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BS EN IEC 63093-7:2018:2019 Edition

BS EN IEC 63093-7:2018:2019 Edition

$102.76

Ferrite cores. Guidelines on dimensions and the limits of surface irregularities – EER-cores

Published By Publication Date Number of Pages
BSI 2019 24
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This part of IEC 63093 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of EER-cores made of ferrite, the essential dimensions of coil formers to be used with them as well the effective parameter values to be used in calculations involving them, and gives guidelines on allowable limits of surface irregularities applicable to EER-cores.

This document is a specification useful in the negotiations between ferrite core manufacturers and customers about surface irregularities.

The use of “derived” standards which give more detailed specifications of component parts while still permitting compliance with this document is discussed in Annex A.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 CONTENTS
8 FOREWORD
10 1 Scope
2 Normative references
3 Terms and definitions
4 Primary dimensions
4.1 General
11 4.2 Dimensions of EER-cores
4.2.1 Principal dimensions
Figures
Figure 1 – Dimensions of EER-cores
Tables
Table 1 – Dimensions of EER-cores
12 4.2.2 Effective parameter and Amin values
4.3 Dimensional limits for coil formers
Figure 2 – Essential dimensions of coil formers
Table 2 – Effective parameter values of EER-cores
13 5 Limits of surface irregularities
5.1 General
Figure 3 – Examples of surface irregularities
Table 3 – Dimensional limits for coil formers
14 5.2 Chips and ragged edges
5.2.1 General
5.2.2 Chips and ragged edges on the mating surfaces (see Figure 4)
5.2.3 Chips and ragged edges on the other surfaces (see Figure 4)
Figure 4 – Chip locations for EER-cores
15 Table 4 – Area and length reference for visual inspection
16 5.3 Cracks
5.4 Flash
5.5 Pull-outs
Figure 5 – Cracks and pull-out locations for EER-cores
17 5.6 Crystallites
Figure 6 – Crystallite location for EER-cores
Table 5 – Limits for cracks
18 5.7 Pores
Figure 7 – Pore location for EER-cores
19 Annex A (normative) Derived standards
20 Annex B (normative) Example of dimensions for gauges to check the dimensions of EER-cores meeting this primary standard
B.1 General
B.2 Procedure and requirements
Figure B.1 – Gauge dimensions
Table B.1 – Gauge dimensions
21 Annex C (informative) Examples of allowable areas of chips
Table C.1 – Allowable areas of chips for EER-cores
22 Bibliography

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BS EN IEC 63093-7:2018
$102.76