IS/IEC 60255 : Part 21 : Sec 2 : 1988 Electrical Relays Part 21 Vibration, Shock, Bump and Seismic Tests on Measuring Relays and Protection Equipment Section 2 Shock and bump tests
Reaffirmed 2020
NATIONAL FOREWORD
This Indian Standard (Part 21/Sec 2) which is identical with IEC 60255-21-2 : 1988 ‘Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section 2 : Shock and bump tests’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on recommendation of the Power System Relays Sectional Committeeand approval of the Electrotechnical Division Council.
The text of the 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.