SIST EN 61858-1:2014

SLOVENSKI STANDARD
SIST EN 61858-1:2014
01-september-2014
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SIST EN 61858:2008
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Electrical insulation systems - Thermal evaluation of modifications to an established EIS
- Part 1: Wire-wound winding EIS
Ta slovenski standard je istoveten z: EN 61858-1:2014
ICS:
29.080.30 Izolacijski sistemi Insulation systems
SIST EN 61858-1:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61858-1:2014

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SIST EN 61858-1:2014


EUROPEAN STANDARD EN 61858-1

NORME EUROPÉENNE

EUROPÄISCHE NORM
May 2014
ICS 29.080.30 Supersedes EN 61858:2008
English Version
Electrical insulation systems - Thermal evaluation of
modifications to an established electrical insulation system (EIS)
- Part 1: Wire-wound winding EIS
(IEC 61858-1:2014)
Systèmes d'isolation électrique - Évaluation thermique des Elektrische Isoliersysteme - Thermische Bewertung von
modifications apportées à un système d'isolation électrique Veränderungen an einem erprobten elektrischen
(SIE) éprouvé - Partie 1: Système d'isolation électrique à Isoliersystem (EIS) - Teil 1: EIS mit Runddraht-Wicklungen
enroulements à fils (IEC 61858-1:2014)
(CEI 61858-1:2014)
This European Standard was approved by CENELEC on 2014-03-19. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 61858-1:2014 E

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SIST EN 61858-1:2014
EN 61858-1:2014 - 2 -
Foreword
The text of document 112/252/CDV, future edition 1 of IEC 61858-1, prepared by IEC/TC 112
"Evaluation and qualification of electrical insulating materials and systems" was submitted to the
IEC-CENELEC parallel vote and approved by CENELEC as EN 61858-1:2014.

The following dates are fixed:
(dop) 2014-12-19
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2017-03-19
standards conflicting with the
document have to be withdrawn

This document supersedes EN 61858:2008.

EN 61858-1:2014 includes the following significant technical changes with respect to EN 61858:2008:
a) this part is specifically for wire-wound winding EIS;
b) new figures and charts support the contents.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.

Endorsement notice
The text of the International Standard IEC 61858-1:2014 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 standards indicated:

IEC 60034-18-21 NOTE Harmonized as EN 60034-18-21.
IEC 60317-15 NOTE Harmonized as EN 60317-15.

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SIST EN 61858-1:2014
- 3 - EN 61858-1:2014
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu

Publication Year Title EN/HD Year

IEC 60085 2007 Electrical insulation - Thermal evaluation EN 60085 -
and designation


IEC 60172 - Test procedure for the determination EN 60172 -
of the temperature index of enamelled
winding wires


IEC 60216-5 - Electrical insulating materials - Thermal EN 60216-5 -
endurance properties -
Part 5: Determination of relative thermal
endurance index (RTE) of an insulating
material


IEC 60317-1 - Specifications for particular types of winding - -
wires -
Part 1: Polyvinyl acetal enamelled round
copper wire, class 105


IEC 60317-2 - Specifications for particular types EN 60317-2 -
of winding wires -
Part 2: Solderable polyurethane enamelled
round copper wire, class 130, with a bonding
layer


IEC 60317-3 - Specifications for particular types of winding - -
wires -
Part 3: Polyester enamelled round copper
wire, class 155


IEC 60317-4 - Specifications for particular types of winding EN 60317-4 -
wires -
Part 4: Solderable polyurethane enamelled
round copper wire, class 130


IEC 60317-8 - Specifications for particular types of winding EN 60317-8 -
wires - Part 8: Polyesterimide enamelled
round copper wire, class 180


IEC 60317-12 - Specifications for particular types of winding EN 60317-12 -
wires -
Part 12: Polyvinyl acetal enamelled round
copper wire, class 120

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SIST EN 61858-1:2014
EN 61858-1:2014 - 4 -
Publication Year Title EN/HD Year
IEC 60317-13 - Specifications for particular types of winding EN 60317-13 -
wires -
Part 13: Polyester or polyesterimide
overcoated with polyamide-imide enamelled
round copper wire, class 200


