IS 11455 : Part 3 : 2001 /IEC 852-3 : 1992 Outline Dimensions of Transformers and Inductors for Use in Telecommunication and Electronic Equipment - Part 3 : Transformers and Inductors Using YUI-1 Laminations

National Foreword

This Indian Standard ( First Revision ) which is identical with IEC 852-3 ( 1992) ‘Outline dimensions of transformers and inductors for use in telecommunication and electronic equipment - Part 3: Transformers and inductors using YU1-1 laminations’ issued by the International Electrotechnicai Commission ( IEC ) was adopted by the Bureau of Indian Standards on the recommendations of the Magnetic Components and Ferrite Materials Sectional Committee and approval of the Electronics and Telecommunication Division Council.

This standard was first published in 1988 and was based on IEC Doc: 51 (CO) 268 ‘Draft specification for outline dimensions of transformers and inductors for use in electronics and telecommunication equipment - Part 3: Transformers and inductors using YUI-1 laminations’. However, this IEC document has since been published as IEC 852-3 ( 1992) with technical modifications in the dimensions of ‘fixing holes (G)’ and ‘height (C)’. The dimensions of ‘fixing screws (M)’ have also been included in the published IEC Standard. In view of the technical modifications at the international level, this Indian Standard is being revised to align it with the latest international practices.

The text of the IEC has been approved as suitable for publication as Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point ‘(.) as the decimal marker.