IEC 61212-2:2006

Insulating materials - Industrial rigid round laminated tubes and rods based on thermosetting resins for electrical purposes - Part 2: Methods of test

IEC 61212-2:2006 describes methods of test for the materials defined in IEC 61212-1. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application should be based on the actual requirements necessary for adequate performance in that application and not based on this specification alone. The main changes from the previous edition are as follows: added application use and safety statements. Reformatted document to bring it up to current IEC document format. Test method references updated.

Matériaux isolants - Tubes et barres industriels rigides, ronds, stratifiés, à base de résines thermodurcissables, à usages électriques - Partie 2: Méthodes d'essai

La CEI 61212-2:2006 décrit les méthodes d'essai des matériaux définis dans la CEI 61212-1. Les matériaux qui sont conformes à cette spécification satisfont à des niveaux de performances établis. Cependant, il convient que le choix d'un matériau par un utilisateur et pour une application particulière soit fondé sur les exigences réelles nécessaires pour obtenir les performances satisfaisantes pour cette application, et non pas fondé sur cette seule spécification. Les principales modifications suivantes ont été apportées par rapport à l'édition précédente: ajout d'instructions liées à l'utilisation et à la sécurité de l'application. Le document a été reformaté pour tenir compte du format en cours des documents CEI. Les références à la méthode d'essai ont été mises à jour.

General Information

• Status: Published
• Publication Date: 09-Apr-2006
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.035.01 - Insulating materials in general
• Technical Committee: TC 15 - Solid electrical insulating materials
• Drafting Committee: WG 6 - TC 15/WG 6
• Current Stage: PPUB - Publication issued
• Start Date: 15-Jun-2006
• Completion Date: 10-Apr-2006

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 61212-2
Second edition
2006-04
Insulating materials –
Industrial rigid round laminated tubes
and rods based on thermosetting resins
for electrical purposes –
Part 2:
Methods of test
Reference number
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,

edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
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thus ensuring that the content reflects current technology. Information relating to
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INTERNATIONAL IEC
STANDARD 61212-2
Second edition
2006-04
Insulating materials –
Industrial rigid round laminated tubes
and rods based on thermosetting resins
for electrical purposes –
Part 2:
Methods of test
 IEC 2006  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale S
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61212-2  IEC:2006(E)
CONTENTS
FOREWORD.3

INTRODUCTION.5

1 Scope.6

2 Normative references .6

3 Conditioning of specimens.7

4 Dimensions .7

4.1 General .7
4.2 External diameter .7
4.3 Internal diameter .8
4.4 Wall thickness .9
4.5 Departure from straightness – Applicable to all tubes up to 300 mm diameter .10
5 Mechanical tests.10
5.1 Flexural strength perpendicular to laminations.10
5.2 Axial compressive strength.12
5.3 Cohesion between layers .14
6 Electrical tests.15
6.1 Electric strength and breakdown voltage .15
6.2 Insulation resistance after immersion in water .17
6.3 Dissipation factor and permittivity (tube only) .18
7 Other tests .18
7.1 Thermal endurance .18
7.2 Water absorption.19
7.3 Density.19
7.4 Flammability.19
BIBLIOGRAPHY .22

Figure 1 – Preparation of test specimen from a large tube for testing flexural strength.11
Figure 2 – Position of tube in testing machine for testing cohesion between layers .14
Figure 3 – Test specimens and electrodes for testing electric strength of tubes .17
Figure 4 – Test specimens for flammability testing.20

61212-2  IEC:2006(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

___________
INSULATING MATERIALS –
INDUSTRIAL RIGID ROUND LAMINATED TUBES
AND RODS BASED ON THERMOSETTING RESINS

FOR ELECTRICAL PURPOSES –
Part 2: Methods of test
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61212-2 has been prepared by IEC technical committee 15:
Standards on specifications for electrical insulating materials.
This second edition cancels and replaces the first edition published in 1995 and
constitutes a technical revision.
The main changes from the previous edition are as follows: added application use and
safety statements. Reformatted document to bring it up to current IEC document format. Test
method references updated.
– 4 – 61212-2  IEC:2006(E)
The text of this standard is based on the following documents:

FDIS Report on voting
15/273/FDIS 15/306/RVD
Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A bilingual version of this publication may be issued at a later date.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61212-2  IEC:2006(E) – 5 –
INTRODUCTION
This part of IEC 61212 is one of a series which deals with industrial, rigid, round, laminated

tubes and rods based on thermosetting resins for electrical purposes. The materials are

similar to those described in IEC 62011-1 but of different cross-section.

