1、BRITISH STANDARD BS EN 60455-3-3:2003 Resin based reactive compounds used for electrical insulation Part 3: Specifications for individual materials Sheet 3: Unfilled polyurethane compounds The European Standard EN 60455-3-3:2003 has the status of a British Standard ICS 29.035.01 BS EN 60455-3-3:2003
2、 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 1 August 2003 BSI 1 August 2003 ISBN 0 580 42364 6 National foreword This British Standard is the official English language version of EN 60455-3-3:2003. It is identical with IEC 60455-3-3:2003
3、. It supersedes BS 5664-3.3:1995 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee GEL/15, Insulating material, to Subcommittee GEL/15/3, Material specifications, which has the responsibility to: A list of organizations represented on this subcommittee
4、can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search
5、” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obli
6、gations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary
7、of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEURO
8、PEAN STANDARD EN 60455-3-3 NORME EUROPENNE EUROPISCHE NORM July 2003 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELE
9、C - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60455-3-3:2003 E ICS 29.035.01 Supersedes HD 307.3.3 S1:1986English version Resin based reactive compounds used for electrical insulation Part 3: Specifications for individual materials Sh
10、eet 3: Unfilled polyurethane compounds (IEC 60455-3-3:2003) Composs ractifs base de rsines utiliss comme isolants lectriques Partie 3: Spcifications pour matriaux particuliers Feuille 3: Composs rsineux de polyurthanne non chargs (CEI 60455-3-3:2003) Reaktionsharzmassen fr die Elektroisolierung Teil
11、 3: Anforderungen an einzelne Werkstoffe Blatt 3: Ungefllte Polyurethanharzmassen (IEC 60455-3-3:2003) This European Standard was approved by CENELEC on 2003-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European S
12、tandard 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 Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English,
13、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 Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgi
14、um, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 15C/1463/FDIS, future edition 2 of IEC 60455-3-3, prepared by SC 1
15、5C, Specifications, of IEC TC 15, Insulating materials, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60455-3-3 on 2003-06-01. This European Standard replaces HD 307.3.3 S1:1986. References to HD 307.2 S1:1986 have been updated to EN 60455-2:1999. No significant te
16、chnical changes have been made. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2004-03-01 latest date by which the national standards conflicting with the EN have to be withd
17、rawn (dow) 2006-06-01 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60455-3-3:2003 was approved by CENELEC as a European Standard withou
18、t any modification. _ Page2 EN6045533:2003INTRODUCTION This part of IEC 60455 is one of a series which deals with specifications for resin based reactive compounds used for electrical insulation. The series consists of three parts: Part 1: Definitions and general requirements (IEC 60455-1) Part 2: M
19、ethods of test (IEC 60455-2) Part 3: Specifications for individual materials (IEC 60455-3) IEC 60455-3-3 is one of the specification sheets comprising Part 3, as follows: Sheet 3: Unfilled polyurethane compounds Page3 EN6045533:2003RESIN BASED REACTIVE COMPOUNDS USED FOR ELECTRICAL INSULATION Part 3
20、: Specifications for individual materials Sheet 3: Unfilled polyurethane compounds 1 Scope This part of IEC 60455 contains the requirements for unfilled polyurethane resinous compounds in the cured form for classes PUR-U-4 to PUR-U-8 with an ash content of not more than 6 %. 2 Normative references T
21、he following referenced documents are indispensable for the application 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 60455-2:1998, Resin-based reactive compounds u
22、sed for electrical insulation Part 2: Methods of test 3 Requirements The requirements for unfilled polyurethane resinous compounds in the cured form are given in Table 2. If not otherwise specified, the requirements are for (23 2) C. NOTE Materials for use in low temperature conditions may require a
23、dditional tests not specified in this part of IEC 60455 to establish their suitability. 4 Special requirements When any of the following special properties are prescribed in the purchase contract, the method of test given below shall be used. Table 1 Requirements for unfilled polyurethane compounds
24、in the uncured form Property Method of test in IEC 60455-2 Subclause Density 5.2 Viscosity 5.3 Shelf life 5.4 Gel time 5.17 Exothermic temperature peak 5.18 Page4 EN6045533:2003 Table 2 Requirements for unfilled polyurethane compounds in the cured form Method of test according to IEC 60455-2 Require
25、ments for compounds types Properties Subclause Unit Value PUR-U-4 PUR-U-5 PUR-U-6 PUR-U-7 PUR-U-8 Density 5.2 g/cm 3Range 1,10 1,25 1,00 1,20 Flexural strength (3 points) at rupture 6.3.3 MPa Min. 110 100 50 Not applicable Not applicable Tensile strength at rupture 6.3.1 MPa Min. 60 50 25 5 0,5 Elon
26、gation at break 6.3.1 % Min. Not required Not required 5 25 50 Impact strength 6.3.4 kJ/m 2Min. 30 20 10 25 30 Hardness 6.3.5 Shore Min. Not applicable Not applicable D-60 D-20 A-30 30 % compressive yield stress 6.3.2 MPa Min. Not applicable 60 4 8 12 Glass transition temperature 6.4.4.1 C Min. Typi
27、cal values under consideration Temperature of deflection under load 6.4.4.2 C Min. 100 75 Not required Not required Not required Water absorption 6.5.1 mg Max. 30 40 50 80 120 Hydrolytic stability Typical values under consideration Ash content 5.6 % Max. 6 Volume resistivity 6.6.1 cm Min. 1 10 141 1
28、0 1323 C, 48 Hz to 62 Hz Max. 0,01 0,03 0,05 0,10 0,20 Dissipation factor 80 C, 48 Hz to 62 Hz 6.6.2 Max. 0,20 0,30 23 C, 48 Hz to 62 Hz Max. 4 5 6 6 7 Permittivity 80 C, 48 HZ to 62 Hz 6.6.2 Max. 6 7 8 9 10 Electric strength a6.6.3 kV/mm Min. 15 10 Electrolytic corrosion 6.6.5 Not worse than + A, 1
29、,2 Tracking resistance 6.6.4 Min. 300 Not required Thermal endurance by flexural strength to 50 % of initial value b6.4.7 Min. 100 90 Typical values under consideration aThe specimen shall be 3 mm thick and of sufficient area to prevent flashover. bThe value indicated for the temperature indices are
30、 minimum values which can therefore be considerably exceeded and should not be considered as characterizing the category or as being related to the deflection temperature. Page5 EN6045533:2003 Annex ZA (normative) Normative references to international publications with their corresponding European p
31、ublications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
32、of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). NOTE When an international publication has been modified by common modifications, indi
33、cated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60455-2 1998 Resin based reactive compounds used for electrical insulation Part 2: Methods of test EN 60455-2 1999 Page6 EN6045533:2003BS EN 60455-3-3:2003 BSI 389 Chiswick High Road London W4 4AL BSI British Standards
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