Electrical insulation systems - Thermal evaluation of modifications to an established EIS- Part-2: Form-wound EIS

EN IEC 61858-2 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 form-wound 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 IEC 60085 and IEC 60034-18-31.

Elektrische Isoliersysteme - Thermische Bewertung von Veränderungen an einem erprobten elektrischen Isoliersystem (EIS) - Teil 2: EIS mit Flachdraht-Wicklungen

Systèmes d'isolation électrique - Évaluation thermique des modifications apportées à un système d’isolation électrique (SIE) éprouvé - Partie 2: Système d’isolation électrique à enroulements préformés

L'IEC 61858-2:2014 énumère les procédures d'essai requises pour la qualification des modifications qui ont été apportées à un système d'isolation électrique (SIE) éprouvé, pour ce qui concerne sa classification thermique. La présente norme s'applique aux SIE utilisés dans les dispositifs électrotechniques à enroulements préformés. Les procédures d'essai sont comparatives en ce qu'elles se font par comparaison des performances d'un SIE candidat avec celles d'un SIE de référence dont l'expérience en service a été démontrée conformément à l'IEC 60505, ou qui a été évalué par l'une des procédures décrites dans l'IEC 60085 et l'IEC 60034-18-31.

Sistemi električne izolacije - Toplotno vrednotenje sprememb preverjenega sistema električne izolacije z EIS - 2. del: Predhodno oblikovana navitja EIS (IEC 61858-2:2014)

Standard EN IEC 61858-2 navaja seznam zahtevanih preskusnih postopkov za kvalificiranje sprememb preverjenega sistema električne izolacije (EIS) z upoštevanjem njegove toplotne klasifikacije. Ta standard se uporablja za EIS, uporabljene v elektrotehničnih napravah s predhodno oblikovanimi navitji. Preskusni postopki so primerjalni do te mere, da se delovanje kandidatnega EIS primerja z delovanjem referenčnega EIS, ki ima dokazane izkušnje pri uporabi v skladu s standardom IEC 60505 ali je bil ovrednoten z enim od postopkov, določenih v standardih IEC 60085 in IEC 60034-18-31.

General Information

Status
Published
Publication Date
10-Jun-2014
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
03-Jun-2014
Due Date
08-Aug-2014
Completion Date
11-Jun-2014

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SLOVENSKI STANDARD
SIST EN 61858-2:2014
01-julij-2014
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Electrical insulation systems - Thermal evaluation of modifications to an established EIS-

Part-2: Form-wound EIS
Ta slovenski standard je istoveten z: EN 61858-2:2014
ICS:
29.080.30 Izolacijski sistemi Insulation systems
SIST EN 61858-2:2014 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61858-2:2014
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SIST EN 61858-2:2014
EUROPEAN STANDARD EN 61858-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2014
ICS 29.080.30
English Version
Electrical insulation systems - Thermal evaluation of
modifications to an established electrical insulation system (EIS)
- Part 2: Form-wound EIS
(IEC 61858-2:2014)

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 2: Système d'isolation électrique à Isoliersystem (EIS) - Teil 2: EIS mit Flachdraht-Wicklungen

enroulements préformés (IEC 61858-2:2014)
(CEI 61858-2:2014)

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 61858-2:2014 E
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SIST EN 61858-2:2014
EN 61858-2:2014 - 2 -
Foreword

The text of document 112/253/CDV, future edition 1 of IEC 61858-2, 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 61858-2:2014.
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

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 61858-2:2014 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following note has to be added for the standard indicated:

