IEC 60674-3-4:2022

Plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheets 4: Polyimide films used for electrical insulation

IEC 60674-3-4:2022 gives the requirements for polyimide films used for electrical purposes. Materials which conform to this specification meet established levels of performance. However, the selection of a material by a user for a specific application is 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. This second edition cancels and replaces the first edition published in 1993. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
this document has been completely revised editorially and technically and included in the IEC 60674 series of standards;
new types have been included;
the ranges of thickness have been expanded;
changes have been made to the requirements of some existing types.

Films plastiques à usages électriques - Partie 3: Spécifications pour matériaux particuliers - Feuille 4: Films de polyimide utilisés dans l'isolation électrique

IEC 60674-3-4:2022 spécifie les exigences pour les films de polyimide à usages électriques. Les matériaux conformes à la présente spécification satisfont à des niveaux établis de performance. Toutefois, le choix d’un matériau par un utilisateur pour une application spécifique repose sur les exigences réelles nécessaires pour obtenir des performances adéquates de l’application concernée, et non sur la seule présente spécification. Avertissement de sécurité: il incombe à l'utilisateur des méthodes contenues ou référencées dans le présent document de s'assurer que celles-ci sont utilisées en toute sécurité. Cette deuxième édition annule et remplace la première édition parue en 1993. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
le présent document a fait l'objet d'une révision rédactionnelle et technique complète, et a été intégré à la série de normes IEC 60674;
de nouveaux types ont été ajoutés;
les plages d'épaisseurs ont été étendues;
des modifications ont été apportées aux exigences relatives à certains types existants.

General Information

• Status: Published
• Publication Date: 21-Jun-2022
• ICS: 29.035.20 - Plastics and rubber insulating materials
• Technical Committee: TC 15 - Solid electrical insulating materials
• Drafting Committee: MT 3 - TC 15/MT 3
• Current Stage: PPUB - Publication issued
• Start Date: 19-Jul-2022
• Completion Date: 22-Jun-2022

Standards Content (Sample)

IEC 60674-3-4 ®
Edition 2.0 2022-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plastic films for electrical purposes –
Part 3: Specifications for individual materials – Sheet 4: Polyimide films used for
electrical insulation
Films plastiques à usages électriques –
Partie 3: Spécifications pour matériaux particuliers – Feuille 4: Films de
polyimide utilisés dans l'isolation électrique

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IEC 60674-3-4 ®
Edition 2.0 2022-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Plastic films for electrical purposes –

Part 3: Specifications for individual materials – Sheet 4: Polyimide films used

for electrical insulation
Films plastiques à usages électriques –

Partie 3: Spécifications pour matériaux particuliers – Feuille 4: Films de

polyimide utilisés dans l'isolation électrique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.035.20 ISBN 978-2-8322-3921-6

– 2 – IEC 60674-3-4:2022 © IEC 2022
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Classification . 7
5 Designation . 7
6 General requirements . 7
7 Dimensions. 8
7.1 Thickness . 8
7.2 Width . 8
8 Properties . 8
8.1 Properties not dependent on thickness . 8
8.2 Properties dependent on thickness . 9
9 Other properties . 10
9.1 Thermal endurance . 10
9.2 Burning characteristics. 11
10 Roll characteristics . 11
10.1 Roll diameter/film length . 11
10.2 Windability/sag . 11
10.3 Joins . 12
10.4 Difference between the film width and the roll width . 13
10.5 Cores . 13
Bibliography . 14

Table 1 – Tolerance on the width . 8
Table 2 – Properties not dependent on thickness . 9
Table 3 – Properties dependent on thickness . 10
Table 4 – Thermal endurance . 11
Table 5 – Windability/sag . 11
Table 6 – Maximum permissible number of joins per roll . 12
Table 7 – Minimum permissible distance between splices or between any splice and
the end of the roll (m) . 13
Table 8 – Difference between the film width and the roll width . 13

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PLASTIC FILMS FOR ELECTRICAL PURPOSES –

Part 3: Specifications for individual materials –
Sheet 4: Polyimide films used for electrical insulation

FOREWORD
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IEC 60674-3-4 has been prepared by IEC technical committee 15: Solid electrical insulating
materials. It is an International Standard.
This second edition cancels and replaces the first edition published in 1993. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) this document has been completely revised editorially and technically and included in the
IEC 60674 series of standards;
b) new types have been included;
c) the ranges of thickness have been expanded;
d) changes have been made to the requirements of some existing types.

– 4 – IEC 60674-3-4:2022 © IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
15/956/CDV 15/971/RVC
Full information on the voting for its approval can be found in the report on voti
...