oSIST prEN IEC 60455-2:2023

Resin based reactive compounds used for electrical insulation - Part 2: Methods of test

Reaktionsharzmassen für die Elektroisolierung - Teil 2: Prüfverfahren

Composés réactifs à base de résines utilisés comme isolants électriques - Partie 2: Méthodes d'essai

Reaktivne zmesi na osnovi smole, ki se uporabljajo za električno izolacijo - 2. del: Preskusne metode

General Information

• Status: Not Published
• Public Enquiry End Date: 31-Jan-2023
• ICS: 17.200.99 - Other standards related to thermodynamics
• ICS: 17.220.99 - Other standards related to electricity and magnetism
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: IIZS - Insulating materials and systems
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 18-Nov-2022
• Due Date: 07-Apr-2023
• Ref Project: prEN IEC 60455-2:2022 - Resin based reactive compounds used for electrical insulation - Part 2: Methods of test

RELATIONS

• Revised: SIST EN 60455-2:2016 - Resin based reactive compounds used for electrical insulation - Part 2: Methods of test (IEC 60455-2:2015)
• Effective Date: 24-Dec-2019

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN IEC 60455-2:2023
01-januar-2023

Reaktivne zmesi na osnovi smole, ki se uporabljajo za električno izolacijo - 2. del:

Preskusne metode

Resin based reactive compounds used for electrical insulation - Part 2: Methods of test

Reaktionsharzmassen für die Elektroisolierung - Teil 2: Prüfverfahren

Composés réactifs à base de résines utilisés comme isolants électriques - Partie 2:

Méthodes d'essai
Ta slovenski standard je istoveten z: prEN IEC 60455-2:2022
ICS:
29.035.01 Izolacijski materiali na Insulating materials in
splošno general
oSIST prEN IEC 60455-2:2023 en

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

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oSIST prEN IEC 60455-2:2023
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oSIST prEN IEC 60455-2:2023
15/978/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60455-2 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-11-11 2023-02-03
SUPERSEDES DOCUMENTS:
15/910/CD, 15/935A/CC
IEC TC 15 : SOLID ELECTRICAL INSULATING MATERIALS
SECRETARIAT: SECRETARY:
United States of America Mr Solomon Chiang
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 112
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

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.

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:

Resin based reactive compounds used for electrical insulation - Part 2: Methods of test

PROPOSED STABILITY DATE: 2028
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 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.
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oSIST prEN IEC 60455-2:2023
IEC CDV 60455-2/Ed4 © IEC 2022 – 2 – 15/978/CDV
2 CONTENTS

4 FOREWORD ........................................................................................................................... 5

5 INTRODUCTION ..................................................................................................................... 7

6 1 Scope .............................................................................................................................. 8

7 2 Normative references ...................................................................................................... 8

8 3 Terms and definitions .................................................................................................... 11

9 4 General notes on methods of test .................................................................................. 11

10 4.1 Preparation and conditioning ................................................................................ 11

11 4.2 Sequence of tests ................................................................................................. 12

12 4.3 Test report ............................................................................................................ 12

13 5 Methods of test for reactive compounds and their components ...................................... 12

14 5.1 Flash point ............................................................................................................ 12

15 5.2 Density ................................................................................................................. 12

16 5.3 Viscosity ............................................................................................................... 12

17 5.4 Viscosity after storing at elevated temperature ...................................................... 13

18 5.5 Content of volatile organic components ................................................................. 13

19 5.6 Isothermal increase of viscosity (processing time) ................................................ 13

20 5.7 Shelf life ............................................................................................................... 13

21 5.8 Colour ................................................................................................................... 14

22 5.9 Softening temperature .......................................................................................... 14

23 5.10 Ash content........................................................................................................... 14

24 5.11 Filler content ......................................................................................................... 14

25 5.12 Chlorine content ................................................................................................... 14

26 5.12.1 Total chlorine content of unsaturated polyesters and epoxide resins .............. 14

27 5.12.2 Inorganic chlorine content of epoxide resins and glycidyl esters .................... 14

28 5.12.3 Easily saponifiable chlorine content of epoxide resins and related

29 materials ....................................................................................................... 14

30 5.13 Tendency of crystallisation .................................................................................... 14

31 5.14 Epoxide equivalent of epoxide resins .................................................................... 14

32 5.15 Content of isocyanate ........................................................................................... 14

33 5.16 Water content (Karl Fischer method) ..................................................................... 15

34 5.17 Hydroxyl value ...................................................................................................... 15

35 5.17.1 Polyester resins ............................................................................................. 15

36 5.17.2 Resins other than polyester ........................................................................... 15

37 5.18 Acid value of polyester resins ............................................................................... 15

38 5.19 Amount of double bonds of unsaturated polyester and acrylate resins .................. 15

