prEN IEC 62896:2023
(Main)Hybrid insulators for a.c. and d.c. for high-voltage applications greater than 1000V AC and 1500 V DC - Definitions, test methods and acceptance criteria
Hybrid insulators for a.c. and d.c. for high-voltage applications greater than 1000V AC and 1500 V DC - Definitions, test methods and acceptance criteria
Hybridisolatoren für Wechsel- und Gleichspannungsanwendungen für Spannungen größer 1000 V AC und 1500 V DC – Definitionen, Prüfmethoden und Annahmebedingungen
Hibridni izolatorji za izmenične in enosmerne visokonapetostne aplikacije za izmenične napetosti nad 1000 V in enosmerne napetosti nad 1500 V - Definicije, preskusne metode, merila sprejemljivost
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 62896:2023
01-april-2023
Hibridni izolatorji za izmenične in enosmerne visokonapetostne aplikacije za
izmenične napetosti nad 1000 V in enosmerne napetosti nad 1500 V - Definicije,
preskusne metode, merila sprejemljivost
Hybrid insulators for a.c. and d.c. for high-voltage applications greater than 1000V AC
and 1500 V DC - Definitions, test methods and acceptance criteriaTa slovenski standard je istoveten z: prEN IEC 62896:2023
ICS:
29.080.10 Izolatorji Insulators
oSIST prEN IEC 62896:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 62896:2023
36/554/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62896 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-01-27 2023-04-21
SUPERSEDES DOCUMENTS:
36/539/CD, 36/551A/CC
IEC TC 36 : INSULATORS
SECRETARIAT: SECRETARY:
Sweden Mr Dan Windmar
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
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 NOT SUBMITTED FOR CENELEC PARALLEL VOTING
This document is still under study and subject to change. It should not be used for reference purposes.
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AC/22/2007.TITLE:
Hybrid insulators for a.c. and d.c. for high-voltage applications greater than 1000V AC and 1500
V DC - Definitions, test methods and acceptance criteriaPROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
Copyright © 2022 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
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part of it, for any other purpose without permission in writing from IEC.---------------------- Page: 3 ----------------------
oSIST prEN IEC 62896:2023
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1 CONTENTS
2 FOREWORD ......................................................................................................................... 3
3 INTRODUCTION ................................................................................................................... 5
4 1 Scope ............................................................................................................................ 6
5 2 Normative references..................................................................................................... 6
6 3 Definitions ..................................................................................................................... 7
7 4 Identification ................................................................................................................ 10
8 5 Environmental conditions ............................................................................................. 10
9 6 Tolerances .................................................................................................................. 10
10 7 Classification of tests ................................................................................................... 10
11 7.1 Design tests ........................................................................................................ 10
12 7.2 Type tests ........................................................................................................... 11
13 7.3 Sample tests ....................................................................................................... 11
14 7.4 Routine tests ....................................................................................................... 11
15 8 Design tests ................................................................................................................ 13
16 8.1 General ............................................................................................................... 13
17 8.2 Tests on interfaces and connections of end fittings .............................................. 14
18 8.2.1 General ....................................................................................................... 14
19 8.2.2 Pre-stressing ............................................................................................... 14
20 8.2.3 Verification tests .......................................................................................... 15
21 8.3 Tests on Shed and Housing Material ................................................................... 15
22 8.3.1 Hardness test .............................................................................................. 15
23 8.3.2 Accelerated weathering test ......................................................................... 15
24 8.3.3 Tracking and erosion test ............................................................................. 15
25 8.3.4 Flammability test .......................................................................................... 15
26 8.3.5 Hydrophobicity transfer test .......................................................................... 15
27 9 Type tests ................................................................................................................... 16
28 9.1 General ............................................................................................................... 16
29 9.2 Electrical tests .................................................................................................... 16
30 9.3 Mechanical tests ................................................................................................. 16
31 10 Sample tests ............................................................................................................... 16
32 11 Routine tests ............................................................................................................... 16
33 Bibliography ....................................................................................................................... 18
35 Figure 1 – Thermal cycle test .............................................................................................. 14
37 Table 1 – Required tests ..................................................................................................... 12
38 Table 2 – Design tests ........................................................................................................ 13
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42 INTERNATIONAL ELECTROTECHNICAL COMMISSION
43 ____________
45 HYBRID INSULATORS FOR AC AND DC HIGH-VOLTAGE APPLICATIONS
46 GREATER THAN 1000 V AC and 1500 V DC – DEFINITIONS, TEST
47 METHODS
48 AND ACCEPTANCE CRITERIA
51 FOREWORD
52 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization compris ing
53 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
54 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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60 International Organization for Standardization (ISO) in accordance with conditions determined by agreement
61 between the two organizations.62 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
63 consensus of opinion on the relevant subjects since each technical committee has representation from all
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80 Publications.81 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
82 indispensable for the correct application of this publication.83 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
84 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
85 This new edition cancels and replaces the technical specification and the document is
86 transferred into international standard as per result of inquiry.---------------------- Page: 5 ----------------------
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89 The text of this standard is based on the following documents:
CDV Report on voting
To be completed To be completed
91 Full information on the voting for the approval of this standard can be found in the report on
92 voting indicated in the above table.93 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
94 The committee has decided that the contents of this publication will remain unchanged until
95 the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
96 the data related to the specific publication. At this date, the publication will be
97 • reconfirmed,98 • withdrawn,
99 • replaced by a revised edition, or
100 • amended.
