SIST EN 60455-3-3:2004
(Main)Resin based reactive compounds used for electrical insulation -- Part 3: Specifications for individual materials -- Sheet 3: Unfilled polyurethane compounds
- Abstract
Gives 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 %.
- Status
- Published
- Publication Date
- 31-Aug-2004
- Technical Committee
- IZO - Insulating materials
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Sep-2004
- Due Date
- 01-Sep-2004
- Completion Date
- 01-Sep-2004
SIST EN 60455-3-3:2004 is the Slovenian adoption of EN 60455-3-3 for resin based reactive compounds used for electrical insulation. It specifies requirements for unfilled polyurethane resinous compounds in the cured form, for classes PUR-U-4 to PUR-U-8, with ash content not more than 6 %. It is a material specification for manufacturers, purchasers, and test laboratories that need to define, test, or buy this kind of insulation compound.
What does SIST EN 60455-3-3:2004 specify?
SIST EN 60455-3-3:2004 specifies the requirements for one family of electrical insulation materials within the IEC 60455 series. The document focuses on unfilled polyurethane compounds and organizes the material rules into clauses for scope, normative references, requirements, and special requirements, plus Annex ZA.
Clause 1 sets the subject and the material classes covered. Clause 2 points to the test method standard used with the sheet. Clause 3 gives the main cured-form requirements, and Clause 4 covers extra properties that are only checked when a purchase contract calls for them.
Annex ZA gives the normative reference list and the European publication equivalent for the cited international publication.
What are the key requirements of SIST EN 60455-3-3:2004?
The key requirements are given mainly in Clause 3 and Clause 4, with the detailed property limits in Tables 1 and 2. In practice, this is the part that tells a buyer or laboratory what to measure and which compound class the results must match.
Main points that matter in use
- Material class and form - Clause 1 covers cured unfilled polyurethane resinous compounds for classes PUR-U-4 to PUR-U-8. That means the sheet is for finished, hardened material rather than only for raw mix handling.
- General test conditions - Clause 3 states that the requirements apply at (23 ± 2) °C unless otherwise specified. If a product will work at low temperature, the note says extra testing may be needed.
- Uncured special properties - Clause 4 and Table 1 link optional purchase-contract properties to test methods in IEC 60455-2, including density, viscosity, shelf life, gel time, and exothermic temperature peak. This helps control processing behavior before curing.
- Mechanical performance after cure - Table 2 covers flexural strength, tensile strength, elongation at break, impact strength, hardness, and compressive yield stress. These are the properties that matter when the compound is used in load-bearing or stressed insulation parts.
- Thermal behavior - Table 2 includes glass transition temperature, temperature of deflection under load, hydrolytic stability, and thermal endurance by flexural strength retention. These properties are important when the material sees heat, moisture, or long service life.
- Electrical performance - Table 2 includes volume resistivity, dissipation factor, permittivity, electric strength, electrolytic corrosion, and tracking resistance. These are the checks that show whether the cured compound can act as an electrical insulator under service stress.
- Ash content limit - The scope limits ash content to not more than 6 %. In practice, this helps distinguish the material family and supports control of composition and purity.
What terms does SIST EN 60455-3-3:2004 define?
- PUR-U-4 to PUR-U-8 - The compound classes covered by this sheet, each with its own set of cured-form requirements in Table 2.
- Ash content - The residue limit used to characterize the cured material and distinguish the covered compounds.
- Shelf life - The period during which the uncured material remains usable before processing.
- Gel time - The time needed for the reactive compound to reach gelation during cure.
- Exothermic temperature peak - The highest temperature reached during curing, which matters for safe processing and thermal control.
- Tracking resistance - The ability of the cured insulating surface to resist conductive tracking under electrical stress.
- Thermal endurance - The ability of the material to retain flexural strength after heat ageing.
Who uses SIST EN 60455-3-3:2004?
SIST EN 60455-3-3:2004 is used by makers of electrical insulation compounds, buyers writing purchase contracts, and laboratories performing material tests. It is also relevant to quality managers who need acceptance criteria for incoming material or product release.
It is most useful when a team needs to compare a polyurethane insulation compound against a named class, specify extra uncured properties, or check whether the cured material meets mechanical, thermal, and electrical needs.
What changed in SIST EN 60455-3-3:2004 from the previous edition?
This European Standard replaces HD 307.3.3 S1:1986. The foreword says references to HD 307.2 S1:1986 were updated to EN 60455-2:1999, and that no significant technical changes were made. The IEC foreword also describes this as a second edition and a minor revision.
Which standards are used with SIST EN 60455-3-3:2004?
