IEC TS 62896:2015
(Main)Hybrid insulators for a.c. and d.c. for high-voltage applications - Definitions, test methods and acceptance criteria
Hybrid insulators for a.c. and d.c. for high-voltage applications - Definitions, test methods and acceptance criteria
IEC TS 62896:2015(E) applies to hybrid insulators for a.c. and d.c. applications consisting of a load-bearing insulating solid or hollow core consisting of ceramic or glass, a housing (defined geometry, outside the insulating core) made of polymeric material and end fittings permanently attached to the insulating core. Hybrid insulators covered by this technical specification are intended for use as suspension/tension line insulators, line post insulators, station post insulators and hollow core insulators for apparatus. The object of this technical specification is to:
- define the terms used;
- prescribe test methods;
- prescribe acceptance criteria.
Silicone or other functional coatings (CIGRE Technical Brochure No. 478, Appendix B), booster sheds, shed extenders and rain deflectors are not within the scope of this technical specification. This technical specification does not include requirements dealing with the choice of insulators for specific operating conditions.
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IEC TS 62896 ®
Edition 1.0 2015-11
TECHNICAL
SPECIFICATION
Hybrid insulators for a.c. and d.c. high-voltage applications – Definitions, test
methods and acceptance criteria
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 15
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 60 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,
77, 86 and CISPR.
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IEC TS 62896 ®
Edition 1.0 2015-11
TECHNICAL
SPECIFICATION
Hybrid insulators for a.c. and d.c. high-voltage applications – Definitions, test
methods and acceptance criteria
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.080.10 ISBN 978-2-8322-3017-6
– 2 – IEC TS 62896:2015 IEC 2015
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Definitions . 7
4 Identification . 9
5 Environmental conditions . 9
6 Tolerances . 9
7 Classification of tests . 10
7.1 Design tests . 10
7.2 Type tests . 10
7.3 Sample tests . 11
7.4 Routine tests . 11
8 Design tests . 12
8.1 General . 12
8.2 Tests on interfaces and connections of end fittings . 13
8.2.1 General . 13
8.2.2 Pre-stressing . 13
8.2.3 Verification tests . 14
8.3 Tests on Shed and Housing Material . 14
8.3.1 Hardness test . 14
8.3.2 Accelerated weathering test . 14
8.3.3 Tracking and erosion test . 15
8.3.4 Flammability test . 15
9 Type tests . 15
9.1 General . 15
9.2 Electrical tests . 15
9.3 Mechanical tests . 15
10 Sample tests . 15
11 Routine tests . 15
Annex A (informative) Comparison between hybrid insulators and glass fibre cored
polymeric housing and porcelain insulators. 16
A.1 History . 16
A.2 Comparison between porcelain and pultruded GFRP rod . 16
A.3 Advantages of hybrid insulators over conventional porcelain insulators . 16
A.4 Advantages of hybrid insulators over glass fibre cored insulators . 17
A.5 Problems shared with polymeric insulators . 17
A.6 Transport, storage and installation . 17
Bibliography . 18
Figure 1 – Thermal cycle test . 14
Table 1 – Required tests . 12
Table 2 – Design tests. 13
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HYBRID INSULATORS FOR A.C. AND D.C. HIGH-VOLTAGE
APPLICATIONS – DEFINITIONS, TEST METHODS
AND ACCEPTANCE CRITERIA
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.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC TS 62896, which is a technical specification, has been prepared by IEC technical
committee 36: Insulators.
– 4 – IEC TS 62896:2015 IEC 2015
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
36/362/DTS 36/368/RVC
Full information on the voting for the approval of this technical specification 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.
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
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
Hybrid insulators consist of an insulating core, bearing the mechanical load protected by a
polymeric housing, the load being transmitted to the core by end fittings. Despite these
common features, the materials used and the construction details employed by different
manufacturers may be quite different. The core is made of ceramic or glass material.
Hybrid insulators are applied as overhead line, post or hollow core equipment insulators. In
order to perform the design tests, IEC 62217 shall be applied for the polymeric housing and the
interfaces between core and the housing. For the core, the test standards for the
...
IEC TS 62896 ®
Edition 1.0 2015-11
TECHNICAL
SPECIFICATION
Hybrid insulators for a.c. and d.c. high-voltage applications – Definitions, test
methods and acceptance criteria
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 15
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 60 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,
77, 86 and CISPR.
IEC Just Published - webstore.iec.ch/justpublished
Stay up to date on all new IEC publications. Just Published IEC Customer Service Centre - webstore.iec.ch/csc
details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: csc@iec.ch.
IEC TS 62896 ®
Edition 1.0 2015-11
TECHNICAL
SPECIFICATION
Hybrid insulators for a.c. and d.c. high-voltage applications – Definitions, test
methods and acceptance criteria
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.080.10 ISBN 978-2-8322-3017-6
– 2 – IEC TS 62896:2015 IEC 2015
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Definitions . 7
4 Identification . 9
5 Environmental conditions . 9
6 Tolerances . 9
7 Classification of tests . 10
7.1 Design tests . 10
7.2 Type tests . 10
7.3 Sample tests . 11
7.4 Routine tests . 11
8 Design tests . 12
8.1 General . 12
8.2 Tests on interfaces and connections of end fittings . 13
8.2.1 General . 13
8.2.2 Pre-stressing . 13
8.2.3 Verification tests . 14
8.3 Tests on Shed and Housing Material . 14
8.3.1 Hardness test . 14
8.3.2 Accelerated weathering test . 14
8.3.3 Tracking and erosion test . 15
8.3.4 Flammability test . 15
9 Type tests . 15
9.1 General . 15
9.2 Electrical tests . 15
9.3 Mechanical tests . 15
10 Sample tests . 15
11 Routine tests . 15
Annex A (informative) Comparison between hybrid insulators and glass fibre cored
polymeric housing and porcelain insulators. 16
A.1 History . 16
A.2 Comparison between porcelain and pultruded GFRP rod . 16
A.3 Advantages of hybrid insulators over conventional porcelain insulators . 16
A.4 Advantages of hybrid insulators over glass fibre cored insulators . 17
A.5 Problems shared with polymeric insulators . 17
A.6 Transport, storage and installation . 17
Bibliography . 18
Figure 1 – Thermal cycle test . 14
Table 1 – Required tests . 12
Table 2 – Design tests. 13
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HYBRID INSULATORS FOR A.C. AND D.C. HIGH-VOLTAGE
APPLICATIONS – DEFINITIONS, TEST METHODS
AND ACCEPTANCE CRITERIA
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.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC TS 62896, which is a technical specification, has been prepared by IEC technical
committee 36: Insulators.
– 4 – IEC TS 62896:2015 IEC 2015
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
36/362/DTS 36/368/RVC
Full information on the voting for the approval of this technical specification 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.
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
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
Hybrid insulators consist of an insulating core, bearing the mechanical load protected by a
polymeric housing, the load being transmitted to the core by end fittings. Despite these
common features, the materials used and the construction details employed by different
manufacturers may be quite different. The core is made of ceramic or glass material.
Hybrid insulators are applied as overhead line, post or hollow core equipment insulators. In
order to perform the design tests, IEC 62217 shall be applied for the polymeric housing and the
interfaces between core and the housing. For the core, the test standards for the respective
ceramic product (IEC 60168, IEC 60383 and IEC 62155) shall be applied.
Some tests have been grouped together as "design tests", to be performed only once on
ins
...
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