High-voltage fuses - Part 4: Additional testing requirements for high-voltage expulsion fuses utilizing polymeric insulators (IEC 60282-4:2020)

This part of IEC 60282 applies to expulsion fuses complying with IEC 60282-2 and specifies
additional testing requirements for fuses employing a cutout fuse-base that utilizes polymeric
insulators.

Hochspannungssicherungen - Teil 4: Zusätzliche Prüfanforderungen an Hochspannungs-Ausblassicherungen mit Polymerisolatoren (IEC 60282-4:2020)

Fusibles à haute tension - Partie 4: Exigences d'essai supplémentaires pour les fusibles à expulsion à haute tension utilisant des isolateurs polymériques (IEC 60282-4:2020)

IEC 60282-4:2020 s'applique aux fusibles à expulsion conformes à l'IEC 60282.­2 et spécifie les exigences d'essai supplémentaires pour les fusibles qui comprennent un socle de déconnecteur à isolateurs polymériques.

Visokonapetostne varovalke - 4. del: Dodatne zahteve za preskušanje visokonapetostnih izklopnih varovalk s polimernimi izolatorji (IEC 60282-4:2020)

General Information

Status
Published
Public Enquiry End Date
30-Dec-2018
Publication Date
10-Nov-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Jun-2020
Due Date
09-Aug-2020
Completion Date
11-Nov-2020

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SLOVENSKI STANDARD
SIST EN IEC 60282-4:2020
01-december-2020
Visokonapetostne varovalke - 4. del: Dodatne zahteve za preskušanje
visokonapetostnih izklopnih varovalk s polimernimi izolatorji (IEC 60282-4:2020)

High-voltage fuses - Part 4: Additional testing requirements for high-voltage expulsion

fuses utilizing polymeric insulators (IEC 60282-4:2020)

Hochspannungssicherungen - Teil 4: Zusätzliche Prüfanforderungen an Hochspannungs-

Ausblassicherungen mit Polymerisolatoren (IEC 60282-4:2020)

Fusibles à haute tension - Partie 4: Exigences d'essai supplémentaires pour les fusibles

à expulsion à haute tension utilisant des isolateurs polymériques (IEC 60282-4:2020)

Ta slovenski standard je istoveten z: EN IEC 60282-4:2020
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
SIST EN IEC 60282-4:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN IEC 60282-4:2020
---------------------- Page: 2 ----------------------
SIST EN IEC 60282-4:2020
EUROPEAN STANDARD EN IEC 60282-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 29.120.50
English Version
High-voltage fuses - Part 4: Additional testing requirements for
high-voltage expulsion fuses utilizing polymeric insulators
(IEC 60282-4:2020)

Fusibles à haute tension - Partie 4: Exigences d'essai Hochspannungssicherungen - Teil 4: Zusätzliche

supplémentaires pour les fusibles à expulsion à haute Prüfanforderungen an Hochspannungs-Ausblassicherungen

tension utilisant des isolateurs polymériques mit Polymerisolatoren
(IEC 60282-4:2020) (IEC 60282-4:2020)

This European Standard was approved by CENELEC on 2020-05-21. 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

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60282-4:2020 E
---------------------- Page: 3 ----------------------
SIST EN IEC 60282-4:2020
EN IEC 60282-4:2020 (E)
European foreword

The text of document 32A/346/FDIS, future edition 1 of IEC 60282-4, prepared by SC 32A "High-

voltage fuses" of IEC/TC 32 "Fuses" was submitted to the IEC-CENELEC parallel vote and approved

by CENELEC as EN IEC 60282-4:2020.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-02-21

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2023-05-21

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 60282-4:2020 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 62217:2012 NOTE Harmonized as EN 62217:2013 (not modified)
---------------------- Page: 4 ----------------------
SIST EN IEC 60282-4:2020
EN IEC 60282-4:2020 (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 60060-1 2010 High-voltage test techniques - Part 1: EN 60060-1 2010
General definitions and test requirements
IEC 60282-2 2008 High-voltage fuses - Part 2: Expulsion fuses - -
ISO 4287 - Geometrical Product Specifications (GPS) - EN ISO 4287 -
Surface texture: Profile method - Terms,
definitions and surface texture parameters
ISO 4892-2 - Plastics - Methods of exposure to laboratory EN ISO 4892-2 -
light sources - Part 2: Xenon-arc lamps
ISO 868 - Plastics and ebonite - Determination of EN ISO 868 -
indentation hardness by means of a
durometer (Shore hardness)
---------------------- Page: 5 ----------------------
SIST EN IEC 60282-4:2020
---------------------- Page: 6 ----------------------
SIST EN IEC 60282-4:2020
IEC 60282-4
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
High-voltage fuses –

