Standard

NEK IEC 60781:1989

Jan 1989 Withdrawn

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Language English

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Abstract

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.

Document information

Standard from NEK
Published: 30 January 1989
Withdrawn: 28 January 2005
Edition: 1.0
Version: 1
Document type: NAT
ISBN:

ICS 17.220.01
ICS 29.240.20
National Committee NEK/NK73

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Adopted from: IEC PAS 61158-4-22:2009 ED1
Adopted from: ISO/IEC 29341-6-2:2008 ED1

NEK IEC 60781:1989

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Abstract

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