This book deals with the calculation of short-circuit currents in two- and three-phase a.c. systems as well as in d.c. systems, installed as auxiliary installations in power plants and substations. It is not the objective of this book to repeat definitions and rules of norms and standards, but to explain the procedure for calculating short-circuit currents and their effects on installations and equipment. In some cases repetition of equations, tables and diagrams from norms and standards however are deemed necessary for easy understanding. It should be emphasised in this respect that the presentation within this book is mainly concentrated on installations and equipment in high voltage systems, i.e., voltage levels up to 500 kV. Special considerations have to be taken in the case of long transmission lines and in power systems with nominal voltages above 500 kV. The calculation of short-circuit currents and of their effects are based on the procedures and rules defined in the IEC documents 61660, 60909, 60865 and 60781.

Inspec keywords: power transmission lines; IEC standards; short-circuit currents; substations; power plants

Other keywords: IEC documents 61660; three-phase AC systems; short circuit currents; power systems; DC systems; auxiliary installations; IEC documents 60909; substations; IEC documents 60781; two-phase AC systems; IEC documents 60865; high voltage systems; transmission lines; power plants

Subjects: Substations