SIST EN IEC 60071-2:2023

Insulation co-ordination - Part 2: Application guidelines (Proposed horizontal standard)

This part of IEC 60071 constitutes application guidelines and deals with the selection of insulation levels of equipment or installations for three-phase a.c. systems. Its aim is to give guidance for the determination of the rated withstand voltages for ranges I and II of IEC 60071- 1 and to justify the association of these rated values with the standardized highest voltages for equipment.
This association is for insulation co-ordination purposes only. The requirements for human safety are not covered by this document.
This document covers three-phase a.c. systems with nominal voltages above 1 kV. The values derived or proposed herein are generally applicable only to such systems. However, the concepts presented are also valid for two-phase or single-phase systems.
This document covers phase-to-earth, phase-to-phase and longitudinal insulation.
This document is not intended to deal with routine tests. These are to be specified by the relevant product committees.
The content of this document strictly follows the flow chart of the insulation co-ordination process presented in Figure 1 of IEC 60071-1:2019. Clauses 5 to 8 correspond to the squares in this flow chart and give detailed information on the concepts governing the insulation coordination process which leads to the establishment of the required withstand levels.
This document emphasizes the necessity of considering, at the very beginning, all origins, all classes and all types of voltage stresses in service irrespective of the range of highest voltage for equipment. Only at the end of the process, when the selection of the standard withstand voltages takes place, does the principle of covering a particular service voltage stress by a standard withstand voltage apply. Also, at this final step, this document refers to the correlation made in IEC 60071-1 between the standard insulation levels and the highest voltage for equipment.
The annexes contain examples and detailed information which explain or support the concepts described in the main text, and the basic analytical techniques used.

Isolationskoordination – Teil 2: Anwendungsrichtlinie

Coordination de l'isolement - Partie 2: Lignes directrices en matière d'application

IEC 60071-2:2023 est disponible sous forme de IEC 60071-2:2023 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L'IEC 60071-2:2023 constitue des lignes directrices en matière d'application et concerne le choix des niveaux d'isolement des matériels ou des installations pour les réseaux triphasés en courant alternatif. Elle a pour objet de donner des recommandations pour la détermination des tensions de tenue assignées pour les plages I et II de l'IEC 60071-1 et de justifier l'association de ces valeurs assignées avec les valeurs normalisées des tensions les plus élevées pour le matériel. Cette association ne couvre que les besoins de la coordination de l'isolement. Les exigences relatives à la sécurité des personnes ne sont pas traitées dans le présent document. Le présent document traite des réseaux triphasés en courant alternatif de tension nominale supérieure à 1 kV. Le présent document traite de l'isolement phase-terre, entre phases et longitudinal. Le présent document a le statut d'une norme horizontale conformément au Guide 108 de l'IEC. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) l'Article 4, Concepts applicables à la coordination de l'isolement, a été ajouté;
lb) e 5.3 a été révisé et le 5.4, Simulation détaillée, a été ajouté, car la simulation est largement appliquée dans les récentes pratiques de coordination de l'isolement;
c) des points particuliers ont été ajoutés pour les câbles et pour les lignes de transport/barres blindées à isolation gazeuse à l'Article 9;
d) l'Annexe K (informative), Application d'une inductance shunt pour la limitation des TOV et des SFO dans les lignes de transport aériennes à haute tension, a été ajoutée;
e) l'Annexe L (informative), Calcul du taux de foudroiement et du taux de coupure due à la foudre, a été ajoutée.

