EN 61858-2:2014

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

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
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.

- 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
1)
Withdrawn publication.
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

1)
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
1)
Withdrawn publication.
- 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
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

– 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 .
...