Part 4: Additional testing requirements for high-voltage expulsion fuses utilizing

polymeric insulators
Fusibles à haute tension –
Partie 4: Exigences d'essai supplémentaires pour les fusibles à expulsion à
haute tension utilisant des isolateurs polymériques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-8089-8

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
---------------------- Page: 7 ----------------------
SIST EN IEC 60282-4:2020
– 2 – IEC 60282-4:2020 © IEC 2020
CONTENTS

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

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

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

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

3 Terms and definitions ...................................................................................................... 6

4 Type tests ....................................................................................................................... 8

4.1 General requirements ............................................................................................. 8

4.2 Mechanical tests ..................................................................................................... 8

4.2.1 Mechanical stressing at temperature extremes ................................................ 8

4.2.2 Long term deformation/creep testing .............................................................. 10

4.3 Environmental tests .............................................................................................. 11

4.3.1 General ......................................................................................................... 11

4.3.2 Accelerated weathering test ........................................................................... 11

4.3.3 Tracking and erosion test .............................................................................. 12

4.3.4 Flammability test ........................................................................................... 13

4.4 Tests on interfaces and connections of end fittings ............................................... 13

4.4.1 General ......................................................................................................... 13

4.4.2 Water immersion pre-stressing procedure ...................................................... 14

4.4.3 Verification tests ............................................................................................ 14

4.5 Breaking tests with dye penetration....................................................................... 15

4.5.1 General ......................................................................................................... 15

4.5.2 Description of tests to be made ..................................................................... 15

4.6 Acceptance criteria ............................................................................................... 15

Bibliography .......................................................................................................................... 16

Figure 1 – Test sequence ....................................................................................................... 9

Figure 2 – Dye penetration test arrangement ........................................................................ 10

Figure 3 – Tracking wheel test arrangement ......................................................................... 13

---------------------- Page: 8 ----------------------
SIST EN IEC 60282-4:2020
IEC 60282-4:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HIGH-VOLTAGE FUSES –
Part 4: Additional testing requirements for high-voltage
expulsion fuses utilizing polymeric insulators
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 60282-4 has been prepared by subcommittee 32A: High-voltage

fuses, of IEC technical committee 32: Fuses.
The text of this International Standard is based on the following documents:
FDIS Report on voting
32A/346/FDIS 32A/348/RVD

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.

---------------------- Page: 9 ----------------------
SIST EN IEC 60282-4:2020
– 4 – IEC 60282-4:2020 © IEC 2020

A list of all parts in the IEC 60282 series, published under the general title High-voltage fuses,

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.
---------------------- Page: 10 ----------------------
SIST EN IEC 60282-4:2020
IEC 60282-4:2020 © IEC 2020 – 5 –
INTRODUCTION

High-voltage expulsion fuses are tested according to IEC 60282-2 which recognizes that fuse-

bases may use polymer (non-ceramic) insulators. However, very little additional testing is

specified for fuses using such insulators. In the case of polymer post insulators and

suspension insulators, only artificial pollution tests are required in accordance with IEC 61592

and IEC 61109, respectively. However, for fuses that use insulators not covered by these

International Standards, such as certain fuse-cutouts, the additional testing required is by

agreement between manufacturer and user. Fuses that need such "additional testing" are

expulsion fuses that utilize polymer insulators in which a single mounting bracket is used,

either at the centre of an insulator or connected to two insulators (a "cutout fuse-base"). As

the market for expulsion fuses using polymer insulators has grown, manufacturers have

introduced many tests in addition to artificial pollution tests, covering other aspects of a fuse's

performance. This document formalises such testing and provides standardisation and

consistency. It should be noted that the document focusses on product testing as opposed to

material testing. In addition to drawing on test procedures covered by IEC 62217:2012,

Polymeric HV insulators for indoor and outdoor use – General definitions, test methods and

acceptance criteria, material from IEEE Std C37.41™:2016 (primarily 18.1.2 Long-term

deformation/creep testing) is also used, with the permission of IEEE.
---------------------- Page: 11 ----------------------
SIST EN IEC 60282-4:2020
– 6 – IEC 60282-4:2020 © IEC 2020
HIGH-VOLTAGE FUSES –
Part 4: Additional testing requirements for high-voltage
expulsion fuses utilizing polymeric insulators
1 Scope

This part of IEC 60282 applies to expulsion fuses complying with IEC 60282-2 and specifies

additional testing requirements for fuses employing a cutout fuse-base that utilizes polymeric

insulators.
2 Normative references

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.

