Short circuit calculation according GOST standard.

Abstract

Correct calculation of the short-circuit currents is a very important task in terms of designing an electrical installation because it affects the sizing of the equipment and setting of the protection relays. There are different ways how to calculate the short-circuit current. This diploma thesis shows the approach of the GOST standard which is widely spread in the territory of the Russian Federation and former Soviet republics. There are two GOST standards that govern the calculation of the short-circuit current in the networks with rated voltage below and above 1 kV – GOST 28249-93 and GOST R 52735-2007, respectively. Unfortunately, these standards have unclear structure and sometimes lack information, so the main purpose of this diploma thesis is to get recommendations of mentioned above standards, add some missing information from the supplementary documentation and merge them into one transparent document which can help an unfamiliar person to calculate short-circuit currents in accordance with GOST standard independently and confidently.