Koordinacija izolacije - 2. del: Smernice za uporabo (predlagan horizontalni standard)

Ta del standarda IEC 60071 predstavlja smernice za uporabo in obravnava izbiro izolacijske stopnje opreme ali naprav za trifazne sisteme z izmeničnim tokom. Njegov namen je podati smernice za ugotavljanje naznačenih najvišjih vrednosti za razpona I in II standarda IEC 60071-1 ter utemeljiti povezavo med temi nazivnimi vrednostmi in standardizirano najvišjo napetostjo opreme.
Ta povezava je namenjena samo koordinaciji izolacije. Zahteve za varnost ljudi niso obravnavane v tem dokumentu.
Ta dokument zajema trifazne sisteme z izmeničnim tokom, katerih nazivne napetosti znašajo nad 1 kV. Vrednosti, izpeljane ali predlagane v tem dokumentu, se na splošno uporabljajo samo za tovrstne sisteme. Kljub temu pa predstavljeni koncepti veljajo tudi za dvofazne in enofazne sisteme.
Ta dokument zajema dozemno, medfazno in longitudinalno izolacijo.
Ta dokument ni namenjen obravnavi rutinskih preskusov. Te morajo določiti ustrezni tehnični odbori.
Vsebina tega dokumenta strogo sledi diagramu poteka za postopek koordinacije izolacije, ki je predstavljen na sliki 1 v standardu IEC 60071-1:2019. Točke 5 do 8 se ujemajo s kvadratki na tem diagramu in podajajo podrobne informacije o konceptih, ki veljajo za postopek koordinacije izolacije, s katerim se dosežejo zahtevane stopnje vzdržljivosti.
Ta dokument poudarja, da je že na samem začetku treba upoštevati vse izvore, vse razrede in vse vrste napetostnih obremenitev med delovanjem, ne glede na razpon najvišje napetosti opreme. Šele na koncu postopka, ko je treba izbrati standardne najvišje napetosti, se uporabi načelo, pri katerem se določi standardna najvišja napetost za posamezno napetostno obremenitev med delovanjem. Prav tako se pri tem zadnjem koraku dokument nanaša na korelacijo, navedeno v standardu IEC 60071-1, med standardnimi stopnjami izolacije in najvišjo napetostjo opreme.
Ta dodatek vsebuje primere in podrobne informacije, ki pojasnjujejo ali utemeljujejo koncepte, opisane v glavnem besedilu, ter navaja osnovne uporabljene analitske tehnike.

General Information

• Status: Published
• Public Enquiry End Date: 26-Jul-2022
• Publication Date: 16-Aug-2023
• ICS: 29.080 - Insulation
• ICS: 29.080.01 - Electrical insulation in general
• ICS: 29.080.30 - Insulation systems
• Technical Committee: IVNI - High voltage power installations
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-Jul-2023
• Due Date: 17-Sep-2023
• Completion Date: 17-Aug-2023
• Ref Project: EN IEC 60071-2:2023 - Insulation co-ordination - Part 2: Application guidelines

Relations

• Revised: SIST EN IEC 60071-2:2018 - Insulation co-ordination - Part 2: Application guidelines (IEC 60071-2:2018)
• Effective Date: 06-Jul-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 60071-2:2023
01-september-2023
Koordinacija izolacije - 2. del: Smernice za uporabo (predlagan horizontalni
standard)
Insulation co-ordination - Part 2: Application guidelines (Proposed horizontal standard)
Isolationskoordination – Teil 2: Anwendungsrichtlinie
Coordination de l'isolement - Partie 2: Lignes directrices en matière d'application
Ta slovenski standard je istoveten z: EN IEC 60071-2:2023
ICS:
29.080.01 Električna izolacija na Electrical insulation in
splošno general
SIST EN IEC 60071-2:2023 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60071-2:2023

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SIST EN IEC 60071-2:2023


EUROPEAN STANDARD EN IEC 60071-2

NORME EUROPÉENNE

EUROPÄISCHE NORM June 2023
ICS 29.080.30 Supersedes EN IEC 60071-2:2018
English Version
Insulation co-ordination - Part 2: Application guidelines
(IEC 60071-2:2023)
Coordination de l'isolement - Partie 2: Lignes directrices en Isolationskoordination - Teil 2: Anwendungsrichtlinie
matière d'application (IEC 60071-2:2023)
(IEC 60071-2:2023)
This European Standard was approved by CENELEC on 2023-06-28. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard 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 CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 60071-2:2023 E