39 5.20 Acid and acid-anhydride content of acid-anhydride hardeners ............................... 15

40 5.21 Amine value .......................................................................................................... 15

41 5.22 Pot life .................................................................................................................. 15

42 5.22.1 General ......................................................................................................... 15

43 5.22.2 Resinous compounds for cable accessories ................................................... 15

44 5.23 Gel time ................................................................................................................ 16

45 5.23.1 Unsaturated polyester based compounds ...................................................... 16

46 5.23.2 Phenolic resin based compounds................................................................... 16

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47 5.23.3 Other compounds .......................................................................................... 16

48 5.24 Exothermic temperature rise ................................................................................. 16

49 5.24.1 Unsaturated polyester based compounds ...................................................... 16

50 5.24.2 Resinous compounds for cable accessories ................................................... 17

51 5.25 Total volume shrinkage of epoxide and unsaturated polyester based

52 compounds ........................................................................................................... 17

53 5.26 Curing in presence of water .................................................................................. 17

54 5.26.1 General ......................................................................................................... 17

55 5.26.2 Apparatus and materials ................................................................................ 18

56 5.26.3 Pouring device ............................................................................................... 18

57 5.26.4 Procedure ...................................................................................................... 18

58 5.27 Determination of the degree of curing ................................................................... 19

59 5.28 Curing in thick layer and emissions during curing .................................................. 19

60 5.28.1 General ......................................................................................................... 19

61 5.28.2 Equipment ..................................................................................................... 19

62 5.28.3 Test specimen ............................................................................................... 20

63 5.28.4 Procedure ...................................................................................................... 20

64 6 Methods of test for cured reactive compounds ............................................................... 21

65 6.1 General ................................................................................................................. 21

66 6.2 Test specimens ..................................................................................................... 21

67 6.2.1 General ......................................................................................................... 21

68 6.2.2 Preparation of the reactive compound............................................................ 21

69 6.2.3 Preparation of test specimens ....................................................................... 21

70 6.2.4 Type and number of test specimens .............................................................. 22

71 6.3 Density ................................................................................................................. 22

72 6.4 Mechanical properties ........................................................................................... 22

73 6.4.1 Tensile properties .......................................................................................... 22

74 6.4.2 Compressive properties ................................................................................. 22

75 6.4.3 Flexural properties ......................................................................................... 22

76 6.4.4 Impact strength .............................................................................................. 23

77 6.4.5 Hardness ....................................................................................................... 23

78 6.5 Thermal properties ................................................................................................ 23

79 6.5.1 Bond strength at elevated temperature .......................................................... 23

80 6.5.2 Linear thermal expansion............................................................................... 23

81 6.5.3 Thermal conductivity ...................................................................................... 23

82 6.5.4 Glass transition ............................................................................................. 23

83 6.5.5 Flammability .................................................................................................. 24

84 6.5.6 Thermal shock ............................................................................................... 24

85 6.5.7 Dry heat resistance of resins for cable accessories – Method of test ............. 24

86 6.5.8 Wet heat resistance of resins for cable accessories ....................................... 25

87 6.5.9 Loss of mass ................................................................................................. 28

88 6.5.10 Temperature index......................................................................................... 28

89 6.6 Chemical properties .............................................................................................. 29

90 6.6.1 Water absorption ........................................................................................... 29

91 6.6.2 Effect of liquid chemicals ............................................................................... 29

92 6.6.3 Resistance to mould growth ........................................................................... 29

93 6.6.4 Water vapour permeability ............................................................................. 29

94 6.7 Electrical properties .............................................................................................. 29

95 6.7.1 Electrical properties ....................................................................................... 29

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96 6.7.2 Electrical properties ....................................................................................... 29

97 6.7.3 Electrical properties ....................................................................................... 30

98 6.7.4 Proof tracking index (PTI) .............................................................................. 31

99 6.7.5 Electrolytic corrosion ..................................................................................... 31

100 Annex A (informative) Health and safety .............................................................................. 34

101 Bibliography .......................................................................................................................... 35

102
103
104
105
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106 INTERNATIONAL ELECTROTECHNICAL COMMISSION
107 ____________
108
109 RESIN BASED REACTIVE COMPOUNDS USED FOR ELECTRICAL
110 INSULATION –
111
112 Part 2: Methods of test
113
114
115
116 FOREWORD

117 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

118 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

119 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

120 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

121 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

122 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

123 may participate in this preparatory work. International, governmental and non-governmental organizations liaising

124 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

125 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

126 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

127 consensus of opinion on the relevant subjects since each technical committee has representation from all

128 interested IEC National Committees.

129 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

130 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

131 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

132 misinterpretation by any end user.

133 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

134 transparently to the maximum extent possible in their national and regional publications. Any divergence between

135 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

136 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

137 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

138 services carried out by independent certification bodies.

139 6) All users should ensure that they have the latest edition of this publication.