IEC 60060-1:2010, High-voltage test techniques – Part 1: General definitions and test

requirements
IEC 60282-2:2008, High-voltage fuses – Part 2: Expulsion fuses

ISO 4287, Geometrical Product Specifications (GPS) – Surface Texture: Profile method –

Terms, definitions and surface texture parameters

ISO 4892-2, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-arc

lamps

ISO 868, Plastics and ebonite – Determination of indentation hardness by means of a

durometer (Shore hardness)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
polymeric insulator
insulator whose insulating body consists of at least one organic based material
Note 1 to entry: Polymeric insulators are also known as non-ceramic insulators.

Note 2 to entry: Coupling devices may be attached to the ends of the insulating body.

[SOURCE: IEC 60050-471:2007, 471-01-13]
---------------------- Page: 12 ----------------------
SIST EN IEC 60282-4:2020
IEC 60282-4:2020 © IEC 2020 – 7 –
3.2
composite polymeric insulator

polymeric insulator made of at least two polymeric insulating parts, namely a core and a

housing equipped with end fittings

[SOURCE: IEC 60050-471:2007, 471-01-02, modified – the term "polymeric" added and the

note to entry deleted.]
3.3
core (of a composite polymeric insulator)

central insulating part of a composite polymeric insulator which provides the primary

mechanical characteristics of the insulator

[SOURCE: IEC 60050-471:2007, 471-01-03, modified – addition of "composite polymeric";

addition of "primary" and "of the insulator"; note to entry deleted.]
3.4
housing

external insulating part(s) of a composite polymeric insulator that provides the necessary

creepage distance, other dielectric characteristics of the insulator, and protects the core from

the environment

[SOURCE: IEC 60050-471:2007, 471-01-09, modified – "of a composite polymeric insulator"

and "other dielectric characteristics of the insulator" added.]
3.5
insulating body
insulating assembly that contains the insulator and permanent fittings
3.6
insulator trunk
central insulating part of an insulator from which the sheds project
Note 1 to entry: Also known as shank on smaller insulators.
[SOURCE: IEC 60050-471:2007, 471-01-11]
3.7
shed (of an insulator)

insulating part, projecting from the insulator trunk, intended to increase the creepage distance

Note 1 to entry: The shed can be with or without ribs.
[SOURCE: IEC 60050-471:2007, 471-01-15]
3.8
cutout fuse-base

fuse-base that uses an insulator or insulators having a single point mounting bracket

Note 1 to entry: The mounting bracket is generally located centrally between the terminals that are mounted at

the outer ends of the insulator(s).
3.9
resin insulator

polymeric insulator whose insulating body consists of a solid shank and sheds protruding from

the shank made from only one organic based housing material (e.g. cycloaliphatic epoxy)

---------------------- Page: 13 ----------------------
SIST EN IEC 60282-4:2020
– 8 – IEC 60282-4:2020 © IEC 2020
3.10
interface
surface between the different materials

Note 1 to entry: Various interfaces occur in most composite insulators, for example:

– between housing an
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Dodatne zahteve za preskušanje visokonapetostnih izklopnih varovalk s polimernimi izolatorjiAdditional testing requirements for high-voltage expulsion fuses utilizing polymeric insulators29.120.50Fuses and other overcurrent protection devicesICS:Ta slovenski standard je istoveten z:prEN IEC 60282-4:2018oSIST prEN IEC 60282-4:2018en,fr,de01-december-2018oSIST prEN IEC 60282-4:2018SLOVENSKI

STANDARD
oSIST prEN IEC 60282-4:2018
32A/342/CDV COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER: IEC 60282-4 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING: 2018-10-26 2019-01-18
SUPERSEDES DOCUMENTS: 32A/333/CD,32A/337/CC

IEC SC 32A : HIGH-VOLTAGE FUSES SECRETARIAT: SECRETARY: France Mr Raphaël Buisson OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD: TC 36

Other TC/SCs are requested to indicate their interest, if any, in this CDV to the secretary. FUNCTIONS CONCERNED:

EMC
ENVIRONMENT
QUALITY ASSURANCE
SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING Attention IEC-CENELEC parallel voting

The attention of IEC National Committees, members of CENELEC, is drawn to the fact that this Committee Draft for Vote (CDV) is submitted for parallel voting.

