SIST EN 60464-3-2:2002

Varnishes used for electrical insulation -- Part 3: Specifications for individual materials -- Sheet 2: Hot curing impregnating varnishes

This sheet specifies requirements for hot curing impregnating varnishes and includes requirements for certain properties at elevated temperatures.

Elektroisolierlacke -- Teil 3: Bestimmungen für einzelne Materialien -- Blatt 2: Heißhärtende Tränklacke

Vernis utilisés pour l'isolation électrique -- Partie 3: Spécifications pour matériaux particuliers -- Feuille 2: Vernis d'imprégnation durcissant à chaud

This sheet specifies requirements for hot curing impregnating varnishes and includes requirements for certain properties at elevated temperatures.

Varnishes used for electrical insulation - Part 3: Specifications for individual materials - Sheet 2: Hot curing impregnating varnishes (IEC 60464-3-2:2001)

General Information

• Status: Published
• Publication Date: 30-Sep-2002
• ICS: 29.035.60 - Varnished fabrics
• Technical Committee: IZO - Insulating materials
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Oct-2002
• Due Date: 01-Oct-2002
• Completion Date: 01-Oct-2002
• Ref Project: EN 60464-3-2:2001 - Varnishes used for electrical insulation - Part 3: Specifications for individual materials - Sheet 2: Hot curing impregnating varnishes

Relations

• Refers: SIST EN 60317-13:2001 - Specifications for particular types of winding wires -- Part 13: Polyester or polyesterimide overcoated with polyamide-imide enamelled round copper wire, class 200
• Effective Date: 03-Feb-2026
• Refers: SIST EN 60317-8:2001 - Specifications for particular types of winding wires -- Part 8: Polyesterimide enamelled round copper wire, class 180
• Effective Date: 03-Feb-2026
• Refers: SIST EN 60172:2001 - Test procedure for the determination of the temperature index of enamelled winding wires
• Effective Date: 03-Feb-2026
• Refers: SIST EN 60464-2:2002 - Varnishes used for electrical insulation -- Part 2: Methods of test
• Effective Date: 03-Feb-2026
• Referred By: SIST EN 60034-18-21:2013 - Rotating electrical machines - Part 18-21: Functional evaluation of insulation systems - Test procedures for wire-wound windings - Thermal evaluation and classification (IEC 60034-18-21:2012)
• Effective Date: 03-Feb-2026
• Referred By: SIST EN IEC 60370:2018 - Test procedure for thermal endurance of insulating resins and varnishes for impregnation purposes - Electric breakdown methods (IEC 60370:2017)
• Effective Date: 03-Feb-2026
• Referred By: SIST EN 60464-1:2001 - Varnishes used for electrical insulation -- Part 1: Definitions and general requirements
• Effective Date: 03-Feb-2026
• Amended By: SIST EN 60464-3-2:2002/A1:2006 - Varnishes used for electrical insulation -- Part 3: Specifications for individual materials -- Sheet 2: Hot curing impregnating varnishes
• Effective Date: 21-Sep-2010

Overview

SIST EN 60464-3-2:2002 - Varnishes used for electrical insulation – Part 3: Specifications for individual materials – Sheet 2: Hot curing impregnating varnishes is a European Standard developed by CLC (CENELEC) and adopted from IEC 60464-3-2:2001. This sheet establishes the requirements for hot curing impregnating varnishes specifically used for electrical insulation applications, particularly focusing on their performance at elevated temperatures.

By defining consistent criteria for hot curing impregnating varnishes, this standard supports quality assurance for manufacturers and users of electrical equipment, ensuring reliable electrical insulation and performance in demanding operational conditions.

Key Topics

• Scope of Application: Details the requirements for varnishes cured at elevated temperatures for use as an impregnating medium in electrical insulation systems.
• Property Requirements: Sets requirements for critical physical and electrical properties, including:
  • Flash point
  • Viscosity
  • Content of non-volatile matter
  • Stability in an open vessel
  • Drying and/or curing in thick layers
  • Effects on enamelled wires
  • Bend and temperature index tests
  • Resistance to solvent vapour
  • Volume resistivity before and after water immersion
• Test Methods: Refers to detailed test procedures described in IEC 60464-2, ensuring standardized evaluation across applications.
• Temperature Classifications: Varnishes are classified according to temperature indices (130, 155, 180, 200, and 220°C), suitable for differing thermal endurance requirements.

Applications

Hot curing impregnating varnishes standardized by SIST EN 60464-3-2:2002 are vital in the electrical insulation of:

• Electric Motors and Generators: Used for insulation of windings to enhance performance and prolong service life under high thermal stress.
• Transformers: Improve insulation reliability and resistance to heat, moisture, and chemicals.
• Coils and Electromagnetic Devices: Provide robust impregnation for windings used in relays, solenoids, and inductors, ensuring electrical and mechanical stability.
• Appliance Manufacturing: Ensures consistency and safety in high-quality electrical devices.

