično poročilo SIST-TP IEC/TR 61000-3-6:2016 je prevod
mednarodnega tehničnega poročila IEC/TR 61000-3-6:2008. V primeru spora glede besedila
slovenskega prevoda v tem dokumentu je odločilna izvirno mednarodno tehnično poročilo v angleškem
jeziku. Slovensko izdajo tehničnega poročila je potrdil tehnični odbor SIST/TC EMC Elektromagnetna
združljivost.
Odločitev za privzem tega tehničnega poročila je v aprilu 2016 sprejel tehnični odbor SIST/TC EMC
Elektromagnetna združljivost.
ZVEZA Z NACIONALNIMI STANDARDI

S privzemom tega evropskega standarda veljajo za omejeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:
IEC 60050(161) Mednarodni elektrotehniški slovar (IEV) - Poglavje – 161. del:
Elektromagnetna združljivost
OSNOVA ZA IZDAJO TEHNIČNEGA POROČILA

– privzem tehničnega poročila IEC/TR 61000-3-6 ed. 2.0

PREDHODNA IZDAJA
– SIST-TP IEC/TR3 61000-3-6:2004

OPOMBE
– Povsod, kjer se v besedilu standarda uporablja izraz "mednarodno tehnična poročilo", v SIST-TP
– Nacionalni uvod in nacionalni predgovor nista sestavni del tehničnega poročila.

SIST-TP IEC/TR 61000-3-6 : 2016

VSEBINA Stran
Predgovor . 5
Uvod . 7
Zahvala . 8
1 Področje uporabe . 9
2 Zveze s standardi . 10
3 Izrazi in definicije . 10
4 Temeljni koncepti EMC v zvezi s harmonskim popačenjem . 14
4.1 Ravni združljivosti . 14
4.2 Ravni načrtovanja . 15
4.3 Ponazoritev konceptov EMC . 17
4.4 Ravni oddajanja . 18
5 Splošna načela . 19
5.1 Stopnja 1: poenostavljena ocena oddajanja motnje . 19
5.2 Stopnja 2: mejne vrednosti oddajanja glede na dejanske karakteristike sistema . 20
5.3 Stopnja 3: sprejetje višjih ravni oddajanja pod posebnimi pogoji . 20
5.4 Odgovornosti . 20
6 Splošne smernice za ocenjevanje ravni oddajanja . 21
6.1 Mesto vrednotenja . 21
6.2 Opredelitev ravni oddajanja harmonikov . 21
6.3 Ocena ravni oddajanja harmonikov . 22
6.4 Harmonska impedanca sistema . 23
7 Splošni sumirni zakon . 25
8 Mejne vrednosti oddajanja za moteče postroje, priključene v SN-sisteme . 26
8.1 Stopnja 1: poenostavljeno vrednotenje oddajanja motnje. 26
8.2 Stopnja 2: oddajne mejne vrednosti relativne glede na dejanske karakteristike sistema . 28
8.3 Stopnja 3: sprejetje višjih ravni oddajanja pod posebnimi pogoji . 32
8.4 Diagram povzetka postopka ocenjevanja . 33
9 Mejne vrednosti oddajanja za moteče postroje, priključene v VN-EVN sisteme . 34
9.1 Stopnja 1: poenostavljena ocena oddajanja motnje . 34
9.2 Stopnja 2: mejne vrednosti oddajanja glede na dejanske karakteristike sistema . 34
9.3 Stopnja 3: sprejetje višjih ravni oddajanja pod posebnimi pogoji . 37
10 Medharmoniki . 37
Dodatek A (informativni): Ovojnica največje pričakovane impedance . 39
Dodatek B (informativni): Vodilo za dodelitev ravni načrtovanja in ravni oddajanja na srednji
napetosti . 40
Dodatek C (informativni): Primer izračuna globalnega prispevka SN+NN . 45
Dodatek D (informativni): Metode za delitev ravni načrtovanja in dodelitev ravni oddajanja
v zazankanih VN-EVN-sistemih . 46
Dodatek E (informativni): Seznam simbolov in indeksov . 54
Literatura. 57

SIST-TP IEC/TR 61000-3-6 : 2016

Slika 1: Ponazoritev temeljnih konceptov kakovosti napetosti s statistiko čas/lokacija,
ki predstavlja ves sistem . 18
Slika 2: Ponazoritev temeljnih konceptov kakovosti napetosti s statistiko časa,
ki se nanaša na eno mesto znotraj celotnega sistema . 18
Slika 3: Ponazoritev vektorja oddajanja U in njegovega prispevka
hi
k merjenemu harmonskemu vektorju na mestu vrednotenja . 21
Slika 4: Primer sistema za delitev globalnih prispevkov na srednji napetosti . 29
Slika 5: Shema postopka ocenjevanja na srednji napetosti . 33
Slika 6: Določitev S za preprost VN- ali EVN-sistem . 34
t
Slika 7: Dodelitev ravni načrtovanja postaje v VN-EVN-sistemu . 35
Slika A.1: Primer največje impedančne krivulje za sistem 11 kV . 39
Slika B.1: Primer SN-distribucijskega sistema s prikazom SN-transformatorja in izvodov 1–6 . 42
Slika D.1: Obravnavani VN-EVN-sistem za priključitev novega motečega postroja
v postaji vozlišča 1 . 48
Slika D.2: Harmonska impedanca v vozlišču 1 . 49
Slika D.3: Harmonska impedanca v vozlišču 5 "Uranus 150 kV", pri čemer so kondenzatorji
v Jupitru 150 kV izključeni . 50