The CENELEC members are invited to vote through the CENELEC online voting system.

NOT SUBMITTED FOR CENELEC PARALLEL VOTING

This document is still under study and subject to change. It should not be used for reference purposes. Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation.

TITLE: Additional testing requirements for high-voltage expulsion fuses utilizing polymeric insulators

PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:

Copyright © 2018 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without permission in writing from IEC.

oSIST prEN IEC 60282-4:2018

IEC CDV 60282-4/ED1  IEC:2018 – 2 – 32A/342/CDV CONTENTS 1 FOREWORD .......................................................................................................................... 3 2 INTRODUCTION .................................................................................................................... 5 3 1 Scope ............................................................................................................................. 6 4 2 Normative references ...................................................................................................... 6 5 3 Terms and definitions ...................................................................................................... 6 6 4 Type tests ....................................................................................................................... 7 7 4.1 General requirements ............................................................................................. 7 8 4.2 Mechanical tests .................................................................................................... 7 9 4.2.1 Mechanical stressing at temperature extremes ................................................ 7 10 4.2.2 Long term deformation/creep testing ............................................................. 10 11 4.3 Environmental tests .............................................................................................. 10 12 4.3.1 General ......................................................................................................... 10 13 4.3.2 Accelerated weathering test .......................................................................... 10 14 4.3.3 Tracking and erosion test .............................................................................. 11 15 4.3.4 Flammability test ........................................................................................... 13 16 4.4 Tests on interfaces and connections of end fittings .............................................. 13 17 4.4.1 General ......................................................................................................... 13 18 4.4.2 Water immersion pre-stressing procedure ..................................................... 13 19 4.4.3 Verification Tests .......................................................................................... 13 20 4.5 Breaking tests with dye penetration ...................................................................... 14 21 4.5.1 General ......................................................................................................... 14 22 4.5.2 Description of tests to be made ..................................................................... 14 23 4.6 Acceptance criteria ............................................................................................... 14 24 Bibliography ......................................................................................................................... 15 25

26 Figure 1 – Test sequence ....................................................................................................... 8 27 Figure 2 – Dye penetration test arrangement .......................................................................... 9 28 Figure 3 – Tracking wheel test arrangement ......................................................................... 12 29

32 33 oSIST prEN IEC 60282-4:2018

IEC CDV 60282-4/ED1  IEC:2018 – 3 – 32A/342/CDV INTERNATIONAL ELECTROTECHNICAL COMMISSION 34 ____________ 35

36 ADDITIONAL TESTING REQUIREMENTS FOR HIGH-VOLTAGE EXPULSION 37 FUSES UTILIZING POLYMERIC INSULATORS

40 FOREWORD 41 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all 42 national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-43 operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to 44 other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available 45 Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical 46 committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. 47 International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. 48 IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions 49 determined by agreement between the two organizations. 50 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international 51 consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC 52 National Committees.

53 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees 54 in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, 55 IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 56 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently 57 to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication 58 and the corresponding national or regional publication shall be clearly indicated in the latter. 59 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment 60 services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by 61 independent certification bodies. 62 6) All users should ensure that they have the latest edition of this publication. 63 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of 64 its technical committees and IEC National Committees for any personal injury, property damage or other damage of any 65 nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the 66 publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.

