PD IEC/TR 60909-2:2008 - Short-circuit currents in three-phase a.c. systems. Data of electrical equipment for short-circuit current calculations

PD IEC/TR 60909-2:2008

Short-circuit currents in three-phase a.c. systems. Data of electrical equipment for short-circuit current calculations

Status : Current   Published : January 2009

Format
PDF

Format
HARDCOPY



IEC 60909-2:2008(E) comprises data of electrical equipment collected from different countries to be used when necessary for the calculation of short-circuit currents in accordance with IEC 60909-0. It may be applied for calculating short-circuit currents in low-voltage networks if they are in accordance with typical equipment employed in the user's country. The collected data and their evaluation may be used for medium- or high-voltage planning purposes and also for comparison with data given by manufacturers or electricity suppliers. For overhead lines and cables the electrical data may in some cases also be calculated from the physical dimensions and the material following the equations given in this report. This second edition cancels and replaces the first edition published in 1992 and constitutes a technical revision. The significant technical changes with respect to the previous edition are as follows:


- Subclause 2.5 gives equations and examples for the calculation of the positive-, the negative- and the zero-sequence impedances and reduction factors for high-, medium and low-voltage cables with sheaths and shields earthed at both ends.


- Subclause 2.7 gives equations and figures for the calculation of the positive-sequence impedances of busbar configurations.




Standard NumberPD IEC/TR 60909-2:2008
TitleShort-circuit currents in three-phase a.c. systems. Data of electrical equipment for short-circuit current calculations
StatusCurrent
Publication Date31 January 2009
Normative References(Required to achieve compliance to this standard)IEC 60909-0:2001, IEC 60909-3
Informative References(Provided for Information)IEC/TR 60909-1:2002, IEC 60038:2002, IEC/TR 60909-4:2000
ReplacesPD 7639-2:1994, IEC 60909-2:1992
International RelationshipsIEC TR 60909-2:2008
DescriptorsElectrical installations, Autotransformers, Electric cables, Mathematical calculations, Electrical equipment, Short-circuit currents, Synchronous machines, Asynchronous motors, Overhead power lines, Alternating current, Electric conductors, Transformers, Fault currents, Electrical components, Three-phase current, Electric current, Data, Bus-bars
ICS17.220.01
29.020
29.240.20
Title in GermanKurzschlusssströme in Drehstromnetzen. Daten elektrischer Betriebsmittel für die Berechnungen von Kurzschlussströmen
CommitteePEL/73
ISBN978 0 580 62329 5
PublisherBSI
FormatA4
DeliveryYes
Pages50
File Size1.805 MB
Price£240.00


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