1)
IEC 60317-19 - Specifications for particular types of winding EN 60317-19 -
wires -
Part 19: Solderable polyurethane enamelled
round copper wire overcoated with
polyamide, class 130


IEC 60317-20 - Specifications for particular types of winding EN 60317-20 -
wires -
Part 20: Solderable polyurethane enamelled
round copper wire, class 155


IEC 60317-21 - Specifications for particular types of winding EN 60317-21 -
wires -
Part 21: Solderable polyurethane enamelled
round copper wire overcoated with
polyamide, class 155


IEC 60317-22 - Specifications for particular types of winding EN 60317-22 -
wires -
Part 22 : Polyester or polyesterimide
enamelled round copper wire overcoated
with polyamide, class 180


IEC 60317-23 - Specifications for particular types of winding EN 60317-23 -
wires -
Part 23: Solderable polyesterimide
enamelled round copper wire, class 180


IEC 60317-25 - Specifications for particular types of winding EN 60317-25 -
wires -
Part 25: Polyester or polyesterimide
overcoated with polyamide-imide enamelled
round aluminium wire, class 200


IEC 60317-26 - Specifications for particular types of winding EN 60317-26 -
wires -
Part 26: Polyamide-imide enamelled round
copper wire, class 200


1) 1)
IEC 60317-34 - Specifications for particular types of winding EN 60317-34 -
wires -
Part 34: Polyester enamelled round copper
wire, class 130 L


IEC 60317-35 - Specifications for particular types of winding EN 60317-35 -
wires -
Part 35: Solderable polyurethane enamelled
round copper wire, class 155, with a bonding
layer


IEC 60317-36 - Specifications for particular types of winding EN 60317-36 -
wires -
Part 36: Solderable polyesterimide
enamelled round copper wire, class 180,
with a bonding layer



1)
Withdrawn publication.

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SIST EN 61858-1:2014
- 5 - EN 61858-1:2014
Publication Year Title EN/HD Year
IEC 60317-37 - Specifications for particular types of winding EN 60317-37 -
wires -
Part 37: Polyesterimide enamelled round
copper wire, class 180, with a bonding layer


IEC 60317-38 - Specifications for particular types EN 60317-38 -
of winding wires -
Part 38: Polyester or polyesterimide
overcoated with polyamide-imide enamelled
round copper wire, class 200, with a bonding
layer


IEC 60317-42 - Specifications for particular types EN 60317-42 -
of winding wires -
Part 42: Polyester-amide-imide enamelled
round copper wire, class 200


IEC 60317-43 - Specifications for particular types EN 60317-43 -
of winding wires -
Part 43: Aromatic polyimide tape wrapped
round copper wire, class 240


IEC 60317-46 - Specifications for particular types of winding EN 60317-46 -
wires -
Part 46: Aromatic polyimide enamelled round
copper wire, class 240


IEC 60317-48 - Specifications for particular types of winding EN 60317-48 -
wires -
Part 48: Glass-fibre wound resin or varnish
impregnated, bare or enamelled round
copper wire, temperature index 155


IEC 60317-50 - Specifications for particular types EN 60317-50 -
of winding wires -
Part 50: Glass-fibre wound silicone resin
or varnish impregnated, bare or enamelled
round copper wire, temperature index 200


IEC 60317-51 - Specifications for particular types EN 60317-51 -
of winding wires -
Part 51: Solderable polyurethane enamelled
round copper wire, class 180


IEC 60317-53 - Specifications for particular types EN 60317-53 -
of winding wires -
Part 53: Aromatic polyamide (aramid) tape
wrapped rectangular copper wire,
temperature index 220


1)
IEC 60317-54 - Specifications for particular types - -
of winding wires -
Part 54: Polyester enamelled round copper
wire, class 155L


IEC 60317-55 - Specifications for particular types EN 60317-55 -
of winding wires -
Part 55: Solderable polyurethane enamelled
round copper wire overcoated with
polyamide, Class 180



1)
Withdrawn publication.