67 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is 68 indispensable for the correct application of this publication. 69 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. 70 IEC shall not be held responsible for identifying any or all such patent rights. 71 International Standard IEC 60282-4 has been prepared by subcommittee SC32A: High-voltage fuses, 72 of IEC technical committee TC32: Fuses. 73 The text of this International Standard is based on the following documents: 74 FDIS Report on voting 32A/XX/FDIS 32A/XX/RVD

75 Full information on the voting for the approval of this International Standard can be found in the report 76 on voting indicated in the above table. 77 This document has been drafted in accordance with the ISO/IEC Directives, Part 2. 78 Acknowledgments: 79 The Working Group thanks the Institute of Electrical and Electronics Engineers, Incorporated, (IEEE) for 80 permission to reproduce information from its global Standards IEEE C37.41-2016. All such extracts are 81 copyright of IEEE, Piscataway, New Jersey. All rights reserved. Further information on the IEEE is available 82 from www.standards.ieee.org. IEEE has no responsibility for the placement and context in which the extracts 83 oSIST prEN IEC 60282-4:2018

IEC CDV 60282-4/ED1  IEC:2018 – 4 – 32A/342/CDV and contents are reproduced by the author, nor is IEEE in any way responsible for the other content or 84 accuracy therein. Note that any comments or interpretations of the Material are those of the author, and do not 85 represent the views of IEEE, its members or affiliates. 86 The committee has decided that the contents of this document will remain unchanged until the stability 87 date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific 88 document. At this date, the document will be

89 • reconfirmed, 90 • withdrawn, 91 • replaced by a revised edition, or 92 • amended. 93

95 oSIST prEN IEC 60282-4:2018

IEC CDV 60282-4/ED1  IEC:2018 – 5 – 32A/342/CDV INTRODUCTION 96 High-voltage expulsion fuses are tested to IEC 60282-2 which recognizes that fuse-bases may use 97 polymer (non-ceramic) insulators. However, very little additional testing is specified for fuses using 98 such insulators.

In the case of polymer post insulators and suspension insulators, only artificial 99 pollution tests are required according to IEC 61592 and IEC 61109, respectively. However, for fuses 100 that use insulators not covered by these standards, such as certain fuse-cutouts, the additional testing 101 required is to be by agreement between manufacturer and user. Fuses that need such “additional 102 testing” are expulsion fuses that utilize polymer insulators in which a single mounting bracket is used, 103 either at the centre of an insulator or connected to two insulators (a “cutout fuse-base”). As the market 104 for expulsion fuses using polymer insulators has grown, manufacturers have introduced many tests in 105 addition to artificial pollution tests, covering other aspects of a fuse’s performance. This standard 106 formalises such testing and provides standardisation and consistency. It should be noted that the 107 document focusses on product testing as opposed to material testing. In addition to drawing on test 108 procedures covered by IEC 62217:2012, “Polymeric HV insulators for indoor and outdoor use - 109 General definitions, test methods and acceptance criteria”, material from IEEE Std C37.41:2016 110 (primarily 18.1.2 “Long-term deformation/creep testing”) is also used, by permission from IEEE. 111 oSIST prEN IEC 60282-4:2018

IEC CDV 60282-4/ED1  IEC:2018 – 6 – 32A/342/CDV ADDITIONAL TESTING REQUIREMENTS FOR HIGH-VOLTAGE EXPULSION 112 FUSES UTILIZING POLYMERIC INSULATORS 113

114

115 1 Scope 116 This part of IEC 60282 applies to expulsion fuses complying with IEC 60282-2 and specifies additional 117 testing requirements for fuses employing a cutout fuse-base that utilizes polymeric insulators.

118 2 Normative references 119 The following documents are referred to in the text in such a way that some or all of their content 120 constitutes requirements of this document. For dated references, only the edition cited applies. For 121 undated references, the latest edition of the referenced document (including any amendments) applies. 122 IEC 60060-1:2010, High-voltage test techniques – Part 1: General definitions and test requirements 123 IEC 60282-2:2008, High-voltage fuses - Part 2: Expulsion fuses 124 IEC 62217:2012, Polymeric HV insulators for indoor and outdoor use - General definitions, test 125 methods and acceptance criteria 126 ISO 4287, Geometrical Product Specifications (GPS) – Surface Texture: Profile method – Terms, 127 definitions and surface texture parameters 128 ISO 4892-2, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-arc sources 129 ISO 868:2003, Plastics and ebonite – Determination of indentation hardness by means of a durometer 130 (Shore hardness) 131 3 Terms and definitions 132 For the purposes of this document, the following terms and definitions apply. 133 ISO and IEC maintain terminological databases for use in standardization at the following addresses:

