SN EN 61660-1 : 1997

1 General
    1.1 Scope and object
    1.2 Normative references
    1.3 Definitions
    1.4 Symbols and subscripts
2 Calculation of short-circuit currents
    2.1 General
    2.2 Calculating methods
    2.3 Resistance and inductance of conductor
    2.4 Rectifier
    2.5 Battery
    2.6 Capacitor
    2.7 DC motor with independent excitation
3 Calculation of the total short-circuit current
    3.1 Correction factor
    3.2 Superimposing the partial short-circuit currents
          at the short-circuit location
    3.3 Standard approximation function
Annex A Equations
Annex ZA (normative) Normative references to international
publications with their corresponding European publications

Covers a method for calculation of short-circuit currents in d.c. auxiliary systems in power plants and substations, which can be equipped with equipment acting as short-circuit sources. Applies only to rectifiers in three-phase a.c. bridge connection.