HD 581 S1:1991
(Main)Application guide for calculation of short-circuit currents in low-voltage radial systems
Application guide for calculation of short-circuit currents in low-voltage radial systems
This application guide presents a practical method to be used when calculating short-circuit currents in low-voltage networks. The method corresponds strictly with HD 533 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.
Berechnung von Kurzschlußströmen in unvermaschten Drehstrom-Niederspannungsstrahlennetzen; Anwendungsleitfaden
Guide d'application pour le calcul des courants de court-circuit dans les réseaux à basse tension radiaux
Présente une méthode pratique de calcul des courants de court-circuit dans les réseaux à basse tension. Cette méthode correspond rigoureusement à la HD 533 et conduit à des résultats prudents et suffisamment précis. Deux courants de court-circuit, qui diffèrent en amplitude, sont à considérer: - le courant de court-circuit maximal qui provoque les plus grands effets thermiques et électromagnétiques sur le matériel électrique et détermine ses caractéristiques; - le courant de court-circuit minimal qui peut servir de base au réglage des dispositifs de protection.
Application guide for calculation of short-circuit currents in low voltage radial systems (IEC 60781:1989)
General Information
- Status
- Withdrawn
- Publication Date
- 17-Apr-1991
- Withdrawal Date
- 31-May-2006
- Technical Committee
- CLC/SR 73 - Short-circuit currents
- Drafting Committee
- IEC/TC 73 - IEC_TC_73
- Parallel Committee
- IEC/TC 73 - IEC_TC_73
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 01-Jun-2006
- Completion Date
- 01-Jun-2006
Relations
- Effective Date
- 10-Feb-2026
- Effective Date
- 09-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
- Effective Date
- 03-Feb-2026
Frequently Asked Questions
HD 581 S1:1991 is a standardization document published by CLC. Its full title is "Application guide for calculation of short-circuit currents in low-voltage radial systems". This standard covers: This application guide presents a practical method to be used when calculating short-circuit currents in low-voltage networks. The method corresponds strictly with HD 533 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.
This application guide presents a practical method to be used when calculating short-circuit currents in low-voltage networks. The method corresponds strictly with HD 533 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.
HD 581 S1:1991 has the following relationships with other standards: It is inter standard links to IEC 60050-441:1984, EN ISO 3680:2004, HD 472 S1:1989, HD 533 S1:1991, EN 60909-0:2001. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
HD 581 S1:1991 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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