Reaffirmed 2017

NATIONAL FOREWORD

This Indian Standard (Part 1) (Second Revision) which is identical with IEC 60216-1 : 2001 ‘Electrical insulating materials — Properties of thermal endurance — Part 1: Ageing procedures and evaluation of test results’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Solid Electrical Insulating Materials and Insulating Systems Sectional Committee and approval of the Electrotechnical Division Council.

This standard was first published in 1977 and subsequently revised in 1994 to align it with IEC 60216-1 : 1990. This revision is being undertaken to align the standard with the latest version of IEC 60216-1 : 2001.

The text of IEC Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminology and 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.