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SIST EN 61858-1:2014
EN 61858-1:2014 - 6 -
Publication Year Title EN/HD Year
IEC 60317-57 - Specifications for particular types EN 60317-57 -
of winding wires -
Part 57: Polyamide-imide enamelled round
copper wire, class 220


IEC 60505 - Evaluation and qualification of electrical EN 60505 -
insulation systems


IEC 61033 - Test methods for the determination of bond EN 61033 -
strength of impregnating agents to an
enamelled wire substrate


IEC 61857 Series Electrical insulation systems - EN 61857 Series
Procedures for thermal evaluation


IEC 61857-1 2008 Electrical insulation systems - EN 61857-1 2009
Procedures for thermal evaluation -
Part 1: General requirements - Low-voltage


IEC 61857-21 - Electrical insulation systems - EN 61857-21 -
Procedures for thermal evaluation -
Part 21: Specific requirements for general-
purpose models - Wire-wound applications


IEC 62317-2 - Ferrite cores - Dimensions - EN 62317-2 -
Part 2: Pot-cores for use in
telecommunications, power supply, and filter
applications

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SIST EN 61858-1:2014




IEC 61858-1

®


Edition 1.0 2014-02




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Electrical insulation systems – Thermal evaluation of modifications to an

established electrical insulation system (EIS) –

Part 1: Wire-wound winding EIS




Systèmes d'isolation électrique – Évaluation thermique des modifications

apportées à un système d’isolation électrique (SIE) éprouvé –


Partie 1: Système d’isolation électrique à enroulements à fils













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE

PRICE CODE
INTERNATIONALE

CODE PRIX V


ICS 29.080.30 ISBN 978-2-8322-1410-7



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 61858-1:2014
– 2 – 61858-1 © IEC:2014
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 9
4 General considerations . 11
5 Substitution of phase or ground insulation . 13
5.1 Generically identical . 13
5.2 Substitution or addition of selected components and additives . 13
6 Substitution of winding wire . 14
6.1 Non bondable winding wire . 14
6.2 Bondable winding wire . 15
6.3 Substitution of conductor material . 16
7 Substitution of impregnating resin/varnish . 17
7.1 Thermal class determination . 17
7.2 Evaluation . 18
7.2.1 Thermal classes equal or better . 18
7.2.2 One thermal class lower . 18
7.2.3 Other criteria . 18
8 Substitution with other EIM . 18
8.1 Technically equivalent materials . 18
8.2 Previous evaluation . 18
8.3 Other . 18
9 Evaluation of additions . 19
9.1 Addition of an impregnating resin/varnish. 19
9.2 Addition of other components . 19
10 Chemical compatibility of a combination of materials . 20
10.1 General . 20
10.2 Construction . 20
10.2.1 Test apparatus . 20
10.2.2 Material specimens . 20
10.2.3 Contents of tube . 20
10.3 Test procedure. 21
10.3.1 Preparation of tubes . 21
10.3.2 Thermal conditioning . 21
10.3.3 Opening procedure . 21
10.3.4 Evaluation of samples . 22
11 Single-point thermal ageing test (procedure C) . 22
11.1 Test objects . 22
11.2 Establishing the EIS relative thermal endurance index (EIS RTE) . 22
11.3 Interpretation of results . 23
12 Full thermal aging test (procedure D) . 23
Annex A (normative) Classes of winding wire . 24
Annex B (informative) Visual representations of coils . 26
B.1 Form wound coils . 26

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SIST EN 61858-1:2014
61858-1 © IEC:2014 – 3 –
B.2 Precision-wound coil . 27
B.3 Random-wound coil . 28
Bibliography . 30

Figure 1 – Overview of evaluation methods . 12
Figure 2 – Substitution of phase and ground insulation . 13
Figure 3 – Substitution of non-bondable winding wire. 14
Figure 4 – Substitution of bondable winding wire . 15
Figure 5 – Substitution of conductor material . 16
Figure 6 – Substitution of impregnating resin/varnish . 17
Figure 7 – Additions of resins/varnishes and other components used in combination
with the EIMs evaluated in the EIS . 19
Figure B.1 – Form-wound coil comparison . 26
Figure B.2 – Form-wound coil comparison – Close-up . 26
Figure B.3 – Form-wound coil comparison – Different angle . 27
Figure B.4 – Form-wound coil detail . 27
Figure B.5 – Examples of precision-wound coils . 28
Figure B.6 – Example of precision-wound coil – Close-up . 28
Figure B.7 – Example of random-wound coil . 29
Figure B.8 – Example of random-wound coil – Close-up . 29