134 • IEC Electropedia: available at http://www.electropedia.org/ 135 • ISO Online browsing platform: available at http://www.iso.org/obp 136 3.1

137 polymeric Insulator 138 insulator whose insulating body consists of at least one organic based material 139 Note 1 to entry: Polymeric insulators are also known as non-ceramic insulators. 140 Note 2 to entry: Coupling devices may be attached to the ends of the insulating body. 141 [SOURCE: IEC 60050-471:2007, 471-01-13] 142 3.2

143 composite polymeric insulator

144 polymeric insulator consisting of at least two separate polymeric insulating parts, namely a core and a 145 housing, equipped with end fittings 146 [SOURCE: IEC 60050-471:2007, 471-01-02, modified to include the term “polymeric"] 147 3.3

148 core (of a composite polymeric insulator)

149 central insulating part of a composite polymeric insulator that provides the primary 150 mechanical/strength characteristics of the insulator 151 oSIST prEN IEC 60282-4:2018

IEC CDV 60282-4/ED1  IEC:2018 – 7 – 32A/342/CDV [SOURCE: IEC 60050-471:2007, 471-01-03 modified: addition of “composite polymeric”; addition of 152 “primary”, “strength” and “of the insulator”; note deleted] 153 3.4

154 housing (of a composite polymeric insulator) 155 external insulating part(s) of a composite insulator that provides the necessary leakage distance, 156 other dielectric characteristics of the insulator, and protects the core from the environment 157 [SOURCE: IEC 60050-471:2007, 471-01-09, modified] 158 3.5

159 insulator body 160 insulating assembly that contains the insulator and permanent fittings 161 3.6

162 insulator trunk 163 central insulating part of an insulator from which the sheds project 164 Note 1 to entry: Also known as shank on smaller insulators. 165 [SOURCE: IEC 60050-471:2007, 471-01-11] 166 3.7

167 Shed (of an insulator) 168 insulating part, projecting from the insulator trunk, intended to increase the creepage distance 169 Note 1 to entry: The shed can be with or without ribs. 170 [SOURCE: IEC 60050-471:2007, 471-01-15] 171 3.8

172 cutout fuse-base 173 fuse-base that uses an insulator or insulators having a single point mounting bracket, generally 174 located centrally between the terminals that are mounted at the outer ends of the insulator(s)

175 3.9
176 Resin insulator

177 polymeric insulator whose insulating body is made from only one insulating part and which is equipped 178 with end fittings 179 polymeric insulator whose insulating body consists of a solid shank and sheds protruding from the 180 shank made from only one organic based housing material (e.g. cycloaliphatic epoxy) 181

182 4 Type tests 183 4.1 General requirements 184 Fuses according to this standard shall comply with the requirements of IEC 60282-2, except for those 185 that are specifically replaced with requirements specified in this standard for the following type tests. 186 4.2 Mechanical tests

187 4.2.1 Mechanical stressing at temperature extremes

188 4.2.1.1 General 189 When conducting this test with a fuse using a polymeric insulator(s), it is not necessary to also 190 perform the mechanical tests outlined in 8.8.1 of IEC 60282-2:2008. The testing covered in 4.2.1 only 191 applies to disconnecting devices that can be opened and closed manually. 192 oSIST prEN IEC 60282-4:2018

IEC CDV 60282-4/ED1  IEC:2018 – 8 – 32A/342/CDV 4.2.1.2 Test procedure

193 Three new fuses shall be used for this test. The test samples shall consist of the fuse-base, fuse-194 carrier, and end fittings. The fuse carriers should contain fuse-links of sufficiently high current rating, 195 or dummy links, so that the fuse-links are not subjected to the same endurance test as the fuse-bases 196 and fuse-carriers.

197 All samples shall be cycled between -30 °C (+0 ºC, −5 ºC) and +40 °C (+5 ºC, −0 ºC). The samples 198 shall remain at each temperature extreme for a minimum of 8 h per cycle. The cycle time from one 199 temperature extreme to the other shall be any convenient value, however the sample rate of 200 temperature change should be no more than 0.5 ºC/min and steps should be taken to avoid thermal 201 shock. All samples shall complete 4 cycles (a cycle includes both temperature extremes) resulting in a 202 minimum total test time of approximately 83 h. See Figure 1 for a representation of the preferred test 203 sequence. If the specified minimum ambient air temperature for the fuse is ot

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