PD 7639-1:1994 : Short-circuit current calculation in three-phase a.c. systems - Part 1. Factors for the calculation of short-circuit currents in three-phase a.c. systems according to BS 7639
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This IEC Technical Report aims to show the origin and the application as far as necessary of the factors used to meet the demands of technical precision and simplicity when calculating short-circuit currents according to IEC 909.
PD 7639-1:1994 : Short-circuit current calculation in three-phase a.c. systems - Part 1. Factors for the calculation of short-circuit currents in three-phase a.c. systems according to BS 7639