Table 1 – Thermal ageing test methods for resin/varnishes . 18
Table A.1 – Winding wire types – Round copper or aluminum conductor . 24

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SIST EN 61858-1:2014
– 4 – 61858-1 © IEC:2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ELECTRICAL INSULATION SYSTEMS –
THERMAL EVALUATION OF MODIFICATIONS TO
AN ESTABLISHED ELECTRICAL INSULATION SYSTEM (EIS) –

Part 1: Wire-wound winding 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,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
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
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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 61858-1 has been prepared by IEC technical committee 112:
Evaluation and qualification of electrical insulating materials and systems.
This first edition of IEC 61858-1 cancels and replaces the third edition of IEC 61858,
published in 2008. It constitutes a technical and editorial revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) this part is specifically for wire-wound winding EIS;
b) new figures and charts support the contents.

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SIST EN 61858-1:2014
61858-1 © IEC:2014 – 5 –
The text of this standard is based on the following documents:
CDV Report on voting
112/252/CDV 112/275/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.
A list of all parts in the IEC 61858 series, published under the general title Electrical
insulation systems – Thermal evaluation of modifications to an established electrical
insulation system (EIS), can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.

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SIST EN 61858-1:2014
– 6 – 61858-1 © IEC:2014
INTRODUCTION
This International Standard describes procedures for the evaluation of changes to an
established electrical insulation system (EIS) for wire-wound electro technical devices and the
effect of these changes on the thermal classification of the established EIS.
This Part 1 of IEC 61858 is for wire-wound winding EIS. Part 2 of IEC 61858 addresses
modifications of form-wound winding EIS.
General principles for evaluation and qualification of EIS can be found in IEC 60505. Unless
the procedures of this standard indicate otherwise, the principles of IEC 60505 should be
followed.
The thermal classification of an EIS is established either by known service life, in accordance
with IEC 60505, or evaluated in accordance with the IEC 61857 series.

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SIST EN 61858-1:2014
61858-1 © IEC:2014 – 7 –
ELECTRICAL INSULATION SYSTEMS –
THERMAL EVALUATION OF MODIFICATIONS TO
AN ESTABLISHED ELECTRICAL INSULATION SYSTEM (EIS) –

Part 1: Wire-wound winding EIS



1 Scope
This part of IEC 61858 lists the required test procedures for qualification of modifications of
an established electrical insulation system (EIS) with respect to its thermal classification. This
standard is applicable to EIS used in wire-wound winding electrotechnical devices. The test
procedures are comparative in that the performance of a candidate EIS is compared to that of
a reference EIS, which has proven service experience in accordance with IEC 60505 or has
been evaluated by one of the procedures given in the IEC 61857 series.
2 Normative references
Les documents suivants sont cités en référence de manière normative, en intégralité ou en
partie, dans le présent document et sont indispensables pour son application. Pour les
références datées, seule l’édition citée s’applique. Pour les références non datées, la
dernière édition du document de référence s’applique (y compris les éventuels amendements).
IEC 60085:2007, Electrical insulation – Thermal evaluation and designation
IEC 60172, Test procedure for the determination of the temperature index of enamelled
winding wires
IEC 60216-5, Electrical insulating materials – Thermal endurance properties – Part 5:
Determination of relative thermal endurance index (RTE) of an insulating material
IEC 60317-1, Specifications for particular types of winding wires – Part 1: Polyvinyl acetal
enamelled round copper wire, class 105
IEC 60317-2, Specifications for particular types of winding wires – Part 2: Solderable
polyurethane enamelled round copper wire, class 130, with a bonding layer
IEC 60317-3, Specifications for particular types of winding wires – Part 3: Polyester
enamelled round copper wire, class 155
IEC 60317-4, Specifications for particular types of winding wires – Part 4: Solderable
polyurethane enamelle
...