IEC 60216-4-1:2006

INTERNATIONAL IEC
STANDARD 60216-4-1
Fourth edition
2006-01
Electrical insulating materials –
Thermal endurance properties –
Part 4-1:
Ageing ovens –
Single-chamber ovens
Reference number
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INTERNATIONAL IEC
STANDARD 60216-4-1
Fourth edition
2006-01
Electrical insulating materials –
Thermal endurance properties –
Part 4-1:
Ageing ovens –
Single-chamber ovens
 IEC 2006  Copyright - all rights reserved
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– 2 – 60216-4-1  IEC:2006(E)
CONTENTS
FOREWORD.3

1 Scope.5
2 Normative references .5
3 Terms and definitions .5
4 Constructional requirements .7
4.1 General .7
4.2 Mechanical requirements.7
4.3 Ventilation .7
4.4 Specimen mounting arrangements .8
4.5 Temperature control and indicator systems .8
5 Performance requirements .8
5.1 Temperature.8
5.2 Temperature difference and temperature fluctuation.9
5.3 Temperature variation .9
5.4 Maximum temperature deviation.9
5.5 Rate of ventilation .9
5.6 Exposure volume.9
5.7 Time constant.10
6 Test methods and procedure .10
6.1 General .10
6.2 Exposure volume.10
6.3 Temperature and related parameters.10
6.4 Rate of ventilation .11
6.5 Time constant.12
7 Report .12
8 Conditions of use and instructions for in-service monitoring by the user .13
8.1 Conditions of use .13
8.2 Procedure .13
8.3 In-service monitoring .13

Annex A (informative) Test method to determine the rate of ventilation .14
Annex B (informative) Examples for calculation of temperature deviation.16

Bibliography.17

Table 1 – Maximum allowable temperature differences and temperature fluctuations.9
Table 2 – Maximum allowable temperature variation .9

60216-4-1  IEC:2006(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSULATING MATERIALS –
THERMAL ENDURANCE PROPERTIES –

Part 4-1: Ageing ovens –
Single-chamber ovens
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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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 60216-4-1 was prepared by subcommittee 15E: Methods of test, of
IEC technical committee 15: Insulating materials, which has now been merged with IEC
technical committee 98: Electrical insulation systems into IEC technical committee 112:
Evaluation and qualification of electrical insulating materials and systems (provisional title).
This fourth edition of IEC 60216-4-1 cancels and replaces the third edition, published in 1990,
and constitutes a technical revision.
The main changes with regard to the previous edition is that this edition adapts IEC 60216-4-1
to the technical content and the editorial form of IEC 60216-4-2 and IEC 60216-4-3. In
addition, errors and omissions in the third edition have been corrected.

– 4 – 60216-4-1  IEC:2006(E)
The text of this standard is based on the following documents:
FDIS Report on voting
112/16/FDIS 112/23/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.
IEC 60216, under the general title Electrical insulating materials – Thermal endurance
properties, is composed of several parts:
Part 1: Ageing procedures and evaluation of test results
Part 2: Determination of thermal endurance properties of electrical insulating materials –
Choice of test criteria
Part 3: Instructions for calculating thermal endurance characteristics
Part 4-1: Ageing ovens – Single-chamber ovens
Part 4-2: Ageing ovens – Precision ovens for use up to 300 °C
Part 4-3: Ageing ovens – Multi-chamber ovens
Part 5: Determination of relative thermal endurance index (RTE) of an insulating material
Part 6: Determination of thermal endurance indices (TI and RTE) of an insulating material
using the fixed time frame method
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.

___________
For revisions and new parts, see the current catalogue of IEC publications for an up-to-date list.

60216-4-1  IEC:2006(E) – 5 –
ELECTRICAL INSULATING MATERIALS –
THERMAL ENDURANCE PROPERTIES –

Part 4-1: Ageing ovens –
Single-chamber ovens
1 Scope
This part of IEC 60216 covers minimum requirements for ventilated and electrically heated
single-chamber ovens, with or without forced gas circulation, for thermal endurance
evaluation of electrical insulation. It covers ovens designed to operate over all or part of the
temperature range from 20 °C above ambient to 500 °C. It gives acceptance tests and in-
service monitoring tests for these ageing ovens.
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.
ISO/IEC 17025:2005 General requirements for the competence of testing and calibration
laboratories
IEC 60335 (all parts), Household and similar electrical appliances – Safety
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
rate of ventilation
N
number of air changes per hour in the exposure chamber at room temperature
3.2
exposure volume
that central part of the exposure chamber that meets the requirements for temperature
fluctuation, temperature difference and temperature variation
3.3
exposure temperature
T
temperature selected for ageing test specimens to obtain data for the determination of effects
of temperature
NOTE See also “global exposure temperature”.
3.4
temperature fluctuation
δT
maximum change in temperature at one point in the exposure volume over a period of time
...