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4T - Introduction to Short Circuit Current Calculations

4 Technical Hours
4T - Introduction to Short Circuit Current Calculations is available for purchase in increments of 1



Title: Introduction to Short Circuit Current Calculations


Contact Hours: 4 Hours Technical

Language: English

Format: Lecture (No Video)



This course presents the subject of short-circuit studies in a very structured fashion. First, a simple equivalent circuit is developed for a generic power system, system impedances are recalculated to common base and fault are calculated at various locations throughout the system. A detailed explanation is offered for calculation of three phase faults. Explained techniques can be also verified by any commercial power system software package.

Short-circuit studies are done to determine the magnitude of the prospective currents flowing throughout the power system at various time intervals after a fault occurs. The magnitude of the currents flowing through the power system after a fault varies with time until they reach a steady-state condition. The information is used to select fuses, breakers, and switchgear ratings in addition to setting protective relays.

This behaviour is due to system characteristics and dynamics. During this time, the protective system is called on to detect, interrupt, and isolate these faults. The duty imposed on this equipment is dependent upon the magnitude of the current, which is dependent on the time from fault inception. This is done for various types of faults (three phase, phase-to-phase, double-phase-to-ground, and phase-to-ground) at different locations throughout the system.

In Introduction to Short Circuit Current Calculations, you'll learn...

  • Short circuit current calculation for the industrial power system
  • Basic theory for short circuit calculation in the electrical power system
  • How excessive short circuit currents can be mitigated


About The Author 

Velimir started his professional career in the Electrical Engineering Institute "Nikola Tesla" Belgrade as Project Engineer working on various distribution system planning projects. He moved to Middle East where he is involved in analysis and planning of the EHV and MV transmission and distribution networks as well as conceptual and detailed design, installation and commissioning of substations for major consultancies and local utility companies. He also got significant experience working for the major oil companies solving their complex operational issues helping them to improve overall production.

He modelled various phenomena in the power systems including steady state, dynamic, harmonic and fast transient responses. He has good knowledge in substation design, HV cable sizing and installation and earthing system design. He understands how projects are successfully managed throughout complete cycle. He has profound knowledge of power system modelling and analysis software tools, CAD design and GIS systems.     

He has rich experience working on projects in UK, Qatar, United Arab Emirates, Malaysia, Bahrain and Serbia. Velimir authored several technical papers that were published in IEEE proceedings. He is a member of IEEE Power Society and CIGRE.

He runs and operates Gridtect (www.gridtect.com) and can be reached via info@gridtect.com