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  • BSI
    BS EN 61472:2013 Live working. Minimum approach distances for a.c systems in the voltage range 72,5 kV to 800 kV. A method of calculation
    Edition: 2016
    $486.85
    / user per year

Description of BS EN 61472:2013 2016

This International Standard describes a method for calculating the minimum approach distances for live working, at maximum voltages between 72,5 kV and 800 kV. This standard addresses system overvoltages and the working air distances or tool insulation between parts and/or workers at different electric potentials.

The required withstand voltage and minimum approach distances calculated by the method described in this standard are evaluated taking into consideration the following:

  • workers are trained for, and skilled in, working in the live working zone;

  • the anticipated overvoltages do not exceed the value selected for the determination of the required minimum approach distance;

  • transient overvoltages are the determining overvoltages;

  • tool insulation has no continuous film of moisture or measurable contamination present on the surface;

  • no lightning is seen or heard within 10 km of the work site;

  • allowance is made for the effect of conducting components of tools;

  • the effect of altitude, insulators in the gap, etc, on the electric strength is taken into consideration.

For conditions other than the above, the evaluation of the minimum approach distances may require specific data, derived by other calculation or obtained from additional laboratory investigations on the actual situation.



Standard NumberBS EN 61472:2013
TitleLive working. Minimum approach distances for a.c systems in the voltage range 72,5 kV to 800 kV. A method of calculation
StatusDefinitive
Publication Date2016-03-31
ReplacesBS EN 61472:2004
Identical National Standard OfIEC 61472:2013, IEC 61472:2013/COR1:2015, EN 50408:2008/A1:2011
CorrectsBS EN 61472:2013
DescriptorsElectrical insulation, Voltage, Formulae (mathematics), Live working, Electric shocks, Overvoltage, Electrical insulation devices, Occupational safety, Overvoltage protection, Mathematical calculations, Safety measures, Electrical insulating materials, Electrical safety, Alternating current
ICS29.240.20 Power transmission and distribution lines, 13.260 Protection against electric shock. Live working, 29.260.99 Other electrical equipment for working in special conditions
CommitteePEL/78
ISBN978 0 580 92887 1
PublisherBSI
Pages48



About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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