BS 7638:1993

Отменен

Application guide for calculation of short-circuit currents in low-voltage radial systems — 38 стр.

На этот документ ссылаются

PD 7639-1:1994

Заменен

Short-circuit current calculation in three-phase a.c. systems. Factors for the calculation of short-circuit currents in three-phase a.c. systems according to BS 7639 — 80 стр.