Consistent use of standardized hot curing impregnating varnishes reduces the risk of insulation failure, supports longer maintenance intervals, and enhances the safety and durability of electrical devices across industrial, commercial, and consumer sectors.

Related Standards

For comprehensive insulation system assessment and compatible materials, the following standards are referenced within SIST EN 60464-3-2:2002:

• IEC 60172 / EN 60172: Test procedure for the determination of the temperature index of enamelled winding wires.
• IEC 60317-8 / EN 60317-8: Specifications for polyesterimide enamelled round copper wire, class 180.
• IEC 60317-13 / EN 60317-13: Specifications for polyester or polyesterimide overcoated with polyamide-imide enamelled round copper wire, class 200.
• IEC 60464-1 / EN 60464-1: Varnishes used for electrical insulation – Definitions and general requirements.
• IEC 60464-2 / EN 60464-2: Methods of test for electrical insulating varnishes.
• IEC 61033: Test methods for determination of bond strength of impregnating agents to an enamelled wire substrate.
• IEC 60079-7: Electrical apparatus for explosive gas atmospheres – Increased safety "e".

Practical Value

Implementing SIST EN 60464-3-2:2002 helps manufacturers, quality managers, and testing laboratories to:

• Specify and verify the performance of hot curing impregnating varnishes.
• Ensure compatibility and safety across electrical insulation systems.
• Facilitate compliance with industry standards and regulatory requirements.
• Support international trade and procurement by defining clear quality criteria for electrical varnishes.

By adhering to this standard, stakeholders can achieve high reliability and safety for rotating electrical machines, transformers, and associated equipment requiring hot curing impregnating varnishes.

Keywords: SIST EN 60464-3-2:2002, electrical insulation, hot curing impregnating varnishes, insulating varnish standards, IEC 60464-3-2, thermal endurance, electric motor insulation, transformer varnish, electrical equipment safety, CENELEC standards.

Standards Content (Sample)

SLOVENSKI SIST EN 60464-3-2:2002
prva izdaja
STANDARD
oktober 2002
Varnishes used for electrical insulation - Part 3: Specifications for individual
materials - Sheet 2: Hot curing impregnating varnishes (IEC 60464-3-2:2001)
ICS 29.035.60 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 60464-3-2
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2001
ICS 29.035.01
English version
Varnishes used for electrical insulation
Part 3: Specifications for individual materials
Sheet 2: Hot curing impregnating varnishes
(IEC 60464-3-2:2001)
Vernis utilisés comme isolant électrique Elektroisolierlacke
Partie 3: Spécifications pour matériaux Teil 3: Bestimmungen für einzelne
particuliers Materialien
Feuille 2: Vernis d'imprégnation durcissant Blatt 2: Heißhärtende Tränklacke
à chaud (IEC 60464-3-2:2001)
(CEI 60464-3-2:2001)
This European Standard was approved by CENELEC on 2001-09-01. 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.
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
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60464-3-2:2001 E
Foreword
The text of document 15C/1222/FDIS, future edition 2 of IEC 60464-3-2, 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 60464-3-2 on 2001-09-01.
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) 2002-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2004-09-01
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 60464-3-2:2001 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60464-3-2:2001
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 60172 1987 Test procedure for the determination of EN 60172 1994
the temperature index of enamelled
winding wires
IEC 60317-8 1990 Specifications for particular types of EN 60317-8 1994
winding wires
Part 8: Polyesterimide enamelled round
copper wire, class 180
IEC 60317-13 1990 Part 13: Polyester or polyesterimide EN 60317-13 1994
overcoated with polyamide-imide
enamelled round copper wire, class 200
IEC 60464-1 1998 Varnishes used for electrical insulation EN 60464-1 1999
Part 1: Definitions and general
requirements
IEC 60464-2 2001 Part 2: Methods of test EN 60464-2 2001
IEC 61033 1991 Test methods for the determination of--
bond strength of impregnating agents to
an enamelled wire substrate
NORME CEI
INTERNATIONALE IEC
60464-3-2
INTERNATIONAL
Deuxième édition
STANDARD
Second edition
2001-07
Vernis utilisés pour l'isolation électrique –
Partie 3:
Spécifications pour matériaux particuliers –
Feuille 2: Vernis d’imprégnation durcissant
à chaud
Varnishes used for electrical insulation –
Part 3:
Specifications for individual materials –
Sheet 2: Hot curing impregnating varnishes
 IEC 2001 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: [phone] e-mail: [e-mail] IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
H
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60464-3-2  IEC:2001 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
VARNISHES USED FOR ELECTRICAL INSULATION –
Part 3: Specifications for individual materials –
Sheet 2: Hot curing impregnating varnishes
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
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international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
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6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60464-3-2 has been prepared by subcommittee 15C: Specifications,
of IEC te
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