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Norma
IEC 60781:1989

IEC 60781:1989

Application guide for calculation of short-circuit currents in low-voltage radial systems

Guide d'application pour le calcul des courants de court-circuit dans les réseaux à basse tension radiaux

Fecha:
2004-12-17 /Anulada
Resumen (inglés):
This application guide presents a practical method to be used when calculating short-circuit currents in low-voltage networks. The method corresponds strictly with IEC 60909 and leads to conservative results with sufficient accuracy. Two short-circuit currents which differ in magnitude are to be calculated: -the maximum short-circuit current which causes the maximum thermal and electromagnetic effects on electrical equipment and determines the required capacity or rating; -the minimum short-circuit current which may be a basis for the adjustment of protective devices.
Resumen (francés):

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