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

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

Status : Current   Published : July 2013

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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
StatusCurrent
Publication Date31 July 2013
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)CIGRÉ Brochure No. 72:1992, IEC 60071-1:2006, EN 60071-2:1997, IEC 61477:2009, IEC 60050, IEC 60050-651, EN 60060-1:2010, IEC 60060-1:2010, EN 60071-1:2006, EN 60743, EN 61477:2009, CIGRÉ Brochure No. 151:2000, IEC 60071-2:1996, IEC 60743
ReplacesBS EN 61472:2004
International RelationshipsIEC 61472:2013,IEC 61472:2013/COR1:2015
Amended ByCorrigendum, March 2016
DescriptorsAlternating current, Electrical safety, Electrical insulating materials, Safety measures, Mathematical calculations, Overvoltage protection, Occupational safety, Electrical insulation devices, Overvoltage, Electric shocks, Live working, Formulae (mathematics), Voltage, Electrical insulation
ICS13.260
29.240.20
29.260.99
Title in FrenchTravaux sous tension. Distances minimales d'approche pour des réseaux à courant alternatif de tension comprise entre 72,5 kV et 800 kV. Une méthode de calcul
Title in GermanArbeiten unter Spannung. Mindest-Arbeitsabstände für Wechselspannungsnetze im Spannungsbereich von 72,5 kV bis 800 kV. Berechnungsverfahren
CommitteePEL/78
ISBN978 0 580 92887 1
PublisherBSI
FormatA4
DeliveryYes
Pages48
File Size1.536 MB
Price£246.00


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