ICS 29.040.20                         ETD 03

Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Second Revision) which is identical with IEC 60376 : 2018 'Specification of technical grade sulphur hexafluoride (SF6) and complementary gases to be used in its mixtures for use in electrical equipment' issued by International Electrotechnical Commission was adopted by the Bureau of Indian Standards on recommendation of the Fluids for Electrotechnical Applications Sectional Committee and approval of the Electrotechnical Division Council.

This standard was originally published in 1991 which was identical with IEC 60376 : 1971. The first revision of this standard was undertaken to align it with the IEC 60376 : 2005 and was published as IS 13072 : 2013. The second revision of this standard has been undertaken to align it with the latest version of IEC 60376 : 2018.

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