Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 1) (First Revision) which is identical with IEC 61797-1 : 1996 ‘Transformers and inductors for use in telecommunication and electronic equipment - Main dimensions of coil formers - Part 1: Coil formers for laminated cores’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendations of the Magnetic Components, Ferrite Materials, Piezoelectric and Frequency Control Devices Sectional Committee and the approval of the Electronics and Information Technology Division Council.

This standard was originally published in 1992 and was identical with IEC Document 51 (CO) 271 ‘Designation for cores and assemblies for transformers and inductors for use in telecommunication and electronic equipment - Part 1: Laminated cores’. The First revision of this standard has been undertaken to align with the latest version of IEC 61797-1 : 1996.