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SIST EN IEC 60071-2:2023
EN IEC 60071-2:2023 (E)
European foreword
The text of document 99/356/CDV, future edition 5 of IEC 60071-2, prepared by IEC/TC 99 "Insulation
co-ordination and system engineering of high voltage electrical power installations above 1,0 kV AC
and 1,5 kV DC" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 60071-2:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-03-28
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-06-28
document have to be withdrawn
This document supersedes EN IEC 60071-2:2018 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60071-2:2023 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60099-4:2014 NOTE Approved as EN 60099-4:2014 (not modified)
IEC 60099-5 NOTE Approved as EN IEC 60099-5
IEC 60099-8 NOTE Approved as EN IEC 60099-8
IEC 60507 NOTE Approved as EN 60507
IEC 62271-1:2017 NOTE Approved as EN 62271-1:2017 (not modified)
IEC 62271-100:2008 NOTE Approved as EN 62271-100:2009 (not modified)
IEC 60721-2-3:2013 NOTE Approved as EN 60721-2-3:2014 (not modified)
2

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SIST EN IEC 60071-2:2023
EN IEC 60071-2:2023 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their
...

SLOVENSKI STANDARD
oSIST prEN IEC 60071-2:2022
01-julij-2022
Koordinacija izolacije - 2. del: Smernice za uporabo (predlagan horizontalni
standard)
Insulation co-ordination - Part 2: Application guidelines (Proposed horizontal standard)
Coordination de l'isolement - Partie 2: Lignes directrices en matière d'application
Ta slovenski standard je istoveten z: prEN IEC 60071-2:2022
ICS:
29.080.01 Električna izolacija na Electrical insulation in
splošno general
oSIST prEN IEC 60071-2:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 60071-2:2022

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oSIST prEN IEC 60071-2:2022

99/356/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60071-2 ED5
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-05-06 2022-07-29
SUPERSEDES DOCUMENTS:
99/319/CD, 99/352/CC

IEC TC 99 : INSULATION CO-ORDINATION AND SYSTEM ENGINEERING OF HIGH VOLTAGE ELECTRICAL POWER INSTALLATIONS ABOVE 1,0
KV AC AND 1,5 KV DC
SECRETARIAT: SECRETARY:
Australia Ms Erandi Chandrasekare
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 8,TC 11,TC 14,TC 17,SC 17A,SC 17C,TC 20,TC
22,SC 22F,SC 22G,TC 33,TC 36,TC 37,TC 38,TC 42,TC
Other TC/SCs are requested to indicate their interest, if any, in
115,TC 122
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

TITLE:
Insulation co-ordination - Part 2: Application guidelines (Proposed horizontal standard)

PROPOSED STABILITY DATE: 2027

NOTE FROM TC/SC OFFICERS:


Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to 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.

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oSIST prEN IEC 60071-2:2022
IEC 60071-2/Ed5/CDV @ IEC (E) – 2 – 99/356/CDV
1 CONTENTS
2
3 FOREWORD . 9
4 1 Scope . 11
5 2 Normative references . 11
6 3 Terms, definitions, abbreviated terms and symbols . 12
7 3.1 Terms and definitions . 12
8 3.2 Abbreviated terms . 12
9 3.3 Symbols . 12
10 4 Concepts governing the insulation co-ordination . 17
11 5 Representative voltage stresses in service . 18
12 5.1 Origin and classification of voltage stresses . 18
13 5.2 Characteristics of overvoltage protection devices . 19
14 5.2.1 General remarks . 19
15 5.2.2 Metal-oxide surge arresters without gaps (MOSA) . 19
16 5.2.3 Line surge arresters (LSA) for overhead transmission and distribution
17 lines . 21
18 5.3 General approach for the determination of representative voltages and
19 overvoltages . 22
20 5.3.1 Continuous (power-frequency) voltage .
...