Preglednica 1: Ravni združljivosti za posamezne harmonske napetosti v nizko- in
srednjenapetostnih omrežjih (odstotek temeljne komponente), povzeto po IEC 61000-2-2 [5]
in IEC 61000-2-12 [6] . 15
Preglednica 2: Indikativne ravni načrtovanja za harmonske napetosti
(v odstotkih temeljne komponente) v SN-, VN- in EVN-elektroenergetskih sistemih . 16
Preglednica 3: Eksponenti sumirnega zakona za harmonike (indikativne vrednosti) . 26
Preglednica 4: Utežnostni faktorji W za različne vrste opreme, ki povzroča harmonike . 28
j
Preglednica 5: Indikativne vrednosti mejnih vrednosti oddajanja za nekatere lihe rede
harmonskega toka glede na velikost uporabnikovega postroja . 29
Preglednica B.1: Lastnosti izvoda obravnavanega sistema . 43
Preglednica B.2: Določitev vrednosti F in Sxℓ za izvode . 44
Preglednica C.1: Sprejemljivi globalni prispevki G SN- in NN-postrojev k
hMV+LV
SN-harmonski napetosti, če je koeficient prenosa iz VN-EVN-sistema enak ena . 45
Preglednica D.1: Vplivni koeficienti K med vozliščema j in 1 . 49
hj-1
Preglednica D.2: Redukcijski faktorji . 51
Preglednica D.3: Globalni prispevki G v vozlišču 1 . 52
hB1
SIST-TP IEC/TR 61000-3-6 : 2016

MEDNARODNA ELEKTROTEHNIŠKA KOMISIJA

ELEKTROMAGNETNA ZDRUŽLJIVOST (EMC)

3-6. del: Mejne vrednosti – Ocena mejnih vrednosti oddajanja za priklop
motečih naprav v SN-, VN- in EVN-elektroenergetska omrežja

Predgovor
1. Mednarodna elektrotehniška komisija (IEC) je svetovna organizacija za standardizacijo, ki združuje vse nacionalne
elektrotehnične komiteje (nacionalni komiteji IEC). Cilj IEC je pospeševati mednarodno sodelovanje v vseh vprašanjih
standardizacije s področja elektrotehnike in elektronike. V ta namen poleg drugih aktivnosti izdaja mednarodne standarde,
tehnične specifikacije, tehnična poročila, javno dostopne specifikacije (PAS) in vodila (v nadaljevanju: publikacije IEC). Za
njihovo pripravo so odgovorni tehnični odbori; vsak nacionalni komite IEC, ki ga zanima obravnavana tema, lahko sodeluje
v tem pripravljalnem delu. Prav tako lahko v pripravi sodelujejo mednarodne organizacije ter vladne in nevladne ustanove,
ki so povezane z IEC. IEC deluje v tesni povezavi z mednarodno organizacijo za standardizacijo ISO skladno s pogoji,
določenimi v soglasju med obema organizacijama.
2. Uradne odločitve ali sporazumi IEC o tehničnih vprašanjih, pripravljeni v tehničnih odborih, kjer so prisotni vsi nacionalni
komiteji, ki jih tema zanima, izražajo, kolikor je mogoče, mednarodno soglasje o obravnavani temi.
3. Publikacije IEC imajo obliko priporočil za mednarodno uporabo ter jih kot takšne sprejmejo nacionalni komiteji IEC. Čeprav
IEC skuša zagotavljati natančnost tehničnih vsebin v publikacijah IEC. IEC ni odgovoren za način uporabe ali za možne
napačne interpretacije končnih uporabnikov.
4. Da bi se pospeševalo mednarodno poenotenje, so nacionalni komiteji IEC v svojih nacionalnih in regionalnih standardih
dolžni čim pregledneje uporabljati mednarodne standarde. Vsako odstopanje med standardom IEC in ustreznim
nacionalnim ali regionalnim standardom je treba v slednjem jasno označiti.
5. IEC sam ne izvaja potrjevanja skladnosti. Storitve ugotavljanja skladnosti in na nekaterih območjih tudi dostop do znakov
skladnosti IEC izvajajo neodvisni certifikacijski organi. IEC ni določil nobenega postopka v zvezi z označevanjem kot znakom
strinjanja in ne prevzema nikakršne odgovornosti za storitve, ki jih izvajajo neodvisni certifikacijski organi. opremo, ki je
deklarirana, da ustreza kateremu od publikacij IEC.
6. Vsi uporabniki naj bi si zagotovili zadnjo izdajo teh publikacij.
7. IEC ali njegovi direktorji, zaposleni, uslužbenci ali agenti, vključno s samostojnimi strokovnjaki ter člani tehničnih
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