SIST EN IEC 61857-32:2020

Electrical insulation systems - Procedures for thermal evaluation - Part 32: Multifactor evaluation with increased factors during diagnostic testing (IEC 61857-32:2019)

EN-IEC 61857 series is focused on applications where other possible factors need to be incorporated to evaluate any influence on the performance of the electrical insulation system (EIS). Multi- factor evaluation is the most complex type of project to design and conduct. Clear guidelines are needed to give the user of this document a uniform approach and a method to analyse the test results. This document is for applications where the stresses are some combination of other factors of influence identified in IEC 60505. The multi-factor stresses are applied during the diagnostic portion of each test cycle. A few examples of other factors of influence or multi-factor stresses are: - high vibration; - submersion in oils, water, or solutions; - voltage higher than the test voltage of the reference EIS; - decreased cold shock temperature.

Elektrische Isoliersysteme - Verfahren zur thermischen Bewertung - Teil 32: Multifaktor-Bewertung mit erhöhten Faktoren während der diagnostischen Prüfung (IEC 61857-32:2019)

Systèmes d'isolation électrique - Procédures d'évaluation thermique - Partie 32: Évaluation multifactorielle avec facteurs augmentés pendant les essais de diagnostic (IEC 61857-32:2019)

L'IEC 61857-32:2019 concerne essentiellement les applications dans lesquelles il est nécessaire d'intégrer d'autres facteurs possibles pour évaluer l'impact sur les performances du système d'isolation électrique (SIE). L'évaluation multifactorielle est le type de projet le plus complexe à concevoir et réaliser. Des lignes directrices claires sont nécessaires pour proposer à l'utilisateur du présent document une approche uniforme et une méthode d'analyse des résultats d'essai.
Le présent document concerne les applications dans lesquelles les contraintes combinent d'autres facteurs d'influence identifiés dans l'IEC 60505. Les contraintes multifactorielles sont appliquées pendant la partie de chaque cycle d'essai relative au diagnostic.
Quelques exemples d'autres facteurs d'influence ou de contraintes multifactorielles sont:
– les fortes vibrations;
– l'immersion dans l'huile, l'eau ou des solutions;
– une tension supérieure à la tension d'essai du SIE de référence;
– une température de choc au froid diminuée.

Sistemi električne izolacije - Postopki za toplotno vrednotenje - 32. del: Večfaktorsko vrednotenje s povečanimi faktorji med diagnostičnim preskušanjem (IEC 61857-32:2019)

Skupina standardov EN-IEC 61857 se osredotoča na aplikacije, pri katerih je treba vključiti druge možne dejavnike za oceno morebitnega vpliva na delovanje sistema električne izolacije (EIS). Večfaktorsko vrednotenje je najbolj zapletena vrsta projektov za načrtovanje in izvedbo. Za zagotovitev enotnega pristopa in metode za analizo rezultatov preskusa so potrebne jasne smernice. Ta dokument je namenjen načinom uporabe, pri katerih so obremenitve kombinacija drugih dejavnikov vpliva, opredeljenih v standardu IEC 60505. Večfaktorske obremenitve se uporabljajo med diagnostičnimi deli posameznega cikla preskusa. Nekaj primerov drugih dejavnikov vpliva ali večfaktorskih obremenitev: – visoke vibracije; – potapljanje v olja, vodo ali raztopine; – napetost, višja od preskusne napetosti referenčnega sistema električne izolacije; – znižana temperatura hladnega šoka.

