IEC 60424-1:2015

Ferrite cores - Guidelines on the limits of surface irregularities - Part 1: General specification

IEC 60424-1:2015 gives guidelines on the allowable limits of surface irregularities of ferrite cores. This standard should be considered as a general specification useful in the dialogue between ferrite core manufacturers and customers about surface irregularities. This edition includes the following significant technical changes with respect to the previous edition:
- addition of pores in 3.5 and crystallites in 3.6.

Noyaux ferrites - Lignes directrices relatives aux limites des irrégularités de surface - Partie 1: Spécification générale

L'IEC 60424-1:2015 fournit des lignes directrices relatives aux limites admissibles des irrégularités de surface des noyaux ferrites. Il convient de considérer la présente norme comme une spécification générale utile au dialogue entre les fabricants de noyaux en ferrite et leurs clients sur les irrégularités de surface. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout de pores en 3.5 et de cristallites en 3.6.

General Information

• Status: Replaced
• Publication Date: 03-Dec-2015
• ICS: 29.100.10 - Magnetic components
• Technical Committee: TC 51 - Magnetic components, ferrite and magnetic powder materials
• Drafting Committee: MT 1 - TC 51/MT 1
• Current Stage: DELPUB - Deleted Publication
• Start Date: 28-Jun-2019
• Completion Date: 16-Apr-2020

Relations

• Replaced By: IEC 63093-1:2020 - Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 1: General specification
• Effective Date: 05-Sep-2023
• Revises: IEC 60424-1:1999 - Ferrite cores - Guide on the limits of surface irregularities - Part 1: General specification
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60424-1 ®
Edition 2.0 2015-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on the limits of surface irregularities –
Part 1: General specification
Noyaux ferrites – Lignes directrices relatives aux limites des irrégularités de
surface –
Partie 1: Spécification générale

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IEC 60424-1 ®
Edition 2.0 2015-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on the limits of surface irregularities –

Part 1: General specification
Noyaux ferrites – Lignes directrices relatives aux limites des irrégularités de

surface –
Partie 1: Spécification générale

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-3028-2

– 2 – IEC 60424-1:2015 © IEC 2015

CONTENTS
FOREWORD . 3

INTRODUCTION . 5

1 Scope . 6

2 Normative reference . 6

3 Terms and definitions. 6

4 Examples of irregularities . 7

5 Locations and functions of core parts and surfaces . 7
5.1 General . 7
5.2 Mating surfaces . 7
5.3 Centre post . 8
5.4 Outer walls or legs . 8
5.5 Back wall, bottom and back surfaces . 8
5.6 Wire-slot area . 8
5.7 Wire-way area . 8
5.8 Clamping recess area . 8
6 Area and length reference for visual inspection . 8
7 Limits of surface irregularities . 11
7.1 General . 11
7.2 Chips and ragged edges . 11
7.3 Cracks . 11
7.4 Flash. 11
7.5 Pull-outs . 11
7.6 Pores . 11
7.7 Crystallites . 11
8 Sectional specifications . 11
Bibliography . 13

Figure 1 – Examples of surface irregularities . 7
Figure 2 – Location of main core parts and surfaces – Example of RM-core type . 7

Table 1 – Area and length reference for visual inspection . 10

Table 2 – IEC 60424 sectional specifications . 12

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
FERRITE CORES –
GUIDELINES ON THE LIMITS OF SURFACE IRREGULARITIES –

Part 1: General specification
FOREWORD
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International Standard IEC 60424-1 has been prepared IEC technical committee 51: Magnetic
components and ferrite materials.
This second edition cancels and replaces the first edition published in 1999. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of pores in 3.5 and crystallites in 3.6.

– 4 – IEC 60424-1:2015 © IEC 2015

The text of this standard is based on the following documents:

FDIS Report on voting
51/1107/FDIS 51/1123/RVD
Full information on the voting for the approval of this standard can b
...