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

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Abstract

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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Additional information

Publication typeInternational Standard
Publication date2021-03-09
Edition1.0
Available language(s)English/French
TC/SCTC 78 - Live workingrss
ICS13.260 - Protection against electric shock. Live working
29.240.99 - Other equipment related to power transmission and distribution networks
29.260.99 - Other electrical equipment for working in special conditions
Stability date  2023
Pages32
File size1248 KB

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