EN 61857-22:2008

Electrical insulation systems - Procedures for thermal evaluation - Part 22: Specific requirements for encapsulated-coil model - Wire-wound electrical insulation system (EIS)

IEC 61857-22:2008 provides a general-purpose procedure for the evaluation of wire-wound systems using a general purpose encapsulated-coil model (ECM) where the application is unknown. This second edition cancels and replaces the first edition published in 2002, and constitutes editorial revisions to make this standard compatible with Parts 1 and 21.

Elektrische Isoliersysteme - Verfahren zur thermischen Bewertung - Teil 22: Spezielle Bedingungen für ein umhülltes Spulenmodell - Elektrisches Isoliersystem (EIS) aus Drahtwicklungen

Systèmes d’isolation électriques - Procédures d’évaluation thermique - Partie 22: Exigences particulières pour modèle de bobine encapsulée - Système d’isolation électrique (SIE) à enroulements à fil

La CEI 61857-22:2008 indique une procédure d'usage général pour l'évaluation des systèmes d'enroulement à fil utilisant un modèle de bobine encapsulée (ECM: Encapsulated Coil Model) pour usage général lorsque l'application est inconnue. Cette deuxième édition annule et remplace la première édition publiée en 2002, et elle constitue une révision rédactionnelle pour rendre la présente norme compatible avec les Parties 1 et 21.

Elektroizolacijski sistemi - Postopki za ocenjevanje toplotnih lastnosti - 22. del: Specifične zahteve za model s tuljavico v okrovu - Žično oviti elektroizolacijski sistem (EIS) z navito žico (IEC 61857-22:2008)

General Information

• Status: Published
• Publication Date: 07-Oct-2008
• Withdrawal Date: 31-Aug-2011
• ICS: 29.080.30 - Insulation systems
• Technical Committee: CLC/SR 112 - Evaluation and qualification of electrical insulating materials and systems (to be defined)
• Drafting Committee: IEC/TC 112 - IEC_TC_112
• Parallel Committee: IEC/TC 112 - IEC_TC_112
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 08-Oct-2008
• Completion Date: 08-Oct-2008
• Ref Project: SIST EN 61857-22:2008 - Electrical insulation systems - Procedures for thermal evaluation - Part 22: Specific requirements for encapsulated-coil model - Wire-wound electrical insulation system (EIS) (IEC 61857-22:2008)

Relations

• Replaces: EN 61857-22:2002 - Electrical insulation systems - Procedures for thermal evaluation - Part 22: Specific requirements for encapsulated-coil model - Wire-wound electrical insulation system (EIS)
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2008
1DGRPHãþD
SIST EN 61857-22:2003
(OHNWURL]RODFLMVNLVLVWHPL3RVWRSNL]DRFHQMHYDQMHWRSORWQLKODVWQRVWLGHO
6SHFLILþQH]DKWHYH]DPRGHOVWXOMDYLFRYRNURYXäLþQRRYLWLHOHNWURL]RODFLMVNL
VLVWHP(,6]QDYLWRåLFR,(&
Electrical insulation systems - Procedures for thermal evaluation - Part 22: Specific
requirements for encapsulated-coil model - Wire-wound electrical insulation system (EIS)
(IEC 61857-22:2008)
Elektrische Isoliersysteme - Verfahren zur thermischen Bewertung - Teil 22: Spezielle
Bedingungen für ein umhülltes Spulenmodell - Elektrisches Isoliersystem aus
Drahtwicklungen (EIS) (IEC 61857-22:2008)
Systèmes d’isolation électriques - Procédures d’évaluation thermique - Partie 22:
Exigences particulières pour modèle de bobine encapsulée - Système d’isolation
électrique (SIE) à enroulements à fil (CEI 61857-22:2008)
Ta slovenski standard je istoveten z: EN 61857-22:2008
ICS:
29.080.30 Izolacijski sistemi Insulation systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61857-22
NORME EUROPÉENNE
October 2008
EUROPÄISCHE NORM
ICS 29.080.30 Supersedes EN 61857-22:2002