101
102
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103 INTRODUCTION
104 Hybrid insulators consist of an insulating core, bearing the mechanical load protected by a
105 polymeric housing, the load being transmitted to the core by end fittings. Despite these
106 common features, the materials used and the construction details employed by different
107 manufacturers may be quite different. The core is made of ceramic or glass material.
108 Hybrid insulators are applied as overhead line, post or hollow core equipment insulators. In
109 order to perform the design tests, IEC 62217 shall be applied for the polymeric housing and
110 the interfaces between core and the housing. For the core, the test standards for the
111 respective ceramic product (IEC 60168, IEC 60383-1/-2 and IEC 62155) shall be applied.
112 Some tests have been grouped together as "design tests", to be performed only once on
113 insulators which satisfy the same design conditions. For all design tests of hybrid insulators,
114 the common clauses defined in IEC 62217 are applied. As far as practical, the influence of
115 time on the electrical and mechanical properties of the components (core material, housing,
116 interfaces etc.) and of the complete hybrid insulators has been considered in specifying the
117 design tests to ensure a satisfactory life-time under normally known stress conditions in
118 service.119 Polymeric housing materials that show the hydrophobicity transfer mechanism (HTM) are
120 preferred for hybrid insulators. They are applied as a countermeasure against severe polluted
121 service conditions.122 Pollution tests according to IEC 60507 or IEC 61245 are not included in this standard since
123 they are designed for non-polymeric items. Specific pollution tests for polymeric insulators are
124 still under consideration.125
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126 HYBRID INSULATORS FOR AC AND DC HIGH-VOLTAGE APPLICATIONS
127 GREATER THAN 1000 V AC, and 1500 V DC – DEFINITIONS, TEST
128 METHODS
129 AND ACCEPTANCE CRITERIA
130
131
132
133 1 Scope
134 This document applies to hybrid insulators for AC and DC applications greater than 1000 V
135 AC and 1500 V DC consisting of a load-bearing insulating solid or hollow core consisting of
136 ceramic or glass, a housing (defined geometry, outside the insulating core) made of polymeric
137 material and end fittings permanently attached to the insulating core.138 Hybrid insulators covered by this document are intended for use as suspension/tension long
139 rod and cap and pin type insulators, line post insulators, station post insulators and hollow
140 core insulators for apparatus.141 The object of this document is to:
142 • define the terms used;
143 • prescribe test methods;
144 • prescribe acceptance criteria.
145 Silicone or other functional coatings (CIGRE Technical Brochure No. 478), booster sheds,
146 shed extenders and rain deflectors are not within the scope of this document. CIGRE B2.69
147 published two Technical Brochures, TB 837 and TB 838, in June 2021 with the scope of
148 practical applications and collection of experiences for anti-pollution coatings for insulators
149 This document does not include requirements dealing with the choice of insulators for specific
150 operating conditions.151 2 Normative references
152 The following documents, in whole or in part, are normatively referenced in this document and
153 are indispensable for its application. For dated references, only the edition cited applies. For
154 undated references, the latest edition of the referenced document (including any
155 amendments) applies.156 IEC 60050-471, International Electrotechnical Vocabulary – Part 471: Insulators
157 IEC 60168, Tests on indoor and outdoor post insulators of ceramic material or glass for
158 systems with nominal voltages greater than 1000 V159 IEC 60383-1, Insulators for overhead lines with a nominal voltage above 1000 V – Part 1:
160 Ceramic or glass insulator units for a.c. systems – Definitions, test methods and acceptance
161 criteria162 IEC 60383-2, Insulators for overhead lines with a nominal voltage above 1000 V – Part 2:
163 Insulator strings and insulator sets for a.c. systems – Definitions, test methods and
164 acceptance criteria165 IEC 62155, Hollow pressurized and unpressurized ceramic and glass insulators for use in
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167 IEC 62217, Polymeric HV insulators for indoor and outdoor use – General definitions, test
168 methods and acceptance criteria169 IEC 61211, Insulators of ceramic material or glass for overhead lines with a nominal voltage
170 greater than 1 000 V – Impulse puncture testing in air171 IEC 61325, Insulators for overhead lines with a nominal voltage above 1000 V - Ceramic or
172 glass insulator units for d.c. systems - Definitions, test methods and acceptance criteria
173 3 Definitions174 For the purpose of this document the terms and definitions given in IEC 60050-471 and the
175 following apply (some definitions from IEC 62217 are reproduced here for ease of reference).
