Live working. Minimum approach distances Method of determination of the electrical component distance for AC systems from 1,0 kV to 72,5 kV

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

11-05-2021

Publisher

British Standards Institution

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.

Committee	PEL/78
DocumentType	Standard
ISBN	9780539020700
Pages	22
PublisherName	British Standards Institution
Status	Current
SupersededBy	BS EN IEC 60034-14:2018