IEC 61860 pdf download.DIMENSIONS OF LOW-PROFILE CORES MADE OF MAGNETIC OXIDES
This International Standard specifies the dimensions that are of importance for mechanical interchangeability of a preferred range of low-profile cores made of magnetic oxides and the effective parameter values to be used in calculations involving these cores. The general considerations upon which the design of this range of cores is based are given in annex A.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. IEC 60205:1966, Calculation of the effective parameters of magnetic piece parts Amendment 1 (1976) Amendment 2 (1981) IEC 60431:1983, Dimensions of square cores (RM-cores) made of magnetic oxides and associated parts Amendment 1 (1995) IEC 61185:1992, Magnetic oxide cores (ETD-Cores) intended for use in power supply applications – Dimensions IEC 61246:1994, Magnetic oxides cores (E-cores) of rectangular cross-section and associated parts – Dimensions ISO 370:1975, Toleranced dimensions – Conversion from inches into millimeters and vice versa
3 Primary standard
The main dimensions shall be as given in table 1 and figure 1. A uniform dimension nomenclature has been chosen in order to facilitate a comparison of major physical attributes among different core shapes. The existing nomenclature in related standards has been also given. The effective parameters and A min values of a pair of cores shall be as given in table 2 (see IEC 60205 for definitions).