176 3.1177 High-voltage
178 HV
179 voltage over 1 000 V AC or over 1 500 V DC or over 1 500 V peak value
180 3.2
181 polymeric insulator
182 insulator whose insulating body consists of at least one organic based material
183 Note 1 to entry: Polymeric insulators are also known as non-ceramic insulators.
184 Note 2 to entry: Coupling devices may be attached to the ends of the insulating body.
185 [SOURCE: IEC 60050-471, 471-01-13]186 3.3
187 resin insulator
188 polymeric insulator whose insulating body consists of a solid insulator trunk and sheds
189 protruding from the insulator trunk made from only one organic based housing material (e.g.
190 cycloaliphatic epoxy)191
192 3.4
193 composite insulator
194 polymeric insulator made of at least two polymeric insulating parts, namely a core and a
195 housing, equipped with metal fittings196 Note 1 to entry: Composite insulators, for example, can consist either of individual sheds mounted on the core,
197 with or without an intermediate sheath, or alternatively, of a housing directly moulded or cast in one or several
198 pieces on to the core.199 [SOURCE: IEC 60050-471, 471-01-02]
200 3.5
201 hybrid insulator
202 insulator that consists of a ceramic core and a polymeric housing, equipped with one or more
203 metal fittings204 Note 1 to entry: According to IEC TS 62896.
205 Note 2 to entry: The mechanical functions are mainly characterised by the core, the external electrical functions are mainly
206 characterised by the polymeric housing. The housing may cover the core completely or partly. In the latter case the exposed
207 portions of the ceramic core are usually covered by glaze.---------------------- Page: 9 ----------------------
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Polymeric insulator Ceramic / glass insulator
Housing Core
Resin Composite
Hybrid insulator
insulator insulator
IEC
208
209
210 3.6
211 core
212 central insulating part of an insulator which provides the mechanical characteristics
213 Note 1 to entry: The housing and sheds are not part of the core.214 [SOURCE: IEC 60050-471, 471-01-11]
215 3.7
216 insulator trunk
217 central insulating part of an insulator from which the sheds project
218 Note 1 to entry: Also known as shank on smaller insulators.
219 [SOURCE: IEC 60050-471, 471-01-11]
220 3.8
221 housing
222 external insulating part of a composite insulator providing the necessary creepage distance and
223 protecting core from environment224 Note 1 to entry: An intermediate sheath made of insulating material may be part of the housing.
225 [SOURCE: IEC 60050-471, 471-01-09]226 3.9
227 shed (of an insulator)
228 insulating part, projecting from the insulator trunk, intended to increase the creepage distance
229 Note 1 to entry: The shed can be with or without ribs.230 [SOURCE: IEC 60050-471, 471-01-15]
231 3.10
232 creepage distance
233 shortest distance or the sum of the shortest distances along the surface on an insulator between
234 two conductive parts which normally have the operating voltage between them235 [SOURCE: IEC 60050-471, 471-01-04]
236 3.11
237 arcing distance
238 shortest distance in air external to the insulator between the metallic parts which normally have
239 the operating voltage between them240 [SOURCE: IEC 60050-471, 471-01-01]
241 3.12
242 sheath
243 uniform and continuous tubular covering made of insulating material
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244 [SOURCE: IEC 60050-151, 151-12-41]
245 3.13
246 Interfaces
247 surface between the different materials
248 Note 1 to entry: Various interfaces can be found in most composite insulators, e.g.:
249 - between housing and fixing devices;250 - between various parts of the housing; e.g. between sheds, or between sheath and sheds;
251 - between core and housing.252 3.14
253 end fitting fixing device
254 integral component or formed part of an insulator, intended to connect it to a supporting
255 structure, or to a conductor, or to an item of equipment, or to another insulator
256 Note 1 to entry: Where the end fitting is metallic, the term “metal fitting” is normally used.
257 [SOURCE: IEC 60050-471, 471-01-06, modified by the addition of a synonym]258 3.15
259 connection zone
260 zone where the mechanical load is transmitted between the insulating body and the fixing
261 device262 3.16
263 coupling
264 part of the fixing device which transmits load to the hardware external to the insulator
265 3.17266 tracking
267 progressive degradation of the surface of a solid insulating material by local discharges to form
268 conducting or partially conducting paths (see IEC 60060-212-01-42)269 Note 1 to entry: Tracking paths are conductive even under dry conditions..
270 3.18
271 erosion
272 Loss of material due to leakage current or electrical discharge.
273 Note 1 to entry: Light surface traces, commonly tree-shaped, can occur on composite insulators as on ceramic
274 insulators, after...
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