1、 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 IEC TS 62896:2015-11(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2015 IEC, Geneva, Switzerland All rights reserved. Unle
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11、ns, test methods and acceptance criteria INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.080.10 ISBN 978-2-8322-3017-6 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 IEC TS 62896:2015 IEC
12、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 . 1
13、2 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 F
14、lammability 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 Compariso
15、n 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 Bibli
16、ography 18 Figure 1 Thermal cycle test 14 Table 1 Required tests . 12 Table 2 Design tests. 13 IEC TS 62896:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HYBRID INSULATORS FOR A.C. AND D.C. HIGH-VOLTAGE APPLICATIONS DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA FOREWORD 1) The Inte
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29、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: Insul
30、ators. 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
31、 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 spe
32、cific publication. At this date, the publication will be transformed into an International standard, reconfirmed, withdrawn, replaced by a revised edition, or amended. IEC TS 62896:2015 IEC 2015 5 INTRODUCTION Hybrid insulators consist of an insulating core, bearing the mechanical load protected by
33、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 over
34、head 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) sh
35、all be applied. Some tests have been grouped together as “design tests“, to be performed only once on insulators which satisfy the same design conditions. For all design tests of hybrid insulators, the common clauses defined in IEC 62217 are applied. As far as practical, the influence of time on the
36、 electrical and mechanical properties of the components (core material, housing, interfaces etc.) and of the complete hybrid insulators has been considered in specifying the design tests to ensure a satisfactory life-time under normally known stress conditions in service. Polymeric housing materials
37、 that show the hydrophobicity transfer mechanism (HTM) are preferred for hybrid insulators. They are applied as a countermeasure against severe polluted service conditions. For the time being, no ageing or pollution tests have been developed for the verification of this property, but CIGRE Technical
38、 Brochure No. 442 is available for the evaluation of the retention of the hydrophobicity and the HTM of polymeric housing materials. Artificial pollution tests for insulators with polymeric housings under AC and DC voltage stress are presently under development by CIGRE. 6 IEC TS 62896:2015 IEC 2015
39、 HYBRID INSULATORS FOR A.C. AND D.C. HIGH-VOLTAGE APPLICATIONS DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA 1 Scope This technical specification 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 glas
40、s, 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 po
41、st 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
42、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. 2 Normative references The following documents, in whole or in part, are normatively refer
43、enced 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. IEC 60050-471:2007, International Electrotechnical Vocabulary Part 471: In
44、sulators IEC 60168, Tests on indoor and outdoor post insulators of ceramic material or glass for systems with nominal voltages greater than 1000 V IEC 60383-1, Insulators for overhead lines with a nominal voltage above 1000 V Part 1: Ceramic or glass insulator units for a.c. systems Definitions, tes
45、t methods and acceptance criteria IEC 60383-2, Insulators for overhead lines with a nominal voltage above 1000 V Part 2: Insulator strings and insulator sets for a.c. systems Definitions, test methods and acceptance criteria IEC 62155, Hollow pressurized and unpressurized ceramic and glass insulator
46、s for use in electrical equipment with rated voltages greater than 1 000 V IEC TS 62896:2015 IEC 2015 7 IEC 62217, Polymeric HV insulators for indoor and outdoor use General definitions, test methods and acceptance criteria 3 Definitions For the purpose of this document the terms and definitions giv
47、en in IEC 60050-471 and the following apply (some definitions from IEC 62217 are reproduced here for ease of reference). 3.1 high voltage HV voltage over 1 000 V a.c. or over 1 500 V d.c. or over 1 500 V peak value 3.2 polymeric insulator insulator whose insulating body consists of only polymer cont
48、aining materials, to the ends of which coupling devices may be attached Note 1 to entry: Polymeric insulators are also known as non-ceramic insulators. 3.2.1 resin insulator polymeric insulator whose insulating body consists of a solid shank and sheds protruding from the shank made from only one org
49、anic based housing material (e.g. cycloaliphatic epoxy) 3.2.2 composite insulator polymeric insulator made of at least two polymeric insulating parts, namely a core and a housing, equipped with metal fittings Note 1 to entry: Composite insulators, for example, can consist either of individual sheds mounted on the core, with or without an intermediate sheath, or alternatively, of a housing directly moulded or cast in one or several pieces on to the core. 3.3 hybrid insulator insulator tha
