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IEC 61472-2:2021

IEC 61472-2:2021

$22.75

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

Published By Publication Date Number of Pages
IEC 2021-03-09 36
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IEC 61472-2:2021 specifies a method for determining the electrical component of the minimum approach distances for live working, for AC systems 1 kV up to and including 72,5 kV. This document addresses system overvoltages and the working air distances between equipment and/or workers at different potentials.
The withstand voltage and minimum approach distances determined by the method described in this document can be used only if the following working conditions prevail:

  • workers are trained for, and skilled in, working live lines or close to live conductors or equipment;
  • the operating conditions are adjusted so that the statistical overvoltage does not exceed the value selected for the determination of the required withstand voltage;
  • transient overvoltages are the determining overvoltages;
  • tool insulation has no continuous film of moisture present on the surface;
  • no lightning is observed within 10 km of the work site;
  • allowance is made for the effect of the conducting components of tools.

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IEC 61472-2:2021
$22.75