General Information

• Status: Published
• Publication Date: 14-Jan-2020
• ICS: 29.080.30 - Insulation systems
• Technical Committee: IIZS - Insulating materials and systems
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 30-Dec-2019
• Due Date: 05-Mar-2020
• Completion Date: 15-Jan-2020
• Ref Project: EN IEC 61857-32:2019 - Electrical insulation systems - Procedures for thermal evaluation - Part 32: Multifactor evaluation with increased factors during diagnostic testing

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61857-32:2020
01-marec-2020
Sistemi električne izolacije - Postopki za toplotno vrednotenje - 32. del:
Večfaktorsko vrednotenje s povečanimi faktorji med diagnostičnim preskušanjem
(IEC 61857-32:2019)
Electrical insulation systems - Procedures for thermal evaluation - Part 32: Multifactor
evaluation with increased factors during diagnostic testing (IEC 61857-32:2019)
Elektrische Isoliersysteme - Verfahren zur thermischen Bewertung - Teil 32: Multifaktor-
Bewertung mit erhöhten Faktoren während der diagnostischen Prüfung (IEC 61857-
32:2019)
Systèmes d'isolation électrique - Procédures d'évaluation thermique - Partie 32:
Évaluation multifactorielle avec facteurs augmentés pendant les essais de diagnostic
(IEC 61857-32:2019)
Ta slovenski standard je istoveten z: EN IEC 61857-32:2019
ICS:
29.080.30 Izolacijski sistemi Insulation systems
SIST EN IEC 61857-32:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61857-32:2020

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SIST EN IEC 61857-32:2020


EUROPEAN STANDARD EN IEC 61857-32

NORME EUROPÉENNE

EUROPÄISCHE NORM
December 2019
ICS 29.080.30

English Version
Electrical insulation systems - Procedures for thermal evaluation
- Part 32: Multifactor evaluation with increased factors during
diagnostic testing
(IEC 61857-32:2019)
Systèmes d'isolation électrique - Procédures d'évaluation Elektrische Isoliersysteme - Verfahren zur thermischen
thermique - Partie 32: Évaluation multifactorielle avec Bewertung - Teil 32: Multifaktor-Bewertung mit erhöhten
facteurs augmentés pendant les essais de diagnostic Faktoren während der diagnostischen Prüfung
(IEC 61857-32:2019) (IEC 61857-32:2019)
This European Standard was approved by CENELEC on 2019-11-18. 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,
Turkey 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61857-32:2019 E

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SIST EN IEC 61857-32:2020
EN IEC 61857-32:2019 (E)
European foreword
The text of document 112/399/CDV, future edition 1 of IEC 61857-32, 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 IEC 61857-32:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-08-18
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-11-18
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 shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 61857-32:2019 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 60505 NOTE Harmonized as EN 60505


2

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SIST EN IEC 61857-32:2020
EN IEC 61857-32:2019 (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 content
constitutes requirements 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 1  Where 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 61857-1 -  Electrical insulation systems - Procedures EN 61857-1 -
for thermal evaluation - Part 1: General
requirements - Low-voltage
IEC 61858-2 -  Electrical insulation systems - Thermal EN 61858-2 -
evaluation of modifications to an
established electrical insulation system
(EIS) - Part 2: Form-wound EIS
IEC/TR 61857-2 -  Electrical insulation systems - Procedures - -
for thermal evaluation - Part 2: Selection of
the appropriate test method for evaluation
and classification of electrical insulation
systems

3

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SIST EN IEC 61857-32:2020




IEC 61857-32

®


Edition 1.0 2019-10




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Electrical insulation systems – Procedures for thermal evaluation –

Part 32: Multifactor evaluation with increased factors during diagnostic testing




Systèmes d'isolation électrique – Procédures d'évaluation thermique –

Partie 32: Évaluation multifactorielle avec facteurs augmentés pendant

les essais de diagnostic















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.080.30 ISBN 978-2-8322-7463-7




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 IEC 61857-32:2020
– 2 – IEC 61857-32:2019 © IEC 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Procedure . 7
5 Test objects . 7
6 EIS evaluation . 7
7 Part 1: Baseline structure . 8
7.1 General . 8
7.2 Illustration of the structure – Thermal evaluation . 8
7.3 Example of thermal evaluation of a candidate EIS . 9
8 Part 2: Evaluation of other factors . 10
8.1 General . 10
8.2 Selection of the ageing temperature for the one-temperature comparison . 10
8.3 Application of increased or additional diagnostic factors . 11
9 Analysis of data . 11
9.1 General . 11
9.2 Evaluation of the other factors of influence . 11
9.3 Comparison of the results is between the baseline EIS and any of the sets of
results for other factors of influence . 11
10 Report . 12
Bibliography . 13
Annex A (informative)  Example of a test data sheet report . 14
Annex B (informative) Example of thermal ageing data for the reference EIS –
Establishing the correlation time . 15
Annex C (informative) Example of a test data sheet for a baseline candidate thermal
classification . 16
Annex D (informative) Establishing the thermal endurance of the baseline candidate
using the reference correlation time . 17

