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Short-circuit currents in three-phase AC systems - Part 0: Calculation of currents

Available format(s)

Hardcopy , PDF

Language(s)

English, French, English - French

Published date

23-07-2026

Publisher

International Electrotechnical Committee

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£344.15

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Summarise this standard

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IEC 60909-0:2026 This part of IEC 60909 is applicable to the calculation of short-circuit currents in low-voltage three-phase AC systems, in high-voltage three-phase AC systems, and operating at a nominal frequency of 50 Hz or 60 Hz.
Systems at highest voltages of 550 kV and above with long transmission lines are outside the scope of this document.

Committee	TC 73
DocumentType	Standard
Pages	71
PublisherName	International Electrotechnical Committee
Status	Current
Supersedes	IEC 60909-0:2016

Standards	Relationship
BS EN IEC 60909-0:2026	Equivalent
I.S. EN IEC 60909-0:2026	Equivalent

Frequently Asked Questions

IEC 60909-0 provides methods for calculating short-circuit currents in three-phase AC power systems. In practice it is applied by power-system engineers designing protection and equipment ratings.

IEC 60909-0 is an international standard published by International Electrotechnical Commission (IEC), and is applied internationally rather than in a single country.

IEC 60909-0 is International Electrotechnical Commission (IEC)'s standard for short-circuit current calculations, while IEC 61850-9-2 covers power utility automation communications (International). IEC 60909-0 provides methods for calculating short-circuit currents in three-phase AC power systems. IEC 61850-9-2 defines data models and communications for power utility automation systems.

IEC 60909-0 is used by power-system engineers designing protection and equipment ratings. It is an international standard published by International Electrotechnical Commission (IEC).

IEC 60909-0 provides methods for calculating short-circuit currents in three-phase AC power systems. It is an international standard published by International Electrotechnical Commission (IEC).

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IEC 60909-0:2026

Short-circuit currents in three-phase AC systems - Part 0: Calculation of currents

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