IEC 62068:2013

Electrical insulating materials and systems - General method of evaluation of electrical endurance under repetitive voltage impulses

IEC 62068:2013 applies to electrical equipment, regardless of voltage, containing an insulation system, which is:
- connected to an electronic power supply, and
- requires an evaluation of insulation endurance under repetitive voltage impulses. This standard proposes a general test procedure to facilitate screening of electrical insulating materials (EIM) and systems (EIS) and to achieve a relative evaluation of insulation endurance under conditions of repetitive impulses. This first edition of IEC 62068 replaces IEC 62068-1:2003. It has been re-numbered as IEC 62068, as decided at the Plenary Meeting of TC 112 in Prague 2011. The main changes with regard to IEC 62068-1:2003 concern the terms and definitions which are now aligned, in part, on IEC/TS 61934 and IEC/TS 60034-18-42.

Matériaux et systèmes d'isolation électriques - Méthode génerale d'évaluation de l'endurance électrique soumise à des impulsions de tension appliquées périodiquement

La CEI 62068:2013 s'applique au matériel électrique, indépendamment de la tension, comprenant un système d'isolation:
- connecté à une alimentation électronique, et
- nécessitant une évaluation de l'endurance de l'isolation soumise à des impulsions de tension appliquées périodiquement. Cette norme propose une procédure générale d'essai afin de faciliter la sélection des matériaux d'isolation électriques (MIE) et des systèmes d'isolation électriques (SIE), et de déterminer de façon relative l'endurance d'une isolation soumise à des impulsions de tension appliquées périodiquement. La première édition de la CEI 62068 remplace la CEI 62068-1:2003. L'intitulé du document a été modifié en CEI 62068, ce qui a été décidé lors de la réunion plénière du CE 112 à Prague, en 2011. Les principales modifications par rapport à la CEI 62068-1:2003 concernent les termes et les définitions, qui sont à présent alignés en partie sur la CEI/TS 61934 et la CEI/TS 60034-18-42.

General Information

• Status: Published
• Publication Date: 10-Mar-2013
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.080.30 - Insulation systems
• Technical Committee: TC 112 - Evaluation and qualification of electrical insulating materials and systems
• Drafting Committee: WG 3 - TC 112/WG 3
• Current Stage: PPUB - Publication issued
• Start Date: 31-Mar-2013
• Completion Date: 11-Mar-2013

Relations

• Replaces: IEC 62068-1:2003 - Electrical insulation systems - Electrical stresses produced by repetitive impulses - Part 1: General method of evaluation of electrical endurance
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62068 ®
Edition 1.0 2013-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical insulating materials and systems – General method of evaluation of
electrical endurance under repetitive voltage impulses

Matériaux et systèmes d'isolation électriques – Méthode générale d’évaluation
de l'endurance électrique soumise à des impulsions de tension appliquées
périodiquement
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IEC 62068 ®
Edition 1.0 2013-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical insulating materials and systems – General method of evaluation of

electrical endurance under repetitive voltage impulses

Matériaux et systèmes d'isolation électriques – Méthode générale d’évaluation

de l'endurance électrique soumise à des impulsions de tension appliquées

périodiquement
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX N
ICS 29.080.30 ISBN 978-2-83220-676-8

– 2 – 62068 © IEC:2013
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General test procedures . 8
4.1 Overview . 8
4.2 Test object . 9
4.3 Screening test method . 9
4.3.1 General . 9
4.3.2 Test procedure . 9
4.3.3 RPDIV and RPDEV measurements . 9
4.3.4 Data processing . 9
4.3.5 Evaluation . 10
4.4 Endurance test method. 10
4.4.1 Reference EIS . 10
4.4.2 Comparison test . 10
5 Test impulse-voltage characteristics . 11
Annex A (informative) Impulse ageing . 12
Bibliography . 15

Table 1 – Test impulse-voltage characteristics . 11

62068 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL INSULATING MATERIALS AND SYSTEMS –
GENERAL METHOD OF EVALUATION OF ELECTRICAL ENDURANCE
UNDER REPETITIVE VOLTAGE IMPULSES

FOREWORD
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international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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International Standard IEC 62068 has been prepared by IEC technical committee 112:
Evaluation and qualification of electrical insulating materials and systems.
This first edition of IEC 62068 replaces IEC 62068-1:2003. It has been re-numbered as
IEC 62068, as decided at the Plenary Meeting of TC 112 in Prague 2011.
The main changes with regard to IEC 62068-1:2003 concern the terms and definitions which
are now aligned, in part, on IEC/TS 61934 [1] and IEC/TS 60034-18-42 [2].
___________
Figures in square brackets refer to the bibliography.

– 4 – 62068 © IEC:2013
The text of this standard is based on the following documents:
FDIS Report on voting
112/234/FDIS 112/242/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.
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.
62068 © IEC:2013 – 5 –
ELECTRICAL INSULATING MATERIALS AND SYSTEMS –
GENERAL METHOD OF EVALUATION OF ELECTRICAL ENDURANCE
UNDER REPETITIVE VOLTAGE IMPULSES

1 Scope
This International Standard applies to electrical equipment, regardless of voltage, containing
an insulation system, which is
– connected to an electronic power supply, and
– requires an evaluation of insulation endurance under repetitive voltage impulses.
This standard proposes a general test procedure to facilitate screening of electrical insulating
materials (EIM) and systems (EIS) and to achieve a relative evaluation of insulation
endurance under conditions of repetitive impulses.
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 62539, Guide for the statistical analysis of electrical insulation breakdown data
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
electrical insulating material
EIM
material with negligibly low electric conductivity, used to separate conducting parts at different
electrical potentials
[SOURCE: IEC 60505:2011, definition 3.1.2 [3]
3.2
electrical insulation system
EIS
insulating structure containing one or more electrical insulating materials (EIM) together with
associated conducting parts employed in an electrotechnical device
[SOURCE: IEC 60505:2011, definition 3.1.1 [2]
3.3
candidate EIS
EIS under evaluation to determine its electrica
...