Hlavní stránka>BS EN IEC 61472-2:2021 Live working. Minimum approach distances Method of determination of the electrical component distance for AC systems from 1,0 kV to 72,5 kV
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sklademVydáno: 2021-05-11
BS EN IEC 61472-2:2021
Live working. Minimum approach distances Method of determination of the electrical component distance for AC systems from 1,0 kV to 72,5 kV
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This standard BS EN IEC 61472-2:2021 Live working. Minimum approach distances is classified in these ICS categories:
13.260 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
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.
