IEC 60243-3:2013

IEC 60243-3 ®
Edition 3.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric strength of insulating materials – Test methods –
Part 3: Additional requirements for 1,2/50 µs impulse tests

Rigidité diélectrique des matériaux isolants – Méthodes d’essai –
Partie 3: Exigences complémentaires pour les essais
aux ondes de choc 1,2/50 µs
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IEC 60243-3 ®
Edition 3.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electric strength of insulating materials – Test methods –

Part 3: Additional requirements for 1,2/50 µs impulse tests

Rigidité diélectrique des matériaux isolants – Méthodes d’essai –

Partie 3: Exigences complémentaires pour les essais

aux ondes de choc 1,2/50 µs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX J
ICS 17.220.99; 29.035.01 ISBN 978-2-8322-1201-1

– 2 – 60243-3 © IEC:2013
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Significance of the test . 6
5 Electrodes and test specimens . 7
6 Conditioning before tests . 7
7 Surrounding medium . 7
8 Electrical apparatus . 7
8.1 Voltage source . 7
8.2 Voltage measurement . 8
9 Procedure . 8
10 Application of voltage . 8
10.1 Breakdown test . 8
10.2 Proof tests . 8
11 Criterion of breakdown . 9
12 Number of tests . 9
13 Report . 9

Figure 1 – Full impulse-voltage wave . 6

60243-3 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC STRENGTH OF INSULATING MATERIALS –
TEST METHODS –
Part 3: Additional requirements for 1,2/50 µs impulse tests

FOREWORD
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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 60243-3 has been prepared by technical committee 112: Evaluation
and qualification of electrical insulation materials and systems.
This third edition cancels and replaces the second edition, published in 2001, and constitutes
an editorial revision.
This part of IEC 60243 shall be read in conjunction with IEC 60243-1.
The text of this standard is based on the following documents:
CDV Report on voting
112/246/CDV 112/267A/RVC
– 4 – 60243-3 © IEC:2013
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 list of all parts in the IEC 60243 series, published under the general title Electric strength of
insulating materials – Test methods, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
stability 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.
60243-3 © IEC:2013 – 5 –
ELECTRIC STRENGTH OF INSULATING MATERIALS –
TEST METHODS –
Part 3: Additional requirements for 1,2/50 µs impulse tests

1 Scope
This part of IEC 60243 gives requirements additional to those in IEC 60243-1 for the
determination of the electric strength of solid insulating materials under 1,2/50 µs impulse
voltage stress.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
IEC 60243-1:2013, Electric strength of insulating materials – Test methods – Part 1: Tests at
power frequencies
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60243-1, together
with the following, apply.
3.1
full impulse-voltage wave
aperiodic transient voltage that rises rapidly to a maximum value, then falls less rapidly to zero
(see Figure 1)
3.2
peak value (of an impulse-voltage wave)
U
P
maximum value of voltage
3.3
virtual peak value (of an impulse-voltage wave)
U
value derived from a recording of an impulse-voltage wave on which high-frequency
oscillations, or overshoot of a limited magnitude, may be present
3.4
virtual origin (of an impulse-voltage wave)
O
point of intersection O with the line of zero voltage of a line drawn through the points of 0,3
and 0,9 times the virtual peak value on the front of an impulse-voltage wave (see Figure 1)

– 6 – 60243-3 © IEC:2013
3.5
virtual front time (of an impulse-voltage wave)
t
equal to 1,67 times the interval t between the instants whe
...