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
Resin based reactive compounds used for electrical insulation -- Part 3: Specifications for individual materials -- Sheet 3: Unfilled polyurethane compounds
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 %.
Reaktionsharzmassen für die Elektroisolierung -- Teil 3: Anforderungen an einzelne Werkstoffe -- Blatt 3: Ungefüllte Polyurethanharzmassen
Composés réactifs à base de résines utilisés comme isolants électriques -- Partie 3: Spécifications pour matériaux particuliers -- Feuille 3: Composés résineux de polyuréthanne non chargés
Contient les exigences pour les composés résineux de polyuréthanne non chargés à l'état durci ou polymérisé, destinés aux catégories PUR-U-4 à PUR-U-8, dont la teneur en cendres n'est pas supérieure à 6 %.
Reaktivne 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)
General Information
- 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
Relations
- Effective Date
- 07-Jun-2022
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 13-May-2010
Overview
SIST EN 60455-3-3:2004 specifies the requirements for unfilled polyurethane resin-based reactive compounds in the cured form, intended for use as electrical insulation. Covering PUR-U-4 to PUR-U-8 classes, the standard ensures that these polyurethane compounds have an ash content of not more than 6%. Developed by the Slovenski inštitut za standardizacijo (SIST), this European standard aligns with IEC 60455-3-3:2003 and is adopted widely for ensuring reliable and durable insulation systems in electrical engineering applications.
Key Topics
- Compound Specifications: Details the criteria for selecting unfilled polyurethane resinous compounds, focusing on electrical insulating purposes. Specifies performance characteristics such as density, tensile strength, flexural strength, elongation at break, impact resistance, hardness, water absorption, and volume resistivity.
- Test Methods: Refers to standardized test methods from IEC 60455-2 for evaluating key properties in both cured and uncured forms. Testing covers aspects like density, viscosity, shelf life, mechanical strength, dielectric properties, and hydrolytic stability.
- Material Classes: Covers PUR-U-4 to PUR-U-8, each with defined minimum and maximum characteristic values suited to particular application needs and environmental conditions, ensuring flexibility and suitability across various sectors.
- Quality Assurance: Requires that the ash content does not exceed 6%, ensuring material purity and preserving insulating performance over time.
Applications
Unfilled polyurethane compounds described in SIST EN 60455-3-3:2004 play a critical role in modern electrical insulation systems. Key application areas include:
- Electrical and Electrotechnical Equipment: Used in insulating components such as transformers, switchgear, cable joints, and splices, where high dielectric strength and long-term durability are essential.
- Industrial Power Systems: Suitable for encapsulation and potting of sensitive electronic assemblies, protecting them from moisture, mechanical impact, and electrical stress.
- Renewable Energy Installations: Utilized in wind, solar, and hydroelectric power infrastructure for reliable and resilient insulation under varying environmental conditions.
- Transportation and Infrastructure: Applied in railway signaling, automotive electrical systems, and critical public infrastructure where robust insulation is necessary to ensure safety and reliability.
- General Electrical Manufacturing: Frequently used by original equipment manufacturers (OEMs) for producing high-quality, consistent, and compliant insulating materials.
Related Standards
For optimal use and implementation, SIST EN 60455-3-3:2004 is referenced alongside several related international standards, which provide complementary guidelines on testing and material specification:
- IEC 60455-1 - Definitions and general requirements for resin-based reactive compounds used for electrical insulation.
- IEC 60455-2 / EN 60455-2 - Methods of test for resin-based reactive compounds, providing standardized procedures to assess performance and suitability.
- HD 307.2 S1:1986 (now replaced by EN 60455-2:1999) - Earlier standard covering methods of test for insulation materials.
- Other Polyurethane Compound Standards - Specifications sheets within IEC 60455-3 series for filled and composite polyurethane compounds.
Practical Value
By following the requirements in SIST EN 60455-3-3:2004, manufacturers and users of electrical insulation materials can:
- Enhance product reliability by ensuring consistent material quality and performance.
- Meet international compliance for export, tendering, and multi-region projects.
- Reduce operational risks associated with insulation failure, moisture ingress, or electrical short circuits.
- Streamline quality control and procurement processes with clear, testable criteria.
The adoption of this standard ensures the development and application of high-performance, unfilled polyurethane compounds, delivering robust electrical isolation and safety across diverse industry needs.
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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 60455-2:2016, 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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