These terms were coined over a time period to identify the appropriate short circuit current magnitude that engineers could use to size the switchgears, switchboards, panelboards, and the circuit breakers.
Power System Fundamentals
Power system fundamentals covers short-circuit studies, load flow studies, arc flash studies etc. Articles here cover some of the basics too which are important if you want to understand some of these studies. The basics include per unit systems, symmetrical components, current ratings etc.
The complete article written by Steve Coleman and Aleen Mohammed (PeGuru admin) is published in the Electrical Construction & Maintenance magazine. Read this article on ECMweb at: https://ecmweb.com/arc-flash/arc-flash-hazard-evaluation Article Abstract: If you are conducting an arc flash study, you are probably using one of the many software packages that can perform the analysis for you …
Arc flash hazard is a huge concern in areas where you are operating medium voltage (1kV – 34kV) and low voltage (less than 1kV) equipment. Mostly because, when you inadvertently initiate a fault, an arc flash ensuing it releases enormous amount of heat energy. The composition of this arc includes molten bits of copper or aluminium busbar or cable.