IEC 60172 NOTE Harmonized as EN 60172.
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SIST EN 61858-2:2014
- 3 - EN 61858-2:2014
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 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 60034-18-31 2012 Rotating electrical machines - EN 60034-18-31 2012
Part 18-31: Functional evaluation of
insulation systems - Test procedures for
form-wound windings - Thermal evaluation
and classification of insulation systems used
in rotating machines
IEC 60085 2007 Electrical insulation - Thermal evaluation EN 60085 2008
and designation
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 60216-6 - Electrical insulating materials - Thermal EN 60216-6 -
endurance properties -
Part 6: Determination of thermal endurance
indices (TI and RTE) of an insulating
material using the fixed time frame method
IEC 60317 Series Specifications for particular types EN 60317 Series
of winding wires
1) 1)
IEC 60317-16 - Specifications for particular types EN 60317-16 -
of winding wires -
Part 16: Polyester enamelled rectangular
copper wire, class 155
IEC 60317-17 - Specifications for particular types EN 60317-17 -
of winding wires -
Part 17: Polyvinyl acetal enamelled
rectangular copper wire, class 105
IEC 60317-18 - Specifications for particular types EN 60317-18 -
of winding wires -
Part 18 : Polyvinyl acetal enamelled
rectangular copper wire, class 120
IEC 60317-27 - Specifications for particular types EN 60317-27 -
of winding wires -
Part 27: Paper tape covered rectangular
copper wire
Withdrawn publication.
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SIST EN 61858-2:2014
EN 61858-2:2014 - 4 -
Publication Year Title EN/HD Year
IEC 60317-28 - Specifications for particular types EN 60317-28 -
of winding wires -
Part 28: Polyesterimide enamelled
rectangular copper wire, class 180
IEC 60317-29 - Specifications for particular types EN 60317-29 -
of winding wires -
Part 29: Polyester or polyesterimide
overcoated with polyamide-imide enamelled
rectangular copper wire, class 200
IEC 60317-30 - Specifications for particular types of winding EN 60317-30 -
wires -
Part 30: Polyimide enamelled rectangular
copper wire, class 220
IEC 60317-31 - Specifications for particular types EN 60317-31 -
of winding wires -
Part 31: Glass-fibre wound resin or varnish
impregnated, bare or enamelled rectangular
copper wire, temperature index 180
IEC 60317-32 - Specifications for particular types EN 60317-32 -
of winding wires -
Part 32: Glass-fibre wound, resin or varnish
impregnated, bare or enamelled rectangular
copper wire, temperature index 155
IEC 60317-33 - Specifications for particular types of winding EN 60317-33 -
wires -
Part 33: Glass-fibre wound, resin or varnish
impregnated, bare or enamelled rectangular
copper wire, temperature index 200
IEC 60317-39 - Specifications for particular types EN 60317-39 -
of winding wires -
Part 39: Glass-fibre braided resin or varnish
impregnated, bare or enamelled rectangular
copper wire, temperature index 180
IEC 60317-40 - Specifications for particular types EN 60317-40 -
of winding wires -
Part 40: Glass-fibre braided resin or varnish
impregnated, bare or enamelled rectangular
copper wire, temperature index 200
IEC 60317-44 - Specifications for particular types EN 60317-44 -
of winding wires -
Part 44: Aromatic polyimide tape wrapped
rectangular copper wire, class 240
IEC 60317-47 - Specifications for particular types EN 60317-47 -
of winding wires -
Part 47: Aromatic polyimide enamelled
rectangular copper wire, class 240
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
Withdrawn publication.
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SIST EN 61858-2:2014
- 5 - EN 61858-2:2014
Publication Year Title EN/HD Year
IEC 60317-58 - Specifications for particular types EN 60317-58 -
of winding wires -
Part 58: Polyamide-imide enamelled
rectangular copper wire, class 220
IEC 60505 - Evaluation and qualification of electrical EN 60505 -
insulation systems
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SIST EN 61858-2:2014
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SIST EN 61858-2:2014
IEC 61858-2
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 2: Form-wound EIS
Systèmes d'isolation électrique – Évaluation thermique des modifications
apportées à un système d’isolation électrique (SIE) éprouvé –
Partie 2: Système d’isolation électrique à enroulements préformés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX T
ICS 29.080.30 ISBN 978-2-8322-1394-0

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 61858-2:2014
– 2 – 61858-2 © IEC:2014
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 7

4 General considerations .................................................................................................... 9

5 Substitution of phase insulation and/or ground insulation ............................................... 11

5.1 Generically identical ............................................................................................. 11

5.2 Substitution or addition of selected components and additives .............................. 11

5.3 Reduction of thickness .......................................................................................... 11

6 Substitution of winding wire ........................................................................................... 12

6.1 Winding wire ......................................................................................................... 12

6.2 Substitution of conductor material ......................................................................... 13

6.3 Alternate winding wire ........................................................................................... 13

7 Substitution of impregnating resin/varnish ..................................................................... 13

8 Evaluation of additions .................................................................................................. 13

9 Procedure C – Single-point thermal ageing test ............................................................. 13

9.1 Test objects .......................................................................................................... 13

9.2 Establishing the EIS relative thermal endurance index (EIS RTE) ......................... 13

9.3 Interpretation of results ......................................................................................... 14

10 Full thermal aging test (procedure D) ............................................................................. 14

Annex A (normative) Classes of winding wire ....................................................................... 15

Annex B (informative) Visual representation of form-wound coil manufacturing process ....... 16

Bibliography .......................................................................................................................... 22

Figure 1 – Overview of evaluation methods ........................................................................... 10

Figure 2 – Substitution of phase and ground insulation ......................................................... 11

Figure 3 – Substitution of winding wire .................................................................................. 12

Figure 4 – Substitution of conductor material ........................................................................ 12

Figure B.1 – Rectangular winding wire shaped into un-formed coil on coil forming

machine ................................................................................................................................ 16

Figure B.2 – Un-formed coil being wrapped with a protective fabric ...................................... 17

Figure B.3 – Un-formed coil completely wrapped with protective fabric ................................. 17

Figure B.4 – Coil forming machine stretches and bends oval coil to formed shape coil

in the shaping apparatus ....................................................................................................... 18

Figure B.5 – Formed coil with protective layer removed ........................................................ 18

Figure B.6 – Close-up of formed coil’s knuckle insulation ...................................................... 19

Figure B.7 – Formed coil with multiple layers of insulation .................................................... 19

Figure B.8 – Formed coils placed into the form-wound test specimen or Formette ................ 20

Figure B.9 – Insulation details ............................................................................................... 21

Table A.1 – Winding wire type – Rectangular conductor ........................................................ 15

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SIST EN 61858-2:2014
61858-2 © IEC:2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSULATION SYSTEMS –
THERMAL EVALUATION OF MODIFICATIONS TO
AN ESTABLISHED ELECTRICAL INSULATION SYSTEM (EIS) –
Part-2: Form-wound 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 61858-2 has been prepared by IEC technical committee 112:

Evaluation and qualification of electrical insulating materials and systems.
The text of this standard is based on the following documents:
CDV Report on voting
112/253/CDV 112/274/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.

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SIST EN 61858-2:2014
– 4 – 61858-2 © IEC:2014

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 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 61858-2:2014
61858-2 © IEC:2014 – 5 –
INTRODUCTION

This International Standard describes procedures for the evaluation of changes to an

established electrical insulation system (EIS) for form-wound electro technical devices and

the effect of these changes on the thermal classification of the established EIS.

This Part 2 of IEC 61858 is for form-wound EIS. Part 1 of IEC 61858 addresses modifications

of wire-wound 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.
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SIST EN 61858-2:
...

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