- IEC 60455-2:1998 - Provides the methods of test used throughout the sheet.
- EN 60455-2:1999 - The European publication equivalent listed in Annex ZA for the test methods reference.
- IEC 60455-1 - The series part for definitions and general requirements, named in the introduction.
- IEC 60455-3 - The parent part for specifications for individual materials, of which this sheet is one.
What does the SIST EN 60455-3-3:2004 document contain?
The document contains a short set of clauses and two requirement tables. Table 1 links optional uncured-form properties to IEC 60455-2 test methods, and Table 2 gives the property set for the cured form by compound type. Annex ZA maps the normative reference to the corresponding European publication.
It is therefore a requirements sheet for specification, testing, and procurement, not a general handbook. The content is focused on classifying the material, choosing the right test methods, and comparing results against the listed property set.
Relations
- Effective Date
- 07-Jun-2022
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 13-May-2010
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Frequently Asked Questions
SIST EN 60455-3-3:2004 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Resin based reactive compounds used for electrical insulation -- Part 3: Specifications for individual materials -- Sheet 3: Unfilled polyurethane compounds". This standard covers: Gives 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 %.
Gives 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 %.
SIST EN 60455-3-3:2004 is classified under the following ICS (International Classification for Standards) categories: 29.035.20 - Plastics and rubber insulating materials. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 60455-3-3:2004 has the following relationships with other standards: It is inter standard links to SIST HD 307.3.3 S1:1998, SIST EN 60455-2:2002, SIST EN IEC 60455-2:2024, SIST HD 307.3.3 S1:1998. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 60455-3-3:2004 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
STANDARDReaktivne zmesi na osnovi smole, ki se uporabljajo za električno izolacijo - 3. del: Specifikacije za posamezne materiale - 3. list: Nepolnjene poliuretanske zmesi (IEC 60455-3-3:2003)Resin based reactive compounds used for electrical insulation - Part 3: Specifications for individual materials - Sheet 3: Unfilled polyurethane compounds (IEC 60455-3-3:2003)©
Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljenoReferenčna številkaSIST EN 60455-3-3:2004(en)ICS29.035.20
EUROPEAN STANDARD
EN 60455-3-3 NORME EUROPÉENNE EUROPÄISCHE NORM
July 2003 CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2003 CENELEC - 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 S1:1986
English version
Resin based reactive compounds used for electrical insulation Part 3: Specifications for individual materials Sheet 3: Unfilled polyurethane compounds (IEC 60455-3-3:2003)
Composés réactifs à base de résines utilisés comme isolants électriques Partie 3: Spécifications pour matériaux particuliers Feuille 3: Composés résineux
de polyuréthanne non chargés (CEI 60455-3-3:2003)
Reaktionsharzmassen für die Elektroisolierung Teil 3: Anforderungen an einzelne Werkstoffe Blatt 3: Ungefüllte 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 Standard 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, 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, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom.
The text of document 15C/1463/FDIS, future edition 2 of IEC 60455-3-3, prepared by SC 15C, 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 technical 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 withdrawn
(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 without any modification. __________
- 3 - EN 60455-3-3:2003
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications 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 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, indicated 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
NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD60455-3-3Deuxième éditionSecond edition2003-04Composés réactifs à base de résinesutilisés comme isolants électriques –Partie 3:Spécifications pour matériaux particuliers –Feuille 3:Composés résineux de polyuréthannenon chargésResin based reactive compoundsused for electrical insulation –Part 3:Specifications for individual materials –Sheet 3:Unfilled polyurethane compoundsPour prix, voir catalogue en vigueurFor price, see current catalogue IEC 2003
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Copyright - all rights reservedAucune partie de cette publication ne peut être reproduite niutilisée sous quelque forme que ce soit et par aucun procédé,électronique ou mécanique, y compris la photocopie et lesmicrofilms, sans l'accord écrit de l'éditeur.No part of this publication may be reproduced or utilized in anyform or by any means, electronic or mechanical, includingphotocopying and microfilm, without permission in writing fromthe publisher.International Electrotechnical Commission,
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Telefax: +41 22 919 03 00
E-mail: inmail@iec.ch
Web: www.iec.chCODE PRIXPRICE CODEECommission Electrotechnique InternationaleInternational Electrotechnical Commission
60455-3-3 IEC:2003– 3 –INTERNATIONAL ELECTROTECHNICAL COMMISSION___________RESIN BASED REACTIVE COMPOUNDS USEDFOR ELECTRICAL INSULATION –Part 3: Specifications for individual materials –Sheet 3: Unfilled polyurethane compoundsFOREWORD1)The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprisingall national electrotechnical committees (IEC National Committees). The object
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