ICS 17.220.20;19.080                         ETD 19

NATIONAL FOREWORD

This Indian Standard (Part 1) (Third Revision) which is identical with IEC 60060-1 : 2010 ‘High voltage test techniques — Part 1: General definitions and test requirements’ issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the High Voltage Engineering Sectional Committee and approval of the Electrotechnical Division Council.

This standard was earlier published in 1993. This revision has been undertaken to align it with the latest version of IEC 60060-1.

This third edition of IEC 60060-1 cancels and replaces the second edition, published in 1989, and constitutes a technical revision.

The significant technical changes with respect to the previous edition are as follows:

a) The general layout and text was updated and improved to make the standard easier to use.

b) Artificial pollution test procedures were removed as they are now described in IEC 60507.

c) Measurement of impulse current has been transferred to a new standard on current measurement (IEC 62475).

d) The atmospheric correction factors are now presented as formulas. – 6 – 60060-1 c IEC : 2010

e) A new method has been introduced for the calculation of the time parameters of lightning impulse waveforms. This improves the measurement of the time parameters of lightning impulses with oscillations or overshoot.

The text of the IEC Standard has been approved as suitable for publication as an Indian Standard without deviation.

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.