Figure 1 – Overview . 7
Figure 2 – Illustration of the establishment of the thermal classification of
the candidate EIS . 9
Figure B.1 – Reference data with the known temperature of 186 °C, time coordinate
established at 45 200 h . 15
Figure D.1 – Baseline candidate data with the known thermal index of 161 °C when the
time coordinate from the reference is 45 200 hours . 17

Table 1 – Example of a reference EIS and candidate EIS; performance at temperature
and thermal classification. 9
Table 2 – Example of ageing temperature selection for the one-temperature
comparison . 10
Table A.1 – Example of a test data sheet . 14
Table C.1 – Example of a test data sheet for a baseline candidate . 16

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SIST EN IEC 61857-32:2020
IEC 61857-32:2019 © IEC 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ELECTRICAL INSULATION SYSTEMS – PROCEDURES
FOR THERMAL EVALUATION –

Part 32: Multifactor evaluation with increased
factors during diagnostic testing

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 61857-32 has been prepared by IEC technical committee 112:
Evaluation and qualification of electrical insulating materials and systems
The text of this International Standard is based on the following documents:
CDV Report on voting
112/399/CDV 112/425A/RVC

Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

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SIST EN IEC 61857-32:2020
– 4 – IEC 61857-32:2019 © IEC 2019
A list of all parts in the IEC 61857 series, published 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 document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document 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 IEC 61857-32:2020
IEC 61857-32:2019 © IEC 2019 – 5 –
INTRODUCTION
Accelerated ageing of an Electrical Insulation System [EIS] is intended to evaluate the
thermal classification of the EIS. Many applications need to include the evaluation of other
factors in addition to the thermal factor related to the application.
IEC 60505 provides four categories of stresses or ageing factors which influence the
performance of products in use under a wide range of operating conditions. In IEC 60505, the
factors are presented as Thermal [T], Electrical [E], Environmental [E], and Mechanical [M]. In
this part of IEC 61857, Environmental [E] is replaced with Ambient [A] to remove possible
confusion of having two factors represented by the same letter. For this document, the factors
are presented with Thermal [T], Electrical [E], Ambient [A], and Mechanical [M].
This document provides the structure for evaluation of one or more of the three factors E, A
and M by direct comparison to the baseline classification established by T. Without the
baseline, any analysis is limited.
While similar, IEC 61857-32 and IEC 61857-33 have different structure and evaluation
conditions. In IEC 61857-32, thermal exposure is the only intended ageing factor and
additional stresses are only applied during the diagnostic portion of each test cycle. In
IEC 61857-33, the stresses are applied continually at elevated temperatures.

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SIST EN IEC 61857-32:2020
– 6 – IEC 61857-32:2019 © IEC 2019
ELECTRICAL INSULATION SYSTEMS – PROCEDURES
FOR THERMAL EVALUATION –

Part 32: Multifactor evaluation with increased
factors during diagnostic testing



1 Scope
This part of the 61857 series is focused on applications where other possible factors need to
be incorporated to evaluate any influence on the performance of the electrical insulation
system (EIS). Multi-factor evaluation is the most complex type of project to design and
conduct. Clear guidelines are needed to give the user of this document a uniform approach
and a method to analyse the test results.
This document is for applications where the stresses are some combination of other factors of
influence identified in IEC 60505. The multi-factor stresses are applied during the diagnostic
portion of each test cycle.
A few examples of other factors of influence or multi-factor stresses are:
– high vibration;
– submersion in oils, water, or solutions;
– voltage higher than the test voltage of the reference EIS;
– decrea
...