This series, under the general heading Insulating materials – Industrial rigid round laminated

tubes and rods based on thermosetting resins for electrical purposes, consists of three parts:

Part 1: Definitions, designations and general requirements (IEC 61212-1)

Part 2: Methods of test (IEC 61212-2)

Part 3: Specifications for individual materials (IEC 61212-3)

– 6 – 61212-2  IEC:2006(E)
INSULATING MATERIALS –
INDUSTRIAL RIGID ROUND LAMINATED TUBES

AND RODS BASED ON THERMOSETTING RESINS

FOR ELECTRICAL PURPOSES –
Part 2: Methods of test
1 Scope
This part of IEC 61212 describes methods of test for the materials defined in IEC 61212-1.
Materials which conform to this specification meet established levels of performance.
However, the selection of a material by a user for a specific application should be based on
the actual requirements necessary for adequate performance in that application and not
based on this specification alone.
Safety warning:
It is the responsibility of the user of the methods contained or referred to in this document to
ensure that they are used in a safe manner.
2 Normative references
The 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 60167:1964, Methods of test for the determination of the insulation resistance of solid
insulating materials
IEC 60212:1971, Standard conditions for use prior to and during the testing of solid electrical
insulating materials
IEC 60216-1:2001, Electrical insulating materials – Properties of thermal endurance – Part 1:
Ageing procedures and evaluation of test results
IEC 60216-2:2005, Electrical insulating materials – Thermal endurance properties – Part 2:

Determination of thermal endurance properties of electrical insulating materials – Choice of
test criteria
IEC 60243-1:1998, Electrical strength of insulating materials – Test methods – Part 1: Tests
at power frequencies
IEC 60250:1969, Recommended methods for the determination of the permittivity and
dielectric dissipation factor of electrical insulating materials at power, audio and radio
frequencies including metre wavelengths
IEC 60296:2003, Fluids for electrotechnical applications – Unused mineral oils for trans-
formers and switchgear
61212-2  IEC:2006(E) – 7 –
IEC 60695-11-10:1999, Fire hazard testing – Part 11-10: Test flames – 50 W horizontal and

vertical flame test methods
Amendment 1 (2003)
IEC 61212-1, Insulating materials – Industrial rigid round laminated tubes and rods based on

thermosetting resins for electrical purposes – Part 1: General requirements

IEC 61212-3 (all sheets), Insulati
...

IEC 61212-2 ®
Edition 2.0 2006-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulating materials – Industrial rigid round laminated tubes and rods based on
thermosetting resins for electrical purposes –
Part 2: Methods of test
Matériaux isolants – Tubes et barres industriels rigides, ronds, stratifiés, à base
de résines thermodurcissables, à usages électriques –
Partie 2: Méthodes d’essai
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IEC 61212-2 ®
Edition 2.0 2006-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Insulating materials – Industrial rigid round laminated tubes and rods based on
thermosetting resins for electrical purposes –
Part 2: Methods of test
Matériaux isolants – Tubes et barres industriels rigides, ronds, stratifiés, à base
de résines thermodurcissables, à usages électriques –
Partie 2: Méthodes d’essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
S
CODE PRIX
ICS 29.035.01 ISBN 978-2-88910-446-8
– 2 – 61212-2 © IEC:2006
CONTENTS
FOREWORD.3
INTRODUCTION.5
1 Scope.6
2 Normative references .6
3 Conditioning of specimens.7
4 Dimensions .7
4.1 General .7
4.2 External diameter .7
4.3 Internal diameter .8
4.4 Wall thickness .9
4.5 Departure from straightness – Applicable to all tubes up to 300 mm diameter .10
5 Mechanical tests.10
5.1 Flexural strength perpendicular to laminations.10
5.2 Axial compressive strength.12
5.3 Cohesion between layers .13
6 Electrical tests.15
6.1 Electric strength and breakdown voltage .15
6.2 Insulation resistance after immersion in water .17
6.3 Dissipation factor and permittivity (tube only) .17
7 Other tests .18
7.1 Thermal endurance .18
7.2 Water absorption.18
7.3 Density.18
7.4 Flammability.18
Bibliography.22

Figure 1 – Preparation of test specimen from a large tube for testing flexural strength.11
Figure 2 – Position of tube in testing machine for testing cohesion between layers .14
Figure 3 – Test specimens and electrodes for testing electric strength of tubes .16
Figure 4 – Test specimens for flammability testing.20

61212-2 © IEC:2006 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
INSULATING MATERIALS –
INDUSTRIAL RIGID ROUND LAMINATED TUBES
AND RODS BASED ON THERMOSETTING RESINS
FOR ELECTRICAL PURPOSES –
Part 2: Methods of test
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of 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, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61212-2 has been prepared by IEC technical committee 15:
Standards on specifications for electrical insulating materials.
This second edition cancels and replaces the first edition published in 1995 and
constitutes a technical revision.
The main changes from the previous edition are as follows: added application use and
safety statements. Reformatted document to bring it up to current IEC document format. Test
method references updated.
– 4 – 61212-2 © IEC:2006
This bilingual version, published in 2009-06, corresponds to the English version.
The text of this standard is based on the following documents:
FDIS Report on voting
15/273/FDIS 15/306/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
61212-2 © IEC:2006 – 5 –
INTRODUCTION
This part of IEC 61212 is one of a series which deals with industrial, rigid, round, laminated
tubes and rods based on thermosetting resins for electrical purposes. The materials are
similar to those described in IEC 62011-1 but of different cross-section.
This series, under the general heading Insulating materials – Industrial rigid round laminated
tubes and rods based on thermosetting resins for electrical purposes, consists of three parts:
Part 1: Definitions, designations and general requirements (IEC 61212-1)
Part 2: Methods of test (IEC 61212-2)
Part 3: Specifications for individual materials (IEC 61212-3)

– 6 – 61212-2 © IEC:2006
INSULATING MATERIALS –
INDUSTRIAL RIGID ROUND LAMINATED TUBE
...