IEC 61212-3-2:2006

Insulating materials - Industrial rigid round laminated tubes and rods based on thermosetting resins for electrical purposes - Part 3: Specifications for individual materials - Sheet 2: Round laminated moulded tubes

This part of IEC 61212-3 gives requirements for industrial rigid round laminated moulded tubes for electrical purposes, based on different resins and different reinforcements. 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.

General Information

• Status: Published
• Publication Date: 10-May-2006
• 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: DELPUB - Deleted Publication
• Completion Date: 29-Apr-2013

Relations

• Revised: IEC 61212-3-2:2013 - Insulating materials - Industrial rigid round laminated tubes and rods based on thermosetting resins for electrical purposes - Part 3: Specifications for individual materials - Sheet 2: Round laminated moulded tubes
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 61212-3-2
Second edition
2006-05
Insulating materials –
Industrial rigid round laminated tubes
and rods based on thermosetting resins
for electrical purposes –
Part 3:
Specifications for individual materials –
Sheet 2: Round laminated moulded tubes
Reference number
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INTERNATIONAL IEC
STANDARD 61212-3-2
Second edition
2006-05
Insulating materials –
Industrial rigid round laminated tubes
and rods based on thermosetting resins
for electrical purposes –
Part 3:
Specifications for individual materials –
Sheet 2: Round laminated moulded tubes

 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 M
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61212-3-2  IEC:2006(E)
CONTENTS
FOREWORD.3
INTRODUCTION.5

1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Designations and abbreviations .7
4.1 General .7
4.2 Designation .7
4.3 Abbreviations .7
5 Requirements .8

Table 1 – Types of industrial round moulded tubes .8
Table 2 – External and internal diameters of round moulded tubes.9
Table 2a – Permissible deviation from nominal external diameter of round moulded
tubes in the “as moulded" condition .9
Table 2b – Permissible deviation from nominal external diameter of moulded tubes in
ground or turned condition, all types .9
Table 3 – Permissible deviation from nominal internal diameter of moulded tubes .10
Table 4 – Tolerance on wall thickness for round moulded tubes.10
Table 5 – Departure from straightness for round moulded tubes .11
Table 6 – Property requirements for round moulded tubes .12
Table 7 – Electric strength at 90 °C in oil, perpendicular to laminations for laminated
tubes (1 min proof test or 20 s step-by-step test) (kV/mm) .13

61212-3-2  IEC:2006(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
INSULATING MATERIALS –
INDUSTRIAL RIGID ROUND LAMINATED TUBES
AND RODS BASED ON THERMOSETTING RESINS
FOR ELECTRICAL PURPOSES –
Part 3: Specifications for individual materials -
Sheet 2: Round laminated moulded tubes

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
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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 61212-3-2 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. New types EP GC 23 and PF CC 24 added and type PF CP 24 removed.

– 4 – 61212-3-2  IEC:2006(E)
The text of this standard is based on the following documents:
FDIS Report on voting
15/303FDIS 15/327/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 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.
A bilingual version of this publication may be issued at a later date.

61212-3-2  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.
This series 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)
IEC 61212-3-2 contains one of the specification sheets comprising Part 3, as follows:
Sheet 2: Round laminated moulded tubes.

– 6 – 61212-3-2  IEC:2006(E)
INSULATING MATERIALS –
INDUSTRIAL RIGID ROUND LAMINATED TUBES
AND RODS BASED ON THERMOSETTING RESINS
FOR ELECTRICAL PURPOSES –
Part 3: Specifications for individual materials -
Sheet 2: Round laminated moulded tubes

1 Scope
This part of IEC 61212-3 gives requirements for industrial rigid round laminated moulded
tubes for electrical purposes, based on different resins and different reinforcements.
Applications and distinguishing properties are given in Table 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 61212-1:2006, Insulating materials – Industrial rigid round laminated tubes and rods
based on thermosetting resins for electrical purposes – Part 1: Definitions, designations and
general requirements
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
ISO 472, Plastics – Vocabulary
3 Terms and definitions
For the purposes of this document, the following modified definition, which is taken from
ISO 472, applies.
3.1
moulded tube (as applied to thermosets)
tube formed by rolling impregnated layers of material on a mandrel, curing the assembly in a
cylindrical mould under heat and pressure, and then removing the mandrel
[ISO 472, MOD]
61212-3-2  IEC:2006(E) – 7 –
4 Designations and abbreviations
4.1 General
The moulded tubes covered by this Part of IEC 61212-3 sheet are classified into types which
differ in the resin and reinforcement used, the method of manufacture and their distinguishing
properties.
4.2 Designation
Individual types are designated by
– a two-letter abbreviation denoting the resin;
– a second two-letter abbreviation, denoting the reinforcement;
– a serial number of two digits,
the first digit denoting the form of the material, a “3” indicates moulded tubes,
and, a second digit denoting sub-grades of the same type.
The abbreviations are given in 4.3.
The complete designation of the moulded tube is denoted as follows:
– description: moulded tube;
– number of the IEC standard: IEC 61212–3–2;
– designation of the individual type;
– dimensions (in millimetres) of the moulded tube: internal diameter x external diameter x
length;
–   a letter designating the finish on the external diameter of the moulded tube:
"A" designating moulded tubes in the "as produced" condition;
"B" designating moulded tubes in ground or turned condition.
EXAMPLE:
Moulded tube, IEC 61212-3-2 – EP CC 31 – 25x35x1000-A
4.3 Abbreviations
Types of resin Types of reinforcement
EP Epoxy (epoxide) CC Woven cotton cloth
PF Phenolic CP Cellulosic paper

– 8 – 61212-3-2  IEC:2006(E)
5 Requirements
In addition to the general requirements given in IEC 6121
...