English version
Electrical insulation systems -
Procedures for thermal evaluation -
Part 22: Specific requirements for encapsulated-coil model -
Wire-wound electrical insulation system (EIS)
(IEC 61857-22:2008)
Systèmes d’isolation électriques -  Elektrische Isoliersysteme -
Procédures d’évaluation thermique - Verfahren zur thermischen Bewertung -
Partie 22: Exigences particulières Teil 22: Spezielle Bedingungen
pour modèle de bobine encapsulée - für ein umhülltes Spulenmodell -
Système d’isolation électrique (SIE) Elektrisches Isoliersystem (EIS)
à enroulements à fil aus Drahtwicklungen
(CEI 61857-22:2008) (IEC 61857-22:2008)

This European Standard was approved by CENELEC on 2008-09-01. 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 Central Secretariat 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 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: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61857-22:2008 E
Foreword
The text of document 112/91/CDV, future edition 2 of IEC 61857-22, prepared by IEC TC 112, Evaluation
and qualification of electrical insulating materials and systems, was submitted to the IEC-CENELEC
parallel vote and was approved by CENELEC as EN 61857-22 on 2008-09-01.
This European Standard supersedes EN 61857-22:2002.
The editorial revisions make EN 61857-22:2008 compatible with Parts 1 and 21.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2009-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61857-22:2008 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 61857-22:2008
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

IEC 61857-1 2004 Electrical insulation systems - Procedures for EN 61857-1 2005
thermal evaluation -
Part 1: General requirements - Low-voltage

IEC 61857-22
Edition 2.0 2008-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical insulation systems – Procedures for thermal evaluation –
Part 22: Specific requirements for encapsulated-coil model – Wire-wound
electrical insulation system (EIS)

Systèmes d’isolation électriques – Procédures d’évaluation thermique –
Partie 22: Exigences particulières pour modèle de bobine encapsulée – Système
d’isolation électrique (SIE) à enroulements à fil

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
M
CODE PRIX
ICS 29.080.30 ISBN 2-8318-9945-1
– 2 – 61857-22 © IEC:2008
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Construction .7
4.1 General information.7
4.2 ECM components .7
4.3 Assembly of the ECM .7
4.4 Similarity of reference and candidate ECM .8
5 Number of test objects.8
6 Test procedure .8
6.1 General .8
6.2 Initial screening test .8
6.2.1 General .8
6.2.2 Initial dielectric test .8
6.3 Thermal endurance test.9
6.3.1 Endurance test cycle .9
6.3.2 Thermal ageing .9
6.3.3 Mechanical stress.10
6.3.4 Thermal shock.10
6.3.5 Moisture exposure .10
6.3.6 Dielectric diagnostic test.10
7 End-of-life criterion.11
8 Analysing, reporting and classification.11
Annex A (informative) Similarity of reference and candidate specimens .12
Bibliography.13

Table 1 – Initial dielectric tests for ECM.9
Table 2 – Dielectric diagnostic tests for ECM .10

61857-22 © IEC:2008 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSULATION SYSTEMS –
PROCEDURES FOR THERMAL EVALUATION –

Part 22: Specific requirements for encapsulated-coil model –
Wire-wound electrical insulation system (EIS)

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
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
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agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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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.
International Standard IEC 61857-22 has been prepared by IEC technical committee 112:
Evaluation and qualification of electrical insulating materials and systems.
This second edition cancels and replaces the first edition published in 2002, and constitutes
editorial revisions to make this standard compatible with Parts 1 and 21.
The text of this standard is based on the following documents:
CDV Report on voting
112/91/CDV 112/99/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 61857-22 © IEC:2008
A list of all the parts in the IEC 61857 series, under the general title Electrical insulation
systems – Procedures for thermal evaluation, can be found on the IEC website.
The committee has decided that the contents of this 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.
61857-22 © IEC:2008 – 5 –
INTRODUCTION
...