140 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

141 members of its technical committees and IEC National Committees for any personal injury, property damage or

142 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

143 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

144 Publications.

145 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

146 indispensable for the correct application of this publication.

147 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

148 rights. IEC shall not be held responsible for identifying any or all such patent rights.

149 International Standard IEC 60455-2 has been prepared by IEC technical committee 15: Solid

150 electrical insulating materials.

151 This third edition cancels and replaces the second edition published in 1998. This edition

152 constitutes a technical revision.

153 This edition includes the following significant technical changes with respect to the previous

154 edition:
155 a) Introduction of test methods related to IEC 60455-3-8;
156 b) Additional and updated test methods for resins
157
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158
159
160 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
161

162 Full information on the voting for its approval can be found in the report on voting indicated in

163 the above table.

164 The language used for the development of this International Standard, is English.

165 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

166 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

167 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

168 described in greater detail at www.iec.ch/standardsdev/publications.

169 The committee has decided that the contents of this document will remain unchanged until the

170 stability date indicated on the IEC website under webstore.iec.ch in the data related to the

171 specific document. At this date, the document will be
172 • reconfirmed,
173 • withdrawn,
174 • replaced by a revised edition, or
175 • amended.
176
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177 INTRODUCTION

178 This part of IEC 60455 is one of a series which deals with solvent-free resin based reactive

179 compounds and their components used for electrical insulation.
180 The series consists of three parts:
181 – Part 1: Definitions and general requirements (IEC 60455-1);
182 – Part 2: Methods of test (IEC 60455-2);
183 – Part 3: Specifications for individual materials (IEC 60455-3).

184 The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed

185 that compliance with this document may involve the use of a patent. IEC takes no position

186 concerning the evidence, validity, and scope of this patent right.

187 The holder of this patent right has assured IEC that s/he is willing to negotiate licences under

188 reasonable and non-discriminatory terms and conditions with applicants throughout the world.

189 In this respect, the statement of the holder of this patent right is registered with IEC. Information

190 may be obtained from the patent database available at patents.iec.ch/.

191 Attention is drawn to the possibility that some of the elements of this document may be the

192 subject of patent rights other than those in the patent database. IEC shall not be held

193 responsible for identifying any or all such patent rights.
194
195
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196 RESIN BASED REACTIVE COMPOUNDS
197 USED FOR ELECTRICAL INSULATION –
198
199 Part 2: Methods of test
200
201
202
203 1 Scope

204 This part of IEC 60455 specifies methods of test to be used for testing resin based reactive

205 compounds, their components and cured compounds used for electrical insulation.

206 2 Normative references

207 The following documents are referred to in the text in such a way that some or all of their content

208 constitutes requirements of this document. For dated references, only the edition cited applies.

209 For undated references, the latest edition of the referenced document (including any

210 amendments) applies.

211 IEC 60050 (all parts), International Electrotechnical Vocabulary (available at

212 http://www.electropedia.org)

213 IEC 60068-2-10:2005, Environmental testing – Part 2-10: Tests – Test J and guidance: Mould

214 growth

215 IEC 60093:1980, Methods of test for volume resistivity and surface resistivity of solid electrical

216 insulating materials

217 IEC 60112:2003, Method for the determination of the proof and the comparative tracking indices

218 of solid insulating materials

219 IEC 60216 (all parts), Electrical insulating materials – Thermal endurance properties

220 IEC 60243-1:2013, Electrical strength of insulating materials – Test methods – Part 1: Tests at

221 power frequencies

222 IEC 60250:1969, Recommended methods for the determination of the permittivity and dielectric

223 dissipation factor of electrical insulating materials at power, audio and radio frequencies

224 including metre wavelengths

225 IEC 60296:2012, Fluids for electrotechnical applications – Unused mineral insulating oils for

226 transformers and switchgear

227 IEC 60426:2007, Electrical insulating materials – Determination of electrolytic corrosion caused

228 by insulating materials – Test methods

229 IEC 60455-1:1998, Resin based reactive compounds used for electrical insulation – Part 1:

230 Definitions and general requirements

231 IEC 60455-3 (all parts), Resin based reactive compounds used for electrical insulation – Part

232 3: Specifications for individual materials

233 IEC 60455-3-8:2013, Resin based reactive compounds used for electrical insulation – Part 3:

234 Specifications for individual materials – Sheet 8: Resins for cable accessories

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235 IEC 60695-11-10:2013, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and

