IS 14956 : Part 2 : 2025/IEC 61472-2 : 2021 Live Working - Minimum Approach Distances - Part 2 Method of Determination of the Electrical Component Distance for a.c. Systems from 1.0 kV to 72.5 kV

ICS 13.260; 29.240.99; 29.260.99

ETD 36

NATIONAL FOREWORD

This Indian Standard (Part 2) which is identical to IEC 61472-2 : 2021 'Live working - Minimum approach distances - Part 2: Method of determination of the electrical component distance for AC systems from 1,0 kV to 72,5 kV' issued by the International Electrotechnical Commission (IEC) was adopted by the Bureau of Indian Standards on the recommendation of the Tools and Equipment for Live Working Sectional Committee and approval of the Electrotechnical Division Council.

This standard specifies a method for determining the electrical component of the minimum approach distances for live working on a.c. systems with nominal voltages from 1.0 kV to 72.5 kV. It provides a risk-based approach to calculate safe distances considering the effects of overvoltages and insulation withstand. The standard helps ensure worker safety by defining procedures and parameters for accurate minimum approach distances determination.

This standard is published in two parts. The other part in the series is:

Part 1 a.c. systems in the voltage range 72.5 kV to 800 kV - A method of calculation

The text of the IEC Standard has been approved as suitable for publication as an Indian Standard without deviations. 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' appears referring to this standard, they should be read as 'Indian Standard'; and

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.