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BS EN 61660-1:1997

Current

Current

The latest, up-to-date edition.

Short-circuit currents in d.c auxiliary installations in power plants and substations Calculation of short-circuit currents

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-10-2009

€271.12
Excluding VAT

Foreword
1 General
2 Calculation of short-circuit currents
3 Calculation of the total short-circuit current
Annex A (informative) - Equations for the calculation of
                        lambda[D], K[D], K[C] and t[pC]
Annex ZA (normative) - Normative references to international
                       publications with their corresponding
                       European publications

Describes a method for calculating short-circuit currents in d.c. auxiliary systems in power plants and substations.

Committee
W/-
DevelopmentNote
Supersedes 94/206713 DC. Also numbered as IEC 61660-1. (09/2005)
DocumentType
Standard
Pages
40
PublisherName
British Standards Institution
Status
Current
Supersedes

This part of IEC 61660 describes a method for calculating short-circuit currents in d.c. auxiliary systems in power plants and substations. Such systems can be equipped with the following equipment, acting as short-circuit current sources:

  • rectifiers in three-phase a.c. bridge connection for 50 Hz;

  • stationary lead-acid batteries;

  • smoothing capacitors;

  • d.c. motors with independent excitation.

NOTE Rectifiers in three-phase a.c. bridge connection for 60 Hz are under consideration. The data of other equipment may be given by the manufacturer.

This standard is only concerned with rectifiers in three-phase a.c. bridge connection. It is not concerned with other types of rectifiers.

The purpose of the standard is to provide a generally applicable method of calculation which produces results of sufficient accuracy on the conservative side. Special methods, adjusted to particular circumstances, may be used if they give at least the same precision. Short-circuit currents, resistances and inductances may also be ascertained from system tests or measurements on model systems. In existing d.c. systems the necessary values can be ascertained from measurements taken at the assumed short-circuit location. The load current is not taken into consideration when calculating the short-circuit current. It is necessary to distinguish between two different values of short-circuit current:

  • the maximum short-circuit current which determines the rating of the electrical equipment;

  • the minimum short-circuit current which can be taken as the basis for fuse and protection ratings and settings.

IEC 60038:2009 IEC standard voltages
IEC 60896-1:1987 Stationary lead-acid batteries - General requirements and methods of test. Part 1: Vented types
IEC 60050-151:2001 International Electrotechnical Vocabulary (IEV) - Part 151: Electrical and magnetic devices
IEC 60050-441:1984 International Electrotechnical Vocabulary (IEV) - Part 441: Switchgear, controlgear and fuses
EN 61660-2:1997 Short-circuit currents in d.c. auxiliary installations in power plants and substations - Part 2: Calculation of effects
IEC 61660-2:1997 Short-circuit currents in d.c. auxiliary installations in power plants and substations - Part 2: Calculation of effects
EN 60896-1:1991/A2:1992 STATIONARY LEAD-ACID BATTERIES - GENERAL REQUIREMENTS AND METHODS OF TEST - VENTED TYPES
HD 472 S1:1989/AC:2013 NOMINAL VOLTAGES FOR LOW-VOLTAGE PUBLIC ELECTRICITY SUPPLY SYSTEMS
IEC 60909:1988 Short-circuit current calculation in three-phase a.c. systems
HD 533 : 200S1 SHORT-CIRCUIT CALCULATION IN THREE-PHASE A.C. SYSTEMS

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