236 vertical flame test methods

237 IEC 60814:1997, Insulating liquids – Oil-impregnated paper and pressboard – Determination of

238 water by automatic coulometric Karl Fischer titration

239 IEC 61033:1991, Test methods for the determination of bond strength of impregnating agents

240 to an enamelled wire substrate

241 IEC 61099:2010, Insulating liquids – Specifications for unused synthetic organic esters for

242 electrical purposes

243 ISO 37:2011, Rubber, vulcanized or thermoplastic – Determination of tensile stress-strain

244 properties
245 ISO 62:2008, Plastics – Determination of water absorption

246 ISO 75 (all parts), Plastics and ebonite – Determination of temperature of deflection under load

247 ISO 175:2010, Plastics – Determination of the effects of liquid chemicals, including water

248 239 ISO 178:2010, Plastics – Determination of flexural properties

249 ISO 179-1:2010, Plastics – Determination of Charpy impact properties – Part 1: None

250 instrumented impact test

251 ISO 179-2:1997, Plastics – Determination of Charpy impact properties – Part 2: Instrumented

252 impact test
253 ISO 291, Plastics – Standard atmospheres for conditioning and testing

254 ISO 306:2013, Plastics – Thermoplastic materials – Determination of Vicat softening

255 temperature (VST)
256 ISO 527 (all parts), Plastics – Determination of tensile properties

257 ISO 584:1982, Plastics – Unsaturated polyester resins – Determination of reactivity at 80

258 degrees C (conventional method)
259 ISO 604:2002, Plastics – Determination of compressive properties

260 ISO 868:2003, Plastics and ebonite – Determination of indentation hardness by means of a

261 durometer (Shore hardness)

262 ISO 1183-1:2012, Plastics – Methods for determining the density of non-cellular plastics – Part

263 1: Immersion method, liquid pycnometer method and titration method

264 ISO 1513:2010, Paints and varnishes – Examination and preparation of samples for testing

265 ISO 1523:2002, Paints, varnishes, petroleum and related products – Determination of flashpoint

266 – Closed cup equilibrium method

267 ISO 1675:1985, Plastics – Liquid resins – Determination of density by the pycnometer method

268 ISO 2039-1:1993, Plastics – Determination of hardness – Part 1: Ball indentation method

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269 ISO 2114:1996, Plastics – Unsaturated polyester resins – Determination of partial acid value

270 and total acid value

271 ISO 2431:1993, Paints and varnishes – Determination of flow time by use of flow cups

272 ISO 2535:1997, Plastics – Unsaturated polyester resins – Measurement of gel time at 25

273 degrees C

274 ISO 2554:1997, Plastics – Unsaturated polyester resins – Determination of hydroxyl value

275 ISO 2555:1989, Plastics – Resins in the liquid state or as emulsions or dispersions –

276 Determination of apparent viscosity by the Brookfield test method

277 ISO 2592:1973, Petroleum products – Determination of flash and fire points – Cleveland open

278 cup method

279 ISO 3001:1997, Plastics – Epoxide compounds – Determination of epoxide equivalent

280 ISO 3219:1993, Plastics – Polymers/resins in the liquid state or as emulsions or dispersions –

281 Determination of viscosity using a rotational viscometer with defined shear rate

282 ISO 3451-1:1997, Plastics – Determination of ash – Part 1: General methods

283 ISO 3521:1997, Plastics – Unsaturated polyester and epoxy resins – Determination of overall

284 volume shrinkage

285 ISO 3679:1983, Paints, varnishes, petroleum and related products – Determination of flashpoint

286 – Rapid equilibrium method

287 ISO 4573:1978, Plastics – Epoxide resins and glycidyl esters – Determination of inorganic

288 chlorine

289 ISO 4583:1998, Plastics – Epoxide resins and related materials – Determination of easily

290 saponifiable chlorine

291 ISO 4615:1979, Plastics – Unsaturated polyesters and epoxide resins – Determination of total

292 chlorine content

293 ISO 4625:1980, Binders for paints and varnishes – Determination of softening point – Ring-and-

294 ball method

295 ISO 4895, Plastics – Liquid epoxy resins – Determination of tendency to crystallize

296 ISO 7056, Plastics laboratory ware – Beakers

297 ISO 9396:1997, Plastics – Phenolic resins – Determination of the gel time at a given

298 temperature using automatic apparatus

299 ISO 11357-2:1999; Plastics – Differential scanning calorimetry (DSC) – Part 2: Determination

300 of glass transition temperature

301 ISO 11359-2:1999, Plastics – Thermomechanical analysis (TMA) – Part 2: Determination of

302 coefficient of linear thermal expansion and glass transition temperature

303 ISO 11359-3:2002, Plastics – Thermomechanical analysis (TMA) – Part 3: Determination of

304 penetration temperature
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305 ISO 14896:2009, Plastics – Polyurethane raw materials – Determination of isocyanate content

306 ISO 15528:2000, Paints, varnishes and raw materials for paints and varnishes – Sampling

307 3 Terms and definitions

308 For the purposes of this document, the terms and definitions given in IEC 60455-1 and IEC

309 60050 shall apply.
310 ISO and IEC maintain terminology databases for use
...